Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1991-11-20
1993-10-26
Lin, Kuang Y.
Metal founding
Process
Shaping liquid metal against a forming surface
164 98, 164529, B22D 1914, B22D 1902
Patent
active
052557294
ABSTRACT:
The present invention is a process for forming net shape parts by matching mold and component CTE and having the mold heated near the liquidus such that the mold and the component go through the same thermal and dimensional changes during cool down of the component. The present invention also pertains to a method of producing the matched CTE mold. The method includes the step of providing the first material in porous form. Next, there is the step of melting the second material. Then, there is the step of infiltrating the first porous material with the second melted material in proportion such that their combined CTE essentially matches that of the composite component. The composite mold and composite component can be formed at the same time. In an alternative method for forming the mold having a specific CTE, there is the step of providing the first material and the second material. Next, there is the step of mixing the materials together in proportion such that the combined CTE essentially matches that of the component. Then, there is the step of pressing the materials together such that the mold is formed into the proper shape and has sufficient structure to form the component. The invention is also a system for casting. The system includes a mold having a specific CTE, means for containing a material. The component is comprised of heating means to melt the material and means to introduce the melted material into the mold.
REFERENCES:
patent: 4573519 (1986-03-01), Donomoto et al.
Lin Kuang Y.
Schwartz Ansel M.
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