JP2003164316A - Housing case and production method thereof - Google Patents
Housing case and production method thereofInfo
- Publication number
- JP2003164316A JP2003164316A JP2001367723A JP2001367723A JP2003164316A JP 2003164316 A JP2003164316 A JP 2003164316A JP 2001367723 A JP2001367723 A JP 2001367723A JP 2001367723 A JP2001367723 A JP 2001367723A JP 2003164316 A JP2003164316 A JP 2003164316A
- Authority
- JP
- Japan
- Prior art keywords
- wall
- storage case
- parison
- storage
- elastic modulus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/20—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
- B29C2049/2008—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements inside the article
Landscapes
- Purses, Travelling Bags, Baskets, Or Suitcases (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、各種電子機器、計
測機器、光学機器等のように、精密で機械的振動や衝撃
を避けなければならない物品を収納し、安全に保管、携
帯することができるプラスチック製の収納ケースおよび
その製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is capable of accommodating, safely storing and carrying articles such as various electronic equipments, measuring equipments, optical equipments, etc., which are precise and must avoid mechanical vibration and impact. The present invention relates to a plastic storage case and a manufacturing method thereof.
【０００２】[0002]
【従来技術】ビデオカメラ、パーソナルコンピュータ、
ワードプロセッサ、電子楽器等の各種電子機器、 計測
機器、光学機器等のように、 振動や衝撃を避ける必要
がある物品を収納して保管し、携帯するためのプラスチ
ック製の収納ケースは、種々のものがあり、そのうちで
ケース内部に電子機器等の収納リセスを形成し、収納リ
セス全体に発泡プラスチック等の緩衝材を嵌込み、その
内面をウレタンフォームで覆ったものは、特開昭５８−
９３８７号公報に記載されている。また、収納リセスの
一部に緩衝材を嵌込んで内面を表皮シートで覆ったもの
は、実開昭６４−３９２１８号公報に記載されている。
また、中空二重壁構造を成す収納リセスの中空部に発泡
体を発泡体を充密させた収納ケースは、特開２０００−
２８１０３６号公報に記載されている。2. Description of the Related Art Video cameras, personal computers,
There are various plastic storage cases for storing and carrying items that need to be protected from vibrations and impacts, such as word processors, electronic instruments such as electronic musical instruments, measuring instruments, and optical instruments. JP-A-58-58
It is described in Japanese Patent No. 9387. Further, the one in which a cushioning material is fitted in a part of the storage recess and the inner surface is covered with a skin sheet is described in Japanese Utility Model Laid-Open No. 64-39218.
Further, a storage case in which a foam is densely packed in a hollow portion of a storage recess having a hollow double-walled structure is disclosed in JP-A-2000-
No. 281036.
【０００３】[0003]
【発明が解決しようとする課題】ところで、特に緩衝性
を要求される収納ケースは、特開昭５８−９３８７号公
報に記載されているように、一重壁構造の収納リセスの
内面をウレタンフォームで形成したものや、実開昭６４
−３９２１８号公報に記載されているように、二重壁構
造の収納リセスの内面に緩衝材を嵌め込んでその上を表
皮シートで覆ったものでは、収納リセスの全体または一
部が緩衝材で構成されているとしても、緩衝材を充満し
た部分がケースを構成する壁自体でないうえ封じられた
中空二重壁構造でないので、衝撃に対する緩衝性が十分
でなく、特にケースの一部に強い衝撃が集中して加わっ
た場合において、その部分に凹みが生じてしまい、かか
る衝撃に対する収納物品の保護性に劣ることが判明して
いる。By the way, as for a storage case which is required to have a shock absorbing property, as described in JP-A-58-9387, the inner surface of the storage recess having a single wall structure is made of urethane foam. Formed and actual development 64
As described in JP-A-39218, in the one in which a cushioning material is fitted on the inner surface of the storage recess of the double wall structure and is covered with a skin sheet, the whole or a part of the storage recess is a cushioning material. Even if it is configured, since the part filled with cushioning material is not the wall itself that constitutes the case nor the enclosed hollow double wall structure, it does not have sufficient cushioning against impacts, especially strong impact on part of the case It has been found that, when a large amount of water is added in a concentrated manner, a recess is formed in that portion, and the protection of the stored article against such impact is poor.
【０００４】また、特開２０００−２８１０３６号公報
に記載されているものでは、収納リセスの中空部に発泡
体を充密させているが、収納リセスを構成するプラスチ
ック材料の曲げ弾性率とその中空部に充密させる発泡体
の圧縮弾性率または密度との関係によっては、所期の緩
衝性が得られず、収納物品の保護性に欠けることが判明
した。In Japanese Patent Laid-Open No. 2000-281036, the foam is filled in the hollow portion of the storage recess. However, the bending elastic modulus of the plastic material forming the storage recess and the hollow thereof. It was found that the desired cushioning property was not obtained depending on the relationship with the compression modulus or density of the foam to be filled in the part, and the protective property of the stored article was lacking.
【０００５】そこで、本発明は、かかる問題点を解決し
ようとするものであって、本体または蓋体を曲げ弾性率
が１００〜６００ＭＰａのプラスチックで形成し、かつ
その内壁および外壁の肉厚をそれぞれ０．２〜５．０ｍ
ｍとし、また、外壁の曲げ弾性率を内壁の曲げ弾性率よ
り大きいプラスチックで構成し、さらに、外壁の肉厚を
内壁の肉厚より厚く形成することにより、収納リセスの
中空部内に発泡体を内装することと相俟って、収納リセ
スの緩衝性を大きく向上させて、収納物品の保護性に優
れた収納ケースを提供することを目的とする。Therefore, the present invention is intended to solve such a problem, in which the main body or the lid is made of plastic having a bending elastic modulus of 100 to 600 MPa, and the wall thicknesses of the inner wall and the outer wall thereof are respectively different. 0.2-5.0m
m, the outer wall is made of a plastic having a bending elastic modulus higher than that of the inner wall, and the outer wall is made thicker than the inner wall to form a foam in the hollow portion of the storage recess. An object of the present invention is to provide a storage case that has a significantly improved cushioning property of the storage recess in combination with the interior, and is excellent in the protection of the stored items.
【０００６】そのうえ、本発明は、一対のシート状パリ
ソンの一方のパリソンを他方のパリソンと異なる曲げ弾
性率の熱可塑性樹脂により構成することにより、収納物
品の保護性に優れた収納ケースをブロー成形により製造
する方法を提供することを目的とする。Further, according to the present invention, one of the pair of sheet-shaped parisons is made of a thermoplastic resin having a bending elastic modulus different from that of the other parison, so that a storage case excellent in protection of stored articles is blow-molded. It aims at providing the method manufactured by.
【０００７】[0007]
【課題を解決するための手段】本発明に係る収納ケース
は、請求項１に記載したように、本体と蓋体から成り、
かつそのうちの少なくとも一方が外壁と内壁とを対向さ
せてその間に中空部を有する中空二重壁構造であって、
中空二重壁構造の内壁に１つまたは複数の収納リセスを
形成して成るプラスチック製の収納ケースにおいて、本
体または蓋体を曲げ弾性率が１００〜６００ＭＰａのプ
ラスチックで形成するとともに、内壁と外壁の曲げ弾性
率または肉厚の値を異なるものとし、かつその内壁およ
び外壁の肉厚をそれぞれ０．２〜５．０ｍｍとし、少な
くとも本体または蓋体の収納リセスの中空部内に、発泡
体を充填してなることを特徴とするものである。A storage case according to the present invention comprises a main body and a lid, as described in claim 1,
And at least one of them is a hollow double-wall structure having an outer wall and an inner wall facing each other and having a hollow portion therebetween,
In a storage case made of plastic in which one or a plurality of storage recesses are formed on the inner wall of a hollow double-wall structure, the main body or lid is made of plastic having a bending elastic modulus of 100 to 600 MPa, and the inner wall and the outer wall are The bending elastic modulus or the wall thickness is different, and the wall thickness of the inner wall and the outer wall is 0.2 to 5.0 mm, and at least the hollow portion of the housing recess of the main body or the lid is filled with the foam. It is characterized by
【０００８】また、本発明に係る収納ケースは、請求項
２に記載したように、請求項１の構成において、内壁の
曲げ弾性率を外壁の曲げ弾性率より小さいプラスチック
で構成したことを特徴とするものである。Further, as described in claim 2, the storage case according to the present invention is characterized in that, in the structure of claim 1, the storage case is made of plastic whose bending elastic modulus of the inner wall is smaller than that of the outer wall. To do.
【０００９】本発明に係る収納ケースは、請求項３に記
載したように、請求項１または２の構成において、外壁
の肉厚を内壁の肉厚より厚く形成したことを特徴とする
ものである。As described in claim 3, the storage case according to the present invention is characterized in that, in the structure of claim 1 or 2, the thickness of the outer wall is formed thicker than the thickness of the inner wall. .
【００１０】本発明に係る収納ケースは、請求項４に記
載したように、請求項１、２または３の構成において、
中空部内に内装した発泡体の圧縮強度を０．０２〜０．
０７Ｋｇ／ｃｍ2または密度を０．０１５〜０．０３ｇ
／ｃｍ3としたことを特徴とするものである。As described in claim 4, the storage case according to the present invention has the structure of claim 1, 2 or 3.
The compressive strength of the foamed material installed in the hollow part is 0.02 to 0.
07Kg / cm 2 or density 0.015-0.03g
/ Cm 3 is a feature.
【００１１】本発明に係る収納ケースは、請求項５に記
載したように、請求項１、２、３または４の構成におい
て、発泡体を内装した収納リセスに１つまたは複数のエ
ア抜き孔を設けたことを特徴とするものである。As described in claim 5, the storage case according to the present invention has the configuration of claim 1, 2, 3 or 4 in which one or a plurality of air vent holes are formed in the storage recess containing the foam. It is characterized by being provided.
【００１２】さらに、本発明に係る収納ケースの製造方
法は、は、請求項６に記載したように、一方および他方
の金型から成る分割金型間に押出ヘッドから一対のシー
ト状のパリソンを垂下して、それぞれのパリソンを対向
する分割金型のキャビティに密着させて中空二重壁構造
の内外壁をそれぞれ形成するとともに内外壁のうち一方
の壁となるパリソンの収納リセスと対応する部位に発泡
体を配置して分割金型を型締めし、キャビティ周囲を互
いに密着させて、次いで閉じたシート状パリソンの内部
に圧力流体を導入することにより発泡体を内装した収納
ケースのブロー成形方法において、一対のシート状パリ
ソンの一方のパリソンを他方のパリソンと異なる曲げ弾
性率の熱可塑性樹脂により構成することを特徴とするも
のである。Further, in the method of manufacturing a storage case according to the present invention, as described in claim 6, a pair of sheet-like parisons is provided from the extrusion head between the split molds including the one mold and the other mold. It hangs down, and each parison is brought into close contact with the cavities of the opposing split molds to form the inner and outer walls of the hollow double-walled structure, respectively, and at the part corresponding to the storage recess of the parison which is one of the inner and outer walls. In a blow molding method of a storage case in which a foam is installed by placing a foam, clamping the divided molds, closely adhering the peripheries of the cavities to each other, and then introducing a pressure fluid into the closed sheet-shaped parison. One of the pair of sheet parisons is made of a thermoplastic resin having a bending elastic modulus different from that of the other parison.
【００１３】[0013]
【発明の実施の形態】図１は本発明に係る収納ケースの
全体斜視図、図２は図１の収納ケースを開いて示す正面
図、図３は図２のＡ−Ａ線断面図である。また、図４は
分割金型を開いて押出ヘッドから筒状のパリソンを垂下
した工程を示す断面図、図５は分割金型を型締めしてブ
ロー成形し、かつ発泡体を内装した工程を示す断面図で
ある。1 is an overall perspective view of a storage case according to the present invention, FIG. 2 is a front view showing the storage case of FIG. 1 in an open state, and FIG. 3 is a sectional view taken along the line AA of FIG. . Further, FIG. 4 is a cross-sectional view showing a process in which the split mold is opened and a cylindrical parison is hung from the extrusion head, and FIG. 5 shows a process in which the split mold is clamped and blow-molded, and a foam is incorporated. It is sectional drawing shown.
【００１４】図１ないし図３において、収納ケース１
は、プラスチック製で本体２と蓋体３から成り、ヒンジ
４によって開閉自在である。本体２は中空二重壁構造で
あり、その内部には収納物品を収納する収納リセス５が
形成されている。蓋体２も中空二重壁構造であり、その
内部には収納物品の収納リセス６が形成されている。７
は中空部である。収納ケース１を構成する本体２または
蓋体３は、曲げ弾性率１００〜６００ＭＰａのプラスチ
ックで形成されている。本体２および蓋体３の内壁およ
び外壁の肉厚はそれぞれ０．２〜５．０ｍｍとしてい
る。これら曲げ弾性率１００〜６００ＭＰａおよび肉厚
は、上記範囲内において特定の値またはさらに絞った範
囲内の値を選定して実施するものとする。なお、本体２
および蓋体３の内壁の曲げ弾性率を外壁の曲げ弾性率よ
り小さくし、外壁の肉厚を内壁の肉厚より厚く構成する
ことが好ましい。1 to 3, the storage case 1 is shown.
Is made of plastic and includes a main body 2 and a lid body 3, and can be opened and closed by a hinge 4. The main body 2 has a hollow double-walled structure, and a storage recess 5 for storing stored items is formed inside the main body 2. The lid body 2 also has a hollow double-wall structure, and a storage recess 6 for storing stored articles is formed therein. 7
Is a hollow part. The main body 2 or the lid 3 forming the storage case 1 is made of plastic having a bending elastic modulus of 100 to 600 MPa. The inner wall and the outer wall of the main body 2 and the lid 3 have a wall thickness of 0.2 to 5.0 mm, respectively. Regarding the bending elastic modulus of 100 to 600 MPa and the wall thickness, a specific value within the above range or a value within a further narrowed range is selected and implemented. The main body 2
Further, it is preferable that the bending elastic modulus of the inner wall of the lid 3 is made smaller than the bending elastic modulus of the outer wall, and the wall thickness of the outer wall is made thicker than the wall thickness of the inner wall.
【００１５】本体２の収納リセス５は、略方形凹状を成
しており、この収納リセス５の内面には、その一部と他
部ごとに、すなわち底面５ａから内側面５ｂ対応した中
空部７には、圧縮強度が０．０２〜０．０７Ｋｇ／ｃｍ
2または密度が０．０１５〜０．０３ｇ／ｃｍ3の発泡体
８を充填してある。この発泡体８の圧縮強度または密度
は、上記範囲内において特定の値またはさらに絞った範
囲内の値を選定して実施するものとする。The housing recess 5 of the main body 2 has a substantially rectangular concave shape, and the inside surface of the housing recess 5 is partially and separately, that is, a hollow portion 7 corresponding to the bottom surface 5a to the inner surface 5b. Has a compressive strength of 0.02-0.07 Kg / cm
2 or a foam 8 having a density of 0.015 to 0.03 g / cm 3 is filled. The compressive strength or density of the foam 8 is selected from a specific value within the above range or a value within a further narrowed range.
【００１６】ここで圧縮強度とは、圧縮によって破壊し
ない材料において規定のひずみの値における荷重を原断
面積で除した値であって、はじめの厚さの２５％を圧縮
した時に要する最大荷重によって算出された値である。
本発明おいて発泡体の圧縮強度は、試験片５０×３００
×３００（ｍｍ）を２００φの加圧円板を用いて元厚の
２５％圧縮時の荷重値を測定し、原断面積で除した値に
よって求められる。Here, the compressive strength is a value obtained by dividing a load at a specified strain value by an original cross-sectional area in a material which is not broken by compression, and is a maximum load required when 25% of the initial thickness is compressed. This is the calculated value.
In the present invention, the compressive strength of the foam is 50 × 300 for the test piece.
It is determined by the value obtained by measuring the load value at 25% compression of the original thickness of × 300 (mm) using a pressure disc of 200φ and dividing by the original cross-sectional area.
【００１７】上記のように発泡体８を充填した収納リセ
ス５の開口側端面には、複数のエア抜き孔９が設けられ
ている。このエア抜き孔９は、収納リセス５の中空部７
を外気に通じさせて、収納リセス５の緩衝変形に伴って
内圧が上昇しないようにするためのものである。エア抜
き孔９は複数でなく１つだけでもよい。A plurality of air vent holes 9 are provided on the end face on the opening side of the storage recess 5 filled with the foam 8 as described above. The air vent hole 9 is formed in the hollow portion 7 of the storage recess 5.
To allow the internal pressure to rise due to buffer deformation of the storage recess 5. The number of the air vent holes 9 may be one instead of plural.
【００１８】本発明に係る収納ケース１は、その本体２
および蓋体３が曲げ弾性率１００〜６００ＭＰａのプラ
スチックで、かつ内壁と外壁の肉厚をそれぞれ０．２〜
５．０ｍｍとしているので、収納リセス５の緩衝性が大
きく向上し、収納物品の保護性に優れたものとなる。そ
して、外壁の曲げ弾性率を内壁の曲げ弾性率より大きい
プラスチックで構成したり、また、外壁の肉厚を内壁の
肉厚より厚く形成することにより、収納リセス５の緩衝
性をいっそう向上させることができる。The storage case 1 according to the present invention comprises a main body 2 thereof.
And the lid 3 is made of plastic having a bending elastic modulus of 100 to 600 MPa, and the wall thickness of the inner wall and the outer wall is 0.2 to
Since it is set to 5.0 mm, the cushioning property of the storage recess 5 is greatly improved, and the protection property of the stored article is excellent. Further, the cushioning property of the storage recess 5 is further improved by forming the outer wall bending elastic modulus from a plastic material larger than the inner wall bending elastic modulus, or by forming the outer wall thickness thicker than the inner wall thickness. You can
【００１９】本発明において収納ケース１を構成する熱
可塑性プラスチックは、ポリオレフィン系樹脂（ポリエ
チレン樹脂、ポリプロピレン樹脂など）、ポリアミド系
樹脂（ナイロンなど）、ポリエステル系樹脂（ポリエチ
レンテレフタート、ポリブチレンテレフタートなど）、
スチレン系樹脂（ＡＢＳ樹脂、ＡＳ樹脂など）、エンジ
ニアリングプラスチック（ポリカーボネート樹脂、変性
ポリフェニレン樹脂など）などの単体またはそれらの２
以上のブレンド体であり、また、それらと充填材（カー
ボンファイバー、炭酸カルシウム、タルク、マイカな
ど）のブレンド体およびポリオレフィン系の熱可塑性エ
ラストマーである。In the present invention, the thermoplastic resin forming the storage case 1 is a polyolefin resin (polyethylene resin, polypropylene resin, etc.), polyamide resin (nylon, etc.), polyester resin (polyethylene terephthalate, polybutylene terephthalate, etc.). ),
Styrene resin (ABS resin, AS resin, etc.), engineering plastic (polycarbonate resin, modified polyphenylene resin, etc.), etc., or two of them
The above blends are blends of these and fillers (carbon fiber, calcium carbonate, talc, mica, etc.), and polyolefin thermoplastic elastomers.
【００２０】本発明において発泡体８は、ポリエチレ
ン、ポリプロピレン、ポリスチレン、ポリウレタンを発
泡したものであり、収納リセス５の内側面５ａ、底面５
ｂに対応するように予め成形したものである。In the present invention, the foam 8 is formed by foaming polyethylene, polypropylene, polystyrene, or polyurethane, and has the inner side surface 5a and the bottom surface 5 of the storage recess 5.
It is preformed so as to correspond to b.
【００２１】なお、廃棄時のリサイクルを考慮すると、
収納ケース１を構成する熱可塑性プラスチックと発泡体
８を同材質とすることが好ましい。Considering recycling at the time of disposal,
It is preferable that the thermoplastic material forming the storage case 1 and the foam 8 are made of the same material.
【００２２】本発明に係る収納ケースは、特に緩衝性を
要する収納リセスを有するものであって発泡体は本体ま
たは蓋体の少なくとも一方に設けるが、特に本体に設け
るのが好適である。そして、本発明に係る収納ケース
は、図示した実施の形態のように中空二重壁構造であっ
て一体の収納リセスを形成したものに限らず、複数の中
空二重壁構造の板体により構成されるコンテナと称され
るものなどを含むもである。The storage case according to the present invention has a storage recess particularly requiring a cushioning property, and the foam is provided on at least one of the main body and the lid, but it is particularly preferable to provide it on the main body. The storage case according to the present invention is not limited to the hollow double-wall structure and the integrated storage recess formed as in the illustrated embodiment, and includes a plurality of hollow double-walled plate members. It also includes what is called a container.
【００２３】本発明に係る収納ケース１は、図４および
図５に示す態様で成形される。図４および図５におい
て、１０、１１は分割金型であり、その一方の金型１０
は、本体２および蓋体３の外壁を形成する凹状のキャビ
テイ１２を有し、他方の金型１１は、内壁を形成する凸
状のキャビティ１３を有している。一方の金型１０と他
方の金型１１には、それぞれキャビティ１２，１３の面
に真空吸引をかけるための真空空間１４および複数の吸
引間隙１５を設けてある。また、一方の金型１０と他方
の金型１１には、それぞれのピンチオフ部に摺動金型１
６、１７を備えている。The storage case 1 according to the present invention is molded in the manner shown in FIGS. In FIGS. 4 and 5, reference numerals 10 and 11 denote split molds, one of which is a mold 10.
Has a concave cavity 12 forming the outer walls of the main body 2 and the lid 3, and the other mold 11 has a convex cavity 13 forming the inner wall. The mold 10 on one side and the mold 11 on the other side are provided with a vacuum space 14 and a plurality of suction gaps 15 for applying vacuum suction to the surfaces of the cavities 12 and 13, respectively. In addition, one die 10 and the other die 11 have sliding die 1 at each pinch-off portion.
6 and 17 are provided.
【００２４】収納ケース１を成形するにあたっては、図
４に示すように、一方の金型１０および他方の１１を開
き、それぞれの摺動金型１６、１７を進出させ、一方の
金型１０と他方の金型１１の間に、押出ヘッドから一対
のシート状のパリソン１８、１９を垂下させる。そし
て、この状態においては、それぞれのパリソン１８、１
９の周囲は摺動金型１６、１７に接して一方の金型１０
および他方の金型１１のキャビティ１２、１３側がパリ
ソン１８、１９により閉じた空間を形成する。When the storage case 1 is molded, as shown in FIG. 4, one mold 10 and the other mold 11 are opened, and the respective sliding molds 16 and 17 are advanced so that one mold 10 and A pair of sheet-shaped parisons 18, 19 are hung from the extrusion head between the other mold 11. And in this state, each parison 18, 1
The periphery of 9 is in contact with the sliding molds 16 and 17 and one mold 10
And the cavities 12 and 13 side of the other mold 11 form a space closed by the parison 18 and 19.
【００２５】次いで、図４に示すように、真空空間１４
から吸引間隙１５を通してキャビティ１２、１３に真空
吸引をかけると、パリソン１８、１９はそれぞれ一方の
金型１０、１１のキャビティ１２、１３に密接して外壁
と内壁が形成される。そして、この状態において、予め
所定の形状に成形されている発泡体８を収納リセス５に
対応する部位に配置してパリソン１８に両面粘着テープ
などによって付着保持させる。Next, as shown in FIG. 4, the vacuum space 14
When vacuum suction is applied to the cavities 12 and 13 through the suction gap 15 from above, the parisons 18 and 19 are brought into close contact with the cavities 12 and 13 of one of the molds 10 and 11 to form the outer wall and the inner wall. Then, in this state, the foamed body 8 which has been molded into a predetermined shape in advance is arranged at a portion corresponding to the storage recess 5 and attached and held to the parison 18 by a double-sided adhesive tape or the like.
【００２６】次いで、図５に示すように、一方の金型１
０と他方の金型１１を型締めすると、一対のパリソン１
８、１９の周囲は摺動金型１６、１７によって圧縮され
溶着される。そして、前記のように、パリソン１８の収
納リセス５に対応する部位に付着保持されていた発泡体
８は、パリソン１９とによって密に挟持され、本体２の
中空部７の収納リセス５に対応する部位に内装される。Next, as shown in FIG. 5, one mold 1 is used.
When 0 and the other mold 11 are clamped, a pair of parison 1
The circumferences of 8 and 19 are compressed and welded by the slide molds 16 and 17. Then, as described above, the foam 8 adhered and held at the portion corresponding to the storage recess 5 of the parison 18 is tightly sandwiched by the parison 19 and corresponds to the storage recess 5 of the hollow portion 7 of the main body 2. It is installed in the part.
【００２７】一対のシート状パリソン１８、１９の一方
のパリソン１８を他方のパリソン１９と異なる曲げ弾性
率の熱可塑性樹脂により構成することができる。この場
合において、外壁となるパリソン１８の曲げ弾性率を内
壁となるパリソン１９の曲げ弾性率より小さくし、パリ
ソン１８の肉厚をパリソン１９の肉厚より厚くすること
が好ましい。One parison 18 of the pair of sheet-shaped parisons 18 and 19 may be made of a thermoplastic resin having a bending elastic modulus different from that of the other parison 19. In this case, it is preferable that the bending elastic modulus of the parison 18 serving as the outer wall is smaller than the bending elastic modulus of the parison 19 serving as the inner wall, and the wall thickness of the parison 18 is larger than the wall thickness of the parison 19.
【００２８】[0028]
【発明の効果】本発明によれば、本体または蓋体を曲げ
弾性率が１００〜６００ＭＰａのプラスチックで形成
し、かつその内壁および外壁の肉厚をそれぞれ０．２〜
５．０ｍｍとし、また、外壁の曲げ弾性率を内壁の曲げ
弾性率より大きいプラスチックで構成し、さらに、外壁
の肉厚を内壁の肉厚より厚く形成することにより、収納
リセスの中空部内に発泡体を内装することと相俟って、
収納リセスの緩衝性を大きく向上させて、収納物品の保
護性に優れた収納ケースを得ることができる。According to the present invention, the main body or the lid is made of a plastic having a bending elastic modulus of 100 to 600 MPa, and the inner wall and the outer wall have a wall thickness of 0.2 to respectively.
It is 5.0 mm, and the outer wall is made of plastic whose bending elastic modulus is larger than that of the inner wall, and the outer wall is made thicker than the inner wall, thereby foaming in the hollow part of the storage recess. Combined with the interior of the body,
It is possible to greatly improve the cushioning property of the storage recess and obtain a storage case that is excellent in protection of stored items.
【００２９】そして、本発明によれば、一対のシート状
パリソンの一方のパリソンを他方のパリソンと異なる曲
げ弾性率の熱可塑性樹脂により構成することにより、収
納物品の保護性に優れた収納ケースをブロー成形により
製造する方法を提供することができる。According to the present invention, one parison of the pair of sheet-shaped parisons is made of a thermoplastic resin having a bending elastic modulus different from that of the other parison, thereby providing a storage case excellent in protection of stored articles. A method of manufacturing by blow molding can be provided.
【図１】本発明に係る収納ケースの全体斜視図である。FIG. 1 is an overall perspective view of a storage case according to the present invention.
【図２】図１の収納ケースを開いて示す正面図である。FIG. 2 is a front view showing the storage case of FIG. 1 in an open state.
【図３】図２のＡ−Ａ線断面図である。3 is a cross-sectional view taken along the line AA of FIG.
【図４】分割金型を開いて押出ヘッドから筒状のパリソ
ンを垂下した工程を示す断面図である。FIG. 4 is a cross-sectional view showing a process of opening a split mold and hanging a cylindrical parison from an extrusion head.
【図５】分割金型を型締めしてブロー成形し、かつ発泡
体を内装した工程を示す断面図である。FIG. 5 is a cross-sectional view showing a process in which a split mold is clamped, blow-molded, and a foam body is incorporated.
１ 収納ケース ２ 本体 ３ 蓋体 ４ ヒンジ ５ 収納リセス ６ 収納リセス ７ 中空部 ８ 発泡体 ９ エア抜き孔 １０ 一方の金型 １１ 他方の金型 １２ キャビティ １３ キャビティ １４ 真空空間 １５ 吸引間隙 １６、１７ 摺動金型 １８、１９ シート状のパリソン 1 storage case 2 body 3 lid 4 hinges 5 storage recess 6 storage recess 7 hollow 8 foam 9 Air vent hole 10 One mold 11 Other mold 12 cavities 13 cavities 14 vacuum space 15 suction gap 16, 17 Sliding mold 18, 19 sheet parison
Claims (6)
なくとも一方が外壁と内壁とを対向させてその間に中空
部を有する中空二重壁構造であって、中空二重壁構造の
内壁に１つまたは複数の収納リセスを形成して成るプラ
スチック製の収納ケースにおいて、本体または蓋体を曲
げ弾性率が１００〜６００ＭＰａのプラスチックで形成
するとともに、内壁と外壁の曲げ弾性率または肉厚の値
を異なるものとし、かつその内壁および外壁の肉厚をそ
れぞれ０．２〜５．０ｍｍとし、少なくとも本体または
蓋体の収納リセスの中空部内に、発泡体を充填してなる
ことを特徴とする収納ケース。1. A hollow double-wall structure comprising a main body and a lid, at least one of which has an outer wall and an inner wall facing each other and a hollow portion therebetween, wherein the inner wall of the hollow double-wall structure has In a plastic storage case formed by forming one or a plurality of storage recesses, the main body or the lid is formed of plastic having a bending elastic modulus of 100 to 600 MPa, and the bending elastic modulus or the wall thickness of the inner wall and the outer wall is adjusted. A storage case different from each other and having wall thicknesses of the inner wall and the outer wall of 0.2 to 5.0 mm, and at least filling the hollow portion of the storage recess of the main body or the lid with the foam. .
り大きいプラスチックで構成したことを特徴とする請求
項１記載の収納ケース。2. The storage case according to claim 1, wherein the outer wall is made of plastic whose bending elastic modulus is higher than that of the inner wall.
たことを特徴とする請求項１または２記載の収納ケー
ス。3. The storage case according to claim 1, wherein the outer wall is formed to be thicker than the inner wall.
０．０２〜０．０７Ｋｇ／ｃｍ2または密度を０．０１
５〜０．０３ｇ／ｃｍ3としたことを特徴とする請求項
１、２、または３記載の収納ケース。4. The compressive strength and the density of the foamed material provided inside the hollow portion are 0.02-0.07 Kg / cm 2 and 0.01, respectively.
The storage case according to claim 1, 2 or 3, wherein the storage case is 5 to 0.03 g / cm 3 .
は複数のエア抜き孔を設けたことを特徴とする請求項
１、２、３または４記載の収納ケース。5. The storage case according to claim 1, 2, 3 or 4, wherein one or a plurality of air vent holes are provided in the storage recess containing foam.
間に押出ヘッドから一対のシート状のパリソンを垂下し
て、それぞれのパリソンを対向する分割金型のキャビテ
ィに密着させて中空二重壁構造の内外壁をそれぞれ形成
するとともに内外壁のうち一方の壁となるパリソンの収
納リセスと対応する部位に発泡体を配置して分割金型を
型締めし、キャビティ周囲を互いに密着させて、次いで
閉じたシート状パリソンの内部に圧力流体を導入するこ
とにより発泡体を内装した収納ケースのブロー成形方法
において、一対のシート状パリソンの一方のパリソンを
他方のパリソンと異なる曲げ弾性率の熱可塑性樹脂によ
り構成することを特徴とする収納ケースの製造方法。6. A hollow double mold in which a pair of sheet-shaped parisons are hung from an extrusion head between split dies composed of one and the other dies, and the parisons are brought into close contact with the cavities of the split dies facing each other. Form the inner and outer walls of the wall structure respectively and place the foam in the part corresponding to the storage recess of the parison that is one of the inner and outer walls, clamp the split molds, and close the cavities to each other, Then, in a blow molding method of a storage case containing a foam body by introducing a pressure fluid into the closed sheet-shaped parison, one parison of the pair of sheet-shaped parisons has a bending elastic modulus different from that of the other parison. A method for manufacturing a storage case, which is characterized in that it is made of resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001367723A JP2003164316A (en) | 2001-11-30 | 2001-11-30 | Housing case and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001367723A JP2003164316A (en) | 2001-11-30 | 2001-11-30 | Housing case and production method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003164316A true JP2003164316A (en) | 2003-06-10 |
Family
ID=19177427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001367723A Pending JP2003164316A (en) | 2001-11-30 | 2001-11-30 | Housing case and production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003164316A (en) |
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