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Make your own ultrasonic 3D print polisher with acetone and an air humidifier – 3ders.org (blog)

by • July 1, 2016 • No Comments

Jul 2, 2016 | By Benedict
Michael Graham, 27, an engineer of Portland, Oregon, has turn it intod an ultrasonic 3D print polisher, sharing the assembling process on Instructables. The Automated Ultrasonic Misting 3D Print Polisher PRO uses acetone vapor to apply a pro polish to ABS 3D printed parts.

Everybody wants their 3D printed parts to appear excellent, but “appearing excellent” can mean most different types of things. For a lot of makers, the ideal finish can include a polished surface, minimizing that distinctively matte, layered appearance typically synonymous with 3D printed material. Sounds excellent in principal, but a silky smooth finish can be complex to pull off—especially on a budget. Last year, Michael Graham published his initially 3D print polisher on Instructables, a repurposed ultrasonic water humidifier, that the engineer hoped may turn it into a predictable finish while in addition being “as convenient as a microwave.” Graham has now returned with a additional high end “PRO” model of his machine, deplete with an improved form factor, simplified process, and higher level of efficiency.
On the other hand his initially 3D print polisher was capable of achieving the desired impacts, Graham wanted to turn it into a additional transportable and efficient model of his machine; one with a single transparent assembly, that may safely be utilized indoors. With a few technical alterations, he has managed to complete this goal: “The user interface is now just an ON/OFF switch and a single momentary button for ‘go’,” Graham explains. “The new create now uses a closed pumping process and has been optimized for maximum fog production; So it is depletely sealed enabling for indoor use, it takes less time, consumes less acetone to do the job, and no water at any time needs changing!”

At its core, the 3D print polisher uses an animal-shaped ultrasonic rad mist humidifier, (Graham opted for the frog) whose entire process of internal electronics can be repurposed for the polisher. Liquid solvent acetone is pumped of one clear box into another—that contains the 3D printed part—to turn it into an actuallyly distributed fog inside the 2nd box, covering the entire surface of the 3D printed part. Isopropyl alcohol can be utilized instead of acetone for polishing ‘PolySmooth’ material.
Whilst acetone may, theoretically, reduce the durablity of ABS 3D printed parts, Graham conducted a number of experiments with his machine, some day coming to an informative conclusion: “The overall effect of Acetone vapor polishing on ABS effectively makes parts pretty additional isotropic,” Graham explains. “That is, they react additional uniformly to applied loads of different types of directions. In this case, polishing sacrifices durablity in their sturdy axis to increase durablity in their weak axis.”

The full list of components and materials needed for the Automated Ultrasonic Misting 3D Print Polisher PRO can be discovered on its Instructables page. Graham plans to feature the machine at Portland’s Mini Maker Faire, that takes place September 10-11.

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