The pallet flexure test is a test method that evaluates the ability of a pallet to withstand bending stress. In the process of logistics and transportation, pallets often need to withstand different directions and degrees of bending stress, so it is very necessary to test the bending resistance of pallets. This article will introduce in detail the methods, equipment, and standards of pallet bending test, as well as the analysis and interpretation of test results.
First, the method of pallet bending test.
The pallet flexure test is usually tested using the three-point flexure method. The specific steps are as follows:
1.Place the tray on the test bench and adjust the position of the tray so that it aligns with the centerline of the test bench.
2.Loading blocks are placed on pallets, and the dimensions and weight of the loading blocks should meet the requirements of the relevant standards.
3.The loading device is used to apply vertical downward pressure to the loading block, causing the pallet to bend and deform in the mid-span position.
4.The deflection value and load-bearing capacity of the pallet at maximum pressure are recorded, and the deformation of the pallet is observed.
2. Equipment for pallet bending test.
The pallet bending test requires the use of professional test equipment and testing instruments, mainly including the following:
1.Pallet Bending Tester: A test device specifically designed to test the bending capacity of pallets, providing stable pressure and span with high-precision measurement and documentation.
2.Loading block: a device for applying pressure on a pallet, the dimensions and weight of which should meet the requirements of the relevant standard.
3.Manometer: Used to measure the pressure exerted by the loading block, with high accuracy and stability.
4.Measuring ruler: used to measure the deflection value of the pallet, which needs to be highly accurate and stable.
3. The standard of pallet bending test.
Relevant national and industry standards should be followed when performing pallet bending tests to ensure the accuracy and reliability of test results. Common pallet flexure test standards include:
1.GB T 4995-2005 Test method for flexural strength of general flat pallets for intermodal transport.
2.ISO 14985-2004 Packaging Cargo Units Test Method for Flexural Strength of Cargo Loading Units.
3.ASTM D7323-18 Test Method for Flexural Strength of Flat Pallet Stacking and Jacking Systems.
4. Analysis and interpretation of test results.
After the pallet bending test, the test results need to be analyzed and interpreted to evaluate whether the bending capacity of the pallet meets the requirements of the relevant standards. Key analytical metrics include:
1.Deflection value: The deflection value of the pallet when it is subjected to the maximum pressure should meet the requirements of the relevant standards, and excessive deflection value will affect the service life and stability of the pallet.
2.Bearing capacity: The carrying capacity of the pallet when it is subjected to the maximum pressure should meet the requirements of the relevant standards, and the carrying capacity is too low to affect the safety of the pallet.
3.Deformation: Observe the deformation of the pallet, if the pallet is severely deformed or broken when it is under pressure, it means that the pallet has insufficient bending resistance.
Based on the results of the analysis and interpretation, the bending resistance of the pallet can be rated and guidance and recommendations can be provided for subsequent pallet design and production. For example, if the test results show that the bending capacity of the pallet is insufficient, you can adjust the material, thickness, structure and other parameters of the pallet to improve its bending resistance.
In conclusion, the pallet bending test is one of the important means to evaluate the performance of the pallet. Through scientific test methods, accurate test equipment and strict standard requirements, accurate test results can be obtained, which provides strong support for the design, production and application of pallets.
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