General failure and elimination method of PVC granulator

Cause: The power of the main motor is not turned on; the heating time is high, or one of the heaters does not work, causing excessive torque and overloading the motor.

Treatment method: Check whether the host circuit is connected, turn on the power; check the temperature display of each segment, confirm the warm-up temperature rise time, check whether the heaters are damaged or have poor contact, and eliminate them.

2, PVC granulator, plastic granulator screw works normally, but does not discharge

Reason: The feed of the hopper is not continuous; the foreign matter in the feed port is blocked or “bridging”; the hard metal inside the screw groove is blocked by the hard material, and the material cannot be fed normally;

Treatment method: increase the feeding amount to make the screw feeding continuous and stable; stop the foreign matter in the material port to eliminate the phenomenon of “bridge”; if it is confirmed that metal foreign matter falls into the screw groove, the plastic machinery research institute should immediately stop disassembling the screw to remove metal foreign matter.

3, PVC granulator, plastic granulator vent hole

Reason: The raw materials are not clean enough with impurities; the feed rate is too fast to make the screw extrusion unstable; the plasticizing temperature is not enough for screw extrusion.

Treatment method: clean the raw materials and then feed or replace the filter; reduce the feed amount to make the plasticized stable screw smoothly squeeze; increase the plasticizing temperature (the temperature should not be too high to prevent burn plastic and affect the production quality).

4, PVC granulator, plastic granulator main motor rotates, but the screw does not turn

Cause: The transmission V has a loose bandwidth and wear and slip; the safety button is loose or disconnected.

Treatment: Adjust the center distance of the V belt, tighten the belt, or replace the new V belt; check the safety key, analyze the cause of the break, and replace the safety key.