Low-pressure Casting

We have gravity die casting,low-pressure casting and sand casting process,can produce all kinds of aluminum castings about 1200 yearly.


Low-pressure Casting


Production capacity

The company has a variety of production and manufacturing processes such as aluminum alloy material research and development testing, low-pressure (metal mold/sand mold) manufacturing, metal mold (sand mold) gravity manufacturing, and high-pressure (sub-high pressure) manufacturing. It has large-scale machining centers and various CNC machine tools imported from Britain, the United States and other countries, and has strong finished product processing capabilities. The company's products involve high-speed rail, locomotive traction system, locomotive braking system, locomotive damping system, fluid control, ship water supply and drainage valve products, high-voltage power industry, coal mining machinery, new energy, robots and other fields, and are exported to Europe and the United States, etc. nation.

Product process

In the process of low pressure casting, according to the type of castings and castings, the way of pressurization is also different, for example:

1. Low pressure charging. Only low-pressure filling is used, no crystallization pressurization is used (the mold is high, there are risers, and the casting is not closed). Sand low pressure casting is the most widely used, and this process can be used for some medium and large castings.

2. Stable crystallization. After the molten metal fills the cavity, the pressure is stabilized, and the casting is crystallized and solidified under this pressure until it is completely solidified. Generally suitable for casting of alloy green sand mold and metal mold thin-walled and complex castings

3. Slowly pressurize and crystallize. After filling, the pressure is first stabilized, so that the surface of the casting is first solidified into a hard shell, and then the pressure is increased for crystallization and solidification. It is generally suitable for low-pressure sand casting, and thick-walled castings are usually poured. Due to the limitation of the strength of the casting mold, the crystallization pressure cannot be rapidly increased, so as to ensure that the castings can be crusted under constant pressure.

4. Rapid supercharging crystallization. After the molten metal fills the cavity, the pressure is rapidly increased to allow the casting to solidify at a higher crystallization pressure, which is basically similar to the slow pressurized crystallization process, except that there is no stable crusting process after filling. It is generally suitable for low pressure casting of metal molds, and it is suitable for castings with fast heat dissipation and cooling.

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