Test mode to quality check mold after installation, whether can produce qualified products. The order is as follows:
1, test, inspection of raw materials should be whether it meets the requirements, do not meet the requirements shall be processed or replacement.
2, according to the selected process parameters of the barrel and nozzle is heated to a suitable temperature, the judgement of whether the temperature the best way is in the nozzle and mold sprue excuse, with the lower injection pressure, melt in the nozzle flow out slowly, and then observe the flow of material outflow.
3, if the glazed Australia accompany you through without bubbles, lumps, silver, color, material flow smooth and bright, indicating the barrel temperature and nozzle temperature suitable for, can test mode.
4, test mode, first select the low pressure, low temperature and long time molding, then according to the pressure, temperature and time sequence of changes, in order to get the better process parameters.
5, if the injection pressure is small, the cavity full of difficult, can increase injection pressure. When the pressure effect is not apparent, again the change of temperature and time, when the time is still not full, then increase the temperature. But can not be reached too fast, too, in order to avoid overheating degradation plastic.
6, in the production of thin wall and large plastic parts, generally uses the high-speed injection, the wall thickness and the plastic area of small, low injection is generally adopted.
7, if the high-speed and low-speed injection were full of cavity, in addition to glass fiber reinforced plastic, can be used for low speed injection.
8, for the high viscosity, poor thermal stability of plastic, the slower speed of screw and slightly low pressure feed and pre plastic better.
9, the low viscosity and good thermal stability of plastic, can be used to quickly screw speed and slightly higher back pressure.
10, in the nozzle temperature is suitable, it can improve the productivity of the nozzle form; but the nozzle temperature is too high or too low, need to use each molding cycle nozzle moving backward forms.
11, mold plastic parts according to the pattern in the requirements carefully examined, such as plastic parts can be considered qualified, qualified mold.