Causes and solutions of unbalance of plastic injection molding products

The imbalance of plastic injection molding products is a common problem that may involve a variety of reasons. In order to solve this problem, we need to analyze these reasons and give corresponding solutions.

First, improper mold design

The design of hot runner is unreasonable

Hot runner is a key part of injection molding, if not properly designed, will lead to plastic melt can not evenly flow into the mold cavity, resulting in product unbalance.

Solution: Redesign the hot runner to ensure a uniform flow of melt into the mold cavity.

Die structure problem

Complex mold structure or poor design may lead to unstable injection pressure, which affects the product rubber balance.

Solution: Optimize the mold structure to ensure stable injection pressure.

Improper injection molding process parameters

Improper setting of injection pressure, temperature and other process parameters may lead to the plastic melt cannot be uniformly injected into the mold cavity, affecting the product rubber balance.

Solution: Adjust the injection molding process parameters to ensure that the melt is evenly injected into the mold cavity.

Second, the injection pressure is unstable

Excessive injection pressure

Excessive injection pressure may lead to uneven flow of plastic melt in the mold cavity, resulting in uneven product gluing.

Solution: Reduce the injection pressure so that the plastic melt flows evenly into the mold cavity.

The injection pressure is too low

The injection pressure is too small, which may lead to the plastic melt can not completely fill the mold cavity, causing the product to be unbalanced.

Solution: Increase the injection pressure to ensure that the plastic melt completely fills the mold cavity.

Third, improper selection of materials

Uneven material quality

Different batches or brands of plastic materials may have different quality, resulting in uneven product flow.

Solution: Use the same batch or brand of plastic materials to ensure stable product quality.

Material property discomfort

Different types of plastic materials have different properties, which may affect the balance of the product.

Solution: Select suitable plastic materials to ensure stable product performance.

Fourth, equipment maintenance and maintenance issues

Equipment aging

Long-term use of injection molding equipment may have parts wear, aging and other problems, affecting the product balance.

Solution: Check equipment parts regularly and replace worn parts in time.

To solve the problem of the imbalance of plastic injection products, it is necessary to start from many aspects such as mold design, injection pressure, material selection and equipment maintenance. By analyzing the specific reasons and adopting the corresponding solutions, the injection molding quality of products can be effectively improved, the rejection rate can be reduced, and the production efficiency of enterprises can be improved.