Extrusion machine is a common plastic mechanical equipment. In the daily operation of the extrusion machine process, it will have a variety of faults, which will affect the normal production of plastic machinery. So what are the common faults of the extrusion machine and why?
Ⅰ. The current of the host is unstable
ⅰ. Uneven feeding.
ⅱ. Main motor bearing of extrusion machines such as sheet extrusion equipment damage or poor lubrication.
ⅲ. A section of the heater fails to heat.
ⅳ. Screw adjustment pad is not correct, or the phase is not correct.
Ⅱ. The main motor cannot be started
ⅰ. The driving procedure is wrong.
ⅱ. There is something wrong with the thread of the main motor. And check to see if the fuse is burned.
ⅲ. Interlocking devices related to the main motor don't work.
Ⅲ. The machine head output is not smooth or blocked
ⅰ. A section of the heater does not work, and the material is poorly plasticized.
ⅱ. The operating temperature is set low, or the molecular weight distribution of plastic is wide and unstable.
ⅲ. There may be foreign bodies that are not easy to melt.
Ⅳ. The main power startup current is too high
ⅰ. Insufficient heating time and large torque.
ⅱ. A section of the heater of extrusion machine such as plastic film extrusion machine does not work.
Ⅴ. The main motor makes abnormal sound
ⅰ. Main motor bearing damage.
ⅱ. A SCR in the SCR rectifier circuit of the main motor is damaged.
Ⅵ. The temperature rise of main motor bearing is too high
ⅰ. Poor bearing lubrication.
ⅱ. Bearing wear is serious.
Ⅶ. Unstable machine head pressure
ⅰ. The main motor speed of extrusion machine such as HDPE extrusion machine is not uniform.
ⅱ. The feeding motor speed is not uniform, and the feeding amount fluctuates.
Ⅷ. Low oil pressure
ⅰ. The pressure setting value of the pressure regulating valve of the lubricating oil system is too low.
ⅱ. Oil pump failure or suction pipe blockage.
Ⅸ. The speed of automatic network changing device is slow or ineffective
ⅰ. Low air pressure or oil pressure.
ⅱ. Cylinder (or hydraulic station) leakage (or oil leakage)
Ⅹ. The safety pin or key is cut off
ⅰ. Excessive torque of extrusion system.
ⅱ. The main motor and the input bearing are connected with different centers.