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Methods to ensure smoothness of the balls produced by the ball-pressing machine

Time：Jun 08,2021

When transporting and using most powdered materials, they are typically compressed into shaped forms before further processing. The primary equipment used for this compression is the pelletizing machine. However, in actual production, issues such as unevenly smooth surfaces or rough edges often arise in the resulting pellets. So, how can these problems be addressed to ensure the pellets maintain a high level of smoothness? Here are several methods for your reference:

1. Regularly clean the roller ball socket

When processing materials with high moisture content that require binders, the high temperature and pressure conditions often cause powder from these materials to stick to the ball pits on the roller surface of the pelletizer. This can lead to rough surface defects in the resulting pellets or even result in hollow or "void" pellets during the forming process. Therefore, for materials of this type, it’s essential to regularly clean the roller surface of the pelletizer. The cleaning should be performed only after the machine has been completely shut down and disconnected from power. Use tools like soft brushes or flexible scrapers to carefully remove any residual material powder from the ball pits—but make sure not to use any corrosive cleaning agents; plain water is the best option for this task.

2. Adjust the ball socket center

Sometimes, the ball sockets on the two rollers of the pelletizer lack precise alignment. Even a slight misalignment can cause burrs on the pellets, while more severe misalignments may result in defective finished products—specifically, out-of-specification "misaligned" pellets. In such cases, it’s necessary to adjust both counter-rotating rollers by repositioning the bearings within the roller sockets, ensuring that the center points of the bearings align perfectly with the ball sockets on the rollers. This adjustment will prevent burring during pelletizing and, after fine-tuning, also eliminate issues like deformation or crumbling during transportation.

3. Reduce the gap between the rollers

When the gap between the counter-rotating rollers of the pellet press is too large, the material comes into contact with only a small area of the two rollers, leaving some particles unpressed. This results in pellets with rough, uneven edges. To address this issue, adjust the gap between the rollers carefully—ensure it’s not too narrow, as excessive tightness can cause the rollers to seize up, preventing them from rotating and significantly reducing the lifespan of the roller linings.

What factors affect the ball-forming quality of the pelletizer?

The ball press machine can help reduce industrial pollution and contribute to environmental protection.