Lost pla ceramic shell cast iron

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DavidF
Posts: 267
Joined: Wed May 14, 2014 12:28 pm
Location: Delaware

Lost pla ceramic shell cast iron

Post by DavidF » Sat Mar 16, 2019 12:42 pm


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Sandiapaul
Posts: 404
Joined: Wed Jan 07, 2004 8:04 am
Location: Princeton, NJ

Re: Lost pla ceramic shell cast iron

Post by Sandiapaul » Sat Oct 19, 2019 5:41 am

Can someone here explain how there is no need for vents? How is it that there is no problem with air pockets preventing the metal from flowing in? I asked this on another forum where the maker of the video posted it. The author of the video even show how he made experiments with top down and bottom up feeds. One suggestion is the ceramic shell is porous. Any thoughts? I must be missing something about the process.

DavidF
Posts: 267
Joined: Wed May 14, 2014 12:28 pm
Location: Delaware

Re: Lost pla ceramic shell cast iron

Post by DavidF » Sat Oct 19, 2019 9:54 am

Yes, the ceramic shell is indeed porous...

RONALD
Posts: 575
Joined: Sun Oct 26, 2003 7:27 am

Re: Lost pla ceramic shell cast iron

Post by RONALD » Sat Oct 19, 2019 9:55 am

I have done some ceramic shell, but they are all fairly large castings, were done in Lost Foam, and top gated.

They were burned out in an oven for ceramics.

The side rods came out ok in C99700, I gave up on iron several decades ago.

The real size bell hanger is yet to be poured in A319, just haven't found the time.

There are no vents because of my top gating, I hope, let all the gasses out.

When I did Lost Foam in CO2 sand, and bottom gated, I had lots of risers.

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Mixed upa068.jpg

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Sandiapaul
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Location: Princeton, NJ

Re: Lost pla ceramic shell cast iron

Post by Sandiapaul » Sat Oct 19, 2019 11:34 am

Thanks for the info Ronald!

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