| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a resin molded article having high adhesiveness and excellent appearance, and including a welding part having high joining strength using a laser beam. <P>SOLUTION: The method for manufacturing the resin molded article includes (a) a step wherein the welding region of a light-absorbing resin member 21 and the welding region 27 corresponding to a light-transmitting resin member 22 are press-contacted and disposed facing each other, (b) a step which sets a plurality of welding lines along the extending direction of the welding region 27, makes a laser beam 12s incident from the light-transmitting resin member 22, repetitively radiates the laser beam 12s with respect to the plurality of welding lines, and heats and melts a whole of the light-welding region 27 simultaneously, and (c) a step which melts and welds the light-transmitting resin member 22 and the light-absorbing resin member 21 which are press-contacted and disposed facing each other. Temperature gradient is formed from one end side in the width direction to the other end side in such a state that the whole of the welding region 27 is melted in the step (b). <P>COPYRIGHT: (C)2011,JPO&INPIT |
