Edge Crush Tester: Formula, Calculations, and Best Practices

Today’s blog revolves around the nitty-gritty of Edge Crush Tester, the calculation method, the current application, specifications for the most updated Edge Crush Test Machine that offers formulae and tips regarding the upkeep of the same, and much more. It is a guide meant especially for professionals such that their learning becomes sharp for better testing.

Manufacturers often use the Edge Crush Test to evaluate the strength of their cardboard packaging materials. The higher the ECT, the stronger the material, which means it can bear more weight without collapsing under pressure. This is important so that packages are not damaged during shipping and handling.

Edge Crush Test Formula

The Edge Crush Test Formula determines how strong the material can be from the amount of force applied to it before deforming. Though the formula isn't complicated at all, the factors involved may vary. There is a typical formula for computing the Edge Crush Test, and it is as follows:

ECT = Force applied (N) / Sample width (mm)

Where:

F stands for applied force which is measured in terms of Newtons,
L the length of the sample (mm)
D is the depth of the sample in millimetres.

The result is measured in units of N/mm, meaning Newtons per millimetre, which is the amount of compressive stress the board can take before it fails.

Important Specifications of the Edge Crush Test Machine

For such a test, there is an Edge Crush Test Machine which particularly makes the test. To offer accurate results, good reproducibility, and easy interpretation, such modern machines are also equipped with advanced features. Here are some of the key specifications you should expect from an edge crush tester:

• Load Cell Capacity: 100 Kgf
• Display: LED (Digital)
• Accuracy: ±2% at full load (with master load)
• Least Count/Resolution: 0.01 Kgf
• Power: 220V, Single phase, 50 Hz
• Test Speed: 12.5± 2.5 mm/min

Highlights :

• Safety Switch: Upward & Downward Limit Switches  
• Material: Mild Steel
• Finish: Powder coated with grey & Blue combination finish and bright chrome/zinc plating for corrosion corrosion-resistant finish
• Dimensions: 600x500x863 mm

Edge Crush Test Chart

After the edge crush test, the results obtained are usually presented in a chart for comparison purposes, contrasting the strength of the material against the requirement of the industry. The Edge Crush Test Chart acts as the basis for determining if the material achieves the specified strength requirements for packaging.

A regular chart showing corrugated board grades of ECT shall be available. This indicates the different grades of strength and helps in determining at what level the material stands for ease of judgment of whether or not the improvement or modification is necessary.

Edge Crush Test Calculator

An Edge Crush Test Calculator can simplify the process by automatically computing the results based on input parameters. While the formula above gives the theoretical calculation, most modern testing systems incorporate an embedded calculator to automatically do the calculation; this saves time while providing consistent results. Such calculators take in sample dimensions, applied force, and any specific test parameters entered into the system.

Manufacturers can easily check a number of packaging materials, compare results with standard industry values, and even ensure that it satisfies all conditions for packing strength with an ECT Calculator.

Dos and Don'ts of Edge Crush Tester

To guarantee accurate results and extend the life of your Edge Crush Test Machine, it is important to use it according to proper operation procedures. Below are some dos and don'ts when handling an ECT machine:

Do's:

1. Calibrate Regularly: Make sure the machine is calibrated regularly with standard calibration weights. Calibration will ensure that your machine will always give accurate results.
2. Proper sample preparation. The corrugated board sample shall always be prepared according to specifications. Edges should be clean, straight, and free from defects.
3. Monitor the test speed according to the material specification, and make sure that the test simulates actual conditions.

Don'ts:

1. Overload the Machine: Avoid applying excessive force beyond the machine's specified capacity, as it can damage the load cell or the clamping mechanism.
2. Use Deformed Samples: Never use twisted, folded, or otherwise distorted samples. The test will not work right if such a thing occurs.
3. Neglect Software Upgrades: If the machine one is using has software that can run to analyze the tests, this machine should be regularly updated with its software. Failure to update one's software results in test inaccuracies and inefficient test reporting.
4. Skip Safety Procedures: Always follow the safety guidelines provided by the manufacturer. This would include proper safety gear usage and ensuring that the machine is running within safe parameters.

Maintenance Tips for Edge Crush Test Machines

The maintenance of the Edge Crush Test Machine is critical for its longevity and accuracy. The following are some critical maintenance tips:

Inspect Load Cells: Load cells must be inspected and cleaned frequently. Dirt or any kind of contamination on the load cell causes incorrect measurements.

Lubricate Moving Parts: Lubricate moving parts like clamps and slides if your machine includes those. Friction and wear can be avoided when they are lubricated occasionally.

Check Pneumatic Components: Those machines that utilize pneumatic controls must have the pneumatics checked for air leaks, which can impact clamping and thus affect the accuracy of the result.

Software Upgrades: Ensure that the software being used within your Edge Crush Test Machine maintains the latest upgrades. Quite a number of manufacturers carry out periodic updates for better efficiency and accuracy.

Calibration and Testing: Be calibrated by means of known standards and periodically check for drift in test results. It is recommended to run test samples at least once a month to ensure accuracy over time.

FAQs

How do I check my edge crush test?

Using the result, you can determine whether it passes or fails by using the Edge Crush Test Machine by measuring the force with which the material starts deforming, then applying the test formula or software to determine how strong the material is.

How do you calculate the edge crush test?

The ECT formula is:
ECT = Force applied (N) / Sample width (mm)

Where F is the applied force, L is the length, and D is the depth of the sample. The result would give a measure of the compressive strength of the material.

With precise machines, formulas, and proper maintenance, businesses can optimize their packaging materials to meet the demanding standards of the logistics and supply chain industries.

Phone: +91 9210 903 903

Mail: info@prestogroup.com