As an additional note regarding Keltool... Keltool is a CAST-TRANSFER
process. Inherent with any cast-transfer process is the chance of
inaccuracy as a result of casting off a master. Unforeseen shrink
could occur from the casting steps. Plastic molding shrink is very
predictable, not so with silicone rubber, epoxy, urethanes, etc. Add
these posibilities to an inaccurate master model and..... Good Luck!
Best Regards,
Jim Williams
______________________________ Reply Separator _________________________________
Subject: Re: Another misnomer.
Author: jim@paramountind.com at INTERNET
Date: 11/9/96 09:07 PM
Will... thanks for that clarification.. The originator to the Keltool
process was 3M... They called it Tartan... 3M's process is what the
previous owners to 3D purchased..
My company made patterns for injection molds when Kenner Toys first
introduced Star Wars... That's 18 years ago +/-... Our patterns were
made by hand carving and machining.
As an RPer using SLS the quality of product made by the traditional
model maker skills is superior to RP... But time is precious, so goes
the craft!
Jim Williams, CEO
Paramount Industries, Inc.
1.888.RPTOOLS
______________________________ Reply Separator _________________________________
Subject: Another misnomer.
Author: pattisow@dtm-corp.com at INTERNET
Date: 11/6/96 5:04 PM
To The List-
I couldn't help but notice in the response to the Keltool question
that it was stated that a stereolithography master is used to generate
the silicon mold for the powdered metal. While stereolithography has
understandably become to rapid prototyping what Xerox has become to
copies, it is nevertheless frustrating when something like this
occurs. As I am sure the folks from Helisys, Stratysis, Sanders, and
others, will agree, it is important to note that ANYTHING can be used
as the master in the Keltool process. If it were accurate enough, a
wood carving would suffice. This is in no way meant to disparage the
Keltool process, but merely to point out that it is not inherently
attached to any specific RP technology.
Sincerely,
Will Pattison
Applications Manager,
DTM Corporation
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