METHOD OF MOULDING AND A CORE PLUG FOR USE IN THE METHOD
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United States of America Patent
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Issued Date -
Oct 22, 2015
app pub date -
Apr 16, 2015
filing date -
Apr 17, 2014
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Abstract
A method of moulding a component having a closed shape and defining an internal void having a predetermined size and shape is disclosed, together with a core plug for use in the method. The method comprises the steps of: (a) cutting a piece of open cell foam material to substantially match said predetermined size and shape of the internal void of a component to be moulded; (b) applying a flexible sealant to an outer surface of said cut piece of resilient open cell foam to form a closed core; (c) placing said closed core in the mould to support a component during moulding and curing; (d) generating a vacuum within the closed core to collapse it within the void after the moulded component has cured, and (e) removing the collapsed core from the molded component through an opening in said moulded component.
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