| Author |
Message |
Topic: Foundry Tutorial Discussion |
Daniel Rotblatt
Replies: 181
Views: 9796
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Forum: General foundry talk Posted: Sat Jul 26, 2008 4:57 am Subject: Foundry Tutorial Discussion |
Just found this thread, and I've only had a chance to glance through it, but I am very impressed - it looks great! Although I wouldn't have expected less from you...
I've also been working ... |
Topic: not so much of a furnace question as a forge question |
Daniel Rotblatt
Replies: 54
Views: 3586
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Forum: Foundry engineering and construction Posted: Wed Jul 23, 2008 11:31 pm Subject: not so much of a furnace question as a forge question |
I used a 50 lb harbor freight anvil for many years.
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=806
In retrospect it was too light and was a "cast iron anvil shaped objec ... |
Topic: not so much of a furnace question as a forge question |
Daniel Rotblatt
Replies: 54
Views: 3586
|
Forum: Foundry engineering and construction Posted: Sun Jul 20, 2008 5:51 pm Subject: not so much of a furnace question as a forge question |
How do you keep the ceramic blanket and firebrick in place, or does it just "sit" in there by itself? What is kiln shelf made out of?
I put the brick on the bottom and cut the ceramic fi ... |
Topic: not so much of a furnace question as a forge question |
Daniel Rotblatt
Replies: 54
Views: 3586
|
Forum: Foundry engineering and construction Posted: Sun Jul 20, 2008 5:16 am Subject: not so much of a furnace question as a forge question |
| Welder is right, a forge is just a furnace on its side (or vice versa - depending on your point of view). I've made a number of forges - I used to forge knives and swords. I usually use ceramic blan ... |
Topic: not so much of a furnace question as a forge question |
Daniel Rotblatt
Replies: 54
Views: 3586
|
Forum: Foundry engineering and construction Posted: Sat Jun 28, 2008 4:11 am Subject: not so much of a furnace question as a forge question |
Try Biringuccio's book: http://www.amazon.com/Pirotechnia-Vannoccio-Biringuccio-Sixteenth-Century-Metallurgy/dp/0486446433/ref=sr_1_1?ie=UTF8&s=books&qid=1214625258&sr=1-1
It was writte ... |
Topic: some model castings |
Daniel Rotblatt
Replies: 23
Views: 1780
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Forum: General foundry talk Posted: Sun Jun 15, 2008 4:21 pm Subject: some model castings |
| Abby, I figured you had tried all of these - you've been doing this longer then I have. But...you never know. With ceramic shell I never get large bubbles - and never on a smooth surface such as you ... |
Topic: this is so wrong |
Daniel Rotblatt
Replies: 18
Views: 1349
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Forum: General foundry talk Posted: Sun Jun 15, 2008 6:43 am Subject: this is so wrong |
Gentlemen, I am an artist, and I take umbrage at your comments about my fellows!
Of course I'm also a strong advocate of Darwin....  |
Topic: some model castings |
Daniel Rotblatt
Replies: 23
Views: 1780
|
Forum: General foundry talk Posted: Sun Jun 15, 2008 6:22 am Subject: some model castings |
| Abby, bubbles are a bitch. I did a life casting of a hand recently and at many of the hair follicles there were tiny little bubbles (maybe 1 mm) - I sat there for several hours with magnifying glasse ... |
Topic: Waxes and Burn times |
Daniel Rotblatt
Replies: 33
Views: 1799
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Forum: General foundry talk Posted: Wed Jun 04, 2008 7:24 am Subject: Waxes and Burn times |
| I don't know off hand, but many years ago I used to buy cups and sprues from local foundries at a pretty low cost. With the prices of metals now I don't know it this would still apply. Worth calling ... |
Topic: Need Mold Help -> Gating Issue? |
Daniel Rotblatt
Replies: 67
Views: 3890
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Forum: General foundry talk Posted: Wed Jun 04, 2008 7:14 am Subject: Need Mold Help -> Gating Issue? |
You are approaching this with the positive attitude of a true scientist - negative results give as much information as positive ones. Wish my suggestions had resulted in a "fix" though.
... |
Topic: Waxes and Burn times |
Daniel Rotblatt
Replies: 33
Views: 1799
|
Forum: General foundry talk Posted: Sun Jun 01, 2008 6:56 am Subject: Waxes and Burn times |
| I've been getting it from Industrial Metal Supply Co, which is local here in L.A. so there is no shipping. I generally purchase smaller amounts, so the cost is higher, plus I haven't purchased in a y ... |
Topic: silver porosity |
Daniel Rotblatt
Replies: 6
Views: 732
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Forum: General foundry talk Posted: Sun Jun 01, 2008 6:45 am Subject: silver porosity |
| This was sterling, but I mixed it myself from 99.9 ingots and copper wire. This piece was not a centrifugal casting, it was a ceramic shell casting - or actually two castings: the front piece is silv ... |
Topic: silver porosity |
Daniel Rotblatt
Replies: 6
Views: 732
|
Forum: General foundry talk Posted: Sat May 31, 2008 4:17 am Subject: silver porosity |
| When I used to cast jewelry I used a centrifugal caster, I imagine the centrifugal force caused so much pressure that bubbles are squeezed out. I recently cast a medallion out of silver (with a bronz ... |
Topic: Waxes and Burn times |
Daniel Rotblatt
Replies: 33
Views: 1799
|
Forum: General foundry talk Posted: Sat May 31, 2008 3:56 am Subject: Waxes and Burn times |
| Check a few other places for their shipping costs. For example, Arizona Sculpture supply will charge $14 (shipping to Battle creek) for a 10 lb slab- that's $44/1 slab. Not too crazy - 10 lbs of wax ... |
Topic: Waxes and Burn times |
Daniel Rotblatt
Replies: 33
Views: 1799
|
Forum: General foundry talk Posted: Fri May 30, 2008 7:02 pm Subject: Waxes and Burn times |
| Sure, bee's wax is the most traditional type of wax to use - greeks, romans, egyptians, asia...all the way back to the bronze age. Microcrystalline was developed as a less expensive synthetic version ... |
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