JP2007230051A - 樹脂溶着方法、樹脂部品 - Google Patents
樹脂溶着方法、樹脂部品 Download PDFInfo
- Publication number
- JP2007230051A JP2007230051A JP2006053560A JP2006053560A JP2007230051A JP 2007230051 A JP2007230051 A JP 2007230051A JP 2006053560 A JP2006053560 A JP 2006053560A JP 2006053560 A JP2006053560 A JP 2006053560A JP 2007230051 A JP2007230051 A JP 2007230051A
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- Prior art keywords
- resin
- laser beam
- rough surface
- welding method
- region
- Prior art date
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- 239000011347 resin Substances 0.000 title claims abstract description 93
- 229920005989 resin Polymers 0.000 title claims abstract description 93
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000003466 welding Methods 0.000 title claims abstract description 32
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 25
- 230000001678 irradiating effect Effects 0.000 claims abstract description 6
- 239000004065 semiconductor Substances 0.000 claims description 18
- 239000001569 carbon dioxide Substances 0.000 claims description 12
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 12
- 235000011089 carbon dioxide Nutrition 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004734 Polyphenylene sulfide Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229920006324 polyoxymethylene Polymers 0.000 description 2
- 229920000069 polyphenylene sulfide Polymers 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000113 methacrylic resin Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 150000003071 polychlorinated biphenyls Chemical group 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000010979 ruby Substances 0.000 description 1
- 229910001750 ruby Inorganic materials 0.000 description 1
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Classifications
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Abstract
【解決手段】本溶着方法は、樹脂板Wbに吸収性を有する第一のレーザ光(炭酸ガスレーザ)を照射して粗面領域Sを形成する第一工程と、粗面領域Sが当接面となるように他方側の樹脂板Waを重ね合わせる第二工程と、互いに重ね合わされた樹脂板Wa、Wbの粗面領域Sに向けて第二のレーザ光を照射して両樹脂部板Wa、Wbを熱溶着させる第三工程と、からなる。
【選択図】図1
Description
加えて、樹脂部材間に、それとは異なる材質の部材を介挿させれば、専用の工程が必要になり、また、部品点数も増えるのでコスト面でも不利になる。
本発明は上記のような事情に基づいて完成されたものであって、間に介在物を設けることなく、透明樹脂同士をレーザ光により溶着することを目的とする。
前記粗面領域が形成された一方の樹脂部材と、他方の樹脂部材とを、前記粗面領域が形成された表面が当接面となるように重ね合わせる第二工程と、互いに重ね合わされた樹脂部材同士の表面或いは、裏面側のいずれか一方から、前記当接面のうちの粗面領域が形成された部分に向けて、前記両樹脂部材に対して透過性を有する波長の第二のレーザ光を照射して両樹脂部材同士を熱溶着させる第三工程と、からなるところに特徴を有する。
請求項1並びに請求項6の発明によれば、溶着を行なうのに先立って、溶着対象としての透明樹脂部材(通常、光が透過してしまう材質)に吸収性を有する波長のレーザ光を照射して、表面を削り粗面領域を形成するようにした。このように、予め、粗面領域を設けておけば、あとは、両部材を重ね合わせ、その後、透過性を有する波長の第二のレーザ光を照射すると、粗面領域でレーザ光の散乱が起こる。すると、散乱が起こった部分では、光の吸収が起こり熱が発生するので、この熱で両樹脂部材同士を溶着させることが出来る。このような溶着方法であれば、両樹脂部材間に、レーザ光を吸収する介在物を設けなくても、溶着できる。従って、リサイクルも簡単に出来るし、コスト面においても優れる。
請求項2の発明によれば、第一のレーザ光は9μmから11μmの波長領域の中赤外レーザ光とし、第二のレーザ光は800nmから1100nmの波長領域の近赤外レーザ光とした。
請求項3の発明では、第1のレーザ光は、炭酸ガスレーザであり、第二のレーザ光は、半導体レーザとした。このような構成であれば、汎用のレーザ光源を使用できるので、装置の低コスト化に寄与する。
請求項4の発明によれば、樹脂部材の表面の一部に粗面領域を形成するとともに、第二のレーザ光を粗面領域にのみ照射することとした。このような溶着方法であれば、レーザ光の照射時間が最短で済む。従って、溶着工程にかかる時間を短くすることが出来る。
請求項5の発明によれば、熱溶着される部分の少なくとも一部に識別情報を含ませることとした。このような構成であれば、識別情報を印字する工程を廃止することが出来る。
本発明の実施形態1を図1ないし図10によって説明する。
1.レーザ溶着装置の全体構成
図1に示す符号Wa、Wbは溶着対象となる一対の透明樹脂板、符号Mはレーザ溶着装置である。レーザ溶着装置Mはレーザ発光部10、ガルバノスキャナ20、コントローラ30を主体として構成される。レーザ発光部10は炭酸ガスレーザ光源11、半導体レーザ光源12を備える。
透明樹脂板Wa、Wbの溶着は、以下に説明する第一工程、第二工程、第三工程の3つの工程により行なわれる(図4参照)。
まず、第一工程では、透明樹脂板Wbの上面に対して粗面領域Sが形成される。具体的に説明すると、まず、コントローラ30からの指令(切替信号Sr)がレーザ発光部10に与えられて、レーザ光源として炭酸ガスレーザ光源11が選択される。そして、図5に示すように、透明樹脂板Wbの上面の所定の領域に炭酸ガスレーザ光が照射される。尚、本実施形態では、所定の領域が、透明樹脂板Wbの表面の広さより狭い設定になっている。
第二工程では、図7、図8に示すように、粗面が形成された上面が当接面となるように他方側の透明樹脂板Waが重ね合わされる(図7の例では、図示上方より重ねあわされる)。
第三工程では、粗面領域Sにレーザ光を照射することで両樹脂板Wa、Wbが接合される。具体的に説明すると、まず、コントローラ30からの指令(切替信号Sr)がレーザ発光部10に与えられて、レーザ光源として半導体レーザ光源12が選択されるとともに、図示しない加圧手段により両樹脂板Wa、Wbが互いに密着するように圧力が加えられる。
本発明の実施形態2を図11によって説明する。
実施形態2は、実施形態1と同じく、第一工程では炭酸ガスレーザ光を用いて粗面領域Sを形成し、第三工程では、同部分に対して半導体レーザ光を照射して溶着する点は同じであるが、溶着部により識別情報を表示するようした点が異なる。
溶着部R≦粗面領域S≦透明樹脂部板の表面積
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれ、さらに、下記以外にも要旨を逸脱しない範囲内で種々変更して実施することができる。
11…炭酸ガスレーザ光源
12…半導体レーザ光源
20…ガルバノスキャナ
30…コントローラ
Wa…透明樹脂板
Wb…透明樹脂板
Claims (6)
- レーザ光により樹脂部材同士を溶着する樹脂溶着方法であって、
前記樹脂部材が共に可視光の波長域の光に対して透光性を有する透明樹脂であるものにおいて、
前記樹脂部材のうちの少なくともいずれか一方に、同樹脂部材に対し吸収性を有する波長の第一のレーザ光を照射して表面に粗面領域を形成する第一工程と、
前記粗面領域が形成された一方の樹脂部材と、他方の樹脂部材とを、前記粗面領域が形成された表面が当接面となるように重ね合わせる第二工程と、
互いに重ね合わされた樹脂部材同士の表面或いは、裏面側のいずれか一方から、前記当接面のうちの粗面領域が形成された部分に向けて、前記両樹脂部材に対して透過性を有する波長の第二のレーザ光を照射して両樹脂部材同士を熱溶着させる第三工程と、からなる樹脂溶着方法。 - 前記第一のレーザ光は、9μmから11μmの波長領域の中赤外レーザ光であり、
前記第二のレーザ光は、800nmから1100nmの波長領域の近赤外レーザ光であることを特徴とする請求項1記載の樹脂溶着方法。 - 前記第1のレーザ光は、炭酸ガスレーザであり、
前記第二のレーザ光は、半導体レーザであることを特徴とする請求項2に記載の樹脂溶着方法。 - 前記第一工程で、前記一方の樹脂部材の表面の一部に粗面領域を形成し、
前記第三工程で、前記第二のレーザ光を前記粗面領域にのみ照射して、両樹脂部材同士を熱溶着するようにしたことを特徴とする請求項1ないし請求項3のいずれかに記載の樹脂溶着方法。 - 前記第三工程において、
前記粗面領域のうち、前記熱溶着される部分の少なくとも一部に前記識別情報を含ませるよう前記第二のレーザ光を照射するようにしたことを特徴とする請求項1ないし請求項4のいずれかに記載の樹脂溶着方法。 - 請求項1ないし請求項5のいずれかに記載の樹脂溶着方法による溶着部を有する樹脂部品。
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JP2015202254A (ja) * | 2014-04-15 | 2015-11-16 | 山佐株式会社 | 遊技機用制御基板ケースおよび遊技機 |
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