Apparatus for making a pressed body

Details Apparatus for making a pressed body Apparatus for making a pressed body

1983-02-28

1985-10-08

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Press forming apparatus having opposed press members

Male shaping member and female mold

264 3C, 425812, B28B 1700

Patent

active

045457557

ABSTRACT:
An apparatus for pressing a fluent powder into a rigid body comprises a die formed with an upwardly open and laterally closed pressing cavity adapted to hold a mass of the fluent particles to be pressed and a punch having a lower portion substantially complementary to and fittable in the pressing cavity and having a lower face engageable with the mass in the cavity. This punch is formed with a throughgoing vent passage having a lower end opening at the lower face and an upper end opening thereabove to the surroundings. An actuator can displace the punch relative to the die between an upper position clear thereof and a lower position engaged in the cavity and compressing the mass therein and through an intermediate position between the upper and lower positions. A valve body in the passage permits free gas flow therethrough when the punch is in and between the intermediate and upper positions and blocks flow therethrough between the intermediate and lower positions.

REFERENCES:
patent: 1826945 (1931-10-01), McKay et al.
patent: 2607435 (1952-08-01), Dohse
patent: 2865052 (1958-12-01), Wilcox
patent: 3377662 (1968-04-01), Fukushima
patent: 3822857 (1974-07-01), Tanie

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