| 摘要 |
<p>PURPOSE:To prevent the panel pad from leaking and to decrease the quantity required for it by a method wherein the pad is composed of a panel provided with a thin part, an opening at the step part of the panel and a surface skin cemented to the panel at the said thin part. CONSTITUTION:A closed-loop groove 9 is provided on a common surface 7 of the panel 1 made from synthetic resin, flame treatment is given to the thin part 6 of the groove 9 and part of the surface skin 3 covering the pad 2 is welded to the said groove 9 under pressure. The pad 2 is injected, foamed and cured between the panel 1 and the surface skin 3. The panel 1 and the surface skin 3 are cut off along the inner side 9a of the groove 9 to form an opening portion 10. Thus, the pad 2 can be completely prevented from leaking by the thin portion 6 and the surface skin 3. Therefore, a small quantity of the pad 2 can answer the purpose and the pad cost can be reduced. If the opening 10 is cut off by a press work, its dimensional accuracy can be secured.</p> |
