Plastic and nonmetallic article shaping or treating: processes – Direct application of electrical or wave energy to work – Limited to treatment of surface or coated surface
Patent
1997-08-11
1998-12-29
Kuhns, Allan R.
Plastic and nonmetallic article shaping or treating: processes
Direct application of electrical or wave energy to work
Limited to treatment of surface or coated surface
264 464, 264 465, 264 468, 264 82, 264 83, 264101, 264405, B29C 4406, B29C 4412, B29C 4414
Patent
active
058536493
ABSTRACT:
A method of manufacturing a panel having a foam interlayer. A flexible cover is placed adjacent a first mold in an open tool. A rigid substrate is placed adjacent a second mold, or alternately, is place atop the flexible cover in the first mold, of the opened tool. The first and/or second molds are electrically isolated from one another and from the associated manufacturing equipment. A vacuum draws the cover against the first mold and retains the cover in position during the manufacturing operation. The tool is moved to a closed position and the cover is positioned juxtaposed the substrate. The cover and substrate are positioned a distance apart thus creating a space therebetween. A vacuum is created in the space and a radio frequency (RF) electric field is applied between the first and second molds. The RF electric field causes a plasma to be created within the space. The plasma activates both the cover and the substrate. While the space is still under vacuum, a foaming material is injected into the space. The foaming material is drawn into the space by the vacuum and adheres to the activated cover and substrate. The RF electric field is subsequently coupled in the space to dielectrically cure the foam material.
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Tisack Michael Derek
Winowiecki Kenneth Andrew
Ford Global Technologies Inc.
Kuhns Allan R.
Porcari Damian
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