TianYuan TY-7006B Open Two-Roll Mill (Analog Control / Electrically Heated / Single-Speed)

Overview

The TianYuan TY-7006B Open Two-Roll Mill is an analog-controlled, electrically heated laboratory-scale mixing and compounding mill engineered for R&D and quality control laboratories in the rubber and thermoplastic industries. It operates on the fundamental principle of shear-induced dispersion and homogenization: two counter-rotating rolls—driven by a single-speed gearmotor—generate controlled shear stress and residence time as viscoelastic materials are passed repeatedly through the narrowing nip zone. The fixed speed ratio (1:1.35) ensures consistent shear rate distribution across the roll surface, while precise manual gap adjustment (0–3 mm) enables reproducible thickness control for sheeting, mastication, or pre-forming operations. Designed for low thermal inertia and rapid process iteration, the unit integrates electric heating elements with analog temperature controllers for thermoplastic applications, and optional water-cooling circuits (via rotary unions) for exothermic rubber compound processing—ensuring stable surface temperatures within ±3 °C under steady-state operation.

Key Features

• Robust cast iron frame with alloy chilled-iron rolls (surface hardness ≥65 HRC) for high wear resistance and dimensional stability during prolonged operation.
• Single-speed drive system with BWO220-23 helical-bevel gearmotor (2.2 kW), delivering reliable torque transmission and minimal maintenance requirements.
• Manually adjustable roll gap via calibrated handwheel and vernier scale, enabling repeatable setting from 0 to 3 mm with ±0.05 mm visual resolution.
• Dual-mode thermal management: electric heating rods (for plastics) controlled by analog thermostats; optional water cooling path (inlet/outlet via rotary unions) for rubber processing.
• Integrated emergency stop system complying with ISO 13850:2015 — pull-cord actuation triggers dynamic reverse-phase braking, achieving full roll stop within ≤¼ revolution (typical response time < 0.8 s).
• Adjustable end shields prevent material migration into bearing housings; removable design facilitates cleaning and inspection without disassembly.

Sample Compatibility & Compliance

The TY-7006B accommodates a broad range of elastomeric and thermoplastic compounds—including natural rubber (NR), SBR, EPDM, NBR, TPEs, PVC, and polyolefin blends—within its 0.5–1 kg batch capacity. Its mechanical configuration meets baseline safety and operational requirements defined in GB/T 12722–2008 (Chinese national standard for open mills) and aligns with general-purpose laboratory equipment provisions under ISO/IEC 17025:2017 for method validation environments. While not certified for GMP production lines, its construction supports GLP-compliant documentation workflows when paired with external logbooks or LIMS-integrated process records. All electrical components conform to IEC 60204-1:2018 for industrial machinery safety.

Software & Data Management

As an analog-control instrument, the TY-7006B does not incorporate embedded digital firmware or proprietary software. Temperature setpoints and operational status are monitored via front-panel analog meters and mechanical indicators. Users may integrate external data loggers (e.g., Omega OM-DAQPRO series) via 4–20 mA or 0–10 V analog outputs (optional retrofit) to capture real-time roll surface temperature, motor current draw, and runtime duration. Such configurations support traceability requirements under FDA 21 CFR Part 11 when paired with validated electronic record systems and audit-trail-enabled acquisition software.

Applications

• Rubber compound development: mastication of raw NR, dispersion of carbon black/filler systems, and pre-sheeting prior to extrusion or calendering.
• Thermoplastic formulation trials: dry blending of polymer resins with additives (lubricants, UV stabilizers, flame retardants), melt homogenization, and pellet feedstock preparation.
• QC testing: consistency evaluation of Mooney viscosity batches, scorch time assessment (ASTM D1646), and gel content screening.
• Educational use: demonstration of polymer rheology fundamentals, including shear thinning behavior, die swell estimation, and thermal degradation onset under controlled shear history.

FAQ

What is the maximum operating temperature for the electric heating system?
The analog temperature controller supports setpoints up to 180 °C, limited by heater element rating and thermal insulation integrity. Continuous operation above 150 °C requires periodic verification of thermocouple calibration.
Can water cooling be retrofitted to a standard TY-7006B unit?
Yes—units ordered with “cooling-ready” configuration include pre-drilled ports and rotary unions; field retrofit requires machining of inlet/outlet passages and installation of a closed-loop chiller (recommended flow rate: 3–5 L/min at 2–3 bar).
Is the roll speed ratio adjustable?
No—the 1:1.35 speed ratio is mechanically fixed via precision-machined gear sets; variable-ratio operation requires the TY-7006C series with dual-inverter drive.
What maintenance intervals are recommended for the gearmotor?
Gear oil replacement every 2,000 operating hours; visual inspection of chain tension and roller bearing play every 500 hours; annual verification of brake contactor timing and coil resistance.
Does this model comply with CE marking requirements?
The base TY-7006B does not carry CE marking; CE compliance requires additional modifications including EN 60204-1-compliant wiring, reinforced emergency circuit redundancy, and third-party notified body assessment—available upon special order.