[PSUBS-MAILIST] fiberglass

Tue Sep 20 22:13:25 EDT 2016

Hi Scott, while I'm not an expert on the gel coat / fiberglass materials, I
will give you my advice on the mold process. On the SeaQuestor project the
exoskeleton was modeled in Rino. From there the mold patteren is being sent
to a 5 axis cnc machine. The mold will be cut out of the cheapest
styrofoam. We will then be spray gluing tin foil from your local store to
the surface. Once the entire surface is covered in foil, a wax coat is
applied like normal. The majority of any fine wrinkles from the gluing
process will disappear with the wax. Then the parts are ready to be laid up
by the fiberglasser. The foam mold will be able to pull at least two parts
or more depending on the amount of foam remaining after the cnc process.

Here is the best part of the process. For the SeaQuestor, two molds will be
made, cnc time 2 days, prep time 1 day, fiberglass layup and demold, 1 day.
Final surface finsh, varies based upon quality of foil job, 1-2 days, ready
for paint if desired.  Then repeat for next part.

My cost for 2 molds, approximately 18 ft x 7 ft x 4 ft each from foam
blocks, cnc work at around 5k ready to glass, glass work around $11.00 per
sq.ft. surface area.
My opinion is the 3d molds from the Rhino type program with cnc is the most
time efficient, and I can easily make additional matting parts from the
model.

Just my two cents worth.

David Colombo
On Sep 20, 2016 3:19 PM, "via Personal_Submersibles" <
personal_submersibles at psubs.org> wrote:

> Thank you everyone for your help. I think I got a great plan for the
> fiberglass for Pisces VI now.
>
> Thank you,
> Scott Waters
>
> >  -------Original Message-------
> >  From: MerlinSub at t-online.de via Personal_Submersibles <
> personal_submersibles at psubs.org>
> >  To: Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> >  Subject: Re: [PSUBS-MAILIST] fiberglass
> >  Sent: Sep 19 '16 13:20
> >
> >
> >
> >  Hi Scott
> >
> >  01) make a positiv from plywood, foam, concret whatever. Make the
> surface smooth and stable and with overlength of 2-5 inches
> >  02) make a negativ copy from Polyester and Glasfiber
> >  03) Make your positiv orginal copies - cut the overlength.
> >  Thats a short description of a long way.
> >
> >  0A) make a positiv from plywood. Make the surface smooth and stable
> >  0B) Bring this positiv to a small boatsbulder and let him make the 02)
> and 03)
> >  Because that the most labour hours are in 01) - 0A) the rest in
> sometimes cheap.
> >
> >  If the Pisces is normaly storage is outside the water - Polyester resin
> with a Gelcoat outside and a epoxypaint inside is a good and unexpensive
> and easy to handle way. If it is long time exposende in the water maybe
> Epoxy resin is the better solution but more tricky to handle and more
> expensive.
> >
> >  vbr Carsten -  I can send you more pictures because here the pictures
> are very limited in size and amount.
> >
> >
> >
> >
> >  -----Original-Nachricht-----
> >  Betreff: [PSUBS-MAILIST] fiberglass
> >  Datum: 2016-09-19T17:27:27+0200
> >  Von: "via Personal_Submersibles" <personal_submersibles at psubs.org>
> >  An: "PSUBS" <personal_submersibles at psubs.org>
> >
> >  Hey everyone,
> >
> >  For someone such as myself that doesn't know much about fiberglass. Can
> I get some help for what I need to do to build the fairings for Pisces VI?
> >
> >  *What fabric and resin do I use
> >
> >  *I know of the foam plug method, but how do I get the outside to be
> pretty and smooth. do I have to use a negative mold for that?
> >
> >  *How do I correlate how much fabric I need to equal a specific
> thickness?
> >
> >  Any help and links to websites/videos are appreciated.
> >
> >  Thank you,
> >  Scott Waters
> >  _______________________________________________
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> >  Personal_Submersibles at psubs.org
> >  http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
> >  _______________________________________________
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> >  Personal_Submersibles at psubs.org
> >  http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
> >
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