June 17, 2024

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Are you having a 3D printed carpentry problem?  Try thermal staking

Are you having a 3D printed carpentry problem? Try thermal staking

When you can't 3D print something as a monolithic part, you'll have to join the pieces together. In such cases, most of us instinctively include threaded inserts or nut holes in the design, or even reach for a tube of CA glue. But maybe you should think more along these lines Heating the printed parts together.

Although you may not be familiar with the term, if you've looked inside anything made of plastic, you've probably seen a heat-affected joint. like [Richard Sewell] He explains that a heat bonded joint is nothing more than a classic mortise and tenon made of plastic where the tongue stands proud on the face of the joint so it can be softened with heat. The tongue spreads so that the joint cannot be disassembled. One variation of the theme includes a mortise with a large chamfer so that the molten tongue can spread out, providing not only additional resistance to pulling but also a smoother surface.

to dissolve the joint, [Richard] Simply uses a soldering iron and a little pressure. To distribute the heat and force a bit, use an iron pipe instead of a tip, although we can see a wide chisel tip used for smaller joints. In either case, a layer of Kapton tape helps prevent the iron from coming into contact with the molten plastic. [Richard] It lists a host of advantages to this type of plastic joinery, including eliminating the need for additional hardware. But we believe the best advantage of this joint is that by avoiding homogeneous prints, the layer lines of each side of the part can be improved.

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Although it probably won't be applicable everywhere, thermal stacking seems like a technology to consider. We would love to see [Stefan] In more than CNC kitchen He performs some of his experimental magic on these joints, as he did with the threaded inserts.