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Edward
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In 123.jpg file. 1. Gauge the correct amount of resin The amount of resin that your project will need will vary upon its size and the amount of reinforcement you have used; more layers of reinforcement will be able to support more resin. Use the table below to calculate approximately how much resin your finished part will use (see the PART column), and how much you should mix (see the MIX column) to ensure you have enough project will require: see the 234.jpg so we can calculate the resin weight content is 80/(200+80)=28.5%, This is very very low. Is it right? OR we often beliven the resin weight is 40%?
beijing of China
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Hanaldo
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I'm not sure how you've worked out your ratio there, but I don't know your stack. Basically no, 28.5% resin isn't correct, that's extremely lean. a 40% resin content is the usual aim for infusion, as you said. To calculate that, you work out the rough surface area of your part in square meters, take your total fabric weight and divide it by 1.5. Then calculate for any flow mesh, which uses 700 grams of resin per square meter regardless of laminate thickness. Add a waste factor for resin feed lines, spiral hoses, etc. I normally add about 100-200 grams depending on the size of the part and the length of resin feed hose being used. So for example, if your part was 1.65sqm in area and you had 2 layers of 200gsm carbon and 1 layer of 660gsm carbon; your calculation would be as follows: 1.65 x 1060 -------------- = 1166 1.5 + (700 x 1.65) = 2321 + 200 = 2521. That is, you need 1166g of resin to achieve a 60/40 fibre:resin ratio; 1155g of resin for the flow mesh; and 200g wastage. Giving a total resin requirement of 2521g. For a cosmetic part of that size, I would round up to 3000g and to have a bit of wiggle room (things like bridging will really drink resin) and allow a bit of excess resin into the part to give a flawless finish. Other variables such as infusion cores need to be worked out separately.
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fgayford
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Edward (21/03/2016)
In 123.jpg file. 1. Gauge the correct amount of resin The amount of resin that your project will need will vary upon its size and the amount of reinforcement you have used; more layers of reinforcement will be able to support more resin. Use the table below to calculate approximately how much resin your finished part will use (see the PART column), and how much you should mix (see the MIX column) to ensure you have enough project will require: see the 234.jpg so we can calculate the resin weight content is 80/(200+80)=28.5%, This is very very low. Is it right? OR we often beliven the resin weight is 40%?
I keep it very simple in my infusion calculations.
I simply weigh my carbon fiber I am using on the scale and what ever it weighs is what resin weight I use. It seems to work out fine each time.
If I see I am short during an infusion I slow the feed line or stop it and mix up a bit more and continue.
Hope this helps
Fred
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Hanaldo
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Trouble is on small infusions you will tend to end up with more resin in the mesh than you do in the laminate.
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ChrisR
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I just weigh everything (mesh included), use that amount of resin then and add a bit for the tubes and pot
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VVS
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These calculations do not work out for me, ive tried the calcs with 700grm for mesh etc and never use anything like the amount of resin the formula as says.
just done two panels at 0.5 mtr each with three layers of 200grm cloth, peel ply, mesh, spiral and 600mm of 6mm pipe and used 310grm of IN2 resin per panel.
according to calcs I should use 300grm in the mesh alone, confusing for me but saves on resin cost.
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FLD
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A nice excel spreadsheet for calculating resin usage would be awesome. Anyone fancy doing one? :lol:
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Hanaldo
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FLD (28/03/2016)
A nice excel spreadsheet for calculating resin usage would be awesome. Anyone fancy doing one? :lol:Already done one, but it's part of my quote system... Wouldn't actually mind sharing it if you want it. Pretty simple, you enter the length and width of the part and then tell it how many layers of each type of fabric. Then it tells me how much the part will cost me, how much I should be charging for it, how much resin it will use, and if I tell it to it will subtract the amount of material used from my current stock list. I freakin love Excel 
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erdemy1
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robenergy
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+xFLD (28/03/2016)
A nice excel spreadsheet for calculating resin usage would be awesome. Anyone fancy doing one? :lol:Already done one, but it's part of my quote system... Wouldn't actually mind sharing it if you want it. Pretty simple, you enter the length and width of the part and then tell it how many layers of each type of fabric. Then it tells me how much the part will cost me, how much I should be charging for it, how much resin it will use, and if I tell it to it will subtract the amount of material used from my current stock list. I freakin love Excel hey hanaldo, hope you're good! any chance you would pm me your spread sheet please?
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