Sand Castings In China

Sand casting process uses sand shell and sand core as the molding material

, the liquid metal filling in gravity to produce the casting mold casting method. Steel, iron, and most non-ferrous alloy castings are available in sand casting methods. As used in sand casting molding material is cheap, easy to mold manufacturing, casting a single piece on the production, mass production and mass production can meet for a long time, has been casting the basic process.

Casting process is generally divided into three basic parts, mold preparation, casting metal casting the final preparation and processing. Preparation is to mold the liquid into a solid cast metal container, the mold according to the materials used can be divided into ceramic, metal type, sand, clay and so on. According to the number used can be divided into semi-permanent and permanent-type and one-off type. The quality of the mold to prepare the final casting only directly affect the quality of the main factors. Melting and casting metal casting, casting metal (cast alloy) main cast steel, cast iron and cast non-ferrous alloys. Casting surface treatment including the removal of foreign body, casting processing and testing, relief grinding burrs and other projections as well as Phi seam heat treatment, plastic surgery, anti-rust treatment and rough so.

Manufacture of basic raw material is sand casting sand and sand binder. The most commonly used casting sand is silica sand. Silica sand can not meet the requirements of high temperature performance when used zircon sand, chromite sand, sand and other special corundum sand. To make the sand mold and core made of a certain intensity, in the handling, combined type and pouring liquid metal without deformation or damage when, generally by adding sand in the foundry binder, loose sand will bond together to form the sand. Sand casting used in the sand by the sand outside the binder used in different ways and build strength into the wet clay, sand, clay, sand and dry sand three kinds of chemical hardening.

by: galen

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