Method of forming a plastic plate
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United States of America Patent
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Apr 28, 1992
Grant Date -
N/A
app pub date -
Apr 10, 1991
filing date -
Apr 17, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of forming a plastic plate includes melt extruding a thermoplastic resin containing a flake-like inorganic filler with an extruder into a former while a back pressure is applied to the extruded thermoplastic resin to thereby form it into a plate like body. The molten resin is extruded from at least one extruder into a channel or channels corresponding to the extruders which are formed in an adapter. The molten resin is fed to a cavity having at least one partition plate, formed in the former which is communicatively connected to the adapter so that a molten resin stream or streams introduced from the channel or channels are respectively divided and developed into at least two plate like bodies, and the plate-like bodies are merged in an overlapping state, followed by heat-bonding them.
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