Method for making a plastic spring
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United States of America Patent
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-
Mar 1, 1988
Grant Date -
N/A
app pub date -
Sep 28, 1982
filing date -
Sep 28, 1982
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Method and apparatus are disclosed for making multi-turned plastic springs. At least 2 mold sections forming a central opening and a cavity with many turns are placed around a hollow sleeve having sufficient opening to flow molten plastic to individual turns. After the plastic solidifies the sleeve is moved with respect to the mold sections to shear a spring that has formed in the cavity from a plastic core in the sleeve. The mold sections are then opened and the spring is removed.
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