The solid molding of the sawdust pellet machine is to prevent the raw material from rebounding back to the original shape so that it can maintain a certain style and strength. The compression process does not need to add any binder. It refers to the physical molding of fiber materials, from straw, wood chips, and other biomass. In terms of combination, it is mainly composed of cellulose, hemicellulose, lignocellulosic, and its resin, wax, and other components.

Among the various components that make up biomass, lignocellulose is widely considered to be the best intrinsic binder in living organisms. At room temperature, the key part of lignocellulose is insoluble in all organic solvents, but lignocellulose is amorphous and has no melting point but a softening point.

When the temperature exceeds 70°C to about 110°C, it becomes soft and the adhesive force starts to increase. At this time, a certain pressure is applied to the outside world, which can make it closely bond with cellulose, hemicellulose, etc. After the sawdust pellet machine briquette fuel is cooled and cooled, the strength increases, and the rod-shaped, small block, and granular biomass solid briquette fuel with burning characteristics similar to wood can be obtained.