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JP2001105499A - Laser welding method for resin material - Google Patents

Laser welding method for resin material

Info

Publication number
JP2001105499A
JP2001105499A JP28563799A JP28563799A JP2001105499A JP 2001105499 A JP2001105499 A JP 2001105499A JP 28563799 A JP28563799 A JP 28563799A JP 28563799 A JP28563799 A JP 28563799A JP 2001105499 A JP2001105499 A JP 2001105499A
Authority
JP
Japan
Prior art keywords
resin material
transparent resin
laser
transmitting resin
transmittance
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.)
Granted
Application number
JP28563799A
Other languages
Japanese (ja)
Other versions
JP3630293B2 (en
Inventor
Hideo Nakamura
秀生 中村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP28563799A priority Critical patent/JP3630293B2/en
Publication of JP2001105499A publication Critical patent/JP2001105499A/en
Application granted granted Critical
Publication of JP3630293B2 publication Critical patent/JP3630293B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • 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
    • B29C65/1635—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
    • B29C65/1638—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 focusing the laser beam on the interface
    • 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
    • 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
    • B29C65/1677—Laser beams making use of an absorber or impact modifier
    • 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
    • B29C66/1122—Single lap to lap joints, i.e. overlap 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • 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
    • 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
    • B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
    • B29C65/1612—Infrared [IR] radiation, e.g. by infrared lasers
    • B29C65/1616—Near infrared radiation [NIR], e.g. by YAG lasers
    • 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
    • B29C66/71—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 composition of the plastics material of the parts to be joined
    • 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
    • B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • 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
    • B29K2309/00—Use of inorganic materials not provided for in groups B29K2303/00 - B29K2307/00, as reinforcement
    • B29K2309/08—Glass

Landscapes

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

Abstract

PROBLEM TO BE SOLVED: To control the energy loss of laser beams when the laser beams are transmitted inside a transmitting resin material and achieve the sufficient welding strength. SOLUTION: A transmitting resin material 1 having laser beams as a heat source and a non-transmitting resin material 2 not having transmittance for the laser beams are overlapped together, and then the laser beams are emitted from the side of the transmitting resin material to heat weld the joining face of the transmitting resin material 1 with the non-transmitting resin material 2 and join integrally both. At that time, the laser beams having the wavelength providing the 26% or more transmittance in the transmitting resin material 1 is used as a heat source. Thus the energy loss of the laser beams transmitted in the transmitting resin material 1 is reduced to generate sufficient heat melting on the joining surface and achieve to obtain the sufficient strength.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は樹脂材のレーザ溶着
方法に関し、詳しくは、重ね合わせた樹脂材の接合面を
溶着加熱源としてのレーザ光により加熱溶融させて、両
者を一体的に接合する樹脂材のレーザ溶着方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for laser welding a resin material. More specifically, the present invention relates to a method for heating and melting a joining surface of superposed resin materials by using a laser beam as a welding heating source to integrally join the two. The present invention relates to a laser welding method for a resin material.

【０００２】[0002]

【従来の技術】樹脂材同士の接合方法として、従来より
レーザ溶着方法が利用されている。例えば、特開昭６０
−２１４９３１号公報には、レーザ光に対して透過性の
ある透過樹脂材と、該レーザ光に対して透過性のない非
透過樹脂材とを重ね合わせた後、該透過樹脂材側からレ
ーザ光を照射することにより、透過樹脂材と非透過樹脂
材との接合面を加熱溶融させて両者を一体的に接合する
レーザ溶着方法が開示されている。2. Description of the Related Art As a joining method of resin materials, a laser welding method has been conventionally used. For example, JP
No. 2,149,311 discloses that after a transparent resin material that is transparent to a laser beam and a non-transparent resin material that is not transparent to the laser beam are overlapped, the laser beam is transmitted from the transparent resin material side. A laser welding method is disclosed, in which a laser beam is irradiated to heat and melt the joint surface between the transparent resin material and the non-transparent resin material to join them together.

【０００３】このレーザ溶着方法では、透過樹脂材内を
透過したレーザ光が非透過樹脂材の接合面に到達して吸
収され、この接合面に吸収されたレーザ光がエネルギー
として蓄積される。その結果、非透過樹脂材の接合面が
加熱溶融されるとともに、この非透過樹脂材の接合面か
らの熱伝達により透過樹脂材の接合面が加熱溶融され
る。この状態で、透過樹脂材の接合面及び非透過樹脂材
の接合面同士を圧着させれば、両者を一体的に接合する
ことができる。In this laser welding method, a laser beam transmitted through a transparent resin material reaches a joint surface of a non-transparent resin material and is absorbed, and the absorbed laser light is accumulated as energy. As a result, the joint surface of the non-transparent resin material is heated and melted, and the joint surface of the transparent resin material is heated and melted by heat transfer from the joint surface of the non-permeable resin material. In this state, if the joining surface of the permeable resin material and the joining surface of the non-permeable resin material are pressed together, they can be integrally joined.

【０００４】[0004]

【発明が解決しようとする課題】しかしながら、上記従
来のレーザ溶着方法では、透過樹脂材内を透過する際の
レーザ光のエネルギーロスが大きければ、非透過樹脂材
及び透過樹脂材の接合面における加熱溶融が不十分とな
り、十分な溶着強度を達成することができないという問
題がある。However, in the above-mentioned conventional laser welding method, if the energy loss of the laser beam when transmitting through the transparent resin material is large, the heating at the joint surface between the non-transparent resin material and the transparent resin material is performed. There is a problem that melting is insufficient and sufficient welding strength cannot be achieved.

【０００５】本発明は上記実情に鑑みてなされたもので
あり、透過樹脂材内を透過する際のレーザ光のエネルギ
ーロスを抑えて、十分な溶着強度を達成することのでき
る樹脂材のレーザ溶着方法を提供することを解決すべき
技術課題とするものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is intended to reduce the energy loss of laser light when transmitting through a transparent resin material and to achieve laser welding of a resin material capable of achieving sufficient welding strength. Providing a method is a technical problem to be solved.

【０００６】[0006]

【課題を解決するための手段】上記課題を解決する本発
明の樹脂材のレーザ溶着方法は、加熱源としてのレーザ
光に対して透過性のある透過樹脂材と、該レーザ光に対
して透過性のない非透過樹脂材とを重ね合わせた後、該
透過樹脂材側から該レーザ光を照射することにより、該
透過樹脂材と該非透過樹脂材との接合面を加熱溶融させ
て両者を一体的に接合する樹脂材のレーザ溶着方法にお
いて、上記透過樹脂材内の透過率が２６％以上となるよ
うな波長を有するレーザ光を加熱源として用いることを
特徴とする樹脂材のレーザ溶着方法。A laser welding method for a resin material according to the present invention, which solves the above-mentioned problems, comprises a transparent resin material having a transmittance to a laser beam as a heating source, and a laser beam having a transmittance to the laser beam. After superimposing a non-transmissive resin material having no impermeability, the laser beam is irradiated from the side of the transmissive resin material to heat and fuse the joining surface between the transmissive resin material and the non-transparent resin material, thereby integrating the two. A laser welding method for a resin material, wherein a laser beam having a wavelength such that the transmittance in the transparent resin material is 26% or more is used as a heating source.

【０００７】[0007]

【発明の実施の形態】本発明の樹脂材のレーザ溶着方法
では、加熱源としてのレーザ光に対して透過性のある透
過樹脂材と、該レーザ光に対して透過性のない非透過樹
脂材とを重ね合わせ、該透過樹脂材側からレーザ光を照
射する。透過樹脂材側から照射されたレーザ光は該透過
樹脂材内を透過して非透過樹脂材の接合面に到達し、吸
収される。この非透過樹脂材の接合面に吸収されたレー
ザ光がエネルギーとして蓄積される結果、非透過樹脂材
の接合面が加熱溶融されるとともに、この非透過樹脂材
の接合面からの熱伝達により透過樹脂材の接合面が加熱
溶融される。この状態で、透過樹脂材の接合面及び非透
過樹脂材の接合面同士を圧着させれば、両者を一体的に
接合することができる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the laser welding method of a resin material according to the present invention, a transparent resin material that is permeable to laser light as a heating source and a non-transparent resin material that is not permeable to the laser light And a laser beam is irradiated from the transparent resin material side. The laser light emitted from the transmitting resin material side passes through the transmitting resin material, reaches the joining surface of the non-transmitting resin material, and is absorbed. As a result, the laser light absorbed in the bonding surface of the non-transparent resin material is accumulated as energy, so that the bonding surface of the non-transmitting resin material is heated and melted, and is transmitted by heat transfer from the bonding surface of the non-transparent resin material. The joint surface of the resin material is heated and melted. In this state, if the joining surface of the permeable resin material and the joining surface of the non-permeable resin material are pressed together, they can be integrally joined.

【０００８】そして、本発明方法では、透過樹脂材内の
透過率が２６％以上となるような波長を有するレーザ光
を加熱源として用いる。このため、透過樹脂材側から照
射されたレーザ光は該透過樹脂材内を十分に透過し、透
過樹脂材内を透過するレーザ光のエネルギーロスが低減
される。したがって、透過樹脂材及び非透過樹脂材の接
合面を加熱溶融させるのに十分なエネルギーが該接合面
に蓄積され、その結果該接合面で十分な加熱溶融が起こ
り、十分な溶着強度を達成することが可能となる。In the method of the present invention, a laser beam having a wavelength such that the transmittance in the transparent resin material is 26% or more is used as a heating source. Therefore, the laser light emitted from the transparent resin material side sufficiently passes through the transparent resin material, and the energy loss of the laser light transmitted through the transparent resin material is reduced. Therefore, sufficient energy is accumulated in the bonding surface to heat and fuse the bonding surface between the permeable resin material and the non-permeable resin material, and as a result, sufficient heating and melting occurs at the bonding surface to achieve sufficient welding strength. It becomes possible.

【０００９】上記透過樹脂材の種類としては、熱可塑性
を有し、加熱源としてのレーザ光を所定の透過率以上で
透過させうるものであれば特に限定されない。例えば、
ナイロン６（ＰＡ６）やナイロン６，６（ＰＡ６６）等
のポリアミド（ＰＡ）、ポリエチレン（ＰＥ）、ポリプ
ロピレン（ＰＰ）やスチレン−アクリロニトリル共重合
体等を挙げることができる。なお、必要に応じて、ガラ
ス繊維等で強化したものや着色したものを用いてもよ
い。The type of the transparent resin material is not particularly limited as long as it has thermoplasticity and can transmit a laser beam as a heating source at a predetermined transmittance or higher. For example,
Examples thereof include polyamide (PA) such as nylon 6 (PA6) and nylon 6,6 (PA66), polyethylene (PE), polypropylene (PP), and styrene-acrylonitrile copolymer. If necessary, a material reinforced with glass fiber or the like or a colored material may be used.

【００１０】上記非透過樹脂材の種類としては、熱可塑
性を有し、加熱源としてのレーザ光を透過させずに吸収
しうるものであれば特に限定されない。例えば、ナイロ
ン６（ＰＡ６）やナイロン６，６（ＰＡ６６）等のポリ
アミド（ＰＡ）、ポリエチレン（ＰＥ）、ポリプロピレ
ン（ＰＰ）やスチレン−アクリロニトリル共重合体等
に、カーボンブラック等の所定の着色剤を混入したもの
を挙げることができる。なお、必要に応じて、ガラス繊
維等で強化したものを用いてもよい。The type of the non-transparent resin material is not particularly limited as long as it has thermoplasticity and can absorb laser light as a heating source without transmitting it. For example, a predetermined colorant such as carbon black is added to polyamide (PA) such as nylon 6 (PA6) or nylon 6,6 (PA66), polyethylene (PE), polypropylene (PP), or styrene-acrylonitrile copolymer. There may be mentioned mixed ones. In addition, you may use the thing reinforced with glass fiber etc. as needed.

【００１１】加熱源として用いるレーザ光の種類として
は、レーザ光を透過させる透過樹脂材の吸収スペクトル
や板厚（透過長）等との関係で、透過樹脂材内での透過
率が２６％以上となるような波長を有するものが適宜選
定される。例えば、ガラス繊維を３０ｗｔ％含有し、板
厚が１〜５ｍｍ程度のナイロン６を透過樹脂材として用
いた場合は、レーザ光の波長が１．５〜２．５μｍ程度
であれば、該透過樹脂材内での透過率が２６％以上とな
るので、かかる範囲内の波長を有する種々の半導体レー
ザやＨＦ化学レーザ等を用いることができる。The type of the laser light used as the heating source is such that the transmittance in the transparent resin material is 26% or more depending on the absorption spectrum and the plate thickness (transmission length) of the transparent resin material transmitting the laser light. One having a wavelength such that the following is selected as appropriate. For example, when nylon 6 containing 30 wt% of glass fiber and having a thickness of about 1 to 5 mm is used as the transparent resin material, if the wavelength of the laser beam is about 1.5 to 2.5 μm, Since the transmittance in the material is 26% or more, it is possible to use various semiconductor lasers, HF chemical lasers, and the like having wavelengths within such a range.

【００１２】なお、レーザの出力や加工速度（移動速
度）等の照射条件は、透過樹脂材及び非透過樹脂材の種
類等に応じて適宜設定可能である。The irradiation conditions such as the output of the laser and the processing speed (moving speed) can be appropriately set according to the types of the transparent resin material and the non-transparent resin material.

【００１３】[0013]

【実施例】以下、実施例により本発明を具体的に説明す
る。The present invention will be described below in detail with reference to examples.

【００１４】ガラス繊維が３０ｗｔ％添加されて強化さ
れたナイロン６からなり、加熱源としてのレーザ光に対
して透過性のある板厚３ｍｍの透過樹脂材１と、カーボ
ンブラックが所定量添加されたナイロン６からなり、加
熱源としてのレーザ光に対して透過性のない板厚３ｍｍ
の非透過樹脂材２とを準備した。一方、波長が１．０６
μｍのＹＡＧ：Ｎｄ3+レーザ光を発するレーザトーチ３
を準備した。A transparent resin material 1 made of nylon 6 reinforced by adding 30 wt% of glass fiber and having a thickness of 3 mm which is transparent to a laser beam as a heating source, and a predetermined amount of carbon black are added. Made of nylon 6, 3 mm thick with no permeability to laser light as a heating source
Was prepared. On the other hand, if the wavelength is 1.06
Laser torch 3 emitting μm YAG: Nd 3+ laser light
Was prepared.

【００１５】そして、図１に示すように、非透過樹脂材
２の上に透過樹脂材１を重ね合わせるとともに、透過樹
脂材１及び非透過樹脂材２を図示しないクランプ手段で
クランプした。この状態で、レーザトーチ３を透過樹脂
材１側から照射して、透過樹脂材１と非透過樹脂材２と
をレーザ溶着により一体的に接合した。なお、レーザの
出力は４００Ｗ、加工速度は４ｍ／ｍｉｎとした。Then, as shown in FIG. 1, the permeable resin material 1 was superimposed on the opaque resin material 2, and the permeable resin material 1 and the opaque resin material 2 were clamped by clamping means (not shown). In this state, the laser torch 3 was irradiated from the transparent resin material 1 side, and the transparent resin material 1 and the non-transparent resin material 2 were integrally joined by laser welding. The output of the laser was 400 W and the processing speed was 4 m / min.

【００１６】上記レーザトーチ３から発せられたレーザ
光が透過樹脂材１を透過する際の透過率を測定したとこ
ろ、４０％であった。また、透過樹脂材１と非透過樹脂
材２との溶着強度を測定したところ、５０ＭＰａであっ
た。When the transmittance of the laser beam emitted from the laser torch 3 when passing through the transparent resin material 1 was measured, it was 40%. Further, when the welding strength between the permeable resin material 1 and the non-permeable resin material 2 was measured, it was 50 MPa.

【００１７】なお、透過率は、入射エネルギーをワーク
有無で算出することにより測定し、溶着強度は、溶着部
を引張り破断することにより測定した。The transmittance was measured by calculating the incident energy with or without the work, and the welding strength was measured by breaking the welded portion by pulling.

【００１８】（レーザの透過率と溶着強度との関係）上
記実施例において、透過樹脂材１に着色剤としての染料
を添加し、その添加量を種々変更することにより、透過
樹脂材１におけるレーザ光の透過率を種々変更して、透
過樹脂材１におけるレーザ光の透過率と溶着強度との関
係を調べた。その結果を図２に示す。(Relationship Between Laser Transmittance and Welding Strength) In the above embodiment, a dye as a coloring agent was added to the transparent resin material 1 and the amount of the dye was changed variously, whereby the laser in the transparent resin material 1 was changed. The relationship between the transmittance of the laser beam and the welding strength in the transparent resin material 1 was examined by variously changing the light transmittance. The result is shown in FIG.

【００１９】図２から明らかなように、透過樹脂材１に
おけるレーザ光の透過率が２６％以上あれば、溶着強度
が４５ＭＰａ以上となり、十分な溶着強度を達成できる
ことがわかる。As is apparent from FIG. 2, if the transmittance of the laser beam in the transparent resin material 1 is 26% or more, the welding strength becomes 45 MPa or more, and it is possible to achieve a sufficient welding strength.

【００２０】（レーザ光の波長と透過率との関係）ガラ
ス繊維が３０ｗｔ％添加されたナイロン６からなる透過
樹脂材１におけるレーザ光の透過率と、レーザ光の波長
との関係を、板厚１ｍｍ、３ｍｍ、５ｍｍの各透過樹脂
材１について調べた。その結果を図３に示す。(Relationship Between Laser Light Wavelength and Transmittance) The relationship between the laser light transmittance and the laser light wavelength in the transparent resin material 1 made of nylon 6 to which 30% by weight of glass fiber is added is shown by the plate thickness. The transmission resin material 1 of 1 mm, 3 mm, and 5 mm was examined. The result is shown in FIG.

【００２１】図３から明らかなように、レーザ光の波長
を１．５〜２．５μｍ程度とすれば、５ｍｍと厚い透過
樹脂材１であってもレーザ光の透過率が２６％以上とな
った。これに対し、波長が１．０６μｍであるＹＡＧ：
Ｎｄ3+レーザの場合、透過樹脂材１の板厚が５ｍｍ以上
に厚くなると、透過率が２４％程度以下になった。As is clear from FIG. 3, if the wavelength of the laser beam is set to about 1.5 to 2.5 μm, the transmittance of the laser beam becomes 26% or more even with the transmission resin material 1 as thick as 5 mm. Was. On the other hand, YAG having a wavelength of 1.06 μm:
In the case of the Nd 3+ laser, when the thickness of the transparent resin material 1 was increased to 5 mm or more, the transmittance was reduced to about 24% or less.

【００２２】したがって、ガラス繊維が３０ｗｔ％添加
されたナイロン６からなり、板厚５ｍｍ程度以下の透過
樹脂材１をレーザ溶着する場合は、レーザ光の波長を
１．５〜２．５μｍ程度とすることにより、透過樹脂材
１におけるレーザ光の透過率を２６％以上として十分な
溶着強度を達成できることが確認された。Therefore, when laser-welding a transparent resin material 1 made of nylon 6 to which glass fiber is added by 30 wt% and having a plate thickness of about 5 mm or less, the wavelength of the laser beam is about 1.5 to 2.5 μm. Thus, it was confirmed that a sufficient welding strength can be achieved by setting the transmittance of the laser beam in the transparent resin material 1 to 26% or more.

【００２３】[0023]

【発明の効果】以上詳述したように本発明の樹脂材のレ
ーザ溶着方法によれば、透過樹脂材内を透過するレーザ
光のエネルギーロスが低減されるので、透過樹脂材及び
非透過樹脂材の接合面で十分な加熱溶融が起こり、十分
な溶着強度を達成することが可能となる。As described above in detail, according to the laser welding method for a resin material of the present invention, the energy loss of the laser beam transmitted through the transparent resin material is reduced, so that the transparent resin material and the non-transparent resin material can be used. Thus, sufficient heat-melting occurs at the joint surface, and a sufficient welding strength can be achieved.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の一実施例に係り、樹脂材のレーザ溶着
方法を説明する概略断面図である。FIG. 1 is a schematic sectional view illustrating a laser welding method of a resin material according to an embodiment of the present invention.

【図２】透過樹脂材におけるレーザ光の透過率と溶着強
度との関係を示す線図である。FIG. 2 is a diagram showing a relationship between a laser beam transmittance and a welding strength in a transparent resin material.

【図３】レーザ光の波長と透過樹脂材におけるレーザ光
の透過率との関係を示す線図である。FIG. 3 is a diagram showing a relationship between a wavelength of a laser beam and a transmittance of the laser beam in a transparent resin material.

【符号の説明】[Explanation of symbols]

１…透過樹脂材 ２…非透過樹脂材 ３…レーザトーチ 1: Transparent resin material 2: Non-transparent resin material 3: Laser torch

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 加熱源としてのレーザ光に対して透過性
のある透過樹脂材と、該レーザ光に対して透過性のない
非透過樹脂材とを重ね合わせた後、該透過樹脂材側から
該レーザ光を照射することにより、該透過樹脂材と該非
透過樹脂材との接合面を加熱溶融させて両者を一体的に
接合する樹脂材のレーザ溶着方法において、 上記透過樹脂材内の透過率が２６％以上となるような波
長を有するレーザ光を加熱源として用いることを特徴と
する樹脂材のレーザ溶着方法。1. After laminating a transparent resin material that is permeable to laser light as a heating source and a non-transparent resin material that is not permeable to the laser light, from the side of the transparent resin material A method for laser welding a resin material in which a joint surface between the transparent resin material and the non-transmissive resin material is heated and melted by irradiating the laser beam, and the two are integrally joined. Laser welding of a resin material, wherein a laser beam having a wavelength such that is 26% or more is used as a heating source.
JP28563799A 1999-10-06 1999-10-06 Laser welding method of resin material Expired - Lifetime JP3630293B2 (en)

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Cited By (11)

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JP2004195829A (en) * 2002-12-19 2004-07-15 Sumitomo Heavy Ind Ltd Laser welding method and member to be welded
WO2004072175A1 (en) * 2003-02-13 2004-08-26 Orient Chemical Industries, Ltd. Laser light trnasmitting colored polyolefin resin compositions and process for laser welding
JP2005199667A (en) * 2004-01-19 2005-07-28 Denso Corp Manufacturing method of laser welded-member
WO2006009200A1 (en) * 2004-07-22 2006-01-26 Daicel Polymer, Ltd. Label for laser welding and composite molding
WO2006094305A1 (en) * 2005-03-03 2006-09-08 E.I. Dupont De Nemours And Company Laser welding apparatus and laser welding method
CN1305631C (en) * 2003-08-21 2007-03-21 莱斯特加工技术公司 Method and apparatus for simultaneous heating of materials
US7207634B2 (en) 2002-03-18 2007-04-24 Toyota Jidosha Kabushiki Kaisha Laser-welded assembly
CN100354113C (en) * 2003-06-11 2007-12-12 爱信精机株式会社 Process for laser welding resinous members, apparatus for the same and laser-welded resinous product
US7468848B2 (en) 2006-05-02 2008-12-23 Hoya Corporation Fixing method for resin lens
JP2010115013A (en) * 2008-11-06 2010-05-20 Mitsubishi Materials Cmi Corp Motor
JP2011240626A (en) * 2010-05-19 2011-12-01 Polyplastics Co Method of deciding welding condition

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JP2001071384A (en) * 1999-09-01 2001-03-21 Toyota Motor Corp Laser welding method for resin members

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JPH09510930A (en) * 1994-03-31 1997-11-04 マルクアルト ゲーエムベーハー Plastic work piece and method of manufacturing the same
JP2001071384A (en) * 1999-09-01 2001-03-21 Toyota Motor Corp Laser welding method for resin members

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7207634B2 (en) 2002-03-18 2007-04-24 Toyota Jidosha Kabushiki Kaisha Laser-welded assembly
JP2004195829A (en) * 2002-12-19 2004-07-15 Sumitomo Heavy Ind Ltd Laser welding method and member to be welded
US7732512B2 (en) 2003-02-13 2010-06-08 Orient Chemical Industries Co., Ltd. Laser light transmitting colored polyolefin resin compositions and process for laser welding
WO2004072175A1 (en) * 2003-02-13 2004-08-26 Orient Chemical Industries, Ltd. Laser light trnasmitting colored polyolefin resin compositions and process for laser welding
KR100842200B1 (en) * 2003-02-13 2008-06-30 오리엔트 가가쿠 고교 가부시키가이샤 Laser light transmitting colored polyolefin resin compositions and process for laser welding
CN100354113C (en) * 2003-06-11 2007-12-12 爱信精机株式会社 Process for laser welding resinous members, apparatus for the same and laser-welded resinous product
CN1305631C (en) * 2003-08-21 2007-03-21 莱斯特加工技术公司 Method and apparatus for simultaneous heating of materials
JP2005199667A (en) * 2004-01-19 2005-07-28 Denso Corp Manufacturing method of laser welded-member
JP4492784B2 (en) * 2004-01-19 2010-06-30 株式会社デンソー Laser welding member manufacturing method
WO2006009200A1 (en) * 2004-07-22 2006-01-26 Daicel Polymer, Ltd. Label for laser welding and composite molding
WO2006094305A1 (en) * 2005-03-03 2006-09-08 E.I. Dupont De Nemours And Company Laser welding apparatus and laser welding method
US7468848B2 (en) 2006-05-02 2008-12-23 Hoya Corporation Fixing method for resin lens
JP2010115013A (en) * 2008-11-06 2010-05-20 Mitsubishi Materials Cmi Corp Motor
JP2011240626A (en) * 2010-05-19 2011-12-01 Polyplastics Co Method of deciding welding condition

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