Wuhan Handern Twin Screw Extruder
DATE：2020/9/2 8:46:47 / READ： / SOURCE：This station
Wuhan Hyundai Twin Screw Extruder
Wuhan modern twin-screw extruder is developed on the basis of single-screw extruder. Therefore, compared with single-screw extruder, twin-screw extruder also has certain commonalities. This section focuses on the differences. www.handern.com Non-woven equipment
1. Overview www.handern.com non-woven equipment
The twin screw extruder is essentially a forward pump device, which is significantly different from the structure and operation of a single screw extruder, mainly in the following two aspects.
First, the material conveying of the single-screw extruder is drag-induced, with friction drag in the solid conveying section and viscous drag 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 in the intermeshing twin-screw extruder is positive displacement conveying, and the degree of positive displacement depends on the spiral edge of one screw and the other. The closeness of the screw grooves relative to each other. Therefore, the material in the tightly meshing counter-rotating screw can obtain the greatest positive displacement. www.handern.com Non-woven equipment
Second, in a single-screw extruder, the velocity distribution of the plastic melt is relatively simple; in a twin-screw extruder, the velocity distribution of the plastic melt is quite complicated. www.handern.com Non-woven equipment
Therefore, the twin-screw extruder has its unique performance, so that the twin-screw extruder has many different types, different structures and operating modes. Compared with single-screw extruder, twin-screw extruder has the following characteristics in plastic molding processing. www.handern.com Non-woven equipment
Feeding is easy in a single-screw extruder, and the transportation of plastics is based on friction. Therefore, if the plastic is powdered, or a mixture composed of glass fiber and other fillers is added to the plastic, these materials are in the single-screw extruder The conveying efficiency in is quite low. In the twin-screw extruder, the transportation of plastic is carried out by the principle of positive displacement, and there is no pressure to return. Therefore, no matter what kind of material, it is easy to add. Many manufacturers now use twin-screw extruders to directly produce PVC powder into products, eliminating a granulation process. www.handern.com Non-woven equipment
Author：admin