Features and Application
The machine is mainly used in extruding soft and hard thermoplastics,such as polyvinyl chlorid(PVC)and polystyrene(PE).Coordinated with the appropriate auxiliary machine(including the head of former),it can produce many kinds of plastic products such as film,pipe,board,braid,belt as well as granule.
A conical twin-screw extruder is a specialized machine widely used in the plastics and PVC processing industry. Unlike a parallel twin-screw extruder, its two screws are arranged in a conical shape – wider at the feeding section and narrower at the discharge end.
Key advantages:
Efficient plasticizing – The gradually decreasing screw volume ensures excellent melting and homogenization of materials, especially for heat‑sensitive compounds like PVC.
High torque & stability – The conical design provides a larger feeding area and strong conveying capacity, resulting in stable output and consistent quality.
Low shear & less degradation – Gentle processing minimizes material overheating, making it ideal for profile, pipe, and sheet extrusion.
Typical applications:
PVC pipes, profiles, window frames, and siding
Wood‑plastic composites (WPC)
Pelletizing of rigid and flexible PVC compounds
In short, the conical twin-screw extruder offers reliable performance, energy efficiency, and excellent melt quality – a trusted workhorse for PVC processing lines.
Main Technical Parameter
| Model | SJSZ45 | SJSZ51 | SJSZ55 | SJSZ65 | SJSZ80 | SJSZ92 |
|---|---|---|---|---|---|---|
| Screw（mm） | 45/90 | 51/105 | 55/110 | 65/132 | 80/156 | 92/188 |
| Speed（rpm） | 1-45 | 1-45.5 | 1-40 | 1-38 | 1-36.9 | 1-34.7 |
| Effective Length of screw（mm） | 1070 | 1100 | 1200 | 1440 | 1800 | 2500 |
| Motor Power（kw） | 15 | 18.5 | 22 | 37 | 55 | 110 |
| Barrel heating power（kw） | 9.6 | 11.5 | 18 | 24 | 36 | 88 |
| Capacity（kg/h） | 70 | 80 | 150 | 250 | 360 | 600 |
| Height（mm） | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 |
| Weight（kg） | 2800 | 3000 | 3500 | 4000 | 5000 | 5500 |
| Dimensions（mm） | 3300*1200*2000 | 3360*1290*2100 | 3620*1350*2200 | 4235*1520*2450 | 4750*1550*2460 | 6000*1600*2500 |
Final Product Application
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Features and Application
The machine is mainly used in extruding soft and hard thermoplastics,such as polyvinyl chlorid(PVC)and polystyrene(PE).Coordinated with the appropriate auxiliary machine(including the head of former),it can produce many kinds of plastic products such as film,pipe,board,braid,belt as well as granule.
A single‑screw extruder is one of the most common and versatile machines in the plastics industry. It consists of a rotating screw inside a heated barrel. The screw transports, melts, and pressurizes the material, which is then forced through a die to form continuous shapes.
Key features:
Simple design – easy to operate and maintain
Reliable performance – suitable for a wide range of thermoplastics
Cost‑effective – lower initial investment compared to twin‑screw extruders
Typical applications:
Pipes and tubes (PE, PP, PVC)
Profiles, sheets, and films
Filaments, strands, and compounding
While twin‑screw extruders offer better mixing, the single‑screw extruder remains the workhorse for general extrusion due to its simplicity and efficiency.
Main Technical Parameter
| Model | Diameter of screw（mm） | L:d（mm） | Power（kw） | Capacity（kg/h） |
|---|---|---|---|---|
| SJ30×25 | 30 | 25:1 | 1.5 | 1-5 |
| SJ45×25 | 45 | 25:1 | 7.5 | 10-30 |
| SJ65×25 | 65 | 25:1 | 22 | 30-80 |
| SJ65×30 | 65 | 30:1 | 30 | 50-100 |
| SJ65×33 | 65 | 33:1 | 45 | 70-150 |
| SJ90×25 | 90 | 25:1 | 45 | 80-150 |
| SJ90×33 | 90 | 33:1 | 90 | 100-200 |
| SJ120×25 | 120 | 25:1 | 90 | 100-250 |
| SJ120×30 | 120 | 30:1 | 110 | 100-300 |
| SJ150×25 | 150 | 25:1 | 132 | 200-400 |
| SJ200×25 | 200 | 25:1 | 160 | 300-500 |
Final Product Application
