Sawdust granulator is sometimes called biomass granulator, because people use various biomass as raw materials. In addition, the granulator is also widely called rice husk granulator, bark granulator, etc. according to the different raw materials. . From these names, we can see that the raw materials of the pellet machine have a wide range of applications, which are widely used in biomass materials such as sawdust, various wood chips, various straws, rice husks, peanut shells, branches, and bark.

The difference is the compression ratio of the pellet machine mold. It is only necessary to adjust the compression ratio of the sawdust pellet machine mold to be suitable for different raw materials. It should be noted that the compression ratio of a pellet machine mold can only be applied to one kind of raw material. If the raw material is replaced, then the compression ratio of the pellet machine mold than to replace.

Simply put, a pellet machine mold is equipped with a compression ratio, which is suitable for a kind of raw material. If the raw material is replaced, the mold can be replaced!

The sawdust granulator has certain requirements for raw materials in the granulation process, the most important being the size and moisture requirements of the raw materials.

If the size of the raw material is relatively large, it must be pulverized first. The general pulverizer can pulverize the raw material to two millimeters, which can meet the size requirements of the granulator.

The requirements of the pellet machine for the moisture of the raw materials are also very important, and the moisture should be controlled at about 18%. If the moisture is too high, the compression will not be formed, and if the moisture is too small, the powder will be too much or the particles will be very short.

Therefore, the moisture content of the raw materials in the production process of the sawdust pellet machine should be well controlled.

Various problems with molding pellets:

1. Sawdust particles produce vertical cracks

In the production process of some customers, due to the type of dryer selected, the wood chips cannot be dried evenly, resulting in uneven moisture content of the raw wood chips. It is elastic and single open, resulting in vertical cracks.

2. The pellets are bent and there are many cracks on the surface

This phenomenon of sawdust pellet machine usually occurs when the pellets leave the ring die. In production, when the cutter position is adjusted far from the surface of the ring die and the blade edge is blunt, the pellets are easy to be cut by the cutter when they are extruded from the die hole. Broken or torn rather than cut, with some of the wood pellets bent to one side and many cracks on the other. During the process of entering the cooler for cooling or transportation, the particles tend to break from these cracks, resulting in the production of too much powder or too short particles.

3. The particle produces radiation cracks from the source point

The main reason for this situation is that the wood chips contain relatively large wood chips. Raw materials with similar fiber degrees will be squeezed and fused with each other during granulation. If there are larger fibers, the interaction between fibers will be affected. It is not as easy to soften as other finer raw materials, and during cooling, due to the different degree of softening, the difference in shrinkage is caused, resulting in radiation cracks.
As long as you do a good job in the premise market survey, buy high-quality products and choose a good pellet machine manufacturer, the chances of the above problems will be reduced.