From: Steven Adler \( A3DM \) (adler@a3dm.com)
Date: Mon Oct 27 2003 - 22:45:08 EET
My question is, are they using the Perfactory parts as the investment
(making a ceramic mold around it and then burning off the RP part?)
>>>>>>>>>>> Envisiontec material can be cast directly as a pattern
using a loss wax process. The burn-out cycle is higher and a longer
duration than wax. In cases where a caster does not want to dedicate a
burnout cycle for this material, clients have been using a RTV ( Room
Temperature Vulcanize )material, usually silicone based, to mold the
pattern. Once the mold is cured, the original pattern is removed and wax
is injected into the mold. The resulting wax patterns can then be cast
under normal burn out procedures.
>>>>>>>>>> In production, a metal master is created and a
vulcanized rubber mold is made. These molds have a longer life and are
more suitable for production.
>>>>>>>>>> There are however some newer rubber materials that can
be vulcanized at a lower temperature allowing the use of a Perfactory
model directly. The process is a hybrid and thus far an art in insuring
that the pattern is not warped by too much pressure being applied in the
vulcanizing process.
>>>>>>>>>> Feel free to telephone if I can be or further help with
Envisiontec parts. Hope this helps
Steven Adler
Automated 3D Modeling, Inc
www.a3dm.com
603.433.4369
>>>>>-----Original Message-----
>>>>>From: owner-rp-ml@rapid.lpt.fi
>>>>>[mailto:owner-rp-ml@rapid.lpt.fi] On Behalf Of Scott Tilton
>>>>>Sent: Monday, October 27, 2003 8:43 AM
>>>>>To: rp-ml@rapid.lpt.fi
>>>>>Subject: RP and Jewelry Question
>>>>>
>>>>>
>>>>>Hi fellow RP'rs.
>>>>>
>>>>>I've got a question about the process that is used to turn
>>>>>an RP part into a
>>>>>piece of metal jewelry.
>>>>>
>>>>>While at the RPA show in Chicago, I saw the EnvisionTec
>>>>>Perfactory display
>>>>>where they had made lots of little orange RP rings and
>>>>>then they also had
>>>>>some investment cast copies too.
>>>>>
>>>>>My question is, are they using the Perfactory parts as
>>>>>the investment
>>>>>(making a ceramic mold around it and then burning off the RP part?)
>>>>>
>>>>>Or are they making wax copies of the Perfactory parts to
>>>>>burn off? (using
>>>>>some sort of soft -- rubberish tooling)
>>>>>
>>>>>I had an older person from the jewelry industry tell me
>>>>>about when they made
>>>>>molds around patterns for creating wax duplicates.
>>>>>
>>>>>He said that the pattern would be fixtued in a holder, and
>>>>>then rubber
>>>>>pellets were packed in all around it.
>>>>>They they'd put it in the oven at 250F or so and let the
>>>>>rubber melt around
>>>>>the pattern.
>>>>>
>>>>>This was all news to me . . . I explained to him that the
>>>>>majority of RP
>>>>>parts out there that I knew of weren't't going to hold up
>>>>>to 250F very well,
>>>>>and that I thought all the soft rubber tooling guys had
>>>>>gone to Room
>>>>>Temperature Vulcanizing types of molds.
>>>>>
>>>>>Anyone willing to educate me about the process .. . I'd
>>>>>be interested and
>>>>>grateful.
>>>>>
>>>>>
>>>>>Thanks in advance.
>>>>>
>>>>>
>>>>>Scott Tilton
>>>>>
>>>>>
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