Compression molding apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jun 2, 1992
Grant Date -
N/A
app pub date -
Jul 9, 1991
filing date -
Dec 7, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A compression molding apparatus equipped with a rotary support member on which are mounted a plurality of molds. The molds are successively conveyed passing through a plastic material feed zone, a compression molding zone and a discharge zone by the rotation of said rotary support member. A plastic material feed device is disposed in said plastic material feed zone to feed a softened and molten plastic material to each of the molds. The plastic material feed device includes an extruder, an extruding block in which a plastic material flow path is formed, and a plastic material flow control device disposed between the extruder and the extruding block. The plastic material flow control device includes a main body that has an inlet path communicating with the extruder, a feed path communicating with the extruding block, and a discard path. The main body includes a control valve which is selectively located at a feed position at which the inlet path is shut off from the discard path and is communicated with the feed path, and at a discard position at which the inlet path is shut off from the feed path and is communicated with the discard path.
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