Invention Application
- Patent Title: PREFORMS AND METHODS OF MAKING THE SAME
- Patent Title (中): 其制备方法及其制备方法
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Application No.: US12276983Application Date: 2008-11-24
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Publication No.: US20100127427A1Publication Date: 2010-05-27
- Inventor: Hamid G. Kia , Ingrid A. Rousseau , Elisabeth J. Berger , John N. Owens
- Applicant: Hamid G. Kia , Ingrid A. Rousseau , Elisabeth J. Berger , John N. Owens
- Applicant Address: US MI Detroit
- Assignee: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
- Current Assignee: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
- Current Assignee Address: US MI Detroit
- Main IPC: B28B7/32
- IPC: B28B7/32 ; B28B21/50
Abstract:
A method for making a preform includes creating a pressure differential between an inside and an outside of a perforated shape memory polymer mandrel in its temporary shape. The pressure differential is such that pressure outside the perforated shape memory polymer mandrel is greater than pressure inside the perforated shape memory polymer mandrel. The perforated shape memory polymer mandrel has i) a predetermined preform 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 preform shape. The method further includes depositing, as the pressure differential is maintained, at least one material onto a surface of the perforated shape memory polymer mandrel. The at least one material is set in the predetermined preform shape, thereby forming the preform.
Public/Granted literature
- US07910038B2 Preforms and methods of making the same Public/Granted day:2011-03-22
Information query
