Understanding the Working Principle of the Edge Crush Tester

In the rigid paper and packaging industry, ensuring the durability of materials used in packaging is essential to prevent damage to the packaged items and maintain consumer satisfaction. One crucial test for assessing the strength of packaging materials is the edge crush test, which evaluates the durability of material edges. To assist manufacturers in this endeavor, the Presto Group offers the Edge Crush Tester, equipped with advanced technology to ensure accurate results consistently. Let's delve into the working principle of this essential lab testing instrument:

Working Mechanism of the Edge Crush Tester

The Edge Crush Tester employs a three-way testing technology to evaluate the strength of material edges. Here's how it operates:

1. Testing Methodologies:

   • Edge Crush Test: Evaluates corrugated sheets of 3-5 plies.
   • Flat Crush Test: Assesses corrugated sheets of 5-7 plies.
   • Ring Crush Test: Determines the strength of materials under radial pressure.

2. Sample Preparation:

   • The specimen is cut according to the specific testing methodology.
   • It is securely clamped between the grippers of the edge crush tester to prevent movement during testing.

3. Testing Procedure:

   • The specimen is positioned with the edge side facing upwards towards the upper jaw.
   • Motorized compression plates apply a uniform compressive force to the specimen at a speed of 12.5mm per minute.
   • The circular lead screw ensures smooth movement of the compression plate.
   • The microprocessor-based display indicates the load value and deformation caused during testing.

4. Result Calculation:

   • Once the test is complete, the load value and deformation data are recorded.
   • The edge crush strength is calculated using a simple formula: weight per linear inch (lbs/linear inches).

Key Features of the Edge Crush Tester

The Edge Crush Tester is equipped with several features to facilitate accurate and hassle-free testing:

1. Multiple Fixtures/Grippers: Allows for testing using three different fixtures, accommodating various testing requirements.

2. Limit Safety Switch: Prevents overtravel of the motorized compression, ensuring operator safety and instrument protection.

3. Microprocessor-Based Display: Provides precise results and enables easy data analysis and comparison with previous records.

4. Robust Construction: Stainless steel and mild steel construction with rustproof coating ensure durability and longevity of the instrument.

5. Feather Touch Controls: Promote single-handed operation, enhancing user convenience and efficiency.

FAQs About Edge Crush Tester

Q: What is the difference between the bursting test and the edge crush test? A: While both tests evaluate material strength, they differ in methodology. The bursting test measures resistance to rupture under pressure, while the edge crush test assesses edge resilience against compression forces.

Q: How is edge crush strength measured? A: Edge crush strength is calculated using the weight per linear inch formula (lbs/linear inches) based on test results.

Q: Where can I purchase an edge crush tester? A: You can purchase the Edge Crush Tester directly from Presto Group via our website or by contacting us via phone or email.

In conclusion, the Edge Crush Tester is an indispensable tool for manufacturers in the packaging industry, enabling them to assess the durability of packaging materials accurately and efficiently. With its advanced features and precise testing capabilities, it ensures the production of high-quality packaging materials that meet industry standards and consumer expectations.