What is the effect of injection mold temperature on injection parts?

1. Influence of mold temperature on appearance design

If the mold temperature is too low, it will affect the grain size of plastic and reduce the fluidity of solution, and it is likely to produce the defect of underinjection. However, the temperature of the injection mold can not be too high, too high is very easy to stick to the mold, but also continue to have significant bright spots in parts of the plastic. And if the temperature of injection mold is too low, it will also lead to injection parts is not easy to mold, mold out of the case is very easy to bruise injection products, especially plastic parts with lines on the surface.

2. Influence of product size

The mold temperature of injection mold is too high, which will cause the decomposition reaction of plastic wear resistant materials. The shrinkage rate of rubber and plastic products will be expanded, and the product size will be reduced. In view of crystalline polymer, increasing the mold temperature can make the specification of plastic parts stable, prevent the state of crystallization, but will cause the forming cycle time increase and the shortcomings of plastic parts become brittle.

3. Influence of mold temperature on deformation

If the cooling system design of injection mold is not scientific or the temperature control is unreasonable when the injection mold is manufactured, the cooling of rubber and plastic products is sufficient, it will cause the expansion and contraction deformation of plastic parts. Injection mold temperature difference is too large, will make the plastic refrigeration is not symmetrical, plastic collection is not consistent, will cause plastic deformation and caused by plastic deformation of injection molding parts, uneven wall thickness and complex style of plastic parts caused by the probability of expansion and contraction deformation is higher.

4. Influence of mold temperature on internal stress

The mold temperature of injection mold is low, the dissolution mark of plastic parts is significant, and the compressive strength of products is reduced. Crystalline plastic, the higher the grain size, plastic parts stress cracking tends to be greater.

Low die temperature can reduce forming shrinkage of plastic parts. The symmetrical mold temperature, short cooling time and faster injection speed can reduce the expansion and contraction deformation of plastic parts.

The surface quality of plastic parts can be improved by raising mold temperature. In the process of injection molding, the mold temperature immediately harms the plastic filling, the molding of plastic parts, the cycle time of rubber and plastic products and the quality of plastic parts.