Usually, if the thickness of the product exceeds 1 cm, such as cubes and spheres, it is easy to form weld marks during injection molding! How to adjust through the process? In addition, how to improve as a material change?
Thick cubes, spherical products can only be shot through multiple gates to avoid welding marks. The following is for reference (1) The plastic part has a complex appearance shape (mold structure), which results in the fountain effect in the flow pattern of the raw materials, such as the fountain effect. This situation can be adjusted by adjusting the forming conditions such as increasing the injection pressure or raising the barrel Temperature to improve. In addition, the mold can also be considered as a vacuum method to achieve the pressurization effect or add a heating device. The induction coil (Induction Coil) heating method is used to heat the mold cavity surface, so that the temperature of the mold surface with micro-features can be raised in a short time. Warm to improve the fluidity, so that the injection can be carried out smoothly. (2) The fluidity of hot melt plastic raw materials is poor, which can be improved by increasing the flow ratio of plastic raw materials (Melt Index). (3) Foreign matter such as air, volatiles, or release agent is caught in the confluence of hot melt plastic raw materials. If the mold vent can be effectively improved, the problem can be improved by allowing gas to escape.
