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7 Characteristics of Plastic Injection Mould Processing

The plastic injection mould processing is to first add the plastic into the mould, and then the mould is continuously rotated and heated along the two vertical axes. The plastic in the plastic injection mould is gradually uniformly coated and melted and adhered to the entire cavity surface under the action of gravity and heat energy. It is moulded into a desired shape and is obtained by cooling and setting. The characteristics of plastic injection mould processing are as follows:
  1. Various processes: Various processes such as milling, drilling, reaming and tapping are always used in the processing of plastic injection moulds.
  2. Small volume plastic injection mould manufacturing: Plastic injection mould manufacturing is not mass-produced in large quantities. In many cases, it is often necessary to manufacture a pair of plastic injection moulds to complete the desired processing of plastic parts.
  3. Profiling processing: In the plastic injection moulds making, there are sometimes not only have no drawings but also have no any data. So it is necessary to carry out profiling processing according to the actual object, which requires the plastic injection mould to be imitation high in precision and not deformed.
  4. Repeated production: The use of plastic injection moulds also has a certain service life. When the use of a pair of plastic injection mould exceeds its life, it is necessary to replace the new plastic injection mould, so the plastic injection mould manufacturing is often repetitive.
  5. Complex shapes: Some plastic parts, such as automobile covers, aircraft parts, toys, and household appliances, have a surface that is composed of a variety of curved surfaces. Therefore, the cavity surface of the plastic injection mould is complicated, and some surfaces must be processed by mathematical calculations.
  6. High processing accuracy requirements: A pair of plastic injection moulds is generally composed of a die, a punch and a mould base, and some may also be a multi-piece split module. Therefore, the combination of the upper and lower moulds, the combination of the insert and the cavity, and the flattening between the modules require high processing precision, and the dimensional accuracy of the precision mould often reaches μm level.
  7. Plastic injection mould material is excellent, high hardness: The main materials of plastic injection moulds are mostly made of high-quality alloy steel, especially high-life plastic injection moulds. Therefore, the preparation of plastic injection mould processing technology can’t be ignored, heat treatment deformation is also a problem that needs to be taken seriously in plastic injection moulding processing.

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