JP2010221572A - Resin material and laser-welding method for resin material - Google Patents

Resin material and laser-welding method for resin material Download PDF

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JP2010221572A
JP2010221572A JP2009072386A JP2009072386A JP2010221572A JP 2010221572 A JP2010221572 A JP 2010221572A JP 2009072386 A JP2009072386 A JP 2009072386A JP 2009072386 A JP2009072386 A JP 2009072386A JP 2010221572 A JP2010221572 A JP 2010221572A
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resin material
groove
laser beam
laser
joint surface
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JP4944918B2 (en
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Koji Urase
浩司 浦瀬
Koji Nagano
康志 永野
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Panasonic Electric Works Co Ltd
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Panasonic Electric Works Co Ltd
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    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
    • B29C66/322—Providing cavities in the joined article to collect the burr
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1635—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1654—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2424—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain
    • B29C66/24243—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain forming a quadrilateral
    • B29C66/24244—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain forming a quadrilateral forming a rectangle
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
    • B29C66/53461—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat joining substantially flat covers and/or substantially flat bottoms to open ends of container bodies
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/65—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles with a relative motion between the article and the welding tool
    • B29C66/652—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles with a relative motion between the article and the welding tool moving the welding tool around the fixed article
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Toxicology (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin material and a laser-welding method for the resin material, wherein the laser-welding method keeps a molten resin material from overflowing a resin material body and stabilizes a welding strength. <P>SOLUTION: An absorptive resin material 102 which absorbs a laser light 103 and a permeable resin material 101 which allows the laser light 103 permeate are overlapped and pressurized, their joint surface 104 is irradiated and scanned by the laser light 103 from the permeable resin material 101 side thereby melting both the resin materials and welding so as to compose the resin material; wherein a groove 101a is prepared in both sides of a scanning locus 103a of the laser light 103 on the joint surface 104 with the permeable resin material 101. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、樹脂材および樹脂材のレーザー溶着方法に関するものである。   The present invention relates to a resin material and a laser welding method for the resin material.

従来、レーザー光を吸収する吸収性樹脂材と、レーザー光を透過させる透過性樹脂材とを重ね合わせて加圧し、その接合面に透過性樹脂材側からレーザー光を照射することで、両樹脂材を溶融させて、両樹脂材を溶着して構成される樹脂材および、樹脂材のレーザー溶着方法が提案されている（例えば、特許文献１）。   Conventionally, both resins are obtained by overlaying and pressing an absorbent resin material that absorbs laser light and a transparent resin material that transmits laser light, and irradiating the joint surface with laser light from the side of the transparent resin material. A resin material constituted by melting a material and welding both resin materials and a laser welding method of the resin material have been proposed (for example, Patent Document 1).

図７に示す従来の樹脂材のレーザー溶着方法の概略構成図を用いて、原理を簡単に説明する。以下、図７に対する上下左右方向を基準とする。   The principle will be briefly described with reference to the schematic configuration diagram of the conventional laser welding method for resin materials shown in FIG. Hereinafter, the vertical and horizontal directions with respect to FIG.

図７（ａ）において、断面が略矩形状の透過性樹脂材７０１の下面と、断面が略矩形状の吸収性樹脂材７０２の上面とが当接することで、接合面７０４を形成している。なお、本従来例は透過性樹脂材７０１の下面に反り７０１ａ、吸収性樹脂材７０２の上部に気泡が生じている場合として、以下説明する。透過性樹脂材７０１の下面に反り７０１ｂがあるため、接合面７０４には空間７０６ができている。   In FIG. 7A, the lower surface of the transparent resin material 701 having a substantially rectangular cross section and the upper surface of the absorbent resin material 702 having a substantially rectangular cross section are in contact with each other to form a bonding surface 704. . This conventional example will be described below as a case in which bubbles are generated on the upper surface of the absorbent resin material 702 while the warp 701a is warped on the lower surface of the transparent resin material 701. Since there is a warp 701 b on the lower surface of the transparent resin material 701, a space 706 is formed on the joint surface 704.

そして、押さえ冶具（図示無し）で加圧力Ｐ７１を加えた状態で、透過性樹脂材７０１側からレーザー光７０３を照射すると、レーザー光７０３は透過性樹脂材７０１ではほとんど吸収されずに透過して、吸収性樹脂材７０２の表面付近で吸収される。吸収されたレーザー光７０３のエネルギーは熱に変換され、吸収性樹脂材７０２の表面を加熱する。そして、吸収性樹脂材７０２の表面と接している透過性樹脂材７０１の表面も、熱伝達によって加熱される。   Then, when the laser beam 703 is irradiated from the transmissive resin material 701 side in a state where the pressing force P71 is applied by a holding jig (not shown), the laser beam 703 is hardly absorbed by the transmissive resin material 701 and is transmitted. It is absorbed near the surface of the absorbent resin material 702. The energy of the absorbed laser beam 703 is converted into heat, and the surface of the absorbent resin material 702 is heated. The surface of the permeable resin material 701 that is in contact with the surface of the absorbent resin material 702 is also heated by heat transfer.

その結果、図７（ｂ）に示すように、吸収性樹脂材７０２と透過性樹脂材７０１の接合面７０４に溶融樹脂材７０５が形成され、溶融樹脂材７０５が冷却して固化することで両樹脂材が溶着される。   As a result, as shown in FIG. 7B, a molten resin material 705 is formed on the joint surface 704 of the absorbent resin material 702 and the permeable resin material 701, and the molten resin material 705 is cooled and solidified. Resin material is welded.

また、図８に示すように、レーザー光８０３を照射して走査することで、例えば矩形箱状のケース８００における、吸収性樹脂材で形成されたケース本体８０２と、透過性樹脂材で形成された蓋８０１とを溶着して密封することができる。   Further, as shown in FIG. 8, by scanning with irradiation with laser light 803, for example, a case body 802 formed of an absorbent resin material in a rectangular box-shaped case 800 and a transparent resin material are formed. The lid 801 can be welded and sealed.

特開２００５−２８８９３４号公報JP 2005-288934 A

しかし、本従来例のように、空間７０６と気泡７０２ａとがある状態でレーザー光７０３を照射して樹脂材を加熱すると、空間７０６と気泡７０２ａの空気も加熱されて膨張し、破裂が発生する。図７（ｃ）に示すように、この破裂によって、溶融樹脂材７０５は接合面７０４に沿って飛散し、不均一な状態で冷却固化するので、溶着強度が不安定となり、リーク不良が生じる。また、溶融樹脂材７０５の飛散または流出により、樹脂材本体からはみ出すことで外観を損ねることとなる。   However, as in the conventional example, when the resin material is heated by irradiating the laser beam 703 in a state where the space 706 and the bubble 702a are present, the air in the space 706 and the bubble 702a is also heated and expands, and rupture occurs. . As shown in FIG. 7C, this rupture causes the molten resin material 705 to scatter along the joint surface 704 and to cool and solidify in a non-uniform state, so that the welding strength becomes unstable and a leak failure occurs. In addition, the appearance of the molten resin material 705 is spoiled or outflowed, and the appearance is impaired by protruding from the resin material body.

本発明は、上記事由に鑑みてなされたものであり、その目的は、接合面の空気が膨張して破裂した場合でも、溶融樹脂材が樹脂材本体からはみ出さず、溶着強度が安定した樹脂材および樹脂材のレーザー溶着方法を提供することにある。   The present invention has been made in view of the above reasons, and the purpose thereof is a resin in which the molten resin material does not protrude from the resin material main body even when the air on the joint surface expands and ruptures, and the welding strength is stable. It is in providing the laser welding method of a material and a resin material.

請求項１の発明は、レーザー光を吸収する吸収性樹脂材と、レーザー光を透過させる透過性樹脂材とを重ね合わせて加圧し、その接合面に透過性樹脂材側からレーザー光を照射して走査することで、両樹脂材を溶融させて、両樹脂材を溶着して構成される樹脂材において、一方の樹脂材の接合面における、レーザー光の走査軌跡の両側方のうち少なくとも一方に溝を設けることを特徴とする。   According to the first aspect of the present invention, an absorbent resin material that absorbs laser light and a transparent resin material that transmits laser light are superimposed and pressed, and the joint surface is irradiated with laser light from the transparent resin material side. In the resin material constituted by melting both resin materials and welding both resin materials, scanning at least one of the both sides of the laser beam scanning locus on the joint surface of one resin material. A groove is provided.

この発明によれば、樹脂材において、レーザー光の照射により、膨張または破裂した空気と溶融樹脂材とを接合面に形成された溝に逃がすことができる。そのため、溶融樹脂材は樹脂材本体からはみ出さず、均一な状態で冷却固化することができるので、溶着強度を安定させることができる。   According to the present invention, in the resin material, the expanded or ruptured air and the molten resin material can be released to the groove formed on the joint surface by the laser light irradiation. Therefore, the molten resin material does not protrude from the resin material main body and can be cooled and solidified in a uniform state, so that the welding strength can be stabilized.

請求項２の発明は、請求項１の発明において、前記透過性樹脂材に前記溝を設けることを特徴とする。   The invention of claim 2 is characterized in that, in the invention of claim 1, the groove is provided in the permeable resin material.

この発明によれば、溝内部にある空間の温度の上昇を抑制することができる。透過性樹脂材はレーザー光を透過するので、レーザー光により直接加熱されることはないため、吸収性樹脂材よりも温度は低くなる。それにより、透過性樹脂材に溝を設けることで、溝内部の温度の上昇を抑制することができ、溝内部の空気の膨張が抑制されるので、膨張または破裂した空気をより多く溝に逃がすことができる。   According to this invention, the rise in the temperature of the space in the groove can be suppressed. Since the transmissive resin material transmits laser light, it is not directly heated by the laser light, so the temperature is lower than that of the absorbent resin material. Thereby, by providing the groove in the permeable resin material, it is possible to suppress the temperature rise inside the groove, and the expansion of the air inside the groove is suppressed, so that more expanded or ruptured air is released to the groove. be able to.

請求項３の発明は、請求項１または２の発明において、複数の前記溝を設けることを特徴とする。   The invention of claim 3 is characterized in that in the invention of claim 1 or 2, a plurality of the grooves are provided.

この発明によれば、複数の溝を設けることによって、膨張または破裂した空気および、溶融樹脂材をより多く逃がすことができる。   According to the present invention, by providing a plurality of grooves, it is possible to release more expanded or ruptured air and molten resin material.

請求項４の発明は、請求項１乃至３のいずれか１項の発明において、前記溝の経路は、レーザー光の走査軌跡に対して平行でない経路を含むことを特徴とする。   According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the path of the groove includes a path that is not parallel to the scanning locus of the laser beam.

この発明によれば、溝の経路を長く構成することで、膨張または破裂した空気および、溶融樹脂材をより多く逃がすことができる。   According to the present invention, it is possible to release a larger amount of the expanded or ruptured air and the molten resin material by configuring the groove path longer.

請求項５の発明は、レーザー光を吸収する吸収性樹脂材と、レーザー光を透過させる透過性樹脂材とを重ね合わせて加圧し、その接合面に透過性樹脂材側からレーザー光を照射して走査することで、両樹脂材を溶融させて、両樹脂材を溶着する樹脂材のレーザー溶着方法において、一方の樹脂材の接合面における、レーザー光の走査軌跡の両側方のうち少なくとも一方に溝を設けることを特徴とする。   In the invention of claim 5, an absorbent resin material that absorbs laser light and a transparent resin material that transmits laser light are superposed and pressed, and laser light is irradiated to the joint surface from the transparent resin material side. In the laser welding method of the resin material in which both the resin materials are melted and welded by scanning, at least one of the both sides of the laser beam scanning locus on the joint surface of one resin material. A groove is provided.

この発明によれば、樹脂材のレーザー溶着方法において、レーザー光の照射により、膨張または破裂した空気と溶融樹脂材とを接合面に形成された溝に逃がすことができる。そのため、溶融樹脂材は樹脂材本体からはみ出さず、均一な状態で冷却固化することができるので、溶着強度を安定させることができる。   According to this invention, in the laser welding method of the resin material, the expanded or ruptured air and the molten resin material can be released to the groove formed on the joint surface by the irradiation of the laser beam. Therefore, the molten resin material does not protrude from the resin material main body and can be cooled and solidified in a uniform state, so that the welding strength can be stabilized.

以上説明したように、本発明では、接合面の空気が膨張して破裂した場合でも、溶融樹脂材が樹脂材本体からはみ出さず、溶着強度を安定させることができるという効果がある。   As described above, according to the present invention, even when the air on the joint surface expands and ruptures, the molten resin material does not protrude from the resin material body, and there is an effect that the welding strength can be stabilized.

本発明の樹脂材の概略構成を示す図である。It is a figure which shows schematic structure of the resin material of this invention. 同上の樹脂材を用いた成形物の概略構成を示す図である。It is a figure which shows schematic structure of the molded article using the resin material same as the above. 同上の成形物の上面を示す図である。It is a figure which shows the upper surface of a molded article same as the above. 同上のレーザー光照射前の接合面の断面を示す図である。It is a figure which shows the cross section of the joint surface before laser beam irradiation same as the above. 複数の溝が設けられた接合面の断面を示す図である。It is a figure which shows the cross section of the joint surface in which the some groove | channel was provided. 溝が屈曲線で形成された成形物の上面を示す図である。It is a figure which shows the upper surface of the molding in which the groove | channel was formed by the bending line. 従来の樹脂材の概略構成を示す図である。It is a figure which shows schematic structure of the conventional resin material. 同上の成形物の概略構成を示す図である。It is a figure which shows schematic structure of a molded product same as the above.

以下、本発明の実施の形態を図面に基づいて説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

（実施形態）
図１に本例の概略構成図を示す。以下、図１に対する上下左右方向を基準とする。 (Embodiment)
FIG. 1 shows a schematic configuration diagram of this example. Hereinafter, the vertical and horizontal directions with respect to FIG.

本実施形態の樹脂材および樹脂材のレーザー溶着方法は、レーザー光１０３を透過させる透過性樹脂材１０１と、レーザー光１０３を吸収する吸収性樹脂材１０２とを重ね合わせて加圧し、レーザー光１０３を透過性樹脂材１０１側から照射して、接合面１０４に溶融樹脂材１０５を形成して両樹脂材が溶着して構成される樹脂材および樹脂材のレーザー溶着方法である。   In the resin material and the laser welding method of the resin material of the present embodiment, the transparent resin material 101 that transmits the laser beam 103 and the absorbent resin material 102 that absorbs the laser beam 103 are superposed and pressurized, and the laser beam 103 is applied. Is formed from the resin material 101 side, a molten resin material 105 is formed on the joint surface 104, and both resin materials are welded together, and a laser welding method of the resin material.

図２に本例の樹脂材を用いた成形物の構成図、図３に成形物の上面図を示す。   FIG. 2 is a configuration diagram of a molded product using the resin material of this example, and FIG. 3 is a top view of the molded product.

本発明の樹脂材は、例えば図２に示すようなケース１００において、ケース本体を構成する吸収性樹脂材１０２と、蓋を構成する透過性樹脂材１０１に用いられ、レーザー光１０３を照射して走査することで両樹脂材を溶着することができる。   The resin material of the present invention is used for the absorbent resin material 102 constituting the case body and the transmissive resin material 101 constituting the lid in the case 100 as shown in FIG. Both resin materials can be welded by scanning.

吸収性樹脂材１０２は上面が開口した略矩形箱状、透過性樹脂材１０１は略矩形板状で形成され、吸収性樹脂材１０２の上部に透過性樹脂材１０１が覆設される。そして、吸収性樹脂材１０２開口周縁と透過性樹脂材１０１下面とが当接することで形成される接合面１０４に、透過性樹脂材１０１上面からレーザー光１０３が照射して走査することで、略矩形状の走査軌跡１０３ａが形成される。   The absorbent resin material 102 is formed in a substantially rectangular box shape with an open top surface, and the permeable resin material 101 is formed in a substantially rectangular plate shape, and the permeable resin material 101 is covered over the absorbent resin material 102. Then, the laser beam 103 is irradiated and scanned from the upper surface of the transparent resin material 101 onto the bonding surface 104 formed by the contact between the peripheral edge of the opening of the absorbent resin material 102 and the lower surface of the transparent resin material 101, thereby approximately A rectangular scanning locus 103a is formed.

そして、走査軌跡１０３ａの両側方において、走査軌跡１０３ａに平行して沿う経路で、断面が略矩形状をした溝１０１ａが透過性樹脂材１０１の下面に設けられている。   A groove 101a having a substantially rectangular cross section is provided on the lower surface of the transparent resin material 101 along a path parallel to the scanning locus 103a on both sides of the scanning locus 103a.

レーザー光１０３照射前における、接合面１０４の一部断面図を図４に示す。   A partial cross-sectional view of the bonding surface 104 before irradiation with the laser beam 103 is shown in FIG.

なお、接合面１０４のレーザー光１０３が照射される箇所において、透過性樹脂材１０１の下面に反り１０１ｂ、吸収性樹脂材１０２の上部に樹脂成型時に空気が樹脂内に閉じ込められて形成された気泡１０２ａが生じている場合として、以下説明する。   It should be noted that at the portion of the joint surface 104 where the laser beam 103 is irradiated, a warp 101b is formed on the lower surface of the transparent resin material 101, and air bubbles are formed on the upper portion of the absorbent resin material 102 by trapping air in the resin. The case where 102a occurs is described below.

そして、透過性樹脂材１０１の下面に反り１０１ｂが生じているため、接合面１０４には空間１０６ができている。   And since the curvature 101b has arisen in the lower surface of the transparent resin material 101, the space 106 is made in the joining surface 104. FIG.

接合面１０４に空間１０６がある状態または、樹脂材に気泡１０２ａがある状態で、レーザー光１０３を接合面１０４に照射すると、樹脂材が加熱されて溶融樹脂材１０５が形成されると共に、加熱された樹脂材によって空間１０６と気泡１０２ａの空気も加熱されて膨張する。   When the bonding surface 104 is irradiated with the laser beam 103 with the space 106 on the bonding surface 104 or the bubble 102a in the resin material, the resin material is heated and the molten resin material 105 is formed and heated. The air in the space 106 and the bubbles 102a is also heated by the resin material and expands.

しかし、本例では図１に示すように、接合面１０４を形成する透過性樹脂材１０１の下面に溝１０１ａを設けているため、接合面１０４にある空間１０６の膨張した空気を溝１０１ａに逃がすことができる。   However, in this example, as shown in FIG. 1, since the groove 101a is provided on the lower surface of the transparent resin material 101 forming the bonding surface 104, the expanded air in the space 106 on the bonding surface 104 is released to the groove 101a. be able to.

また、気泡１０２ａように樹脂内に空気が閉じ込められた場合や、接合面１０４が密着して溝１０１ａまでの経路が塞がれている場合等には、破裂を起こして溶融樹脂材１０５が飛散する場合がある。しかし、破裂が起きても、破裂した空気および飛散した溶融樹脂材１０５を溝１０１ａに逃がすことができるので、溶融樹脂材１０５を略均一な状態で冷却固化することができるので、安定した溶着強度を保つことが出来る。また、流動性を有する溶融樹脂材１０５が接合面１０４に沿って流れる場合があるが、溶融樹脂材１０５は溝１０１ａに流入するため、樹脂材本体からはみ出すことはない。   Further, when air is confined in the resin like the bubble 102a, or when the bonding surface 104 is in close contact and the path to the groove 101a is blocked, the molten resin material 105 is scattered due to rupture. There is a case. However, even if the rupture occurs, the ruptured air and the scattered molten resin material 105 can be released to the groove 101a, so that the molten resin material 105 can be cooled and solidified in a substantially uniform state. Can be kept. In addition, although the molten resin material 105 having fluidity may flow along the joint surface 104, the molten resin material 105 flows into the groove 101a and thus does not protrude from the resin material body.

このように、接合面１０４において、レーザー光１０３の走査軌跡１０３ａの側方に溝１０１ａを設けることによって、溶融樹脂材１０５が樹脂材本体からはみ出さず、安定した溶着強度で樹脂材を溶着することができる。なお、反り１０１ｂや気泡１０２ａ以外の条件でも、接合面１０４に空間がある状態であれば、本発明による上記効果を得ることができる。   As described above, by providing the groove 101a on the side of the scanning locus 103a of the laser beam 103 on the bonding surface 104, the molten resin material 105 does not protrude from the resin material body, and the resin material is welded with a stable welding strength. be able to. Note that the above-described effects of the present invention can be obtained as long as there is a space on the joint surface 104 even under conditions other than the warp 101b and the bubbles 102a.

また、上述の例では、レーザー光１０３の走査軌跡１０３ａの両側方に１つずつ溝１０１ａを設けているが、走査軌跡の両側方に複数の溝を設けた例を図５に示す。   In the above example, one groove 101a is provided on each side of the scanning locus 103a of the laser beam 103. FIG. 5 shows an example in which a plurality of grooves are provided on both sides of the scanning locus.

本例では、透過性樹脂材５０１の下面におけるレーザー光５０３の走査軌跡の両側方に２つずつ上記同様の溝５０１ａが設けられている。   In this example, two grooves 501 a similar to the above are provided on each side of the scanning locus of the laser beam 503 on the lower surface of the transparent resin material 501.

透過性樹脂材５０１と吸収性樹脂材５０２との接合面５０４に空間がある場合に、空気が膨張または破裂しても、溝５０１ａの数が増えることで、溝５０１ａ内の空間の体積が増加しているので、膨張または破裂した空気および溶融樹脂材５０５を、溝５０１ａにより多く逃がすことができる。そのため、溶融樹脂材５０５が樹脂材本体からはみ出さず、より安定した溶着強度を保つことができる。   If there is a space on the joint surface 504 between the permeable resin material 501 and the absorbent resin material 502, the volume of the space in the groove 501a increases by increasing the number of the grooves 501a even if air expands or ruptures. Therefore, a larger amount of the expanded or ruptured air and the molten resin material 505 can be released to the groove 501a. Therefore, the molten resin material 505 does not protrude from the resin material body, and a more stable welding strength can be maintained.

なお、本例ではレーザー光５０３の走査軌跡の両側方で互いに同じ数の溝５０１ａを設けているが、走査軌跡の両側方で互いに異なる数の溝を設けてもよい。   In this example, the same number of grooves 501a are provided on both sides of the scanning locus of the laser beam 503, but different numbers of grooves may be provided on both sides of the scanning locus.

また、レーザー光の走査軌跡の片側方にのみ、溝を設けた場合であっても、溶融樹脂材が少ない場合や、接合面の空間が小さい場合等であれば、上記と同様の効果を得ることができる。   Further, even when the groove is provided only on one side of the scanning locus of the laser beam, the same effect as described above can be obtained if the molten resin material is small or the space of the joint surface is small. be able to.

さらに、溝内の空間の体積を増やすために、経路が屈曲線で形成された溝を設けた例を図６に示す。図６は本例の透過性樹脂材の上面図である。   Furthermore, in order to increase the volume of the space in a groove | channel, the example which provided the groove | channel in which the path | route was formed with the bending line is shown in FIG. FIG. 6 is a top view of the transparent resin material of this example.

本例の樹脂材の構成は、上記で説明した略矩形板状の透過性樹脂材１０１と、略矩形箱状の吸収性樹脂材１０２と同一の構成である。そして、同様に、レーザー光の走査軌跡６０３ａの両側方に沿う経路で、溝６０１ａが透過性樹脂材６０１の下面に設けられている。   The configuration of the resin material of this example is the same configuration as the above-described substantially rectangular plate-shaped transparent resin material 101 and the substantially rectangular box-shaped absorbent resin material 102. Similarly, a groove 601a is provided on the lower surface of the transmissive resin material 601 along a path along both sides of the laser beam scanning locus 603a.

しかし、本例では、略矩形状の経路からなる溝６０１ａにおいて、経路を構成する辺の中心が外側へ屈曲する屈曲線で形成されている。このように、溝６０１ａは走査軌跡６０３ａと平行でない経路を含むことによって、走査軌跡６０３ａと平行に溝を形成した時と比較して、溝６０１ａの全長が伸びるので、溝６０１ａ内の空間の体積が大きくなる。そのため、膨張または破裂した空気および溶融樹脂材を、溝６０１ａにより多く逃がすことができる。そのため、溶融樹脂材が樹脂材本体からはみ出さず、より安定して溶着強度を保つことができる。   However, in this example, in the groove 601a composed of a substantially rectangular path, the center of the side constituting the path is formed by a bent line that bends outward. As described above, since the groove 601a includes a path that is not parallel to the scanning locus 603a, the entire length of the groove 601a is increased as compared with the case where the groove is formed in parallel to the scanning locus 603a. Becomes larger. Therefore, a larger amount of the expanded or ruptured air and the molten resin material can be released to the groove 601a. Therefore, the molten resin material does not protrude from the resin material body, and the welding strength can be maintained more stably.

なお、レーザー光の走査軌跡と平行でない経路を含む溝であれば、湾曲線等で形成されていてもよい。   In addition, as long as it is a groove | channel including the path | route which is not parallel to the scanning locus | trajectory of a laser beam, you may form with a curved line etc.

１０１ 透過性樹脂材
１０１ａ 溝
１０２ 吸収性樹脂材
１０３ レーザー光
１０４ 接合面
１０５ 溶融樹脂材 101 Transparent resin material 101a Groove 102 Absorbent resin material 103 Laser beam 104 Bonding surface 105 Molten resin material

Claims (5)

レーザー光を吸収する吸収性樹脂材と、レーザー光を透過させる透過性樹脂材とを重ね合わせて加圧し、その接合面に透過性樹脂材側からレーザー光を照射して走査することで、両樹脂材を溶融させて、両樹脂材を溶着して構成される樹脂材において、
一方の樹脂材の接合面における、レーザー光の走査軌跡の両側方のうち少なくとも一方に溝を設けることを特徴とする樹脂材。 Both the absorbent resin material that absorbs the laser beam and the transparent resin material that transmits the laser beam are overlaid and pressurized, and the joint surface is irradiated with the laser beam from the side of the transparent resin material and scanned. In a resin material configured by melting a resin material and welding both resin materials,
A resin material, characterized in that a groove is provided on at least one of both sides of a scanning locus of laser light on a joint surface of one resin material. 前記透過性樹脂材に前記溝を設けることを特徴とする請求項１記載の樹脂材。   The resin material according to claim 1, wherein the groove is provided in the permeable resin material. 複数の前記溝を設けることを特徴とする請求項１または２記載の樹脂材。   The resin material according to claim 1, wherein a plurality of the grooves are provided. 前記溝の経路は、レーザー光の走査軌跡に対して平行でない経路を含むことを特徴とする請求項１乃至３のいずれか１項に記載の樹脂材。   4. The resin material according to claim 1, wherein the path of the groove includes a path that is not parallel to the scanning trajectory of the laser beam. 5. レーザー光を吸収する吸収性樹脂材と、レーザー光を透過させる透過性樹脂材とを重ね合わせて加圧し、その接合面に透過性樹脂材側からレーザー光を照射して走査することで、両樹脂材を溶融させて、両樹脂材を溶着する樹脂材のレーザー溶着方法において、
一方の樹脂材の接合面における、レーザー光の走査軌跡の両側方のうち少なくとも一方に溝を設けることを特徴とする樹脂材のレーザー溶着方法。 Both the absorbent resin material that absorbs the laser beam and the transparent resin material that transmits the laser beam are overlaid and pressurized, and the joint surface is irradiated with the laser beam from the side of the transparent resin material and scanned. In the laser welding method of the resin material that melts the resin material and welds both resin materials,
A method of laser welding a resin material, characterized in that a groove is provided in at least one of both sides of a laser beam scanning locus on a joint surface of one resin material.
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