The double-screw extruder is developed on the basis of the single-screw extruder. Due to its good feeding performance, mixing and plasticizing performance, exhaust performance, extrusion stability and other characteristics, it has been widely used in extrusion products. forming process.
The barrel of the double-screw extruder is basically similar in structure to the barrel of the single-screw extruder. From the perspective of the shape and structure, the barrel of the double-screw extruder is also divided into an integral barrel and a segmented barrel.
Integral barrels are currently used more frequently. For example, the barrels used in meshing counter-rotating double-screw extruders and conical double-screw extruders mostly use integral barrel structures.
Segmented combined barrels are used in large double-screw extruders. The use of this segmented combined barrel is to facilitate the machining of the barrel and save some more expensive alloy steel.
On the meshing co-rotating double-screw extruder, the structure of the barrel is mostly segmented, and the barrel is composed of several sections of equal length. Outlet vent or additive port.
The barrel of the dual-screw extruder is an important part of the extruder in the extrusion and compression molding system. The barrel of the dual-screw extruder cooperates with the screw, the barrel accommodates the screw, and the screw rotates in the barrel.
When the screw rotates and pushes the plastic to move forward in the barrel, the external heating of the dual-screw extruder barrel conducts heat to the plastic in the barrel, and the volume of the thread on the screw gradually shrinks, so that the plastic in the thread groove is squeezed. After the action of various forces such as pressing, turning and shearing, it is uniformly mixed and plasticized. As it moves to the front of the barrel, it gradually melts into a viscous fluid state, completing the plasticization of the plastic.
The normal cooperation between the barrel and the screw of the dual-screw extruder ensures the continuous extrusion of raw materials for the dual-screw extruder.
Nanjing KY Chemical Machinery Co., Ltd. is a technological innovation leader in the dual-screw extruder industry. Our company is currently the largest manufacturer of parallel co-rotating dual-screw extruders in China and even in Asia, with an annual output of 250-450 units. More than 8,000 extruder systems have been installed worldwide, covering the chemical, plastic, textile, food and pharmaceutical industries. Welcome to consult.
Tel: +86-25-52706155
E-mail: info@kymach.com
No.59 West Tianyuan Road, Jiangning, Nanjing, Jiangsu Province, China
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