Five steps in the production process of injection molding machine molds

Injection molding machine mold structure design:

A set of high-quality molds requires not only good processing equipment and skilled injection molding machine mold manufacturing workers, but also another very important factor is to have a good injection molding machine mold design, especially for complex molds. The quality of mold design accounts for more than 80% of the mold quality. An excellent injection molding machine mold design is: under the premise of meeting customer requirements, the processing cost is low, the processing difficulty is small, and the processing time is short.

 

If you want to do this, you need to not only meet customer requirements, but also understand the injection molding machine, mold structure and processing technology and the mold factory's own processing capabilities. Therefore, to improve the level of injection molding machine mold design, the following points need to be achieved:

 

1. Understand every detail of each set of injection molding machine mold design and understand the purpose of each part in the mold.

 

2. Refer to previous similar designs when designing, and understand the situation during mold processing and product production, and learn from the experience and lessons.

 

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

 

4. Go to the factory to learn more about the processing technology of the processed products, and understand the characteristics and limitations of each processing.

 

5. Understand the mold trial results and mold modification of the injection molding machine mold designed by yourself, and learn lessons.

 

6. Try to use the injection molding machine mold structure that was relatively successful in the past when designing.

 

7. Learn more about the impact of water entering the injection molding machine mold on the product.

 

8. Study some special injection molding machine mold structures and understand the latest injection molding machine mold technology.

 

Determine the injection molding machine mold material and select standard parts

When selecting the injection molding machine mold material, in addition to considering the accuracy and quality of the product, it is also necessary to combine the actual processing and heating treatment capabilities of the mold factory to make the right choice. In addition, in order to shorten the manufacturing cycle, existing standard parts should be used as much as possible.

 

Injection molding machine parts processing and mold assembly:

In addition to giving the best structure and reasonable tolerance matching during design, the accuracy of injection molding machine molds is crucial to parts processing and mold assembly. Therefore, the choice of processing accuracy and processing method plays an absolute leading role in the manufacturing of injection molding machine molds.

 

In order to reduce the manufacturing error of injection molding machine molds, the processing accuracy of molds should be improved first. With the use of CNC machine tools, this problem has been well controlled. In addition, in order to prevent errors caused by mold wear and deformation, when the molds have high processing accuracy requirements and large product quantities, the cavity, core and other pipe parts should be quenched. In medium and large molds, in order to save materials and facilitate processing and heating treatment, the injection molding machine mold design should try to use splicing structure.

 

In order to solve the errors caused by uneven shrinkage of molded parts and the inconsistency between the expected shrinkage and the actual shrinkage, 1/3 of the product tolerance is generally selected as the manufacturing tolerance of the injection molding machine mold during mold manufacturing. The purpose is to leave a large adjustment space for the subsequent molding process to solve the errors caused by the molding process.

 

Mold Trial

From design to assembly, a mold trial only completes 70%-80% of the entire manufacturing process. The error caused by the inconsistency between the expected shrinkage and the actual shrinkage, the smoothness of demoulding, the cooling effect, and especially the impact of the gate size, position, and shape on the product precision and appearance must be tested through mold trials. Therefore, mold trial is an indispensable step to test whether the injection molding machine mold is qualified and to select the best molding process.