US 9,809,014 B2
Resin joined body and method for manufacturing same
Wataru Kawagishi, Nagoya (JP); Yusuke Fuji, Iwakura (JP); Takashi Koda, Nagoya (JP); and Yoshihiko Kohmura, Nagoya (JP)
Assigned to NGK SPARK PLUG CO., LTD., Aichi (JP)
Appl. No. 14/238,412
Filed by NGK SPARK PLUG CO., LTD., Nagoya-shi, Aichi (JP)
PCT Filed Sep. 27, 2012, PCT No. PCT/JP2012/074864
§ 371(c)(1), (2) Date Feb. 11, 2014,
PCT Pub. No. WO2013/047645, PCT Pub. Date Apr. 4, 2013.
Claims priority of application No. 2011-215561 (JP), filed on Sep. 29, 2011.
Prior Publication US 2014/0255668 A1, Sep. 11, 2014
Int. Cl. B32B 37/00 (2006.01); B29C 65/16 (2006.01); B29C 65/82 (2006.01); B29C 65/00 (2006.01); B32B 7/04 (2006.01); B29C 65/78 (2006.01)
CPC B32B 37/0076 (2013.01) [B29C 65/1635 (2013.01); B29C 65/1654 (2013.01); B29C 65/1658 (2013.01); B29C 65/7817 (2013.01); B29C 65/8253 (2013.01); B29C 66/112 (2013.01); B29C 66/131 (2013.01); B29C 66/24244 (2013.01); B29C 66/3472 (2013.01); B29C 66/53461 (2013.01); B29C 66/721 (2013.01); B29C 66/733 (2013.01); B29C 66/73161 (2013.01); B29C 66/73921 (2013.01); B29C 66/836 (2013.01); B32B 7/045 (2013.01); B29C 65/1677 (2013.01); B29C 65/1696 (2013.01); B29C 66/71 (2013.01); B29C 66/7212 (2013.01); B29C 66/7332 (2013.01); B29C 66/7336 (2013.01); B29C 66/73115 (2013.01); B29C 66/872 (2013.01); Y10T 428/24851 (2015.01)] 7 Claims
OG exemplary drawing
 
1. 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.