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Mission Statement |
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METAL CASTING - MELTING STEEL |
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Metal castings are used by most people
everyday but very few have any idea of
what they are or how they are made. To
that end we have prepared the following to help
better understand the casting process. |
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The melting process begins with
the customer’s metal
specification for the casting,
which determines what type of
scrap metal will be used to
‘charge’ the furnace. Once
charged, the furnace uses three
electrodes, each supplying 6,500
amps of electricity, to melt the
scrap metal. At various points
in the melt process, samples are
taken to determine the chemical
composition of the molten metal.
Using a Spectrometer as a guide,
alloys are added to the furnace
to bring the molten metal in the
proper specification. |
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Once the metal is within the
desired specification, and at a
temperature near 3,000 degrees
F., it is poured into a
preheated ladle for transfer to
the pouring lines. |
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At the pouring lines, molten
metal is ‘poured’ into the
appropriate molds. Due to the
lifting pressure of molten
steel, molds will often be
‘weighted’ or ‘clamped’ to
prevent them from separating at
the Cope/Drag meeting point.
After pouring, the mold is
allowed to cool for
approximately 30 minutes before
it is taken to the shakeout. At
SWS, poured molds are dumped
into a vibrating conveyor. In
the conveyor, the molds are
broken up by the vibration,
which exposes the casting for
removal. The sand from the mold
is separated and process through
a reclamation system for reuse
in mold and core making. |
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