fiberglas backing?
Walt
would like to know if I should use a fiberglass resin or glue.
Anyone have any idea.
Thanks
Walt
david bell
first, obtain the correct weave of cloth, various coarsness of woven cloth
is available
second, resin is glue - just a different name, get the approved resin and
accelerator for the job.
Is it polyester resin or epoxy you need?
then soak the cloth in the resin / activator mix, ensuring full penetration
of the resin in the cloth.
Apply cloth and stipple on to the bow with a brush
If you are confused get a good book on limb manufacture using GRP
composites.
"Walt" <waltmc...@sympatico.ca> wrote in message
news:36b4fv436ucsod5ua...@4ax.com...
William Orr
You should use 2-part epoxy available at Home Depot.
Bill Orr
William Orr
Use 2-part epoxy available at Home Depot.
Bill
William Orr
Use 2-part epoxy available at Home Depot or marine supply shops
Bill
pragmatist
"2nd. Attempt" - Sounds like a sad story. Here are some hints:
Two Part epoxy is the best way to go, read the instructions carefully
as to 'pot life`. Your working time with any one batch is strictly
limited.
If you get the white kind you can add pigment to color the resin and
mix it in well before you add the hardener. Do a small test patch or
three on scrap wood for appearance, practice, and to get the mix
right.
Get your surface CLEAN, (even oil from your skin can weaken the bond),
flat, and very slightly rough.
Pin your cloth in place with a little overlap and dry,(the pins come
out later).
Paint the mixed epoxy on and work it in well with a small brush, (no
air pockets please), pull the pins out, lay another light coat of
epoxy over the surface. Then cover the surface with a strip of waxed
paper, (one piece). Roll out any bubbles with a small roller. As the
epoxy stiffens up lay the job paper down to cure.
After the cure you will be left with a smooth finish, the waxed paper
should come off fairly easily. Clean up the overlap and epoxy at the
edges with a sanding block and you're ready for tuning and varnish.
Good luck.
Bill Orr
"pragmatist" <ilsd...@netscape.net> wrote in message
news:5a53ae0a.03070...@posting.google.com...
> "William Orr" <wobi...@earthlink.net> wrote in message
news:<pIFOa.90142$Io.78...@newsread2.prod.itd.earthlink.net>...
> > "Walt" <waltmc...@sympatico.ca> wrote in message
> > news:36b4fv436ucsod5ua...@4ax.com...
> > > I would like to apply fiberglass backing to a bow I just made and
> > > would like to know if I should use a fiberglass resin or glue.
> > > Anyone have any idea.
> > > Thanks
> > > Walt
> >
> > Use 2-part epoxy available at Home Depot or marine supply shops
> >
> > Bill
>
> "2nd. Attempt" - Sounds like a sad story. Here are some hints:
-------------------------------------------
Yes, "2nd Attempt" does sounds like a sad story, ha. I was refering to my
computer rather than the procedure (sorry about that ). I agree with your
suggestions. It works for me except that I never use fiberglass. I use nylon
webbing , carbon fiber or kevlar. It's much stronger and works better.
Bill
scp
Nylon webbing. Interesting idea. I wonder what would be the maximum
tensile strength of it. An ad says "Nylon webbing is available in 1 in.
to 1 3/4 in. width with 0.030 in. to 0.096 in. thickness & 1,200 lbs. to
7,000 lbs. tensile strength." Not even as strong as most wood? Is this
strong enough?
Cf. http://en.wikipedia.org/wiki/Ultimate_tensile_strength
http://www.engineeringtoolbox.com/young-modulus-d_417.html
scp
If it's not going to increase the tensile strength of the back, and
possibly make the bow needlessly heavier, we can just use much lighter
and "natural" fabrics like silk or linen.