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Here’s something that may be of interest to all the reprappers, vacuum formers, and other plastic fabbers out there: ultrasonic welding of plastics. If you’ve ever wanted to join two pieces of plastic without melting them together with acetone or screwing them together, [circuitguru] is your guy. Ultrasonic welder setups are usually reserved for companies that [...]

Tags:  welding plastic diy vacuum-formers ultrasonic-plastic-welding welding-of-plastics tool hacks  

Anybody who has a 3D printer always has a ton of useless plastic lying around. Some of that plastic may be from useless baubles, but most of it is in bad prints, short bits of filament, and general scraps. [Luke] found an interesting way to put those ABS scraps to use, and ended up turning [...]

Tags:  welding plastic abs luke 3d-printer baubles filament tool hacks  

Hackaday reader [David] was looking for a cheap and easy way to spot weld copper tabs together. As he notes in his writeup, the properties of copper which are most enticing, such as high thermal capacity, make welding it all that more difficult. His home-brew method of spot welding is admittedly quick and dirty, but [...]

Tags:  spot copper welding david spot-welder properties-of-copper spot-welding tool hacks  

[Todd Harrison] put together a welding cart that has all kinds of tricks built-in. The carcass is a cheap rolling cart that has been reinforced with steel plate and beefier wheels. The top tray can be loaded up with fire brick for oxygen-acetylene welding or with a grate for cutting. That grate lets the slag fall [...]

Tags:  cart grate welding todd-harrison fire-brick tool hacks