The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Core Mixture

any of the mixtures of quartz sand, binders, and catalysts used in making cores and other shapes for molds, for example, pouring basins and filtering gauze. Other refractory fillers are sometimes used in place of the quartz sand. Highly refractory additives, such as chromite, chromite-magnesite, zircon, and graphite, are introduced into the mixtures. The mixtures, which may be moist, dry, or liquid, are hardened in core ovens and in coreboxes, which may or may not be heated.

REFERENCE

Stepanov, Iu. A., and V. I. Semenov. Formovochnye materialy. Moscow, 1969.

Mentioned in

References in periodicals archive

The core mixture with the blowing agent is injected from a second injection unit into the coinjection manifold.

Patents of interest

Most aluminum foundries can reduce and/or eliminate veining characteristics through formulation changes in the core mixture. However, brass and bronze foundries can benefit from the use of vein reduction compounds in core sand mixtures.

Reducing surface defects with proper vein reduction: while vein reduction compounds can lead to improvements in iron castings--such as reduction in metal penetration and core erosion--they can result in varying degrees of tensile property reduction

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