Thermoplastic mold for rotational molding
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United States of America Patent
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Mar 10, 1992
Issued Date -
N/A
app pub date -
Nov 23, 1990
filing date -
Jun 24, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A plastic mold (A, B) for rotational molding are disclosed. The plastic mold, used in lieu of a conventional metal mold, is constructed from a fiber (52) reinforced thermoset plastic resin (50) having a heat distortion point above the melt point of the thermoplastic polymeric material from which an article is molded. Metal (64, 70, 74) or other dissimilar material may be used to provide different coefficients of heat transfer at preselected portions of mold (A, B). The entire mold may include a thermal coefficient modifier to increase the heat transfer rate of the mold uniformly over the entire mold in addition to the preselected portions.
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