What are the common faults of kneading machines?

1. Electrical faults:
1. The motor does not rotate:
Check the power cord, plug, and socket: Check if there is any damage, and replace them in time if there is any damage.
Check the band switch or rheostat: Confirm whether it is damaged or the connection is disconnected. If it is damaged, replace it, and if it is disconnected, re-weld the connection.
Check the motor magnetic field coil: Check if there is a break or circuit break (inside). If the connection coil is disconnected, it can be re-welded, and if it is internally disconnected, the coil needs to be rewound.
2. The motor speed does not reach the rated speed:
Check the bearing: If the bearing is damaged, replace it; if there is no oil or too much dirt inside the bearing, clean the bearing and add grease.
Check the commutator surface and the coordination between the brush and the commutator: If there is an abnormality on the commutator surface, such as oxides, use fine sandpaper to polish; if the commutator and the brush do not match, adjust them to a good contact state.
Check the rotor coil: If there is a short circuit, the coil needs to be rewound.
2. Hydraulic failure:
1. Hydraulic oil leakage:
Check the seals: Check whether the seals are aged or damaged. If there are any problems, replace them in time.
Check the pipeline connection: Make sure the pipeline connection is firm, without looseness or leakage.
2. Slow operation or failure:
Exhaust the air in the system: Check whether there is air entering the hydraulic system. If so, exhaust the air.
Clean the hydraulic pump: If the hydraulic pump is blocked, disassemble and clean the hydraulic pump to remove impurities and dirt.
Replace the damaged hydraulic valve: If the hydraulic valve fails, such as the valve core stuck, the spring fails, etc., a new hydraulic valve needs to be replaced.
3. Mechanical failure:
1. Severe vibration and loud noise:
Check whether it is balanced: If there is an imbalance problem, adjust it.
Check the fixing nut: The nut that fixes the machine is loose and needs to be tightened.
Check the bearing: If the bearing is damaged or bent, the bearing should be replaced.
Check the machine cover: The cover is deformed or the position is incorrect and friction occurs, and it needs to be adjusted.
2. The machine cannot run:
Check the transmission parts: such as belts, chains, couplings, etc., whether they are loose, broken or worn. If there is any problem, replace or adjust them in time.
Check the stirring paddle: whether the stirring paddle is stuck by foreign objects, or the gap between the paddle and the inner wall of the container is too small to cause friction, clean up the foreign objects or adjust the gap.
Check the bearing: the bearing is damaged or stuck, and the bearing needs to be replaced.
IV. Overtemperature failure:
1. The internal temperature of the machine rises:
Check the lubrication system: clean the lubrication system regularly and replace the lubricant.
Check the cooling system: whether the cooling system is working properly, such as whether the cooling fan is rotating, whether the cooling water pipe is blocked, etc., and repair or clean it in time.
Adjust the workload: avoid long-term continuous high-load operation.
2. The oil temperature rises:
Check the hydraulic oil level: if the oil level is too low, add hydraulic oil in time.
Check the hydraulic oil radiator: if the radiator is blocked or the heat dissipation is poor, clean or repair it.
Check the working pressure of the hydraulic system: if the pressure is too high, adjust the pressure components such as the overflow valve to reduce the working pressure.
5. Other faults:
1. Unsatisfactory kneading effect:
Check the speed and direction of the stirring paddle: whether the speed meets the process requirements, whether the direction is correct, adjust the speed or change the direction.
Check the shape and size of the stirring paddle: the blade is severely worn or the shape is inappropriate, affecting the kneading effect, replace the stirring paddle.
Adjust the material formula and feeding sequence: optimize the material formula and feeding sequence according to the actual situation.
2. Material leakage:
Check the sealing device: such as packing seal, mechanical seal, etc., whether it is damaged or aged, and replace the seal in time.
Check the welds and joints of the container: whether there are cracks or looseness, and perform repair welding or tightening.
Adjust the gap between the stirring paddle and the inner wall of the container: if the gap is too large, the material is easy to leak, adjust the gap to the appropriate range.