Casting sand for casting sand mold and preparing method of casting sand

Abstract

The invention discloses casting sand for casting a sand mold and a preparing method of the casting sand and relates to the technical field of sand mold casting. The casting sand is prepared from, by weight part, 100-120 parts of silica sand, 15-20 parts of ceramic micro powder, 10-15 parts of volcanic ash, 10-15 parts of carclazyte, 8-12 parts of vermiculite powder, 8-12 parts of paraffin oil, 6-10 parts of alginic acid trimethylene glycol ester, 5-8 parts of asbestos powder, 5-8 parts of hydroxy propyl cellulose, 4-6 parts of xanthan gum, 3-5 parts of a silane coupling agent, 3-5 parts of graphite powder, 2-3 parts of nanometer zirconia, 1-2 parts of nanometer zinc powder and 50-60 parts of ethyl alcohol. The casting sand has good refractoriness, thermal stability, fluidity, breathability and liquid metal permeability resistance, molding of the sand mold and the mold core is facilitated, in addition, collapsibility is good after the casting sand is used, repeated use can be achieved, the casting cost is reduced, and therefore economic benefits are improved.

Description

Technical field: [0001] The invention relates to the technical field of sand casting, in particular to a casting sand for sand casting and a preparation method thereof. Background technique: [0002] Sand casting is a casting method that produces castings in sand molds. Steel, iron and most non-ferrous alloy castings can be obtained by sand casting. Because the molding materials used in sand casting are cheap and easy to obtain, the casting mold is easy to manufacture, and it can adapt to the single-piece production, batch production and mass production of castings. It has been the basic process in casting production for a long time. The basic raw materials for making sand molds are foundry sand and sand binder. The most commonly used foundry sand is siliceous sand. When the high-temperature performance of silica sand cannot meet the requirements of use, special sand such as zircon sand, chromite sand, and corundum sand are used. But relatively speaking, the price of spec...

AI Technical Summary

Problems solved by technology

But relatively speaking, the price of special sand is relatively high, and its formability is weaker than that of silica sand. Therefore, the company expects to increase the refractoriness of silica sand with other additives on the premise of reducing costs.