Re: [PSUBS-MAILIST] Acrylic laminating

["Brian Cox" <ojaibees@ojai.net>]

Mark,
I have been thinking about this viewport / hatch business and how I am planning to approach the whole thing.   What I may try to do is to build my viewport/hatch on a cylinder of approximatly 20" in diameter by 12" in length and then seal both ends, one end would be a simple hatch and the other would be my eventual viewport.  Then I could take the whole thing out on the boat and drop it down to a desired depth.  I could then test different hatch designs and see what works!  If anybody wanted to test thier hatch I could test it for them as long as the seals matched up or an adapter was made to fit.

Brian Cox

----- Original Message ----- 
From: "Mark Steed" <plutomark@mail.astate.edu>
To: <personal_submersibles@psubs.org>
Sent: Friday, January 16, 2004 12:34 PM
Subject: Re: [PSUBS-MAILIST] Acrylic laminating


> Emile and all: I work with large amounts of plexiglass/acrylic in my job. I have access to tons of it and work with it constantly. The biggest part of my work with it involves museum exhibit fabrication. Covers, doors, cases and mounting applications are the main uses here. I do a lot of cutting, bonding, heat forming, bending and about everything that can be done to the stuff. I have professional cutting, heating and bending equipment in the shop but no vacuum forming or any pressure related equipment. I deal primarily with 4 X 8 ft. sheets of varying thickness. The thickest acrylic I have here is a small amount from a sheet of 5/8 inch stuff. Most of my acrylic applications have no great stresses placed on them such as submarine considerations. If anyone is interested and can come up with some legitimate testing ideas, I offer to help. I can, on a small scale and in my off-work hours, do some testing on acrylic materials. I have no idea where to begin if there is any interes!
> t but  maybe we can all learn something. Any suggestions or ideas in the destruction of plexiglass/acrylics? Just a thought- Mark
> 
> Mark E. Steed
> Arkansas State University Museum
> 110 Cooley Drive,PO Box#490
> State University, AR 72467-0490 
> USA
> Tel#(870)972-2074 Fax#(870)972-2793
> Email: plutomark@mail.astate.edu
> 
> 
> 
> ---------- Original Message ----------------------------------
> From: "Emile" <2stroke@hetnet.nl>
> Reply-To: personal_submersibles@psubs.org
> Date:  Fri, 16 Jan 2004 17:38:24 +0100
> 
> >Dan, Brian
> >
> >The vacuum form production method sounds good to me but the white papers on the site tell its not suitable for 1 atm subs. little wall thiknes or bad out of roundness??
> >For to the slice production method; when heat threadment is done after cutting the donuts stress is gone.If properly machined after bonding (sharp tool,coolant) the residual stress must be very small for a material with such a low youngs modulus.
> >I still think the advantages of producing relative easy a thick walled spherical viewport are great. Disadvantage: as there are no models we have to do some (scaled down) destruction tests. 
> >
> >Regards , Emile
> >  ----- Original Message ----- 
> >  From: Dan H. 
> >  To: personal_submersibles@psubs.org 
> >  Sent: Friday, January 16, 2004 3:01 PM
> >  Subject: Re: [PSUBS-MAILIST] Acrylic laminating
> >
> >
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