The injection molding machine works similarly to the syringe for injection. It uses the thrust of the screw check ring to inject the plasticized molten state (i.e., the viscous flow) into the closed cavity and solidify. The process of obtaining the product after shaping. Injection molding is a cyclic process, and each cycle mainly includes: quantitative feeding - melt plasticization - pressure injection - filling mold cooling - mold extraction. After removing the plastic part, the mold is closed again and the next cycle is performed.
The injection molding machine converts the plastic granular material into a final plastic part by circulating, injecting, holding, cooling and the like. Thermoplastic injection molding machines typically use clamping tonnage or shot size as a simple machine specification. Other parameters that can be used include injection rate, injection pressure, screw design, mold thickness, and guide rods. Spacing and so on. According to the function classification, there are roughly three types of injection molding machines:
(1) general-purpose injection machines;
(2) precision and tight-fitting injection machines;
(3) high-speed, thin-thickness injection machines.
The main auxiliary equipment of the injection molding machine includes resin dryer, material processing and conveying equipment, pulverize, mold temperature control machine and condenser, mechanical arm for plastic part demoulding, and plastic parts processing equipment.