Lost wax process utilizing a high temperature wax-based material
AssigneeAluminum Company of America
InventorsCalvin Bates, Linda Gaydosik
Life of this patent
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Abstract
The present invention is a wax-based material for use in the lost wax process where the wax must be capable of withstanding temperatures of up to 350.degree. F., the wax-based material including: (a) a high temperature brittle wax; (b) about 5-30 wt % organic plasticizer including polyfunctional amines and alcohol amines and (c) about 5-10 wt % paraffin wax.
Claims12
A method for making a hollow composite structure that will maintain its integrity at temperatures of up to about 1000.degree. F., the method comprising the steps of:
- (a) forming a wax-based mandrel capable of withstanding temperatures of up to 350.degree. F. without melting made from a wax-based material consisting essentially of
- (i) a high temperature brittle wax;
- (ii) about 5-10 wt % plasticizer selected from the group consisting of polyfunctional amines and alcohol amines and
- (iii) about 5-10 wt % paraffin wax;
- (b) covering said mandrel with a fiber-reinforcing material;
- (c) impregnating said fiber-reinforcing material with curable binder;
- (d) curing said binder;
- and
- (e) melting said mandrel with heat to thereby form said hollow composite structure.
A method for making a hollow composite structure that will maintain its integrity at temperature of up to about 1000.degree. F., the method comprising the steps of:
- (a) forming a wax-based mandrel capable of withstanding temperatures of up to 350.degree. F. without melting made form a wax-based material comprising:
- (i) a high temperature brittle wax;
- (ii) bout 5-10 wt % plasticizer selected from the group consisting of polyfunctional amines and alcohol amines;
- and `(iii) about 5-10 wt % paraffin wax;
- (b) applying a coating of thermosetting resin containing fibers of ceramic materials on said mandrel;
- (c) curing said thermosetting resin;
- and
- (d) melting said mandrel with heat to thereby form said hollow composite structure.
A lost wax method for making a randome that does not require a facing so that it can be used at temperatures in excess of 500.degree. F., the method comprising the steps of:
- (a) forming a wax-based mandrel capable of withstanding temperatures of up to 350.degree. F. without melting made from a wax-based material comprising:
- (i) a high temperature brittle wax;
- (ii) about 5-10 wt % plasticizer selected from the group consisting of polyfunctional amines and alcohol amines;
- and
- (iii) about 5-10 wt % paraffin wax;
- (b) coating said mandrel with a thermoplastic resin containing a fiber-reinforcing material;
- (c) curing said thermoplastic material;
- and
- (d) melting said mandrel with heat to thereby form said randome composite structure.
Dependencies are inferred from the claim text.