Introduction:
Shanbao Machinery founded in 1989, is a large-scale professional manufacturer of feed machinery fittings, integrating production, sales, and service. The headquarter is located at the new zone of Meishan Industrial Park, Sichuan, China. We cover an area of 40000 sq.m with 3 plants for forging and casting,drilling, and fine turning. We’re the only dies manufacturer who has its own forging and casting factory in China, it means we can control the quality from the beginning.
We’re a professional feed spare designer and have 15 professional technicians, all of whom have more than 30 years of experience in production.
We have produced different roller shells for many famous machine, like Buhler, CPM, Andritz and some others. The Roller shell is another important accessory of the pellet mill. The roller and Dies work together to extrude the feed.
What are pellet mill rollers made of?
Different supplier have different raw material, and the quality is different. The common materials are: 40Cr, 20CrMn, GCr15
| | C% | Cr% | Mn% | category |
| 40Cr | 0.37~0.44 | 0.8~1.1 | 0.5~0.8 | Medium carbon alloy steel |
| 20CrMn | 0.37~0.44 | 0.8~1.1 | 0.5~0.8 | Low carbon alloy carburizing steel |
| GCr15 | 0.95 -1.05 | 1.4-1.6 | 0.25-0.45 | High carbon and high chromium bearing steel |
We can easily find our high carbon and high chromium bearing steel has a good hardness, and toughness in the blank. These characteristics will be enhanced after quenching and low-temperature tempering.
Maintenance Requirements for Pellet Mill Roller Shells
Pellet mills are essential for producing high-quality pellets, and the performance of these mills heavily depends on the condition of their roller shells. Proper maintenance is crucial to ensure optimal functionality and longevity. Below, we outline the key maintenance requirements for pellet mill roller shells to help you maximize their performance and lifespan.
Regular Inspection
Regular inspections are vital for identifying potential issues early on. Check the roller shells for signs of wear, including:
Pitting: Small depressions that can compromise surface integrity.
Cracking: Fractures that may lead to catastrophic failure if not addressed.
Uneven Surface Wear: This can disrupt the milling process and affect pellet quality.
Visual inspections can be supplemented by measuring the roller shell’s diameter against the manufacturer’s specifications to ensure they remain within acceptable limits.
Cleaning and Lubrication
Keeping roller shells clean is essential for optimal performance. Accumulated dust, feed material, and debris can lead to increased wear. Follow these steps:
Cleaning: Regularly wipe down the roller shells to remove any buildup.
Lubrication: Apply lubricant to roller bearings and other moving parts as per the manufacturer’s recommendations. Proper lubrication minimizes friction, reducing wear and enhancing efficiency.
Balancing and Alignment
Correct balancing and alignment of roller shells are crucial for smooth operation. To minimize vibrations and ensure even wear:
Check Alignment: Regularly inspect the roller shells for concentricity, coaxiality, and parallelism.
Adjustments: Make necessary adjustments to maintain proper alignment, which helps in extending the service life of the components.
Replacement
Monitoring the wear rate of roller shells is essential for maintaining performance. Replace roller shells when they:
Reach the end of their service life, as indicated by the manufacturer’s guidelines.
Fall outside the acceptable diameter range.
Timely replacement of worn roller shells prevents further damage to other components and ensures consistent pellet quality.
Rotation
To promote even wear and extend the service life of roller shells, rotate them periodically. This practice helps:
Distribute wear uniformly across the surface.
Maintain consistent product quality throughout the milling process.
Storage and Handling
Proper storage and handling are crucial when roller shells are not in use. Follow these guidelines to prevent damage:
Storage: Keep roller shells in a clean, dry environment to prevent corrosion.
Handling: Handle them with care to avoid scratches, dents, or surface imperfections that could lead to accelerated wear during operation.
Conclusion
By adhering to these maintenance requirements, you can significantly enhance the performance and longevity of your pellet mill roller shells. Regular inspections, proper cleaning and lubrication, careful balancing and alignment, timely replacements, periodic rotation, and thoughtful storage and handling are all key practices that contribute to the efficient operation of your pellet mill. Invest in the care of your roller shells to ensure optimal productivity and quality in your pellet production.
Enough workblanks:
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