Injection plastic mold temperature refers to the temperature of the surface of the cavity when molding is being performed. In terms of mold design and molding process conditions, it is important not only to maintain an appropriate temperature but also to make it evenly distributed. Uneven mold temperature distribution will cause uneven shrinkage and internal stress, thus making the molded product prone to deformation and warpage.
The mold temperature affects the molding cycle and molding quality. In actual operation, it is set from the lowest appropriate mold temperature of the material used, and then appropriately adjusted according to the quality condition.
Increase the mold temperature to increase the crystallinity and more uniform structure of the molded product, so that the molding shrinkage is more sufficient, and the post-shrinkage is reduced. Improve the strength and heat resistance of the molded product, reduce the residual internal stress, molecular alignment, and deformation, reduce the flow resistance during filling, reduce the pressure loss, make the appearance of the molded product more glossy and good, and reduce the chance of shrinkage at the far gate. But everything has advantages and disadvantages. Increasing the mold temperature will also increase the chance of burrs and shrinkage near the gate, reduce the obvious degree of bonding lines, and increase the cooling time.