Molding process for forming complex shapes
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United States of America Patent
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Dec 11, 2001
Issued Date -
N/A
app pub date -
Jul 17, 1998
filing date -
Nov 27, 1996
priority date (Note) -
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status (Latency Note)
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Abstract
A plastic part having a complex structure as a first layer and a simple structure as a second layer, is formed using a method for molding. Initially, a single mold is provided, the mold having an interior cavity and a runner reaching from an exterior of the mold to the cavity. The mold is kept closed while a quantity of a first plastic material is injected via the runner into the interior cavity to form a first layer of the plastic part. The mold is then partially opened, creating an increased interior cavity section, into which a quantity of a second plastic material is injected, via the runner, to form a second layer of the plastic part. The solidified plastic part can then be ejected from the mold.
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