Resin joined body and method for manufacturing same
AssigneeNgk Spark Plug Co., Ltd.
InventorsWataru Kawagishi, Yusuke Fuji, Takashi Koda, Yoshihiko Kohmura
Life of this patent
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Abstract
A method for producing a resin joined body in which a specific region L1 of a welding portion of a second resin member (21) is provided to form a low-laser-light-transmissible portion, and the low-laser-light-transmissible portion has a laser light transmissibility lower than that of a region of the welding portion other than the specific region L1. Welding is carried out so that a portion between points S2 and F2, serving as a weld overlap portion (112), is present in the specific region L1 forming the low-laser-light-transmissible portion. Also disclosed is a resin joined body.
Claims7
A method for producing a resin joined body, the method comprising bringing a first resin member having laser light absorbability into contact with a second resin member having laser light transmissibility;
- and irradiating the second resin member with laser light, so as to carry out a cycle of welding along a line to form a welded portion of a resin joined body;
- and
- wherein an end point of the cycle of welding lies beyond the start point of the cycle of welding, wherein the welded portion has a weld overlap portion, wherein the weld overlap portion is formed by welding occurring twice along the weld line between the start point of the cycle of welding and the end point of the cycle of welding, the method for producing the resin joined body characterized in that:
- prior to irradiating the second resin member with laser light, so as to carry out the cycle of welding, a specific region of the welding portion of the second resin member is formed as a low-laser-light-transmissible portion, the low-laser-light-transmissible portion having laser light transmissibility lower than that of a region of the welding portion other than the specific region;
- and
- the first resin member and the second resin member are welded together so that the weld overlap portion overlaps at least a portion of the specific region forming the low-laser-light-transmissible portion.
A resin joined body produced by bringing a first resin member having laser light absorbability into contact with a second resin member having laser light transmissibility, and irradiating the second resin member with laser light, so as to carry out a cycle of welding along a line to form a welded portion of a resin joined body,
- wherein an end point of the cycle of welding lies beyond the start point of the cycle of welding, wherein the welded portion has a weld overlap portion, wherein the weld overlap portion is formed by welding occurring twice along the weld line between the start point of the cycle of welding and the end point of the cycle of welding, the resin joined body characterized in that:
- prior to irradiating the second resin member with laser light, so as to carry out the cycle of welding, a specific region of a welding portion of the second resin member is formed as a low-laser-light-transmissible portion, the low-laser-light-transmissible portion having laser light transmissibility lower than that of a region of the welding portion other than the specific region;
- and the weld overlap portion is present in the specific region forming the low-laser-light-transmissible portion.
Dependencies are inferred from the claim text.