how important the temperature control is to the mould life
As shown in the figure above, the thermal strength of the material decreases with the increase of temperature, and even drops sharply when it reaches the critical value. In production, the temperature rise mainly comes from the flow rate of die casting liquid and the heat energy converted from filling kinetic energy. Therefore, too high temperature of material liquid and too fast filling speed will cause the thermal strength of the cavity surface to decrease, thus speeding up the erosion, mucous membrane, cracking of materials and other conditions that make the mould failure. Therefore, on the premise of ensuring the quality of die-casting products, it is an effective method to prolong the service life of mould to adopt relatively low-temperature material liquid and slow filling as far as possible.
In addition to tempering through heat treatment will completely or maximally reduce the stress generation, the resistance during production can also be reduced by filling and draining the gating system. Therefore, the design of gating system is also a temperature control technology, not to mention heat treatment. This shows how important the temperature control is to the mould life!
