Pellet machine in the process of use may encounter a variety of failures, understanding some basic troubleshooting methods to ensure production efficiency and product quality is essential. The following are some simple ways to eliminate the failure of the pellet machine compiled by TONY:
1. Raw materials cannot enter the granulation chamber
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Cause of failure: The modulator is blocked or the feed port is arched The feeder skein drive is faulty Feeder skewer blocked |
Elimination method: Clear the conditioner or feed port Check the feeder skein drive and troubleshoot Clean material from feeder winch. |
2. Raw materials enter the granulation chamber but no particles can be pressed out
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Cause of failure: Die plugging Too much moisture in raw materials Die roll gap is too large The feed scraper is badly worn Die roll wear is serious |
Elimination method: Remove feed from die holes Control moisture in feedstock and steam Re-adjust the die roll clearance Replace the scraper and die roll. |
3. The granulator machine cannot be started
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Cause of failure: There is accumulation in the pelletizing room Circuit problem The travel switch must not touch the brake disc or the lever on the door |
Elimination method: Clean up Check the circuit and troubleshoot Check the stroke switch. |
4. Noise, violent vibration
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Cause of failure: Bearing damaged Ring die roller wear is serious The gap between the ring die and the press roll is too small Foreign body in the conditioner or feeder The main shaft bearing is too loose |
Elimination method: Change bearing Change roll Adjust the gap between die rolls appropriately Clean up foreign matter Tighten the nut to reduce the clearance. |
5. Uneven particle quality
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Cause of failure: Steam pipe steam supply is insufficient or pressure varies The delivery of raw materials is unstable Deflector blade wear causes uneven feeding |
Elimination method: Check steam line Adjust feed speed Replace deflector blade scraper. |
6. The granulator stops working
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Cause of failure: Speed control instrument parameter setting is not reasonable Part or all of the V-belt is severely worn or broken Due to overload or impurities stuck between the press roll and the ring die, the spindle rotates and the travel switch falls off The pressure of the hoop is not enough, or the brake disc is stained with grease, so that the spindle rotates and the travel switch is removed Line fault |
Elimination method: Re-adjust the V-belt tension or check the pressure value on the pressure gauge of the hydraulic system and reset its pressure value if necessary (adjust carefully) Reset its parameters Install a new set of V-belts, you can't just replace part of it Reset the spindle and travel switch Reset hoop oil pressure or clean brake disc Check the wiring. |
7. The granulator is often blocked
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Cause of failure: Uneven distribution of deflection scraper wear material Roll wear Press roll jam Deflection scraper assembly position is incorrect High water content of raw materials |
Elimination method: Replace with a new deflection scraper Replace with a new press roller Check roll Reassemble the deflection scraper Lower water content. |
8. The temperature of the spindle head rises too high
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Cause of failure: The main shaft bearing clearance is too small |
Elimination method: Loosen the compression nut properly. |
9. The granulator is smoking
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Cause of failure: The wear of the scraper causes a hard material layer to form between the press roll and the rotor support plate Not enough V-belt tension The hard material is deposited between the support plates behind the roller to form a hard material layer |
Elimination method: Install the new scraper Tensioning the V-belt Remove hard material and lubricate main bearing until grease emerges from behind rear support plate. |
10. The sound of ticking is heard every turn of the granulator
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Cause of failure: There are metal impurities in the ring mold |
Elimination method: Check the inner surface of the ring mold and remove metal impurities. |
11. The output of pellet machine is insufficient, and the main motor is full load
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Cause of failure: Due to the addition of too much steam (only refers to the temperature, humidity especially sensitive materials) Because the ring die is too thick Due to the poor quality of the steam, the water content is high The material is not sufficiently conditioned The gap between the roller and the ring die is too large Excessive wear of rollers and ring dies Formulation is not good or crushing size is too large |
Elimination method: Less steam should be added The thickness of the ring die appropriate to the material should be used The gas supply system should be readjusted Increase the amount of steam added or extend the conditioning time Readjust clearance Replace the press roll and ring die Adjust the formulation or replace the screen with a small aperture |
12. The ring die breaks after wear to a certain extent
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Cause of failure: There are foreign bodies in the pressed film Too thin ring die was used There's something wrong with the fixing of the ring die |
Elimination method: Cleaning of materials should be improved Use thicker rings with stepped holes Check whether the ring die drive rim and fastening bolts are locked, and replace the drive rim if necessary. |
13. Roller bearing is easy to damage
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Cause of failure: Hard foreign bodies exist in the material The gap between the roller and the ring die is too large Improper grease was used Too little grease is added to the press roll Faulty bearing end caps and seals were used Used other manufacturers, poor quality roller bearings |
Elimination method: Improved material cleaning Properly adjust the gap between the roller and the ring die Use grease as prescribed Add sufficient grease as prescribed Replace bearing end caps and seals. |
The above methods can help you quickly diagnose and solve the common faults of the pellet machine to ensure the stable operation of the equipment and the improvement of production efficiency.