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Thread: Unconventional molds
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03-25-2019, 11:17 AM #17000 RPM
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Unconventional molds
So I've used lots of things as molds. Example. Im rigging my boat with a electric fuel pump. Wanted a small box to cover it and just keep it safe. Found something perfect, so I used it as a mold.
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TwzteD liked this post
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03-25-2019, 11:20 AM #27000 RPM
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Pump will be mounted to a vertical wall with the box over it. With cutouts for hoses.
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davemvegas, TwzteD liked this post
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03-25-2019, 12:10 PM #3
That’s bad asss!
I do the same thing.
Half the trick to working w/glass is getting the MEK to resin ratio right.
I build small, custom glass pts all the time.
Keep it up.Last edited by Instigator; 03-25-2019 at 01:23 PM.
I'd rather be competitive w/junk I built in my garage than win w/stuff I bought.
I refuse to allow common sense to interfere w/my boat buying decisions.
Checkmate 16' 140 Johnson
Hydrostream 17' Vector FrankenRude I
Laser 480 (?) 21' w/GT 200
Glastron Carlson Conquest w/XP 2.6
Glastron Carlson CVX 20 w/XP 2.6
24' Sonic w/twin 250 Johnsons
24' Sonic w/twin 250 HO Johnsons
19' STV River Rocket w/FrankenRude II
Allison XR 2002 w/Frankenrude II
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03-25-2019, 12:19 PM #47000 RPM
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Oh, im sure you have.
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03-25-2019, 12:20 PM #57000 RPM
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What about the mek ratio?
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03-25-2019, 01:30 PM #6
Up here in Ohio where temperature chgs constantly, that chgs how much catalyst you add.
I’ll use up to 3% if I’m working in bellow 70* weather but normally between 1% - 2%.
If you get it wrong, it either sets up before you’re ready or not at all.
Ive done both.Ruined a bunch of pts, resin and cloth.
Down there, you’ll be at 2% in spring/fall or for small pts and 1% - 1 1/2% in August.
Get you a graduated dispensing bottle if you don’t have one.
Makes it idiot proof.
BTW, I still get all my glass supplies from Fiberglass Supply Depot on US1 in Ft. Pierce.
Great people, product and cheap.I'd rather be competitive w/junk I built in my garage than win w/stuff I bought.
I refuse to allow common sense to interfere w/my boat buying decisions.
Checkmate 16' 140 Johnson
Hydrostream 17' Vector FrankenRude I
Laser 480 (?) 21' w/GT 200
Glastron Carlson Conquest w/XP 2.6
Glastron Carlson CVX 20 w/XP 2.6
24' Sonic w/twin 250 Johnsons
24' Sonic w/twin 250 HO Johnsons
19' STV River Rocket w/FrankenRude II
Allison XR 2002 w/Frankenrude II
Hydrostream 18' V-King w/Frankenrude II
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TwzteD liked this post
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03-25-2019, 01:35 PM #7Screaming And Flying!
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I've just used the tupperware containers as is. The waterproof snap on/off lids are great. Battery switches and elec buss gangs etc. Mount the stuff thru the bottom of the box into a bulkhead and it's dry.
83 V-King, 96 Mariner, 200 hp ff block 2.5 w/a 28p choppa
We gotta clean this liberal mess up, VOTE TRUMP TO MAGA!
Rebuild thread:
http://www.screamandfly.com/showthre...-it&highlight=
http://www.screamandfly.com/showthre...cs.&highlight=
Videos
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03-25-2019, 03:09 PM #87000 RPM
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It was a lunchmeat container. But I've seen Tupperware used. And thinking about it, I could have easily used one. As far as ratio of hardner, 1% is standard when making bigger parts. 3% is usually max. For small stuff I don't even measure closely. I only needed 15 min with that part so I kicked it off hot.
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03-25-2019, 03:09 PM #97000 RPM
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I've put buckets of resin in the fridge before to extend gel time too.
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Instigator liked this post
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03-26-2019, 05:14 AM #105000 RPM
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I thought mixing to “hot” caused the part to be too brittle. A slow kick time can be speeded up by using heat lamps.
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Instigator liked this post
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03-26-2019, 06:49 AM #11I'd rather be competitive w/junk I built in my garage than win w/stuff I bought.
I refuse to allow common sense to interfere w/my boat buying decisions.
Checkmate 16' 140 Johnson
Hydrostream 17' Vector FrankenRude I
Laser 480 (?) 21' w/GT 200
Glastron Carlson Conquest w/XP 2.6
Glastron Carlson CVX 20 w/XP 2.6
24' Sonic w/twin 250 Johnsons
24' Sonic w/twin 250 HO Johnsons
19' STV River Rocket w/FrankenRude II
Allison XR 2002 w/Frankenrude II
Hydrostream 18' V-King w/Frankenrude II
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03-26-2019, 10:06 AM #12
hey fellas, I know you know what you mean when you refer to catalyst as MEK, but that makes it rather confusing for any novices reading your posts, when MEK and MEKP are both commonly used in the composites industry and are readily available at most suppliers. If someone were to mix MEK into there polyester or vinylester resin they are going to have a bit of a mess to clean up
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Instigator liked this post
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03-26-2019, 10:30 AM #13
I know MEK as methyl ethyl ketone. We use it for some PVC/ABS work here and there
Hydrostream dreamin
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03-26-2019, 10:43 AM #147000 RPM
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That's right. Mek is thinner/cleaner. Mekp is hardner. And by hot I just mean more than 1% not crazy hot.
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03-26-2019, 11:49 AM #15Screaming And Flying!
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Rule of thumb.....2% is max for resin and 3% for gell. This can be increased by 1% in cold weather but the catalyst has to be used up in the hardening process or it remains in the laminate and can be a problem later. So, use it correctly. Blisters/yellowing of the gellcote is one problem, weakened blistered laminate is another.
83 V-King, 96 Mariner, 200 hp ff block 2.5 w/a 28p choppa
We gotta clean this liberal mess up, VOTE TRUMP TO MAGA!
Rebuild thread:
http://www.screamandfly.com/showthre...-it&highlight=
http://www.screamandfly.com/showthre...cs.&highlight=
Videos
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