The QR-ZGY Resin Sand High-Temperature Performance Tester is a specialized and advanced instrument designed to evaluate the thermal and mechanical properties of resin-bonded sand under extreme temperature conditions. By accurately simulating foundry casting environments, the QR-ZGY enables researchers, quality inspectors, and production engineers to assess the compressive strength, thermal stability, restricted expansion force, and expansion rate of resin sand materials. These measurements are critical for understanding how resin sand will behave during metal pouring, mould preparation, and high-temperature processing.

With its precise measuring capabilities, user-friendly operation, and durable construction, the QR-ZGY is an indispensable tool in the foundry industry, metallurgical research, materials science laboratories, and university research centers.

1. Testing Indicators and Their Significance

The QR-ZGY is capable of evaluating four essential high-temperature performance indicators of resin sand, each offering valuable insights into casting and moulding processes:

a. High-Temperature Compressive Strength

• Definition: The immediate compressive strength measured after maintaining resin sand samples at high temperatures for a period of time.

• Importance: Reflects the sand’s ability to withstand pressure during the pouring stage.

• Testing Method: The sample is heated to a specific temperature, held for a period of time, then subjected to pressure until fracture. The maximum load value is recorded to calculate compressive stress.

• Application: Ensures moulds maintain integrity and shape while withstanding molten metal during casting.

b. Conditional Thermal Stability (High-Temperature Duration)

• Definition: The length of time resin sand retains its strength under specific temperature and load conditions.

• Importance: Indicates the resistance of resin sand against thermal decomposition and mechanical effects from molten metal.

• Testing Method: A constant load is applied while the sample is placed in a preheated furnace. Timing begins until the sample collapses.

• Application: Helps evaluate binder durability and ensures stable casting conditions for improved product quality.

c. Restricted Thermal Expansion Force

• Definition: The internal stress generated when a specimen is prevented from expanding at high temperature.

• Importance: Excessive expansion force can cause defects such as cracks or deformation in castings.

• Testing Method: The specimen is held at constant length in a furnace, and the force required to maintain the length is recorded.

• Application: Critical for predicting casting stress behavior and preventing mould failures.

d. High-Temperature Expansion Rate

• Definition: The percentage change in specimen size after free expansion at elevated temperatures.

• Importance: Provides insight into the volumetric stability of resin sand under casting conditions.

• Application: Ensures dimensional accuracy and reduces the risk of casting defects caused by uneven thermal expansion.

2. Technical Specifications

The QR-ZGY tester is designed to achieve high accuracy and wide testing range to meet the requirements of industrial and research applications.

• High-Temperature Compressive Strength Range: 0–4.5 MPa (Accuracy ±1% FS)

• Restricted Thermal Expansion Force Range: 0–500 N (Accuracy ±1% FS)

• Conditional Thermal Stability Range: 0–300 s (Accuracy ±1 s)

• High-Temperature Expansion Rate: 0–10%

• Operating Temperature Range: 500–1200 °C

• Sample Size: Ø12 × 20 mm (Other sizes possible; diameter ≤ 25 mm; height adjustable via limit switch)

• Working Voltage: AC 220 V / 50 Hz

Additional Components:

• Resin sand thermal stability test mould set

• Laminated sand prototype for high-temperature sample preparation

3. Key Features

1. Comprehensive Testing Capabilities

   • Accurately evaluates all critical high-temperature properties of resin sand in one system.

2. Advanced Heating System

   • Provides stable and uniform heating within a range of 500–1200 °C for realistic casting simulations.

3. High-Precision Sensors

   • Integrated load and temperature sensors ensure accurate and repeatable test results.

4. Durable and Versatile Sample Handling

   • Accommodates different sample sizes, with adjustable limit switches for flexible testing.

5. User-Friendly Operation

   • Intuitive design and clear parameter settings make the tester suitable for both professionals and students.

6. Efficient Data Measurement

   • Quick response time, accurate readings, and reliable repeatability for industrial and research testing needs.

4. Advantages of QR-ZGY

• Realistic Simulation of Casting Conditions
  Tests replicate the extreme thermal and mechanical conditions that resin sand encounters in foundry operations.

• High Accuracy and Reliability
  With ±1% full-scale measurement accuracy, results are consistent and trustworthy for quality assurance.

• Versatility
  Capable of evaluating compressive strength, stability, expansion force, and expansion rate in one instrument.

• Improved Casting Quality
  By understanding resin sand performance, defects such as cracks, deformation, and thermal collapse can be minimized.

• Durability and Long Service Life
  Designed for continuous use in both industrial and academic laboratories.

5. Applications Across Industries

The QR-ZGY Resin Sand High-Temperature Performance Tester is used in multiple sectors:

• Foundry Industry

  • Optimizing moulding sand formulas to enhance casting quality.

  • Ensuring reliable mechanical and thermal properties during metal pouring.

• Casting and Metallurgical Research

  • Studying thermal decomposition rates of resin binders.

  • Developing new sand materials for advanced casting applications.

• Quality Control Laboratories

  • Routine testing to ensure compliance with international standards.

  • Preventing casting defects through proactive material analysis.

• Universities and Research Institutions

  • Training students in materials science, foundry engineering, and metallurgy.

  • Supporting academic projects and experimental research on sand properties.

6. Why Choose QR-ZGY?

The QR-ZGY stands out for its precision, versatility, and reliability. By combining multiple testing indicators into one system, it reduces the need for multiple instruments, making it cost-effective and efficient.

Key reasons to choose QR-ZGY:

• Accurate high-temperature testing results.

• Wide application across research, quality control, and industrial production.

• Comprehensive testing functions in one instrument.

• Durable construction for long-term use.

• Enhances foundry efficiency and reduces casting defects.

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• Resin Sand High-Temperature Performance Tester

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• Sand Expansion Rate Measuring Instrument

• Foundry Quality Control Equipment

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Conclusion

The QR-ZGY Resin Sand High-Temperature Performance Tester is a powerful and reliable instrument that provides critical insights into the thermal and mechanical behavior of resin sand under casting conditions. By accurately measuring compressive strength, conditional thermal stability, restricted expansion force, and expansion rate, it enables industries and research institutions to optimize sand formulations, improve casting quality, and prevent production defects.

With its advanced heating system, precise measurement accuracy, and versatile application, the QR-ZGY is the ideal solution for foundries, laboratories, and universities seeking high-performance sand testing equipment.