the thing i found out about p-bond is that : as the trmpature of the pour increases you burn out the binder (bentone) and it needs to be replaced so by the...
Ray I don't think they make VG-69 any more geltone 5 was available and it's cost was about $2.00/lb but the stuff made for petrobond (it's called petrobond ...
After burning the wax out of my first flask @ 500° in the kitchen oven I found a way to get the flask completely burnd clean. I set it on top of the melting...
Thank you ....very straight forward ! regards, Peter Sibley ... From: "Edyn" <edynm@...> To: <hobbicast@yahoogroups.com> Sent: Saturday, May 01, 2004...
The STLmetal@yahoogroups.com guys are having a small swap meet in St. Louiss, Mo. this Sunday! Haven't seen mention of that here! Thought I might let you...
I use burners that are so quiet they just Purr and they give me all the heat I would ever need. They don't heat up the nozzle to a red heat and are used by...
The burnes that ou re using rely on a large secondary source of air. The flame is soft and is set up for a long heat. It is also a sligly reducing flame. A...
If I spray some co2 into my crucible before melting the aluminum, will it help prevent oxidization? Or would it not make any differnece. I have a small co2...
Hello everyone. Some time ago I was surfing the groups and come across a file thet explained the different types of metal in junkyard scrap,like auto parts...
On my very first monster burner I built I had it undersized on the fuel jet opeing. It roared like a Japaneese Kamakazee aircraft engine on his final dive....
Don't use PB1, go with PB2. Its easier and cheaper overall to make and use. PB1 requires a catylyst, PB 2 does not. All you need to add besides sand to PB2 is...
All the castable I have used cautions about over raming the mix as it is designed to have some air entrainment space. Couple of folks that reline commercial...
I wish I knew. All I know is I ran across a page selling patents for making steel from scrap metals using a cupola. But, I went back when I had the $5 dollars...
Well, I'm starting to agree. In fact, it makes complete sense that the burn tube should not be heating at all. I'll have to check that next time I fire up. ...
... from ... dollars to ... necessarily have ... we all ... You can look up all patents on the web. I dont have the link bookmarked or i'd give it to you. Its...
I'm actually in the process of making a cupola form Steve chastain's book. I have stewart marshall's book also. Even have a third one on industrial size...
The flare/nozzle is needed to allow the mixture of gas and air to slow down in a controlled fashion. Also if you have a flare/novel on the burner the flame...
I would Love to hear what you find out on the metals. We should probably set up a database on one of the groups for exactly this kind of information and for...
Hi all, I was wondering if anyone has experienced a weird colouring on a brass casting. The rod is cast in greensand mold, melted in homebrew LP gas furnace,...
I don;t think you would have anyhting to worry about as far as getting black lung disease from burning coke. Black lunk is not obtained from the moke but from...
... You can use charcoal for a cupola. Charcoal was used extensively in the past. You would use a lot of it from what I understand. There is a cupola...
I've used, with success, plain glass, borax, and the brass/bronze flux from Budget Casting Supply. Can't honestly say I've seen much difference, though the...
Randy...... Maybe you could put all of this info into a word doc. and post it in the files section of Hobbicast???? Seems it would save a lot of keyboarding...
I have a refractory furnace that I was using a monster sized blower on. It would almost float a brick above the furnace opening and could be heard 1/2 mile...
Snip>>>>>>>>>>>>>> ... good place ... the steel ... Emmissions can be reduced by a few design features. Kirk's book has a few of the early primitive smoke...
... It looks to me like you might have just pulled it out a bit early and got some light surface oxidation. Give a piece of scrap a bit of a polish and see if...
One of the most effective and certainly the cheapest flux for melting copper base alloys is crushed glass. I end up using wine bottles, since that is my ...
Carbon Dioxide will not prevent your crucibles from oxidizing. Assuming that your crucibles are iron or steel, the only thing that will prevent them from being...
OK, guys. I haven't been active in the discussions for a while, so I owe you this. Sources of known to be good casting scrap from autos. Aluminum - Intake...
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