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Casting modeling method is used to obtain accurate precision casting process general. It includes investment casting, ceramic mold casting, metal casting, pressure casting, lost foam casting. One of the more commonly used is the melting touch casting: selection of appropriate investment casting investment casting materials; repeated on the lost wax stick coating and sanding process, hardened shell and dry; then melt inside the mold to melt away, to get the cavity; calcined shell to obtain a sufficient strength, burn residual pattern materials,; casting metallic material needed; sand after shelling, to obtain high precision products. Depending on the product needs or for heat and cold.
Precision casting also called lost wax casting, its products sophisticated, complex, close to the final shape of the part, from time to processing or machining rarely used directly, so the casting is a near net shape forming of advanced technology.
Ancient China: The prince afternoon tripod, copper ban, bronze lion, etc., are casting a masterpiece. Since the 1940s, casting used in industrial production, the half-century has been developing at a faster rate. Especially in Europe and the United States has developed rapidly. Now casting for the aerospace, weapons departments, used in almost all industrial sectors, especially electronics, petroleum, chemicals, energy, transportation, light industry, textiles, pharmaceuticals, medical equipment, pumps and valves and other departments. In recent years, the rapid development of our country.
Lost wax investment casting technology not only makes the production of small castings, and can produce large castings, investment castings largest outline dimensions nearly 2m, while the minimum wall thickness is not to 2mm. Meanwhile castings has become more sophisticated, in addition to linear tolerances, the parts can achieve high geometric tolerances. The surface of castings casting angle value is also getting smaller and smaller, can achieve Ra0.4μm.
