Better 3D printing via chemistry?


If you’re having trouble getting a 3D print to stick to the bed, you might consider using glue to hopefully temporarily attach the print to the bed. Also, some plastics bond well if you use a solvent. [Stefan] asks the question: What if you used a solvent to bond each layer of a 3D print to the previous layer? The answer is in the video below.

If you know [Stefan], it is still meticulous, so the first test was with normal ABS parts. Then he used a solvent to glue two broken pieces together to show how a single layer behaves with gluing. Then he proceeded to try the solvent for each coat.

Obviously, if you already knew that was a good idea, you would want to install something to apply the remover automatically. Since it was experimental, however, [Stefan] just had the gcode move the printhead aside for each layer so it could manually apply the solvent. This was trickier than you might think because acetone boils hot plastic quickly. Also, if it doesn’t boil, it causes the existing layer to swell, so the look of the parts wasn’t great.

Unfortunately, the solidity of the printed parts was disappointing. The ABS parts were no better – and in some ways worse – than the reference parts. He then tried PVB which dissolves in alcohol. Although it was easier than acetone, the results weren’t that good.

[Stefan] hope there might be a process to make this work, but the simple methods he’s tried aren’t helpful. It would be great if this simple idea led to stronger 3D printed parts. But like [Stefan] points out, negative results are also important. Otherwise, we’ll all spend time trying things that won’t work over and over. Based on these results, you can try something different and you may have better luck.

We really appreciate meticulous and rigorous work [Stefan] Is. From high throughput extrusion equipment to setting up bends in gcode, [Stefan] always has something interesting and well thought out.


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