Goettfert X-trude600 Laboratory Twin-Screw Extruder

Overview

The Goettfert X-trude600 is a high-torque, modular twin-screw extruder engineered for precision laboratory-scale polymer processing and rheological characterization. Designed and manufactured in Germany by Goettfert—a leader in polymer rheology instrumentation with over 50 years of domain expertise—the X-trude600 operates on the principle of controlled melt conveying, shear generation, and thermal management within a tightly regulated barrel system. Its core architecture supports both standalone operation and seamless integration as a feed extruder for downstream analytical systems—including online capillary rheometers (e.g., Rheo-Test), in-line film thickness gauges, die swell modules, molten fiber tensile rheometers (e.g., Sentmanat Extensional Rheometer, SER), and granulation or blown-film lines. The unit employs co-rotating intermeshing screws housed in a segmented barrel with independent heating and liquid-cooled zones, enabling precise spatial control of thermal profiles across the entire extrusion path—from solids conveying through melting, homogenization, and metering—to die exit.

Key Features

• 600 Nm nominal torque output, supporting high-viscosity polymer melts (e.g., filled thermoplastics, elastomers, reactive systems) without speed droop or thermal overload
• Modular screw and barrel configuration: interchangeable screw diameters (20 mm, 1″, 30 mm, dual 35 mm) and L/D ratios optimized for compounding, devolatilization, or low-shear residence time studies
• Up to 16 independently controlled heating zones and 4 active cooling zones, ensuring axial temperature uniformity and suppression of premature degradation in heat-sensitive formulations
• Integrated high-accuracy pressure transducers (0–100 to 0–1000 bar range, ±0.5% FS) mounted at multiple barrel positions—enabling real-time calculation of wall shear stress, apparent viscosity, and extensional resistance via standard capillary rheology equations
• Liquid-cooled feed throat prevents premature melting and ensures stable solids conveying; critical for accurate feeding of hygroscopic, crystalline, or low-melting-point polymers
• Full digital control via industrial touchscreen HMI and optional PC-based ROSWIN software, supporting synchronized data logging of torque, pressure, temperature, screw speed, and motor current at ≥10 Hz sampling rate

Sample Compatibility & Compliance

The X-trude600 accommodates a broad spectrum of polymeric materials—including thermoplastics (PP, PE, PS, PC, PA), thermoplastic elastomers (TPEs), biopolymers (PLA, PHA), filled composites (glass/carbon fiber, mineral-filled PP), and reactive monomer systems (e.g., in-situ polymerization of polyurethanes). Its design conforms to ISO 11443 (plastics — determination of the melt mass-flow rate and melt volume-flow rate), ASTM D3835 (standard test method for determination of extrusion properties of thermoplastics), and supports GLP-compliant workflows when paired with ROSWIN’s audit-trail-enabled data acquisition (21 CFR Part 11-ready with user authentication, electronic signatures, and immutable raw-data archiving). All wetted surfaces are constructed from hardened stainless steel or nitrided tool steel, meeting FDA-compliant material contact standards for pharmaceutical excipient processing validation.

Software & Data Management

ROSWIN serves as the native control and analysis platform for the X-trude600, offering real-time visualization of process variables, automated calibration routines, and export-compatible data structures (CSV, XML, HDF5). It enables batch recipe management with parameter locking, multi-step ramp profiles (temperature, speed, feed rate), and cross-correlation analysis between pressure gradients and torque response. Raw sensor streams are timestamped and stored with metadata (operator ID, sample ID, environmental conditions), facilitating traceability in R&D reporting and regulatory submissions. Optional API integration allows ROSWIN to act as a node in Industry 4.0 testbeds—interfacing with MES systems or LabVantage LIMS via OPC UA or RESTful endpoints.

Applications

• Rheological fingerprinting of virgin and recycled polymer melts under realistic processing shear histories
• Compounding optimization: dispersion efficiency assessment of nanofillers, pigment masterbatches, or flame retardants
• Thermal stability screening via melt residence time distribution (RTD) analysis using tracer injection protocols
• Die swell and draw-down behavior quantification prior to film or fiber spinning trials
• Feedstock qualification for additive manufacturing (e.g., filament extrusion for FFF/FDM)
• Process validation support for ISO 13485 medical device component manufacturing

FAQ

Can the X-trude600 be used for reactive extrusion experiments?
Yes—its sealed barrel design, inert gas purge ports, and precise temperature zoning support controlled free-radical grafting, transesterification, and condensation polymerization under vacuum or nitrogen blanket.
Is ROSWIN software validated for GMP environments?
ROSWIN includes optional 21 CFR Part 11 compliance packages, including role-based access control, electronic signature workflows, and audit trail generation—all documented in the vendor’s IQ/OQ validation protocol library.
What feed systems are compatible with the X-trude600?
It accepts gravimetric twin-screw feeders (e.g., Brabender DSE, Coperion ZSE), loss-in-weight hoppers, and side-stuffers with analog/digital I/O synchronization via 0–10 V or 4–20 mA signals.
Does the X-trude600 support dynamic torque measurement during transient operations?
Yes—its high-bandwidth torque transducer (≥1 kHz response) captures instantaneous torque fluctuations during start-up, speed ramps, or compositional changes, enabling viscoelastic relaxation time estimation.
Are replacement barrels and screws available with specialized surface treatments?
Goettfert offers barrels with bimetallic linings (NiCrFe alloy), plasma-nitrided screws, and corrosion-resistant variants for PVC or halogenated polymer processing—available under custom order with lead-time documentation.