Problems needing attention during equipment shutdown
When the injection molding machine is shut down, clean the unused materials in the equipment to avoid dry materials adhering to the equipment, which is difficult to clean and affects the next normal use. Remember to wait for the equipment to cool down completely before cleaning, so as not to damage the equipment. Secondly, when stopping the machine, first turn off the switch of the equipment and then unplug the power. The following injection molding machine manufacturer will take you to learn more about the problems that should be paid attention to when stopping the injection molding machine.
First of all, if the injection molding machine is suspended, it is necessary to spray the remaining glue or let the plastic clean the remaining plastic of the injection cylinder or barrel through the injection molding machine for many times. In case of plastic discoloration, the number of spraying will increase. During minor repair, the heater of the injection cylinder must be adjusted to a lower value, such as 150 ℃, so as to minimize the possibility of thermal decomposition. Before injection of thermally stable plastics (such as PS or PE), If the machine has been shut down for one night in advance, just turn off the sliding plate at the bottom of the hopper and the injection cylinder heater (only turn on the heater of the injection nozzle), spray the injection cylinder clean, after the injection nozzle is completely clean, cool the barrel as high as possible, and turn off all equipment after the injection molding machine is cooled. The injection molding machine is fully ready for reheating.
Second, if the temperature of the injection cylinder or barrel of the injection molding machine is high, only the above steps need to be changed slightly to prevent the resin from being decomposed by heating. For example, turn off the heater of the injection cylinder (only turn on the heater of the injection nozzle), or cool the barrel as high as possible. During this period, spray the remaining resin continuously, close the sliding plate at the bottom of the hopper, and try to spray the inclined rubber in the barrel. If there is no more plastic spray, You can turn off the equipment for next use.
In addition, if the plastic is decomposed or burned in the injection molding machine, it will change color and turn the finished product into waste parts. In this case, the injection molding machine must be completely closed and sprayed clean. The preventive method is to spray the heat sensitive resin with a plastic with high thermal stability, so as to withstand subsequent reheating.
In addition, some plastics (such as POM and PVC) are easy to decompose. If the injection molding machine suddenly stops on the way, the heater of the injection nozzle should be turned on before continuing injection molding. The heater of the injection cylinder can be started only when the plastic has the injection nozzle melted.
If you encounter such a situation, you can try to operate according to the methods in the article, which will bring you unexpected results. Thank you for your reading and your constant attention and support.
