Advantages and characteristics of single screw extruder

A single screw extruder consists of a screw rotating in a heated barrel. Because of its compact structure, easy manufacturing, high processing efficiency, and low price, it is widely used. It is the type of extruder with the most complete technology and the largest number of applications. Single-screw extruders are widely used in the extrusion of pipe fittings, plastic sheets, plates, and plastic profiles. Some modified engineering plastics are granulated. Single-screw extruders have evolved from the most basic spiral structure to vibration reduction. Screw block, vented screw, grooved screw barrel, nut barrel, building block structure and many other structural features. At the same time, because the single-screw extruder occupies a small space, it becomes Key application machinery and equipment in the field of thin films.

What are the advantages and characteristics of single screw extruder?
1. Low price: the single-screw extruder has compact structure and low price. Twin-screw extruders are more than twice as expensive as single-screw extruders. Some are higher, and the actual ones vary depending on the manufacturer and model specifications.
2. The formula is simple, the single-screw extruder process and secret recipe are relatively simple, while the twin-screw extruder process and secret recipe are more complicated.
3. Wide application coverage: single screw is suitable for melt extrusion of high polymers, suitable for extrusion processing of pellet feed, such as forming, film blowing machine, injection molding processing, etc., and the application of raw materials covers a wide range.
4. Facilitate maintenance: In terms of maintenance, a single screw is simpler than a twin screw, because the structure of a single screw is very simple, which is conducive to maintenance.
5. The basic principle of transportation: the transportation of single-screw extruder depends on the sliding friction formed between the raw material and the barrel
6. The speed distribution in the single-screw extruder is relatively established and easy to describe
The main applications of single screw extruders are in the following fields:
Applicable to PP-R pipes, PE natural gas pipes, PEX chemical cross-linked pipes, aluminum-plastic pipes, ABS pipes, PVC pipes, HDPE silicon core pipes and various co-extruded steel mesh skeletons; suitable for PVC, PET, PS, PP, PC, etc. Extrusion of aluminum profiles and wood, and extrusion of various other plastics such as tears, rods, etc.; adjusting the speed ratio of the extruder and changing the structure of the extrusion screw can be applied to the production of various PVCs such as PVC and isoprene rubber. Profiles.