aluminium alloy cold chamber die casting machine

In die casting, the die is filled under the pressure of 15 ~ 120MPa. Pressure always works during solidification. Pressure is generated in the casting machine and applied to the melt through the piston, and the piston slurry molten metal is injected into the mold. By this method, castings with wall thickness less than 1mm and sharp edges can be produced. Higher casting pressure leads to higher metal flow viscosity (10 ~ 150m / a) and shorter filling time (150 ~ 20ms). This also means that when gradually in contact with the die surface, although the cooling speed is very fast, it will not solidify until the die is fully filled. For this reason, the best mold filling is very important. The high pressure acting on the die surface will also produce pressure to separate the two half dies, which is opposite to the corresponding "locking force". These forces put a great load on the die. Unlike in re cold casting, hot working steel, small box and solid die with stable clamping frame need to be used. The hydraulic unit associated with the machine is equipped with a high-pressure reservoir, and the control of the machine requires extensive automation. All this doubles the cost of machinery and tools. The high dimensional accuracy and surface properties of production, together with high output, make this process more economical, especially for long-term processes. These are also the reasons why and die casting are more widely used in aluminum alloys than other casting processes. The load of all die parts increases the pressure of the casting, so the sand core can not exceed a specific temperature (higher than that in low-pressure die casting). The metal core must be pulled out to allow the casting to be taken out of the mold. It cannot be used as a groove in practice, which also limits the design of die castings. However, in many cases, appropriate methods can be found to make up for this defect.

die casting machine: Automated production.