Method for making plastic overcaps using hot runner back-gated mold technology
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United States of America Patent
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N/A
Issued Date -
Jul 7, 2005
app pub date -
Mar 1, 2005
filing date -
Jul 12, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention is a method for making a plastic overcap using a mold tool stack. The mold tool stack has a core and a cavity plate forming a cavity therebetween. The core has a resin passageway therein with a gate in a top surface of the core. The gate has a valve proximate the top surface of the core to regulate resin flowing from the resin passageway and into the cavity. The steps of the mold method are as follows: the mold tool stack is closed to form the cavity; the valve is opened to allow resin to enter the cavity; the valve is closed; the resin is allowed to cool; and the mold tool stack is opened to allow removal of the plastic overcap from within the mold tool stack. The top side of the plastic overcap produced is blemish-free, facilitating placement of labels and other markings thereon.
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