Introduction to common faults of plastic processing equipment

With the continuous progress of the times, plastic processing equipment is widely used in all walks of life and plays an extremely important role in our daily life. When we use the equipment, we often encounter various plastic processing faults. Only by mastering the correct operation mode can we quickly solve the problems and resume production as soon as possible. This article will take you to see the common faults and treatment methods of plastic processing equipment.

1、 The torque of main motor of plastic processing equipment is too low

Cause analysis: the failure of the feeding system will cause the idle running of the twin-screw, which will lead to the low torque of the main motor.

Solution: check and judge whether the additive system or main material blanking system is faulty, and clean up the blocking points.

2、 Friction clutch failure of plastic processing equipment

Cause analysis: the instantaneous starting voltage of the main motor is too low, the friction disc and friction plate are overheated, the friction disc and friction plate are aging, and the air pressure of the friction disc is too low, which can lead to the clutch disengagement.

Solution: when starting the main motor of plastic processing equipment, avoid the peak power consumption, reduce the feeding load, and the restart interval shall be at least 30 minutes; In summer, when the main motor is started repeatedly for more than two times, the interval shall be extended or the fan shall be used for forced cooling. Purge with instrument air and wipe the dust on the surface of friction plate and friction disc with rag. If the wear is heavy or the surface is “vitrified”, replace the friction plate and friction disc. Confirm whether the air pressure value can make the friction disc fit with the friction plate.

• High melt pressure of plastic processing equipment

Cause analysis: high mesh number of filter screen, low melt index of polypropylene powder and large feeding volume, incomplete melting of materials due to low barrel temperature in each section, low opening rate of template and blocked extrusion of materials at the head can lead to high melt pressure.

Solution: when plastic processing equipment produces low melt index products, low mesh filter screen shall be used, and the opening of throttle valve shall be increased to reduce back pressure; Change the filter screen in time, monitor the quality of various additives and the ash content in polypropylene powder. Reduce the feeding load. Without affecting the quality of extruded products, increase the barrel temperature of each section, increase the polypropylene melt temperature and increase the material fluidity. After the extruder is stopped, raise the head temperature and keep it constant for a period of time, and then wash and clean the formwork thoroughly.

The common faults and solutions of plastic processing equipment will be shared here first, and we will continue to update them for you later. I hope the content shared today can help you better maintain the processing equipment. If you want to know more about this wonderful information, please visit our official website at any time.