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10-19-2018, 06:20 PM | #3 | ||||||
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Brian, that piece was made in the Cherry St. foundry. My grandfather was the superintendent of the foundry for a few years before he went off on his own. The recipes used by the molders (molders always mixed their own sand in those days) have been lost because modern foundries, with the exception of a very few, have all gone “no-bake” meaning they use resin bonded sand.
Green sand, which wasn’t green, was medium fine silica sand, mixed with cereal flower, bentonite clay, and water. A common practice was to use 10-15% horse manure also. Finer sands could be used in the green sand process which allowed for very good surface finish. Chemically bonded sands require a coarsersand because of the escaping gasses created by burning off the resins. While our company stopped using the green sand process, it is still used in the art casting shops in France. |
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The Following 23 Users Say Thank You to edgarspencer For Your Post: | Bill Mullins, Bill Murphy, Bob Kimble, Brian Hornacek, chris dawe, Dave Suponski, Eldon Goddard, Eric Estes, Gary Carmichael Sr, Jacob Duke, John Knobelsdorf II, keavin nelson, Lloyd Bernstein, Mark Ray, Marty Kohler, Paul D Narlesky, Richard Flanders, Rick Losey, Robert Brooks, Russell E. Cleary, Scott Smith, tom leshinsky, Tom Pellegrini |
10-20-2018, 09:40 PM | #4 | ||||||
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great find for sure...charlie
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10-21-2018, 06:15 PM | #5 | ||||||
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Brian, Is you cast plaque 5 3/4" X 4" ?
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10-21-2018, 06:17 PM | #6 | ||||||
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Yeah. Pretty much. More like 5-7/8” long.
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B. Dudley |
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10-21-2018, 08:30 PM | #7 | ||||||
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Republic Iron Works were the largest supplier of pig iron to the foundry industry, for many years. Some time a while back, I wrote an article in PP about the iron melting cupola, with basics of how it worked, and what it was fed with. The main ingredient used in smaller foundries was, naturally, pig iron. Larger foundries and melting shops used iron ore and alloyed with Silicon and manganese. The Cherry St. foundry, being quite small, bought pig iron, and most probably from Republic. The salesmen would visit these shops on a very frequent basis, because margins were low, and there was competition. Naturally, these salesmen brought loads of goodies, like the tape measure, and pocket pads with risque' ladies on the cover. I remember my dad finding his fathers collection of these, hidden from my grandmother, and dad thought he had them well hidden from me. Ha!
The tape measure is interesting, if only to me,in that it has both std. rule scales and shrink rule (for iron) which was 1/8" longer, per foot than standard. This was for the pattern maker to use, so that the IRON casting, which would shrink, on solidification, by that 1/8" to the foot. The Last Supper casting seems pretty out of character for novelty items a foundry might make for their salesmen to hand out, like the Parker Bear, or the tiny vise. The real reason this particular casting was chosen is only meaningful to old time foundrymen, and by old, I mean a lot older than my 71 years. As you can see, the small casting exhibits pretty fine detail, and for that reason, it was used as a test for molders, who as I said earlier, prepared their own molding sand. The degree of detail was somewhat used to determine the molder, A, could loose mold the piece, and B, with a sand that would impart the detail. No one even dared breath the fact that the melting department was equally responsible in fluxing and delivering to the pouring crew a molten metal that would also impart the detail. The identification tape cast into the rear of the piece is an aluminum tape, made in the pattern department, and attached to patterns for just that purpose. That feature would indicate to me your pieces was made post WW1. |
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10-21-2018, 08:36 PM | #8 | ||||||
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So, you own a last supper casting as well? And that one is 8” long? I see that yours is different from mine in some of the small details.
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B. Dudley |
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10-21-2018, 10:17 PM | #9 | |||||||
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Quote:
I didn’t study the two in great detail, but they are very close. Mine has no lettering on the back. |
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10-22-2018, 08:24 AM | #10 | ||||||
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Not exactly lined up, but you get the idea.
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