JP2005199667A - レーザ溶着部材の製造方法 - Google Patents
レーザ溶着部材の製造方法 Download PDFInfo
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- JP2005199667A JP2005199667A JP2004011050A JP2004011050A JP2005199667A JP 2005199667 A JP2005199667 A JP 2005199667A JP 2004011050 A JP2004011050 A JP 2004011050A JP 2004011050 A JP2004011050 A JP 2004011050A JP 2005199667 A JP2005199667 A JP 2005199667A
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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
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Abstract
【解決手段】本発明のレーザ溶着部材の製造方法は、レーザLを透過する透過性樹脂板11とレーザを実質的に透過せずに吸収する吸収性樹脂板12とをレーザ溶着する際に、透過性樹脂板11または吸収性樹脂板12の少なくとも一方に、レーザが照射されたときにできる溶融領域の少なくとも一部に連通する開口孔111を予め形成しておくことを特徴とする。これにより、溶融した樹脂は開口孔へ流れ込み凝固して、その開口孔の少なくとも一部を閉塞する。その閉塞状況を判断することでレーザ溶着の適否を確認できる。
【選択図】図1
Description
(1)開口孔
開口孔は、透過体および吸収体の両方に設けても良いし、いずれか一方のみに設けても良い。例えば、レーザは透過体側から照射するが、開口孔を吸収体側に設けても良い。但し、検査工程を行う場合、開口孔を透過体側に設けると、レーザを照射する側から検査工程を行えるので好都合である。
本発明でいう透過体および吸収体は、レーザ溶着が可能である限り、その材質を問わないが、特に樹脂材のレーザ溶着が重要である。そこで、透過体は、レーザを透過する透過性樹脂部品であり、吸収体は、レーザを吸収する吸収性樹脂部品であると好ましい。さらに、それらの少なくとも一方が熱可塑性樹脂材からなるとより好ましい。熱可塑性樹脂材であれば、レーザ照射により容易に溶融状態にできる。そして、レーザ照射の停止後(または通過後)、その溶融樹脂は冷却、再凝固して溶着が完了する。この場合、本発明の溶着工程は、前記接触部の熱可塑性樹脂を加熱溶融させて透過体と吸収体とを接着する工程となる(請求項4)。
レーザは、種々のものを使用できるが、透過体や吸収体の材質、接合幅、生産性等を考慮して、波長や出力等の適当なものを選択する。このようなレーザとして、各種ガスレーザ、半導体レーザ等を用いることができる。代表的なものは、YAGレーザである。使用する波長は、透過体および吸収体の材質により異なるが、それらが樹脂製の場合、概ね808〜1064nm程度である。その出力は、数〜数数百Wである。溶着幅は、レーザの絞り(集光径)により変更できる。通常は、1〜5mmである。また、レーザの焦点は、接触部またはその近傍に合わせると良い。その焦点位置の調整により、加熱幅の制御も可能である。
レーザ溶着される樹脂部品として、PBTC(ポリブチレンテレフタレート)製の透過性樹脂板11(透過体、透過性樹脂部品)と、そのPCにカーボンブラックを混練して成形した黒色の吸収性樹脂板12(吸収体、吸収性樹脂部品)とを用意した。透過性樹脂板11と吸収性樹脂板12との厚さ(t)は共に1mmの平板である。透過性樹脂板11と吸収性樹脂板12とを溶着させてできるレーザ溶着部材1はエアバッグ用回路を収納するケースである。
11 透過性樹脂板
111 開口孔
12 吸収性樹脂板12
B 接触部
Y 溶融領域
G 押圧治具
L レーザ
Claims (6)
- レーザを透過する透過体と該レーザを実質的に透過せずに吸収する吸収体とを接触させて配置する配置工程と、
該透過体と該吸収体との接触部へ該透過体側から該レーザを照射し該接触部を加熱して、該透過体および該吸収体の少なくとも一方を溶融させ該透過体と該吸収体とを接着させる溶着工程とからなるレーザ溶着部材の製造方法において、
前記透過体および/または前記吸収体には、前記レーザが照射されたときに溶融してできる溶融領域の少なくとも一部に連通する開口孔が予め形成されていることを特徴とするレーザ溶着部材の製造方法。 - 前記開口孔は、前記透過体に形成されている請求項1に記載のレーザ溶着部材の製造方法。
- 前記溶着工程は、前記開口孔の開口を前記溶融領域よりも上方にして行う工程である請求項1に記載のレーザ溶着部材の製造方法。
- 前記透過体および前記吸収体の少なくとも一方は熱可塑性樹脂からなり、
前記溶着工程は、前記接触部の該熱可塑性樹脂を加熱溶融させて前記透過体と前記吸収体とを接着する工程である請求項1に記載のレーザ溶着部材の製造方法。 - 前記溶着工程は、前記接触部またはその近傍を密着状態とする密着工程を含む請求項1に記載のレーザ溶着部材の製造方法。
- さらに、前記溶着工程後の前記開口孔の閉塞状況により前記透過体と前記吸収体との溶着具合を検査する検査工程を備える請求項1に記載のレーザ溶着部材の製造方法。
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JP2009056722A (ja) * | 2007-08-31 | 2009-03-19 | Canon Inc | レーザ溶着ユニット及びレーザ溶着方法 |
WO2012105653A1 (ja) * | 2011-02-02 | 2012-08-09 | 株式会社ブリヂストン | タイヤ、及びタイヤの製造方法 |
CN104626543A (zh) * | 2015-01-12 | 2015-05-20 | 中国科学院宁波材料技术与工程研究所 | 热塑性复合材料的焊接方法 |
JP2019502078A (ja) * | 2015-12-14 | 2019-01-24 | ウィルマーク ホールディングス, エルエルシー | 同心状に層化された材料のレーザ誘発シール |
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EP3390879A4 (en) * | 2015-12-14 | 2019-08-07 | WilMarc Holdings, LLC | LASER-INDUCED SEALING OF CONCENTRICALLY SHAPED MATERIALS |
US10794523B2 (en) | 2015-12-14 | 2020-10-06 | Wilmarc Holdings, Llc | Laser induced sealing of concentrically layered materials |
US11608926B2 (en) | 2015-12-14 | 2023-03-21 | Wilmarc Holdings, Llc | Laser induced sealing of concentrically layered materials |
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