The method of slow injection followed by fast injection of injection mold and its application

The injection mold is injected slowly and then quickly, that is, when the injection reaches a certain set position, it is transferred to the secondary rapid injection. The switching point of the two is usually located in the early stage of filling at the beginning of injection into the cavity. The following Xiaobian will introduce the injection mold slow before fast injection method and its application in detail.

The introduction of injection mold first slow then fast injection method

The injection plant uses a slow injection, which makes the melt fill smoothly at the beginning, which is conducive to preventing the defects such as trapped gas, gas lines, melt flight, spiral and folding injection. Two-stage rapid injection is conducive to overcoming resistance to ensure adequate filling, reduce melt heat loss, and prevent the plastic parts from dark color, lack of materials and other problems.

The application of injection mold first slow and then fast injection

(1) Used to solve the water ripples and weld marks of coarse plastic parts, such as: toy plastic parts of the end of the problem of a large size PVC plastic parts of water ripples and weld marks.

② It is used to solve the problem of gas or flow lines at the gate. For example: PC plastic parts of the pouring pattern.

③ Solve the problem of oil burning and matte color around the gate.

④ It is used to prevent other problems when rapid filling is needed to fill adequately. For example, the gas or flow lines around the gate.

Of course, the injection processing plant in the production practice, in order to solve some of the other problems in the injection process, technicians can also add several injection levels in this process. Because rapid injection is easy to cause trapped gas, burning and overflow problems, it is necessary to have a slow and low pressure filling and pressure preserving process in the late injection period. The mission of Fanstar is to master the core technology of injection molding production, to communicate and analyze the technology before the production of injection molding with customers from the production needs of finished products, so that the injection mold delivery time is short, the service life is long, the mass production is fast and the finished product quality is excellent! Have the need of injection molding injection mold welcome to contact us!