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Basic characteristics of mold processing

Posted by: Zhou casting 2021-07-30 Comments Off on Basic characteristics of mold processing

1. High processing precision requirements A pair of molds are generally composed of a concave mold, a punch mold and a mold base, and some may also be a multi-piece split module. Therefore, the combination of the upper and lower molds, the combination of the inserts and the cavities, and the flattening between the modules require high processing precision. Precision molds often have dimensional accuracy of up to μm.
2, complex surface Some products, such as automotive covers, aircraft parts, toys, household appliances, the shape of the surface is composed of a variety of curved surfaces, so the mold cavity surface is very complicated. Some surfaces must be processed mathematically.
3, small batch production of mold is not mass production in batches, in many cases often only one.
4, the process is more than the use of milling, boring, drilling, reaming and tapping in the mold processing.
5. Repetitive production The use of molds has a long life. When the use of a mold exceeds its life, a new mold is replaced, so the production of the mold is often repetitive.
6. Profiling processing Sometimes there are no drawings and no data in the production of molds, and it is necessary to carry out profiling processing according to the actual objects. This requires high precision and no distortion.
7. Excellent mold material and high hardness The main materials of the mold are made of high-quality alloy steel, especially the high-life mold, which is often made of Crl2, CrWMn and other Laisite steel. This type of steel has strict requirements from rough forging, processing and heat treatment. Therefore, the preparation of the processing technology can not be ignored, heat treatment deformation is also a problem that needs to be taken seriously in processing.
According to the above many characteristics, it is necessary to meet the processing requirements as much as possible in the selection of machine tools. For example, the function of the numerical control system is strong, the precision of the machine tool is high, the rigidity is good, the thermal stability is good, and the contouring function is provided.
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