This test is performed on tires, soles, conveyor/drive belts and other samples. In actual service, tires, conveyor and transmission belts are subject to a lot of stress.
These materials should be resistant to wear and can withstand abuse during their service lives. For evaluating rubber floor coverings and hoses, the DIN Abrasion test can also be used.
These materials can be tested by the DIN Abrasion Tester before being made into mass quantities. Quality materials that are durable are also an indicator of higher quality. The DIN Abrasion test does not give an exact indication of the rubber material’s wear resistance.
Also check– Akron Abrasion Tester
Description of the Mechanism
The Rubber Abrasion tester is a simple contraption that only has a few parts.
It includes a drive system, a rotating cylindrical drum and a test piece holder.
Switches are included in the drive system that allow you to turn on and off the machine. Some testers include a counter that shows how many rotations the drum has made. Some testers also include reset and adjust switches.
The cylindrical drum measures 20 inches in length and has a diameter of 5.91inches. The entire length of the cylindrical drum is covered by an abrasive sheet. The abrasive medium used is grit 60 Corundum and is attached to the drum using strong adhesive tapes. The abrasive sheets will remove material from test pieces and provide a mean mass loss (mg), of 180 to 220mg.
Attached to a swivel arm or sledge, the test piece holder can be used as a stand-alone device. You can also attach calibrated weights to the test piece holder. These weights exert a downward force on the cylindrical drum and test piece.
The drum’s length can be extended in a lateral manner by the test piece holder. The cylindrical drum can rotate simultaneously with it.
Others machines will have a fixed specimen tray that is pressed against the rotating drum.
A tray is located at the bottom and collects the rubber abrasion test debris.
Rubber Abrasion Testing Procedure
The operator prepares the specimen by using a test-piece cutting tool. The specimen must be cylindrical in shape and fit into the test piece holder.
Before the testing can begin, the operator must clean the adhesive sheet. This is done to ensure uniform testing.
As the cylindrical drum rotates, the operator turns on the machine. The operator uses a brush and turns the handle to scrub the surface. It will also take out any debris that was left over from previous tests. Sometimes, the operator may use a safety blowgun to remove the debris.
Now, the operator raises the swivel arms to place the test piece in the holder. Finally, he or she secures it in its place. If necessary, the operator may add calibrated weights. Test pieces may require more weight in order to exert a greater force on the rotating drum. Once the abrasive sheet has been cleaned and the test piece is in its place, testing can begin.
The operator starts the test by moving back the test piece holder to its original position. After the test piece holder is set, the operator turns on the machine. The rotating drum then moves the test piece. Operators must make sure that the tester piece is not vibrating in its holder. Unstable results could be caused by vibrations.
After the 40 meter abrasion distance has been reached, the machine will stop. This takes approximately 84 revolutions to rotate the cylindrical drum.
A series of tests is performed by the operator using both a test rubber compound as well as a standard rubber. Operators also need to test rotating and non-rotating test items.
These Standards list the exact number and types of tests the operator must perform. Abrasion Standards include instructions on how to prepare test pieces.
The operator measures the volume of the standard compounds and the loss during the test after the test is complete. The operator uses this information to calculate the abrasion resistance indicator. A lower volume loss value means that the index is more resistant to wear. A lower index indicates a greater resistance to rubber abrasion.
These test results can be used by rubber product designers, users, and manufacturers. The Rubber Abrasion test is a reliable indicator of material quality and performance. The data can be used by designers to aid in their research. The data can be used to verify the product’s effectiveness. The test results can be used by manufacturers to improve their products. Consumers will be reassured that the quality of the materials is superior.
