Static molds – Including electric heating means
Patent
1991-03-28
1993-01-05
Woo, Jay H.
Static molds
Including electric heating means
249111, 2491141, 249116, 249134, 249135, 249112, 4251748R, 425547, B28B 742
Patent
active
051768399
ABSTRACT:
A multilayered insulated mold structure is provided. An insulation layer provided on each of the mold cores retains heat at the molding surface, thereby increasing surface quality of the finished part. The insulating layer has a varying density across its thickness so as to have a low density center region and high density surface regions. By having a relatively low denisty, the center region of the insulating layer has a low thermal conductivity. Thus, the insulating layer may be made from the same material as the core and still have an acceptable insulating value. The use of the same material for adjacent layers reduces the potential of delamination of the layers. The multilayered mold is compatible with passive or active heating of the molding surface.
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Davis Robert B.
General Electric Company
Scanlon Patrick R.
Webb II Paul R.
Woo Jay H.
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