vacuum infusion of an aircraft bulk head

vacuum infusion of an aircraft bulk head using epoxy and carbon fiber with a Soric fabric honey comb core

Category:

Science & Technology

Tags:

• carbon
• fiber
• vacuum
• infusion
• epoxy
• honey
• comb
• soric
• core
• aircraft
• part
• fabrication
• aviation
• space

[atrampus]

New to carbon too, and I have a question regarding this.

If you used this resin infusion method, are the 7 layers stuck together with resin or glue before they are bagged? Also, if this was used in a plug, with curves etc, would you use glue/resin, then infuse it via the vacuum pump?

Thanks, Andrew

[blueberrybill]

No glue was used on this pannel. For tricky curves and odd shapes a small amount of spray adhesive can be used being carful not to get it on the mold surface.

[blueberrybill]

We use a CNC ruter table and a 1/4 inch carbide cutter. A fine toothed blade on a jigsaw will also work and the the fur strand can be sanded smooth after.

[blueberrybill]

bleed release B is available from Air-tech.

It is used between your part and your felt.

[superart01]

what exactly is sorq (im sure thats spelled wrong)?

[blueberrybill]

Soric is a honeycomb core material for infusion. The honeycomb pattern is open with the hexagon blocks keeping the resin to a minimum.

[matthieutje65]

isn't it more easy to put the vacuuminsert in the middle and injection the resin in the tube laying around the carbon fibre?

[ritter188]

and they are actually siphoning in the resin making a resin rich part. This part may call for that but usually in my experience (which isn't much just a college student) you allow the vacuum to do the work pulling the resin in.

I hope this answers your questions.

[ritter188]

@CineGolem

I don't know much about Soric, but it obviously is very strong. If their vacuum is 29.7" Hg (mercury) which is equal to 14.7" pressure per square inch. With at 30" by 50" panel that makes for 22050 lbs of pressure on that panel.

A good estimate of resin is, weigh your material let say 400g then get 20% more than 400g of resin + your hardener. The laminate should only let in around a 60-65% fiber to 40-35% resin ratio.

[ritter188]

I don't know much about Soric, but it obviously is very strong. If their vacuum is 29.7" Hg (mercury) which is equal to 14.7" pressure per square inch. With at 30" by 50" panel that makes for 22050 lbs of pressure on that panel.

A good estimate of resin is, weigh your material let say 400g then get 20% more than 400g of resin + your hardener. The laminate should only let in around a 60-65% fiber to 40-35% resin ratio.

[CineGolem]

@blueberrybill --Awful long time since this was posted (btw- thank you), but I was wondering how the soric isn't crushed by the vacuum pressure. Also, how do you calculate the amount of resin needed? TY!

[datzfast]

@blueberrybill question about soric what is the lightweight material in it that doesnt get wetted out ? the filler made of?

[hypobaric1]

I can do all this and make it super strong first time, its way to flopppy

[DanFrederiksen]

looks a bit floppy. at 4 liters of resin, should it be stronger at that weight? I imagine that a thicker honeycomb sandwich plate is much stiffer.

[newarm]

The video says you guys are in Vancouver. B.C. I'm a prosthetic technician doing some research on materials and systems for laminating and would love to chat and visit you facility. Thanks for responding. Daryl.