发明授权
- 专利标题： Molding methods using shape memory polymers
- 专利标题（中）： 使用形状记忆聚合物的成型方法
-
申请号： US12277015申请日： 2008-11-24
-
公开(公告)号： US07622069B1公开(公告)日： 2009-11-24
- 发明人: Hamid G. Kia , Ingrid A. Rousseau , Elisabeth J. Berger , John N. Owens
- 申请人： Hamid G. Kia , Ingrid A. Rousseau , Elisabeth J. Berger , John N. Owens
- 申请人地址： US MI Detroit
- 专利权人： GM Global Technology Operations, Inc.
- 当前专利权人： GM Global Technology Operations, Inc.
- 当前专利权人地址： US MI Detroit
- 代理机构： Dierker & Associates, P.C.
- 主分类号： B28B7/32
- IPC分类号： B28B7/32
摘要：
A molding method includes inserting a preform having a predetermined part shape into an external mold having the predetermined part shape. The preform has therein a perforated shape memory polymer mandrel in its temporary shape, and a bladder positioned within the perforated shape memory polymer mandrel. The shape memory polymer mandrel has i) the predetermined part shape as the temporary shape and ii) a shrunken shape as its permanent shape, wherein the shrunken shape is configured such that it is removable from the predetermined part shape. The method further includes configuring the bladder such that it substantially blocks perforations of the mandrel in its temporary shape, injecting resin into the external mold between an inner surface of the external mold and an outer surface of the preform such that the resin impregnates the preform, and curing the injected resin, thereby forming a molded part.