Cause analysis of dissatisfaction of injection molding products

1. Reasons for injection molding machine:
The plasticizing amount or heating rate of the machine is variable, so the machine with large plasticizing amount and heating power should be selected;
The wear of the screw and the barrel or the rubber head causes the material return and the actual filling modulus is not correct; The actual temperature of the barrel is too low due to the failure of heating system such as thermocouple or heating ring; The wear of the sealing element of the injection cylinder causes oil leakage or backflow, which cannot reach the required injection pressure; Pressure consumption is caused by excessive resistance caused by too small nozzle inner hole or improper nozzle center adjustment.
2. Reasons for injection mold:
1. The mold temperature should be properly increased due to the difficulty of feeding due to the low temperature of the part or the whole mold;
2. The distribution of mold cavity is unbalanced. The wall thickness of the part is too thin, resulting in excessive pressure consumption and poor mold filling. The wall thickness of the whole part or part shall be increased or the auxiliary flow or gate can be set near the insufficient filling area.
3. Pressure loss caused by too small flow channel of the mold; When it is too large, the glue injection will be weak; Too rough will cause dissatisfaction with the parts. The size of runner shall be properly set, and the transition between the main runner and the runner, the transition between the gates or the turning of the gate itself shall be appropriate arc transition.
4. The exhaust of the mold is poor. The material entering the mold cavity is blocked by the pressure of the gas that cannot be discharged, resulting in insufficient filling. The gap of the screw can be fully used to exhaust or the clamping force can be reduced. The parting surface can be used to exhaust. If necessary, the exhaust channel or air hole should be opened