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Title: Fixture for forming evaporative pattern (EPC) process patterns

Abstract

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.

Inventors:
 [1];  [1];  [2]
  1. (Albany, OR)
  2. (Corvallis, OR)
Issue Date:
Research Org.:
National Energy Technology Laboratory, Pittsburgh, PA, and Morgantown, WV
OSTI Identifier:
869034
Patent Number(s):
5265664
Assignee:
United States of America as represented by Secretary of (Washington, DC) NETL
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
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; /164/

Citation Formats

Turner, Paul C., Jordan, Ronald R., and Hansen, Jeffrey S. Fixture for forming evaporative pattern (EPC) process patterns. United States: N. p., 1993. Web.
Turner, Paul C., Jordan, Ronald R., & Hansen, Jeffrey S. Fixture for forming evaporative pattern (EPC) process patterns. United States.
Turner, Paul C., Jordan, Ronald R., and Hansen, Jeffrey S. Fri . "Fixture for forming evaporative pattern (EPC) process patterns". United States. https://www.osti.gov/servlets/purl/869034.
@article{osti_869034,
title = {Fixture for forming evaporative pattern (EPC) process patterns},
author = {Turner, Paul C. and Jordan, Ronald R. and Hansen, Jeffrey S.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {1}
}

Patent:

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