Product Introduction
The SJ Series Single-Screw Extruder is a robust, energy-efficient solution engineered for continuous extrusion of PVC, PE, PP, ABS and other thermoplastics. Featuring a self-manufactured barrel, screw and gearbox, advanced involute gear drive, and precision-controlled heating zones, it delivers exceptional plasticization, low noise, and stable operation—ideal for pipes, profiles, films, wire insulation and granulation applications.
Applications
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Plastic Pipe & Profile Production: PVC water/drainage conduit, UPVC window frames, PE irrigation tubing
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Sheet & Film Extrusion: Packaging films, barrier sheets, agricultural mulch
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Granulation Lines: Post-consumer recycling, compounding masterbatch, polymer blending
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Wire & Cable Insulation: PE/PP jackets, multi-layer cable sheathing
| Model | SJ35/25 | SJ45/25 | SJ50/25 | SJ65/25 | SJ75/25 | SJ80/25 |
| Screw diameter(mm) | 35 | 45 | 50 | 65 | 75 | 80 |
| L/D | 25:1 | 25:1 | 25:1 | 25:1 | 25:1 | 25:1 |
| Transmission Power(KW) | 5.5 | 11 | 15 | 22 | 45 | 45 |
| Center Height | 1000 | 1000 | 1000 | 1000 | 1000 | 1000 |
| Output(kg/h) | 12 | 30 | 40 | 60 | 120 | 120 |
Key Advantages & Features
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Involute Gear Drive – High-precision transmission for low energy consumption and minimal noise.
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Custom Screw Designs – Nitrided to HV740-940; Ra≤0.8 µm surface finish for superior plasticization.
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Self-Made Core Components – Barrel, screw and gearbox produced in-house for consistent quality.
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Flexible Cooling/Feeding – Integrated feed and water-cooling jacket with forced-feeding groove.
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Digital Control System – Japanese RKC temperature controllers, SIEMENS contactors, ABB inverters (AC) or Eurotherm DC converter options.
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High Throughput – Output ranges from 12 kg/h (SJ35/25) to 1,200 kg/h (SJ150/33), with L/D ratios up to 33:1.
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Durable Construction – Alloy steel gears/shafts, nitrided surfaces, long service life.
FAQ
Q1: What materials can the SJ Series handle?
A: PVC, PE, PP, ABS and most other thermoplastics—ideal for both virgin and recycled resins.
Q2: How do I choose the right model?
A: Match your required throughput (12–1,200 kg/h) and screw diameter (35–150 mm) to your product specs. Contact us for a sizing guide.
Q3: What power configurations are available?
A: Models come with DC speed control (Eurotherm), or ABB inverter-driven AC options. Transmission power ranges from 5.5 kW to 400 kW.
Q4: Do you offer turnkey lines?
A: Yes—SJ extruders integrate seamlessly with downstream pelletizers, cooling systems, and auxiliary feeding units.
