Thermoplastic core and method of using
AssigneeBauer Hammar International, Inc.
InventorJeong M. Lee
Life of this patent
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Abstract
Thermoplastic cores reinforced with strong magnetic shots or/and particles are molded and then thermosets are molded around this thermoplastic core. The thermoplastic core is decored by a magnet at a high temperature above the softening point of thermoplastic matrix to produce a hollow curved internal space.
Claims13
A method of molding an internally hollow plastic article using a thermoplastic core, said method comprising the steps of:
- molding a thermoplastic core to produce a hollow internal space in a plastic molded part, sand core consisting essentially of a thermoplastic matrix phase and reinforcing magnetic agents, overmolding a plastic around said core, and decoring said thermoplastic core by a magnet at temperatures higher than the softening point of said thermoplastic core.
A thermoplastic core capable of producing a hollow internal space in a plastic body which is molded around said core, said core being capable of being melted out or decored at temperatures which do not damage said body.
A fusible thermoplastic core for use with lost core plastic molding technology, said core consisting essentially of a thermoplastic matrix phase and reinforcing magnetic shots of spherical shape, said core being overmolded with a thermoset or a thermoplastic, and said core is capable of being decored by a magnet at temperatures higher than the softening point of said thermoplastic core.
Dependencies are inferred from the claim text.