Technical points of cold chamber die casting process:

1. Alloy smelting and treatment

The smelting quality of the alloy directly affects the mechanical properties and surface quality of the casting. During the alloy smelting process, the temperature must be strictly controlled, and refining, degassing and slag treatment must be carried out to reduce the generation of impurities and pores.

2. Injection speed and pressure

The injection speed and pressure of the cold chamber die casting machine are important parameters that determine the quality of the casting. A higher injection speed can quickly fill the mold cavity with molten metal, reducing cold shut and pore defects. The injection pressure determines the density of the molten metal in the mold cavity and the surface finish of the casting.

3. Mold temperature control

The mold temperature has an important influence on the quality of the casting. Too high or too low a temperature will cause surface defects of the casting. Cold chamber die casting machines are usually equipped with a mold temperature control system, which accurately controls the mold temperature through a heating or cooling system to ensure that the mold operates within a suitable operating temperature range.

4. Exhaust and overflow design

During the die-casting process, the high-speed injection of molten metal into the cavity will entrain air. If the air is not discharged, pores will be formed. Reasonable design of exhaust channels and overflow grooves is a key link in the design of die-casting molds to ensure that the castings are dense and pore-free.

5. Lubrication and cooling

Lubrication and cooling of the mold are also crucial steps in the cold chamber die-casting process. Proper lubrication can reduce mold wear, extend mold life, and help the castings to be demolded smoothly. The cooling system helps to stabilize the production rhythm and maintain the dimensional accuracy of the castings.

6. Control and optimization of process parameters

The process parameters of cold chamber die-casting, such as injection speed, injection pressure, mold temperature, pouring temperature, etc., need to be optimized and adjusted according to the requirements of specific castings and alloy materials. Reasonable matching and precise control of process parameters are crucial to improving the quality of castings.

7. Post-processing of castings

Castings after cold chamber die-casting usually need to undergo subsequent processes such as deburring, heat treatment, and surface treatment to ensure that the dimensional accuracy, mechanical properties, and appearance quality of the castings meet the design requirements