Molding Cycle Of Injection Mold

The time required to complete an injection molding process is called the molding cycle, also known as the molding cycle. It actually includes the following parts: Molding cycle: The molding cycle directly affects labor productivity and equipment utilization. Therefore, in the production process, we should shorten the relevant time in the molding cycle as far as possible under the premise of ensuring quality. In the whole molding cycle, the injection time and cooling time are the most important, which have a decisive impact on the quality of the product. The filling time in the injection time is directly inversely proportional to the filling rate, and the filling time in production is generally about 3-5 seconds. The pressure holding time in the injection time is the pressure time of the plastic in the cavity, which accounts for a large proportion in the entire injection time, generally about 20-120 seconds (ultra-thick parts can be as high as 5 to 10 minutes). Before the melt at the gate is frozen, the amount of pressure holding time has an effect on the dimensional accuracy of the product, if it is later, it has no effect. There is also an optimal value for the holding time, which is known to depend on the feed temperature, mold temperature, and the size of the main channel and gate. If the size of the main channel and gate and the process conditions are normal, it is usually the pressure value that determines the minimum fluctuation range of the product shrinkage. The cooling time is mainly determined by the thickness of the product, the thermal and crystallization properties of the plastic, and the mold temperature. The end of the cooling time should be in order to ensure that the product does not cause changes when demoulding as the principle, the cooling time is generally about 30 to 120 seconds, the cooling time is too long is not necessary, not only reduce the production efficiency, the complex parts will also cause demoulding difficulties, and even produce demoulding stress when forced. Other times in the forming cycle are related to whether the production process is continuous and automated and the degree of continuity and automation.