With the use of 3D-printed molds, maker Chris McCann shows a practical way to produce individual skateboard wheels yourself. The approach combines FDM printing, classic post-processing and the use of casting resin. The focus is on a three-part mold whose geometry is publicly available as an STL and STEP file under a Creative Commons license.
However, production is more complex than a simple printing process. The visible layer lines in FDM prints require the inside of the mold to be carefully sanded and smoothed. Before casting, PETG cores are first printed, which serve as the stable inner workings of the wheels. Alternatively, aluminum cores can also be produced using a lathe. The mold is then treated with a release agent such as Vaseline before the urethane resin is poured in. The material completely fills the space around the core and forms the running surface of the wheel once it has hardened.
A critical step is the removal of trapped air bubbles. McCann uses a pressure chamber for this, but emphasizes that vacuum degassing can also work – depending on the resin formulation used. Only after complete curing is the mold opened and the finished component removed.
The process is not only suitable for customizing skateboards, but also demonstrates how additive manufacturing can be combined with casting techniques.
Metal Binder Jetting: The Key to Efficient Tool Manufacturing? - Exclusive Insights from INDO-MIM
Fill out the form and get instant access to an exclusive webinar on HP's Metal Binder Jetting 3D printing technology with exciting insights from INDO-MIM.Subscribe to our Newsletter
3DPresso is a weekly newsletter that links to the most exciting global stories from the 3D printing and additive manufacturing industry.
