Method of manufacturing a foam-molded product
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United States of America Patent
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-
May 17, 2005
Grant Date -
Oct 10, 2002
app pub date -
Mar 5, 2002
filing date -
Apr 9, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An improved method of manufacturing a foam-molded product is provided including the steps of: filling a resin containing a foaming agent into a mold cavity by injection within a time period from a time point just before completion of mold clamping to a time point after the completion of mold clamping; allowing the resin thus filled in the mold cavity to form a skin layer over a surface thereof; thereafter retracting a movable mold to define a predetermined cavity clearance between the movable mold and a stationary mold, so as to cause the foaming agent contained in an uncured portion of the resin to foam; and cooling the resin filled in the cavity mold to form a foam-molded product having a surface forming a tight skin layer and an inside portion in a foamed state.
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