Maker uses ultrasonic atomized acetone to polish 3D printed objects
It is well known that the surface of an article printed on a desktop 3D printer tends to have a circle of texture, which is inherent in the fused deposition molding (FDM) technology itself. In order to make the surface appear smoother, many 3D printing enthusiasts often use acetone vapor to surface the surface after printing with ABS material to eliminate the texture.
Acetone is a solvent that is easily available on the market. It is generally safer and has a better effect. When it comes into contact with ABS objects, it will easily dissolve the surface of the surface, making it look smoother. bright. This process, if done well, will make it easy for you to get rid of the layers inherent in FDM 3D printing technology .
However, it should be noted that although acetone is generally safer, it is still a chemical solvent. If it is too much contact, it will still cause adverse reactions, such as headaches. Moreover, the polishing effect tends to be inconsistent in surface effects, and excessive exposure to acetone vapor causes some printing details to be dissolved. Even some 3D printing enthusiasts have warned that if acetone vapor is exposed to too much heat, it may explode.
In response to these circumstances, Mike from the technology blog EngineerDog invented a device he called Ultrasonic Misting 3D Vapor Polisher to improve the problem of polishing 3D printed objects with acetone.
Although it sounds very tall, in fact Mike's device is made up of a common ultrasonic humidifier, an acetone storage container and a can (as a steam chamber for processing 3D printing objects). Its processing principle is such that the ultrasonic humidifier generates a fine mist containing acetone droplets by ultrasonic vibration (the degree of density of the mist can be controlled by a potentiometer). Then, the acetone mist was blown into the steam chamber where the 3D printing object was placed by means of a small air pump. This creates a largely automated system that minimizes manual involvement and reduces the negative impact on the human body. In addition, in this system, since the concentration of acetone water mist is controllable, the polishing fineness is also greatly improved.
If you are interested in the device, Mike shared his production process in detail in the open source hardware station Instructables (click to enter the tutorial), the cost of the entire device is about $ 40. However, it should be reminded that although the device is very simple in principle, it involves the modification of the humidifier in the production process, and there is a lot of manual work, which can be completed in three to five minutes.
Finally, it is worth mentioning that Mike also used this device to compare the intensity changes of acetone-polished 3D printed objects (see video below), and the results were surprisingly found to be contrary to our usual impressions. After acetone treatment, the intensity of 3D printed objects becomes weaker! In real time, on average, the strength of parts smoothed with acetone was approximately 24% weaker.
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