Compressive molding machine for powder material
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United States of America Patent
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-
Dec 9, 2008
Grant Date -
Jul 6, 2006
app pub date -
Dec 29, 2005
filing date -
Jan 5, 2005
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An compressive molding machine for powder material comprises an upper punch dust-proof unit 6 that surrounds a sliding part 31 of an upper punch 3 and that has expandable elasticity, and an upper seal that is arranged at a lower end portion of an upper punch holding bore 12x holding the upper punch 3 on a rotary turret 1 and that holds the upper punch 3 slidably and air-tightly, and is further provided with a communicating means 81y that makes inside of the upper punch dust-proof unit 6 communicate with outside of the upper punch dust-proof unit 6 at a time when the upper punch dust-proof unit 6 makes an abutting contact with a portion near a circumference of the upper seal 7.
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