Greetings adolescent nerds. The Internet’s admired bogus baritone chemist has a problem. His hotplates bake up too fast. He needs your advice to fix this problem.
[NurdRage] is acclaimed about these genitalia for his actual all-embracing explorations of allure including the best means to compose a PCB, architecture a thermometer delving with no instructions, and actinic amalgam that shouldn’t be performed by anyone after years of acquaintance in a lab. Over the accomplished few years, he’s had a problem: hotplates suck. The heating aspect is usually ailing constructed, and appropriate now he has two burst hotplates on his bench. These things aren’t cheap, either: a bare-bones hotplate with a alluring stirrer runs about $600.
Now, [NurdRage] is allurement for help. He’s contacted a few manufacturers in China to get a hundred or so of these hotplate heating elements made. Appropriate now, the amount for a mica and metal antithesis hotplate is about $30 / piece, with a minimum adjustment abundance of 100. That’s $3,000 that could be bigger spent on article a bit added absorbing than a heating element, and this is area you appear in: how do you body the heating aspect for a hotplate, and do it cheaply?
If you buy a hotplate from the accepted lab accessories supplier, you’ll get a few pieces of mica and a attenuate trace of metal foil. Eventually, the metal antithesis will oxidize, and the absolute hotplate will stop working. Repairs can be done with chestnut tape, but by the time that adjustment is needed, the heating aspect is already on its way out.
The requirements for this heating aspect accommodate a best temperature of about 350 ºC. That’s a fair bit hotter than any PCB-based calefaction bed from a 3D printer gets, so accede that band of acumen a asleep end. This temperature is additionally aloft what best resins, thermoplastics, and composites can handle, which is why these hotplates use mica as an insulator.
Right now, [NurdRage] will apparently end up spending $3,000 for a accumulation buy of these heating elements. That’s absolutely not that bad – for the amount of bristles hotplates, he’ll accept abundant heating elements to aftermost through the blow of his YouTube career. There charge be a bigger way, though, so if you accept an abstraction of how to accomplish a high-temperature heating aspect the DIY way, leave a agenda in the comments.
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