Eurotech XTR50 Gear Pump Equipped Hot Melt Adhesive Extrusion Granulation Line

Overview

The Eurotech XTR50 Gear Pump Equipped Hot Melt Adhesive Extrusion Granulation Line is a purpose-engineered single-screw extrusion system designed for continuous, high-stability processing of thermoplastic hot melt adhesives (HMAs), reactive polyurethane dispersions (RPUs), and other shear-sensitive, high-viscosity polymer melts. Unlike conventional extruders relying solely on drag flow, the XTR50 integrates a precision-machined positive-displacement gear pump downstream of the extruder barrel—ensuring metering accuracy, pressure stability, and minimal residence time variation across production runs. This architecture mitigates thermal degradation risks inherent in HMAs and enables consistent pellet morphology during strand or underwater granulation. The system operates on the principle of controlled volumetric displacement, where the gear pump decouples melt delivery from screw rotational speed, allowing independent optimization of plasticization (via screw design and temperature zoning) and throughput control (via gear pump RPM). Its high-base structural frame provides mechanical rigidity for alignment-critical downstream integration—including die heads, water bath cooling troughs, haul-off units, and rotary cutters—making it suitable for inline granulation lines compliant with ISO 527-2 and ASTM D3895 standards for thermoplastic elastomer characterization.

Key Features

• Single-screw extruder with 50 mm screw diameter, optimized L/D ratio of 32:1 for balanced melting, mixing, and pressurization of HMAs
• Integrated helical gear pump with hardened alloy steel gears, backlash ≤ 15 µm, rated for continuous operation up to 35 bar discharge pressure
• Bimetallic barrel with dual-layer construction: outer carbon steel jacket + inner liner of Ni-Cr-Mo corrosion- and wear-resistant alloy (HRC ≥ 62)
• Screw fabricated from nitrided 38CrMoAlA steel with plasma-sprayed WC-Co coating (thickness 0.2–0.3 mm), ensuring >10,000 hours service life with mineral-filled or recycled feedstocks
• Eight-zone electric heating/cooling barrel control (±0.5 °C stability), each zone independently monitored via Pt100 RTD sensors and PID-regulated SSR outputs
• CE-compliant safety architecture including emergency stop circuitry, interlocked access guards, and torque-limiting clutch on main drive motor
• Modular configuration support: optional vent port (XTR-D variant) for moisture/volatiles removal under vacuum (≤ 5 mbar abs); wear-resistant XTR-WR variant available for abrasive fillers

Sample Compatibility & Compliance

The XTR50 accommodates a broad spectrum of hot melt formulations, including EVA-, PO-, APAO-, and polyamide-based adhesives; reactive HMAs containing isocyanate or silane functionality; and blends incorporating up to 40 wt% calcium carbonate, talc, or reclaimed polymer flake. Feedstock particle size range: 2–8 mm pellets or granules; bulk density ≥ 0.6 g/cm³. All wetted components comply with FDA 21 CFR §177.2400 for repeated food-contact use when configured with FDA-compliant seals and surface finishes (Ra ≤ 0.8 µm). System documentation supports GLP/GMP audit readiness per ISO/IEC 17025:2017 and includes full traceability of material certifications (EN 10204 3.1), pressure equipment declarations (PED Annex I), and electromagnetic compatibility test reports (EN 61000-6-2/-4).

Software & Data Management

Process parameters—including screw speed (0–120 rpm), gear pump RPM (0–60 rpm), eight-zone temperatures, main motor load (%), and discharge pressure—are acquired at 10 Hz via EtherCAT-connected I/O modules and logged in real time using Eurotech’s proprietary ExtrusionControl v4.2 software. The software enforces user-level access control (administrator/operator/maintenance tiers), maintains immutable audit trails meeting FDA 21 CFR Part 11 requirements (electronic signatures, time-stamped change logs), and exports CSV/Excel-compatible datasets synchronized with OPC UA server for MES integration (e.g., Siemens SIMATIC IT, Rockwell FactoryTalk). Batch reports include statistical process control charts (X̄-R) for melt temperature deviation and gear pump differential pressure—enabling proactive maintenance scheduling based on hydraulic efficiency drift thresholds.

Applications

• Continuous production of uniform HMA pellets for industrial adhesive dispensing systems (e.g., Nordson, Graco, ITW Dynatec)
• Formulation development and scale-up of reactive hot melts requiring precise stoichiometric control and minimal thermal history
• Recycling of post-industrial HMA scrap into reprocessable granules without additive loss or cross-linking
• Production of masterbatches containing heat-labile tackifiers or UV stabilizers requiring narrow thermal window processing
• Inline compounding of HMAs with nanofillers (e.g., fumed silica, organoclays) where shear history directly impacts dispersion quality and open-time performance

FAQ

What materials are compatible with the XTR50’s wear-resistant (XTR-WR) configuration?
XTR-WR is validated for extended service with highly abrasive feedstocks, including 30–40 wt% mineral-filled HMAs, reclaimed rubber compounds, and engineering thermoplastics containing glass fiber or carbon black.
Can the gear pump be bypassed for direct extrusion without granulation?
Yes—the system includes a manual three-way diverter valve upstream of the gear pump, enabling full-flow bypass for experimental extrusion trials or film/sheet pilot runs.
Is vacuum venting available as a factory-installed option?
Vacuum venting (XTR-D configuration) is offered with 100 m³/h vacuum pump, stainless steel vent housing, and condensate trap; requires separate utility connection for cooling water and oil mist extraction.
What documentation is supplied for regulatory validation?
Each unit ships with IQ/OQ protocols, FAT/SAT reports, material traceability dossiers, CE Declaration of Conformity, and calibration certificates for all critical sensors (temperature, pressure, rotational speed).