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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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New to group
Hello all, I am new to this group. I am on some other groups through
Yahoo...not sure if there is much over lap here. I do metal casting on a hobby level. I have done lost foam, lost wax, greensand, RTV, and oil bonded sand casting. Here is a link to my web site which shows my projects: http://metalshop.homestead.com Dave PS: Make sure you check out the riddle. |
#2
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Very nice castings. And good point on making something at the cost of
$100 that could be bought for $10... i |
#3
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Fun site; nice work
thanks JR Dweller in the cellar metalshop wrote: Hello all, I am new to this group. I am on some other groups through Yahoo...not sure if there is much over lap here. I do metal casting on a hobby level. I have done lost foam, lost wax, greensand, RTV, and oil bonded sand casting. Here is a link to my web site which shows my projects: http://metalshop.homestead.com Dave PS: Make sure you check out the riddle. -- -------------------------------------------------------------- Home Page: http://www.seanet.com/~jasonrnorth If you're not the lead dog, the view never changes Doubt yourself, and the real world will eat you alive The world doesn't revolve around you, it revolves around me No skeletons in the closet; just decomposing corpses -------------------------------------------------------------- Dependence is Vulnerability: -------------------------------------------------------------- "Open the Pod Bay Doors please, Hal" "I'm sorry, Dave, I'm afraid I can't do that.." |
#4
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"Ignoramus29233" wrote in message ... Very nice castings. And good point on making something at the cost of $100 that could be bought for $10... i Ain't that the truth. My wife reps lines of household goods. She got a new catalog the other day from a manufacturer that makes plant stands, wall hanging shelves, ornamental metal items. Mostly out of curved small rods, and some light angle and flat bar. I could make the exact same thing, but it would take me hours and hours to do it. We bought one REALLY nice looking 3' gate once to keep the grandkids from going up the stairs. It was solid 1/4" square bar, lots of stamped designs, lots of twisted spirals, etc. It was $43. I couldn't have built it in three days, and didn't have the equipment for making the spirals and bends. Had a really nice layered color paint job, too. Steve |
#5
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New to group
"metalshop" wrote in message ups.com... Hello all, I am new to this group. I am on some other groups through Yahoo...not sure if there is much over lap here. I do metal casting on a hobby level. I have done lost foam, lost wax, greensand, RTV, and oil bonded sand casting. Here is a link to my web site which shows my projects: http://metalshop.homestead.com Dave PS: Make sure you check out the riddle. Interesting site! Welcome to the group even though I am not an official welcome, just an occasional poster, frequent lurker. I never heard of lost foam. I have an investment casting setup in my shop and cast aluminum and bronze from time to time. Use the lost wax method. I imagine you burn out the foam the same as you would the wax? How do you maintain a nice slick surface finish without using self skinning urethane foams? Wayne www.pueblaprotocol.com |
#6
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"Wayne Lundberg" wrote in message ... snip----- I imagine you burn out the foam the same as you would the wax? How do you maintain a nice slick surface finish without using self skinning urethane foams? Dry sand is poured around the pattern, which is foam board (pink or blue insulation board) or a pattern made from polystyrene bead, and then the metal is introduced, which burns away the form and replaces it. It sounds like it wouldn't work, but they're doing some pretty decent casting that way. Harold |
#7
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On Mon, 17 Sep 2007 03:12:28 GMT, "Harold and Susan Vordos"
wrote: "Wayne Lundberg" wrote in message ... snip----- I imagine you burn out the foam the same as you would the wax? How do you maintain a nice slick surface finish without using self skinning urethane foams? Dry sand is poured around the pattern, which is foam board (pink or blue insulation board) or a pattern made from polystyrene bead, and then the metal is introduced, which burns away the form and replaces it. It sounds like it wouldn't work, but they're doing some pretty decent casting that way. Harold I don't know how old the technique is (lost foam), but some of the guys were messing around with it over 30 years ago in my high school shop class. Pretty much everything we cast back then was aluminum, no other metals that I knew of. Sure wish I could go back in time and make better use of that opportunity with what I know (or think I know now. I did make a pretty cool split mold meat tenderizer for one of my class projects. Milled the heads from aluminum and spun the rest of it on a lathe in the wood shop. Pegged and split it down the center of the handle. I suspect the teacher held on to that one for show & tell/examples in future classes. He was a bit dubious of it until seeing the finished item. -- Leon Fisk Grand Rapids MI/Zone 5b Remove no.spam for email |
#8
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"Leon Fisk" wrote in message ... On Mon, 17 Sep 2007 03:12:28 GMT, "Harold and Susan Vordos" wrote: "Wayne Lundberg" wrote in message ... snip----- I imagine you burn out the foam the same as you would the wax? How do you maintain a nice slick surface finish without using self skinning urethane foams? Dry sand is poured around the pattern, which is foam board (pink or blue insulation board) or a pattern made from polystyrene bead, and then the metal is introduced, which burns away the form and replaces it. It sounds like it wouldn't work, but they're doing some pretty decent casting that way. Harold I don't know how old the technique is (lost foam), but some of the guys were messing around with it over 30 years ago in my high school shop class. Pretty much everything we cast back then was aluminum, no other metals that I knew of. The first I heard of it was at about the same time, maybe 1978, when I was an editor at _American Machinist_. My vague recollection was that it first came as a press release from Ford Motor Company about work they were doing with the process. -- Ed Huntress |
#9
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On Mon, 17 Sep 2007 16:08:17 -0400, "Ed Huntress"
wrote: snip Lost Foam description The first I heard of it was at about the same time, maybe 1978, when I was an editor at _American Machinist_. My vague recollection was that it first came as a press release from Ford Motor Company about work they were doing with the process. This would have been ~1976 and I doubt if a high school shop class was using any cutting edge techniques -- Leon Fisk Grand Rapids MI/Zone 5b Remove no.spam for email |
#10
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"Leon Fisk" wrote in message ... On Mon, 17 Sep 2007 16:08:17 -0400, "Ed Huntress" wrote: snip Lost Foam description The first I heard of it was at about the same time, maybe 1978, when I was an editor at _American Machinist_. My vague recollection was that it first came as a press release from Ford Motor Company about work they were doing with the process. This would have been ~1976 and I doubt if a high school shop class was using any cutting edge techniques Now that I'm thinking about it, I also saw mention of it somewhere else at about the same time. It may have been Caterpillar. Anyway, the idea was around, and people were experimenting with it. Ford had pioneered the production "thin-wall" casting of iron with their Fairlane/Mustang/Cobra etc. small-block (221, 260, 289, etc.) as early as 1961 or so and they were in the forefront of production casting technology at the time. -- Ed Huntress |
#11
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On Mon, 17 Sep 2007 16:36:45 -0400, "Ed Huntress"
wrote: "Leon Fisk" wrote in message .. . On Mon, 17 Sep 2007 16:08:17 -0400, "Ed Huntress" wrote: snip Lost Foam description The first I heard of it was at about the same time, maybe 1978, when I was an editor at _American Machinist_. My vague recollection was that it first came as a press release from Ford Motor Company about work they were doing with the process. This would have been ~1976 and I doubt if a high school shop class was using any cutting edge techniques Now that I'm thinking about it, I also saw mention of it somewhere else at about the same time. It may have been Caterpillar. Anyway, the idea was around, and people were experimenting with it. Ford had pioneered the production "thin-wall" casting of iron with their Fairlane/Mustang/Cobra etc. small-block (221, 260, 289, etc.) as early as 1961 or so and they were in the forefront of production casting technology at the time. ======== google on "lost foam" for 163k hits to start click on http://www.lostfoam.com/content/feat...s/article1.php http://en.wikipedia.org/wiki/Lost-foam_casting http://ezinearticles.com/?Lost-Wax-a...sses.&id=85804 http://www.enigmetallic.com/LFMC.htm http://www.sculpture.net/community/a...hp/t-4880.html some tips on improving surface finish http://www.theworkshop.ca/metcastmac...FMC4/LFMC4.htm Unka' George [George McDuffee] ============ Merchants have no country. The mere spot they stand on does not constitute so strong an attachment as that from which they draw their gains. Thomas Jefferson (1743-1826), U.S. president. Letter, 17 March 1814. |
#12
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"F. George McDuffee" wrote in message ... snip google on "lost foam" for 163k hits to start click on http://www.lostfoam.com/content/feat...s/article1.php http://en.wikipedia.org/wiki/Lost-foam_casting http://ezinearticles.com/?Lost-Wax-a...sses.&id=85804 http://www.enigmetallic.com/LFMC.htm http://www.sculpture.net/community/a...hp/t-4880.html some tips on improving surface finish http://www.theworkshop.ca/metcastmac...FMC4/LFMC4.htm Good stuff, George. Thanks. -- Ed Huntress |
#13
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On Sep 16, 1:23 pm, "Wayne Lundberg"
wrote: "metalshop" wrote in message ups.com... Hello all, I am new to this group. I am on some other groups through Yahoo...not sure if there is much over lap here. I do metal casting on a hobby level. I have done lost foam, lost wax, greensand, RTV, and oil bonded sand casting. Here is a link to my web site which shows my projects: http://metalshop.homestead.com Dave PS: Make sure you check out the riddle. Interesting site! Welcome to the group even though I am not an official welcome, just an occasional poster, frequent lurker. I never heard of lost foam. I have an investment casting setup in my shop and cast aluminum and bronze from time to time. Use the lost wax method. I imagine you burn out the foam the same as you would the wax? How do you maintain a nice slick surface finish without using self skinning urethane foams? Waynewww.pueblaprotocol.com No, that is what makes lost foam so easy...there is no burn out. You simply pour the metal into the foam and the metal evaporates the foam and takes it's place. It isn't easy to get a good finish however...some people use a thin coating of drywall mud to help keep the surface nice and smooth. Also, using a foam that has a small bead makes the finish nicer. Dave |
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