Servo SJ65/33 Single-Screw Extruder

Servo SJ65/33 Single-Screw Extruder

Precision Servo Drive and Stable Throughput

The SJ65/33 adopts a high-torque servo motor with vector control, delivering rapid start/stop response, low RPM ripple, and excellent melt stability. Closed-loop speed and pressure control ensure consistent output and superior granule quality across a wide range of recipes.

Optimized 33:1 L/D Screw Design

A proven barrier/mixing screw profile provides efficient melting, homogenization, and devolatilization. Optional mixing elements, shear-reducing sections, and wear-resistant bimetallic liners support abrasive fillers and high mineral loadings without sacrificing output.

Advanced Materials and Hygienic Build

Product-contact parts use nitrided or bimetallic barrels and high-wear screw metallurgy (38CrMoAlA, W6Mo5Cr4V2 options). Surface finishes minimize material hang-up and enable quick color change. Seals and gaskets are heat-resistant for stable operation with engineering polymers.

Smart Process Control and PAT-Ready

HMI/PLC with multi-zone barrel temperature control, melt pressure/temperature trending, and recipe management. Optional PAT integrations—inline moisture (NIR), torque/pressure analytics, and gravimetric feeder synchronization—enable data-driven optimization and QbD-aligned scale-up in pilot granulation lines.

Energy-Efficient, Low Noise, Compact Footprint

Servo drive plus VFD-controlled auxiliaries reduce energy consumption by 10–20% versus conventional induction systems. The compact, skid-friendly layout fits labs, pilot plants, and small-batch production cells while maintaining industrial reliability.

Seamless Upstream/Downstream Integration

Compatible with lab-scale granulation equipment and pilot-scale granulation lines: supports side feeders, liquid dosing, strand or water-ring pelletizers, air knives, and inline classifiers. Recipe portability simplifies transition from R&D to small-batch manufacturing.

Application Areas

Building and Construction

• PVC/PE/PP profiles, sealants, cable compounds, flame-retardant masterbatches, cement/plaster additives granulation.

Furniture and Wood Composites

• WPC masterbatch, color and UV stabilizer concentrates, scratch-resistant additives for decorative panels and edges.

Automotive and E-Mobility

• PP/PA/ABS/TPE compounding, lightweight fillers, conductive and antistatic blends, battery-pack accessory materials.

Appliances and Consumer Goods

• Color masterbatches, impact modifiers, odor/VOC-reduction formulations for housings and functional parts.

Specialty Chemicals and Additives

• Mineral-filled granules, desiccant masterbatch, nucleating agents, anti-block/slip additives.

Pilot-Scale R&D and Small-Batch Granulation

• Formulation screening, DoE, and process optimization with wet/dry/melt granulation compatibility and fast changeover.

Technical Specifications

Core Performance

• Screw diameter: 65 mm
• L/D ratio: 33:1
• Typical output: 120–280 kg/h (material and formulation dependent)
• Melt temperature control: multi-zone barrel with PID control, ±1.5 °C stability
• Melt pressure range: 0–25 MPa, high-precision transducer

Drive and Mechanics

• Servo motor: high-torque, energy-saving design with vector control
• Main motor power: 45–75 kW (configuration dependent)
• Gearbox: low-noise, high-torque gearbox with hardened gears
• Barrel options: nitrided steel or bimetallic liners for abrasive/high-fill systems
• Screw design: barrier + mixing sections; optional Maddock, pineapple, or blister elements

Feeding and Dosing

• Main feeder: gravimetric or volumetric
• Side feeder: twin-screw side feeder for fillers and recyclate
• Liquid dosing: 0.1–5.0 L/h for additives and plasticizers with closed-loop flow control

Process and PAT

• Sensors: melt temperature, melt pressure, motor torque, barrel zone temperatures
• PAT options: inline NIR moisture, inline particle size (downstream), torque/pressure trending
• Data and connectivity: OPC UA/Modbus TCP, CSV batch export, e-signature ready

Pelletizing and Cooling

• Strand pelletizer or water-ring pelletizer
• Air knife, water bath, or air cooling tunnel
• Inline classifier/screener for granule size control

Utilities and Energy

• Power supply: 380–480 V, 50/60 Hz, 3-phase
• Installed power: 55–95 kVA (depending on auxiliaries)
• Compressed air: 6–8 bar for cutters and valves
• Cooling water: 0.2–0.5 m³/h, 15–25 °C typical
• Energy efficiency: 10–20% lower consumption vs. non-servo equivalents

Materials and Compliance

• Contact materials: nitrided/bimetallic barrel, wear-resistant screw metallurgy
• Standards: CE marking; documentation for IQ/OQ available for regulated environments
• Safety: interlocks, over-torque and over-pressure protection, E-stop circuitry

User Recognition

Proven Market Performance

• Widely adopted by plastics compounders and R&D centers for masterbatch and additive granulation, with documented reductions in scrap and cycle time.
• Demonstrated stable throughput at low RPM for heat-sensitive polymers and precise moisture control when integrated into pilot-scale granulation lines.

Customer Feedback

• “Servo control delivered immediate torque response—color changes are faster and output is more consistent.”
• “With bimetallic barrels, CaCO3-filled PP ran 20% longer between maintenance intervals.”
• “Integration with NIR moisture and gravimetric feeders helped us hit CQAs on the first pass.”

Representative Case Studies

• Building Materials: Produced flame-retardant PP masterbatch with ±0.3% additive accuracy, reducing rework by 35%.
• Automotive: Compounded glass-filled PA with stable melt pressure, improving dimensional stability in injection-molded parts.
• R&D Scale-Up: Transferred a lab formulation to small-batch production with PAT guidance, achieving target granule size distribution without additional trials.

Why It Wins

Innovation and Competitive Edge

• Servo-driven precision, optimized 33:1 L/D screw geometry, and PAT-ready controls combine to maximize output stability and granule quality.
• Modular ecosystem compatible with lab granulation equipment and pilot granulation lines, enabling fast DoE cycles and risk-mitigated scale-up.
• Energy-efficient, compact, and compliance-ready—ideal for Google-ready product pages targeting small-batch granulator and pilot-scale granulation keywords.