Method of manufacturing a foamed protective and decorative molding for an automobile
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United States of America Patent
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-
Jul 10, 1984
Grant Date -
N/A
app pub date -
Sep 28, 1982
filing date -
Jan 22, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of manufacturing a protective and decorative molding for an automobile, comprising the steps of: adding a foaming agent to a starting resinous material comprising a vinyl chloride polymer or copolymer or a blend thereof; kneading the foaming agent and the starting resinous material; successively forming the kneaded mixture into an elongated rod or sheet blank by means of extruder or calender rolls; shearing the rod or blank into pieces having a predetermined shape; and molding the piece in a mold having high-frequency heating electrodes to apply a high-frequency voltage to the piece so that the foaming agent contained in the piece decomposes and foams to provide a product having a predetermined shape.
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