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screen printing => Equipment => Topic started by: jason-23 on July 13, 2012, 02:49:51 PM

Title: Anybody have any experience with fiberglass??
Post by: jason-23 on July 13, 2012, 02:49:51 PM
Really fiberglass resin and speaker box building, not for speaker boxes but for something that im building for screen printing.
Title: Re: Anybody have any experience with fiberglass??
Post by: mk162 on July 13, 2012, 02:52:32 PM
a little bit, what are you looking to do?  the work i did was mainly repairing a boat hull, jetski, and my fiberglass hardtop.
Title: Re: Anybody have any experience with fiberglass??
Post by: jason-23 on July 13, 2012, 03:11:20 PM
I was just wondering how hard is just dried resin on fabric like what they use to make the body of a speaker box? they use fleece for the fabric because of the stretching quality staple it down to get the shape and then they lay down resin just to harden the fleece and then fiberglass and resin to make it stronger. I was wanting to know if the fleece and resin is strong for like a wall type thing, no load bearing or force applied to it.
Title: Re: Anybody have any experience with fiberglass??
Post by: mk162 on July 13, 2012, 03:25:34 PM
yeah, you can also lay 2 layers down to make it stronger...and I would rotate 1 of them 45 degrees if possible.
Title: Re: Anybody have any experience with fiberglass??
Post by: Binkspot on July 13, 2012, 03:28:30 PM
The fiberglass and resin can be stronger then steel. Its all in how the glass is laid and shaped. It also depends on which type of glass, angle hair or mat roving and the size of the strands in the roving also std glass and graphite.  There are also several types of resins for diffrent jobs rainging from laminating, polyester, epoxy, finishing etc. There are also premade shapes and panels that can be bolted of glassed together.
Title: Re: Anybody have any experience with fiberglass??
Post by: Frog on July 13, 2012, 03:34:22 PM
Not that it will help Jason, but there are also these cool chopper guns which feed (and chop) fiberglass rope, mixing it with resin as it is sprayed onto a mold.
Title: Re: Anybody have any experience with fiberglass??
Post by: jason-23 on July 13, 2012, 03:54:22 PM
So how do you go about making basically a large box? wood frame box, cover with fleece, resin it, dry, and then apply FG and resin? Will the wood frame separate from the FG after it is dried or do i have to treat the wood frame with something prior, in the first step?
Title: Re: Anybody have any experience with fiberglass??
Post by: Frog on July 13, 2012, 04:30:53 PM
I'm sure that there are mold release type things out there, something like wax. You want a nice smooth surface, and rounded corners will help the release as well as will a shape that gets a little bigger as the formed glass and resin is pulled off.

I am still a little stuck at the fleece part.
Title: Re: Anybody have any experience with fiberglass??
Post by: mk162 on July 13, 2012, 04:31:20 PM
yeah, there should be mold release, you can use a sheet of mylar if you have it, i am sure there is a chemical as well.
Title: Re: Anybody have any experience with fiberglass??
Post by: Binkspot on July 13, 2012, 04:33:02 PM
Are you going to pop it out of the wood frame to make a shell or keep the wood for strength. I you are going to pop it out line the wood with wax paper and plain wax, no tight corners. The fiberglass will be stronger with rounded corners instead of square anyway. If the wood is staying the resin will soak into the wood and laminate it to the glass. Cardboard is a great alt to wood to shape the glass and make molds for frames and stiffners.
Title: Re: Anybody have any experience with fiberglass??
Post by: jason-23 on July 13, 2012, 04:38:08 PM
I'm sure that there are mold release type things out there, something like wax. You want a nice smooth surface, and rounded corners will help the release as well as will a shape that gets a little bigger as the formed glass and resin is pulled off.

I am still a little stuck at the fleece part.
at about 3:30 is the fleece part.
http://youtu.be/G8cz_5eP81U (http://youtu.be/G8cz_5eP81U)
Title: Re: Anybody have any experience with fiberglass??
Post by: mooseman on July 14, 2012, 08:02:51 AM
let me suggest that you want to be VERY careful with the fiberglass HARDENER. It is MEKB which doesn't mean much until you slash it into your eye. It will INSTANTLY opaque your optical tissue.
Put a large enouh hole in the tube so you do not have to squeeze the tube to get the catalist out. Wear eye protection and never point the tube toward your face when you initally puncture the tube .
mooseman
Title: Re: Anybody have any experience with fiberglass??
Post by: jason-23 on July 14, 2012, 01:11:37 PM
let me suggest that you want to be VERY careful with the fiberglass HARDENER. It is MEKB which doesn't mean much until you slash it into your eye. It will INSTANTLY opaque your optical tissue.
Put a large enouh hole in the tube so you do not have to squeeze the tube to get the catalist out. Wear eye protection and never point the tube toward your face when you initally puncture the tube .
mooseman
Thanks moose, I'll keep that in mind. I'm still weighing my options on different materials to build this project.
Title: Re: Anybody have any experience with fiberglass??
Post by: Printficient on July 14, 2012, 01:35:56 PM
Call Winston Strickland.  904-343-0848
Title: Re: Anybody have any experience with fiberglass??
Post by: jason-23 on July 14, 2012, 02:13:20 PM
Call Winston Strickland.  904-343-0848
Who is that and for what exactly?
Title: Re: Anybody have any experience with fiberglass??
Post by: Homer on July 14, 2012, 04:04:08 PM
alright, I'll ask  -what in the hell are you making?
Title: Re: Anybody have any experience with fiberglass??
Post by: Frog on July 14, 2012, 05:06:10 PM
Call Winston Strickland.  904-343-0848
Who is that and for what exactly?

Winston is our dryer guru here, but before he was banished to the nether regions of Florida, he was part of the surf culture out here on the real coast! (That's why he is still California Dreaming!)  ;D

They are a lot lighter and weaker today, but good boards are still made the same way of hand laying fiberglass over hand shaped foam blanks the same way as since the '60's.
Foam blank makers are just harder to find.
Title: Re: Anybody have any experience with fiberglass??
Post by: californiadreamin on July 14, 2012, 07:05:59 PM
Frog,like you I've learned to do what I'm toad!
Yep, 20,000 plus surfboards, a boat here or there,submarine antena, and
unfourtunatly, maybe even a drone or two flying above.But it was surfing,
that lead me into T-shirts. I was talking with my Unoffical publistist (Sonny)
about some molds I was building for screen tanks,washout booths, etc. and
was asking his (humble) opinions.No shortage there,the guy is ALWAYS thinking.
I really know more about presses, but at my stage in life, a "guru" in anything legal,honest
will do just fine. I make some custom ovens for the composite side of fiberglass,
once in a while, and I am into that part of fiberglass,where you mold under vacume,
and heat using mostly epoxies,polyesters,vinyl esters,etc and using e-glass,s-glass,biaxials,
kevlar,carbon fiber. It blows my mind to this day how light and strong composites have
become.Maybe some one will build screen presses,using this technology some day.Frog,
 how do you upload pictures here! I am putter eliterate!
winston


Title: Re: Anybody have any experience with fiberglass??
Post by: Frog on July 14, 2012, 08:35:14 PM

how do you upload pictures here? I am puter eliterate!
winston


You start out by clicking the blue Plus sign just below. PICTURE 1


Then you follow the instructions and choose a file of one of the acceptable types that resides on your computer PICTURE2



The other way to post pics here, is to just add the internet address between the brackets that appear when you click the Image icon PICTURE 3