公开(公告)号：US4064206A

公开(公告)日：1977-12-20

申请号：US653053

申请日：1976-01-28

Applicant: Gerhard Seufert

Inventor： Gerhard Seufert

IPC: B29C45/00 ,  B29C35/12 ,  B29C37/00 ,  B29C53/00 ,  B29C53/04 ,  B29C53/06 ,  B29C53/84 ,  B31B50/25 ,  B65B61/02 ,  B65D5/42 ,  B29C15/00

CPC classification number: B65D5/4266 ,  B29C53/06 ,  B31B1/00 ,  B31F1/08 ,  B29C35/12 ,  B29C37/0057 ,  B31B2201/252 ,  B65D2301/20

Abstract: An edge forming tool is pressed into a thermoplastic sheet which is supported on an anvil or counter tool. The edge forming tool is maintained at a temperature below the melting temperature of the thermoplastic sheet and a high frequency electric field is established between the edge forming tool and the counter tool. The high frequency electric field softens the thermoplastic sheet which is deformed by the edge forming tool, Thereafter, the softened and deformed portions of the thermoplastic sheet are allowed to cool and re-harden before the sheet is folded to form a bend therein.

Abstract translation: 边缘成形工具被压入支撑在砧座或对置工具上的热塑性片材中。 边缘成形工具保持在低于热塑性片的熔融温度的温度下，并且在边缘形成工具和对置工具之间建立高频电场。 高频电场软化由边缘成形工具变形的热塑性片材。此后，使热塑性片材的软化和变形部分在片材被折叠之前冷却并重新硬化以在其中形成弯曲。