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| casting question |
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| Swarfing:
Avoid cat liter as it is mixed with other stuff that can not be guaranteed and very difficult to grind. Bentonite cay is classed as deep dug clay which in general is the Grey clay you see. As long as it is not dyed which it will say will do the job nicely. Ideally it needs to be the powdered variety so that is can be mixed thoroughly. Perlite you can get from a garden centre and the sand needs to be silica sand. you can find this at the builders merchant as the type used for brushing in between paving blocks. Or the other source is child's play sand. It is very fine and clean as it is normally washed and dried. Hope this helps |
| dieselboy:
--- Quote from: andyf on April 01, 2011, 04:20:53 PM ---Hi Malcs, Here's yet another link showing how to make a furnace from Portland cement, cat litter and Perlite. It does work; I took the photos on the lost foam casting page. http://mikesworkshop.weebly.com/foundry.html Andy --- End quote --- thank you for suggestions I now have a copy of '' foundrywork for the amateur'' which is making good reading at the moment, I have also read about adding perlite to cement to make a heat resistant barrier in a metal drum / cylinder and noticed our local ''wilkinsons'' do perlite for adding to flower pots (etc) at quite a cheap price. Is it possible to make a furnace out of an old propane cylinder (47kg size) as i noticed one dumped in a ditch by the roadside a few days ago while cycling home from work im not sure about the cat litter though!! |
| Swarfing:
That would be perfect to make one from |
| SemiSkilled:
That 47 Kg cylinder would be fine, how are you going to get it home on the bike though? :D this thread start of with making the furnace step by step. http://forums.vwvortex.com/showthread.php?4662626-The-complete-guide-on-casting-parts Lee |
| dieselboy:
--- Quote from: SemiSkilled on April 03, 2011, 05:30:12 AM ---That 47 Kg cylinder would be fine, how are you going to get it home on the bike though? :D this thread start of with making the furnace step by step. http://forums.vwvortex.com/showthread.php?4662626-The-complete-guide-on-casting-parts Lee --- End quote --- oh, no, ,, i spotted it in a ditch on my bike, but if i do try to get it i will use my series 3 land rover to take it home (just got to fix the brakes first) :bugeye: |
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