Because metal copper, zinc, aluminum and aluminum alloy have good fluidity and plasticity, and the casting process is carried out in a pressure die casting machine, aluminum die castings can be made into various complicated shapes and have high precision and smoothness, thus greatly reducing the machining amount of castings and the casting allowance of metal copper, zinc, aluminum or aluminum alloy, not only saving power and metal materials, but also greatly saving labor costs; Copper, zinc, aluminum and aluminum alloys have excellent thermal conductivity, small specific gravity and high machinability; Therefore, die casting is widely used in automobile manufacturing, internal combustion engine production, motorcycle manufacturing, motor manufacturing, oil pump manufacturing, transmission machinery manufacturing, precision instruments, landscaping, electric power construction, architectural decoration and other industries.

the traditional die casting process mainly consists of four steps, or high pressure die casting. These four steps include mold preparation, filling, injection and sand dropping, which are also the basis of various improved die casting processes. In the preparation process, it is necessary to spray lubricant into the mold cavity, which can not only help to control the temperature of the mold, but also help to demould the casting. Then the mold can be closed and molten metal can be injected into the mold with high pressure, which is about 1 to 175 MPa. When the molten metal is filled, the pressure will be maintained until the casting solidifies. Then the push rod will push out all the castings. Because there may be multiple cavities in a mold, multiple castings may be produced in each casting process. In the doffing process, it is necessary to separate the residue, including the mold opening, runner, gate and flash. This process is usually completed by extruding the casting through a special trimming die. Other doffing methods include sawing and grinding. If the gate is fragile, you can directly smash the casting, which can save manpower. The excess mold opening can be reused after melting. The usual output is about 67%.

high-pressure injection leads to a very fast filling speed of the mold, so that molten metal can fill the whole mold before any part solidifies. In this way, surface discontinuities can be avoided even for thin-walled parts that are difficult to fill. However, this will also lead to air retention, because it is difficult for air to escape when filling the mold quickly. This problem can be reduced by placing an exhaust port on the parting line, but even a very precise process will leave a blowhole in the center of the casting. Most die casting can complete some structures that cannot be completed by casting, such as drilling and polishing.