Compressive molding machine for powder material

Details Compressive molding machine for powder material Compressive molding machine for powder material

2005-12-29

2008-12-09

Gupta, Yogendra (Department: 1791)

Plastic article or earthenware shaping or treating: apparatus

With means lubricating cooperating apparatus parts

C425S215000, C425S345000

Reexamination Certificate

active

07462023

ABSTRACT:
An compressive molding machine for powder material comprises an upper punch dust-proof unit6that surrounds a sliding part31of an upper punch3and that has expandable elasticity, and an upper seal that is arranged at a lower end portion of an upper punch holding bore12xholding the upper punch3on a rotary turret1and that holds the upper punch3slidably and air-tightly, and is further provided with a communicating means81ythat makes inside of the upper punch dust-proof unit6communicate with outside of the upper punch dust-proof unit6at a time when the upper punch dust-proof unit6makes an abutting contact with a portion near a circumference of the upper seal7.

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