Common cooling methods for die casting dies
For the service life of the die-casting die, it is also important to do the cooling work in time when the die-casting die temperature is high. The cooling methods of die casting die include water cooling, air cooling, heat pipe cooling and indirect cooling.
(1) Water cooling: a cooling water channel is set on the die-casting die to make the circulating water flow into the forming insert or core and bring the heat out of the die. Water cooling has high cooling efficiency, which can effectively reduce the temperature of the cavity surface, but increases the complexity of the die-casting die structure. It is mainly used for dies requiring large heat dissipation. In order to prevent condensation on the surface of the cavity, the temperature of the cooling water should be higher than the room temperature.
(2) Air cooling: air cooling can be used for parts of the die-casting mold that are difficult to be cooled with water. Air cooling can be carried out by blower or compressed air. Air cooling can not only cool the die-casting mold, but also blow the coating evenly, disperse the volatile gas of the coating and reduce the porosity of the casting. The cooling temperature of air cooling is much lower than that of water cooling.
(3) Heat pipe cooling: mainly used for small parts that are difficult to be directly cooled with cooling water. In the small parts to be cooled, the special heat of the heat pipe is used to export, and then the cooling water is used to cool the heat pipe.
(4) Indirect cooling: Alloy with high heat transfer coefficient (ammonium bronze, tungsten base alloy, etc.) can be used for indirect cooling at the hot spot of the die casting mold of the mold temperature machine. The ammonium bronze pin is screwed into the fixed core, and the end of the copper pin is equipped with a heat sink to enhance the cooling effect.
