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The conditions for producing high-quality plastic parts

May 8, 2026

No. Key Points of the Mold
1 Injection glue point and exhaust
2 Injection glue method
3 Mold material
4 Mold accuracy
5 Mold temperature
6 Mold roughness
7 Fillet radius of sprue bushing
8 Shrinkage
No. Injection Molding Machine Selection
1 Electric drive: thin-walled products, low viscosity materials
2 Hydraulic drive: thick-walled products, high viscosity materials
No. Key Points of Screw and Barrel
1 Screw diameter corresponds to the weight of plastic products
2 The screw structure corresponds to the physical properties of the plastic
3 Structure ratio: compression ratio, length-diameter ratio, three-segment proportion
4 The screw structure corresponds to the molding cycle of plastic products
5 The cooling time of thin-wall and thick-wall molds is different, and the plasticization and retention time of raw materials are different
6 Screw material corresponding to plastic wear resistance, corrosion resistance, high temperature resistance and viscosity resistance
7 Nozzle length, R-angle, perforation, internal flow path length
No. Common Issues
1 Black spots, blackening, darkening
2 Yellow clouding, black clouding
3 Colour streaks
4 Unstable melt glue
5 Unstable shooting endpoint
6 Short service life (corrosion and wear) and glue leakage