How to Select Your Pellet Mill?
The types of the pellet mill
We all know that there are many different types and designs of pellet mill, and different types of pellet mill has different feature and operating principle. Among them, the main types of pellet mill are the flat die pellet mill and the ring die pellet mill.
Flat die pellet mill
Feature
The flat die pellet mill is simple in structure and has the wide processing range, like the hardwood, pinewood, peanut shell, and all the biomass raw material what we can find can be compressed into the pellet without any additive. Because of the automatic regulating function of the pressing wheel, the material will be not crowded, that can ensure the stability of molding.
Working principle
There are many holes on the flat die surface, when the material fall on the surface, the roller will begin to running, and the material will be pressed into the die holes, then the material will be compressed into the cylindrical object and come out from the bottom of the holes. After that, the cutter will cut the cylindrical object into the pellet.
Ring die pellet mill
Feature
The main feature of the ring die pellet mill is that, the high efficient and the low power consumption. The ring die and the all the line of the roller has the same speed, and there is not additional friction. All the pressure are used to make pellet, therefore, the rind die pellet mill has the higher efficient.
Working principle
The ring die pellet mill has two to four roller and driven roller , and the rind die is a cylinder with many holes. When the material be putted into the ring die pellet mill workplace, the rollers in the cylinder will press the material into the holes, and then, the material will be squeezed out from the cylinder, and the cutter will cut them into the cylindrical pellet.
How to select your pellet mill
- Type. Now, we know the main types of the pellet mill, they are ring die pellet mill and flat die pellet mill. The ring die pellet mill has high efficiency, and the finished pellet has high hardness. But, the manufacturing process of ring die pellet mill is complex, so the cost is higher than the flat die pellet mill. Contrary, the flat pellet mill is simple in the structure, and maintained convenient, but the efficiency is lower than the ring die pellet mill. Comparatively speaking, the ring die pellet mill is fit for the large and the middle plant, and the flat die pellet mill is fit for the small-sized producing.
- Appearance quality. The spray lacquer in the surface of the pellet mill should balance and fastness, and there is no leakage of paint. The part which used the stainless steel should has the smooth surface, and no knock against scratches.
- Flat die pellet mill should mainly check the cutter’s quality, and the ring die pellet mill should check the roller bracket and the roller’s fastening situation.
- Security checks. To avoid the foreign matters go into the ring die pellet mill to damage the machine, there is a security linkage device in on the main shaft. If the foreign matters enter the ring die, the resistance of main shaft will increase rapidly, and the safety cock will break off. Then, the convex side of the clutch will touch a shafting fork of the limit switch, and shut off the power supply of the main shaft motor, ensure the pellet mill can’t be damaged. So, when select the ring die pellet mill, you should check that if the convex side of the clutch can touch the shafting fork of the limit switch or not. If can’t touch then don’t buy it.
