[[TitleIndustry]]

Common fault solutions for second-hand double screw parallel rod extruders

Date:Aug 12, 2020

1. The main motor of the second-hand double screw parallel rod extruder cannot start

Solution: Check the program and restart according to the correct drive sequence. Check the main motor circuit. Check whether the lubricating oil pump is started, check that the induction current of the inverter related to the main motor has not been discharged, turn off the main power supply and wait for 5 minutes before starting. Check if the emergency button is reset.

2. The main motor of the second-hand double-pitch parallel rod extruder makes an abnormal sound

Solution: Replace the main motor bearing. Check the SCR rectifier circuit, and replace the SCR components if necessary. Cause: The main motor bearing is damaged.

Third, the current of the main machine of the second-hand double-pitch parallel rod extruder is unstable

Causes: uneven feeding, damaged or poor lubrication of the main motor bearings, a certain section of inverter failure, no heating, wrong screw adjustment pad, or wrong phase, component displacement. Treatment method: check the feeder and troubleshoot. Check the main motor and replace the bearings if necessary. Check whether each inverter is working normally, and replace the heater if necessary. Check the adjustment pad and pull out the screw to check if there is any interference in the screw.

Fourth, the main motor bearing temperature rise of the second-hand double-pitch parallel rod extruder is too high

Cause: Poor bearing lubrication. The bearings are severely worn.

Treatment method: check and add hydraulic pressure. Check the motor bearings and replace if necessary.


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