SJ65/33 Single Screw Extruder – High-Performance Extrusion Solution for Plastics
Product Overview
The SJ65/33 single screw extruder is a robust and energy-efficient extrusion machine designed for continuous processing of various thermoplastics. With a 65 mm screw diameter and a 33:1 L/D ratio, it delivers excellent plasticizing effect, stable output, and low energy consumption. Ideal for manufacturers seeking a reliable workhorse for pipe, profile, sheet, and pelletizing lines.
Key Features – Why Choose SJ65/33 Single Screw Extruder
1. Superior Screw and Barrel Material
Screw and barrel made of 38CrMoALA with nitriding treatment (nitrided layer depth 0.5–0.8 mm), ensuring high wear resistance, corrosion resistance, and long service life.
Precision machined screw geometry for optimized melting and homogenization.
2. High-Torque Gearbox & Reliable Drive
Changzhou high-torque gearbox with gears made of 20CrMnTi, carburized and quenched for maximum durability.
Yaskawa inverter for stepless speed adjustment (0–110 rpm), providing precise control and energy savings.
Main motor: 37 kW AC, domestic top-brand motor.
3. Efficient Heating and Cooling System
5-zone cast aluminum heaters (total 27 kW) for uniform barrel heating; mica heater for die head (16 kW).
5-zone forced air cooling with individual 0.25 kW fans, ensuring precise temperature control and preventing material degradation.
Temperature range adjustable via TOKY temperature controllers.
4. High-Quality Electrical Components
Schneider Electric contactors, indicator lights, and push buttons.
TEND terminal blocks (Taiwan).
User-friendly rotary knob control panel for simple operation.
5. Enhanced Productivity & Stability
Output range: 70–120 kg/h (depending on material and process).
Center height: 1000±50 mm, easy to integrate with downstream equipment.
Water-cooled gearbox for continuous heavy-duty operation.
Applications – Versatile Uses in Multiple Industries
The SJ65/33 single screw extruder is widely adopted for:
Construction industry – PVC pipes, profiles, window frames, cable ducts.
Furniture manufacturing – edge banding, plastic trims, protective profiles.
Automotive sector – interior trim strips, sealing profiles, tubing.
Packaging & sheet – plastic sheets, thin films (with appropriate die).
Pelletizing & compounding – masterbatch, recycled material reprocessing.
Its flexibility makes it a preferred choice for small to medium-scale extrusion lines.
Technical Specifications – SJ65/33 Single Screw Extruder
| Screw diameter | 65 mm |
| L/D ratio | 33:1 |
| Screw speed | 0–110 rpm (Yaskawa VFD) |
| Output capacity | 70–120 kg/h |
| Main motor power | 37 kW AC |
| Barrel heating zones | 5 zones |
| Barrel heating power | 27 kW (cast aluminum) |
| Barrel cooling zones | 5 zones (air cooling, 0.25 kW each) |
| Die head heating | 16 kW (mica heater) |
| Gearbox material | 20CrMnTi, hardened teeth |
| Gearbox cooling | Water cooling |
| Control panel | Rotary knob, Schneider components |
Customer Recognition – Trusted by Extrusion Plants Worldwide
– Production manager, PVC profile plant, Southeast Asia
– Factory owner, recycling line, Africa
With over 200 units sold globally, the SJ65/33 series has proven its robustness, energy efficiency, and high ROI. Customers consistently rate it 4.8/5 for durability and ease of maintenance. Its competitive pricing and premium configuration make it a market leader in the 65mm single screw extruder segment.
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