Details of the types of casting methods for large and medium-sized stainless steel castings

Unique casting processing process are centrifugal casting, low voltage casting, gas pressure casting, increased pressure casting, cooked plaster casting, porcelain casting and other methods

Working pressure casting

Working pressure to carry out casting is the processing of metal liquid introduced into the casting mold under the effect of other external forces (no force). Theoretical burden can casting technicality contains die-casting machine working pressure continuous casting and vacuum pump casting, low voltage casting, centrifugal casting, etc.; narrow sense of working pressure and its casting refers specifically to the die-casting machine metal type working pressure casting, commonly known as die-casting. These types of ways casting production process is the most important common in the non-ferrous plate metal raw material casting company, but also a relative sales market price level is the least.

Metal type casting

Metal casting is a contemporary process of processing hollow casting molds made of metal (fireproof carbon steel, ductile iron, heat-resistant cast iron, etc.).

Metal moulds can be action casting or working pressure casting. The mold casting of vacuum casting metal mold can be reused many times, and every time the metal liquid is poured, the casting can be obtained, with long service life and high efficiency of production and manufacturing. Metal mold castings not only have better dimensional precision and surface finish, but also have more compressive strength than sand mold castings in the case of pouring the same metal liquid. Therefore, in the mass production of non-ferrous plate metal, small and medium-sized and medium-sized castings, as long as the melting point of the casting raw material is not high, the general selection of the application of metal mold casting. Unbeknownst to us, there are some defects in the mold casting: because of the high temperature resistant carbon steel with the production and manufacture of the inner cavity processing process on it is expensive, so the mold cost fee of the mold is not expensive, unbeknownst to us, the cost fee is much smaller than the cost fee of the die casting mold. For small mass production, the mold cost fee assigned to each commodity is obviously too high and usually cannot be admitted. Since metal mold dies are limited by the size of the raw material and the storage capacity of the concave mold production equipment and casting machinery, they are inadequate for large castings. As a result, metal mold casting is rarely used for small-scale taxpayers and large-scale production. In addition, although the metal mold selection of high temperature resistant carbon steel, but the high temperature resistance is still relatively limited, metal mold is generally used to cast aluminum alloy profiles, zinc alloy materials, aluminum and magnesium alloys, less for casting alloy copper, more rarely for gray ferrous metal casting.

Die Casting

Die-casting is the most effective die-casting process, which is carried out in a die-casting machine for the metal type.

Die casting machine is divided into hot chamber die casting machine and cold chamber die casting machine. The hot chamber die-casting machine has a high level of intelligence, little damage to raw materials, and higher productivity than the cold chamber die-casting machine, but is limited by the temperature resistance of the equipment parts, and is only used for the production of zinc alloy materials, aluminum-magnesium alloy and other low melting point raw materials. At this stage the use of commonly used aluminum alloy profile die casting, because of its high melting point, only in the cold room die casting machine production and manufacturing. The main characteristic of die-casting is that the metal liquid is high pressure, fast add filling cavity, forming condensation under high pressure, the disadvantage of die-casting is: because the metal liquid is high pressure and fast, it is difficult to avoid encapsulating the gas in the cavity and producing subcutaneous tissue hole, thus the aluminum alloy profile die-casting can not be heat treatment process, zinc alloy material die-casting can not be surface spraying paint (instead of paint). Otherwise, when the above solution heating castings internal structure hole, the casting will appear deformation or bubbles. In addition, die-casting machinery and equipment laser cutting capacity should also be smaller, generally in 0.5mm up and down, which can not only ease the net weight of the casting, control the cost, but also be able to prevent through the surface of the high-density layer, exposure to subcutaneous tissue porosity, resulting in product workpiece damage.