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Injection molding is a common manufacturing method in the plastics processing industry through which a large number of plastic parts can be produced. However, during the injection molding process, a problem known as underfilling may occur, which not only affects the quality of the product, but may also lead to production delays and increased costs. So, what should you do when faced with the problem of underfilling during injection molding process?

Under injection is when the plastic melt fails to completely fill the cavity of the mold, resulting in an incomplete or incorrectly shaped finished product. This can be due to a variety of reasons, including problems with materials, equipment, molds and process parameters.

So how to solve the problem of underfilling in injection molding processing?

First, the raw material for injection molding processing needs to be checked. If the fluidity of the raw material is not enough, or its melting point is too high, it may lead to under-injection. Therefore, it is very important to choose the right plastic material.

If there is no problem with the raw material, then the equipment needs to be checked. The injection pressure and speed of the injection molding machine, as well as the barrel and nozzle temperatures, all affect the flow of the plastic. If these parameters are not set appropriately, under-injection may also result. Therefore, the parameters of the equipment need to be set reasonably according to the physical properties of the plastic material and the structural requirements of the product.

In addition, attention needs to be paid to the design and maintenance of the mold. The cavity structure of the mold, the location and size of the gate, and the design of the cooling system may all affect the flow and cooling of the plastic. If the mold is not designed properly, or if it is not maintained properly, it may lead to under-injection. Therefore, regular inspection and maintenance of the mold is needed to ensure that it is in good working condition.

Then, the influence of injection molding process parameters needs to be considered. The injection molding process includes the stages of filling, pressure holding, cooling and demolding, and the process parameters at each stage will affect the flow and molding of the plastic.

In addition, attention needs to be paid to the control of the production process. During the injection molding process, the working status of the equipment and the quality of the product need to be monitored in real time, so that problems can be found and solved in a timely manner. If the under-injection problem is found, production needs to be stopped immediately to find out the cause of the problem and take appropriate measures. Only in this way can we ensure the quality of products and improve production efficiency.