KR-722B Automatic Cleaning Capillary Rheometer

Additional information

Model

RT-722B

L/D

5:1/10:1/20:1/40:1

Max load

5KN/10KN

Max temp

400℃

 

RT-722 Shear Rate Calculation Capillary Rheometer

Adopting the streamlined design of the “mouth” frame, the instrument can be expanded into a double-indenter test mode without replacing the main unit. The loading adopts the whole moving double kinetic energy of the upper body moving loading mode, and the pressurization is more stable. With a scale display function, it can visualize the displacement position of the material rod. The outwardly removable material chamber and motorized automatic material clearing function save time and labor.

Product Details:

 

Product Brief

The KR-722B automated cleaning capillary viscometer is a fully computer-controlled polymer rheology testing instrument optimized for high-frequency laboratory batch detection. Distinct from conventional manual-clean rheometers, this model integrates an electric auxiliary clearing unit and rotatable furnace chamber structure, drastically cutting manual cleaning labor and shortening the interval between test groups.
It applies precise piston extrusion under adjustable pressure and speed to measure melt apparent viscosity, shear stress and flow stability of thermoplastics. The whole system strictly complies with ISO 11443 and ASTM D3835 international test standards, supporting five mainstream test modes to simulate real extrusion, injection and blow molding shear environments. It is widely deployed in modified plastic factories, nylon/PBT engineering plastic R&D labs, masterbatch manufacturers and CNAS accredited third-party material inspection centers.

 

 

 

Core Unique Advantages

  1. Integrated Automatic Cleaning System, Greatly Boost Lab Efficiency
    Two time-saving structural designs solve the biggest pain point of traditional rheometers:
  • Electric auxiliary cleaning device quickly scrapes residual molten polymer inside barrel and capillary after cooling, no repeated manual scrubbing with metal tools;
  • Swing-out rotatable furnace body fully exposes the heating cavity, easy access to dead-angle residue without disassembly of the whole machine.
    This design eliminates cross-contamination between different formulas and reduces post-test cleaning time by over 60%.
  1. Wireless Remote Lifting & Intuitive Displacement Visualization
    Equipped handheld wireless remote controller to remotely lift/lower the upper driving head, inspecting sample filling status safely without touching high-temperature components. A vertical real-time displacement scale on the machine body clearly displays piston travel distance, helping operators judge residual sample volume inside the barrel at a glance during testing cycles.
  2. Stable Upper Moving Servo Loading Structure
    Adopts integral upper sliding drive frame instead of fixed lower cylinder design, dual dynamic balance pressurization ensures ultra-stable extrusion pressure without frame deflection under 5KN/10KN maximum load. Double closed-loop control of hardware and software realizes stepless adjustment of piston speed and extrusion force, supporting manual/automatic dual operation modes for flexible test scheme switching.
  3. Ultra-High Frequency Data Acquisition & Dual-Axis Curve Switching
    The built-in data collector reaches over 100 data sampling points per second, accurately capturing tiny inflection points of melt fracture and viscosity mutation. Supporting one-click switching between linear/logarithmic coordinate systems on PC software, users can observe flow curve characteristics from two analysis dimensions and freely set axis threshold parameters after testing completes.
  4. Expandable Modular Architecture, Flexible Customization
    The standard single-barrel host can be upgraded to twin-indenter dual-channel testing structure without replacing the main frame. Custom low-temperature refrigeration modules, ultra-high temperature heating units and special-diameter plungers are available to match low-viscosity elastomers and high-hardness filled engineering plastic
  5. Wear-Resistant Tungsten Carbide Capillary Die Kit
    Comes complete with four standard L/D ratio dies (1×5 / 1×10 / 1×20 / 1×40 mm) forged from tungsten alloy. The ultra-smooth inner bore resists abrasion from glass fiber, mineral filler and flame retardant additives, maintaining long-term dimensional stability for consistent test repeatability.

 

Complete Technical Parameter List

Parameter Item KR-722B Standard Specification
Max Extrusion Load Optional 5KN / 10KN
Working Temperature Range Ambient ~ 400℃
Heating Rate Adjustment 1~10℃/min, fast heating function available
Temperature Display Resolution 0.1℃, constant temp precision ±0.5℃
Pressure Test Scope 1~50MPa, full-scale accuracy ±0.5%FS
Pressure Resolution 0.1MPa
Piston Travel Speed 0.001 ~ 500 mm/min stepless regulation
Displacement Measurement Error ≤ ±0.5% Full Scale
Standard Plunger Size φ12mm (custom diameter supported)
Plunger Cross-Section Area 113.04 mm²
Matching Capillary Dies Φ1×5, Φ1×10, Φ1×20, Φ1×40 tungsten carbide
Rated Input Power Less than 1000W
Overall Machine Dimension 800 × 450 × 1650 mm

Five Standard Supported Test Modes

  1. Constant Velocity Shear Test
    Fixed piston speed to generate shear rate gradient, automatically plot shear stress-viscosity characteristic curves for material shear sensitivity analysis.
  2. Constant Pressure Shear Test
    Stable extrusion pressure output, detect melt flow rate variation under fixed load, suitable for simulating low-speed extrusion production conditions.
  3. Step Variable Shear Rate Test
    Multi-stage automatic speed switching, capture critical melt fracture point and minimum flow threshold of polymer melts.
  4. Temperature Gradient Scanning Test
    Continuous temperature rising program, track viscosity change trend as temperature increases to determine optimal processing temperature window.
  5. Constant-Temperature Pressure Sweep Test
    Maintain fixed barrel temperature while adjusting extrusion force, measure material softening temperature and initial flow pressure index.

Standard Full Test Operation Steps

  1. Equipment Preheating & Die Installation
    Mount target tungsten carbide capillary die inside the swing-out furnace, lock the heating cavity and set target temperature on control software, stabilize thermal field for 20 minutes.
  2. Sample Filling Preparation
    Dry granular polymer to remove moisture, evenly fill the barrel cavity, use wireless remote to lower the driving plunger and seal the feeding port tightly.
  3. Test Parameter Configuration
    Select corresponding test mode (constant speed / constant pressure etc.), set heating duration, piston travel limit and data recording frequency on matched PC analysis system.
  4. Automatic Extrusion & Real-Time Data Recording
    Start the test program; servo drive pushes molten material through standard die, the system continuously collects pressure, temperature and displacement data to generate real-time rheology curves.
  5. Curve Analysis & Report Export
    After testing finishes, switch linear/log axes as needed, mark key characteristic points such as melt fracture and minimum viscosity, save raw data and export editable PDF inspection reports.
  6. Automatic Auxiliary Cleaning Process
    Cool furnace body below 100℃, swing out the heating barrel, activate electric cleaning assembly to clear residual plastic, wipe die and plunger thoroughly before next batch testing.

Widely Applicable Industrial Scenarios

Engineering Plastic Manufacturing

Nylon, PBT, PC, PPS, glass fiber reinforced composite pellets; test high-temperature melt viscosity and extrusion stability for injection molding parameter optimization.

Modified & Masterbatch Enterprises

Color masterbatch, flame retardant filled plastics, recycled polymer raw materials; compare flow performance of different additive formulas.

Elastomer & Rubber R&D Labs

Thermoplastic elastomer, soft PVC, foaming polymer materials; analyze low-shear fluidity and extrusion swell properties.

New Energy Material Institutes

Lithium battery binder, high-temperature insulating polymer, conductive composite raw materials; high-shear rheology performance research.

Third-Party Testing & University Labs

Standard compliance testing per ISO 11443 and ASTM D3835; polymer rheology teaching experiments and new material formulation screening.

Standard Factory Delivery Package

  1. KR-722B automatic cleaning capillary rheometer main aluminum alloy frame host
  2. 5KN/10KN servo upper sliding drive assembly + wireless remote controller
  3. Rotatable heating furnace barrel + electric auxiliary cleaning device
  4. Complete set of four tungsten carbide standard capillary dies
  5. Industrial control computer + dedicated rheology analysis software U disk
  6. High-precision pressure & temperature sensing modules
  7. Complete cleaning tools, spare plunger and sealing accessories
  8. Multilingual operation manual complying with international rheology standards
  9. Factory calibration inspection qualification certificate

Capillary Rheometer

Global After-Sales & Distributor Support

We provide one-on-one remote operation training and multi-mode test parameter debugging guidance, with long-term stable supply of tungsten carbide dies, servo motors and heating tubes. Custom 60Hz overseas power conversion, low-temperature (-50℃) and ultra-high temperature (500℃) upgraded versions are available for bulk orders. Exclusive regional agent policies include priority production scheduling, OEM private brand customization and full HD product marketing image resources.

Product Image Overlay Text

Main Banner Title: KR-722B Auto Cleaning Capillary Rheometer ISO ASTM Certified

Control Panel Tags: MODE SELECT / TEMP SET / SPEED ADJUST / CURVE SWITCH / REPORT PRINT

Feature Overlay Tags: Swing-Out Furnace + Electric Cleaner / Wireless Remote Control / 5 Test Modes / Expandable Twin Barrel / Tungsten Carbide Dies

Safety Operation Tip: Fully Cool Furnace Before Activating Automatic Cleaning Device

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KR-722B Automatic Cleaning Capillary Rheometer

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Opening Hours

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Weekend – Closed

Address

Wentang, DongCheng District 523000, Dongguan City, Guangdong Province, PR China