Mold assembly for manufacturing heavy duty plastic hollow board
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United States of America Patent
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-
Nov 25, 2008
Grant Date -
Dec 13, 2007
app pub date -
Jun 13, 2006
filing date -
Jun 13, 2006
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A heavy duty plastic hollow board and a mold assembly for manufacturing the same, wherein the plastic board is made through an integrated molding process and the exterior thereof is integrally closed to contain an inward space with a plurality of strengthening ribs; wherein the mold assembly for manufacturing said board comprises a first mold, a second mold, cavities respectively arranged on the opposite surfaces of both molds, a movable mold arranged associated to the outer surface of the second mold which is movable for a predetermined distance from the second mold; a plurality of rib-forming members of the movable mold to be received by a plurality matching through holes of the second mold. As the movable mold approaches and is combined with the second mold, the rib-forming members thread through the through holes and appear in the cavity of the second mold. Thereagainst, while the movable mold leaves the second mold, the rib-forming members completely depart from said cavity.
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