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| Thoughts about making ladles |
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| vtsteam:
--- Quote from: Meldonmech on August 04, 2013, 09:56:39 AM ---Hi, The ladels I have used have been hemispherical, with a pouring lip and I have never experienced any problems. Cheers David --- End quote --- Hemispherical should be a good pouring shape for a ladle. Just like a soup ladle! |
| ironman:
vtsteam Thank you for posting that crucible video it was very informative! It even shows isostatic pressing which I wondered how it was done. Here is my attempt at using a lump of coke and machined it in the lathe to get the crucible shape. It was used in a microwave oven to melt pewter to pour into a silicon rubber mold. |
| NeoTech:
Isnt turning coke kinda harsh on the machine with all the powders coming off of it? |
| vtsteam:
Wow, Ironman, that was quite an experiment! :bow: :bow: :bow: You've found a lot of uses for micowave ovens -- and parts of them. A place I used to work at used graphite crucibles to do thin film metal deposition on optical filters. As an experiment I once turned one from raw graphite stock for them, but there were too many impurities in it apparently to be useful. But turning coke is I imagine much more difficult than graphite. Graphite is merely soft, messy and delicate -- but uniform. I imagine coke is not quite so simple. I've also turned graphite to make a hot air engine power piston. One more example of the amazing stuff you've tried and succeeded with. :beer: |
| ironman:
NeoTech I covered the lathe with rags to protect the slides and used a vacuum cleaner to suck up the dust before it spread all over the lathe. Certain coals contain pitch which bonds the carbon to make coke. Pitch is also used to bond coke dust to make carbon electrodes for arc furnaces. When a crucible says it is carbon bonded it uses pitch as a binder. |
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