| 摘要 |
PROBLEM TO BE SOLVED: To obtain a welding device to shorten a welding time and to improve weld strength and the designability of a weld shape and a welding method using the device. SOLUTION: In a welding method and a welding device. The welding base 61 of a thermoplastic resin molded product is made to penetrate a fixing hole 71 formed in an object 70 to be fixed, a protruded variable part is melted to form an expanded part 64 so that the object 70 is welded to the molded product. A hollow guide hole 62a with its ceiling opened in the axial direction is formed in advance in the central part of the welding boss 61, a projection part 12 formed at the center of the contact surface of a heating element 10 is inserted into the guide hole 62a, while the welding boss 61 is being surrounded with a peripheral wall 13 installed to enclose the surroundings at a prescribed distance from the projection part 12, the heating element 10 is made to emit heat, the welding boss 61 is heat-melted, a space part 14 is filled with a resin, are is ejected from a pipe into the heating element 10 for cooling, the expanded part 64 is solidified, and the object 70 is fixed to a plastic plate 60. |
