| 摘要 |
<p>PURPOSE:To realize homogeneous and satisfactory welding with accompanying neither strain at overlapped parts nor deformation of rigid sheet by a method wherein the overlapped parts are welded by pressure together by blowing hot air in a tin gap, which is formed in the overlapped parts. CONSTITUTION:In order to weld thermoplastic rigid sheet 1 and 2 together, firstly, the inserting part 11' of a thin claw 11 is inserted at the lap 3 of the thermoplastic rigid sheets 1 and 2. By inserting in the lap 3, thin gap 20 is formed and held in the neighborhood 21 of the tin claw 11. Next, high temperature hot air 22 is instantaneously blown from a nozzle 12 in the gap 20 laterally. In this case, the tip opening of the nozzle 12 is arranged so as to face to the edge face 6 of the thermoplastic rigid sheet 1. Further, the lap 3, in the gap 20 at which hot air 22 is blown, is welded by pressure with a following pressure roller 14 so as to complete the welding of the lap 3.</p> |
