Kram
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- Sussex
Plan to try the former either today or this week.
@DAPPH How much of that is from experience?
I have some borax but it would eat the cuicibles quicker, so I dont use it. I might try citric cleaning the nuts and graphite powder or a carbon source as a cover. However with a huge surface area of nuts, losing 10% is acceptae I think, should be much less when remelting solid bits.
The 3d print will need under 170g of brass. The problem was my carved sand runners leaked and used more than I expected. A previous one was 350g.. A traditional plaster pouring tree would use less brass, but double the plaster - dont have all that much left! 2 or 3 more attemps.
Sprues are for filling, there is only one and it should be a very specific size.
Vents, yes they can be many, shouldnt be needed with porus plaster. 1/4" is way too big.
I may change things and try using the vacuum chamber for the next pour.
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@DAPPH How much of that is from experience?
I have some borax but it would eat the cuicibles quicker, so I dont use it. I might try citric cleaning the nuts and graphite powder or a carbon source as a cover. However with a huge surface area of nuts, losing 10% is acceptae I think, should be much less when remelting solid bits.
The 3d print will need under 170g of brass. The problem was my carved sand runners leaked and used more than I expected. A previous one was 350g.. A traditional plaster pouring tree would use less brass, but double the plaster - dont have all that much left! 2 or 3 more attemps.
Turbulence is not desired. Slow is much better. With the correct excess of brass there will be plenty of head to get the air out when a porus medium is used. Its not an extreme detailed object like a grasshopper*to let the molten brass rush in and the air out quickly
Sprues are for filling, there is only one and it should be a very specific size.
Vents, yes they can be many, shouldnt be needed with porus plaster. 1/4" is way too big.
I may change things and try using the vacuum chamber for the next pour.
*