Fixture for forming evaporative pattern (EPC) process patterns

Patent · Fri Jan 01 00:00:00 EST 1993

OSTI ID:869034

Turner, Paul C ^[1]; Jordan, Ronald R ^[1]; Hansen, Jeffrey S ^[2]

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1. Albany, OR
2. Corvallis, OR

A method of casting metal using evaporative pattern casting process patterns in combination with a fixture for creating and maintaining a desired configuration in flexible patterns. A pattern is constructed and gently bent to the curvature of a suitable fixture. String or thin wire, which burns off during casting, is used to tie the pattern to the fixture. The fixture with pattern is dipped in a commercially available refractory wash to prevent metal adherence and sticking to the fixture. When the refractory wash is dry, the fixture and pattern are placed in a flask, and sand is added and compacted by vibration. The pattern remains in position, restrained by the fixture. Metal that is poured directly into the pattern replaces the pattern exactly but does not contact or weld to the fixture due to the protective refractory layer. When solid, the casting is easily separated from the fixture. The fixture can be cleaned for reuse in conventional casting cleaning equipment.

• Research Organization: National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
• Assignee: United States of America as represented by Secretary of (Washington, DC)
• Patent Number(s): US 5265664
• OSTI ID: 869034
• Country of Publication: United States
• Language: English

Related Subjects

fixture
forming
evaporative
pattern
epc
process
patterns
method
casting
metal
combination
creating
maintaining
desired
configuration
flexible
constructed
gently
bent
curvature
suitable
string
wire
burns
tie
dipped
commercially
available
refractory
wash
prevent
adherence
sticking
dry
placed
flask
sand
added
compacted
vibration
remains
position
restrained
poured
directly
replaces
exactly
contact
weld
due
protective
layer
solid
easily
separated
cleaned
reuse
conventional
cleaning
equipment
refractory layer
commercially available
desired configuration
easily separated
casting process
protective refractory
casting metal
evaporative pattern
process patterns
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