Mold releasable pattern material for use in investment casting
AssigneeSignicast Corporation
InventorJon Bjork
Life of this patent
Estimating the term…
Abstract
A composition for use in investment casting includes a pattern material. The pattern material has internal mold releasability. The composition is suitable for use in investment casting. The pattern material may include a wax, a resin, a filler, and/or a fluorochemical. The pattern material may be capable of being injected numerous consecutive times without requiring the application of an external mold release agent (such as spraying silicone release agent) to a die used in the investment casting process. The pattern material would preferably have sufficient mold releasability to not adhere to the die, but sufficient adhesion to adhere to a shell-forming material, such as a ceramic slurry.
Claims45
A wax-based pattern material for use in investment casting, comprising:
- a wax;
- and
- a fluorochemical;
- wherein the pattern material is suitable for use in investment casting.
A wax-based pattern material for use in investment casting, comprising:
- about 15 wt. % to about 50 wt. % wax;
- about 10 wt. % to about 60 wt. % resins;
- and
- a fluorochemical, fluorochemicals comprising less than about 5 wt. %.
A composition for use in investment casting, comprising:
- a pattern material, the pattern material comprising internal mold releasability;
- and
- wherein the composition is suitable for use in investment casting.
A method of investment casting, comprising:
- forming a pattern using a pattern material, the pattern material comprising internal mold releasability;
- forming a shell using the pattern;
- removing the pattern material from the shell;
- and
- casting a product using the shell.
A method of investment casting, comprising:
- forming a pattern using a pattern material, forming a pattern using a pattern material not comprising applying an external mold release agent to a die used to form the pattern more than once every 100 shots;
- forming a shell using the pattern;
- removing the pattern material from the shell;
- and
- casting a product using the shell.
A method of investment casting, comprising:
- forming a pattern using a pattern material,
- forming a shell using the pattern;
- removing the pattern material from the shell;
- and
- casting a product using the shell;
- wherein substantially no flow or open knit lines are formed in the pattern.
Dependencies are inferred from the claim text.