Wonk,
Yes, we are mostly a club of machinists although at least 3 of us do
casting. I find lost foam interesting but get such good results from
Petrobond, I'm not about to switch.
Rick
-----Original Message-----
From: gingery_machines@yahoogroups.com
[mailto:gingery_machines@yahoogroups.com] On Behalf Of Wonk
Sent: Saturday, April 02, 2011 4:05 PM
To: gingery_machines@yahoogroups.com
Subject: [gingery_machines] Re: Shaper patterns for sale on ebay
Thanks Rick!
That casting party looks like many we have attended here in the Pacific
Northwest! The garbage can furnace is much like the first one I made to burn
charcoal! I use a much smaller but bigger crucible furnace now since I have
read Mike Porters book and switched to propane. I believe your club is more
for machinists than casting so many probably have lathes and mills to make
the castings work! The example near the end looked pretty rough but the
machined version looked great. One day I will have to give lost foam a try!
Cheers Wonk
--- In gingery_machines@yahoogroups.com, "Rick Sparber" <rgsparber@...>
wrote:
>
> Wonk,
>
> Here are some pictures from my club, Valley Metal:
>
> http://www.valley-metal.org/Lost%20Foam%20Casting/index.htm
>
> Rick
>
> -----Original Message-----
> From: gingery_machines@yahoogroups.com
> [mailto:gingery_machines@yahoogroups.com] On Behalf Of Wonk
> Sent: Saturday, April 02, 2011 1:38 PM
> To: gingery_machines@yahoogroups.com
> Subject: [gingery_machines] Re: Shaper patterns for sale on ebay
>
> I would like to see some examples of the lost foam Gingery castings, have
> you guys made some? Or really any castings from foam would suffice so we
can
> see how that works!
>
> Wonk
>
> --- In gingery_machines@yahoogroups.com, "Chris (CB)" <boyercl@> wrote:
> >
> > The advantages with foam are simplicity of pattern making.
> >
> > Draft -- dont need it.
> > Undercuts and weird shapes -- not a problem..
> > Foam is relatively cheap.
> > Easy to work with the most basic of tools.
> >
> > If its a 1 of piece foam may often be easier.
> >
> > It you need 100 of them thats a different story...
> >
> > Yes you loose a pattern if there is a problem.
> >
> > So start with simple patterns till you learn to cast foam...
> >
> > On 4/2/2011 12:43 PM, Wonk wrote:
> > > I don't see the advantage with foam over wood patterns unless you
don't
> want to ram sand moulds! Also the other problem if something goes wrong
your
> pattern is also gone, where-as with wood you can cast many times! I agree
> with the previous post that if you can figure how to machine metal, wood
> should be easy? I used the hobby store bass wood which seems to be
> dimensionaly sound and easy to cut with hand tools, glues great and once
> sealed with several coats of varnish seems to hold its shape well even
when
> packed away for several years.
> > > I'm making my third set of castings from the original patterns
starting
> in the 70's to present. I rarely hear that someone is sharing patterns or
> selling - works of art and should be kept for show and tell! Ha!
> > >
> > > Cheers
> > >
> > > --- In gingery_machines@yahoogroups.com, Ron Thompson<ron@> wrote:
> > >> On 4/2/2011 11:47 AM, Wonk wrote:
> > >>> Ron how do you maintain accuracy with lost foam? would seem you
would
> > >>> have to cast a bit oversize and machine until your there? I guess
CNC
> > >>> comes into play but then you have to start somewhere!
> > >>>
> > >>> Wonk
> > >>>
> > >> No cnc needed for simple patterns. If you can cut wood to dimension,
> you
> > >> can do the same with foam. you can glue it together just like wood.
> > >> Some patterns may need bracing to keep them straight, but that isn't
a
> > >> huge problem.
> > >>
> > >> Another thought is for people with the patterns. Maybe you might want
> to
> > >> sell casting kits. Works for steam engines.
> > >>
> > >> --
> > >>
> > >>
> > >> Ron Thompson
> > >> On the Beautiful Florida Space Coast, right beside the Kennedy Space
> Center, USA
> >
>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
------------------------------------
Yahoo! Groups Links
http://groups.yahoo.com/group/gingery_machines/app/peoplemap/view/map
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