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Author Topic: Casting metals  (Read 1224 times)

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Offline KABAR2

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Casting metals
« on: April 15, 2008, 11:17:05 AM »
I was doing a search on brass & Bronze and came across a 1910 book on casting metals so I thought I would share the link.

http://books.google.com/books?id=rJNIAAAAMAAJ&printsec=titlepage&dq=difference+between+brass+and+bronze#PPA1,M1


Which then led me to do a search on Foundry Practice which led to this.....

http://books.google.com/books?q=+foundry+practice&btnG=Search+Books
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Mr president I do not cling to either my gun or my Bible.... my gun is holstered on my side so I may carry my Bible and quote from it!

Sed tamen sal petrae LURO VOPO CAN UTRIET sulphuris; et sic facies tonituum et coruscationem si scias artficium

Offline dan610324

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  • bronze cannons and copper stills ;-))
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Re: Casting metals
« Reply #1 on: April 15, 2008, 10:06:22 PM »
if you want some more up to date info , google for :  backyard casting
then you find tons of info .
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Dan Pettersson
a swedish cannon maniac
interested in early bronze guns

better safe than sorry

Offline dan610324

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Re: Casting metals
« Reply #2 on: April 22, 2008, 12:01:04 PM »
how is it kabar ?

got any nice ideas yet for an cast bronze cannon or mortar ??
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Dan Pettersson
a swedish cannon maniac
interested in early bronze guns

better safe than sorry

Offline KABAR2

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Re: Casting metals
« Reply #3 on: April 22, 2008, 04:04:43 PM »
Quote from: dan610324 on April 22, 2008, 12:01:04 PM
how is it kabar ?

got any nice ideas yet for an cast bronze cannon or mortar ??

Well I have my template for a mortar with a friend who turns wood, I traded some work with him and
he's making me my  pattern I hopping to hear it's done soooooon!

Allen <><

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Mr president I do not cling to either my gun or my Bible.... my gun is holstered on my side so I may carry my Bible and quote from it!

Sed tamen sal petrae LURO VOPO CAN UTRIET sulphuris; et sic facies tonituum et coruscationem si scias artficium

Offline dan610324

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Re: Casting metals
« Reply #4 on: April 22, 2008, 10:38:58 PM »
how to open and read the books in your links on top here ??
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Dan Pettersson
a swedish cannon maniac
interested in early bronze guns

better safe than sorry

Offline cannonmn

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Re: Casting metals
« Reply #5 on: April 23, 2008, 12:15:11 AM »
I saw several good techniques in use during my recent bronze foundry visit.  One was the use of porcelain filters at the entrance to the mold.  These look just like black sponges.  You pour the molten bronze through them and it takes out the residual junk you don't want in the casting.  You have to have the metal well-skimmed before pouring or it will plug up the filter.  The 1-inch thick filters are one-time use and cost about 50 cents each.
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Offline dan610324

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Re: Casting metals
« Reply #6 on: April 23, 2008, 12:31:48 AM »
where can I find any info about those filters ??
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Dan Pettersson
a swedish cannon maniac
interested in early bronze guns

better safe than sorry

Offline 5toolman6

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Re: Casting metals
« Reply #7 on: April 24, 2008, 12:52:34 PM »
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Offline cannonmn

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Re: Casting metals
« Reply #8 on: April 24, 2008, 04:16:25 PM »
Here's the video we just posted.  My apologies for its poor audio, roughness etc. but since my two Windows Movie Maker programs (I and II) both died on two different comp;uters, I had to quick learn a new video editing program, and I can barely use it at all at this point.  Anyway, here's the basic footage, but not purty:

http://www.youtube.com/watch?v=SAomnhzif7w
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Offline KABAR2

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Re: Casting metals
« Reply #9 on: April 24, 2008, 04:49:35 PM »
Cannonmn,

Thanks for sharing the Video!

It is nice to see their process and a variety of their work. 
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Mr president I do not cling to either my gun or my Bible.... my gun is holstered on my side so I may carry my Bible and quote from it!

Sed tamen sal petrae LURO VOPO CAN UTRIET sulphuris; et sic facies tonituum et coruscationem si scias artficium

Offline GGaskill

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Re: Casting metals
« Reply #10 on: April 24, 2008, 05:43:35 PM »
Brings back some memories for me (I just discovered my casting mentor died early this year.)  Wish I knew about the filters when I was casting my howitzers.
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GG
“If you're not a liberal at 20, you have no heart; if you're not a conservative at 40, you have no brain.”--Winston Churchill

Offline 5toolman6

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Re: Casting metals
« Reply #11 on: April 25, 2008, 12:53:31 PM »
Thank you for the video.

Ok Questions:

What type bronze was Bob pouring?

Why did he have a gap between his head and the pouring basin?
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Offline cannonmn

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Re: Casting metals
« Reply #12 on: April 25, 2008, 02:00:26 PM »
Quote
What type bronze was Bob pouring?

Why did he have a gab between his head and the pouring basin?

I think he said it was 88/10/2 gunmetal bronze, 88 copper, 10 tin, and 2 zinc.  I'm sure of the 2 percent zinc anyway.  Since he cuts off the heat at 2150 degrees to pour, I don't know how much of that zinc remains, I'm sure some boils off since it takes hours to get the metal to casting temperature.

One thing he pointed out is that it takes about $300. worth of propane to melt 600 lbs. of bronze.

I don't understand your second question about the gab.
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Offline 5toolman6

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Re: Casting metals
« Reply #13 on: April 25, 2008, 02:21:06 PM »
"I don't understand your second question about the gab."

Sorry it is suppose to be gap.
Why did he have about one inch space between the pouring cup, filter and the top of the mold?
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Offline GGaskill

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Re: Casting metals
« Reply #14 on: April 25, 2008, 04:17:25 PM »
Good question since the tech bulletins of FOSECO imply that the filter should be close to the cavity and arranged so no air gets to the metal after passing the filter.
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GG
“If you're not a liberal at 20, you have no heart; if you're not a conservative at 40, you have no brain.”--Winston Churchill

Offline 5toolman6

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Re: Casting metals
« Reply #15 on: May 03, 2008, 04:55:17 PM »
Quote from: 5toolman6 on April 25, 2008, 02:21:06 PM
"I don't understand your second question about the gab."

Sorry it is suppose to be gap.
Why did he have about one inch space between the pouring cup, filter and the top of the mold?


Talked to Bob Gillimore today about his pouring technique ... Said it works for him.
I can't argue if he is getting good results.  (Even it is not the way I learned how to do it.)
He really credits the alcohol base mold/core wash he uses for the really nice finish he gets.

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