The design and manufacture of injection molds for plastic molds mainly solve the following problems:
1. Reasonably choose the structural form of the injection mold; in order to design an injection mold with a reasonable structure, reliable quality and convenient operation, according to the drawings and technical requirements of plastic products, research and select appropriate molding methods and equipment, and propose a structural scheme for the injection mold , and fully solicit the opinions of relevant parties for analysis and discussion. According to the needs of mold design and processing, the plastic parts can be modified, but the modification can only be carried out with the consent of the user.
2. The size of injection molding parts is calculated correctly. The plastic part is a direct factor to determine the shape, size and surface quality of the plastic part, which has a great relationship and needs special attention. The average shrinkage method can usually be used for the calculation of the part size of the part. For plastic parts with high precision and need to control the trimming allowance, it can be calculated according to the tolerance zone method. For large precision plastic parts, try to use the analogy method. By measuring the shrinkage rate of plastic parts in different directions, to compensate for some theoretical Influence of factors that are difficult to consider.
3. The mold design should be easy to manufacture. When designing the injection mold, try to make the mold design simple and low cost. Especially for those more complex formed parts, it must be considered whether to use ordinary machining methods or special machining methods. If a special processing method is used, how to assemble after processing, and similar problems need to be considered and solved when designing injection molds, and at the same time, the problem of mold repair after the mold should be considered and solved, leaving enough mold allowance on the mold .
4. The injection mold design should be efficient and safe. This requirement involves many aspects of injection mold design, such as the injection system needs to be filled, mold closed, good temperature adjustment, and flexible and reliable demolding mechanism.
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