Update on Coffee can casting

4 Attachment(s)

I have now had a chance to test out my home made furnace, and make change to it.

I have reduced the lid hole to only half an inch, keeps more heat in.

When casting I have machined the carbon down to approximately 2mm thick around the mould.

The funnel shape for the silver scrap is not easy to get large enough but I have made the sprue hole large enough for some of the scrap to fill the mould shape.

Patience is needed for the silver to melt, of course changing state from solid to liquid takes a lot of heat, remembered that from school physics.

also moving the torch in or out of the inlet tube changes the internal temperature.

E-Mail me for a PDF of the build.

I have pictures of the casting produced.
Attachment 3555 Attachment 3556 Attachment 3557 Attachment 3558

Thats really cool !

I have managed to cast a 50mm long 4mm diameter rod, this was in a simple hole drilled in carbon block then the block cut down to leave 2-3mm side walls, when cool the silver fell out of the mould leaving it ready for another cast. you have to drill out the top of the mould for a funnel for the silver. I drilled a 10mm hole 10mm deep.