Labthink C612M Fully Automated Cap Torque Tester

Overview

The Labthink C612M Fully Automated Cap Torque Tester is an industrial-grade rotational torque measurement system engineered for precise, repeatable quantification of closure application and removal torque in threaded packaging systems. It operates on the principle of controlled rotational force application via pneumatically actuated gripper arms, coupled with high-fidelity strain-gauge-based torque transduction. Designed for quality assurance laboratories and production line validation environments, the C612M delivers traceable, auditable torque data essential for compliance with packaging integrity standards across pharmaceuticals, food & beverage, cosmetics, and medical device industries. Its dual-mode architecture supports both cap tightening (application) and opening (removal) testing under programmable angular velocity, dwell time, and target torque setpoints—enabling full characterization of sealing performance, child-resistant functionality, and user-accessibility thresholds.

Key Features

• Fully automated “robotic hand” operation: Patented dual-gripper pneumatic system enables hands-free cap clamping, rotation, and release—eliminating operator-induced variability and ensuring inter-laboratory reproducibility.
• Dual-test mode capability: Independent configuration for application torque (tightening) and removal torque (opening), each with adjustable rotational speed (0.1–10 rpm), torque ramp rate, and hold duration.
• Ultra-high resolution measurement: 0.0001 N·m resolution and certified accuracy of ±0.05% FS at low-end range (<10% of sensor full scale), enabling reliable quantification of sub-5 mN·m closures used in ophthalmic vials and single-dose ampoules.
• Intelligent overload protection and auto-zeroing: Real-time torque monitoring triggers immediate motion cessation upon exceeding preset limits; automatic zero calibration before each test ensures baseline stability.
• Industrial touchscreen HMI: 10.1-inch capacitive display with multi-language UI (English/Chinese), real-time torque vs. time curve visualization, and one-touch test initiation.
• Configurable clamping geometry: Modular bottle body and cap grippers accommodate cylindrical containers from Φ5 mm to Φ170 mm diameter and caps from Φ10 mm to Φ80 mm—supporting PET, HDPE, glass, and aluminum closures.

Sample Compatibility & Compliance

The C612M accommodates a broad spectrum of threaded packaging formats including screw-capped bottles (e.g., water, juice, pharmaceutical bottles), collapsible tubes (e.g., ointment, toothpaste, cosmetic tubes), vacuum-insulated vessels (e.g., thermos flasks), and specialty closures requiring ISO-standard torque verification. It conforms to multiple international regulatory and industry test methods: GB/T 17876 (China), ASTM D2063 (Standard Test Method for Measurement of Torque Required to Open or Close Rigid Containers), ASTM D3198 (Torque Testing of Child-Resistant Closures), ASTM D3474 (Calibration of Torque Measuring Devices), BB/T 0025 (Packaging—Plastic Caps for Bottles), and BB/T 0034 (Packaging—Aluminum Screw Caps). Optional configurations meet FDA 21 CFR Part 11 requirements for electronic records and signatures when paired with Labthink’s DataShield™ software suite and validated computer system protocols.

Software & Data Management

The embedded control firmware supports local data storage of up to 1200 test records with timestamp, operator ID, sample ID, torque curve metadata, and statistical summaries (mean, SD, CV%, min/max). All data are stored in non-volatile memory with power-loss recovery—ensuring no record corruption during unexpected shutdowns. USB 2.0 interface enables direct export of CSV-formatted datasets to external PCs or LIMS. Optional Labthink TorqueMaster™ PC software provides advanced analysis tools: comparative trend charts, SPC control charts (X̄–R, Cpk), batch-level pass/fail reporting, and PDF certificate generation. Multi-tier user authentication (administrator, technician, viewer) enforces role-based access control. When integrated with DataShield™, the system supports centralized database synchronization, audit trail logging per ALCOA+ principles, and seamless ERP/MES connectivity via RESTful API.

Applications

• Pharmaceutical packaging: Validation of tamper-evident and child-resistant closures per USP , EU Annex 1, and ICH Q5C guidelines; torque consistency checks for lyophilized vial stoppers and dropper assemblies.
• Food & beverage QA/QC: Monitoring cap torque drift across production shifts to prevent leakage, spoilage, or consumer dissatisfaction; correlation studies between torque and seal integrity (e.g., helium leak rate).
• Cosmetic product development: Optimization of dispensing force for pump sprayers and flip-top caps; fatigue testing of repeated open/close cycles.
• Medical device packaging: Verification of sterile barrier integrity for peel-open pouches with twist-lock lids and diagnostic kit enclosures.
• R&D engineering: Characterization of thread geometry effects (pitch, flank angle, material pairing) on break-loose torque; lubrication efficacy assessment for silicone-coated closures.

FAQ

What torque ranges does the C612M support out-of-the-box?
The standard configuration includes a 5 N·m load cell. Optional 20 N·m and 40 N·m sensors are available for heavy-duty industrial closures such as large-diameter drum lids or pressurized gas canisters.
Is compressed air supply included with the instrument?
No—the C612M requires an externally supplied clean, dry air source at 0.7 MPa (101.5 psi) via Ø4 mm polyurethane tubing. An oil-free laboratory-grade air compressor is recommended for optimal long-term reliability.
Can the C612M be integrated into a GMP-compliant manufacturing environment?
Yes—when equipped with optional GMP Computer System Validation (CSV) package, electronic signature modules, and DataShield™ integration, it satisfies 21 CFR Part 11, EU Annex 11, and ISO 13485 documentation requirements for regulated production lines.
How is calibration traceability maintained?
Each unit ships with a NIST-traceable calibration certificate covering the full operating range. Labthink-certified field service technicians perform annual recalibration using primary-standard torque calibrators accredited to ISO/IEC 17025.
Does the system support custom test protocols beyond standard methods?
Yes—the scripting engine allows users to define multi-step sequences (e.g., pre-torque dwell → ramp-to-target → hold → reverse rotation), conditional logic, and pass/fail criteria based on dynamic torque thresholds—not limited to static peak detection.