Wuhan Handern Twin Screw Extruder
DATE：2020/4/30 8:50:30 / READ： / SOURCE：This station
Wuhan Handern Twin Screw Extruder
1. Overview www.handern.com Laminating compound equipment
The twin-screw extruder is essentially a forward pump device, which is significantly different from the structure and operation of the single-screw extruder, and is mainly manifested in the following two aspects.
First, the material conveying of the single screw extruder is drag-induced, which is friction dragging in the solid conveying section and viscous dragging in the melt conveying section. Therefore, the conveying efficiency depends on the friction performance of the solid material and the viscosity of the melt material; the conveying of the material of the meshing twin-screw extruder is forward displacement, and the degree of positive displacement depends on the screw edge of one screw and The closeness of the screw groove of the screw. Therefore, the material in the tightly engaged counter-rotating screw can obtain the maximum positive displacement.
Second, in single-screw extruders, the velocity distribution of the plastic melt is relatively simple; in twin-screw extruders, the velocity distribution of the plastic melt is quite complicated. www.handern.com Laminating compound equipment
Therefore, the twin-screw extruder has its unique properties, so that the twin-screw extruder has many different types, different structures and operating modes. Compared with single-screw extruders, twin-screw extruders have the following characteristics in plastic molding. www.handern.com Laminating compound equipment
Feeding is easy in single-screw extruders. The transportation of plastics is effected by friction. Therefore, if the plastic is powder, or a mixture composed of fillers such as glass fibers is added to the plastics, these materials are The conveying efficiency in is quite low. In the twin-screw extruder, the plastic is transported on the principle of positive displacement, and there can be no pressure return, so no matter what kind of material, it is easy to add. Many manufacturers now use twin-screw extruders to directly produce PVC powder as products, eliminating a granulation process. www.handern.com Laminating compound equipment
Author：admin