Advantages and disadvantages of silicone injection molding machines and adjustments to molded products

Silicone article molding is a process for producing silicone articles suitable for thermoplastics. The tube blank obtained by extrusion or injection molding is placed in a mold, and compressed air is blown into the tube blank to make it close to the cavity wall.
Injection molding process of silicone products effects product accuracy: when producing some important injection molded parts with precision dimensions, the size of each part is allowed to fluoresce within a very small range, or even only one or two fluorations are required. During the production process, the main factor that actually affects the dimensional accuracy of injection molded parts is the shrinkage rate of the injection molded parts. The greater the shrinkage, the wear the accuracy. Therefore, since the shrinkage rate of PP and POM injection molded parts is large, the accuracy of their injection molded parts is actually poor. The shrinkage of other materials is generally not very small, so the dimensional accuracy of the injection molded parts is not very high under normal injection molding conditions.
In fact, the shrinkage rate of the injection molded parts can be reduced by adjusting the machine table, thereby adhering the purpose of improving the dimensional accuracy of the injection molded parts. We only need to greatly increase the injection time and pressure or pressure preservation to reduce the shrinkage rate of the injection molded part. The shrinkage rate is significantly reduced and the dimensional accuracy can naturally be improved. Due to the limitations of the injection molding machine quality, the injection pressure should generally not be adjusted too high, otherwise a large amount of injection will occur. Therefore, in the common injection molding machine, the main purpose of improving the dimensional accuracy of the injection molded parts is to increase the injection time or the pressure holding time. In order to ensure the dimensional accuracy of the injection molded parts, the accuracy of the mold is the first condition that needs to be guaranteed. It is more important to choose production that is stable, reliable (with small parameter fluids) and has sufficient pressure.