Plastic extrusion machine is a kind of common plastic machinery and equipment, process in the day-to-day operation of the extruder, extrusion the opportunity to appear all kinds of fault, affect the normal production of plastic machinery, we have the following analysis of extrusion machine fault.
Host current instability
1, the production of reasons: the uneven feeding. The main motor bearing damage or bad lubrication. By a heater failure, without heating. The screw adjusting pad is not right, or wrong phase, element interference.
2, treatment methods:
Inspection of feeding machine, troubleshooting. The main motor maintenance, replacement of bearings when necessary. The inspection of the heater is working properly, if necessary, replace the heater. The check and adjust the pad, pull out the screw screw without interference check.
Main motor can not start
1 reasons: first, drive program is wrong. The main motor thread has a problem, the fuse is burnt. The interlocking device associated with the main motor function
2, treatment methods:
Inspection procedures, in the correct order to drive drive. Check the main motor circuit. Check the lube oil pump is started, check the chain device associated with the main motor state. The pump is not open, can not open the inverter induction motor without end, turn off the power supply for 5 minutes after the restart. Check whether the emergency reset button.
The head is out of order or blocked
1 reasons: firstly, a heater does not work, plasticizing bad. The operation temperature is low, the molecular weight distribution of plastic or wide, unstable. We may have a foreign body is not easy to melt.
2 treatment methods: inspection, heater, replace if necessary. The verification of each set temperature, when necessary and technology consultation, improve the temperature setting value. The clean-up inspection system and extrusion die.
Main current is too high
1 reasons: firstly, the heating time is insufficient, large torque. A section of the heater does not work.
2, processing method: 1 hand turning applications when driving, such as not easy, prolonging heating time or check whether the normal work of the heaters.
Main motor abnormal sound
1 reasons: firstly, the main motor bearing damage. The damage of a SCR silicon controlled rectifier circuit of main motor.
2, processing method: the replacement of the main motor bearing. The inspection of the silicon controlled rectifier circuit, replace the thyristor when necessary.