JP2008221684A - Laser welding method of two or more resin materials - Google Patents

Laser welding method of two or more resin materials Download PDF

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Publication number
JP2008221684A
JP2008221684A JP2007064612A JP2007064612A JP2008221684A JP 2008221684 A JP2008221684 A JP 2008221684A JP 2007064612 A JP2007064612 A JP 2007064612A JP 2007064612 A JP2007064612 A JP 2007064612A JP 2008221684 A JP2008221684 A JP 2008221684A
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Prior art keywords
resin material
light
absorbing resin
container
end surface
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Mikihiko Kato
三紀彦 加藤
Noritoshi Furuya
教俊 古谷
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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
    • 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
    • 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
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
    • 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
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
    • 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
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1226—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least one bevelled joint-segment
    • 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
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/542—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining hollow covers or hollow 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
    • B29C66/70—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
    • 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
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8122—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • 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
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8126—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81266—Optical properties, e.g. transparency, reflectivity
    • B29C66/81267—Transparent to electromagnetic radiation, e.g. to visible light
    • 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
    • B29C65/1687—Laser beams making use of light guides
    • 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
    • B29C66/116—Single bevelled joints, i.e. one of the parts to be joined being bevelled in the joint area
    • B29C66/1162—Single bevel to bevel joints, e.g. mitre 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
    • B29C66/50—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
    • B29C66/70—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
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2909/00—Use of inorganic materials not provided for in groups B29K2803/00 - B29K2807/00, as mould material
    • B29K2909/08—Glass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • B29K2995/0026—Transparent
    • B29K2995/0027—Transparent for light outside the visible spectrum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages

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

Abstract

<P>PROBLEM TO BE SOLVED: To melt and unite only a part in an end surface of one resin material in a state that plural resin materials contact in an orthogonal state. <P>SOLUTION: In a container 1 comprising a light-absorbing resin material, an upper end side portion of a vertical wall 1A turns to an outside inclined surface 1b of 38° remaining a flat portion 1a of a required range to be melt on an upper end surface. A cap-like lid 2 comprising an optically-transparent resin material forms an interior side inclined surface 2b parallel to the outside inclined surface 1b of the container 1 inside the vertical wall 2B. In a state that the container 1 is covered with the lid 2, an optics system 4 irradiates through the lid 2 a laser beam 6a focusing so as to devote a focal spot to the upper end surface of the vertical wall 1A of the container 1 or a position of a required depth slightly apart from the upper end surface. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、複数の樹脂材料のレーザー溶着方法に関し、特に複数の樹脂材料を直交状態に接触させた状態において、一方の樹脂材料の端面における一部のみを溶融させて結合を行うに適したレーザー溶着方法に係わる。   The present invention relates to a laser welding method for a plurality of resin materials, and in particular, in a state where a plurality of resin materials are brought into contact with each other in an orthogonal state, a laser suitable for bonding by melting only a part of one end surface of one resin material. It relates to the welding method.

従来、複数の樹脂材料を溶着して結合するための手段の一つとしてレーザー溶着方法がある。該レーザー溶着方法は、光透過性の樹脂材料と、光吸収性の樹脂材料とを接触させて加圧保持し、レーザー光を光透過性の樹脂材料を介して光吸収性の樹脂材料の一部に照射し、該光吸収性の樹脂材料の照射部分にレーザー光のエネルギーを吸収させることによって発熱、溶融させると共に、その熱の一部を照射部分に接触している光透過性の樹脂材料の一部に与えてその部分の温度を上昇させて溶融、融合させ、その後融合部分を冷却、固化させてこれら光透過性の樹脂材料と光吸収性の樹脂材料とを結合するものである。   Conventionally, there is a laser welding method as one of means for welding and bonding a plurality of resin materials. In this laser welding method, a light-transmitting resin material and a light-absorbing resin material are brought into contact with each other and held under pressure, and laser light is transmitted through the light-transmitting resin material. A light-transmitting resin material that heats and melts the irradiated portion of the light-absorbing resin material by absorbing the energy of the laser light and heats and melts the portion. The temperature of the part is raised and melted and fused, and then the fused part is cooled and solidified to bond the light-transmitting resin material and the light-absorbing resin material.

ところで、容器を光吸収性の樹脂材料、蓋を光透過性の樹脂材料で成形した樹脂材料からなる蓋付容器にあっては、この容器と蓋との接触部分をレーザー溶着により結合する場合がある。   By the way, in a container with a lid made of a resin material in which the container is made of a light-absorbing resin material and the lid is made of a light-transmitting resin material, the contact portion between the container and the lid may be bonded by laser welding. is there.

斯かる場合において、レーザーによる溶着幅がレーザービーム幅より狭い場合は、従来のレーザー溶着方法によって溶着を行った場合には、レーザーの照射幅が広すぎるため、溶着部以外にダメージを与えてしまう場合がある。即ち、従来のレーザー溶着方法によると、光透過性の樹脂材料からなる蓋と、光吸収性の樹脂材料からなる容器とを、蓋に対して容器の垂直壁が直交状態になるようにして接触させ、レーザー光を蓋を介して容器の垂直壁の端面に照射している。そして、この場合には、容器の垂直壁の端面が肉圧の全域に亘って一様に発熱、溶融されることになり、蓋との溶着は広い範囲に亘って行われることになる。このため蓋を外すのに大変な手間と時間がかかることになる。そこで、容器の垂直壁の端面における一部のみを溶融させることができるようになすためのレーザー溶着方法が要望されている。   In such a case, when the welding width by the laser is narrower than the laser beam width, if the welding is performed by the conventional laser welding method, the laser irradiation width is too wide, so that damage is given to other than the welded portion. There is a case. That is, according to a conventional laser welding method, a lid made of a light-transmitting resin material and a container made of a light-absorbing resin material are brought into contact with each other so that the vertical wall of the container is perpendicular to the lid. The laser beam is irradiated to the end face of the vertical wall of the container through the lid. In this case, the end face of the vertical wall of the container is uniformly heated and melted over the whole area of the wall pressure, and welding with the lid is performed over a wide range. For this reason, it takes a lot of labor and time to remove the lid. Therefore, there is a demand for a laser welding method for melting only a part of the end face of the vertical wall of the container.

本発明は上記の点に鑑みなされたものであって、複数の樹脂材料を直交状態に接触させた状態において、一方の樹脂材料の端面における一部のみを溶融させて結合を行うことができるようになしたレーザー溶着方法を提供せんとするものである。   The present invention has been made in view of the above points, and in a state where a plurality of resin materials are brought into contact with each other in an orthogonal state, only a part of the end surface of one resin material can be melted and bonded. It is intended to provide a laser welding method that has been achieved.

而して、本発明の要旨とするところは、光透過性の樹脂材料と、光吸収性の樹脂材料とを接触させて加圧保持し、レーザー光を光透過性の樹脂材料を介して光吸収性の樹脂材料の一部に照射し、該光吸収性の樹脂材料の照射部分にレーザー光のエネルギーを吸収させることによって発熱、溶融させると共に、その熱の一部を照射部分に接触している光透過性の樹脂材料の一部に与えてその部分の温度を上昇させて溶融、融合させ、その後融合部分を冷却、固化させてこれら光透過性の樹脂材料と光吸収性の樹脂材料とを結合する複数の樹脂材料のレーザー溶着方法において、光吸収性の樹脂材料は、光透過性の樹脂材料との接触側部分を、縦断面形状において、端面に溶融すべき所要範囲のフラット部分を残して３６度乃至４１度の傾斜面となし、一方、光透過性の樹脂材料は、光吸収性の樹脂材料との接触側部分を、縦断面形状において、光吸収性の樹脂材料の端面におけるフラット部分に接触するフラット部分と、これに連なる、光吸収性の樹脂材料の傾斜面と平行する傾斜面となし、これら光透過性の樹脂材料と光吸収性の樹脂材料とを、光透過性の樹脂材料のフラット部分に対して光吸収性の樹脂材料のフラットな端面が当接するよう直交状態に接触させ、レーザー光を、光学系により光吸収性の樹脂材料の端面又はこれから僅かに離れた所要深さの位置に焦点が合うように集束して照射するようになしたことを特徴とする複数の樹脂材料のレーザー溶着方法にある。   Accordingly, the gist of the present invention is that a light-transmitting resin material and a light-absorbing resin material are brought into contact with each other and held under pressure, and laser light is transmitted through the light-transmitting resin material. A part of the absorbent resin material is irradiated, and the irradiated part of the light absorbing resin material absorbs the energy of the laser beam to generate heat and melt, and a part of the heat comes into contact with the irradiated part. It is applied to a part of the light-transmitting resin material, and the temperature of the part is raised to melt and fuse, and then the fused part is cooled and solidified to make these light-transmitting resin material and light-absorbing resin material In the laser welding method of a plurality of resin materials for bonding the light-absorbing resin material, the light-absorbing resin material has a contact-side portion with the light-transmitting resin material, and a flat portion in a required range to be melted on the end surface in the longitudinal sectional shape. With a slope of 36 to 41 degrees On the other hand, the light-transmitting resin material has a contact portion with the light-absorbing resin material in a vertical cross-sectional shape and a flat portion that contacts the flat portion on the end surface of the light-absorbing resin material. The light-absorbing resin material and the light-absorbing resin material are absorbed into a flat portion of the light-transmitting resin material. So that the flat end surface of the light-sensitive resin material comes into contact with each other in an orthogonal state, and the laser beam is focused on the end surface of the light-absorbing resin material by the optical system or a position at a required depth slightly away from it. A laser welding method for a plurality of resin materials, characterized by being focused and irradiated.

また、上記レーザー溶着方法は、光吸収性の樹脂材料を容器とし、光透過性の樹脂材料を前記容器の開口部に被せるキャップ状の蓋とし、これらを溶着する場合に好適に実施することができる。   Further, the laser welding method may be suitably performed when a light-absorbing resin material is used as a container and a light-transmitting resin material is used as a cap-shaped lid that covers the opening of the container, and these are welded. it can.

本発明によれば、複数の樹脂材料を直交状態に接触させた状態において、一方の樹脂材料の端面における一部のみを溶融させて結合を行うことができるものである。   According to the present invention, in a state where a plurality of resin materials are brought into contact with each other in an orthogonal state, only a part of the end surface of one resin material can be melted for bonding.

本発明を実施するための最良の形態は、複数の樹脂材料のレーザー溶着方法において、光吸収性の樹脂材料は、光透過性の樹脂材料との接触側部分を、縦断面形状において、端面に溶融すべき所要範囲のフラット部分を残して３６度乃至４１度の傾斜面となし、一方、光透過性の樹脂材料は、光吸収性の樹脂材料との接触側部分を、縦断面形状において、光吸収性の樹脂材料の端面におけるフラット部分に接触するフラット部分と、これに連なる、光吸収性の樹脂材料の傾斜面と平行する傾斜面となし、これら光透過性の樹脂材料と光吸収性の樹脂材料とを、光透過性の樹脂材料のフラット部分に対して光吸収性の樹脂材料のフラットな端面が当接するよう直交状態に接触させ、レーザー光を、光学系により光吸収性の樹脂材料の端面又はこれから僅かに離れた所要深さの位置に焦点が合うように集束して照射するようになすことにある。   The best mode for carrying out the present invention is a laser welding method of a plurality of resin materials, wherein the light-absorbing resin material has a contact-side portion with a light-transmitting resin material on the end surface in a longitudinal cross-sectional shape. A flat part of the required range to be melted is left and an inclined surface of 36 degrees to 41 degrees is formed. On the other hand, the light-transmitting resin material has a contact side portion with the light-absorbing resin material in a longitudinal sectional shape. There is a flat part in contact with the flat part on the end face of the light-absorbing resin material, and an inclined surface parallel to the inclined surface of the light-absorbing resin material, and these light-transmitting resin material and light-absorbing property. The resin material is brought into contact with the flat portion of the light-transmitting resin material in an orthogonal state so that the flat end surface of the light-absorbing resin material is in contact with the flat portion of the light-transmitting resin material. Material end face or After converging to focus on the position of the required depth slightly apart in the form to illuminate.

以下、本発明の実施例について説明する。
図１は本発明の一実施例に係るレーザー溶着方法の説明図、図２は樹脂材料からなる蓋付容器の溶着前の状態の断面図、図３はレーザー光の照射状態を示す部分拡大断面図である。 Examples of the present invention will be described below.
FIG. 1 is an explanatory view of a laser welding method according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of a state before welding of a lidded container made of a resin material, and FIG. 3 is a partially enlarged cross-sectional view showing a laser light irradiation state FIG.

図中、１、２は溶着すべき複数の樹脂材料である。また、該樹脂材料は、本実施例においては、１を光吸収性の樹脂材料からなる容器とし、２を光透過性の樹脂材料からなるキャップ状の蓋としている。   In the figure, 1 and 2 are a plurality of resin materials to be welded. In this embodiment, the resin material has a container 1 made of a light-absorbing resin material and a cap-shaped lid 2 made of a light-transmitting resin material.

また、光吸収性の樹脂材料からなる容器１は、本実施例においては直径を３０ｍｍ、高さを１８ｍｍ、垂直壁１Ａ及び底壁１Ｂの厚味を夫々３ｍｍ、垂直壁１Ａの上端面の溶融すべきフラット部分１ａの幅を０．５ｍｍ、垂直壁１Ａ上部の前記フラット部分１ａに連なる外側傾斜面１ｂの傾斜角度θ１を３８度としている。尚、該外側傾斜面１ｂの傾斜角度θ１については、３６度乃至４１度の範囲内において適宜に決定される。   In the present embodiment, the container 1 made of a light-absorbing resin material has a diameter of 30 mm, a height of 18 mm, a thickness of the vertical wall 1A and the bottom wall 1B of 3 mm, respectively, and melting of the upper end surface of the vertical wall 1A. The width of the flat portion 1a to be processed is 0.5 mm, and the inclination angle θ1 of the outer inclined surface 1b connected to the flat portion 1a above the vertical wall 1A is 38 degrees. The inclination angle θ1 of the outer inclined surface 1b is appropriately determined within the range of 36 degrees to 41 degrees.

また、光透過性の樹脂材料からなるキャップ状の蓋２は、本実施例においては直径を３４ｍｍ、高さを４．０６ｍｍ、天壁２Ａの厚味を１．５ｍｍ、外周の垂直壁２Ｂの前記容器１の外側傾斜面１ｂと平行する内側傾斜面２ｂの角度θ２を５２度、内側傾斜面２ｂの傾斜始端２ｂ′から垂直壁２Ｂの外周面までを８ｍｍとしている。   The cap-shaped lid 2 made of a light-transmitting resin material has a diameter of 34 mm, a height of 4.06 mm, a top wall 2A thickness of 1.5 mm, and an outer peripheral vertical wall 2B. The angle θ2 of the inner inclined surface 2b parallel to the outer inclined surface 1b of the container 1 is 52 degrees, and the distance from the inclined start end 2b ′ of the inner inclined surface 2b to the outer peripheral surface of the vertical wall 2B is 8 mm.

これら容器１とキャップ状の蓋２とは、容器１の開口部にキャップ状の蓋２を被せた状態において保持し、更にキャップ状の蓋２の上部に所定の厚味（本実施例では９ｍｍ）の加圧用ガラス３を載置する。   The container 1 and the cap-shaped lid 2 are held in a state in which the opening of the container 1 is covered with the cap-shaped lid 2, and a predetermined thickness (9 mm in this embodiment) is formed on the upper portion of the cap-shaped lid 2. The pressure glass 3) is placed.

４はレーザー光を集束する光学系であり、レーザー光を容器１の垂直壁１Ａの上端面又はこれから僅かに離れた所要深さの位置（本実施例では０．５ｍｍ）に焦点が合うように集束して照射するようになすものである。また、該光学系４は本実施例では直径３２．３６ｍｍの円筒形光学レンズを用いている。尚、これ以外のレンズを用いるようにしてもよい。また、該円筒形光学レンズ４は、前記加圧用ガラス３の上方において、該加圧用ガラス３から１９．７８ｍｍ離して配設している。   Reference numeral 4 denotes an optical system for focusing the laser beam so that the laser beam is focused on the upper end surface of the vertical wall 1A of the container 1 or a position at a required depth (0.5 mm in this embodiment) slightly away from this. It is designed to focus and irradiate. The optical system 4 uses a cylindrical optical lens having a diameter of 32.36 mm in this embodiment. A lens other than this may be used. The cylindrical optical lens 4 is disposed above the pressurizing glass 3 and separated from the pressurizing glass 3 by 19.78 mm.

５はレーザー光源であり、前記光学系である円筒形光学レンズ４と平行して配設し、本実施例においてはレーザー光を帯状に放射するものを用いている。６はレーザー光である。また、該レーザー光源５は、前記加圧用ガラス３の上方において、該加圧用ガラス３から７５．９７ｍｍ離して配設している。また、該レーザー光源５は、図示はしないが可撓性のある光ファイバーを用いて前記光学系４に接続するようにしてもよい。そしてまた、本実施例にいては、レーザー光６が５．０８ｍｍに集束された位置（図１中６Ａの位置）が溶着に最も有効なレーザーエネルギー密度となり、この集束された位置を、容器１の垂直壁１Ａの上端面又はこれから僅かに離れた所要深さの位置（本実施例では０．５ｍｍ）に合わせるものである。尚、レーザー光のエネルギーは、この集束された位置を過ぎると次第に減衰する。   Reference numeral 5 denotes a laser light source, which is arranged in parallel with the cylindrical optical lens 4 which is the optical system, and in the present embodiment, a laser light emitting element is used. 6 is a laser beam. The laser light source 5 is disposed above the pressurizing glass 3 and separated from the pressurizing glass 3 by 75.97 mm. The laser light source 5 may be connected to the optical system 4 using a flexible optical fiber (not shown). In this embodiment, the position where the laser beam 6 is focused to 5.08 mm (position 6A in FIG. 1) is the laser energy density most effective for welding, and this focused position is determined as the container 1 The vertical wall 1A is adjusted to the upper end surface or a position of a required depth slightly separated from the upper end surface (0.5 mm in this embodiment). Note that the energy of the laser light gradually attenuates after passing the focused position.

次に、上記実施例による溶着方法について説明する。
レーザー光源５からのレーザー光６を光学系４によって集束し、加圧用ガラス３及びキャップ状の蓋２を介して容器１の垂直壁１Ａの上端面に照射する。このときに於けるレーザー光６の状態は、図３に示す通りであり、キャップ状の蓋２内に入射したレーザー光６のうち、蓋２の垂直壁２Ｂの内側傾斜面２ｂに当たったものは全反射して垂直壁２Ｂの外側に屈折し、容器１の垂直壁１Ａの外側傾斜面１ｂには殆ど入射しない。したがって、この部分は発熱しない。そして、蓋２内に入射したレーザー光６のうちの一部が容器１の垂直壁１Ａの上端面におけるフラット部分１ａに照射されることになる。これにより該部分のみが発熱して溶融することになるものである。 Next, the welding method according to the above embodiment will be described.
The laser beam 6 from the laser light source 5 is focused by the optical system 4 and irradiated to the upper end surface of the vertical wall 1A of the container 1 through the pressurizing glass 3 and the cap-shaped lid 2. The state of the laser beam 6 at this time is as shown in FIG. 3 and the laser beam 6 incident on the cap-shaped lid 2 hits the inner inclined surface 2b of the vertical wall 2B of the lid 2. Is totally reflected and refracted outside the vertical wall 2B, and hardly enters the outer inclined surface 1b of the vertical wall 1A of the container 1. Therefore, this part does not generate heat. A part of the laser beam 6 incident on the lid 2 is irradiated to the flat portion 1 a on the upper end surface of the vertical wall 1 </ b> A of the container 1. As a result, only the portion generates heat and melts.

そしてまた、本実施例においては、レーザー光源５を固定し、加圧用ガラス３、蓋２並びに容器１を一体的に水平方向に移動させ、レーザー光６の照射部分をずらしているが、これを逆にしてレーザー光源５を移動するようにしてもよい。   In this embodiment, the laser light source 5 is fixed, the pressurizing glass 3, the lid 2 and the container 1 are integrally moved in the horizontal direction, and the irradiated portion of the laser light 6 is shifted. Conversely, the laser light source 5 may be moved.

また、容器１と蓋２の間において、容器１の開口部の一部に接合しない部分を残す必要がある場合には、容器１の垂直壁１Ａの上端面のフラット部分１ａにおける所要箇所を所要の深さ（上端面から０．５ｍｍ以上の深さ）及び長さに亘って窪ませておけばよく、これにより該部分は発熱せず、もって溶融しない。   In addition, when it is necessary to leave a portion that is not joined to a part of the opening of the container 1 between the container 1 and the lid 2, a required portion of the flat portion 1a on the upper end surface of the vertical wall 1A of the container 1 is required. (The depth of 0.5 mm or more from the upper end surface) and the length of the groove may be recessed, so that the portion does not generate heat and does not melt.

本発明の一実施例に係るレーザー溶着方法の説明図である。It is explanatory drawing of the laser welding method which concerns on one Example of this invention. 樹脂材料からなる蓋付容器の溶着前の状態の断面図である。It is sectional drawing of the state before welding of the container with a lid which consists of resin materials. レーザー光の照射状態を示す部分拡大断面図である。It is a partial expanded sectional view which shows the irradiation state of a laser beam.

符号の説明Explanation of symbols

１ 光吸収性の樹脂材料からなる容器
１Ａ 垂直壁
１ａ フラット部分
１ｂ 外側傾斜面
２ 光透過性の樹脂材料からなるキャップ状の蓋
２Ａ 天壁
２Ｂ 垂直壁
２ｂ 内側傾斜面
３ 加圧用ガラス
４ 光学系
５ レーザー光源
６ レーザー光
DESCRIPTION OF SYMBOLS 1 Container made of light-absorbing resin material 1A Vertical wall 1a Flat portion 1b Outside inclined surface 2 Cap-shaped lid made of light-transmitting resin material 2A Top wall 2B Vertical wall 2b Inner inclined surface 3 Glass for pressure 4 Optical system 5 Laser light source 6 Laser light

Claims (2)

光透過性の樹脂材料と、光吸収性の樹脂材料とを接触させて加圧保持し、レーザー光を光透過性の樹脂材料を介して光吸収性の樹脂材料の一部に照射し、該光吸収性の樹脂材料の照射部分にレーザー光のエネルギーを吸収させることによって発熱、溶融させると共に、その熱の一部を照射部分に接触している光透過性の樹脂材料の一部に与えてその部分の温度を上昇させて溶融、融合させ、その後融合部分を冷却、固化させてこれら光透過性の樹脂材料と光吸収性の樹脂材料とを結合する複数の樹脂材料のレーザー溶着方法において、光吸収性の樹脂材料は、光透過性の樹脂材料との接触側部分を、縦断面形状において、端面に溶融すべき所要範囲のフラット部分を残して３６度乃至４１度の傾斜面となし、一方、光透過性の樹脂材料は、光吸収性の樹脂材料との接触側部分を、縦断面形状において、光吸収性の樹脂材料の端面におけるフラット部分に接触するフラット部分と、これに連なる、光吸収性の樹脂材料の傾斜面と平行する傾斜面となし、これら光透過性の樹脂材料と光吸収性の樹脂材料とを、光透過性の樹脂材料のフラット部分に対して光吸収性の樹脂材料のフラットな端面が当接するよう直交状態に接触させ、レーザー光を、光学系により光吸収性の樹脂材料の端面又はこれから僅かに離れた所要深さの位置に焦点が合うように集束して照射するようになしたことを特徴とする複数の樹脂材料のレーザー溶着方法。   A light-transmitting resin material and a light-absorbing resin material are brought into contact with each other and held under pressure, and a part of the light-absorbing resin material is irradiated with laser light through the light-transmitting resin material. The irradiated part of the light-absorbing resin material absorbs the energy of the laser beam to generate heat and melt, and a part of the heat is given to a part of the light-transmitting resin material in contact with the irradiated part. In the laser welding method of a plurality of resin materials in which the temperature of the part is raised and melted and fused, and then the fused part is cooled and solidified to bond the light-transmitting resin material and the light-absorbing resin material. The light-absorbing resin material has a contact side portion with the light-transmitting resin material, in a longitudinal cross-sectional shape, and an inclined surface of 36 ° to 41 °, leaving a flat portion of a required range to be melted on the end surface, On the other hand, a light-transmitting resin material is light The contact side portion with the absorptive resin material is parallel to the flat portion in contact with the flat portion at the end surface of the light-absorbing resin material and the inclined surface of the light-absorbing resin material connected to the flat portion in the longitudinal cross-sectional shape. The light-transmitting resin material and the light-absorbing resin material are orthogonal to each other so that the flat end surface of the light-absorbing resin material comes into contact with the flat portion of the light-transmitting resin material. It is characterized in that the laser beam is focused and irradiated so that the laser beam is focused on the end surface of the light-absorbing resin material or a position at a required depth slightly away from it by an optical system. Laser welding method for a plurality of resin materials. 光吸収性の樹脂材料か容器であり、光透過性の樹脂材料が前記容器の開口部に被せるキャップ状の蓋である請求項１記載の複数の樹脂材料のレーザー溶着方法。
The laser welding method for a plurality of resin materials according to claim 1, wherein the resin material is a light-absorbing resin material or a container, and the light-transmitting resin material is a cap-shaped lid that covers the opening of the container.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013001432A (en) * 2011-06-17 2013-01-07 Toyo Seikan Kaisha Ltd Laser-welded sealed container and method of manufacturing the same
WO2017153493A1 (en) * 2016-03-11 2017-09-14 Aft Automotive Gmbh Method for producing a moulded part assembly and corresponding production device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013001432A (en) * 2011-06-17 2013-01-07 Toyo Seikan Kaisha Ltd Laser-welded sealed container and method of manufacturing the same
WO2017153493A1 (en) * 2016-03-11 2017-09-14 Aft Automotive Gmbh Method for producing a moulded part assembly and corresponding production device

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