Foam Mould

Die casting mold parts correct use and maintenance methods:

1, try to reduce the mold of rapid cooling and heating, as far as possible continuous production, in the cold mold state, is strictly prohibited high-speed pressure shot.

Die casting process die casting die parts has been in hot and cold reciprocating fatigue state, mold cavity part of the temperature basically has been in 160 degrees -350 degrees back and forth change, mold cold and hot, non-stop hot and cold shrinkage, thus causing mold fatigue damage. And in the cold mold state began to produce, mold temperature by low temperature began to rise, the temperature difference increases, the mold expansion contraction increases, for the mold fatigue correspondingly increase, will accelerate the mold damage, shorten the mold life. Therefore, in the die-casting production should try to continuous production, minimize the rapid cold and heat of the mold, so as to extend the life of the mold.

In addition, in the cold mold state, the mold did not reach the temperature of normal production, mold gap is relatively large, in this case, is strictly prohibited to open the high-speed injection and pressurization. Otherwise, the gap parts of the mold, including the slider, the top bar hole and other parts of the easy to run into the aluminum skin, thereby damaging the mold, affecting the mold life.

2, as far as possible to reduce the injection speed, as far as possible to reduce the specific pressure, reduce the mold impact.

Die casting production, the injection speed of the high and low not only affects the filling speed of die casting, injection gate speed, at the same time the injection speed is high, the impact of the peak value will also increase. Therefore, the pressure injection speed is high, the pressure injection in the gate speed is fast, the mold will intensify the scouring, the impact peak increases, the mold will also increase the impact force, the mold life will be greatly reduced. Therefore, we are adjusting the die-casting process, in the case of ensuring product quality, try to reduce the pressure injection speed, for improving the mold life, improve the economic benefits of die-casting enterprises is very important. At present, the advanced die-casting machine is equipped with pressure injection brake device, for reducing the impact peak, reduce the impact force borne by the mold, improve the mold life is very beneficial.

Die casting process in the ejection ratio pressure is also an important parameter, ejection ratio pressure according to the casting quality requirements as well as the characteristics of the general in 400-900 kg / cm2. More than 900 kg/cm2, for the casting internal quality is generally not very useful. And compression injection ratio pressure is too high, not only to make the mold to withstand the increase in uplift force, and will even make the uplift force over the machine tool clamping force, resulting in aluminum flushing. At the same time, if the mold to withstand the up type force is big, the same will damage the mold or make the mold life shorten. Therefore, in the die casting production, we in addition to focus on injection speed, should pay more attention to the injection pressure, due to the injection pressure is not like the injection speed is easy to observe, often be ignored. In fact, the injection pressure is an important parameter in the die casting process, not only affect the casting quality, the mold life also has a huge impact. This point especially should cause die casting enterprise's attention.