When vacuum infusing what core makes for a lighter part? Which one is stronger?
Soric?
Divinycell?
Etc?
By the way…how much resin do the channels and holes in infusion divinycell absorb?
check datasheets. I like corecell more, is a bit thougher than PVC foams.
It also depends on what weight and thickness you use.
Soric makes strong and stiff parts and works perfect in infusion.
3D Core is slso a very good product but the pieces are a bit too big for small aplications. It works good in infusion. Stiffness and strengs is great and weight just a bit more than foam.
Foam depends on weight and structure, but is good for most parts.
check the data sheets per product number. each system probably would have density rating (PSF (pound per square foot)) which would then be obvious. As for strength, again, each product is different, even in the same series, density changes factors.
I don’t seen in their data sheets where it says how much resin they soak up. Can someone please post a link.
Soric says about 750kg/m³, in real about 850kg/m³. Closed foams do not suck any resin.
I hope you mistyped that. When I convert your numbers to to English I come up with roughly 2000 pounds per square yard.
Actually it’s a typo on their sheet. No way this stuff ways 750 kilograms per anything. That’s 1650 pounds.
But the other guys don’t say anything about resin uptake. I know closed cell doesn’t suck up resin, but the holes and groves in them do and I was wondering about that.
They are talking about cubic meters. You are thinking in square meters.
Ah that makes sense. Thanks.
The stuff is still awfully heavy though. 750kg per cubic meter, means a 5mm thick piece that is one meter square is 3.75 kilograms or 8.25 pounds. Or almost 7 pounds per square yard.
Thats my impression too. As much as I like vacuum infusion it is still a too heavy solution. There is a closed cell nomex honeycomb. However lacking channels and holes it looks very difficult to infuse
Correct , closed cell foams don’t absorb anything but you still need to fill the surface pores of the foam. I’ve noticed on thin laminate cored panels this resin uptake is a considerable percentage of the overall panel weight. Whereas on a thicker cored heavier laminate panel this percentage is lower. Also I find with an infused panel it will be heavier in the light laminate scenario as all the pores are filled 100 percent whereas a wet lay up vacuumed panel the pores aren’t so filled and under vacuum any remaining air in the pores expands and expells the resin bleeding through the laminate and into the consumables.
Saying that… wet lay-up vac Yuck!!
I note Soric have a Low Resin Consumption core now and am thinking if trying it out has anyone here tried it any feed back would be welcome?
Soric LRC
(Low Resin Consumption)
2mm & 3mm
Latest grade in the Soric product line. Has a resin uptake of about 350g/m2/mm
Am I reading the resin consumption correctly as 350g per square meter per millimeter of thickness?
Yes thats correct. In real it is a little more than the 350g/m²/mm, but less than the standard soric.
Do you have a link for the closed cell nomex honeycomb? I googled it and got nothing.
eurocomposites
They have a patend and they do not sell this core. As far as I know their system is based on a special membrane that is placed on both sides of the honeycomb before they infuse.
I tried to get a sample once with no luck, they would barely talk to me about it. My guess is that its an impermeable film adhesive.
I got the price and they were very willing to sell it.
For 20m2 in 12mm thickness they asked 50 euro per square meter. For my ultralight plane I could afford it as it is a crucial component
Soric XF: ca. 500 gr/m2/mm
Soric SF: ca. 600 gr/m2/mm
Soric LRC: ca. 350 gr/m2/mm
Foam: ca. 500 gr/m2/side
Balsa: ca. 700 gr/m2/side
This is what I calculate with, and usually I am not too far off.
This is only resin consumption, you will need to add the weight of the core itself, and also of the extra resin used for grooves and holes. Also keep in mind the extra exposed surface of grooved cores. It is a considerable factor.