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Building a vacuum assisted caster for silver and gold.

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Author Topic: Building a vacuum assisted caster for silver and gold.  (Read 618 times)
T P
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« Reply #15 on: January 21, 2016, 11:52:56 am »

why does the vacuum chamber have to be an aluminum box?   A pc. of large diameter steel pipe with a suitable pc of plate welded to the bottom would be much easier to find.  A circular chambe would also be subject to less stress when the vacuum is pulled on the chamber.
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T P
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« Reply #16 on: January 21, 2016, 01:12:33 pm »

here are attached photos of the table I built.  the last photo is of the tuyere,  a safety valve if the bottom of the flask fails and molten metal is sucked into the system,  the plastic bottom melts out rather then plugging the machine


* casting table top.JPG (38.1 KB, 480x320 - viewed 24 times.)

* casting table bottom.JPG (39.45 KB, 480x320 - viewed 18 times.)

* casting table tyre.JPG (33.67 KB, 480x320 - viewed 20 times.)
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Debbie K
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« Reply #17 on: January 24, 2016, 10:31:12 am »

Darn it! Can't view the pictures. I really want to see what you made, especially with the safety feature.

I've had problems getting on to this site for the last few days; anyone else?

Debbie K
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T P
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« Reply #18 on: January 24, 2016, 05:48:59 pm »

here are attached photos of the table I built.  the last photo is of the tuyere,  a safety valve if the bottom of the flask fails and molten metal is sucked into the system,  the plastic bottom melts out rather then plugging the machine


* casting table top.JPG (38.1 KB, 480x320 - viewed 9 times.)

* casting table bottom.JPG (39.45 KB, 480x320 - viewed 8 times.)

* casting table tyre.JPG (33.67 KB, 480x320 - viewed 7 times.)
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Debbie K
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« Reply #19 on: January 24, 2016, 08:03:06 pm »

Thanks for the pictures! I like the valve on the bottom. I might have to end up making one in the future if the commercial one gives out, so this is good to know.

Debbie K
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