Madis Reivik
Hot Rolled
- Joined
- Jan 23, 2011
- Location
- Estonia
Hello !
I'm complete newbie at this field.
Imagine a typical heatsink (drafted fins). I make a positive model (ie. from aluminium). I make plaster cast of it. I bake the cast at 100'C and then at 200'C to get out all moisture.
Plaster mold looks good.
How should I pour in the aluminium ? If I make it top-down, then air wont come out from fin bottoms (tried once, complete failure). Should I make air release holes in fin tops and add some bottom plate to the mold, so the aluminium will be cast from the bottom and rises to top of fins ?
I feel very stupid at the moment, please share experience.
I'm complete newbie at this field.
Imagine a typical heatsink (drafted fins). I make a positive model (ie. from aluminium). I make plaster cast of it. I bake the cast at 100'C and then at 200'C to get out all moisture.
Plaster mold looks good.
How should I pour in the aluminium ? If I make it top-down, then air wont come out from fin bottoms (tried once, complete failure). Should I make air release holes in fin tops and add some bottom plate to the mold, so the aluminium will be cast from the bottom and rises to top of fins ?
I feel very stupid at the moment, please share experience.