Compound coating twin screw extruder
DATE：2021/4/28 8:30:08 / READ： / SOURCE：This station
Compound coating twin screw extruder
Composite coating production line www.handern.comTwin screw extruder has been more and more widely used in polymer processing and modification, and it is the most important equipment for engineering plastics modification. With the development of preparation technology
With the improvement of technology, there has been a new generation of high speed? High torque twin screw extruder, screw speed up to 60120? Compared with developed countries, double boom extruder is more popular in China
It began to be applied late, and only in the early 1980s did it begin to be introduced from abroad. With the deepening of the understanding of twin-screw extruder, in the 1980s
In the middle of the generation, the application and usage of twin-screw extruder in China are expanding. By introducing foreign technology, domestic manufacturers began to manufacture twin-screw extruder
Out of the machine. At the beginning of 1990s, the design and manufacture of twin-screw extruder developed rapidly in China, forming a twin-screw extruder to make heat
Instinct to meet the needs of domestic production.
On the whole, as an extruder, twin-screw extruder and single screw extruder are composed of main engine and conveyor. Composite coating production line
www.handern.com
① The main machine is similar to the single screw extruder. Its main function is to melt, mix, plasticize, fix quantity, pressure and temperature of polymer (and various additives) from the mouth
Die extrusion and then through the auxiliary machine to get semi-finished products (such as particles) or products. It consists of drive part (including drive motor, reducer, torque distributor and bearing package)
Extrusion part (mainly composed of screw, barrel and exhaust device), heating and cooling system, quantitative feeding system and control system.
② The auxiliary machine includes the head and the engine? Components of various auxiliary machines, such as cooling setting device, traction device and cutting device of pipe extrusion auxiliary machine; Pelletizing device of pelletizing auxiliary machine
Cooling device, particle conveying, drying and packaging device, etc. Composite coating production line www.handern.com
There are many kinds of twin-screw extruders, which can be classified from different angles, such as meshing or not, whether the two screw grooves in the hatching area are open or closed, and whether the two screw grooves are closed
Whether the rotation direction of the rod is in the same direction or different direction, whether the screw is cylindrical or dimensional, or whether the axes of the two screws are parallel or intersecting, etc.
(1) Non meshing and meshing Twin Screw Extruders
Non Intermeshing Twin screw extruder is also called external diameter contact or tangent twin screw extruder. Its two screws
The distance I between the axes is at least equal to the sum of the outer radii r of the two screws. That is 17R + R. Some people call this kind of twin-screw extruder double? Extruder
It is different from twin-screw extruder. Composite coating production line www.handern.com
The distance between the two screw axes of Intermeshing Twin screw extruder is less than the sum of the two screw outer radii R
Because the screw edge of the root screw is inserted into the screw of the other screw, it is called pharyngeal type. According to the degree of meshing, it can be divided into full meshing type, partial meshing type and non meshing type
Completely coincident. The so-called full mouth type refers to the connection between the top of one screw and the other screw? There is no gap between the root of the screw groove of the root screw（ In terms of design,
Non manufacturing assembly), i.e. I = R + R（ Where R is the root radius of the screw), and the so-called partially flat or incomplete plastic fitting refers to the connection between the top of the screw floor and the other side of the screw-
There is a gap (or channel) between the root of screw groove. Composite coating production line www.handern.com
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