Single screw extruder and twin screw extruder have their own characteristics and applications. In some applications, you can choose either single screw or twin screw.

Extruder can be used in plastics industry, food & Pet food industry, chemicals industry, Pharmaceutical, Minerals and Nonwovens industry. This guide mainly introduces the plastic extruder.

Let’s introduce in detail what are the advantages and differences between single-screw and twin-screw extruders.

What's Single Screw Extruder

Single screw extruder means that there is only one screw in the extruder barrel.It is mainly composed of three parts: extrusion system, transmission system and heating and cooling system. Its basic structure is shown in Figure 

Qingdao cuishi single screw extruder with sj30 ,sj45 , sj50 , sj65,sj75, sj90 ,sj120 and sj150 single wall corrugated pipe line with different output 

It can match the meter control system and auto loader and drying system 

the photos are the sj75/38 single screw extruder with 600kg/h for pe pipe line 

Extrusion System

The main function of the extrusion system is to melt and plasticize the polymer material to form a uniform melt, and realize the transition from the glass state to the viscous fluid state.The extrusion system mainly includes feeding system, screw and barrel. It is the core part of the extruder, and the screw is the key core component of the extruder.

 Heating and Cooling System

The heating and cooling system of the extruder consists of a heating device and a cooling device, which is a necessary condition for the smooth operation of the extrusion process. The heating device and cooling device must ensure that the temperature conditions meet the process requirements.

Application of Single Screw Extruder

Single screw extruder is mainly used in:

Pipe extrusion: suitable for PP PP-R pipes, PE gas pipes, PEX cross-linked pipes, aluminum-plastic composite pipes, ABS pipes, PVC pipes, HDPE silicon core pipes and various co-extruded composite pipes.

Sheet and sheet extrusion: suitable for the extrusion of PVC, PET, PS, PP, PC and other profiles and sheets.

Profile extrusion: Adjusting the speed of the extruder and changing the structure of the extruder screw can be used to produce various plastic profiles such as PVC and polyolefins.

Modified compounding: It is suitable for compounding, modifying and enhancing compounding of various plastics.