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Re: [hobbicast] Re: Hello!

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  • Rupert
    Hello Graham, I m late reading messages and haven t noticed copper wire being mentioned. Short pieces with insulation stripped off works fine too specially the
    Message 1 of 56 , May 16 7:12 AM
      Hello Graham,
      I'm late reading messages and haven't noticed copper wire being
      mentioned. Short pieces with insulation stripped off works fine too
      specially the common sizes 14 ga and 12 gage.

      Rupert

      CaptonZap@... wrote:
      >
      > In a message dated 5/16/2009 3:04:43 AM Mountain Daylight Time,
      > graham_h_miller@... writes:
      >
      > As I'm into recycling as a part of the project and also quite broke I'll
      > start looking for scrap bits of plumbing copper pipe that I can weigh and add
      > in to the crucible when I melt...
      >
      > Graham
      >
      >
      >
      >
      >
      >
      > ----------------------------Reply---------------------------
      >
      >
      > Take a pair of tin snips and cut the copper into slivers before you add it
      > to the melt. It will take less time for it to be absorbed. CZ
      >
      >
      > **************Recession-proof vacation ideas. Find free things to do in
      > the U.S.
      > (http://travel.aol.com/travel-ideas/domestic/national-tourism-week?ncid=emlcntustrav00000002)
      >
      >
      > [Non-text portions of this message have been removed]
      >
      >
      >
      > ------------------------------------
      >
      > For discussion of Metal Casting and related issues
      > this list does not accept attachments.
      >
      > Files area and list services are at:
      > http://groups.yahoo.com/group/hobbicast
      >
      > For additional files and photos and off topic discussions
      > check out these two affiliated sites:
      > http://groups.yahoo.com/group/sandcrabs
      > http://groups.yahoo.com/group/Hobbicast1
      >
      > Please visit our sponsor: Budget Casting Supply
      > http://budgetcastingsupply.com/
      >
      > List Owner:
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      >
      > Yahoo! Groups Links
      >
      >
      >
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      --

      yvt

      Rupert Wenig
      Camrose, Alberta, Canada.

      email: rwenig2@...

      http://users.xplornet.com/~rwenig/Home/
    • Dan Brewer
      look at this site for some supplies. http://www.mcgillswarehouse.com/groupslist.aspx?CategoryID=109&CN=FiberBoard,Blanket,Paper Dan in Auburn On Mon, May 18,
      Message 56 of 56 , May 19 6:04 AM
        look at this site for some supplies.
        http://www.mcgillswarehouse.com/groupslist.aspx?CategoryID=109&CN=FiberBoard,Blanket,Paper

        Dan in Auburn

        On Mon, May 18, 2009 at 9:30 PM, Raymond Girard
        <rgirard@...>wrote:

        >
        >
        > Rick:
        >
        > Of what errors and omissions do you speak?
        >
        > Dan:
        >
        > I can buy the soft bricks locally but have to order and ship everything
        > else. I was planning to use the soft bricks for the face, and a certain
        > thickness (undecided) of the kastolite as the external shell. I am now
        > thinking to use a thinner wall of the refractory and use the inswool. Total
        > cost is about the same, but I get more product with less shipping as the
        > wool is lighter than refractory.
        >
        > Dave:
        >
        > We are in Las Vegas. Heat is not really a concern :). It broke 100
        > yesterday and frankly I'm not looking forward to this summer. I think its
        > gonna be a scorcher.
        >
        > Thanks to all for your help.
        >
        >
        > Raymond
        >
        > ----- Original Message -----
        > From: Rick Sparber
        > To: hobbicast@yahoogroups.com <hobbicast%40yahoogroups.com>
        > Sent: Monday, May 18, 2009 7:55 PM
        > Subject: RE: [hobbicast] Electric vs. gas furnace
        >
        > Raymond ,
        >
        > If you plan to follow Hartman's book, you might be interested in the
        > errors I found as I built mine. Nothing earthshaking but there were
        > some rather confusing omissions.
        >
        > Rick
        >
        > -----Original Message-----
        > From: hobbicast@yahoogroups.com <hobbicast%40yahoogroups.com> [mailto:
        > hobbicast@yahoogroups.com <hobbicast%40yahoogroups.com>] On
        > Behalf Of Raymond Girard
        > Sent: Monday, May 18, 2009 6:59 PM
        > To: hobbicast@yahoogroups.com <hobbicast%40yahoogroups.com>
        > Subject: Re: [hobbicast] Electric vs. gas furnace
        >
        > Howard:
        >
        > An interesting point. How thick would you suggest for the refractory
        > face and insulating wool.
        >
        > I have a copy of Dan Hartman's Electric Furnace plans and intend to
        > modify them slightly to fit my needs.
        >
        > Again, thanks to all for the input.
        >
        > ----- Original Message -----
        > From: Stone Tool
        > To: hobbicast@yahoogroups.com <hobbicast%40yahoogroups.com>
        > Sent: Monday, May 18, 2009 6:50 PM
        > Subject: Re: [hobbicast] Electric vs. gas furnace
        >
        > It is rather illogical to have a massive body of refractory that
        > gets
        > heat soaked during the melt and sits radiating heat for hours
        > afterward.
        > Other than for the ruggedness of the refractory, it would be far
        > more
        > logical to use KO Wool with the surface coating. The coating would
        > create more rugged and rigid surface. KO wool has tremendous
        > insulation
        > capacity, and is very low density. The result would be to keep your
        > heat
        > inside the furnace heating the crucible... not the furnace walls.
        >
        > Howard
        >
        > Raymond Girard wrote:
        > > On this note. Is there any such things too much insulation?
        > >
        > > The refractory seems act both and an insulator keeping the inside
        > hot, but also as a heat repository. When the burner is off, the kiln
        > will remain hot because the refractory is hot. The more refractory,
        > the more energy it takes to get from cold to hot, but the longer it
        > will stay hot.
        > >
        > > I mean, going to an insane extreme, if you had three feet of
        > refractory would there be very little heat loss once the kiln got to
        > temp? Sure it would take some time to heat that much up, but it would
        > stay hot for some time, would it not? This would allow subsequent
        > pours to go much faster.
        > >
        > > Thanks for the input.
        > >
        > >
        > >
        > > ----- Original Message -----
        > > From: Rick Sparber
        > > To: hobbicast@yahoogroups.com <hobbicast%40yahoogroups.com>
        > > Sent: Sunday, May 17, 2009 8:47 PM
        > > Subject: RE: [hobbicast] Electric vs. gas furnace
        > >
        > >
        > >
        > >
        > >
        > > Raymond,
        > >
        > > Melt speed is the big one IMHO. Of course, you do need a
        > sufficient
        > > source of power.
        > >
        > > There are some secondary issues. The heating element will
        > eventually
        > > burn out and need replacing. With care it should last years. You
        > > should also use better insulation than with a gas furnace. I used
        > > backing refractory and faced with fire brick but with gas many use
        > > facing refractory.
        > >
        > > Rick
        > >
        > > -----Original Message-----
        > > From: hobbicast@yahoogroups.com <hobbicast%40yahoogroups.com> [mailto:
        > hobbicast@yahoogroups.com <hobbicast%40yahoogroups.com>]
        > On
        > > Behalf Of Raymond Girard
        > > Sent: Sunday, May 17, 2009 6:34 PM
        > > To: hobbicast@yahoogroups.com <hobbicast%40yahoogroups.com>
        > > Subject: Re: [hobbicast] Electric vs. gas furnace
        > >
        > > Thank you all for the 2p's. I almost have enough to build a new
        > > furnace. ;)
        > >
        > > So the only downside is the melt speed?
        > >
        > > Raymond
        > >
        > > ----- Original Message -----
        > > From: Rick Sparber
        > > To: hobbicast@yahoogroups.com <hobbicast%40yahoogroups.com>
        > > Sent: Sunday, May 17, 2009 11:32 AM
        > > Subject: RE: [hobbicast] Electric vs. gas furnace
        > >
        > > Jeshua,
        > >
        > > Sorry for the poor wording. I meant to say that the BIG
        > disadvantage
        > > to electric is how SLOW it is to melt the metal. I know that
        > burning
        > > used motor oil takes about 8 minutes for the first melt.
        > >
        > > Rick
        > >
        > > -----Original Message-----
        > > From: hobbicast@yahoogroups.com <hobbicast%40yahoogroups.com> [mailto:
        > hobbicast@yahoogroups.com <hobbicast%40yahoogroups.com>]
        > > On
        > > Behalf Of Jeshua Lacock
        > > Sent: Sunday, May 17, 2009 11:18 AM
        > > To: hobbicast@yahoogroups.com <hobbicast%40yahoogroups.com>
        > > Subject: Re: [hobbicast] Electric vs. gas furnace
        > >
        > > On May 17, 2009, at 9:33 AM, Rick Sparber wrote:
        > >
        > > > The BIG disadvantage is speed. My first melt of the day takes
        > > around
        > > > 90 minutes and subsequent melts take about 45 minutes with a
        > full
        > > > charge of metal. By planning ahead, I rarely wait for the
        > furnace
        > > > since there is so much to do.
        > >
        > > Rick,
        > >
        > > No offense, but 90-minutes for a first melt is not very fast
        > > compared
        > >
        > > to propane (might be compared to charcoal).
        > >
        > > When I run on propane at only 10-psi, I start melting in about 15
        > > minutes from a cold furnace, and I can pour within 30-minutes. If
        > I
        > > bump it up to 15-psi, it starts melting in about 10 minutes.
        > >
        > > Best,
        > >
        > > Jeshua Lacock, Owner
        > > <http://OpenOSX.com>
        > > phone: 877.240.1364
        > >
        > > [Non-text portions of this message have been removed]
        > >
        > > ------------------------------------
        > >
        > > For discussion of Metal Casting and related issues
        > > this list does not accept attachments.
        > >
        > > Files area and list services are at:
        > > http://groups.yahoo.com/group/hobbicast
        > >
        > > For additional files and photos and off topic discussions
        > > check out these two affiliated sites:
        > > http://groups.yahoo.com/group/sandcrabs
        > > http://groups.yahoo.com/group/Hobbicast1
        > >
        > > Please visit our sponsor: Budget Casting Supply
        > > http://budgetcastingsupply.com/
        > >
        > > List Owner:
        > > owly@... <owly%40ttc-cmc.net>
        > >
        > > Yahoo! Groups Links
        > >
        > >
        > >
        > >
        > >
        > > [Non-text portions of this message have been removed]
        > >
        > >
        > >
        > > ------------------------------------
        > >
        > > For discussion of Metal Casting and related issues
        > > this list does not accept attachments.
        > >
        > > Files area and list services are at:
        > > http://groups.yahoo.com/group/hobbicast
        > >
        > > For additional files and photos and off topic discussions
        > > check out these two affiliated sites:
        > > http://groups.yahoo.com/group/sandcrabs
        > > http://groups.yahoo.com/group/Hobbicast1
        > >
        > > Please visit our sponsor: Budget Casting Supply
        > > http://budgetcastingsupply.com/
        > >
        > > List Owner:
        > > owly@... <owly%40ttc-cmc.net>
        > >
        > > Yahoo! Groups Links
        > >
        > >
        > >
        > >
        >
        > [Non-text portions of this message have been removed]
        >
        > ------------------------------------
        >
        > For discussion of Metal Casting and related issues
        > this list does not accept attachments.
        >
        > Files area and list services are at:
        > http://groups.yahoo.com/group/hobbicast
        >
        > For additional files and photos and off topic discussions
        > check out these two affiliated sites:
        > http://groups.yahoo.com/group/sandcrabs
        > http://groups.yahoo.com/group/Hobbicast1
        >
        > Please visit our sponsor: Budget Casting Supply
        > http://budgetcastingsupply.com/
        >
        > List Owner:
        > owly@... <owly%40ttc-cmc.net>
        >
        > Yahoo! Groups Links
        >
        > [Non-text portions of this message have been removed]
        >
        >
        >


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