Ring die bore structure: ring die bore the main straight holes, tapered bore, tapered bore and with pressure inside the hole and so on. Depending on the biomass feedstock, using the hole in the form of different types of mold. Compression ratio is a reflection of the strength of particles as an indicator of the extrusion, i.e. the ratio of the effective thickness of the ring die and the die hole diameter (l / d), a ring die compression ratio is small, the effective length of the die hole is shorter, the material in the die 孔中成 type pressure is small, easy extrusion ring mold Buying biomass pellet machine, although high yield, but made out of loose pellets, the appearance is not smooth; the effective length of the ring mold compression ratio, the die hole length, suffered material in the mold hole The higher the pressure, the higher particle density corresponding to come out of the particles is smooth and good quality, but the particle machine production will decline, the system will be a corresponding increase in material costs. Guide cone material role is to facilitate the material into the mold hole course guide cone material easy to wear, the material must guide cone timely repair. Outer cone ring mold is mainly used straw, wood chips and other biomass feedstocks granulation. When the die hole diameter d by the wear becomes large, the length l of the die orifice will also be longer, so that the compression ratio is relatively stable, to ensure the hardness of the particles. Ring die bore by an equilateral triangle arrangement. Ring die opening ratio d2 / 4 (d + 6) 2. The higher the value, the more the material, but will reduce the strength of the ring mold, easy to crack; the lower the value, the greater the distance between the die orifice 6, the greater the intensity of the ring mold, the material less. So ordered biomass pellet machine, be sure to determine the size of the opening rate according to the intensity. For straw, wood chips and other materials, opening rate than the feed ring mold ring mold smaller biomass pellet machine purchase to ensure that the ring mold with good strength to prevent cracking of the ring mold. Die hole roughness is an important factor affecting the particles forming. Under the same conditions the compression ratio, the more difficult the die hole out of the coarser particles, too coarse particles also affect the surface quality, suitable roughness values ??should be between 0.8 and 1.6. Surface-hardened alloy steel ring die easily worn away the hardened layer, resulting in reduced service life. Now ring mold manufacturing production in general, after the heat treatment plus a fine reaming process, increase ring mold finish to guarantee a ring mold the material. According to the basic principles of biomass briquetting biomass pellet mill, biomass in the molding process of the type, size and moisture content of the raw material has certain requirements. Different extrusion methods the pellet mill feed requirements are different, is the core of extruded biomass curing technology, there is formed a continuous extrusion and intermittent extrusion methods. But still the most used single screw extrusion machine extrusion particles in biomass curing process, which is characterized by a density briquette, good surface quality and high efficiency. In this way the molding material + water content has a significant impact on the molding, the moisture content is too low, the lignin softening temperature, the temperature is too high, the raw material during the extrusion process is easy on fire; softening temperature increases with decrease of moisture content However, the moisture content is too high, after the extrusion process of vaporization of water will affect the shape, ranging from the rod-like material surface cracks, while generating commonly known as "shooting" phenomenon, disruption of normal shape. In addition, biomass lignin component to be heated in order to reach its softening point and cellulose material cemented to each other. Thus, the particles in the extrusion molding machine in the process must be heated. Biomass curing process is as follows: raw materials → pretreatment (chipping or grinding) → drying → heating → molding, production and sales of new energy workers margin straw pellet machine, wood pellet machine is pressed biomass pellet fuel good choice . Buy biomass pellet machine, Huaihua biomass pellet machine sales price, the grand simple and efficient by Zhengzhou City grand Machinery Manufacturing Company Limited. Zhengzhou City grand Machinery Manufacturing Co., Ltd. (www.sdfensuiji.com) strong, credible, in Zhengzhou crushing grinding equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the grand machinery and you hand into the brilliant, for a better future!