37622Re: Mobile Foundries...Does Anyone Have One?
- Apr 2, 2007HW:
I can post a photo of my pouring bench. My biggest mistake was to
make it the same height as my molding bench thinking that I wouldn't
have to bend over to place the molds. Just move them sideways onto
the pour bench. Well, that works for aluminum but pouring 40 lbs of
bronze with a one man shank you need it to be lower. The one good
thing about my bench though is that it doubles as a welding bench by
flopping a 1/4" piece of plate steel onto it.
--- In email@example.com, Stone Tool <owly@...> wrote:
> My furnace is not of conventional design....... It uses a
> (hand crank) to lift the upper body..... this winch is a worm drive
> and cannot freewheel. The furnace body is mounted to a carriage
> travels up a square tube post (2x2x.25). The carriage uses cable
> pulleys as wheels.... fairly large pulleys (5") with bronze
> that run on 1/2" round rod welded to opposite corners of the square
> to make a track. A very simple way of making accurate smooth
> The furnace body is mounted in a manner that allows it to swing
> the side on hinges completely away from the crucible leaving the
> crucible standing completely in the open atop the plinth. The
> away is the crucial design feature which allows you to do anything
> want with nothing in the way.... but also ensures that if you knock
> over it is going to spill molten metal all over the floor rather
> into the furnace base which has a low wall around it after the body
> lifted off..... this wall extends only slightly above the level of
> The swing away system is designed in such a way that you
> it until the body is entirely clear of the crucible......and also
> that once it is swung at all it cannot come down as it is
> blocked from coming down. There is absolutely no risk of dropping
> furnace body inadvertently....... none. Conventional tongs and
> shank work just as they would in an ordinary furnace except that
> not have to lift the crucible up and out, just lift it an inch or
> swing it over to set it in the pouring shank.
> The winter before last I built a large tilting furnace for an
> friend...... I'm not sure how much aluminum it would contain but it
> would be measured in gallons. This furnace is skid mounted but
> easily be mounted on wheels. I uses a steel crucible which is more
> less permanently attached..... made from seamless steel tubing with
> angle iron pour spout that ends at a point that does not change as
> furnace is tilted. The furnace uses a rammed plastic refractory
> and lid with stabilized KOwool above the "blast zone".
> the lady took one look at the monstrosity...... she wanted
BIG ..... and
> said she could not pour molten metal without hand pouring from a
> crucible, and that it was way too high off the floor to
> had discussed the tilting design beforehand... but she is more than
> little fickle. My intent was to have a molding bench / sand
> pouring bench at a decent working height where the mold would rest
> would roll easily and smoothly on the concrete floor to position
> sprue(s) under the spout leaving a few inches of pour height.....
> easy job.
> I built a suitably massive burner to feed the furnace.... a
> takes several 100 lb bottles to feed it, but have never fired the
> furnace...... the winch system for pouring turned out not to my
> satisfaction and needs redesign, but all that remains is to build
> molding bench and redesign the pouring mechanism. I walked away
> disgust after her rejection of the entire design....... but hope
> eventually to complete it for my own use....... It is capable of
> some pretty large pours. It was my intent to do a crucible wash
> extend crucible life....... the crucible is fairly thick
> wonder how long it will take to burn out.........
> My thinking is that the bench would need to be adjustable
> not a real problem, and that the furnace would be intended to do
> multiple pours on one heat...... I can imagine what shrinkage
> would show up with very large single pours.
> It's a shame that the furnace sits unfired........ someday!
> Lyle wrote:
> > Your right but he was talking about a Johnson furnace. I've
> > been a little leary (and perhaps wrongly) about lift up body
> > furnaces. Mental picture of taking the crucible out just as the
> > falls down onto the shank, crucible, etc. Of course, my lift out
> > furnace necessitates my melt being about crotch high when I lift
> > out and the shanks lock but there's some danger there too. I've
> > seen any shanks like your talking about except for those bent
> > lift/pour shanks that are used for smaller sized crucibles. ?They
> > wouldn't work for larger sizes though. I use one on a number 4
> > crucible I have for a little furnace.
> > How do you get your lift out shank around the crucible on that
> > body furnace? Usually they grab the crucible from the top...?
> > LL
> > --- In firstname.lastname@example.org, Stone Tool <owly@> wrote:
> >> The height of the furnace ceases to be an issue if you have one
> > with a
> >> lift off body rather than using a "lift out" crucible. Mine is
> > iron
> >> wheels from some kind of farm implement..... about 18" diameter
> > steel
> >> spoke wheels actually, and the furnace body lifts clear of the
> > and
> >> swings out of the way. A tilting furnace might also work well
> >> mobile unit. The next upgrade must be a lift & pour tong that
> >> allow you to lift the crucible directly off the plinth and pour
> > without
> >> setting it in a pouring shank. I envision a steel ring that you
> > drop
> >> over the crucible first, and jaws that close around the lower
> > portion.
> >> The idea of dropping the ring over first is to reduce the risk
> >> tipping the works over. Anybody seen anything like this?
> >> H.W.
> >> Lyle wrote:
> >>> I'll take a photo of my MIFCO 16 on a homemade cart that I've
> > welded up.
> >>> and post tonight. The biggest idea is to keep it as low as
> > possible.
> >>> LL
> >>> --- In email@example.com, "too_many_tools"
> > <too_many_tools@>
> >>> wrote:
> >>>> I have a Johnson foundry furnace that I would like to make
> > mobile and
> >>>> am looking for ideas as to how to build the foundry cart. I
> > envision
> >>>> having the furnace and supporting equipment on a cart where
> >>> foundry
> >>>> can be used and then stored.
> >>>> Has anyone done this?
> >>>> If so, I would appreciate your advice and pictures of how you
> >>>> implemented it.
> >>>> Thanks
> >>>> TMT
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