Molding apparatus and method

Details Molding apparatus and method Molding apparatus and method

2006-05-12

2009-06-09

Lin, Kuang (Department: 1793)

Metal founding

Process

Shaping a forming surface

C164S322000, C164S374000

Reexamination Certificate

active

07543626

ABSTRACT:
This invention teaches an improved method and apparatus to make metal alloy castings, such as railroad car connector knuckles. One embodiment of the invention comprises a plurality of core mold assembly units contained within a single molding flask, wherein the mold units are filled with molten metal by way of a common runner and riser system. The said core mold assembly elements may be further comprised of a mold and core assembly formed of the same material, such as phenolic urethane impregnated sand, which is used to accurately replicate the desired shape of a final desired product. This invention eliminates the need to carefully gauge a plurality of part patterns within a single mold flask and reduces the potential for loss of parts, for example by cold shunting, by segregating each part to its own mold isolated mold unit. Such a method and apparatus allows a plurality of parts to be cast in a more accurate way, producing less scrap, improving part dimensional stability, and in some cases, reducing the number of cores needed.

REFERENCES:
patent: 6342543 (2002-01-01), Moy et al.
patent: 6923239 (2005-08-01), Cagle et al.

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