What about the white circle at the bottom of the injection bottle?
1: improves injection speed.2: increase the mold temperature and increase the resin temperature slightly.3: improves injection pressure and lengthens dwell time.Near the 4: nozzle, there is a solidified substance (residue) that sometimes flows into the mold cavity and becomes a flow mark. The solution is to increase the concentration of the residue in the mold to prevent the residue from flowing into the finished product.5: nozzle aperture, vertical runner, cross runner, gate is too small, sometimes also become the reason.
The phenomenon of a ring pattern near the gate. This phenomenon is caused by the melting of the molten resin on one side of the die cavity and the other on the side of the mold.
The phenomenon of silver white streak appeared on the surface of the resin molded flow direction. (Guangdong vallink modified plastics provided)When the 1: resin breaks down during overheating, the setting temperature of the heating cylinder is lowered.Insufficient drying of 2: resin.3: air mixing will also cause this phenomenon, then can improve the back pressure to try. The temperature of the heating cylinder under the hopper is too high and sometimes prevents air from being discharged.4: can cause too much injection speed. The reason is that the mold gate is too small and cut the high heat of the nozzle aperture is too small will exhibit the same phenomenon, so you have to reduce the injection speed, to prevent the burning, or the gate, or the nozzle diameter enlargement on the line.
