| 摘要 |
PURPOSE:To carry out the welding by one kind of tool horn irrespective of a pat shape of a joining end part of the molded products to be molded. CONSTITUTION:In a joining method wherein joining end parts of both molded products 1, 2 which are obtained by allowing one side joining end part 4 to insert or screw on to the other side joining part 3 of the molded products 1, 2 molded respectively of a thermoplastic material into a hollow cylindrical state are welded through an ultrasonic wave, the molded products 1, 2 are positioned on a main body table A of an ultrasonic device right under an ultrasonic oscillator C installed movablly freely vertically on the upper part of the main body table A and held by setting and positioning in a crossing state to its vertical movement direction. Then the ultrasonic oscillation is transmitted to a space between the joining end parts 3, 4 of both molded products 1, 2 through a tool horn D fitted to the lower end of the ultrasonic oscillator C. With that constitution frictional heat is made to generate on one position of a circumferential direction between the joining end parts 3, 4 positioning in a crossing state to the ultrasonic oscillator C, the part is welded and the joining end parts 3, 4 of both molded products 1, 2 can be joined to each other. |
