Views: 0 Author: Site Editor Publish Time: 2022-03-08 Origin: Site
The lack of material in the blow molding process is generally determined by the shape of the mold and the fluidity of the material. It may also be caused by other reasons. What are the reasons for the lack of material and how to solve it.
1. The reasons for the shortage of materials in the blow molding machine
Insufficient pressure of the molding machine, insufficient pressure in the mold, insufficient material fluidity, poor air escape in the cavity, unbalanced gate and other reasons are the main culprits that cause the lack of material in the production process of the blow molding machine. How to solve it The occurrence of these problems.
2. How to avoid the occurrence of material shortage
Lack of material is generally determined by the shape of the mold and the fluidity of the material. When the material is cut due to the setting of the molding conditions, the setting of the molding conditions should be set in the direction of good material fluidity, that is, to increase the mold temperature, the barrel temperature, and the injection speed and injection pressure.
When the design of the exhaust vent in the cavity is not clever, it will cause the air in the mold to escape, which will not only cause the product to be short of material, but also cause the product to be smeared and fusion marks.
Short-term solution to the shortage of material, increase the temperature of the mold, the temperature of the feeding barrel, increase the injection pressure, add a gas escape groove width of 5~10mm on the parting surface, increase the gate, increase the flow edge, and increase the number of injections per mold. Occasionally, if the cavity is short of material, the gate of that cavity will be enlarged, and the configuration of the flow edge and the gas escape pin will be changed to improve the finish of the mold.
The above is about the causes and solutions of material shortage in the production process of blow molding machines.