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Die Casting Mould Industry Plays An Important Role

Jie Mei Precision Mould Ltd | Updated: Aug 08, 2017

Die Casting Mould is a rapid development of modern metal pressure processing technology, a high efficiency, less cutting metal forming precision casting method, it has been widely used in all walks of life in the national economy, in addition to cars and motorcycles, Industrial appliances, but also widely used in household appliances, agricultural machinery, radio, communications, machine tools, transportation, shipbuilding, cameras, watches, computers, textile equipment and other industries. Mold material as the main object of bearing mold design, heat treatment and manufacturing. It plays an important role in the mold industry, the difficulty of mold manufacturing process, mold heat treatment process is appropriate, mold life can play a leading role in long-term role.

The main reason for failure of die - casting mold

① fatigue is due to die-casting process die repeatedly subjected to chilling, heat caused by thermal stress, resulting in the gradual production of cracks. Its morphology is mostly mesh, also known as cracks, there are radial. These microcracks in the shallow surface of the mold are generally repairable. If the thermal fatigue crack penetrates the inside of the substrate, the mold will cause the die size to be overbought, or the thermal fatigue crack will expand into macroscopic cracks due to mechanical stress or thermal shock during the Die Casting Mould process.

② severe brittle cracking die-casting mold brittle cracking is the first to form a large macro-cracks, and soon extended to lead to brittle cracking and failure. Caused by a lot of reasons, such as die-casting operation caused by improper mechanical overload, thermal shock, poor processing quality, weakening the mold carrying capacity, mold design unreasonable stress concentration, etc., and mold material toughness is brittle cracking internal The

③ erosion (corrosion) die-casting process, through the pressure of molten metal into the die-casting mold cavity. In some cases, there is a reaction between the molten metal and the mold, resulting in the dissolution of the mold material, which is a combination of erosion and corrosion. The main influencing factors are: casting alloy temperature and composition, mold design and surface treatment.

④ collapse collapse refers to the process of casting die in the fall of the mold or its sub-surface collapse. This is due to the fact that the thermal strength of the mold material is too low. The higher the Die Casting Mould temperature, the greater the likelihood of collapse.

Die Casting Mould Mold Material Performance Requirements

The service life of the die-casting mold is closely related to the material of the die-casting mold. Die-casting mold parts are mainly divided into contact with the metal parts, sliding parts and mold parts. Die Casting Mould mold cavity and sprues and other components in the metal pressure casting production process, directly with the high temperature, high pressure, high-speed metal liquid contact. On the one hand by the direct erosion of metal liquid, wear, high temperature oxidation and a variety of corrosion: on the other hand due to the high efficiency of production, mold temperature rise and reduce very intense, and the formation of cyclical changes. Therefore, the Die Casting Mould mold steel requires a higher thermal fatigue resistance, thermal conductivity and good wear resistance, corrosion resistance and high temperature mechanical properties. Die Casting Mould mold selection, mainly based on the temperature of cast metal and cast metal depending on the type. The higher the temperature, the more the die-casting mold damage and wear. As the parts of the die-casting mold under different conditions of work, by the cast metal impact and wear are also different, so the hardness requirements of the die-casting mold should be based on the use of parts and cast metal are different. For example, parts with more severe wear should have a higher hardness; for parts operating under heated conditions, they should have high thermal and high temperature performance.


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