Problems that are prone to occur in the injection molding process of injection mold products

1. Why does the injection mold product have a dark gloss and poor gloss?

Injection mold is a tool for producing plastic products; It is also a tool to give plastic products a complete structure and precise dimensions. In the process of processing and manufacturing, injection molds often encounter the phenomenon of dark color and poor gloss, so what is the reason for the dark color and poor gloss?

In the normal injection mold production and manufacturing process, the gloss of the mold surface is mainly determined by the type of plastic, colorant and the finish of the mold surface.

The causes and solutions for dark color and poor gloss are mainly as follows.

1. The finish of the injection mold is poor, there are rust on the surface of the cavity, etc., and the mold exhaust is poor.

2. Too much recycled material is used, the quality of plastic or colorant is poor, mixed with water vapor or other impurities, and the quality of the lubricant used is poor.

3. If the gating system of the injection mold is defective, the cold material well should be enlarged, and the runner, polishing sprue, runner and gate should be increased.

4. The material temperature and mold temperature are low, and the gate can be heated locally if necessary.

5. The plastic should be fully plasticized, but the degradation of the material should be prevented, the heating should be stable, and the cooling should be sufficient, especially the thick-walled one.

6. The clamping force should be sufficient in the manufacturing process of injection mold.

7. The processing pressure of the injection mold is too low, the speed is too slow, the injection time is insufficient, and the back pressure is insufficient, resulting in poor compactness and dark surface.

8.1 Prevent cold material from entering the workpiece, and use self-locking springs or reduce the nozzle temperature if necessary.

The above 8 points provided by Fan Shida can well avoid the phenomenon of dark color and poor gloss of injection molds, even if this phenomenon occurs in the production process, it can also be a good remedial measure, minimize the impact on the production progress of the enterprise, and increase the production efficiency of the enterprise.