JP2011056927A - Multi-material injection molding machine and multi-material injection molding method - Google Patents

Multi-material injection molding machine and multi-material injection molding method Download PDF

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JP2011056927A
JP2011056927A JP2009212581A JP2009212581A JP2011056927A JP 2011056927 A JP2011056927 A JP 2011056927A JP 2009212581 A JP2009212581 A JP 2009212581A JP 2009212581 A JP2009212581 A JP 2009212581A JP 2011056927 A JP2011056927 A JP 2011056927A
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mold
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Kunihisa Ichioka
邦久 市岡
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Meiki Seisakusho KK
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Meiki Seisakusho KK
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a multi-material injection molding machine and a multi-material injection molding method, which have a good production efficiency considering required mold clamping force and can shorten a molding cycle accompanying a mold opening and closing. <P>SOLUTION: The multi-material injection molding machine 10 includes a mold 14, 15 attached to a first board 12, a mold 21, 22 attached to a second board 13, a middle mold 27 arranged between the mold 14, 15 and the mold 21, 22, a movement mechanism 29 moving the middle mold 27 or the cavity 28 at least in a direction perpendicular to a mold opening and closing direction, a first injection device 31 injecting to a plurality of first cavities C1, C1 formed respectively between the mold 14 and the middle mold 27 and between the mold 21 and the middle mold 27, and other injection device 32 except the first injection device 31, which carries out the injection to a plurality of other cavities C2, C2 formed between the mold 15 and the middle mold 27 and between the mold 22 and the middle mold 27 respectively, and different from the first cavities C1, C1 in shape. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、一次成形した一次成形品に少なくとも二次成形を行う多材射出成形機および多材射出成形方法に関するものである。   The present invention relates to a multi-material injection molding machine and a multi-material injection molding method for performing at least secondary molding on a primary molded product that has been primary molded.

一次成形した一次成形品に少なくとも二次成形を行う多材射出成形機としては、特許文献1および特許文献2に記載されたものが知られている。特許文献1は、可動盤に回転盤が取付けられており、回転盤に取付けられた2個の可動型を回転移動可能となっている。また固定盤には2個の固定型が固定的に取付けられている。そして一次射出により成形した一次成形品を可動型とともに二次成形位置へ移動させ、異なる射出装置から二次射出を行って多材成形品を成形する。しかしながら特許文献1では次のような問題があった。   As a multi-material injection molding machine that performs at least secondary molding on a primary molded product that has been primary molded, those described in Patent Document 1 and Patent Document 2 are known. In Patent Document 1, a rotating plate is attached to a movable platen, and two movable molds attached to the rotating plate can be rotated. Two fixed molds are fixedly attached to the fixed platen. Then, the primary molded product molded by the primary injection is moved to the secondary molding position together with the movable mold, and the secondary injection is performed from different injection devices to form a multi-material molded product. However, Patent Document 1 has the following problems.

即ち特許文献1では、複数の金型が盤に対して並列的に並んで配設されているため、両方のキャビティの投影面積に比例して型締力が必要となる。そして2面の金型を有し、各金型にキャビティが1個づつ形成されるタイプでは、1回の型開閉毎に1個の成形品しか成形ができなかった。従って1個の成形品を得るために2面分の型締力が必要となるという問題があった。   That is, in Patent Document 1, since a plurality of molds are arranged in parallel to the board, a mold clamping force is required in proportion to the projected areas of both cavities. In the type having two molds and one cavity formed in each mold, only one molded product can be molded every time the mold is opened and closed. Therefore, in order to obtain one molded product, there is a problem that a clamping force for two surfaces is required.

前記の問題に対応するものとして特許文献2に記載されたものが知られている。特許文献2では固定金型と可動金型の中間に垂直軸に沿って回転する中間金型(可動型部)が設けられている。そして固定金型と中間金型の第1型部との間で一次成形を行った後、中間金型を反転し、可動金型と中間金型の第1型部との間のキャビティで二次成形を行う。またその際に第2型部は反転され、固定金型との間のキャビティで次の一次成形を行う。特許文献2のタイプは、前記2個のキャビティが型開閉方向に重なるためにキャビティ1面分の型締力またはそれに近い型締力で前記2個のキャビティの型締が行えるという利点がある。しかし特許文献2については、一次成形から二次成形に移行する際に、中間金型の端部が固定金型や可動金型に当接しないように回転させるために可動盤を大きく型開きする必要があり、その結果、成形サイクルが長くなるという問題があった。また可動盤を大きく型開きするデーライトの問題等により設置スペースを広く必要となるものであった。また特許文献2については、型取付時に固定金型や可動金型に対して、中間金型の高さを調整するのが難しい場合があった。一方特許文献2の装置を縦型にすることも考えられるが、その場合にも可動盤を大きく型開きする必要がある問題に加えて、中間金型の回転軸を支える脚部を頑丈な構造にする必要があるという問題がある。   The thing described in patent document 2 as a thing corresponding to the said problem is known. In Patent Document 2, an intermediate mold (movable mold part) that rotates along a vertical axis is provided between the fixed mold and the movable mold. Then, after primary molding is performed between the fixed mold and the first mold part of the intermediate mold, the intermediate mold is reversed, and the second mold is formed in the cavity between the movable mold and the first mold part of the intermediate mold. Next molding is performed. At that time, the second mold part is inverted, and the next primary molding is performed in the cavity between the fixed molds. The type of Patent Document 2 has an advantage that the two cavities are overlapped in the mold opening / closing direction, so that the two cavities can be clamped with a mold clamping force for one surface of the cavity or a mold clamping force close thereto. However, with respect to Patent Document 2, when moving from primary molding to secondary molding, the movable plate is greatly opened to rotate so that the end of the intermediate mold does not come into contact with the fixed mold or the movable mold. As a result, there is a problem that the molding cycle becomes long. In addition, a large installation space is required due to the problem of daylight that greatly opens the movable plate. In addition, in Patent Document 2, it may be difficult to adjust the height of the intermediate mold with respect to the fixed mold or the movable mold when the mold is attached. On the other hand, it is conceivable that the device of Patent Document 2 is a vertical type, but in that case, in addition to the problem that the movable plate needs to be opened largely, the legs that support the rotating shaft of the intermediate mold are sturdy. There is a problem that needs to be made.

特開2006−103205号公報(請求項2、0035、図2)JP 2006-103205 A (Claim 2, 0035, FIG. 2) 特開2007−50585号公報(請求項1、図1〜図12)JP 2007-50585 (Claim 1, FIGS. 1 to 12)

本発明では上記の問題を鑑みて、必要とされる型締力の割に生産効率がよく、型開閉に伴う成形サイクルを短縮することが可能な多材射出成形機および多材射出成形方法を提供することを目的とする。   In the present invention, in view of the above problems, a multi-material injection molding machine and a multi-material injection molding method that have high production efficiency for the required clamping force and can shorten the molding cycle associated with mold opening and closing. The purpose is to provide.

本発明の請求項1に記載の多材射出成形機は、一次成形した一次成形品に少なくとも二次成形を行う多材射出成形機において、第1の盤に取付けられる金型と、第2の盤に取付けられる金型と、前記第1の盤に取付けられる金型と前記第2の盤に取付けられる金型との間に配設される中間金型と、中間金型またはそのキャビティを少なくとも型開閉方向と直交する方向に移動させる移動機構と、前記第1の盤に取付けられる金型および中間金型の間と第2の盤に取付けられる金型および中間金型の間にそれぞれ形成される複数の一次キャビティに射出を行う第1の射出装置と、前記第1の盤に取付けられる金型および中間金型の間と第2の盤に取付けられる金型と中間金型の間にそれぞれ形成され前記一次キャビティと形状の異なる複数の他のキャビティに射出を行う前記第1の射出装置以外の他の射出装置と、が備えられたことを特徴とする。   A multi-material injection molding machine according to claim 1 of the present invention is a multi-material injection molding machine that performs at least secondary molding on a primary molded product that has been primary molded, and a mold that is attached to a first board, A mold attached to the board, an intermediate mold disposed between the mold attached to the first board and the mold attached to the second board, and the intermediate mold or its cavity at least A moving mechanism for moving in a direction orthogonal to the mold opening / closing direction, and a mold between the mold and intermediate mold attached to the first board and a mold and intermediate mold attached to the second board, respectively. A first injection device for injecting into a plurality of primary cavities, a mold and an intermediate mold attached to the first board, and a mold and an intermediate mold attached to the second board, respectively. A plurality of other formed and different shapes from the primary cavity And other injection devices other than the first injection apparatus for performing an injection into the cavity, characterized in that is provided.

本発明の請求項2に記載の多材射出成形機は、請求項1において、型開閉方向に設けられた回転軸を中心に回転または反転される中間盤が配設され、前記中間盤の両面にそれぞれ複数の中間金型とそのキャビティ形成面が配設されたことを特徴とする。   A multi-material injection molding machine according to a second aspect of the present invention is the multi-material injection molding machine according to the first aspect, wherein an intermediate plate that is rotated or inverted about a rotation shaft provided in the mold opening / closing direction is disposed, and both surfaces of the intermediate plate are arranged. A plurality of intermediate molds and a cavity forming surface thereof are disposed respectively.

本発明の請求項3に記載の多材射出成形機は、請求項1において、型開閉方向に設けられた回転軸を中心に回転または反転される中間金型が配設され、前記中間金型の両面にそれぞれ複数のキャビティ形成面が配設されたことを特徴とする。   A multi-material injection molding machine according to a third aspect of the present invention is the multi-material injection molding machine according to the first aspect, wherein an intermediate mold that is rotated or inverted about a rotation shaft provided in a mold opening / closing direction is disposed, and the intermediate mold A plurality of cavity forming surfaces are disposed on each of the two surfaces.

本発明の請求項4に記載の多材射出成形機は、請求項1ないし請求項3のいずれか1項において、前記第1の盤と第2の盤は上下方向に配設され、上下方向に型開閉がなされる縦型射出成形機であることを特徴とする。   A multi-material injection molding machine according to a fourth aspect of the present invention is the multi-material injection molding machine according to any one of the first to third aspects, wherein the first board and the second board are arranged in the vertical direction. It is a vertical injection molding machine in which the mold is opened and closed.

本発明の請求項5に記載の多材射出成形方法は、一次成形した一次成形品に少なくとも二次成形を行う多材射出成形方法において、第1の盤に取付けられる金型と、第2の盤に取付けられる金型と、前記第1の盤に取付けられる金型と前記第2の盤に取付けられる金型との間に配設される中間金型と、中間金型またはそのキャビティを少なくとも型開閉方向と直交する方向に移動させる移動機構と、第1の射出装置と、前記第1の射出装置以外の他の射出装置とが備えられ、前記第1の盤に取付けられる金型および中間金型の間と第2の盤に取付けられる金型および中間金型の間に形成される複数の一次キャビティに前記第1の射出装置から射出を行い複数の一次成形品を成形した後、前記第1の盤に取付けられる金型および中間金型の間と第2の盤に取付けられる金型と中間金型の間にそれぞれ形成され前記一次成形品に接続される複数の他のキャビティに前記他の射出装置から射出を行い複数の多材成形品を成形することを特徴とする。   A multi-material injection molding method according to claim 5 of the present invention is a multi-material injection molding method in which at least secondary molding is performed on a primary molded product which has been primary molded, and a mold attached to a first board, A mold attached to the board, an intermediate mold disposed between the mold attached to the first board and the mold attached to the second board, and the intermediate mold or its cavity at least A mold that is provided with a moving mechanism that moves in a direction orthogonal to the mold opening / closing direction, a first injection device, and an injection device other than the first injection device, and is attached to the first panel and an intermediate After injecting from the first injection device into a plurality of primary cavities formed between the mold and between the mold attached to the second board and the intermediate mold, a plurality of primary molded products are formed, Between the mold and intermediate mold attached to the first panel Injection from the other injection device into a plurality of other cavities respectively formed between a mold attached to the board 2 and an intermediate mold and connected to the primary molded product to form a plurality of multi-material molded products It is characterized by that.

本発明の多材射出成形機または多材射出成形方法は、一次成形した一次成形品に少なくとも二次成形を行う多材射出成形機において、第1の盤に取付けられる金型と、第2の盤に取付けられる金型と、前記第1の盤に取付けられる金型と前記第2の盤に取付けられる金型との間に配設される中間金型と、中間金型またはそのキャビティを少なくとも型開閉方向と直交する方向に移動させる移動機構と、前記第1の盤に取付けられる金型および中間金型の間と第2の盤に取付けられる金型および中間金型の間にそれぞれ形成される複数の一次キャビティに射出を行う第1の射出装置と、前記第1の盤に取付けられる金型および中間金型の間と第2の盤に取付けられる金型と中間金型の間にそれぞれ形成され前記一次キャビティと形状の異なる複数の二次キャビティに射出を行う前記第1の射出装置以外の他の射出装置と、が備えられているので、必要とされる型締力の割に生産効率がよく、型開閉に伴う成形サイクルを短縮することができる。   A multi-material injection molding machine or a multi-material injection molding method according to the present invention is a multi-material injection molding machine that performs at least secondary molding on a primary molded product that has been primary molded, a mold attached to a first board, A mold attached to the board, an intermediate mold disposed between the mold attached to the first board and the mold attached to the second board, and the intermediate mold or its cavity at least A moving mechanism for moving in a direction orthogonal to the mold opening / closing direction, and a mold between the mold and intermediate mold attached to the first board and a mold and intermediate mold attached to the second board, respectively. A first injection device for injecting into a plurality of primary cavities, a mold and an intermediate mold attached to the first board, and a mold and an intermediate mold attached to the second board, respectively. A composite formed and different in shape from the primary cavity. In addition to the first injection device for injecting into the secondary cavity, the production cycle is good for the required clamping force and the molding cycle accompanying the mold opening and closing Can be shortened.

図1は、本実施形態の多材射出成形機および多材射出成形方法を示す図であって、型開して中間盤を回転させて一次成形品を二次成形側へ移動させた後の状態を示す図である。FIG. 1 is a diagram showing a multi-material injection molding machine and a multi-material injection molding method according to the present embodiment, after the mold is opened and the intermediate plate is rotated to move the primary molded product to the secondary molding side. It is a figure which shows a state. 図2は、本実施形態の多材射出成形機および多材射出成形方法を示す図であって、型締および射出を行っている状態を示す図である。FIG. 2 is a diagram showing a multi-material injection molding machine and a multi-material injection molding method according to the present embodiment, and shows a state where mold clamping and injection are performed. 図3は、本実施形態の多材射出成形機および多材射出成形方法を示す図であって、型開して二次成形の完了した多材成形品を取出す際の状態を示す図である。FIG. 3 is a diagram showing a multi-material injection molding machine and a multi-material injection molding method according to the present embodiment, and is a diagram showing a state when a multi-material molded product that has been opened and the secondary molding is completed is taken out. . 図4は、別の実施形態の多材射出成形機を示す水平断面図である。FIG. 4 is a horizontal sectional view showing a multi-material injection molding machine according to another embodiment. 図5は、更に別の実施形態の多材射出成形機および多材射出成形方法を示す図であって、一次キャビティにより一次成形品を成形している状態を示す図である。FIG. 5 is a diagram showing a multi-material injection molding machine and a multi-material injection molding method according to still another embodiment, and is a diagram showing a state in which a primary molded product is molded by a primary cavity. 図6は、更に別の実施形態の多材射出成形機および多材射出成形方法を示す図であって、一次成形した後に、中間金型を移動させた後の状態を示す図である。FIG. 6 is a diagram illustrating a multi-material injection molding machine and a multi-material injection molding method according to still another embodiment, and is a diagram illustrating a state after the intermediate mold is moved after primary molding. 図7は、更に別の実施形態の多材射出成形機および多材射出成形方法を示す図であって、二次キャビティにより多材成形品を成形している状態を示す図である。FIG. 7 is a diagram showing a multi-material injection molding machine and a multi-material injection molding method according to still another embodiment, and is a diagram showing a state where a multi-material molded product is molded by a secondary cavity.

図1ないし図3に示される本発明の本実施形態の多材射出成形機10は、一次成形した一次成形品P1に少なくとも二次成形を行うものである。縦型射出成形機である多材射出成形機10の縦型の型締装置11は、図示しないベッドに対して固定的に配設される下固定盤12の上面の金型取付面に複数の金型14,15(本実施形態では2個)が取付けられている。各金型14,15は、それぞれ1面のキャビティ形成面16,17が形成され、それぞれのキャビティ形成面16,17の形状は異なっている。具体的には一側の金型14のキャビティ形成面16は多材成形品P2の平板部を構成するため平らに形成されているのに比べて他側の金型15のキャビティ形成面17は多材成形品P2の枠部を形成するための凹部が形成されている。また一側の金型14と他側の金型15の外側の側面にはそれぞれノズルタッチ面18,19が形成され、内部にホットランナが形成されている。   A multi-material injection molding machine 10 according to this embodiment of the present invention shown in FIGS. 1 to 3 performs at least secondary molding on a primary molded product P1 subjected to primary molding. A vertical mold clamping device 11 of a multi-material injection molding machine 10 which is a vertical injection molding machine has a plurality of mold mounting surfaces on the upper surface of a lower fixed platen 12 fixedly disposed on a bed (not shown). Molds 14 and 15 (two in this embodiment) are attached. Each mold 14, 15 has one cavity forming surface 16, 17, and the shape of each cavity forming surface 16, 17 is different. More specifically, the cavity forming surface 16 of the mold 15 on the other side is formed flat to form the flat plate portion of the multi-material molded product P2 compared with the cavity forming surface 17 of the mold 15 on the other side. A concave portion for forming a frame portion of the multi-material molded product P2 is formed. In addition, nozzle touch surfaces 18 and 19 are formed on the outer side surfaces of the mold 14 on one side and the mold 15 on the other side, respectively, and a hot runner is formed inside.

下固定盤12の上方には図示しない上受圧盤が配設され、下固定盤12と上受圧盤の間には図示しないタイバが4本、縦方向に配設されている。そして前記タイバには下固定盤12の金型取付面と平行に上可動盤13が前記タイバに摺動自在に挿通されている。そして上受圧盤と上可動盤13の間には型開閉・型締機構20が配設されている。本実施形態では型開閉・型締機構20は、各金型の背面を直接押圧できるようラムを有する2個の型締シリンダと図示しない型開閉機構からなる。しかし型開閉・型締機構の種類および数は限定されない。上可動盤13の下面の金型取付面には複数の金型21,22(本実施形態では2個)が取付けられている。各金型21,22は、それぞれ1面のキャビティ形成面23,24が形成され、それぞれのキャビティ形成面23,24の形状は異なっている。すなわち上可動盤13の一側の金型21は、上方から平面視して下固定盤12の一側の金型14と同一位置に取付けられ、前記一側の金型14のキャビティ形成面16と同一形状のキャビティ形成面23が形成されている。また上可動盤13の他側の金型22は、上方から平面視して下固定盤12の他側の金型15と同一位置に取付けられ、前記他側の金型15のキャビティ形成面17と同一形状のキャビティ形成面24が形成されている。   An upper pressure receiving plate (not shown) is arranged above the lower fixed platen 12, and four tie bars (not shown) are arranged vertically between the lower fixed platen 12 and the upper pressure receiving plate. An upper movable platen 13 is slidably inserted into the tie bar in parallel with the mold mounting surface of the lower fixed platen 12. A mold opening / closing / clamping mechanism 20 is disposed between the upper pressure receiving board and the upper movable board 13. In the present embodiment, the mold opening / closing / clamping mechanism 20 includes two mold clamping cylinders having rams and a mold opening / closing mechanism (not shown) so that the back surface of each mold can be directly pressed. However, the type and number of mold opening / closing and clamping mechanisms are not limited. A plurality of molds 21 and 22 (two in this embodiment) are mounted on the mold mounting surface on the lower surface of the upper movable platen 13. Each mold 21, 22 has one cavity forming surface 23, 24, and the shape of each cavity forming surface 23, 24 is different. That is, the mold 21 on one side of the upper movable plate 13 is attached at the same position as the mold 14 on one side of the lower fixed plate 12 when viewed from above, and the cavity forming surface 16 of the mold 14 on the one side is mounted. The cavity forming surface 23 having the same shape as that of FIG. The mold 22 on the other side of the upper movable plate 13 is mounted at the same position as the mold 15 on the other side of the lower fixed plate 12 as viewed from above, and the cavity forming surface 17 of the mold 15 on the other side is mounted. The cavity forming surface 24 having the same shape as that is formed.

また下固定盤12と上可動盤13の間には中間盤25が設けられている。中間盤25は上可動盤13の平面方向中心位置から下方に向けて型開閉方向に設けられる軸である回転軸26に固定されている。そして回転軸26は、上可動盤13にベアリングにより回転自在に保持され、電動モータや減速機構等の回転機構29(移動機構)により回転可能となっている。従って中間金型27またはそのキャビティ28は、移動機構である回転機構29により少なくとも型開閉方向と直交する方向に移動される。そして回転軸26および中間盤25の内部には中間金型27内に流動させる冷却水の管や、中間金型27や中間盤25内のホットランナのヒータの電線等が配設されている。また中間盤25および回転軸26は、上可動盤13が上昇され型開きされた際に、全体が型開閉方向に移動可能となっている。本実施形態では中間盤25および回転軸26は、上可動盤13に対して自重で型開方向に相対的に移動されるようになっているが、動力により移動されるものでもよい。なお中間盤25および回転軸26は、下固定盤12に取付けられ、昇降されるように設けてもよい。更には中間盤25をベッド等から立設した台などに設け、中間盤25の外周に巻き付けられたタイミングベルトにより中間盤25を回転または反転させるようにしてもよく、前記移動機構は限定されない。   An intermediate plate 25 is provided between the lower fixed platen 12 and the upper movable platen 13. The intermediate plate 25 is fixed to a rotary shaft 26 that is a shaft provided in the mold opening / closing direction downward from the center position in the planar direction of the upper movable platen 13. The rotating shaft 26 is rotatably held by a bearing on the upper movable platen 13 and can be rotated by a rotating mechanism 29 (moving mechanism) such as an electric motor or a speed reducing mechanism. Accordingly, the intermediate mold 27 or its cavity 28 is moved at least in the direction orthogonal to the mold opening / closing direction by the rotation mechanism 29 which is a moving mechanism. Inside the rotary shaft 26 and the intermediate plate 25, a pipe of cooling water that flows into the intermediate die 27, an electric wire for a heater of the hot runner in the intermediate die 27 and the intermediate plate 25, and the like are disposed. The intermediate plate 25 and the rotary shaft 26 are movable in the mold opening / closing direction when the upper movable plate 13 is raised and the mold is opened. In the present embodiment, the intermediate plate 25 and the rotary shaft 26 are moved relative to the upper movable plate 13 by their own weight in the mold opening direction, but may be moved by power. The intermediate plate 25 and the rotary shaft 26 may be attached to the lower fixed platen 12 so as to be moved up and down. Further, the intermediate plate 25 may be provided on a stand standing up from a bed or the like, and the intermediate plate 25 may be rotated or reversed by a timing belt wound around the outer periphery of the intermediate plate 25. The moving mechanism is not limited.

そして中間盤25の上下の両面には複数の中間金型27が取付けられている。中間盤25の下面には、下固定盤12に取付けられた金型14,15と対向して2個の中間金型27,27が取付けられている。各中間金型27には前記金型14,15のキャビティ形成面16,17と対向するキャビティ形成面28がそれぞれ1面形成されている。そして前記キャビティ形成面16,17と型合せした際に、図2に示されるように形状の異なる一次キャビティC1および他のキャビティである二次キャビティC2がそれぞれ形成されるようになっている。また中間盤25の上面にも、第2の盤である上可動盤13に取付けられる金型21,22と対向して2個の中間金型27,27が取付けられている。中間金型27,27にはそれぞれ1面のキャビティ形成面28,28が形成され、前記上可動盤13に取付けられる金型21,22のキャビティ形成面23,24と型合せした際に形状の異なる一次キャビティC1および二次キャビティC2がそれぞれ形成されるようになっている。従って本発明では中間金型27は、前記第1の盤である下固定盤12に取付けられる金型14,15と前記第2の盤である上可動盤13に取付けられる金型21,22との間に配設される。本実施形態では4個の中間金型27の4面のキャビティ形成面28は、同一形状であり、型開閉方向の軸(回転軸26)を中心に型開閉方向と直交する面上を回転または反転されるようになっている。そして一次成形位置S1で一次成形した一次成形品P1を中間金型27のキャビティ形成面28に保持した状態で異なる成形位置である二次成形位置S2へ移動可能となっている。   A plurality of intermediate molds 27 are attached to the upper and lower surfaces of the intermediate plate 25. Two intermediate dies 27, 27 are attached to the lower surface of the intermediate plate 25 so as to face the dies 14, 15 attached to the lower fixed plate 12. Each intermediate mold 27 is formed with one cavity forming surface 28 facing the cavity forming surfaces 16 and 17 of the molds 14 and 15. When the molds are combined with the cavity forming surfaces 16 and 17, a primary cavity C1 and a secondary cavity C2 which are different cavities are formed as shown in FIG. Also, two intermediate molds 27 and 27 are attached to the upper surface of the intermediate board 25 so as to face the molds 21 and 22 attached to the upper movable board 13 as the second board. The intermediate molds 27 and 27 are formed with one cavity forming surfaces 28 and 28, respectively, which are shaped when matched with the cavity forming surfaces 23 and 24 of the molds 21 and 22 attached to the upper movable platen 13. Different primary cavities C1 and C2 are formed. Accordingly, in the present invention, the intermediate mold 27 includes the molds 14 and 15 attached to the lower fixed platen 12 as the first plate and the molds 21 and 22 attached to the upper movable platen 13 as the second plate. Between the two. In the present embodiment, the four cavity forming surfaces 28 of the four intermediate molds 27 have the same shape, and rotate or rotate on a surface perpendicular to the mold opening / closing direction around the axis of the mold opening / closing direction (rotating shaft 26). Inverted. The primary molded product P1 that is primarily molded at the primary molding position S1 can be moved to a secondary molding position S2 that is a different molding position while being held on the cavity forming surface 28 of the intermediate mold 27.

なお本実施形態の多材射出成形機の型締装置11は、下固定盤12と上可動盤13からなる縦型型締装置であるが、上固定盤と下可動盤からなる縦型型締装置であってもよい。また水平方向に可動盤が移動する横型射出成形機の型締装置であってもよい。更には縦型および横型に限らず、固定された位置で回転可能な中間盤に対して第1の盤と第2の盤が近接遠退方向に移動されるものでもよい。また第1の盤、第2の盤、中間盤に取付けられる各金型14,15,21,22,27は、それぞれの金型の間で複数の一次キャビティC1,C1と、前記一次キャビティC1,C1とは形状の異なる二次キャビティC2,C2が形成されるものであれば、金型の個数は一または複数でもよく限定されない。即ち1個の金型に複数のキャビティ形成面が形成されたものでもよい。また金型およびキャビティ形成面の個数は3個以上であってもよく、他のキャビティとしては二次キャビティ以外に三次キャビティ以上のキャビティを用いて同時に三次成形以上の成形を行うものでもよい。また本実施形態では前記したように下固定盤の一側の金型14のキャビティ形成面16と上可動盤13の一側の金型21のキャビティ形成面23、他側の金型15のキャビティ形成面17と他側の金型22のキャビティ形成面24はそれぞれ同一であり、中間金型27の4面のキャビティ形成面28は同一となっている。しかし下固定盤12の金型14,15と中間盤25の金型27の間に形成される形状の異なる一次キャビティC1および二次キャビティC2と、上可動盤13の金型21,22と中間盤25の金型27の間に形成される一次キャビティC1および二次キャビティC2で、上下方向の一次キャビティC1,C1および二次キャビティC2,C2の形状を相違させ、異なる多材成形品P2を成形するようにしてもよい。また一次キャビティC1および二次キャビティC2に到達するまでのランナの一部または全部をコールドランナ(スプル)としてもよい。   The mold clamping device 11 of the multi-material injection molding machine of this embodiment is a vertical mold clamping device comprising a lower fixed platen 12 and an upper movable platen 13, but a vertical mold clamping device comprising an upper fixed platen and a lower movable platen. It may be a device. Further, it may be a mold clamping device of a horizontal injection molding machine in which the movable plate moves in the horizontal direction. Furthermore, not only the vertical type and the horizontal type, the first board and the second board may be moved in the approaching and retracting direction with respect to the intermediate board that can rotate at a fixed position. The molds 14, 15, 21, 22, and 27 attached to the first board, the second board, and the intermediate board have a plurality of primary cavities C1 and C1 and the primary cavity C1 between the molds. As long as secondary cavities C2 and C2 having different shapes from C1 are formed, the number of molds may be one or more and is not limited. In other words, one mold may have a plurality of cavity forming surfaces. Further, the number of molds and cavity forming surfaces may be three or more, and other cavities may be formed at the same time as the third or higher molding using a cavity other than the secondary cavity and the third or higher cavity. In the present embodiment, as described above, the cavity forming surface 16 of the mold 14 on one side of the lower fixed platen, the cavity forming surface 23 of the mold 21 on one side of the upper movable platen 13, and the cavity of the mold 15 on the other side. The forming surface 17 and the cavity forming surface 24 of the other mold 22 are the same, and the four cavity forming surfaces 28 of the intermediate mold 27 are the same. However, the primary cavity C1 and the secondary cavity C2 having different shapes formed between the molds 14 and 15 of the lower fixed platen 12 and the mold 27 of the intermediate plate 25, and the molds 21 and 22 of the upper movable platen 13 and the middle are formed. In the primary cavity C1 and the secondary cavity C2 formed between the molds 27 of the board 25, the shapes of the primary cavities C1 and C1 and the secondary cavities C2 and C2 in the vertical direction are made different so that different multi-material molded products P2 are obtained. You may make it shape | mold. Moreover, it is good also considering a part or all of the runner until it reaches the primary cavity C1 and the secondary cavity C2 as a cold runner (sprue).

型締装置11の下固定盤12の一側と他側には、複数の一次キャビティC1,C1に第1の樹脂材料M1の射出を行う第1の射出装置31と複数の二次キャビティC2,C2に第2の樹脂材料M2の射出を行う他の射出装置である第2の射出装置32がそれぞれ加熱筒33,34およびノズル35,36が水平方向となるように配設されている。そして一次側の射出を行う第1の射出装置31のノズル35は、下固定盤12の一側の金型14のノズルタッチ面18に対して進退可能に設けられている。また二次側の射出を行う第2の射出装置32のノズル36は、下固定盤12の他側の金型15のノズルタッチ面19に対して進退可能に設けられている。なお第1の射出装置31および第2の射出装置32のノズル35,36が当接される位置は、下固定盤12、中間盤25、中間金型27、上可動盤13に取付けられる金型21,22、および上可動盤13の側面やパーティング面であってもよい。更に第1の射出装置31および第2の射出装置32は、下固定盤12や上可動盤13に形成された孔を通じて、ノズルが金型14,15,21,22に当接されるものでもよい。またノズル35,36にはシャットオフバルブ等を用いてもよい。また他の射出装置を2本以上備え、合計3本以上の射出装置を有するものでもよい。   On one side and the other side of the lower fixing plate 12 of the mold clamping device 11, a first injection device 31 for injecting a first resin material M1 into a plurality of primary cavities C1, C1 and a plurality of secondary cavities C2, A second injection device 32, which is another injection device for injecting the second resin material M2 to C2, is arranged such that the heating cylinders 33 and 34 and the nozzles 35 and 36 are in the horizontal direction. The nozzle 35 of the first injection device 31 that performs injection on the primary side is provided so as to be able to advance and retreat with respect to the nozzle touch surface 18 of the mold 14 on one side of the lower fixed platen 12. Further, the nozzle 36 of the second injection device 32 that performs injection on the secondary side is provided so as to be able to advance and retreat with respect to the nozzle touch surface 19 of the mold 15 on the other side of the lower fixed platen 12. The nozzles 35 and 36 of the first injection device 31 and the second injection device 32 are in contact with the lower fixed platen 12, the intermediate plate 25, the intermediate die 27, and the die attached to the upper movable platen 13. 21 and 22 and the side surface and parting surface of the upper movable board 13 may be sufficient. Further, the first injection device 31 and the second injection device 32 may be configured such that the nozzles are brought into contact with the molds 14, 15, 21, and 22 through holes formed in the lower fixed platen 12 and the upper movable platen 13. Good. The nozzles 35 and 36 may be shut off valves or the like. Further, two or more other injection devices may be provided, and a total of three or more injection devices may be provided.

次に本実施形態の多材射出成形機10の多材射出成形方法について説明する。図1は、多材射出成形機10の一側の一次成形位置S1で一次成形された成形品P1が型開された後、中間金型27のキャビティ形成面28に保持された状態で中間盤25が回転されて他側の二次成形位置S2へ移動された後の状態である。その際同時に他側の二次成形位置S2に位置していた中間金型27は、完成品である多材成形品P2が取り出された後にキャビティ形成面28が空の状態で前記一次成形位置S1へ移動される。なお中間盤25および回転軸26は、常に一方方向に回転されるものでもよく、180°回転された後、逆方向に180°反転されて元の位置に戻るものでもよい。また中間金型27等が3面取付けられている場合は、中間盤25を120°ずつ回転させることが望ましい。   Next, the multi-material injection molding method of the multi-material injection molding machine 10 of this embodiment will be described. FIG. 1 shows an intermediate plate in a state in which a molded product P1 primarily molded at a primary molding position S1 on one side of a multi-material injection molding machine 10 is held on a cavity forming surface 28 of an intermediate mold 27 after being opened. This is the state after 25 is rotated and moved to the other secondary molding position S2. At the same time, the intermediate mold 27 located at the other secondary molding position S2 is the primary molding position S1 with the cavity forming surface 28 empty after the finished multi-material molded product P2 is taken out. Moved to. In addition, the intermediate | middle board 25 and the rotating shaft 26 may always be rotated to one direction, and after rotating 180 degree | times, it may be reversed 180 degree | times to a reverse direction and may return to an original position. Further, when the intermediate mold 27 or the like is mounted on three surfaces, it is desirable to rotate the intermediate plate 25 by 120 °.

次に図2に示されるように、型締装置11を作動させて上可動盤13および金型21,22を下降させる。その際に最初に中間盤25の下面側に取付けられた中間金型27,27と下固定盤12に取付けられた金型14,15が当接されるが、なおも上可動盤13を下降させるにつれて、上可動盤13に対して中間盤25および回転軸26が相対的に位置変化して、中間盤25の上面側に取付けられた中間金型27と上可動盤に取付けられた金型21,22も当接され型締がなされる。そして前記第1の盤である下固定盤12に取付けられる金型14および一側に位置する中間金型27の間と第2の盤である上可動盤13に取付けられる金型21および一側に位置する中間金型27の間に、それぞれ複数の一次キャビティC1,C1が型開閉方向に重なる位置に形成される。また前記第1の盤である下固定盤12に取付けられる金型15および他側に位置する中間金型27と第2の盤である上可動盤13に取付けられる金型22および他側に位置する中間金型27の間に、それぞれ複数の二次キャビティC2,C2が型開閉方向に重なる位置に形成される。一次キャビティC1,C1とは他のキャビティである二次キャビティC2,C2は、一次成形品P1,P1に接続された状態で使用され、金型15のキャビティ形成面17および一次成形品P1(または金型22のキャビティ形成面24および一次成形品P1)によってキャビティが形成される。   Next, as shown in FIG. 2, the mold clamping device 11 is operated to lower the upper movable platen 13 and the molds 21 and 22. At that time, the intermediate molds 27 and 27 attached to the lower surface side of the intermediate board 25 are brought into contact with the molds 14 and 15 attached to the lower fixed board 12, but the upper movable board 13 is still lowered. As the position is changed, the intermediate plate 25 and the rotary shaft 26 change relative to the upper movable plate 13 so that the intermediate die 27 attached to the upper surface side of the intermediate plate 25 and the die attached to the upper movable platen. 21 and 22 are also brought into contact with each other and are clamped. And between the mold 14 attached to the lower fixed platen 12 as the first plate and the intermediate die 27 located on one side and the mold 21 and one side attached to the upper movable platen 13 as the second plate A plurality of primary cavities C1 and C1 are formed at positions overlapping each other in the mold opening / closing direction between the intermediate molds 27 located at the same position. Further, the mold 15 attached to the lower fixed platen 12 serving as the first plate and the intermediate die 27 located on the other side and the mold 22 attached to the upper movable platen 13 serving as the second plate are located on the other side. A plurality of secondary cavities C2 and C2 are formed between the intermediate molds 27 to overlap each other in the mold opening / closing direction. The secondary cavities C2 and C2, which are cavities other than the primary cavities C1 and C1, are used in a state of being connected to the primary molded products P1 and P1, and the cavity forming surface 17 of the mold 15 and the primary molded product P1 (or A cavity is formed by the cavity forming surface 24 of the mold 22 and the primary molded product P1).

そして一次側の射出を行う第1の射出装置31を下固定盤12の一側の金型14のノズルタッチ面18に当接させると共に、二次側の射出を行う第2の射出装置32を下固定盤12の他側の金型15のノズルタッチ面19に当接させる。そして型締力が及ぼされた状態で、前記第1の射出装置31からホットランナを介して一側の金型14および一次成形位置にある中間金型27との間に形成される一次キャビティC1と一側の金型21および一次成形位置にある中間金型27との間に形成される一次キャビティC1からなる複数のキャビティC1,C1に第1の射出装置31から第1の樹脂材料M1を射出(充填および保圧)する。   Then, the first injection device 31 that performs injection on the primary side is brought into contact with the nozzle touch surface 18 of the mold 14 on one side of the lower fixed platen 12, and the second injection device 32 that performs injection on the secondary side is provided. The lower fixed platen 12 is brought into contact with the nozzle touch surface 19 of the mold 15 on the other side. The primary cavity C1 formed between the first mold 14 and the intermediate mold 27 at the primary molding position via the hot runner from the first injection device 31 in a state where the clamping force is exerted. The first resin material M1 from the first injection device 31 to a plurality of cavities C1 and C1 formed of the primary cavity C1 formed between the first mold 21 and the intermediate mold 27 at the primary molding position. Inject (fill and hold).

また前記第2の射出装置32からホットランナを介して他側の金型15のキャビティ形成面17と他側に位置する中間金型27に保持された一次成形品P1の間により形成されるキャビティC2、他側の金型22のキャビティ形成面24と他側に位置する中間金型27に保持された一次成形品P1の間により形成されるキャビティC2からなる複数のキャビティC2,C2に第2の樹脂材料M2を射出(充填および保圧)する。本実施形態では、一次成形により成形される一次成形品P1は、平板状の平板であり、二次成形により異なる樹脂材料である第2の樹脂材料M2による枠部が前記一次成形品P1の周囲に固着されて多材成形品P2が成形される。なおこの際の第1の射出装置31、第2の射出装置32からの射出は同時であってもどちらか一方が先でもよい。なおいずれか一方の金型にスライドコアを使用すること等により、二次キャビティは、両方の金型のキャビティ形成面と一次成形品P1から構成することも可能である。   A cavity formed between the cavity forming surface 17 of the mold 15 on the other side and the primary molded product P1 held on the intermediate mold 27 located on the other side from the second injection device 32 via a hot runner. C2, a plurality of cavities C2 and C2 each having a cavity C2 formed between the cavity forming surface 24 of the mold 22 on the other side and the primary molded product P1 held by the intermediate mold 27 located on the other side The resin material M2 is injected (filling and holding pressure). In the present embodiment, the primary molded product P1 molded by the primary molding is a flat plate, and a frame portion made of the second resin material M2, which is a different resin material by the secondary molding, surrounds the primary molded product P1. The multi-material molded product P2 is molded by being firmly attached to. In this case, the injection from the first injection device 31 and the second injection device 32 may be performed simultaneously or one of them may be performed first. In addition, by using a slide core for any one of the molds, the secondary cavity can be constituted by the cavity forming surface of both molds and the primary molded product P1.

次に図3に示されるように型開閉・型締機構20を作動させて型開を行う。型開の際は、型閉の逆であり、最初に中間盤25の上面側の中間金型27と上可動盤13の金型21,22の間が型開され、上可動盤13が一定高さまで上昇してから、中間盤25の下面側の中間金型27と下固定盤12の金型14,15との間が型開される。そして中間盤25が下固定盤12と上可動盤13の中間位置となると型開閉・型締機構20の作動を停止させる。その際に一次成形品P1は、一次成形位置S1に位置する中間金型27のキャビティ形成面28に当接して残され、二次成形品(完成品)である多材成形品P2は、二次成形位置S2に位置する中間金型27のキャビティ形成面28に当接した状態で残される。そして中間盤25の他側から取出機37,37を進入させ、前記多材成形品P2の面に取出機37,37の吸盤を吸着させ、再び移動させて取出しを行う。この際に図示しないエジェクタや離型エアにより多材成形品P2の離型を補助するようにしてもよい。なお多材成形品P2は、下固定盤12や上可動盤13に取付けられる金型14,15,21,22の側に保持されて型開されるようにしてもよく、常に下側に位置する金型15,27に保持されるようにしてもよい。   Next, as shown in FIG. 3, the mold opening / closing / clamping mechanism 20 is operated to open the mold. When the mold is opened, it is the reverse of mold closing. First, the space between the middle mold 27 on the upper surface side of the intermediate board 25 and the molds 21 and 22 of the upper movable board 13 is opened, and the upper movable board 13 is fixed. After the height is raised, the space between the intermediate mold 27 on the lower surface side of the intermediate plate 25 and the molds 14 and 15 of the lower fixed platen 12 is opened. When the intermediate plate 25 comes to an intermediate position between the lower fixed platen 12 and the upper movable platen 13, the operation of the mold opening / closing / clamping mechanism 20 is stopped. At that time, the primary molded product P1 is left in contact with the cavity forming surface 28 of the intermediate mold 27 located at the primary molding position S1, and the multi-material molded product P2 which is a secondary molded product (finished product) is The intermediate mold 27 is left in contact with the cavity forming surface 28 located at the next molding position S2. Then, the take-out machines 37 and 37 are entered from the other side of the intermediate board 25, the suction cups of the take-out machines 37 and 37 are adsorbed on the surface of the multi-material molded product P2, and taken out by moving again. At this time, release of the multi-material molded product P2 may be assisted by an unillustrated ejector or release air. The multi-material molded product P2 may be held by the molds 14, 15, 21, and 22 attached to the lower fixed platen 12 and the upper movable platen 13, and may be opened. The molds 15 and 27 may be held.

そして取出しが完了すると回転機構29を作動させることにより回転軸26と共に中間盤25が回転され、一次成形位置S1で一次成形した一次成形品P1を中間金型27のキャビティ形成面28に保持された状態で異なる成形位置(他側の二次成形位置S2)へ移動される。そして移動が完了すると再び図1の状態となり型閉が行われる。なお本実施形態では、型開閉方向の軸を中心に型開閉方向に直交する面上を回転または反転させる中間盤25に金型27が取付けられている。そして下固定盤12や上可動盤13の金型14,15,21,22と平行に中間盤25と中間金型27を回転または反転移動されるので、特許文献2のタイプよりも型開間隔が狭い状態で中間盤25を回転または反転させることができ、成形サイクルが短縮できる。また型開閉方向に複数のキャビティC1,C2が重なっているスタックモールドの思想を取り入れたものであるので、特許文献1のタイプよりも必要とされる型締力の割に生産効率がよく、同時に複数の多材成形品P2,P2を成形することができる。そして縦型の型締装置11を採用することにより両側に第1の射出装置31および第2の射出装置32を配置することができる。また縦型の型締装置11の上可動盤13から中間盤25を吊り下げる構造を採用することにより、中間盤25を型開閉方向へ移動させる動力機構を省略することができる。   When the take-out is completed, the intermediate plate 25 is rotated together with the rotary shaft 26 by operating the rotation mechanism 29, and the primary molded product P1 that has been primarily molded at the primary molding position S1 is held on the cavity forming surface 28 of the intermediate mold 27. It moves to a different molding position (secondary secondary molding position S2) depending on the state. When the movement is completed, the state again becomes as shown in FIG. 1 and the mold is closed. In the present embodiment, the mold 27 is attached to the intermediate plate 25 that rotates or reverses the surface perpendicular to the mold opening / closing direction about the axis in the mold opening / closing direction. Since the intermediate plate 25 and the intermediate die 27 are rotated or reversed in parallel with the dies 14, 15, 21, and 22 of the lower fixed platen 12 and the upper movable platen 13, the mold opening interval is larger than the type disclosed in Patent Document 2. The intermediate plate 25 can be rotated or reversed in a narrow state, and the molding cycle can be shortened. Further, since the idea of a stack mold in which a plurality of cavities C1 and C2 overlap in the mold opening / closing direction is taken in, the production efficiency is better for the required clamping force than the type of Patent Document 1, and at the same time A plurality of multi-material molded products P2 and P2 can be molded. By adopting the vertical mold clamping device 11, the first injection device 31 and the second injection device 32 can be arranged on both sides. Further, by adopting a structure in which the intermediate plate 25 is suspended from the upper movable plate 13 of the vertical mold clamping device 11, a power mechanism for moving the intermediate plate 25 in the mold opening / closing direction can be omitted.

次に図4に示される本発明の別の実施形態の多材射出成形機40について説明する。別の実施形態の多材射出成形機40は、横型射出成形機の型締装置41に中間金型42が回転可能なスタックモールド43が取り付けられる例である。従って型締装置41には中間盤は配設されていない。型締装置41は、第1の盤である固定盤44と図示しない受圧盤の間にタイバ45が配設され、タイバ45に第2の盤である可動盤46が挿通されている。受圧盤と可動盤46の間には型締機構47が配置されている。そして固定盤44に取付けられる金型48には形状の異なる2面のキャビティ形成面49,50が形成されている。また可動盤46に取付けられる金型51にも固定盤44に取付けられる金型48と同様に同じ位置に形状の異なる2面のキャビティ形成面52,53が形成されている。   Next, a multi-material injection molding machine 40 according to another embodiment of the present invention shown in FIG. 4 will be described. A multi-material injection molding machine 40 according to another embodiment is an example in which a stack mold 43 capable of rotating an intermediate mold 42 is attached to a mold clamping device 41 of a horizontal injection molding machine. Accordingly, the mold clamping device 41 is not provided with an intermediate plate. In the mold clamping device 41, a tie bar 45 is disposed between a fixed plate 44 as a first plate and a pressure receiving plate (not shown), and a movable plate 46 as a second plate is inserted into the tie bar 45. A mold clamping mechanism 47 is disposed between the pressure receiving plate and the movable platen 46. The mold 48 attached to the stationary platen 44 has two cavity forming surfaces 49 and 50 having different shapes. Also, the mold 51 attached to the movable platen 46 is formed with two cavity forming surfaces 52 and 53 having different shapes at the same position as the die 48 attached to the fixed platen 44.

固定側の金型48のキャビティ形成面49とキャビティ形成面50の間には射出された溶融樹脂を中間金型42内へ送る円筒状のホットランナブロック54が固定的に配置されている。そしてホットランナブロック54の溶融樹脂通路55の先端側は一側に向けて屈曲して、外周面56の一側に開口部57が形成されている。そして前記ホットランナブロック54の周囲には中央に前記ホットランナブロック54が挿通される内周孔58を有する円盤状の中間金型42が配設されている。中間金型42の固定側、可動側の両側の面には同一のキャビティ形成面59がそれぞれ2面づつ形成されている。そして型閉された際に中間金型42のキャビティ形成面59,59と固定金型側のキャビティ形成面49,50により、形状の異なる2個のキャビティが形成されるようになっている。また型閉された際に中間金型42のキャビティ形成面59,59と可動金型側のキャビティ形成面52,53により、形状の異なるキャビティが形成されるようになっている。そして中間金型42の内部にはキャビティ形成面59から内周孔58に向けてホットランナの溶融樹脂通路60が形成され、内周孔58の対向する2箇所に開口部61が設けられている。   Between the cavity forming surface 49 and the cavity forming surface 50 of the fixed-side mold 48, a cylindrical hot runner block 54 for sending the injected molten resin into the intermediate mold 42 is fixedly disposed. The front end side of the molten resin passage 55 of the hot runner block 54 is bent toward one side, and an opening 57 is formed on one side of the outer peripheral surface 56. Around the hot runner block 54, a disc-shaped intermediate mold 42 having an inner peripheral hole 58 through which the hot runner block 54 is inserted is disposed at the center. Two identical cavity forming surfaces 59 are formed on both the fixed and movable surfaces of the intermediate mold 42, respectively. When the mold is closed, two cavities having different shapes are formed by the cavity forming surfaces 59 and 59 of the intermediate mold 42 and the cavity forming surfaces 49 and 50 on the fixed mold side. When the mold is closed, cavities having different shapes are formed by the cavity forming surfaces 59 and 59 of the intermediate mold 42 and the cavity forming surfaces 52 and 53 on the movable mold side. Inside the intermediate mold 42, a hot runner molten resin passage 60 is formed from the cavity forming surface 59 toward the inner peripheral hole 58, and openings 61 are provided at two opposite positions of the inner peripheral hole 58. .

前記中間金型42の内周孔58とホットランナブロック54の外周面56の間は摺動自在となっており、中間金型42は型開閉方向に移動可能となっている。そして中間金型42が型開位置となった際に、ホットランナブロック54の開口部57と中間金型42の一側に位置する開口部61が接続されホットランナが連通されるようになっている。また中間金型42の内部の外周寄りには、二次キャビティに連設されるホットランナの溶融樹脂通路62が形成され、外周部63に開口部64が形成されている。また中間金型42の外周部63は、固定側の金型48から可動側の金型51側に向けて円筒状のガイド部材65が突出固定されている。そして中間金型42の外周部63は、前記ガイド部材65の内周面にガイドされている。ただし前記ガイド部材65は、後述する第2の射出装置66のノズル67が挿入される部分や、成形品の取出位置の部分には、開口が設けられている。   Between the inner peripheral hole 58 of the intermediate mold 42 and the outer peripheral surface 56 of the hot runner block 54 is slidable, and the intermediate mold 42 is movable in the mold opening / closing direction. When the intermediate mold 42 is in the mold open position, the opening 57 of the hot runner block 54 and the opening 61 located on one side of the intermediate mold 42 are connected so that the hot runner communicates. Yes. Near the inner periphery of the intermediate mold 42, a hot runner molten resin passage 62 connected to the secondary cavity is formed, and an opening 64 is formed in the outer periphery 63. A cylindrical guide member 65 projects and is fixed to the outer peripheral portion 63 of the intermediate mold 42 from the fixed mold 48 to the movable mold 51 side. The outer peripheral portion 63 of the intermediate mold 42 is guided by the inner peripheral surface of the guide member 65. However, the guide member 65 is provided with an opening in a portion where a nozzle 67 of a second injection device 66 described later is inserted or a portion where a molded product is taken out.

また図示は省略するが、前記ガイド部材65等には中間金型42のみを型開閉方向の軸75(仮想軸)を中心に回転または反転させる回転機構(移動機構)が取付けられている(ホットランナブロック54も同時に回転させる構造にしてもよい。)。また可動側の金型51の前端の複数個所には、中間金型42が型閉位置から型開されていく際に係合されるフック68が設けられ、中間金型42側にはその係合部69が設けられている。前記フック68等からなる機構は、中間金型42が型開位置に到達した時点で係合が解除され、可動側の金型51のみが更に型開されるようになっている。なお前記フック68に替えて別の機構を用いてもよく、縦型の型締装置の上型側から中間金型42を取付ける際は、フック68等の機構を用いないでもよい。   Although not shown, a rotation mechanism (moving mechanism) for rotating or reversing only the intermediate mold 42 around the axis 75 (virtual axis) in the mold opening / closing direction is attached to the guide member 65 and the like (hot). The runner block 54 may also be configured to rotate simultaneously. Further, hooks 68 that are engaged when the intermediate mold 42 is opened from the mold closing position are provided at a plurality of locations at the front end of the movable mold 51, and the intermediate mold 42 side has its engagement. A joint 69 is provided. The mechanism including the hook 68 is disengaged when the intermediate mold 42 reaches the mold opening position, and only the movable mold 51 is further opened. It should be noted that another mechanism may be used instead of the hook 68, and when the intermediate mold 42 is attached from the upper mold side of the vertical mold clamping device, the mechanism such as the hook 68 may not be used.

多材射出成形機40の固定盤44は、第1の射出装置70のノズル71が挿入される孔72が設けられている。そして固定盤44の反固定金型側には、ノズル71と加熱筒73が水平方向に配置された第1の射出装置70が進退自在に配設されている。また中間金型42を閉鎖した際に他側(反操作側)となる側方にはノズル67と加熱筒74が水平方向の配設される他の射出装置である第2の射出装置66が進退自在に配設されている。よって第1の射出装置70と第2の射出装置66は直交する方向に向けて配設されている。   The fixed plate 44 of the multi-material injection molding machine 40 is provided with a hole 72 into which the nozzle 71 of the first injection device 70 is inserted. A first injection device 70 in which a nozzle 71 and a heating cylinder 73 are arranged in the horizontal direction is disposed on the side of the fixed platen 44 opposite to the fixed mold so as to be able to advance and retreat. Further, a second injection device 66, which is another injection device in which the nozzle 67 and the heating cylinder 74 are disposed in the horizontal direction, is provided on the side that becomes the other side (reverse operation side) when the intermediate mold 42 is closed. It is arranged to be able to advance and retreat. Therefore, the first injection device 70 and the second injection device 66 are arranged in the orthogonal direction.

次に図4に示される別の実施形態の多材射出成形機40の多材射出成形方法について説明する。多材射出成形機40の多材射出成形方法も基本的には先に本実施形態の多材射出成形機10の多材射出成形方法と同様である。一次成形位置S1で型開閉方向に重なる位置に複数形成された一次キャビティに対して第1の射出装置70から射出を行い、冷却させて同時に2個の一次成形品を成形する。その後型開してから中間金型42のみを型開閉方向の軸75(仮想軸)を中心に回転させて、中間金型42のキャビティ形成面59,59に保持された一次成形品を同時に二次成形側に移動させる。すなわち別の実施形態では、中間金型42は移動されずにそのキャビティ59,59が軸75を中心に型開閉方向と直交する方向に一次成形位置S1から二次成形位置S2へ移動される。そして再度型閉および型締して型開閉方向に重なる位置に複数形成された他のキャビティである二次キャビティに対して第2の射出装置66から再び射出を行い、冷却させて同時に2個の多材成形品(完成品)を成形する。その際同時に、二次成形位置S2から一次成形位置S1へ空の状態で移動させた中間金型42のキャビティ形成面59、59は、一次成形位置S1で再び金型48のキャビティ形成面49および金型51のキャビティ形成面52と共に2個の一次キャビティを形成して次の一次成形品の成形を行う。そして再び型開が行われ、二次成形品の取出しと、一次成形品の移動を繰り返す。   Next, a multi-material injection molding method of the multi-material injection molding machine 40 of another embodiment shown in FIG. 4 will be described. The multi-material injection molding method of the multi-material injection molding machine 40 is basically the same as the multi-material injection molding method of the multi-material injection molding machine 10 of the present embodiment. A plurality of primary cavities formed at positions overlapping in the mold opening / closing direction at the primary molding position S1 are injected from the first injection device 70 and cooled to simultaneously form two primary molded products. Thereafter, after the mold is opened, only the intermediate mold 42 is rotated around the axis 75 (virtual axis) in the mold opening / closing direction, and the primary molded product held on the cavity forming surfaces 59 and 59 of the intermediate mold 42 is simultaneously removed. Move to the next molding side. That is, in another embodiment, the intermediate mold 42 is not moved and its cavities 59, 59 are moved from the primary molding position S1 to the secondary molding position S2 in the direction perpendicular to the mold opening / closing direction around the shaft 75. Then, the second injection device 66 re-injects the secondary cavities, which are other cavities formed in a position overlapping with the mold opening and closing direction by closing the mold and clamping again, and cooling them to simultaneously cool the two cavities. A multi-material molded product (finished product) is molded. At the same time, the cavity forming surfaces 59 and 59 of the intermediate mold 42 moved in an empty state from the secondary molding position S2 to the primary molding position S1 are again formed at the primary molding position S1. Two primary cavities are formed together with the cavity forming surface 52 of the mold 51 to form the next primary molded product. Then, the mold is opened again, and the removal of the secondary molded product and the movement of the primary molded product are repeated.

次に図5ないし図7に示される本発明の更に別の実施形態の多材射出成形機80について説明する。更に別の実施形態の多材射出成形機80は、縦型射出成形機の型締装置81には、第1の盤である上盤82には1個の金型83が取付けられ、前記金型83には一面のキャビティ形成面84が形成されている。また第2の盤である下盤85には1個の金型86が取付けられ、前記金型86には一面のキャビティ形成面87が形成されている。そして第1の盤である上盤82と第2の盤である下盤85の間には中間盤88が図示しない移動機構であるシリンダにより少なくとも型開閉方向と直交する方向の一側と他側の間で往復移動自在に取付けられている。また中間盤88は、上盤82および/または下盤85の型開閉移動とともに型開閉方向にも移動可能となっている。   Next, a multi-material injection molding machine 80 according to still another embodiment of the present invention shown in FIGS. 5 to 7 will be described. In a multi-material injection molding machine 80 according to yet another embodiment, a mold 83 is attached to a mold clamping device 81 of a vertical injection molding machine and an upper board 82 as a first board, and the mold The mold 83 has a single cavity forming surface 84 formed thereon. In addition, one die 86 is attached to the lower plate 85 which is the second plate, and a single cavity forming surface 87 is formed on the die 86. Between the upper board 82 as the first board and the lower board 85 as the second board, the intermediate board 88 is at least one side and the other side in the direction orthogonal to the mold opening / closing direction by a cylinder (not shown). It is attached so that reciprocation is possible. The intermediate board 88 can be moved in the mold opening / closing direction together with the mold opening / closing movement of the upper board 82 and / or the lower board 85.

そして中間盤88の上面の一側と他側には、2個の中間金型89,90が上盤82の金型83と対向可能に取付けられている。そして前記中間金型89,90には成形位置に位置した際に金型83とキャビティ形成面84と対向するキャビティ形成面91,92がそれぞれ形成されている。なお前記キャビティ形成面91,92は、それぞれ形状が異なっている。また中間盤88の下面の一側と他側には、2個の中間金型93,94が下盤85の金型86と対向可能に取付けられている。そして前記中間金型93には成形位置に位置した際に金型86とキャビティ形成面87と対向するキャビティ形成面95,96がそれぞれ形成されている。なお前記キャビティ形成面95,96は、それぞれ形状が異なっている。従ってキャビティ形成面84とキャビティ形成面91により形成される一次キャビティC1と、金型83と中間金型90の間に形成される他のキャビティである二次キャビティC2とでは形状が異なっている。また型開閉方向に同じ位置に取付けられる中間金型89,93(または中間金型90,94)のキャビティ形成面91,95同士(またはキャビティ形成面92,96同士)は、同じ形状となっている。なお中間盤88の上面および下面にそれぞれ複数のキャビティ形成面を有する1面の金型を設けてもよい。また中間盤88を配設せずに、移動機構により移動可能な中間金型の両面に複数のキャビティ形成面を形成するようにしてもよい。   Two intermediate molds 89 and 90 are attached to one side and the other side of the upper surface of the intermediate board 88 so as to face the mold 83 of the upper board 82. The intermediate molds 89 and 90 are respectively formed with cavity forming surfaces 91 and 92 that face the mold 83 and the cavity forming surface 84 when positioned at the molding position. The cavity forming surfaces 91 and 92 have different shapes. Two intermediate molds 93 and 94 are attached to one side and the other side of the lower surface of the intermediate board 88 so as to be opposed to the mold 86 of the lower board 85. The intermediate mold 93 is formed with cavity forming surfaces 95 and 96 facing the mold 86 and the cavity forming surface 87 when positioned at the molding position. The cavity forming surfaces 95 and 96 have different shapes. Accordingly, the primary cavity C1 formed by the cavity forming surface 84 and the cavity forming surface 91 is different in shape from the secondary cavity C2 which is another cavity formed between the mold 83 and the intermediate mold 90. Further, the cavity forming surfaces 91 and 95 (or the cavity forming surfaces 92 and 96) of the intermediate molds 89 and 93 (or the intermediate molds 90 and 94) attached at the same position in the mold opening / closing direction have the same shape. Yes. Note that a single die having a plurality of cavity forming surfaces may be provided on the upper surface and the lower surface of the intermediate plate 88, respectively. Further, a plurality of cavity forming surfaces may be formed on both surfaces of the intermediate mold movable by the moving mechanism without providing the intermediate plate 88.

また型締装置81の一側には前記一次キャビティC1に接続される第1の射出装置97が設けられ、型締装置81の他側には前記二次キャビティC2に接続される他の射出装置である第2の射出装置98が設けられている。それぞれ第1の射出装置97および第2の射出装置98のノズルは中間盤88の側面に当接され、それぞれホットランナを介して前記一次キャビティC1および二次キャビティC2に溶融樹脂が射出される。   Further, a first injection device 97 connected to the primary cavity C1 is provided on one side of the mold clamping device 81, and another injection device connected to the secondary cavity C2 on the other side of the mold clamping device 81. A second injection device 98 is provided. The nozzles of the first injection device 97 and the second injection device 98 are in contact with the side surfaces of the intermediate plate 88, respectively, and the molten resin is injected into the primary cavity C1 and the secondary cavity C2 through hot runners, respectively.

次に本発明の更に別の実施形態の多材射出成形機80の多材射出成形方法について説明する。まず図5に示されるように、中間盤88を他側に向けて移動させてから型締を行い、一側の中間金型89と金型83、一側の中間金型93と金型86との間にそれぞれ一次キャビティC1,C1を形成する。そして第1の射出装置97から前記一次キャビティC1,C1に対して射出を行い一次成形品P1を成形する。その後に型開を行う際に、一次形成品P1は、金型83のキャビティ形成面84および金型86のキャビティ形成面87に保持されて型開が行われる。この際の型開量はごく僅かでよいのでサイクル短縮が図れる。そして図6に示されるように図示しない移動手段により中間盤88を他側から一側に向けて型開閉方向と直交する方向に移動させる。   Next, a multi-material injection molding method of the multi-material injection molding machine 80 according to still another embodiment of the present invention will be described. First, as shown in FIG. 5, the intermediate plate 88 is moved toward the other side, and then the mold clamping is performed, and the intermediate mold 89 and the mold 83 on one side, the intermediate mold 93 and the mold 86 on one side are performed. Primary cavities C1 and C1 are respectively formed between the two. Then, injection is performed from the first injection device 97 to the primary cavities C1 and C1 to form a primary molded product P1. Thereafter, when the mold is opened, the primary product P1 is held on the cavity forming surface 84 of the mold 83 and the cavity forming surface 87 of the mold 86, and the mold is opened. In this case, the amount of mold opening is very small, so that the cycle can be shortened. Then, as shown in FIG. 6, the intermediate plate 88 is moved from the other side to one side by a moving means (not shown) in a direction orthogonal to the mold opening / closing direction.

その後再び型締を行い、他側の中間金型90と一次成形品P1の間(中間金型90と金型83の間)、他側の中間金型94と一次成形品P1の間(中間金型94と金型86の間)にそれぞれ二次キャビティC2,C2を形成する。そして第2の射出装置98から前記二次キャビティC2,C2に対して射出を行い多材成形品P2を成形する。その後に型開を行うが多材成形品P2はどちらのキャビティ形成面84,92(またはキャビティ形成面87,96)に保持されたものでもよい。そして図示しない取出機により多材成形品P2を取出す。そして再度中間盤88を一側に向けて移動させ、再び一次成形を行う。本実施形態ではスタックモールド構造により、同時に複数の多材成形品P2を成形することが可能であり、生産効率がよい。なお図5ないし図7に示される実施形態も金型内の駒の移動によりキャビティ形状を変更する手段を併用したものでもよい。   Thereafter, the mold is clamped again, and between the intermediate mold 90 on the other side and the primary molded product P1 (between the intermediate mold 90 and the mold 83) and between the intermediate mold 94 on the other side and the primary molded product P1 (intermediate). Secondary cavities C2 and C2 are formed between the mold 94 and the mold 86, respectively. Then, the second injection device 98 performs injection to the secondary cavities C2 and C2 to form a multi-material molded product P2. Thereafter, the mold is opened, but the multi-material molded product P2 may be held by any of the cavity forming surfaces 84 and 92 (or the cavity forming surfaces 87 and 96). And the multi-material molded product P2 is taken out by an unillustrated take-out machine. Then, the intermediate plate 88 is moved again toward one side, and primary molding is performed again. In the present embodiment, it is possible to simultaneously mold a plurality of multi-material molded products P2 by the stack mold structure, and the production efficiency is good. 5 to 7 may be used in combination with means for changing the cavity shape by moving the pieces in the mold.

本発明に使用される樹脂は、同一樹脂(異色および同色)および異なる樹脂に限定されず、多材により成形される様々な形状の多材成形品全般の成形に用いることが可能である。特にはアクリル製ガラス、車輌用樹脂窓材、テレビの外枠、ヘッドライト用レンズ、およびテールライト用レンズ等の成形に有効に用いられる。   The resin used in the present invention is not limited to the same resin (different colors and the same color) and different resins, and can be used for molding various general molded products having various shapes formed by multiple materials. In particular, it is effectively used for molding acrylic glass, vehicle resin window materials, television outer frames, headlight lenses, taillight lenses, and the like.

10,40,80 多材射出成形機
11,41,81 型締装置
12 下固定盤(第1の盤)
13 上可動盤(第2の盤)
14,15,21,22,48,51,83,86 金型
16,17,23,24,28,49,50,52,53,59,84,87,91,92,95,96 キャビティ形成面
25,88 中間盤
26 回転軸
27,42,89,90,93,94 中間金型
29 回転機構(移動機構)
31,70,97 第1の射出装置
32,66,98 第2の射出装置
C1 一次キャビティ
C2 二次キャビティ
P1 一次成形品
P2 多材成形品
S1 一次成形位置
S2 二次成形位置
10, 40, 80 Multi-material injection molding machine 11, 41, 81 Clamping device 12 Lower fixed platen (first plate)
13 Upper movable board (second board)
14, 15, 21, 22, 48, 51, 83, 86 Mold 16, 17, 23, 24, 28, 49, 50, 52, 53, 59, 84, 87, 91, 92, 95, 96 Cavity formation Surface 25, 88 Intermediate plate 26 Rotating shaft 27, 42, 89, 90, 93, 94 Intermediate mold 29 Rotating mechanism (moving mechanism)
31, 70, 97 First injection device 32, 66, 98 Second injection device C1 Primary cavity C2 Secondary cavity P1 Primary molded product P2 Multi-material molded product S1 Primary molding position S2 Secondary molding position

Claims (5)

一次成形した一次成形品に少なくとも二次成形を行う多材射出成形機において、
第1の盤に取付けられる金型と、
第2の盤に取付けられる金型と、
前記第1の盤に取付けられる金型と前記第2の盤に取付けられる金型との間に配設される中間金型と、
中間金型またはそのキャビティを少なくとも型開閉方向と直交する方向に移動させる移動機構と、
前記第1の盤に取付けられる金型および中間金型の間と第2の盤に取付けられる金型および中間金型の間にそれぞれ形成される複数の一次キャビティに射出を行う第1の射出装置と、
前記第1の盤に取付けられる金型および中間金型の間と第2の盤に取付けられる金型と中間金型の間にそれぞれ形成され前記一次キャビティと形状の異なる複数の他のキャビティに射出を行う前記第1の射出装置以外の他の射出装置と、が備えられたことを特徴とする多材射出成形機。
In a multi-material injection molding machine that performs at least secondary molding on a primary molded product that has been primary molded,
A mold attached to the first board;
A mold attached to the second board;
An intermediate mold disposed between a mold attached to the first board and a mold attached to the second board;
A moving mechanism for moving the intermediate mold or its cavity at least in a direction perpendicular to the mold opening and closing direction;
A first injection device that performs injection into a plurality of primary cavities formed between a mold and an intermediate mold attached to the first board and between a mold and an intermediate mold attached to the second board, respectively. When,
Injection into a plurality of other cavities formed between the mold and the intermediate mold attached to the first board and between the mold and the intermediate mold attached to the second board and having different shapes from the primary cavity. A multi-material injection molding machine comprising: an injection device other than the first injection device that performs the operation.
型開閉方向に設けられた回転軸を中心に回転または反転される中間盤が配設され、
前記中間盤の両面にそれぞれ複数の中間金型とそのキャビティ形成面が配設されたことを特徴とする請求項1に記載の多材射出成形機。
An intermediate plate that is rotated or reversed about a rotation axis provided in the mold opening and closing direction is disposed,
2. The multi-material injection molding machine according to claim 1, wherein a plurality of intermediate molds and their cavity forming surfaces are disposed on both surfaces of the intermediate plate.
型開閉方向に設けられた回転軸を中心に回転または反転される中間金型が配設され、
前記中間金型の両面にそれぞれ複数のキャビティ形成面が配設されたことを特徴とする請求項1に記載の多材射出成形機。
An intermediate mold that is rotated or reversed about a rotation axis provided in the mold opening / closing direction is disposed,
The multi-material injection molding machine according to claim 1, wherein a plurality of cavity forming surfaces are disposed on both surfaces of the intermediate mold.
前記第1の盤と第2の盤は上下方向に配設され、上下方向に型開閉がなされる縦型射出成形機であることを特徴とする請求項1ないし請求項3のいずれか1項に記載の多材射出成形機。 4. The vertical injection molding machine according to claim 1, wherein the first board and the second board are arranged in a vertical direction and are opened and closed in a vertical direction. 5. Multi-material injection molding machine described in 1. 一次成形した一次成形品に少なくとも二次成形を行う多材射出成形方法において、
第1の盤に取付けられる金型と、
第2の盤に取付けられる金型と、
前記第1の盤に取付けられる金型と前記第2の盤に取付けられる金型との間に配設される中間金型と、
中間金型またはそのキャビティを少なくとも型開閉方向と直交する方向に移動させる移動機構と、
第1の射出装置と、
前記第1の射出装置以外の他の射出装置とが備えられ、
前記第1の盤に取付けられる金型および中間金型の間と第2の盤に取付けられる金型および中間金型の間に形成される複数の一次キャビティに前記第1の射出装置から射出を行い複数の一次成形品を成形した後、
前記第1の盤に取付けられる金型および中間金型の間と第2の盤に取付けられる金型と中間金型の間にそれぞれ形成され前記一次成形品に接続される複数の他のキャビティに前記他の射出装置から射出を行い複数の多材成形品を成形することを特徴とする多材射出成形方法。
In the multi-material injection molding method of performing at least secondary molding on the primary molded product that has been primary molded,
A mold attached to the first board;
A mold attached to the second board;
An intermediate mold disposed between a mold attached to the first board and a mold attached to the second board;
A moving mechanism for moving the intermediate mold or its cavity at least in a direction perpendicular to the mold opening and closing direction;
A first injection device;
Other injection devices other than the first injection device,
Injection from the first injection device into a plurality of primary cavities formed between the mold and intermediate mold attached to the first board and between the mold and intermediate mold attached to the second board After forming multiple primary molded products,
A plurality of other cavities formed between the mold and the intermediate mold attached to the first board and between the mold and the intermediate mold attached to the second board and connected to the primary molded product; A multi-material injection molding method, wherein a plurality of multi-material molded products are molded by injection from the other injection device.
JP2009212581A 2009-09-15 2009-09-15 Multi-material injection molding machine and multi-material injection molding method Pending JP2011056927A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5901822B1 (en) * 2015-05-18 2016-04-13 スギヤマプラスチック株式会社 Resin injection molding method and resin injection molding apparatus
CN107756745A (en) * 2017-11-12 2018-03-06 磐石油压工业(安徽)有限公司 A kind of rubber injection molding equipment of multidirectional injection material
KR102149026B1 (en) * 2019-12-11 2020-08-27 유호종 Double injection mold equipped with 2 sliding core
CN113650229A (en) * 2021-08-26 2021-11-16 广州城市理工学院 Injection molding control method of injection molding device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5901822B1 (en) * 2015-05-18 2016-04-13 スギヤマプラスチック株式会社 Resin injection molding method and resin injection molding apparatus
CN107756745A (en) * 2017-11-12 2018-03-06 磐石油压工业(安徽)有限公司 A kind of rubber injection molding equipment of multidirectional injection material
KR102149026B1 (en) * 2019-12-11 2020-08-27 유호종 Double injection mold equipped with 2 sliding core
CN113650229A (en) * 2021-08-26 2021-11-16 广州城市理工学院 Injection molding control method of injection molding device
CN113650229B (en) * 2021-08-26 2023-06-30 广州城市理工学院 Injection control method of injection molding device

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