Method for hot pressing irregularly shaped refractory articles

Patent · Fri Jan 01 00:00:00 EST 1982

OSTI ID:864129

Steinkamp, William E ^[1]; Ballard, Ambrose H ^[2]

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1. Clinton, TN
2. Knoxville, TN

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.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: W-7405-ENG-26
• Assignee: United States of America as represented by Department of Energy (Washington, DC)
• Patent Number(s): US 4314961
• OSTI ID: 864129
• Country of Publication: United States
• Language: English

Related Subjects

method
hot
pressing
irregularly
shaped
refractory
articles
directed
haped
varying
thickness
provided
uniform
density
dimensional
accuracy
partially
pressed
compacts
material
placed
die
cavity
displaceable
punches
compact-contacting
surfaces
desired
article
configuration
floating
rotatable
block
disposed
displacement
towards
causes
rotate
axis
normal
direction
movement
uniformly
distribute
pressure
loading
maintaining
substantially
equal
volume
powder
operation
uniformly distribute
irregularly shaped
uniform density
refractory material
hot pressing
substantially equal
powder material
contacting surfaces
pressure loading
hot press
refractory articles
contacting surface
dimensional accuracy
desired article
die cavity
varying thickness
shaped refractory
pressing irregularly
/264/