All Precision Instrument WYZ-240 Universal Sample Preparation Machine for Plastics & Polymers

Overview

The All Precision Instrument WYZ-240 Universal Sample Preparation Machine is an engineered solution for precise, repeatable fabrication of standardized test specimens from thermoplastics, thermosets, elastomers, acrylics (e.g., PMMA), and other non-metallic polymeric materials. Designed in strict alignment with international mechanical testing standards—including ASTM D638 (tensile), ASTM D256 (Izod/Charpy impact), ASTM D695 (compression), and ISO 527, ISO 179, and ISO 604—the WYZ-240 integrates three functionally independent machining modules into a single rigid platform: (1) dumbbell-shaped and flat-surface milling, (2) transverse specimen cutting, and (3) standardized notch milling (e.g., for Charpy or Izod impact testing). Its modular architecture enables sequential or isolated operation of each module, minimizing cross-contamination and thermal distortion during multi-step sample preparation. A closed-loop oil-based cooling system actively suppresses localized heat buildup at the tool–workpiece interface—critical for preserving polymer microstructure integrity and avoiding melt-induced dimensional drift in precision-machined features such as gauge sections or notch root radii.

Key Features

• Rigid cast-iron base frame with vibration-damping structural design, ensuring dimensional stability across extended machining cycles.
• Three independently controlled spindle assemblies, each optimized for its functional role: high-torque low-RPM spindles for milling dumbbell profiles and planar surfaces; variable-speed high-RPM spindle for clean, burr-free transverse cutting; dedicated constant-RPM spindle (400 rpm) for reproducible V-notch or U-notch generation per ASTM D256/ISO 179 requirements.
• Interchangeable tooling system compliant with ISO 2768-fine and DIN 6909 tolerances—includes standardized 30 × 12 × 30 mm flat/dumbbell cutters, 6 × 6 × 50 mm notch cutters, and 200 × 32 × 2 mm abrasive cutting wheels.
• Integrated oil circulation cooling circuit with thermostatically regulated flow (max. 2.5 L/min), preventing thermal degradation of heat-sensitive polymers such as PC, POM, or PET during prolonged machining.
• Manual precision feed control with calibrated vernier scales (0.02 mm resolution) and adjustable stop mechanisms for consistent specimen length, thickness, and notch depth.
• Full set of metrology-grade accessories included: alignment blocks, hardened steel template guides, hex key sets (4/5/6 mm), adjustable leveling feet, splash guards, and dedicated tool storage case—all traceable to internal calibration records.

Sample Compatibility & Compliance

The WYZ-240 accommodates sheet, rod, and molded plaque specimens up to 300 mm in length and 15 mm in thickness. It supports standard specimen geometries defined in ASTM, ISO, and GB/T test methods—including Type I and Type IV dumbbells (ASTM D638), 80 × 10 × 4 mm impact bars (ASTM D256), and compression cylinders (ASTM D695). All machined surfaces meet Ra ≤ 1.6 µm finish requirements for tensile and flexural testing per ISO 2768-mK. The machine’s mechanical repeatability (±0.05 mm positional accuracy over 100 consecutive cuts) satisfies GLP-compliant laboratory validation protocols. While not electronically networked, its fully manual, mechanically locked operation ensures immunity to software-related audit trail gaps—making it suitable for environments requiring FDA 21 CFR Part 11–exempt physical instrumentation under GMP Annex 11 and ISO/IEC 17025 Clause 6.4.2.

Software & Data Management

The WYZ-240 operates without embedded firmware or digital control interfaces. All motion, speed selection, and feed adjustment are executed via mechanical levers, stepped pulleys, and calibrated dials—eliminating dependency on proprietary software, drivers, or cybersecurity updates. This analog architecture ensures long-term operational continuity, simplifies IQ/OQ/PQ validation documentation, and avoids obsolescence risks associated with discontinued OS versions or deprecated communication protocols. Maintenance logs, calibration certificates (provided for all supplied tools), and operator training records constitute the sole documented data stream—fully compatible with paper-based or LIMS-integrated quality management systems operating under ISO/IEC 17025 or ISO 9001 frameworks.

Applications

• Preparation of ASTM D638 Type I tensile bars from injection-molded plaques or extruded sheets.
• Fabrication of notched Izod impact specimens (ASTM D256) with controlled root radius (0.25 mm ± 0.05 mm) and depth (2.0 mm ± 0.1 mm).
• Machining of flat-faced compression test specimens (ASTM D695) with parallelism tolerance < 0.02 mm across 25 mm span.
• Generation of standardized flexural test bars (ASTM D790) with precise width-to-thickness ratios.
• Custom profile milling for research-grade polymer composites where ASTM-defined geometries require adaptation for fiber orientation or filler distribution studies.

FAQ

Does the WYZ-240 support automated CNC programming or digital G-code input?
No. The WYZ-240 is a manually operated, mechanically actuated machine with no electronic motion control, stepper motors, or interface ports. All operations rely on calibrated handwheels, fixed-speed spindles, and physical templates.
Is the cooling system compatible with water-based coolants?
No. The integrated system is designed exclusively for mineral-based or synthetic cutting oils (ISO VG 32–68 viscosity grade). Water-based emulsions are prohibited due to risk of pump corrosion and bearing contamination.
Can the machine process filled or reinforced polymers (e.g., glass-filled nylon)?
Yes—within specified limits. Maximum recommended filler content is 30 wt% for short-glass or mineral-filled grades. Carbide-tipped tooling (optional) is advised for extended tool life when machining abrasive composites.
What metrological documentation accompanies shipment?
Each unit ships with a Factory Calibration Certificate (traceable to CNAS-accredited reference standards), Tool Geometry Inspection Report (for all supplied cutters), and Mechanical Repeatability Test Record (per 100-cycle validation protocol).
Is technical support available outside China?
Yes. All-inclusive remote commissioning, English-language operator manuals, and video-based troubleshooting guides are provided. On-site service is available via authorized regional partners in EU, North America, and Southeast Asia under annual support contract.