Mixer Malfunction and Troubleshooting -

Some Tips about Mixer Malfunction and Troubleshooting

If mixer stops suddenly while working, the outlet gate should be opened to remove the materials before the motor.

In case of material leakage at the output gate, the contacting condition of the housing and output gate should be checked. If the output gate has been firmly fixed, first the nuts should be loosen on both ends of the connecting lever. After that, the length of the connecting level should be adjusted properly. In case of the presence of an aged seal strip, the aged seal strip should be replaced by a new one.

The limit switch is at an incorrect position or the circuit is broken if the discharge gate is closed without giving out any signal. In this case, the position of the limit switch should be adjusted and the circuit should be checked.

Check any failure with regard to the cylinder and air supply system if the discharge mechanism cannot work normally. The pipe connection should comply with the relevant requirements.

If the loose bolts on the sealing cover have led to material leakage at the shaft ends, they should be screwed up tightly; if the aged sealing members are the cause of material leakage, replace aged sealing members on the required time. In case of insufficient space for sealing members’ replacement, first, the sprocket and bearing pedestal and then the sealing gland should be disassembled. At last, the sealing members are replaced.

In case of light friction noise during the machine operation, the rotor’s position should be properly readjusted.

Mixer Malfunction and Troubleshooting

Common problems	Causes	Solution
The gates are not closed properly.	The materials have stuck between the body and the door.Low length of jacks;Low air jacks;Jacks have not been designed properly;	The machine should be inspected each time and the materials should be scraped away.Longer jacks with proper length should be used. Air compressor pressure should not be less than 8 bars.A jack with greater diameter and bigger air inlet should be used.
Materials are not mixed properly.	Low number of blades;Low rotation number and time of blades;High volume of materials inside the mixer;There is a big difference between the materials sizes;	The number of blades should be increased such that they can cover all parts of the mixer;At least 3 minutes are required; The volume of materials inside the mixer should not be more than 2/3 mixer capacity;The size of all materials to be mixed should be homogenous to have a better mixture.
Abnormal sound is heard from mixer.	Check the gearbox;There is a technical problem with bolts and nuts; Broken ball bearings; Axis displacement and longitudinal movement of mixer’s shaft;	Check gearbox and replace it if necessary;The motor screws, gearboxes, and stud s should be firmly fixed.The axial movement should be eliminated by placing mediator rings.