Pressure casting, referred to as die casting, is a casting method in which molten alloy liquid is poured into the pressure chamber, the cavity of the steel mold is filled at high speed, and the alloy liquid is solidified under pressure to form a casting.

Die casting mold is the model of casting metal parts. The commonly used materials for die casting are aluminum alloy, zinc alloy and magnesium alloy, and aluminum alloy is widely used.

A die casting die is a die that molds molten metal under high pressure. Due to the abrasive and high temperature molten metal direct contact, the working conditions are very bad, it repeatedly contact with hot metal, its heat degree is higher than hot forging die, casting die surface will produce thermal fatigue turtle crack.

Generally speaking, the requirements for die casting die steel are as follows:
1. Die casting die steel at high temperature should have high strength and certain toughness, enough hardness and wear resistance;
2. It has excellent heat resistance and fatigue to avoid early cracking of the mold;
3. It should have good thermal conductivity, corrosion resistance and oxidation resistance.

1. The mold should be rigid enough that it will not deform under the clamping force of the die casting machine.

2. The mold should not be too heavy to facilitate loading, unloading, repair and handling, and reduce the load of the die casting machine.

3. The pressure center of the die hole should be as close as possible to the center of die closing force of the die casting machine to prevent uneven force of the die casting machine, the mold lock is not dense, and the casting produces burrs.

4. The shape of the mold should take into account the coordination with the specifications of the die casting machine:
(a) The length of the die should not interfere with the tie rod.
(b) The total thickness of the mold should not be too thick or too thin, beyond the clamping range of the die casting machine.
(c) Pay attention to the coordination with the feed pipe (cold chamber machine) or nozzle (hot chamber machine).
(d) When using the pull-back lever to draw back the top and exit mechanism, pay attention to the size and position swearback of the pull-back lever.

5. In order to facilitate the handling and assembly of the mold, screw holes should be drilled above and on both sides of the fixed mold and movable mold so that the ring head bolts can be screwed into.

6. The mold cold material well design is reasonable and sufficient.