1. Heating, preplasticization:

Driven by the drive system, the screw transports the material in the hopper forward and compacts it. Under the mixing action of the external heater of the barrel, under the shearing and friction of the screw and the barrel, the material gradually melts, and a certain amount of molten plastic accumulates in the upper part of the barrel head, and a certain amount of molten plastic accumulates in the lower part of the barrel. Under the pressure of the melt, the screw slowly retreats. The distance back is adjusted according to the amount required for one injection of the metering device. When the predetermined injection volume is reached, the screw stops rotating and retreats.

2. Clamping and locking:

The mold clamping mechanism pushes the moving part of the template and the mold installed on the moving template, and closes and locks the mold moving part on the moving template to ensure that it can provide sufficient clamping force to lock the mold during molding.

3. Push the injection device:

When the clamping is complete, the entire injection seat is pushed and moved forward so that the nozzle of the injection machine fits perfectly into the main runner of the mold.

4. Injection and pressure packing:

After the clamping and nozzle are fully fitted to the mold, the injection hydraulic cylinder enters the high-pressure oil, pushes the screw forward relative to the barrel, and injects the melt accumulated at the head of the barrel into the cavity. The mold has sufficient pressure, the temperature drops, the plastic volume shrinks, in order to ensure the compactness, dimensional accuracy and mechanical properties of the plastic parts, it is necessary to maintain a certain pressure on the melt in the mold cavity to ensure the compactness, dimensional accuracy and mechanical properties of the plastic parts. Supplementary materials.

5. Pressure relief:

When the melt at the gate of the high-precision plastic mold freezes, the pressure is released.

6. Back of the injection device:

Generally speaking, after the pressure relief is completed, the screw can rotate and retreat to complete the next step of the feeding and preplasticization process. This action is performed when molding materials with severe salivation such as PA.

7. Mold opening and ejection of plastic parts

After the plastic parts in the high-precision plastic mold cavity are cooled and set, the mold clamping mechanism opens the mold and pushes the plastic parts in the mold.