The Shop > Metal Stuff

Electric Heat Treating Oven

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unc1esteve:
Assembled the one layer of soft brick with
a cut off hard brick as the bottom.  I thought
while putting it together that if I turned it
over I could use it as a furnace to melt aluminum.

unc1esteve:
After waiting for the proscribed period for the wire I
contacted them.  They told me the wire was out of stock
and they would ship it in a few days.  I told them this was not
acceptable.  After a few emails I received the wire.
http://www.ebay.com/itm/281091127057?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

I estimated the length of the wire and wound it on the lathe
using a 7/16 bar.  It would have been easier to wind if I had
cut the wire in half but I did not think about that until I tried
to wind it from the roll.  I uncoiled it to about 3/8 between the
coils by mounting the bar in the vise and streaching the wire
over the bar.  This gave a much nicer finished coil.

unc1esteve:
Having trouble with my old cell phone camera.
Lost a few pictures

I fitted the coil around the bricks.

unc1esteve:
I finished the assembly and made a covering
from some sheet metal I salvaged from a
refrigerator.  I made the door.  I used a piece
of the broken hard brick to fit into the opening.
Tapered the edges with the table saw/  I did this
so I would have more insulation at the door.
Attached it to the soft brick with cement, then set
the oven on top of it to cure the cement.

unc1esteve:
I ordered this control.
http://www.budgetcastingsupply.com/Heating-Element-Control-Basic.php

While thinking about the door attachment I did a
test heating.  I set a large chisel in the oven and
prepared a coffee can of oil.

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