Re: Improved Accuracy Tools

From: Rolf Hubert (
Date: Thu Apr 22 1999 - 20:24:06 EEST

I'm confused, but this will probably not be the last time. We are talking
about making tools with powder metal technology, are we not? At this point,
powder metal is not the solution for all tooling. However, small parts can be
accurately produced with the appropriate shrink included on the Sanders

The NDM process is being used by many companies with extremely good results.
I think that perhaps you should send a small part (core and cavity) to John
Mastoloni . He'll obviously charge you for the model
and then have NDM make the metal parts.

The key is that the MM-II can make dimensionally accurate smooth models that
will require no edm work. Try the process, you'll probably like what you see.

Rolf Hubert
Sanders Prototype, Inc.
603-429-9700 wrote:

> Dear List
> I find that the idea to make tools in this way could be usefull.
> I think though that the most expensive step for the moment will be the CAD
> process.
> The making of the second and exactly compensated 3-D model may be
> timeconsuming and expencive.
> My question therefore is
> Are there any "automatic" and easy ways to compensate and make a new STL
> file when you have got your first 3-D file and the first cast tool, which
> will because of metal shrinkage be smaller than your first 3D model?
> What programs and services are available to make this second 3D model
> easily? The model has to be exactly as much oversized as the shrinkage of
> the first tool?
> Electrolux Rapid Development
> Stefan Ronnlund
> For more information about the rp-ml, see

For more information about the rp-ml, see

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