Re: Very small details

From: aaroflex (
Date: Thu Mar 04 1999 - 21:38:49 EET

AAROFLEX, Inc. is the U.S. distributor for RPC resins as well as the DuPont resins.
The RPC resins have very good properties and good throughput.
A new resin which has been in testing for some times is now available in the US
market. It is RPC 300 AR with a 120 C (DMA Peak E").
The RPC 300 AR has high temperature resistance and good mechanical properties, and is
useful for high temperature testing and rapid tooling.
This material is also available for solid state and He/Cd with similar properties..
Please request pricing and the physical properties and I shall send the information
to you directly.

Britt Ferrill wrote:

> Wayne Foss was looking for a source for a small highly detailed part with 7 mil
> wall thickness and capable of working in a 125 degree C environment.
> This may be the place for an "old fashioned" injection mold. Probably shoot the
> part in LCP plastic because of the thin walls. Depending on the actual shape of
> the part, you may be able to wireEDM burn the 7 mil mold cavities which will mold
> the 7 mil part walls. Or you may need to build the mold up from laminates.
> Even for a few dozen parts I think that this method will be more successful than
> the various RP methods because of the thin walls, heat requirements and strength
> and toughness required in the final part. Talk to your mold toolmaker about how
> cheap and fast he can do a quick prototype mold. You may be surprised at his
> answer.
> If you only need a few parts then consider CNC machining the part from a solid
> block of plastic if the design lends itself to that approach..
> Britt Ferrill
> > Wayne L Foss wrote:
> >
> > > I have a potential need for a source that can produce small, highly
> > > detailed parts to the specifications that follow. The part will be used for
> > > isolating and mounting IC chips in a test fixture. Dimensions are in
> > > inches.
> > >
> > > The part will have .007 thick fins that are .100 high and .050 wide. They
> > > may be attached to a solid structure at one end (along the .100) and/or the
> > > bottom (along the .050). There is a space between fins of .010 which makes
> > > the pitch .017. This part will fit over (or under) the IC and the fins will
> > > fit in between the "waterfall" of the leads. There are 60 leads per side
> > > for a total of 240. The material must be strong, withstand a temperature of
> > > 125 degrees C and must be electrically non-conductive.
> > >
> >
> For more information about the rp-ml, see

For more information about the rp-ml, see

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