Method of making a plastic encased tool component having a lightweight hollow core
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United States of America Patent
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Nov 16, 1993
Grant Date -
N/A
app pub date -
Aug 6, 1992
filing date -
Aug 6, 1992
priority date (Note) -
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Abstract
An improved method is provided for the manufacture of tool components and the like, of a type having a hollow core disposed within an outer encasement of molded plastic material. A hollow core for the tool component is filled with a flowable filler material such as small steel pellets prior to placement of the core into a mold cavity for injection mold formation of the outer encasement. During the molding step, the filler material provides a substantially rigid structural backstop which enables a core of lightweight construction to withstand typical injection molding parameters. The thus-formed tool component is removed from the mold, and some or all of the filler material is drained from the core through an open port. In one embodiment the tool component includes a lightweight hollow tool handle; in another embodiment, the tool component includes the head of a deadblow hammer with a portion of the filler material retained therein.
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