2025-08-06 16:21:31 hits:26

Daily Maintenance of Biomass Pellet Mills (Flat Die): Three Key Maintenance Points

Press Roller Maintenance: Ensuring Uniform Compaction

The press rollers of a flat die pellet mill act perpendicularly on the horizontal die. Maintenance focuses on pressure balance and wear control:

Pressure Balance Adjustment: When commissioning a new machine, adjust the press roller height simultaneously to ensure consistent clearance with the flat die and avoid unilateral overload.

Severely worn press rollers require prompt replacement to prevent damage to the die, bearings, and other critical components.

Residue Cleaning: After daily shutdown, scrape away carbonized material embedded in the press roller grooves. Hard residue accelerates die wear.

Die (Flat Die) Maintenance: Protecting Surface Accuracy

The horizontal placement of flat dies makes them more susceptible to uneven wear. Maintenance should focus on flatness and hole maintenance:

Hole Blockage Prevention: Before shutting down the machine, inject oil into the die holes to seal and prevent rust. Clear blocked holes with a vertical drill; avoid drilling at an angle to damage the chamfer.

Compression Ratio Adaptation: Select die hole taper based on the raw material: use a trumpet hole for wood chips, and a secondary molded hole for straw to reduce fiber entanglement.

Automatic Lubrication System Maintenance: The Core of Intelligent Maintenance

The standard centralized lubrication system on flat die machines significantly reduces labor intensity, but requires regular maintenance:

Oil Line Inspection: Before starting the machine daily, check that the indicator levers of each diverter valve are actuated. Blockage in the oil lines can cause the roller bearings to starve of oil and burn.

Technical Expert Tip: When maintaining a flat die machine, adhere to the "Three No's" principle: Do not start the machine if the rollers are not level, do not operate until the lubrication alarm is cleared, and do not feed material if the die is blocked. 

Conclusion

The structural characteristics of a flat die pellet mill dictate that its maintenance focuses on ensuring plane precision and optimizing intelligent lubrication. This requires careful attention to three key areas: balanced roller pressure, die deformation prevention, and precise control of the lubrication system.