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What Are the Specific Steps for Plastic Mold Processing?

The mold from custom plastic injection molding is a commonly used molding mold in plastic products and the basis for the structure and size accuracy of plastic products. Injection molding is a processing method used for mass production of products using molds, specifically referring to the high-pressure injection of heated and melted plastic into the mold cavity by an injection machine, and obtaining molded products after cooling and solidification. A set of plastic mold products from scratch to completion, what processes are involved, and what should be noted?

Process analysis of plastic mold products

Before mold design, the designer should fully analyze and study whether the plastic products comply with the processing principle of injection molding, and carefully negotiate with the product designer to reach a consensus. This includes necessary discussions on the geometric shape, size accuracy, and appearance requirements of the product to avoid unnecessary complexity in mold manufacturing.

Structural design of plastic mold products

Design is the source of precise molding, and the quality of the design of a plastic mold product is a major factor. It is necessary to understand the processing technology and the processing capability of the mold factory itself. Therefore, to improve the level of mold design, the following points should be done:

  • Understand every detail in each set of mold designs and understand the purpose of each part in the mold.

  • When designing, refer to similar designs in the past, and understand the situation during mold processing and product production, and learn from experience and lessons.

  • Learn more about the working process of the injection molding machine to deepen the relationship between the mold and the injection molding machine.

  • Understand the processing technology and the characteristics and limitations of each type of processing.

  • Understand the trial mold results and modification of the mold designed, and learn from the lessons.

  • Use successful mold structures in the past as much as possible when designing.

  • Learn more about the impact of mold cooling on product production. Study some special mold structures and learn the latest mold technology.

Determination of materials for plastic mold products

Before choosing the production material, we must first determine the relevant characteristics of the production product, and combine the actual processing and heat treatment capabilities of the plastic mold product factory to make the correct choice.

Parts processing and assembly of plastic mold products

In addition to giving the best structure and reasonable tolerance in the design, the accuracy of the mold is also crucial in parts processing and mold assembly. Therefore, the choice of processing accuracy and processing method plays an absolute dominant role in mold manufacturing. The size error of the formed product is mainly composed of the following parts:

  • The manufacturing error of the mold is about 1/3, and the error caused by mold wear is about 1/6;

  • The error caused by uneven shrinkage of molded parts is about 1/3;

  • The error caused by the inconsistency between the scheduled shrinkage and the actual shrinkage is about 1/6.

Trial of plastic mold products

The mold has been designed and processed, whether it can be used depends on the effect of the mold test. Plastic mold product testing is mainly to determine the specific effect of mold production products, and it is also an important step to check whether the mold is qualified.

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