Semi Automatic Melt Flow Indexer (MFI)

Semi Automatic Melt Flow Indexer (MFI) – QualiFi™ 6000SA

QualiFi™ 6000SA is a semi-automatic, safety-enhanced melt flow indexer developed for B2B plastics testing laboratories that require higher throughput, reduced operator involvement, and improved safety compared to a standard automatic weight-loading instrument. It measures MFR across 0.1–100 g/10 min and MVR up to 3000 cm³/10 min at temperatures from 50 to 450 °C. This melt flow index tester integrates pneumatic material compaction, pneumatic residual extrusion, pneumatic barrel cleaning, and a weight fall-prevention guard within the QualiFi™ Series platform—delivering a safer, faster, and more repeatable testing workflow than the QualiFi™ 5000. CE certified and CNAS proficiency-verified, the QualiFi™ 6000SA is a reliable upgrade melt flow index tester for high-frequency QC and production monitoring environments across North America.

The QualiFi™ 6000SA is a pneumatic-assisted semi-automatic melt flow indexer designed for plastics testing environments where test throughput, operator safety, and measurement repeatability are higher priorities than compact benchtop design. Built on the QualiFi™ Series platform, it retains the core measurement precision, dual PID temperature control, and software capabilities of the QualiFi™ 5000 while adding pneumatic-assisted functions and a weight fall-prevention guard that reduce manual intervention, minimize human error, and improve operator safety during frequent testing cycles.

The weight is manually selected by the operator but automatically lifted and lowered without physical handling once selected, similar to the QualiFi™ 5000 lifting mechanism. A weight fall-prevention guard is added in the 6000SA, physically securing the weight stack and reducing the risk of uncontrolled weight movement during operation. Material compaction is performed pneumatically with adjustable force and time (10–50 kg), removing variability from manual compaction and improving repeatability for high-viscosity materials.

Pneumatic residual material extrusion uses adjustable pneumatic load (10–50 kg) to remove remaining polymer from the barrel after each test, reducing between-test cleaning time and effort. Pneumatic barrel cleaning completes the post-test cycle using compressed air to clear internal residue, eliminating the need for manual rod cleaning typically required on standard melt flow index testers. These three pneumatic functions reduce total turnaround time between tests, making the QualiFi™ 6000SA suitable for high-frequency QC environments where multiple tests are performed per shift.

All core QualiFi™ Series platform features are retained, including the 10.1-inch HD touch screen, 50–450 °C dual PID temperature control, ±0.2 °C temperature accuracy, 0.002 mm piston displacement resolution, 8 customizable test plans, 5,000-group USB data storage with DMS software, optional PC two-way control, and multi-language interface support. The floor-standing design (580×480×1450 mm) accommodates the pneumatic assembly and weight guard system and requires a compressed air supply above 0.6 MPa.

Semi Automatic Melt Flow Indexer (MFI) – QualiFi™ 6000SA Applications

The QualiFi™ 6000SA melt flow indexer is designed for B2B plastics testing environments where test frequency, operational safety, and throughput are key requirements, and where variations from manual compaction in a standard melt flow index tester can impact result consistency.

High-Frequency Production QC:
Incoming and outgoing inspection of polyolefin, engineering plastic, and specialty resin batches at high testing volumes. Pneumatic cleaning and residual extrusion reduce between-test downtime and improve workflow efficiency.

High-Viscosity Polymer Testing:
MFR/MVR evaluation of materials such as nylon, polycarbonate, fluoroplastics, and other engineering resins requiring stable and repeatable compaction force. Pneumatic compaction eliminates operator-dependent variation associated with manual loading.

Petrochemical & Compounding Lines:
Process control and product validation of polymer melts and compound formulations that require consistent test conditions and fast changeover between samples without dismantling the barrel assembly.

Plastics Manufacturing Operations:
Batch qualification, supplier verification, and extrusion or injection molding process monitoring based on defined MFR limits in accordance with ISO 1133 and ASTM D1238 standards.

Regulated & Accredited Laboratories:
Third-party testing, certification, and inspection workflows requiring traceable data export, user access control, and CNAS-verified measurement consistency across repeated test cycles.

Academic & Applied Research:
Polymer behavior analysis, blend formulation studies, and comparative melt flow testing across material grades with detailed data logging and reproducible test conditions.

Standards

The QualiFi™ 6000SA melt flow indexer is designed and verified in accordance with internationally recognized standards for thermoplastic melt flow rate testing, laboratory measurement accuracy, and equipment safety.

• ISO 1133-1:2011 — Plastics: Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of thermoplastics — Part 1: Standard procedure
• ISO 1133-2:2011 — Plastics: Determination of MFR and MVR of thermoplastics — Part 2: Method for materials sensitive to time-temperature history and/or moisture
• ASTM D1238 — Standard Test Method for Melt Flow Rates of Thermoplastics by Extrusion Plastometer (Procedures A and B)
• IEC 61010-1 / EN 61010-1:2010+A1:2019 — Safety requirements for electrical equipment used in measurement, control, and laboratory applications (CE certified)
• EN 61326-1:2013 — Electrical equipment for measurement, control, and laboratory use: EMC requirements (CE certified)
• ISO 9001:2015 — Quality management system standard applied to laboratory instrument manufacturing processes

Certifications and Proficiency Verification

The QualiFi™ 6000SA is built on the validated QualiFi™ Series platform and maintains the same core compliance framework across the product family, including CE certification and repeated CNAS proficiency testing validation.

CE Certification:
Complies with EN 61010-1:2010+A1:2019 (Low Voltage Directive) and EN 61326-1:2013 (EMC requirements), confirmed through ECM Certificate of Compliance.

CNAS Proficiency Testing:
Verified through consecutive CNAS inter-laboratory proficiency comparisons, with all results within acceptable limits. Reported Z-scores remain in the range of −0.07 to +0.11 across all evaluation rounds.

Technical Patents:
The QualiFi™ Series includes multiple registered technical patents covering core measurement systems, thermal control architecture, and structural design innovations.

Semi Automatic Melt Flow Indexer (MFI) – QualiFi™ 6000SA Key Features

Pneumatic Systems and Safety Step-up from QualiFi™ 5000

The QualiFi™ 6000SA integrates enhanced pneumatic systems over the QualiFi™ 5000, improving consistency, efficiency, and operator safety in melt flow index testing workflows.

Pneumatic Material Compaction (10–50 kg adjustable):
Provides controlled compaction force and timing, eliminating operator-dependent variation during sample preparation and improving run-to-run MFR/MVR repeatability.

Pneumatic Residual Material Extrusion (10–50 kg adjustable):
Uses controlled pneumatic load to remove remaining polymer from the barrel after testing, reducing reliance on manual rod operation and accelerating post-test processing.

Pneumatic Barrel Cleaning:
Applies compressed air to clear residual material from the barrel interior, significantly reducing between-test preparation time and improving efficiency in high-frequency testing environments.

Weight Fall-Prevention Guard:
A mechanical safety system that physically secures the weight stack, preventing uncontrolled descent during setup, weight changes, or loading operations. This adds an extra layer of operational safety compared to the QualiFi™ 5000.

Preloading System (Dual Mode):
Supports two controlled loading ranges to ensure accurate and repeatable test conditions across different materials:

• Calibration weight load: 0.325–21.6 kg
  
• Additional load: 10–50 kg

Both modes allow adjustable positioning to support precise reproduction of test parameters for varied material types.

Preheating Function:
Supports both no-load and loaded preheating operation modes, enabling flexible preparation protocols based on material characteristics and specific testing requirements.

Core Measurement Platform

Core components including the oven, die, and piston are manufactured from low-thermal-expansion, corrosion-resistant alloy materials that comply with ISO 1133 dimensional stability and hardness requirements, ensuring long-term measurement accuracy under high-temperature conditions.

Temperature Control System:
Operating range: 50–450 °C
Temperature resolution: 0.01 °C
Maximum indication error: ≤0.2 °C
Fluctuation: ≤±0.2 °C
Temperature gradient: ≤±0.1 °C

The system uses dual PID temperature control for rapid, overshoot-free heating and stable regulation. After material loading, temperature recovery time is typically ≤2 minutes, supporting continuous high-frequency testing.

Measurement Precision System:
Piston displacement resolution: 0.002 mm
Maximum indication error: ±0.02 mm
Timer resolution: 0.001 s

These parameters support high-accuracy MFR/MVR determination with stable time and displacement tracking during extrusion testing.

Extended Flow Measurement Capability:
Maximum measurable flow rate reaches up to 3000 cm³/10 min, extended through a lever-operated die plug device for broader material applicability.

Weight Handling and Automation:
The system enables automatic lifting and lowering of weights without manual handling during operation. Weight selection is performed manually prior to test initiation, supporting controlled and repeatable loading conditions.

User Interface and Observation System:
A 10.1-inch HD full-color touchscreen is integrated at the front of the oven for direct control and monitoring. A variable-angle metal observation mirror with 15° adjustable viewing and a shatter-resistant surface allows safe visual inspection during operation.

Safety Structure:
A movable protective cover shields the area between the furnace body and loading mechanism during high-temperature operation, improving operator safety and reducing exposure to heated components.

Software and Data Management

The system supports Mass Method (A), Volume Method A, and Volume Method B testing, with automatic identification of ISO/ASTM test intervals and automated test initiation to streamline workflow execution.

Test Configuration:
Provides 8 customizable test plans for direct selection before testing, reducing repetitive parameter setup in routine laboratory operations and improving workflow efficiency.

Real-Time Monitoring:
Displays temperature–time and MVR–number curves in real time on the screen, enabling immediate evaluation of thermal stability and result consistency during testing.

Data Storage and Reporting:
USB flash drive storage supports up to 5,000 test result groups. Integrated DMS data management software enables data export and structured report generation for laboratory documentation and traceability.

PC Integration and Connectivity:
Optional PC software allows two-way system control and remote database upload, supporting centralized data management in multi-instrument environments.

Multi-Language Interface:
Supports English, French, German, Italian, Russian, and Chinese for flexible international laboratory use.

User Access Control:
Includes user authority management with configurable role-based permissions to safeguard measurement data integrity and prevent unauthorized parameter modifications in shared laboratory settings.

Theory and Method

Melt Flow Rate Measurement Principle

The QualiFi™ 6000SA operates based on the extrusion plastometer principle defined in ISO 1133 and ASTM D1238. A thermoplastic resin sample is introduced into a heated barrel and stabilized at the specified test temperature. A piston applies a defined load, forcing the molten polymer through a standard die (Φ2.095 mm) located at the base of the barrel.

MFR (mass method, Procedure A) is determined by measuring the mass of extrudate collected at timed intervals. MVR (volume methods A and B) is calculated from piston displacement over a defined time period. The QualiFi™ 6000SA automates weight lifting, timing control, cutting, and result calculation, while also integrating pneumatic compaction, pneumatic residual extrusion, and pneumatic barrel cleaning. These additions reduce the number of manual operations per test cycle compared to the QualiFi™ 5000.

Pneumatic Compaction System

Material compaction, the process of pressing the loaded polymer charge into the barrel prior to testing, is performed pneumatically on the QualiFi™ 6000SA with adjustable load and time (10–50 kg). In conventional melt flow index testers, this step is carried out manually using a feeding rod, which can introduce variation in applied force and compaction duration.

The pneumatic system provides a consistent and repeatable compaction force across all test cycles, independent of operator technique. This improves run-to-run repeatability of MFR/MVR results, particularly for high-viscosity polymers and powder materials where pre-test density uniformity is critical.

Pneumatic Residual Extrusion and Barrel Cleaning

After each test cycle, remaining polymer in the barrel must be removed before the next sample is introduced. The QualiFi™ 6000SA performs this in two pneumatic stages:

First, pneumatic residual extrusion applies an adjustable load (10–50 kg) to expel remaining polymer from the barrel and die, replacing manual push-rod operation used in conventional systems.

Second, pneumatic barrel cleaning uses compressed air to remove residual material from the internal barrel surface.

Together, these steps significantly reduce post-test turnaround time, minimize operator effort, and reduce exposure to high-temperature components, strengthening the safety-oriented design of the 6000SA.

Weight Fall-Prevention Guard

In floor-standing melt flow indexers, the weight stack is positioned at an elevated height, creating a potential risk of uncontrolled descent during setup, weight adjustment, or mechanical irregularities.

The QualiFi™ 6000SA incorporates a dedicated weight fall-prevention guard that physically restricts the weight stack movement and prevents uncontrolled descent events. This hardware safety mechanism is not included in the QualiFi™ 5000 and is specifically designed for the taller floor-standing structure of the 6000SA.

Dual PID Temperature Control and High-Precision Displacement

The QualiFi™ 6000SA retains the same core temperature control and measurement architecture as the QualiFi™ 5000 platform. A high-temperature heating system and sensor assembly rated for continuous operation from 50 to 450 °C is controlled by a dual PID temperature regulation system.

This ensures rapid, overshoot-free heating, stable multi-zone thermal distribution with a temperature gradient of less than ±0.1 °C, and recovery to stable conditions within 2 minutes after sample loading.

Piston displacement is measured with a resolution of 0.002 mm and a maximum indication error of ±0.02 mm. Timer resolution is 0.001 s, supporting precise MVR calculation across a measurement range of 0.01 to 3000 cm³/10 min.

Semi Automatic Melt Flow Indexer (MFI) – QualiFi™ 6000SA Technical Specifications

Standard Configuration

Each QualiFi™ 6000SA ships with all accessories required for immediate MFR and MVR testing per ISO 1133 and ASTM D1238, plus PC software. Note that a compressed air supply of more than 0.6 MPa is required for the pneumatic functions.

Optional Accessories