Re: Topic:Autoclave principals for Dewaxing?


Bramblebush ForumsFAQ

Posted by Jesse Brennan on July 21, 1999 at 21:30:04:

In Reply to: Topic:Autoclave principals for Dewaxing? posted by Jack Davis on December 15, 1998 at 18:26:12:

The industrial dewaxing autoclave I have seen runs at 110 psig

which is equivelent to 344 degrees F.

The primarl molds dewaxed are injection molded industrial parts. The wax is quite hard and will contain a lot of polyethylene.

The sculpture molds of ours are mostly victory wax anmd parafin.

Small Jewelry dewaxers opperate at atmospheric pressure or 212 degrees. I don't know what the large jewelry makers (Artcarved etc ) use.

Any pressure vessel used over about 1 Cubic Ft volume needs designed and built to the ASME unfired vessel code. If Fired it needs built to the fired vessel code. The codes have changed since I worked with them and they are too much to remember anyway.

A steam pressure vessel failure makes a super mess.

A home pressure cooker will be below this limit but needs careful attention to proper pressure relief and control.

An atmospheric boiler is the only almost safe thing for non professonal use.


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