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3D printed door opener

Corona-safe door opener 3D printed to last

3D printing has proved itself to be a great tool for innovation, prototyping and low volume end-use parts. Our partner, Materialise, designed a brilliant gadget for a no-hands door opener and shared the design files with the world. Anyone can now 3D print their own door opener to minimize the spreading of germs and viruses.

Our creative application engineer in Norway, Stian Mork, decided to take the original Materialise design a step further. A door opener is exposed to repetitive loads, especially in office environments. Stian therefore thought it best to use a material and a 3D printing technology that could reinforce the door opener and add strength. The go-to solution was the 3D printer Markforged Mark Two. This is a 3D printer that uses both a composite build material and reinforcement fibers, resulting in super-strong parts.

 

How to prepare a file for 3D print

The first step was to import the original Materialise design file in the software Markforged Eiger. This is where all 3D files are prepared for 3D printing.

In Eiger, we specified build material and what continuous fiber to use. Continuous fibers are added to certain build layers and add extra strength or other mechanical properties, depending on material type. We chose carbon fiber. We also specified the number of layers with continuous fibers. For the build material, we used Onyx. This is a composite plastic and contains chopped carbon fiber. These fibers add to the strength of a printed part.


Read our guide to  Markforged composite and fiber materials


“Using fiber-reinforced materials for applications like this can be a real door opener for many companies out there when it comes to producing strong and solid parts that are supposed to last over time.”, says Stian Mork.

 

Why reinforce with 3D print fiber?

The reason we chose to reinforce with fibers using Onyx as build material is to minimize fatigue in the door opener. With Onyx and continuous carbon fiber, the part will be much stronger and stiffer. Especially compared to ABS, nylon and PLA. Onyx is 1.4 times stronger than ABS, and twice as strong as nylon. The fiber reinforcement adds additional strength. In some 3D printed parts the strength is comparable to traditionally machined aluminium parts.

The final step was to assemble the door opener and mount it on a door handle. Worked like a charm.

 

 

Posted in 3D Printing
Tagged 3d-print, additive manufacturing, carbon fiber, Corona, Covid-19, door opener, eiger, Markforged, materialise

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