The problems of plastic molding production we may have when we are producting

2025-03-19 15:11:56

Here are some problems that may be encountered in the process of producing products with plastic molds:

1. Mold filling problems: Issues such as incomplete filling of the mold cavity may occur, which can be caused by factors like insufficient injection pressure, too low melt temperature, or improper gate design.

2. Warpage and deformation: The product may warp or deform after cooling due to uneven cooling, excessive internal stress, or an improper ejection system.

3. Surface quality issues: Problems like surface scratches, roughness, or sink marks may appear. These can be related to the surface finish of the mold, the molding process parameters, or material properties.

4. Flash formation: Flash may occur at the mold parting line or other locations, which is often due to excessive injection pressure, worn - out mold seals, or incorrect mold clamping force.

5. Air entrapment: Air may be trapped in the mold cavity, leading to defects such as voids or burn marks. This can be caused by poor venting design or high - speed injection without proper air - release measures.

6. Material degradation: During the molding process, the plastic material may degrade if the processing temperature is too high or the residence time is too long, affecting the mechanical properties and appearance of the product.

7. Mold wear and tear: Frequent use of the mold can lead to wear and tear of its components, such as the cavity surface, ejector pins, and guide pins, which may affect the dimensional accuracy and quality of the products.

8. Dimensional inaccuracy: The dimensions of the produced products may deviate from the design requirements due to factors like mold thermal expansion, shrinkage of the plastic material, or inaccurate mold manufacturing.