KR-705 HDT & Vicat Softening Point Combined Tester
ASTM D1525 ASTM D648 Temperature Deflection Vicat Softening Test Apparatus
This machine is to adapt to the rapid development of plastics industry and improve the level of research and testing of materials, using the latest international and national standards;
Product Details：
Product Introduction
The KR-705 integrated thermal performance tester is a dual-function lab instrument dedicated to measuring Heat Deflection Temperature (HDT under bending load) and Vicat Softening Temperature (VST) of thermoplastics, hard rubber, composite and insulating polymer materials… It heats specimens in a constant-temperature circulating medium bath under standardized static load, recording the critical temperature when specified deformation or needle penetration depth occurs, which acts as core index to evaluate material heat resistance and high-temperature dimensional stability for product formulation and production process optimization.
This test bench fully complies with global mainstream inspection standards including GB/T 1633, GB/T 1634, ISO 75, ISO 306, ASTM D648, ASTM D1525. Equipped multi-station parallel test racks and closed-loop PID temperature regulation system, it is widely deployed in modified plastic factories, wire cable labs, new energy insulation material R&D institutes and CNAS accredited third-party testing centers.
Product
Core Product Competitive Advantages
- Dual Test Mode Interchangeable Frame Design
Integrated HDT bending fixture and Vicat needle indent assembly on one test stand, users quickly switch two test methods by replacing pressing accessories without extra equipment investment. Two standard support spans (64mm / 100mm) match international specimen dimensions, compatible with thin sheets, thick engineering plastic slabs and plastic pipe test strips.
- High Uniform Circulating Oil Bath Heating System
Full surrounding spiral heating module paired with double silent stirring motors eliminates local hot/cold spots inside the medium tank. Temperature fluctuation controlled within ±0.2℃, linear heating rate adjustable from 0.5~120℃/h to meet slow scanning and accelerated aging test schemes, max working temperature up to 300℃ to cover high-temperature resistant polymers.
- High-Precision LVDT Displacement Sensing Unit
Ultra-sensitive displacement sensor with 0.001mm resolution captures tiny specimen deformation in real time, accurately locking critical temperature when deflection reaches 0.34mm (HDT) or needle sinks 1mm (Vicat). Built-in automatic zero calibration function before each test eliminates mechanical zero drift error of the pressing rodMade-in-Ch….
- Standard Graded Load Matching Kit
Complete set of calibrated standard weights covers all standard load specifications:
- Vicat test: 10N / 50N two mainstream loads
- HDT bending test: 1.82MPa / 0.45MPa / 0.18MPa three stress grades
All weights undergo factory mass calibration to guarantee load accuracy, no manual weight conversion calculation required.
- Touch Intelligent Full-Automatic Control System
7-inch industrial touch screen pre-stores standard test programs for plastic, rubber and pipe materials. Real-time synchronous display bath temperature, specimen deformation value and heating curve; system automatically records critical softening/deflection temperature once threshold value is triggered, supports data storage, curve overlay comparison and one-click PDF report export.
- Multi-Layer Safety & Low-Maintenance Structure
Over-temperature automatic power-off protection prevents medium overheating aging; sealed cabinet with oil mist exhaust fan avoids volatile heat transfer medium corroding control components. Test rack supports electric automatic lifting to simplify specimen loading and cooling operations, thick anti-rust stainless tank easy to clean after daily testing.
Complete Technical Parameter Table
| Parameter Item | KR-705 Standard Specification |
|---|---|
| Dual Test Functions | HDT heat deflection / Vicat softening point |
| Working Temperature Scope | Ambient ~ 300℃ |
| Temperature Control Precision | ±0.2℃, resolution 0.1℃ |
| Adjustable Heating Rate | 0.5 ~ 120 ℃/h stepless |
| Displacement Measurement Accuracy | 0.001mm LVDT sensor |
| Standard Test Spans | 64mm / 100mm interchangeable |
| Standard Test Loads | Vicat:10N,50N; HDT:0.18/0.45/1.82MPa |
| Optional Test Stations | 3-station / 6-station parallel rack |
| Heat Transfer Medium | High-temperature resistant silicone oil |
| Control Terminal | 7-inch color touch screen + data storage |
| Input Power | AC220V single phase |
Standard Complete Test Workflow
- Equipment Preheating & Program Setup
Inject qualified heat transfer oil into the bath tank, power on and start stirring circulation; select HDT or Vicat test program on touch panel, set target heating speed and deformation threshold value.
- Specimen Clamping & Load Assembly
Cut raw material into standard size test strips, mount on corresponding support span; install Vicat needle or HDT pressing beam, hang matched calibrated weights to apply standard static load, reset displacement sensor zero point.
- Immersion & Automatic Heating Test
Lower the test rack fully into the circulating oil bath, start automatic heating program. The system continuously tracks temperature and deformation data in real time.
- Critical Temperature Auto Capture
When specimen deformation hits standard threshold, the system automatically marks and records HDT/Vicat critical temperature, suspends heating prompt for operator observation.
- Data Analysis & Report Export
After test completion, call stored curves on the screen to compare multiple batches of material heat resistance data, export and print standardized inspection reports.
- Rack Lifting & Post-Test Cleaning
Lift test rack out of oil bath to cool specimens, wipe residual oil on fixtures and pressing accessories, close heating function and cut power supply for daily storage.
Wide Industrial Application Scenarios
Plastic Pipe Manufacturing
HDPE, PP, PVC water/gas pipeline raw materials; test long-term underground high-temperature deformation resistance, optimize anti-thermal deformation additive formula.
Engineering Plastic Factories
PA, PC, PPS glass fiber reinforced composite pellets; evaluate high-temperature dimensional stability for automotive and electronic structural parts.
Wire & Cable Material Labs
PE, XLPE insulating sheath materials; comply GB/T 2951 aging standards to judge long-term service heat resistance of wiring products.
Rubber & Elastomer R&D
Hard rubber, TPE high-temperature resistant blends; screen softening temperature to avoid thermal creep under working load.
Third-Party Certification Institutions
Carry out standardized thermal compliance testing for export products, issue internationally recognized test data for factory delivery and market access filing.
Standard Factory Delivery Kit
- KR-705 main circulating oil bath host with touch control system
- Interchangeable HDT bending fixture + Vicat indent needle assembly
- Full set calibrated standard graded weight kit for all test loads
- High-precision LVDT displacement detection module
- 3/6 station parallel stainless steel test rack (configurable)
- Electric auto-lifting test support frame
- Oil mist exhaust device and medium cleaning accessories
- Multilingual operation manual aligned with ISO & GB thermal standards
- Factory temperature & load calibration qualification certificate
Global Distributor & After-Sales Support
We provide one-on-one remote test parameter debugging and operation training, with long-term stable supply of spare Vicat needles, heating tubes and displacement sensors. Custom low-temperature refrigeration auxiliary modules and 60Hz overseas power versions are available for bulk orders. Exclusive agent policies include priority production, OEM private brand customization and full HD product marketing image resources.
English Overlay Text For Product Pictures
Main Banner Title: KR-705 HDT Vicat Combined Thermal Tester ISO ASTM GB Compliant
Control Panel Tags: TEST MODE / HEAT RATE SET / CURVE MONITOR / DATA SAVE / REPORT PRINT
Feature Overlay Tags: Dual HDT/Vicat Function / ±0.2℃ Precise Temp / 0.001mm Displacement Sensor / Multi-Station Parallel Test / Auto Load Calibration
Safety Operation Tip: Avoid Touch High-Temperature Oil Bath During Running Test
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