Wuhan Handern Granulation

DATE：2020/6/16 8:40:14 / READ： / SOURCE：This station

Wuhan Handern Granulation

      The kneaded PVC 1000 mix can be directly used for extrusion molding, such as making pipes, profiles, blown films and other final products. However, most dry blends have to go through plasticizing and granulation processes to make composite granules. The pellets mentioned here are all-melted pellets. There are five types of full-melt pellets, namely random pellets; cylindrical pellets; square pellets, hot-cut pellets, and frozen pellets. www.handern.com Breathable membrane equipment
      The most common are cylindrical pellets, square pellets, and hot-cut pellets. www.handern.com Breathable membrane equipment
     1. Cylindrical pellets
     Through the multi-day die, extruded round strips that are not bonded to each other and cut with a straight knife type pelletizer. Strips parallel to each other are guided by a clamping roller fixed on the bottom knife and cut into a uniform length with a rotating flying knife. Generally, one-step dipping in temperature-adjusted water can fully supply the hardness required for cutting. www.handern.com Breathable membrane equipment
     2. Hot cut pellets
     The production of cylindrical bead pellets by the method of hot-cut composites is very common in the field of polyolefins, and is particularly suitable for hard PVC pelletization in the PVC industry. www.handern.com Breathable membrane equipment
     The bead is formed by sweeping the surface of the template with a rotary knife when the composite material is extruded from the porous die. The length of the pellets can be changed by adjusting the extrusion rate and blade speed. The pelletizing needs to be done in the cooling medium to prevent the pellets from sticking to each other. Cooling can be done by airflow, water spray or even completely immersing the pelletizing mechanism in Yongzhong. Airflow and water cooling are mostly used. The advantage of this granulation method is that the size is uniform and no sieve analysis is required; the blade loss is extremely slow and the operation is noiseless: no long cooling groove is required; the floor space is small. The same pelletizer has different die expansion and different melt properties. The shape and size of the hot-cut pellets vary with the mixture used. www.handern.com Breathable membrane equipment
    3. Cube pellets
    In the composite pellets of different shapes, the proportion of square pellets is quite large. It adopts a double-roller blender or machine to form a continuous and smooth strip material, and then the strip material is added to the pelletizer and cut into square pellets. The pelletizer is equipped with a device that cuts the material in the longitudinal direction and uses it to cut east material. This method is difficult for very soft compounds. At present, the most common method for making blocks is to use a stepped pelletizer. Under normal circumstances, a small amount of fine powder and granules will be formed and should be removed. Because the solid strip material is more difficult to cool uniformly than the strip material, the cooling process is longer regardless of whether the water tank is used as a spray system. www.handern.com Breathable membrane equipment

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