14-10-2023, 06:06 PM
I thought I had posted about this at length once before. I have several photos of my home set up on an old laptop hard drive... the Speedex projects are taking far too long!
I'll try to find them later.
Don't use plaster of Paris unless you read up on drying it out. Green sand vents steam... plaster of Paris apparently can shatter with the steam unable to escape.
A split wooden box and green sand work well. You will have to read up on percentages, but you do need to allow for shrinkage. Make up a wooden spree former and put it next to your former so that when you pour the aluminium in it weirs over into the thing your casting and you'll get much a better surface finish.
I'll try to find them later.
Don't use plaster of Paris unless you read up on drying it out. Green sand vents steam... plaster of Paris apparently can shatter with the steam unable to escape.
A split wooden box and green sand work well. You will have to read up on percentages, but you do need to allow for shrinkage. Make up a wooden spree former and put it next to your former so that when you pour the aluminium in it weirs over into the thing your casting and you'll get much a better surface finish.