One: The injection molding material should be in a molten state with low viscosity in the barrel of the injection molding machine. When the molten plastic flows at high speed through the nozzle and the mold runner with a small cross-section, the temperature instantly increases from 70-90 degrees to about 130 degrees, reaching a critical solidification state, which is also the transition point of the low fluidity of the material. At this time, the injection pressure Between 118-235MPa, the injection speed is generally 3-4.5m/s.

Two: Thermosetting plastics contain more than 40% fillers, the viscosity and frictional resistance are large, and the injection pressure should be increased accordingly. Half of the injection pressure should be consumed on the frictional resistance of the gating system.

3: The raw material produces water and gas during the curing reaction, and the cavity must have a good exhaust structure, otherwise defects such as bubbles will be left on the surface of the injection molded parts.