How to polish 3D printing parts?

The samples printed by the FDM desktop printer will appear in circles, which is its inherent characteristic. If the printing accuracy is not high, there will still be obvious step effects, which will greatly reduce the aesthetics of the sample, so some people say that 3D printed prototypes can only work as a entry test.

But it is inevitable that there are still designers that want to achieve a shiny and shiny effect, so various polishing techniques have emerged at the historic moment. Now, HITIONS will present several polishing techniques.


Fire roast


The easiest way, no need for various equipment, you only need a lighter to perform simple polishing on the surface of the model. How to do it? The method is very simple, that is, burn the burr with fire. It is worth noting that when you burn ABS with fire, you must pay attention to safety and more attention to ventilation.

Acetone polishing 


The 3D model was fumigated with acetone steam, and the model was polished by using the properties of ABS in acetone. The most important thing to pay attention to when using acetone polishing is safety. Acetone is toxic, flammable, explosive, and irritating. It is recommended to wear safety equipment such as a gas mask in a well-ventilated environment.

In the picture is a simple polishing device modified by myself, which is heated by an induction cooker water bath. Some ABS materials are dissolved after the acetone volatilizes, and the polishing effect is quite good.

The vibration polishing machine


Use vibration polishing machine for polishing, or centrifugal polishing machine for polishing. The main principle is to achieve polishing through the collision friction between the medium and the model.

Sandpaper sanding 


Use sandpaper to sand, tool sandpaper, and sander. 600 or 800 water sandpaper, 1000 water sandpaper, 1200 water sandpaper, 1500 water sandpaper, a bowl of water, a toothpaste, a clean glasses cloth.

Water sandpaper is added with a little water when grinding. The larger the number, the finer the sandpaper. After grinding, the parts will have no luster. At this time, you should use toothpaste to polish the parts to restore the luster. However, sandpaper is slow in sanding efficiency and we have to bear the limited feature.


Pearl treatment

Pearl treatment is to spray the medium beads at high speed towards the polishing object with the hand nozzle to achieve the polishing effect. It has both pros and cons. The advantage is that pearlescent treatment is generally faster, and the treatment can be completed in about 5 to 10 minutes. After treatment, the product surface is smoother, and the effect is better than sanding, and there are different effects depending on the material.

The disadvantage: it is expensive, and the other is that pearlescent treatment is generally performed in a closed chamber, so the objects it can handle are limited in size. Usually, the models that are processed are relatively small, and the entire process requires Holding the nozzle by hand has low efficiency and cannot be applied in batches production.

3D model polishing fluid


After putting the polishing liquid into the operating vessel, hang the model with iron wire or rope on the model base, and immerse the model for about 8 seconds. Because of the temperature and environmental impact in different regions, polish as needed The effect is appropriately adjusted, and it should not be soaked for too long.

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