From: Jeff Montigny (sales.xlfab@gmail.com)
Date: Wed May 30 2007 - 18:36:03 EEST
Zcorp has a new powder type which uses WATER as the infiltrant. Have
your read about that yet? It's for white parts only.
Jeff Montigny
Accelerated Fabrication, Inc
Austin, TX
On 5/29/07, Brett Lyons <lyonsb@umich.edu> wrote:
>
> Hi,
>
> If cost is a very important issue, you can get results comparable to an
> epoxy infiltrated tool with a low-exotherm MEKP catalyzed polyester or
> vynil ester infiltration. Keep your catalyst to resin ratio <=1:50, and
> the shell coating very thin because kick-off can distort a part if the
> reaction temp gets near 90C. That would be about ~1/2 the cost of
> epoxy, and still give you the stiffness required for properly ramming
> up a mold and allow you to give a good finish to the tool. As for ease
> of use... isn't running the melt, mounting the tool and molding
> exponentially more of a hassle than pattern infiltration?
>
>
> Cheers
> -Brett
>
>
>
>
> Brett Lyons
> Senior Research Technician, UM3D Lab
> Graduate Student, Mechanical Engineering
> FSAE, SAE, SME, AFS
> 734-647-5497
>
>
>
> Quoting "Petar O." <intrio@gmail.com>:
>
> > Dear colleagues,
> >
> > I've been using powder models infiltrated with wax (yes, just plane and
> > normal wax) for sand casting. My results are good but, as you can imagine,
> > my parts don't last long.
> >
> > I know wax isn't the toughest infiltration material but I have my reasons to
> > do so:
> > 1. cheap
> > 2. fast - you can deep the part
> > 3. reusable - just reheat it and it's ready to go.
> >
> > I don't want to use epoxy because you have to use certain amount so you
> > won't waste material unnecessary. CA is too expensive.
> > I've heard that some wood preservative would work fine with the powder but I
> > haven't tried it.
> >
> > Do you know some material that would have the same characteristics that the
> > ones stated above?
> >
> > Thanks and...keep building layers!
> > P.-
> >
>
>
>
>
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