JP2008023911A - 透明樹脂溶着方法 - Google Patents
透明樹脂溶着方法 Download PDFInfo
- Publication number
- JP2008023911A JP2008023911A JP2006201065A JP2006201065A JP2008023911A JP 2008023911 A JP2008023911 A JP 2008023911A JP 2006201065 A JP2006201065 A JP 2006201065A JP 2006201065 A JP2006201065 A JP 2006201065A JP 2008023911 A JP2008023911 A JP 2008023911A
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- JP
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- Prior art keywords
- laser light
- absorbing material
- light absorbing
- resin member
- bonding
- Prior art date
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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
- B29C65/1603—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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C65/16—Laser beams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C65/1661—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined scanning repeatedly, e.g. quasi-simultaneous laser welding
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
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- 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
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Abstract
【解決手段】接合前処理工程におけるレーザ光吸収材料3の単位面積当たりの入熱量は、接合本工程におけるレーザ光吸収材料3の単位面積当たりの入熱量より小さくなっている。このような条件下の接合前処理工程において、第1及び第2の樹脂部材1,2にレーザ光吸収材料3が馴染むように、第1又は第2の樹脂部材1,2を透過したレーザ光がレーザ光吸収材料3に照射される。このような馴染み処理を行った後、入熱量を大きくした状態で、レーザ光をレーザ光吸収材料3に再照射して接合本工程を行うと、馴染ませ工程で達成されたレーザ光吸収材料3の略均一な分布によって、接合本工程において深さ方向及び幅方向で均一な加熱が行われ、これによって強固で且つ確実な溶接が達成される。
【選択図】図3
Description
第1の樹脂部材の表面にレーザ光吸収材料を塗布する工程と、レーザ光吸収材料を挟み込むように、第1の樹脂部材と第2の樹脂部材とを重ね合わせる工程と、重ね合わせ工程後、第1又は第2の樹脂部材を透過するレーザ光を、レーザ光吸収材料に照射して、レーザ光吸収材料を第1及び第2の樹脂部材に馴染ませる接合前処理工程と、馴染ませ工程後、第1又は第2の樹脂部材を透過するレーザ光をレーザ光吸収材料に再度照射する接合本工程とを備え、
接合前処理工程におけるレーザ光吸収材料の単位面積当たりの入熱量は、接合本工程におけるレーザ光吸収材料の単位面積当たりの入熱量より小さいことを特徴とする。
第1の樹脂部材の表面にレーザ光吸収材料を塗布する工程と、レーザ光吸収材料にレーザ光を照射して、レーザ光吸収材料を第1の樹脂部材に馴染ませる接合前処理工程と、レーザ光吸収材料を挟み込むように、第1の樹脂部材と第2の樹脂部材とを重ね合わせる工程と、重ね合わせ工程後、第1又は第2の樹脂部材を透過するレーザ光をレーザ光吸収材料に再度照射する接合本工程とを備え、
接合前処理工程におけるレーザ光吸収材料の単位面積当たりの入熱量は、接合本工程におけるレーザ光吸収材料の単位面積当たりの入熱量より小さいことを特徴とする。
図1に示すように、透明な第1の樹脂部材1と透明な第2の樹脂部材2とをレーザ光Lによって溶接(溶着)する際、赤外線波長のレーザ光Lが利用される。第1の樹脂部材1の端部と第2の樹脂部材2の端部とを重ね合わせ、重ね合わせ部分Wで、第1の樹脂部材1の端部と第2の樹脂部材2の端部とでレーザ光吸収材料3を挟み込む。例えば、下側に位置する第1の樹脂部材1の端部にレーザ光吸収材料3を塗り広げ、その後、第2の樹脂部材2の端部をレーザ光吸収材料3上に載せる。
この実施形態において、透明な第1の樹脂部材10と透明な第2の樹脂部材20とをレーザ光Lによって溶接(溶着)する際、レーザ光吸収材料30と赤外線波長のレーザ光Lとが利用される。
厚み2mmのPETからなる第1の樹脂部材と第2の樹脂部材との間に赤外線吸収色素を塗布し、φ2.4mmのスポット径をもった赤外線波長のレーザ光を利用して、第1の樹脂部材と第2の樹脂部材とを溶着させた。以下、従来例と前述の第1の実施形態との実験結果を比較する。
Claims (6)
- 透明な第1の樹脂部材と透明な第2の樹脂部材とをレーザ光によって溶着させる透明樹脂溶着方法において、
前記第1の樹脂部材の表面にレーザ光吸収材料を塗布する工程と、
前記レーザ光吸収材料を挟み込むように、前記第1の樹脂部材と前記第2の樹脂部材とを重ね合わせる工程と、
前記重ね合わせ工程後、前記第1又は第2の樹脂部材を透過する前記レーザ光を、前記レーザ光吸収材料に照射して、前記レーザ光吸収材料を前記第1及び第2の樹脂部材に馴染ませる接合前処理工程と、
前記馴染ませ工程後、前記第1又は第2の樹脂部材を透過する前記レーザ光を前記レーザ光吸収材料に再度照射する接合本工程とを備え、
前記接合前処理工程における前記レーザ光吸収材料の単位面積当たりの入熱量は、前記接合本工程における前記レーザ光吸収材料の単位面積当たりの入熱量より小さいことを特徴とする透明樹脂溶着方法。 - 透明な第1の樹脂部材と透明な第2の樹脂部材とをレーザ光によって溶着させる透明樹脂溶着方法において、
前記第1の樹脂部材の表面にレーザ光吸収材料を塗布する工程と、
前記レーザ光吸収材料に前記レーザ光を照射して、前記レーザ光吸収材料を前記第1の樹脂部材に馴染ませる接合前処理工程と、
前記レーザ光吸収材料を挟み込むように、前記第1の樹脂部材と前記第2の樹脂部材とを重ね合わせる工程と、
前記重ね合わせ工程後、前記第1又は第2の樹脂部材を透過する前記レーザ光を前記レーザ光吸収材料に再度照射する接合本工程とを備え、
前記接合前処理工程における前記レーザ光吸収材料の単位面積当たりの入熱量は、前記接合本工程における前記レーザ光吸収材料の単位面積当たりの入熱量より小さいことを特徴とする透明樹脂溶着方法。 - 前記第1の樹脂部材の前記表面に前記レーザ光吸収材料を塗布した後、前記レーザ光吸収材料を、仮押さえ部材と前記第1の樹脂部材とで挟み込み、前記仮押さえ部材又は前記第1の樹脂部材を透過する前記レーザ光を前記レーザ光吸収材料に照射して、前記レーザ光吸収材料を前記第1の樹脂部材に馴染ませることを特徴とする請求項2記載の透明樹脂溶着方法。
- 前記レーザ光の出力を一定にした状態で、前記接合前処理工程における前記レーザ光の走査速度は、前記接合本工程における前記レーザ光の走査速度より大きいことを特徴とする請求項1〜3の何れか一項記載の透明樹脂溶着方法。
- 前記レーザ光の走査速度を一定にした状態で、前記接合前処理工程における前記レーザ光の出力は、前記接合本工程における前記レーザ光の出力より小さいことを特徴とする請求項1〜3の何れか一項記載の透明樹脂溶着方法。
- 前記レーザ光吸収材料は、赤外線吸収色素を含有したインクからなることを特徴とする請求項1〜5の何れか一項記載の透明樹脂溶着方法。
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