Re: [CAD_CAM_EDM_DRO] Machineable wax problem

Acrylic works fine. Just keep the stuff cool when machining otherwise a mess.
Everything you will burn out will give off fumes. Burn out under a hood or outside.
Machineable waxes are a mixture , more polymer than wax to get the hard higher melting point needed to machine. Injection molding
waxes used for industrial casting are also wax plus polymers. These will be initially dewaxed in a steam autoclave with about 100
psig saturated steam. After the autoclave step a little wax remains to be burnt out . Temperature and treatment depends on the
investment type. Dental and jewelry and some sculpture will use a Gypsum based plaster mixture with various silica compounds .
These materials are limited to temperatures suitable for silver, gold and bronze. A different but similar investment material is
used for platinum.
Industrial casting and a lot of art sculpture today will use a process based on a colloidal silica slurry coated with fine fused
silica or zircon sand. This is a multi dip process taking several days to complete. Iron Steel and stainless steel and the lower
melting metals are cast in these investments.
Jesse

Jon Anderson wrote:

> Marcus,
>
> I'd sure be interested in this acrylic that can be burned out.
> You say it burns out clean, are you referring to leaving the mold clean
> or in terms of fumes. I have a hard time picturing any plastic burning
> clean in terms of the latter, and would be interested if such does
> exist.
>
> Jon
>
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