Gravity cast aluminum

发布日期:2020-03-09 16:16:57

Gravity casting aluminum refers to the process of injecting molten metal into the mold under the action of the earth's gravity, also known as gravity casting. Gravity casting in the broad sense includes sand casting, metal casting, investment casting, EPC, slurry casting, etc.; gravity casting in the narrow sense mainly refers to metal casting. The processing methods of making metal materials into products include casting, forging, extrusion, rolling, drawing, stamping, cutting, powder metallurgy, etc. Among them, casting is the most basic, commonly used and widely used process.



2. The molten metal is injected into the hollow mould made of high temperature resistant material, and the product of the required shape is obtained after condensation. This is a casting. The product is a casting. Castings can be divided into ferrous metal castings (including cast iron, cast steel) and non-ferrous metal castings (including aluminum alloy, copper alloy, zinc alloy, magnesium alloy, etc.) according to the casting materials. Nonferrous metal precision casting factory is a nonferrous metal casting enterprise focusing on aluminum alloy and zinc alloy. Casting can be divided into sand casting and metal casting. The precision casting factory is good at these two kinds of casting processes, and designs and manufactures these two kinds of casting molds by itself. According to the pouring process of liquid metal, castings can also be divided into gravity casting and pressure casting. Gravity casting aluminum refers to the process of injecting molten metal into the mold under the action of the earth's gravity, also known as casting. In the broad sense, gravity casting includes sand casting, metal casting, investment casting, EPC, slurry casting, etc.; in the narrow sense, gravity casting refers to metal casting. Pressure casting is the process of injecting liquid metal into the mold under the action of other external forces (excluding gravity). The broad sense of pressure casting includes pressure casting, vacuum casting, low pressure casting, centrifugal casting, etc.; the narrow sense of pressure casting refers to the metal mold pressure casting of pressure casting machine, which is called die casting for short. Precision casting factory has been engaged in gravity casting of sand mold and metal mold for a long time. These casting processes are the most commonly used and the lowest relative price processes in the current non-ferrous metal casting.



3. Sand casting is a traditional casting process with sand as the main molding material. Generally, gravity casting is used for sand mold, and low pressure casting, centrifugal casting and other processes can be used when there are special requirements. Sand casting has a wide range of adaptability, small, large, simple, complex, single, quality can be used. The mold for sand casting is usually made of wood, commonly known as wood mold. In order to change the defects of wood mold, such as easy to deform and damage, Xudong precision casting plant changed all of them into aluminum alloy mold or resin mold. Except for single sand mold, it has high dimensional accuracy and long service life.


Although the price has increased, it is still much cheaper than the metal mold. In small batch and large batch production, the price advantage is particularly prominent. In addition, the refractoriness of sand mold is higher than that of metal mold, so the materials with higher melting point, such as copper alloy and ferrous metal, also adopt this process. However, there are some disadvantages of sand casting: because each sand casting can only be poured once, the mold is damaged after the casting is obtained, and must be reshaped, the production efficiency of sand casting is low; and because the overall nature of sand casting is soft and porous, the size accuracy of sand casting is low, and the surface is very rough. However, after years of technology accumulation, the surface condition of sand casting has been greatly improved, and the effect of shot peening is equivalent to that of metal casting.

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