Article View: rec.models.rc
Article #2098Re: Help with release agents needed
From: Evil Engineer doin' it the Cowbo...
Date: Tue, 26 Jan 1993 23:01
Date: Tue, 26 Jan 1993 23:01
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2796 bytes
>>>>> On 25 Jan 93 18:09:06 GMT, cwatters@acorn.co.uk (Colin Watters) said: Colin> Can anyone talk to me about release agents? Colin> I have made a polyester mould that came off its wooden plug very Colin> easily however I can't seem to stop epoxy mouldings sticking to Colin> the polyester mould very badly (I trashed one part of the mould Colin> at the first attempt!). Colin> I have tried: Colin> 1/. Bees Wax rubbed on and polished off - six "coats"! Colin> 2/. A silicon spray used to lubricate windsurfer dagger boards. Colin> (Yes I know about painting problems later with silicon). Colin> Both looked OK before lay up (nice shine) but in both cases the Colin> epoxy stuck to the polyester mould better than it did to the kevlar Colin> cloth! Colin> When applying wax should it be left to form a kind of solid cost Colin> or polished off like on car bodywork? I find most of it seems to Colin> comes off as a white powder when I polish it even gently. Should Colin> the mould have the shine taken off first before starting with the Colin> wax? Mine has a high gloss finish. Colin> Ta For parting wax, try carnuba paste wax. Three very thin coats are required on a new mold. Also use polyvinyl alcohol (PVA) release film, which can be sprayed or sponged on, to provide a smooth glassy film. PVA should be applied over the parting wax. It is water soluble for easy release. There are also spray release agents available. Check with Fibre Glast Corporation, phone number 1-800-821-3283, for a catalog with further information. L. "Yeh, Buddy.. | larry@psl.nmsu.edu (Larry Cunningham)| _~~_ I've got your COMPUTER! | % Physical Science Laboratory | (O)(-) Right HERE!!" | New Mexico State University | /..\ (computer THIS!) | Las Cruces, New Mexico, USA 88003 | <> -------------------------------------------------------------------------- Disclaimer: Opinions expressed here are CORRECT, mine, and not PSLs or NMSUs.. Tularosa: tullies, roses, lava, white sands, and home of THEM! (atomic ants).
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<LARRY.93Jan26160100@peak.psl.nmsu.edu>Path:
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Newsgroups: rec.models.rc Path: arc1-ca.pugleaf.net!sparky!uunet!charon.amdahl.com!pacbell.com!decwrl!concert!gatech!rpi!usc!zaphod.mps.ohio-state.edu!cs.utexas.edu!qt.cs.utexas.edu!yale.edu!yale!gumby!destroyer!ncar!mimbres.cs.unm.edu!lynx.unm.edu!nmsu.edu!opus!larry From: larry@peak.psl.nmsu.edu (Evil Engineer doin' it the Cowboy Way) Subject: Re: Help with release agents needed In-Reply-To: cwatters@acorn.co.uk's message of 25 Jan 93 18:09:06 GMT Message-ID: <LARRY.93Jan26160100@peak.psl.nmsu.edu> Sender: usenet@nmsu.edu Organization: New Mexico State University, MetaPhysical Science Laboratory References: <21177@acorn.co.uk> Date: Tue, 26 Jan 1993 23:01:00 GMT Lines: 45