Weld line
Weld line is due to the molten resin front part from different directions are cooling, complete fusion at the combination not produced.
In general, the main influence on appearance, have an impact on the coating, electroplating. Serious when, have an impact on the strength of the product (especially serious in fiber reinforced resin,). Can refer to the following items to be improved:
1) adjust the molding conditions, improve liquidity. For example, to raise the temperature of the resin, improve the mold temperature, injection pressure and the rate of increase.
2) additional exhaust slot, in producing weld trace is arranged at the push rod is also conducive to the exhaust.
3) to minimize the use of release agent.
4) set the technology overflow and as the weld line generation, forming later to be cut to remove.
5) if only affect the appearance, you can change the burning of the four position, to change the weld line location. Or will the weld line position to produce processing for dark glossy, be modified.