Method for hot pressing irregularly shaped refractory articles

Details Method for hot pressing irregularly shaped refractory articles Method for hot pressing irregularly shaped refractory articles

1979-06-14

1982-02-09

Parrish, John A.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

264332, B29C 306

Patent

active

043149618

ABSTRACT:
The present invention is directed to a method for hot pressing irregularly haped refractory articles with these articles of varying thickness being provided with high uniform density and dimensional accuracy. Two partially pressed compacts of the refractory material are placed in a die cavity between displaceable die punches having compact-contacting surfaces of the desired article configuration. A floating, rotatable block is disposed between the compacts. The displacement of the die punches towards one another causes the block to rotate about an axis normal to the direction of movement of the die punches to uniformly distribute the pressure loading upon the compacts for maintaining substantially equal volume displacement of the powder material during the hot pressing operation.

REFERENCES:
patent: 1918064 (1930-09-01), Taylor
patent: 2342772 (1944-02-01), Wellmon
patent: 3201235 (1965-08-01), Mueller
patent: 3732056 (1973-05-01), Eddy et al.

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