1. The screw in the driving of the drive system, to transfer the material from the hopper forward, compaction, heater, outside the cylinder screw and barrel of the shear and friction, the material melt gradually, in the cylinder head has accumulated a certain amount of molten plastic, under the pressure of the melt, screw back slowly.The distance from the back is determined by the amount required for an infusion of the metering device, and the screw stops rotating and receding when the desired injection amount is reached.
2. Mould and lock.
Mode locking mechanism of the mould of template and installed in the dynamic template moving mould parts and mold dynamic model on dynamic template clamping and lock, in order to make sure the molding can provide enough clamping force make the mold locking.
3. Advance of injection device.
When the mold is finished, the whole injection seat is pushed forward, and the nozzle of the injector is completely fitted to the mold main gate.
4. Injection and pressure protection.
Completely after laminating mould clamping and the nozzle, the hydraulic cylinder injection into the high pressure oil, promote relative cylinder screw moved forward, will accumulate in the cylinder head of melt with enough pressure injection mould cavity, to make plastic volume contraction due to lower temperature, to ensure the density of plastic parts, dimension precision and mechanics performance, should be within the mold cavity on the melt to keep certain pressure, to supplement the materials.
5. Pressure relief
When the melt at the mold gate is frozen, the pressure can be unloaded.
6. The injection device recoils.
Generally speaking, after the unloading is completed, the screw can be rotated and backward to complete the next feeding and preplasticizing process.(in general, the removal of the main gate of the injection seat is cancelled, and this action is carried out when the material with serious salivation is more serious, such as PA).
7. Mold opening and molding.
After cooling and finalizing the molded parts in the mold cavity, the mold locking mechanism is opened and the plastic parts in the mold are released.