Custom/Hybrid Infusion ratio resin/fabric

[loictahiti]

I m just starting and trying my first part with infusion system.
For now, its very cool, take my time to cut and positioning all fabric layers, mesh, vaccum bag....
So I m not very sure about the real ratio between resin and the total of the fabric weight .

Could you help me , before the launch ;-))))

Thanks

 

[BruceSki]

@airblair


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[air blair]

Shoot for 50/50 infusion is 60/40 in the end but your flow media and tubes gobble up some. Example 2lb material=2lb resin


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[loictahiti]

Shoot for 50/50 infusion is 60/40 in the end but your flow media and tubes gobble up some. Example 2lb material=2lb resin


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Ok thanks a lot Airblair

 

[DAG]

I've never done any infusion but I'd sure as hell would have extra epoxy in the tank than have my pump send air bubbles through my bag

 

[loictahiti]

Yes , I prepare some more resin I need , to be sure that enought and after I use the rest of resin on small parts mold in hand layer ..... resin is expensive ahahahaha.

 

[mike b]

I had talked to someone a year or so ago about this. I was told start with resin to cloth ration very close to each other. later down the line after enough pieces made the goal will be to lessen the amount of resin so that there is a bit less resin than cloth because the cloth is where the strength is after the bonding has occurred and that the excess resin is added weakness and weight. Of course there is a line where you do not have enough resin but I would try some test pieces first. Maybe like a ride plate or a hood or something that you weigh and test strength of each till you find a ratio you like? Not sure what you are making but the material costs of test pieces of small objects like hood/ride plate are a hell of a lot cheaper than sample hulls if that's what you are trying to do

 

[loictahiti]

You r right , I m trying to infuse the hood before the hull

 

[Big Kahuna]

X2 Hood?

 

[loictahiti]

X2 Hood?

No LOL hull , my own hull like BOB from 300 sx

 

[loictahiti]

Ok today is a big day.....first infusion
I m so happy its works very fine , almost 2mn to infuse it , dont need 2 hours to make one .
Just need some valve upgrade.
So like airblair says , i put 50/50 ratio resin/fabric + 20% for security..... dosent need for next time, it took 45% resin/55 fabric .
Love this
So tomorow at noon , unplug part/mold and We ll see the result , I hope it will be good .

 

[loictahiti]

Ok , unpluged was very hard, I think my green mesh is too heavy, I suppose is for made 45 feet boat hull .....
But for the first time , its ok , not 100% , some bubble in angle (suppose my mesh doesn’t push freely ).
I m not use gel coat, too long and more easy to check the infusion result and where is bad and why.
So I use carbon just to see the result too.

I m very happy by the first one piece , need to make some more before opening my own hull compagny ahahahaahaha, need to find some better stuff, like, mesh more smooth, resin hose more smooth and easy to block by press clamp, (not use valve), etc....

And the hood seem’s to be durable ( you say that ? Or tought ) and light

 

[hydrostyler]

My process is to apply your bag tape to the mold and weight the mold. Then get all your fabric and consumables loaded in and bagged up. Weight the loaded mold and calculate the difference. That's how much weight in resin you'll need with excess included. The 40/60 will happen as long as you keep your feed bucket nearly level with your mold. raising it higher will allow more resin to flow in and richen the ratio. Watch out for that @air blair guy, he'll have you freeze curing your parts and adding glitter to dissipate the exotherm.

 

[hydrostyler]

Also cut your flow material to end a couple inches from the edge all the way around. This will create a brake zone and help slow the flow near the end of the infusion so the resin doesn't race right to your spiral before you clamp the feed line.

 

[loictahiti]

Its what I ve done, tape on mold and weight it after done again with fabric only .
The difference was 1,550 kilogram
Mix 2 kg resin
Left 0,400 kg in mix pot
Catch 0,350 kg in resin trap pot
loose some in spiral , mesh
So I use 1,250 kg

After unpluged the part and weight it, my external hood (untrimmed) 2,2kg

 

[loictahiti]

Also cut your flow material to end a couple inches from the edge all the way around. This will create a brake zone and help slow the flow near the end of the infusion so the resin doesn't race right to your spiral before you clamp the feed line.

Ok thanks I ll do that for the next time , I supposed I have to put all material on same place, fabric +peel ply+ mesh at the same size ...

 

[hydrostyler]

Ok thanks I ll do that for the next time , I supposed I have to put all material on same place, fabric +peel ply+ mesh at the same size ...

The mesh can be smaller, but the fabric and peel ply should be the same size.

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[loictahiti]

The mesh can be smaller, but the fabric and peel ply should be the same size.

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Ok for the fabric and peel ply
But for the mesh did I do it bigger for the brake zone ?

 

[air blair]

@hydrostyler is very knowledgeable and makes probably the lightest hull ever ridden. Very good at pulling his numbers. Good dude, knows what he’s talking about on occasion.


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[hydrostyler]

Ok for the fabric and peel ply
But for the mesh did I do it bigger for the brake zone ?

Something like this. Notice the flow material is slightly smaller than the rest of the lay-up.

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