Method for producing a core sand and/or mold sand for...

Details Method for producing a core sand and/or mold sand for... Method for producing a core sand and/or mold sand for...

2008-06-10

2011-10-04

Gupta, Yogendra (Department: 1744)

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

Utilizing diverse solid particles

C106S038280, C106S038270, C366S141000

Reexamination Certificate

active

08029711

ABSTRACT:
A method for producing a core sand and/or mold sand for foundry purposes mixes a granular mineral mold base material with an additive and an inorganic binder. An inorganic swelling additive having a swelling index of at least 9, in other words a higher swelling index that that achieved for coal, is used as an additive. Alternatively, it is also possible to work with an inorganic additive, for example with macro-crystalline graphite, whereby the finished mixture of the mold base material, the additive, and the binder is compacted to a density increase of at least 20 g/dm3.

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