| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a paper-made container with flanges it which in the mutual adhesion of side plate joining pieces and the mutual adhesion of flange joining pieces, burning which occurs in conventional heat seal is prevented, and the adhesion can be performed promptly and surely. SOLUTION: In the method for manufacturing the paper-made container 1 with the flanges 13 and 14, in the mutual adhesion of triangular side plate joining pieces 17 and the mutual adhesion of flange joining pieces 15 and 16, by making patches 19 vibrated by an ultrasonic vibrator contact the pieces 17 to be fitted to side plates 6 and the pieces 15 and 16 to be fitted to each other, the thermoplastic resin of a sheet material is heated by the ultrasonic vibration energy of the patches 19, so that the pieces 17 are welded to the side plates 6, and the pieces 15 and 16 are welded to each other. |
