GenRebound – Vertical Rebound Resilience Tester

Rubber compound resiliency is examined via GenRebound. The machine must be positioned horizontally, with the plunger lifted to a predetermined height. After that, the plunger is let go onto the sample for a specific amount of impact.

Here is how you properly maintain NextGen’s Vertical Rebound Resilience Tester – GenReboun:

1. Check the verticality of the hammer guide before the test.
2. Check if the machine is level before the test.
3. The instrument can't be lubricated, otherwise, it will affect its performance.
4. Keep the appearance of the machine clean and organized.
5. Please operate and maintain by professionals only.

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The ISO standard known as ISO 10012:2003, Measurement management systems - Requirements for measurement processes and measuring equipment, lays out general requirements and offers instructions for the management of measurement processes and metrological confirmation of measuring equipment used to support and demonstrate compliance with metrological requirements. In order to ensure that metrological standards are met, it describes the quality management requirements of a measurement management system that can be utilized by an organization that performs measurements as part of its overall management system.

It is not intended for ISO 10012:2003 to be used as a prerequisite for proving compliance with ISO 9001, ISO 14001, or any other standard. The use of ISO 10012:2003 as input for fulfilling the needs of measurement management systems in certification operations is open to interested parties.

There are further standards and guidelines for specific factors influencing measurement outcomes, such as the specifics of testing procedures, staff competency, and interlaboratory comparisons.

The requirements of ISO/IEC 17025 are not to be replaced or supplemented by ISO 10012:2003.

NextGen’s Vertical Rebound Resilience Tester – GenRebound complies with ISO 10012 standard

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• Prepare the test piece:
  1. Determination of the position of the test piece: Select the test piece from the dispersed position of the same batch of materials.
  2. Test piece production: Cut the test piece into two pieces of standard disc core test piece with a thickness of 12.5mm and a diameter of 28mm.
• Operation steps:
  1. Confirmation before operation:
     1. Check if the machine is level. If the machine is not in the horizontal state, adjust the machine to the level through the adjustable feet.
     2. Confirm that the slider is vertical.
  2. Clamp the test piece: Loosen the fixing screw of the machine stand and move the test piece up to the position where the rubber test piece can be placed. After pressing the rubber, lock the fixing screw.
• Start the test:
  1. Move the hammer along the slide bar to the highest point, use the trigger to fix the hammer.
  2. Press the lever, the hammer will naturally fall to the test piece along the slide bar and the height will be the rubber rebound height.

Note:

• The same test piece is tested six times, the first three times are predicted first, no need to record the value, and then the adjustment handle is locked.
• After predicting three times, test again three times and record the rebound heights h1, h2, h3.
• Only when the test piece is clamped, the test can be carried out, otherwise the hammer and the base will be damaged.
• Recording method: The bounce height is read from the scale.

Note:

• When reading, the line of sight should be perpendicular to the scale to avoid errors in the test results.
• When reading a value, generally retain 1 decimal place, and the second digit is rounded.
• The scale next to the slide bar of the machine, each scale is 4mm.
• Results Processing Take the average of the first three test results

Rubber Rebound Height (W)= (h1 + h2 + h3)/3

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The relationship or ratio between the energy that is returned and the energy that is impacted between a force, such as a dropped hammer, and the test specimen is known as rebound resilience. In order to determine whether your material is ready for its intended application, the energetic reaction to an impact, often caused by a hammer, is measured and then assessed in accordance with the goals and quality control requirements.

By measuring the vertical rebound of a dropped plunger with a specified mass and shape, the ASTM D2632 test determines the impact resilience of solid rubber. Then, resilience is calculated as the difference between the hammer's drop height and rebound height. Again, variations in temperature and the depth of the plunger's entry are sensitive to the resilience measurement.

Although ASTM D2632 is used to create and compare materials, it is frequently inapplicable to the testing of end-use performance. Additionally, it does not apply to the testing of coated fabrics or cellular rubbers, yet it is suited for those types of tests.

NextGen’s Vertical Rebound Resilience Tester – GenReboun complies with ASTM D2632 standard

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Rubber compound resiliency is examined via GenRebound. The machine must be positioned horizontally, with the plunger lifted to a predetermined height. The measurements are based on hits four, five, and six. The test result is then determined by taking the average of the three (3) measurements. The equipment is very helpful in producing compounds that meet ASTM criteria for vibration or shock absorption.

Function of each component:

1. Scale, index: The rebound height of the main inspection materials.
2. Adjustable Handle: Adjust the position of the pointer.
3. Slider: The steering hammer acts as a guide.
4. Punching: Impact on the test piece.
5. Pole: Support the entire machine.
6. Pull rod: Start the hammer to test.
7. Horizontal foot: Adjust the level of the machine. When the bubble in the horizontal ball is in the center, the machine is in a level state.
8. Fixing screw: Adjust the height of the test piece holder to place the test piece.

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This test instrument was created using ASTM-D2632, ISO-10012, and other standard documents, and it is primarily used to measure the rebound height of hard rubber materials. It cannot be used to measure the rebound height of soft rubber or glued leather. In units are the test results. Although the test method can be used to identify and research materials, it cannot directly assess final performance.

Adaptive Vertical Rebound Using the free fall weight method, the tester evaluates the rubber materials' elasticity. Adjust the instrument's horizontal position first, and only after that elevate the drop weight to the desired height. Make sure the drop point is 14 millimetres from the test piece's edge when you set it down. The average of the fourth, fifth, and sixth rebound heights was recorded; the first three trials were not used.

NextGen's Vertical Rebound Resilience Tester machine uses the vertical free fall hammer method to observe its rebound height.

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This test apparatus was created using ASTM-D2632, ISO-10012, and other standard papers, and it is primarily used to measure the rebound height of hard rubber materials. It cannot be used to measure the rebound height of soft rubber or glued leather.

Installation:

• Operating environment conditions: The required temperature is (23 ± 2) ° C, and the humidity is (65 ± 5) RH%
• The instrument should be placed on a flat platform of 25cm x 15cm or more.

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Standard test method for Rubber Property Standard Test Method—Resilience By Vertical Rebound

This test procedure entails measuring the vertical rebound of a dropped mass in order to determine the impact resilience of solid rubber.

Cellular rubbers and coated fabrics cannot be tested using this test procedure.

Test Method D1054 provides a description of a common test procedure for rubber impact resilience and penetration using a rebound pendulum.

The values given in SI units should be taken as the norm. Parenthetical values are provided only for informational purposes.

If there are any safety concerns, they are not all claimed to be addressed by this standard. The user of this standard is responsible for establishing suitable safety and health procedures and determining whether any regulatory restrictions apply prior to using.

NextGen’s Vertical Rebound Resilience Tester – GenReboun complies with ASTM D2632 standard

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The scale on the Vertical Rebound tester is based on 4mm intervals (per section). This scale also indicates the percentage of height post bounce.

For example, if it bounces up to 30, the result is 30%.