There are several main ways of mold heat transfer:

Thermal radiation is one of three ways of heat transfer. All objects with a temperature higher than absolute zero can produce thermal radiation, and thermal radiation emits energy in the form of electrical radiation. The higher the temperature, the greater the total energy radiated. At the same time, the larger the surface area of ​​the object, the greater the amount of radiation. Die-casting molds will lose part of the heat energy through thermal radiation at high temperatures.

The transfer of heat from one part of a system to another, or from one system to another, is called heat conduction. Heat conduction is the main method of heat transfer in solids. Heat is transferred from the high-temperature part of the object to the low-temperature part. As long as there is a temperature difference in the object, heat transfer will definitely occur. Heat conduction is the most important heat transfer method for die-casting molds.

In a liquid or gas, the hotter part rises and the cooler part falls, circulating and mixing with each other, making the temperature tend to be uniform. Convection is an important way of heat transfer in gas, which can be divided into natural convection and forced convection.

The heat of the mold is transferred to the ambient air, and the surrounding hot air takes away a small amount of heat by convection. The moisture in the release agent is suddenly vaporized by heat, and the heat is taken away through natural convection, and the fluid in the cooling channel is taken away by forced convection. mold heat.

In the production of die casting, the heat sources of the mold are the heat generated by the molten metal and the die-casting machine itself, but the main source is the molten metal. Each time the molten metal is injected, the heat is transferred to the surface of the mold through heat conduction, and the surface of the mold heats up rapidly, and then the heat is transferred to the inside of the mold, and then the heat is transferred out through the water transport of the mold and the spraying of the mold release agent on the surface of the mold.