albright is definitely an interesting option. he actually builds a hybrid
silicon/aluminum tool by hogging the rough core and cavity out of an
aluminum billet, then casting a silicon "glove mold" around the master
pattern much like you would for urethane parts. because the wall thickness
of the silicon is supposed to be constant at around 1/4", the silicon tools
not only demold easier, but should last longer. also cheaper and quicker to
replace when the heat of injection finally kills 'em. the aluminum around
the silicon is what handles the injection pressure. this of course, is the
i've had him quote some stuff, but never actually seen any parts. let me
know how it goes if you do it.
will pattison, idsa
product development engineer
> From: Douglas A. VanPutte[SMTP:firstname.lastname@example.org]
> Sent: Thursday, February 24, 2000 4:42 PM
> To: email@example.com; rpml
> Subject: Re: Silicone rubber tooling for inj. molding
> Contact Dave Comeau at Albright Plastics (firstname.lastname@example.org,
> Douglas A. VanPutte
> Consultant & Manufacturers' Agent
> Cross-Bow Rapid Tool Associates, Inc.
> 18 Cross Bow Drive
> Rochester, NY 14624-4710
> Tel: 716-889-3601
> Fax: 716-889-7335
> Cell: 716-329-1308
> Email: email@example.com
> Web: http://www.frontiernet.net/~vanputtd
> >From: Glyn Churchman <firstname.lastname@example.org>
> >To: rpml <email@example.com>
> >Subject: Silicone rubber tooling for inj. molding
> >Date: Thu, Feb 24, 2000, 7:02 PM
> > I thought I once saw a posting from a company that claimed to do
> > molded parts in silicone rubber tooling.
> > I have an application where I need to make thousands of many different
> > parts with soft undercuts and I want to avoid witness or parting lines.
> > material for these is a low temperature polyolefin type of material.
> > A previous manufacturer of these parts used a spin-casting machine and
> > much as one would cast low-temp alloy metal parts, in silicone molds (so
> I was
> > told). I think this would be too slow and costly for the quantities I
> > Any takers or do you know the company I am thinking of?
> > Glyn@Prototech, Inc.
> > For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
> For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
For more information about the rp-ml, see http://ltk.hut.fi/rp-ml/
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