Process for moulding plastic articles
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United States of America Patent
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Mar 4, 2014
Grant Date -
Apr 7, 2011
app pub date -
Jun 9, 2009
filing date -
Jun 9, 2008
priority date (Note) -
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Abstract
A process for forming plastic articles is described which uses a machine (10) having a pair of hingedly-connected female molds (12, 14), which can be heated and cooled and which can be clamped together. The process involves placing a plastic particulate material in each mold (12, 14) when they are in an open position and heating the molds (12, 14) to form a plastic skin (58, 60) lining each mold (12, 14). An expandable filler material (62) is then placed in one mold and the two molds clamped closed to form a completely closed cavity. The plastic skins in the two molds bond together to form a continuous plastic shell (66) completely encasing the filler material (62).
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