Why do injection molds need to be tested?

Why do we need to do a trial mold?

Whether plastic molds are injection molded or not is difficult to tell with the eyes. Generally speaking, molds are not directly used as products during design because they may have one or another type of defect after production. However, such defects are unavoidable before manufacturing and may not be stored or processed during the manufacturing process. Therefore, we need to conduct trial molds and analyze, evaluate, and optimize the samples produced by trial molds to meet high-quality requirements. However, most defects in molded products are caused during the plasticization and injection molding stages, and may also be due to improper manufacturing of plastic molds. Therefore, in order to avoid product defects caused by mold design, it is necessary to analyze mold design and process parameters during mold manufacturing.

What consequences will a large number of trial molds bring?

Although the process parameters and mold design of injection molds can be optimized, it will also increase the production cost of injection molds. If the injection mold structure is found to be unreasonable after trial molding, it is necessary to improve the injection mold, which will undoubtedly exceed the budget for injection molding costs. For example, some injection molds are designed well, but the craftsmanship is not in place. When the optimal molding process and injection mold are not selected in the experiment, it is obvious that the mold is made well, but the injected product is not good. Lack of complete understanding of the physical properties of plastics and inaccurate shrinkage rate often occurs. What makes people vomit blood is that many situations are not satisfactory, and even injection molds have to be scrapped and remade.

How to reduce the number of mold tests?

The number of mold tests for a set of molds depends on the following factors:

Is the optimization of the customer's product structure complete.

2. Is the street evaluation of mold drawings complete

Is the processing technology arrangement for mold parts reasonable.

4. Whether the control of the mold processing process is appropriate.

5. Is the scientific trial model effective.

Is the improvement plan for the trial mold problem strict and effective.

By doing the above 6 points well, I believe we can greatly reduce the number of mold tests and lower the production cost of injection molds