Vacuum Casting

[Finster]

Interested in making a vacuum casting machine, or possibly another machine incorporating a vacuum pump.

Not sure of your applications or exact wants and I haven't tried this myself but I plan to follow this guys lead. He has a nice
channel on Youtube called "aonemarie". He does all sorts of casting. Here's a video of him making the vacuum chamber he uses which seems pretty
straight forward and I think he gets good results based on the other videos of parts he's made.

Hope this helps...

Brian