公开(公告)号：WO1994011172A1

公开(公告)日：1994-05-26

申请号：PCT/US1993010193

申请日：1993-10-26

Applicant: DAVIDSON TEXTRON INC.

Inventor： DAVIDSON TEXTRON INC. ,  CHADWICK, Neil

IPC: B29C39/02

CPC classification number: B60R21/2165 ,  B29C37/0057 ,  B29C39/021 ,  B29L2031/3038 ,  Y10S264/60

Abstract: A method for forming a hidden tear seam (14) in the cover (12) for a safety air bag assembly includes the steps of filling a heated open mold with liquid plastisol or dry powder composed of polyvinyl materials; forming a gel layer of polyvinyl chloride material on an open heated thin metal mold; dumping excess polyvinyl chloride plastisol material from the gel layer; fusing the gel layer; stamping a tear seam (14) in a fused layer while it is still plastic by providing an anvil having a surface thereon of a first predetermined area and including an embossment thereon extending outwardly of the first predetermined area and stamping the tear seam (14) by directing the embossment into the fused layer until the surface engages the fused layer and wherein the first predetermined area is sized to produce a reaction force on the anvil to determine the depth of penetration of the embossment and thereafter finally curing and cooling the fused layer and removing the layer from the thin metal mold.

Abstract translation: 一种用于在安全气囊组件的盖子（12）中形成隐藏的撕裂缝（14）的方法包括以下步骤：用由聚乙烯材料组成的液体增塑溶胶或干粉填充加热的开模; 在开放加热的薄金属模具上形成聚氯乙烯材料的凝胶层; 从凝胶层倾倒过量的聚氯乙烯增塑溶胶材料; 熔化凝胶层; 通过提供具有第一预定区域的表面的砧座，并且包括在其上延伸到第一预定区域外部的压花，并且将撕裂接缝（14）由 将压花引导到熔融层中直到表面接合熔融层，并且其中第一预定区域的尺寸设定成在砧座上产生反作用力以确定压花的穿透深度，然后最后固化和冷却熔融层并除去 该层从薄金属模具。