Anti-veining agent for metal casting

Details Anti-veining agent for metal casting Anti-veining agent for metal casting

2011-05-10

2011-05-10

Kerns, Kevin P (Department: 1735)

Metal founding

Process

Shaping a forming surface

C164S526000, C164S369000, C106S038200

Reexamination Certificate

active

07938169

ABSTRACT:
Additives to foundry sand cores are provided for reducing or eliminating surface defects called veins in metal castings, by reducing the propensity of sand mold and core aggregates to crack during metal casting. The additives generally include an iron oxide component such as magnetite and hematite and a glass component which is preferably free of lithium oxide. The additive may also optionally include an amount of carbon effective to reduce adhesion of sand particles to the casting.

REFERENCES:
patent: 2830913 (1958-04-01), Meyers et al.
patent: 5911269 (1999-06-01), Brander et al.
patent: 5962567 (1999-10-01), Geoffrey et al.
patent: 6972302 (2005-12-01), Baker et al.

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