#video on #manufacturing a cast-iron wrench with lost-PLA casting in waterglass sand with a microwave kiln. It broke when he tried to use it. As usual #Shake-the-Future suffers from a significant amount of talking-head filler.
on 02026-03-14#Shake-the-Future #video of a microwaveable soldering iron with a sodium-silicate-bonded carborundum susceptor, which is wrapped in a ceramic-fiber blanket to hold it in place inside a cage made by #3D-printing a high-temperature resin. The blanket is in turn held in place with green (!) Kapton tape. 30 seconds in his household microwave heated the 10 grams of carborundum to a nice electronics soldering temperature. He soaks the exposed edge of the blanket with boric acid with the idea that this will keep it from fraying and producing irritating dust.
on 02025-02-03#Shake-the-Future #video on his “print-wave casting” #manufacturing technique with #3D-printing
on 02024-09-03#Shake-the-Future #video of #3D-printing a split casting box, with alignment pins, with the pre-split casting form halves already in it, allows you to pour investment casting plaster (dental casting plaster without sand) onto the print bed, then withdraw the form from the plaster once it sets up. Sprues can be hollow, and I guess the form can too. He’s using PLA, which in this case you don’t actually want to spontaneously delaminate from the bed when it cools. And he’s running G-code on the printer (a Prusa MK4) to shake out the bubbles from the plaster! This also avoids the need for alignment pins in the form (just the box) and the need for parting dust. I bet you could do this with sand casting too! To help with withdrawing the form from the mold, he microwaves it in a plastic bag, which even permits undercuts, like lost-PLA casting. No plastic is left in the mold when you turn the furnace on. He uses his airfryer to dry the mold for two hours, then his oven for three more hours at 250°. And then he uses a microwave kiln to melt brass! He says it can even melt stainless! His alignment-pin holes were sized for M8 bolts, which also hold the mold shut. He uses a Noga deburring tool to remove the mold flash. He calls this technique “print-wave casting” because he uses the microwave. #manufacturing
on 02024-07-10