PVC lay flathose Extruder common fault analysis

Plastic extruder is a common plastic machinery and equipment, in the daily operation of the extruder, the extruder will appear a variety of failures, affecting the normal production of plastic machinery, the following we on the extruder failure analysis.
Host current instability
1, production reasons:
⑴ uneven feeding.
⑵ main motor bearing damaged or poor lubrication.
Part of a heater failure, not heating.
⑷ screw adjustment pad wrong, or the wrong phase, the components interfere.
2, approach:
⑴ check the feeder, troubleshooting.
⑵ maintenance of the main motor, if necessary, replace the bearing.
⑶ check the heater is working properly, if necessary, replace the heater.
⑷ check the adjustment pad, pull out the screw to check the screw interference phenomenon.
The main motor can not be started
1, causes:
⑴ driving program is wrong.
⑵ main motor thread problems, the fuse is burned ring.
⑶ chain with the main motor-related functions
2, approach:
⑴ inspection procedures, according to the correct drive order to re-drive.
⑵ check the main motor circuit.
⑶ check whether the lubrication pump is started, check the main motor-related interlock device status. Pump is not open, the motor can not be opened.
⑷ inverter induction power is not finished, turn off the total power supply and then wait for 5 minutes before starting.
⑸ check emergency button is reset.

Head poor discharge or blocked
1, causes:
⑴ heater section does not work, plastic material poor.
⑵ set the operating temperature is low, or plastic wide molecular weight distribution, unstable.
⑶ may not be easily melted foreign body.
2, approach:
⑴ check the heater, if necessary, replace.
⑵ verify the set temperature, and if necessary, consult with the technician to increase the temperature set point.
⑶ cleaning inspection squeeze system and the nose.

The main electric current is too high
1, causes:
⑴ lack of heating time, torque.
⑵ some of the heater does not work.
2, approach:
⑴ car drive handcart, if not easy, then extend the heating time or check the heater is working properly.
The main motor makes an abnormal sound
1, causes:
⑴ main motor bearing damage.
⑵ main SCR rectifier circuit in a SCR damaged.
2, approach:
⑴ replace the main motor bearings.
⑵ check the SCR rectifier circuit, if necessary, replace the SCR