Some advantages and functions of three screw pelletizer in application

The three screw pelletizer has better shunting effect and more times of shearing, so it has better distribution mixing and dispersion mixing. When the high concentration PE carbon black masterbatch is produced, because of the high fineness of carbon black particles and poor compatibility with the carrier resin during mixing and granulation, the agglomeration can be produced because the particle size is small, so that the carbon black particles are dispersed inhomogeneous in the resin and influence the quality. The triangle three screw has three meshing areas, which is equivalent to three pairs of twin-screw. The shearing times of the material are twice higher than that of the twin screw. The mixing effect of the same screw is 3 times of the twin screw, and the components are easily homogenized and microparticle, and the material is in the space of many layers. Full exchange of flow to achieve good plasticizing and dispersing effect, and can achieve 55% high filling ratio, feeding and transportation is also very stable; in addition, it has good self cleaning, avoid material dead angle, make the production of product performance uniform. The three screw granulator can achieve the same even better mixing and dispersing effect with the twin screw extruder with the smaller length to diameter ratio, which not only improves the material quality, simplifies the production process and reduces the cost, but also is the ideal choice for the masterbatch manufacturer to produce high performance and high quality products.

The three screw pelletizer has a larger exhaust interface area, which is more conducive to exhaust operation and minimize the impact of exhaust on production. Using a type of three screw to produce this masterbatch, even without vacuum, the volatiles can be removed smoothly, two exhaust ports have no expansion, and the color and shape of the particles are uniform, which proves that the volatiles are fully removed. This is because its three screw is arranged in one word, and the two meshing area is equivalent to two twin-screw. The material is carefully shunted and the exposed area of the three screw surface is increased, that is, the surface update effect is increased, almost 2 times of the twin screw, so the small molecules inside the material are easier to remove clean and achieve good. The exhaust effect makes the produced pellets have higher appearance quality and physical and mechanical properties, and also reduces the influence of exhaust on production.

The three screw pelletizer has a wider residence time range, and is more conducive to the processing technology with short detention time and long detention time. The process to reduce the molecular weight of the crosslinked PE is that the long carbon chain of the crosslinked PE is required to degrade as completely as possible into small molecular material with narrow molecular weight distribution. The one character type three screw can achieve better plasticizing and mixing effect as long as the length to diameter ratio is about 36:1. The three screw is used for strong shearing and excellent self cleaning properties, so that the material is in the material. The repeated exchange flow between the screws will not appear in the twin screw, which will not appear in the twin screw. Because the speed of the main engine is too fast, the retention time in the cylinder is short, and it is not fully plasticized. The retention time is prolonged, the range of the crosslinked PE molecular chain is reduced, and the three screw is the reaction temperature and screw. Speed control is more precise than twin screw, which is very beneficial to extrusion. When the grafting reaction of PE is extruded, the material is required to stay in the cylinder for as long as possible, and the amount of initiator is limited. This requires that the dispersing of the initiator must be evenly distributed in the system so that the graft can be grafted to the resin as well as possible under the action of the initiator, and the use of the twin screw is often used. The high shear of the rotational speed is obvious. In the preparation of PET, PBT and other engineering plastics and PC/PBT and other alloy materials, the small length diameter ratio of a type three screw is used to make the retention time of the material as short as possible, in order to avoid the thermal decomposition of its ester bond, and its uniform and effective shearing can also achieve excellent plasticizing effect. The triangular three screw has more advantages in this aspect, and the required ratio of length to diameter is smaller, and the effect of shearing dispersion is better.

The three screw granulator has lower energy consumption. The increase of the output of the three screw is larger than that of the twin-screw, the positive displacement capacity is strong, the length and diameter ratio is short, the length of the screw is only 1/2 of the conventional twin screw. The energy consumption is very significant, the free flow space of the material in the barrel is increased, and the torque of the screw is reduced and the energy consumption is reduced. Moreover, the length and diameter ratio of the three screw is short, the machine is small, the occupancy space is small, and the consumption of water, electricity and other energy is much smaller than that of the general twin screw extruder.

The above is the function introduction of some three screw pelletizer. He improves the performance of the granulator better on the basis of the twin screw granulator. I believe that in the near future, there will be more high-performance machines.