[modeleng] Re: Casting Questions
- From: "Bob Logan" <boblogan@xxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Thu, 12 May 2005 09:36:55 +1200
I would put about an inch of sand, just damp, over a concrete floor. The
best foundry I saw, had a dirt floor, and the foundry that I started my
apprenticeship, ( that nearly killed me,) had a deep sand floor, I did get
to dig about eight foot deep, doing a Propellor for a steam ship, circa,
1950.
Charles, Jesse, I never had problems of "bedding in" 'Boxes,' on a sand
floor, as you place 'box' down, wiggle and rotate, left & right, untill you
get 'box' level and down in sand. Before iron ( bronze, alloys, ) is
poured, clamp 'boxes' or put weights on clear of " pour gate."
The Book, should be in all good district Public Libraries. My local
library has two well thumbed copies.
Bob.
----- Original Message -----
From: "Charles & Dorothy Brumbelow" <cbrumbelow@xxxxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Saturday, May 07, 2005 12:47 AM
Subject: [modeleng] Casting Questions
> First -
>
> All "the books" say one should not set up to melt and pour aluminum or
other
> high melting temperature metals on a concrete floor, because when (not if)
> there is a spill the moisture within the concrete will turn to steam with
> explosive force, sending shrapnel flying.
>
> A sand working area is recommended.
>
> What happens if the sand is damp and molten metal is spilled on it?
>
> Second -
>
> When the mold ready for pouring is being moved from the bench where it was
> rammed up to the place where the metal will be poured, should it be
carried
> on and later set on top of a board to keep the rammed sand from falling
out
> or getting collapsed by irregularities in the sand floor? This would be a
> board such as is used when the cope or drag is being flipped for pattern
> removal.
>
> Thanks, Charles
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