How to determine the sealing performance of injection molding machines

1. How to determine if the injection molding machine is depressurized?

Use mold adjustment to tighten the mold too tightly, so that the machine can maintain high pressure locking but cannot lock it. Adjust the pressure flow rate of the high-pressure lock to the maximum, manually press the lock button, keep pressing it and do not release it, observe the pressure gauge to see if it can maintain the pointer still. If the pointer does not slowly slide down, it means that the oil pump has not released pressure. If the pointer slowly slides down, it means that the oil pump has released pressure

2. How to determine the sealing performance of the screw system (sealing performance of the check ring/screw)

After the glue is melted in production, extend it for a while to ensure that the product and flow system are completely cooled. Change the semi-automatic mode to manual mode and start spraying glue. At the same time, observe the position of the screw. If the screw slowly moves forward, it indicates that there is glue leakage in the screw system. Otherwise, there is no glue leakage.