Polyurethane wheels in dynamic applications experience cyclic loading and unloading. When this occurs, the mechanical energy is converted into heat energy which causes the parts to heat up. This article will introduce brief ways to decrease the chance of polyurethane tread blowout in your polyurethane wheels application.
Polyurethane wheels and rollers in dynamic applications can experience blow out if they generate too much heat from the cyclic loading and unloading. To prevent this, a greater durometer elastomer can be used, the polyurethane wheels can be re-designed, or a high performance urethane can be used. The solution will depend on the application and the budget of the project.
1. Harder Durometer Material
Generally when determining the polyurethane wheel, the load-bearing capability is the first consideration. Less than five percent deflection is recommended to prevent the polyurethane wheel or roller from experiencing blow out. As a rule, harder urethanes will deflect less than softer ones. Therefore, a polyurethane wheels with a greater durometer can be specified for applications with heavier loads.
2. Increaseing diameter or width of wheels is also a good method to prevent polyurethane wheels failures. This can be done by adding additional polyurethane wheels or rollers to the overall design to spread the load.
3. Change the Type of Polyurethane
Different specifications of the polyurethane have different performance. So choosing appropriate polyurethane is necessary. If the polyurethane needs to be softer and the polyurethane wheel cannot be re-designed, so changing the type of polyurethane is the method proposed.
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