U+ Series Twin Screw Extruder
The Useon U+ Series represents the pinnacle of our co-rotating twin-screw technology, specifically designed for precision compounding and high-torque applications.
Unlike standard extruders, the U+ Series is built to challenge the most demanding material processing tasks—from super engineering plastics like PEEK and LCP to high-loading reinforced modifications. At its core, it features a heavy-duty powertrain imported from Germany, delivering a specific torque of up to 15 Nm/cm³. This “High Precision, High Torque” philosophy allows you to process high-viscosity materials at lower melt temperatures, maximizing throughput while perfectly preserving material properties.
Table of Contents
Main Applications
Proven solutions based on actual delivery cases.
Super Engineering Plastics:
High-Performance Reinforcement:
For processing PA6/66, PBT, and PP reinforced with 40-60% Glass Fiber or Carbon Fiber. Specialized screw configurations ensure optimal fiber dispersion without breakage.
Heat/Shear Sensitive Materials:
Ideal for bio-degradable plastics (PLA, PBAT) and Fluoropolymers (PVDF, ETFE), featuring a low-shear design to prevent material degradation.
Reactive Extrusion (REX):
For TPU and PMMA polymerization or grafting reactions, offering an extended process window with L/D ratios up to 56:1.
High Concentration Masterbatch:
Utilizing high specific torque advantages to achieve extreme pigment dispersion.
Core Design & Modules
Drive Parts: The German Heart
The powertrain is the soul of the U+ Series. We refuse to compromise, selecting only time-tested, top-tier components.
Gearbox: Deep cooperation with Henschel (Germany) and Zambello (Italy). Configurable with the top-level T4Max series gearboxes, featuring industry-leading torque density (Torque Density Level up to 18) and a design life exceeding 50,000 hours.
Safety Coupling: Every U+ Series is equipped with a German Mayr (or equivalent) mechanical torque limiter. In the event of an overload, the coupling disengages power transmission in milliseconds, providing absolute protection for your screw and gearbox.
Motor: Selected high-efficiency motors from Innomotics (formerly Siemens) or equivalent. Optional ELIN Water-Cooled Motors are available for a more compact layout and superior energy efficiency.
Processing Section: Extreme Wear Resistance
Barrel: Modular 4L/D design. Standard equipment includes Nickel-based High-Wear Integral Alloy Liners, offering a lifespan 3 times longer than standard bimetallic sleeves.
Screw Elements: For high-wear conditions (e.g., 50% Glass Fiber), we provide HIP (Hot Isostatic Pressing) Powder Metallurgy elements for excellent abrasion resistance.
Flexible Configuration: Leveraging Useon’s extensive process database, we tailor the layout of side feeders, vacuum vents, and degassing sections specifically for your application.
Temperature Control: Precision & Stability
High-Temp Configuration: For high-temperature applications like PEEK/PPS, we utilize German GC-heat or equivalent high-power density heating cartridges. Their rapid thermal response and uniform heat distribution ensure temperature accuracy is locked within ±1°C even at 450°C.
Cooling System: Optimized internal soft-water circulation system equipped with stainless steel manifolds and high-efficiency heat exchangers. This eliminates scaling in flow channels and guarantees long-term stable cooling efficiency.
Smart Control: Digital Twin
System Architecture: Developed based on Siemens S7-1500 PLC or SCIYON IPC.
Core Functions:
- One-Key Start/Stop: Automated logic prevents operator error.
- Full Traceability: Real-time recording of Melt Pressure, Temperature, RPM, and Torque curves.
- Remote Maintenance: Built-in remote module allowing Useon engineers to provide online diagnostics and support at any time.
Specifications
| U Type | Screw diameter (mm) | Max. torque per shaft (Nm) | Specific torque Md/a³ (Nm/cm³) | Max. screw speed (min⁻¹) | Max. motor power (kW) |
|---|---|---|---|---|---|
| U2 Lab | 27 | 145 | 13.6 | 1200 | 37 |
| U3 | 36 | 405 | 15 | 1000 | 90 |
| U5 | 51 | 1190 | 15 | 1000 | 250 |
| U6 | 63 | 2100 | 15 | 1000 | 450 |
| U7 | 71 | 3240 | 15 | 1000 | 680 |
| U9 | 93 | 7110 | 15 | 900 | 1350 |
FAQ
A: The SAT Series is our cost-effective workhorse for general compounding. The U+ Series is our flagship product designed specifically for extreme conditions. It features imported German gearboxes as standard, boasts higher specific torque (up to 15 Nm/cm³), and tighter screw clearances, making it the premier choice for super engineering plastics and precision medical extrusion.
A: Absolutely. We customize the U+ Series with HIP powder metallurgy screw elements and integral alloy barrel liners specifically to resist the severe abrasion caused by materials like PEEK + 30% CF or PA66 + 50% GF. This capability has been verified at multiple customer sites.
A: While the U+ Series is capable of screw speeds up to 1000 rpm, its higher torque allows you to achieve the same output at lower speeds. This significantly reduces shear heat within the barrel, preventing the degradation of sensitive polymer chains (such as PEEK, PLA, LCP) and thereby improving the performance of the final product.
A: Because core components (Gearbox, Coupling) are imported directly from Europe, the typical delivery cycle for the U+ Series is 3 to 6 months. We recommend starting your project planning early, and we will assist you in optimizing the timeline.
A: Yes. We have successfully delivered multiple U3 and U7 lines for PEEK/PPS modification. We can share baseline screw configuration designs and process parameters to help you quickly pass lab trials and achieve mass production.
