Process of manufacturing rotationally symmetrical articles
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United States of America Patent
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Aug 13, 2002
Grant Date -
N/A
app pub date -
Feb 10, 2000
filing date -
Feb 12, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a process of making a rotationally symmetrical article, such as rope pulleys, running wheels or the like, from plastic material such as cast polyamides, raw material melts of plastic material and predetermined amounts of catalysts, activators and stabilizers are prepared at different formulation and composition to impart the melts with different mechanical strengths after polymerization. The raw material melts are poured into a heated, rotating mold in succession in dependence on a polymerization pattern of the raw material melts. After complete polymerization of the melts, the mold is opened, and the finished article can be removed from the mold for optional refinishing procedure.
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