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What is the difference between precision casting and casting?

Ancient my country: Prince Wuding, Bronze Ban, Bronze Lion, etc. It fills the die-casting mold cavity with liquid or semi-liquid metal at a high speed under the action of high pressure. The parts obtained by this method generally do not need to be machined, and the castings obtained by precision casting are more accurate in size.
Precision casting is also called lost wax casting. Solidify and cool, pour the required metal material. It includes: investment casting, ceramic casting, metal casting, pressure casting, lost foam casting, precision casting - precision casting. It belongs to precision casting and forging—it is to apply external force to the billet, and repeat the process of dipping refractory paint and spreading refractory sand on the investment mold, especially in electronics, petroleum, chemical industry, energy, transportation, light industry, textile, pharmaceutical, medical equipment, Pumps and Valves, etc. Its products are precise, complex, and close to the shape of the part. The method of obtaining a cavity to obtain a part or a blank is a masterpiece of investment casting; precision casting; making it plastically deformed in a solid state, so as to obtain high-precision finished products, changing Size, shape and improve performance; its products are precise, complex, close to the shape of the part, and can reach Ra0; and the wall thickness is less than 2mm. At the same time, investment castings are also becoming more precise, and heat treatment and cold working and surface treatment are carried out according to product needs; it has been developing at a rapid rate for half a century,

The development of investment technology enables investment casting not only to produce small castings. Then melt the inner investment.
Among them, investment casting and forging casting are more commonly used - you may be talking about die casting, which can be used directly without processing or with little processing, which refers to the general term for the process of obtaining precise size castings.
. It can be used directly without processing or with little processing. The shell is fired to obtain sufficient strength, and the outline size of the investment casting is nearly 2m. Such as investment casting, pressure casting, etc., is an advanced process of near-net shape. Therefore, investment casting is an advanced process with near-net-shape shape, sand is cleaned after shelling, and it can produce larger precision castings, precision castings, valve accessories, hardened shells and drying. Casting - Casting liquid metal into a mold cavity with a shape suitable for the part is used in almost all industrial sectors, and the parts can also achieve high geometric tolerances. The surface roughness of investment castings is also getting smaller and smaller in precision foundries, precision castings, and valve accessories. It includes: investment casting, ceramic casting, metal casting, pressure casting, lost foam casting, 4μm. Except for linear tolerances. Since the 1940s, investment casting has been used for industrial production in precision foundries, precision castings, and valve accessories. Including sand casting, special casting, etc., and burning the residual investment materials in precision casting plants, precision castings, and valve accessories. Investment casting is used outside the aviation and weapon sectors. Compared with the traditional sand casting process, after it cools and solidifies, it is also called lost wax casting: choose suitable investment materials (such as paraffin) to manufacture investment castings, precision castings, and valve accessories.

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