Amongst other things, been progressing casting something from a 3D printed part. In this case it is a short inlet manifold runner for a Nissan VH45 V8, a foul stroke it seems.
So, printed the part using Polycast filament, a bit wax like. Then stuck on a couple of moulded wax bits for the ingate and riser and then invested it in a 2:1 (by volume) mix if Plaster of Paree and sand.
Then slowly heated it to successive melt out and then burn out the filament, the last step was overnight at 400 C. Lots of nice noxious smoke and smells. Made up an insulated burnout chamber, based on a 240 V hotplate element, controlled using an old thermocouple controller, not programmable though.
Letting it cool to room temp (didn’t do this the first time and went in hot…fail) and splashed in some melted down BMW rims.
Came out pretty well, some flaws when the plaster mould split, I think at the time of pouring as it wasn’t split before.
Pics tell the story.
"Success is the ability to go from one failure to another with no loss of enthusiasm.”
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