Textbook ring die use and maintenance common sense

Because the ring die is a high-cost wearing part of the pellet machine, it is the most important link in the granulation process, and the use of the ring die to the extreme is an important link to improve output and quality and reduce costs for biomass pellet manufacturers and feed pellet manufacturers. Therefore, when using the ring die, you should ensure that the pellet machine is in good working condition, if the equipment is faulty or some parts are seriously worn, the parts should be repaired or replaced in time, and the ring die should be used normally, so that the pellet machine can quickly recover to good working condition. The following is the common sense of the use and maintenance of the ring die of the treasure shell finishing, I hope it will be helpful to you.

Common sense of ring die use and maintenance

Precautions for debugging of ring die installation machine: when the ring die is installed, it is necessary to standardize the operation, adjust the concentricity of the ring die and the spindle, the balance of the ring die, the gap between the silver pressing and the ring die, the angle of the feeding scraper, and the button force of each fastening bolt and the angle of the cutting knife are very important. For the model that adopts the hoop to hold the assembly tightly, it is positioned by the wear-resistant ring and fixed by the hoop, so the wear and tear of the hoop and other spare parts is very important, and the following parts of the pellet machine should be checked when installing the ring die:

1. There must be enough tightening force when the hoop is installed, otherwise it will cause the pellet machine to vibrate, reduce the production capacity, and seriously affect the service life of the ring die and the pellet machine. The ring die guide port is flattened or the ring die is cracked and broken, which increases the load of the bearings and gear shafts of the main shaft and empty shaft of the pellet machine, and accelerates the wear of transmission wheels and other parts.

2. Wear-resistant ring. The wear ring wear makes the ring die and the transmission wheel, that is, the hollow shaft not centered, that is, we often say that the concentricity of the ring die is not good, which will also make the pellet machine vibrate, reduce the production capacity, and seriously affect the service life of the ring die and the pellet machine.

3. a transmission key. After the transmission key is worn, there will be a rotation phenomenon when the ring die is running, which increases the wear of the wear-resistant ring and the hoop, so that the ring

The die keyway is broken or even cracked

4. a pressure roller. If the pressure roller is not installed, the pressure roller will have the phenomenon of edge channeling, and the working area of the die roll will be axial relative offset

5. Roller shaft and bushing at both ends. Before installing the pressure roller, the wear of the two ends of the roller shaft and the bushing should be checked, whether the roller spindle is loose, and the gap between the spindle and the eccentric shaft should not exceed 0.3mm, so as to ensure that the ring die pressure can be balanced and stable

6. Backlash mixing wheel and locking screw. The gap between the silver pressing and the ring die is adjusted and fixed by the gap adjusting wheel, such as the tooth groove of the gap adjusting wheel is worn, and the locking screw should be replaced in time when there is a slippage, so as to prevent the output from decreasing, increasing the current, and even blocking the machine due to the self-enlargement of the die roll gap in production

7. Feeding scraper. The wear of the feeding scraper or the non-standard installation will make the feeding of the pressing zone of the ring die and the pressure roller unevenFinally, the uneven wear of the working face of the ring die (uneven height) and the inconsistent amplification of the die hole lead to the decrease of granulation yield, the thickness of the granular material varies greatly, and even the life of the ring die is reduced. Therefore, it is necessary to check the wear and adjustment angle of the feeding scraper frequently, and replace it in time if it is found that the wear is serious.

8. Pellet machine spindle clearance, etc. The spindle clearance is too large: the gap is too large, so that the ring die has a runout and the pressure roller swing phenomenon during operation, which makes the die roll gap difficult to be constant, and the pressure in the extrusion zone is unstable, which affects the granulation efficiency and increases the chance of blocking the machine. Spindle clearance is too tight: too tight clearance will cause the spindle bearing to burn out, so when the spindle bearing is tightened, the machine should carefully observe whether the spindle is heating and other conditions occur.