PROBLEM TO BE SOLVED: To provide a laser welded structure and a laser welding method of a resin member which can easily join a light transmitting resin member to a light absorbing resin member without causing an erosion mark and the like.SOLUTION: A laser welded structure of a resin member has a thermoplastic light transmitting resin member 1 having properties of transmitting a laser beam X and a thermoplastic light absorbing resin member 2 which has properties of absorbing the laser beam X, and shows compatibility with the light transmitting resin member 1. A high transmittance resin portion 3 having higher transmittance of the laser beam X than the transmittance of the laser beam X of the light transmitting resin member 1 is embedded in a recess portion 11 for welding formed so as to be recessed from a surface 102 in the light transmitting resin member 1. The light transmitting resin member 1 and the light absorbing resin member 2 are joined to each other by welding a boundary portion K of a sandwiched portion 12 of the light transmitting resin member 1 and the light absorbing resin member 2.SELECTED DRAWING: Figure 2
【課題】光透過樹脂部材と光吸収樹脂部材との接合を、溶損跡等を発生させることなく、容易に行うことができる、樹脂部材のレーザー溶着構造及びレーザー溶着方法を提供すること。【解決手段】樹脂部材のレーザー溶着構造は、レーザー光Xを透過する性質を有する熱可塑性の光透過樹脂部材1と、レーザー光Xを吸収する性質を有するとともに、光透過樹脂部材1との相溶性を示す熱可塑性の光吸収樹脂部材2とを備えている。光透過樹脂部材1における表面102から陥没して形成された溶着用凹部11には、光透過樹脂部材1のレーザー光Xの透過率よりもレーザー光Xの透過率が高い高透過率樹脂部分3が埋設されている。光透過樹脂部材1と光吸収樹脂部材2とは、光透過樹脂部材1の挟持部12と光吸収樹脂部材2との境界部Kが溶着されていることによって接合されている。【選択図】図2
LASER WELDED STRUCTURE AND LASER WELDING METHOD OF RESIN MEMBER
樹脂部材のレーザー溶着構造及びレーザー溶着方法
2016-08-18
Patent
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