Automotive injection mould from China manufacturer introduces the precautions for the heating process of injection mould
Release time:
2021-11-11 17:45
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Do you know what are the precautions for the heating process of injection molds? Follow the editor of Automotive injection mould from China manufacturer to have a simple understanding!
1. Casting process. This is an important link in the manufacturing process of working parts for injection molds. For injection molds of high-alloy tool steels, technical requirements are usually required for the metallographic structure such as material carbide dispersion. In addition, the casting temperature scale should be strictly controlled, the correct heating standard should be drawn up, the correct casting force method should be selected, and the slow cooling or timely annealing after forging should be performed.
2. Prepare for heat treatment. Depending on the materials and requirements of the working parts of the injection mold, annealing, normalizing or quenching and tempering should be used to prepare heat treatment processes to improve the organization, remove the structural shortcomings of the casting blank, and improve the processing technology. High-carbon alloy die steel can remove the network secondary cementite or chain carbides through appropriate preparation heat treatment, so that the carbides can be spheroidized and refined, and the uniformity of carbide distribution can be accelerated. This will help ensure the quality of quenching and tempering and improve the life of the mold.
3. Quenching and tempering. This is the key link in mold heat treatment. If overheating occurs during quenching and heating, it will not only cause greater brittleness of the workpiece, but also easily cause deformation and cracking when it becomes cold, which will seriously affect the life of the mold. Special attention should be paid to prevent oxidation and decarburization when the die is quenched and heated, and the heat treatment process standard should be strictly controlled. When conditions permit, vacuum heat treatment can be selected. After quenching, it should be tempered in time, and different tempering processes should be selected according to the skill requirements.
4. Stress relief annealing. After the parts of the injection mold are processed, the stress relief annealing treatment should be carried out. The purpose is to relieve the internal stress formed by rough machining, so as to avoid excessive deformation and cracks caused by quenching. For molds with high precision requirements, stress relief and tempering treatment are required after grinding or electrical machining, which is conducive to stabilizing the precision of the mold and improving the service life. Heat treatment is a process that every injection mold needs to experience before leaving the factory, but not every injection mold factory can implement it in a standard manner. It also needs to pay attention to process skills. The mold factory has set a new standard for mold heating for the industry, making Each set of molds produced has reached a fine height.
The above is an introduction by the editor of Automotive injection mould from China manufacturer: a brief introduction to the precautions for the heating process of injection moulds.
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