Tricky 3D printed joinery problem? Give heat stacking a try

If you can't 3D print something as a single part, you need to join the pieces together. In such cases, most of us instinctively include threaded inserts or nut slots in the design, or reach for the CA glue tube. But maybe you need to think more Heats your printed parts together.

Even if you're not familiar with the term, if you've looked inside anything made of plastic, chances are you've seen a heat-filled joint. as [Richard Sewell] Explained, a heat-side joint is nothing more than a classic mortise and tenon made of plastic, where the tenon stands proud of the face of the joint so it can be softened by heat. The tendon is stretched so that the joint cannot be separated. A variation on the theme involves a mortise with a generous chamber so the molten tenon spreads, which not only provides additional resistance to pull-out, but also a more flush surface.

joint melt, [Richard] Simply uses a soldering iron and a little pressure. To spread both the heat and the force a bit, he uses a barrel of iron instead of a tip, although we can see a wider chisel tip being used for smaller joints. Anyway, a layer of kapton tape helps keep the iron from bending with the melted plastic. [Richard] He lists several advantages to this type of plastic joinery, including eliminating the need for additional hardware. But the best part of this combination is that by avoiding monolithic prints, every aspect of a piece can enhance its layered lines.

Although it probably won't apply everywhere, heat-stacking seems like a technique worth keeping in mind. We want to see [Stefan] Over the clock CNC kitchen Work some of his experimental magic on these joints, as he did for the threaded inserts.

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