Handern Seiko granulation
DATE：2021/1/21 8:42:30 / READ： / SOURCE：This station
Handern Seiko granulation
The kneaded PVC dry mixture can be directly used for extrusion molding, such as making pipe, profile, blow molding film and other drum end products. However, most of the dry mixtures have to go through the processes of plasticizing and granulating to make composite granules. The granular material here refers to Jinpei granular material. There are five forms of full culture granular materials, namely random cutting, cylindrical granular materials, block granular materials, hot cutting granular materials and frozen abrasive materials. The most common are solid columnar aggregate, block aggregate and hot cutting aggregate. Non woven production line www.handern.com1. Cylindrical granular material
Through the multi hole die to extrude one meter of round strips which are not bonded with each other, and then cut them with a straight knife granulator. The parallel strips are pulled by the clamping roller fixed on the bottom knife and cut into uniform length by the rotary flying knife. -Generally, the hardness required for cutting can be fully supplied by one-way impregnation in the temperature regulating aquatic environment.
2. Hot cutting granular material
It is very common in polyolefin field to produce cylindrical beads by hot compound method, which is especially suitable for hard PVC granulation in PVC industry.
When the composite material is extruded from the multi hole die, the bead is swept and cut along the die surface with a rotary knife. The cutting length can be changed by adjusting the extrusion speed and blade speed. Granulation should be carried out in the cooling medium to prevent the particles from sticking to each other. Cooling can be accomplished by air flow, water spray or even completely immersing the granulator in water. The advantages of this method are uniform size, no screening, very slow blade wear, no noise in operation, no long cooling tank and small floor area. In the same granulator, the shape and size of hot-cut beads vary with the mixture used because of the difference of die swell and melt elasticity. Non woven production line www.handern.com
3. Block aggregate
In different shapes of composite particles, the proportion of block particles is quite large. It uses double roll plastic mixer or zudi machine to make the composite material into continuous and flat strip material, and then the strip material is added to the pelletizer to cut into square particles. The pelletizer is equipped with the device for cutting the belt material in the most direction, which is not used to cut the material into bundles. It is difficult to deal with very soft compound by this method. At present, the method of making block spreading is to use step cotton cutter. Under normal circumstances, there will be a small number of fine moves and even rules in the front yard. Because the solid material is more difficult to cool evenly than the strip, the cooling process is equally long, whether using water or spray system. Non woven production line www.handern.com
It is suitable for the production of soft or semi-rigid polychloroethylene and the production line of rubber plastic blending modification. If the mixer and double roll tablet press of the extrusion proportioning production line are changed into extruders, they will become the common extrusion machines for thermoplastic material management. The distance between the willow gas extruder with two-stage screw and the feed port is about 60%. If the Butterfly Bar suddenly keeps stable, the pressure of the moving bar will be reduced, so that the volatiles will escape and quickly discharge from the gas table on the material cylinder. Part of the melted material enters the second section of the screw, the depth of the screw groove changes again, the material undergoes more shearing, and the die is completely melted and extruded out of the die.
Author：admin