If the load-carrying ability or the stiffness of a plastic part needs to be improved, it is necessary to either increase its sectional properties or change the material. Sometimes, it may be enough to change the material grade, for example using a higher glass fiber content. If that doesn’t suffice or isn’t desired for other reasons, increasing the sectional properties is often the solution.
In many cases, the simplest way to improve the sectional properties is increasing the part’s wall thickness. However, as is mentioned here, this has its limitations. Additional reinforcement can be obtained by adding corrugations or placing ribs perpendicular to the parts wall. Adding corrugations typically has a smaller impact on part weight and cooling time, but adding ribs has a bigger potential in terms of increasing the stiffness. Moreover, ribs allow for the facing or mating surface of a part to be smooth, which can be beneficial for aesthetic or functional reasons.