Waste Plastic Recycling Granulator Common Fault And Solution

In actual application of plastic granulator, often appear some abnormal phenomena, this will affect the work orderly, plastic granulator, the author of this paper the problems often shows some self-help screening method, shorten the processing time of a partial failure, thus ensuring plastic granulator can long-term stable operation, and some guidance and reference for plastic granulator operators.
First, start the main motor, the main motor is less than or instantaneous shutdown
   Causes:
   1. The main motor is not connected
   2. Insufficient heating time or a heater does not work, resulting in excessive torque, so that the motor overload
   Treatment method:
   1. Check the wiring of the main motor
   2. Check the temperature display of each section and find relevant records to confirm the preheating and heating time
   3. Check whether the heaters are damaged or wired badly
Two, the main motor rotates, but the screw does not rotate the cause:
   1. The transmission belt is loose and slips
   2. The key is cut off
   3. Gearbox failure
   Treatment method:
   1. Adjust the center distance of the two pulleys and tighten the belt
   2. Check the safety key, analyze the reason for cutting and replace it
   3. Check the gear box
Three, the screw has speed display but can not squeeze out the material
   Causes:
   1. There is no material in the hopper, and the feeding port is blocked by foreign bodies or produces "bridging", which can not be discharged
   2. The screw falls into the metal and other hard objects (such as nuts, etc.) to block the screw groove, and can not transport materials
   3. The screw is twisted off from the root of the feeding section
   4. The temperature of the screw and the cylinder is too high, and the inner cooling of the screw is bad, forming the phenomenon of holding the shaft
   5. Equipment wear
   Treatment method:
   1. Feed the hopper
   2. Eliminate foreign bodies at the hopper mouth or eliminate bridging phenomenon
   3. If it is confirmed that there are foreign bodies entering the extruder, the screw should be shut down and removed to remove blocked hard objects
   4. Check whether the driven pulley rotates, such as normal rotation and exclusion of "no material" or "hard blockage", it may be the screw twisted, should be immediately shut down, remove the screw replacement, repair
   5. Check the screw cooling water system and increase the screw cooling water
   6. Equipment maintenance
Four, extruded products have dirt
   Causes:
   1. Filth in the material
   2. Excessive carbon accumulation in extruder screw
   Treatment method:
   1. Replace materials
   2. Clean the screw, the light can be directly extruded by screw cleaning agent, the heavy can be removed from the screw, manual cleaning
   5. The power supply of the main motor of the extruder fluctuates greatly
   Causes:
   1. The heater in a certain section does not work and the torque is unstable
   2. The bearing of the main motor is badly lubricated or damaged, and the vibration is large
   Treatment method:
   1. Check whether the heaters in each section are damaged. If so, replace them. Check whether the connection of each section of heater is correct or firm
   2. Check motor bearings, add lubricating oil or replace bearings
Six, extrusion material is not stable
   Causes:
   1. "Bridging" of raw material feeding port
   2. The speed of the main motor is uneven and fluctuates
   3. The heating and cooling system is not well matched or the thermocouple error is too large
   Treatment method:
   1. Clean the bridge of the hopper outlet
   2. Check the main motor and control system
   3. Adjust the heating power, check the contact and installation of the thermocouple, whether the thermocouple is damaged, and replace the thermocouple if necessary.