hood problem


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beliblisk
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Hi guys.

I ran into a bit of a problem today.

So i made e46 m3 hood. All good except for a little bulge (located in middle kevlar/cf "island on the right side o)n the top side (that i didnt notice untill todat when i took glued item from top mould) :/

After mild postcure (sun so max 50*C atm) it came out great so somwhere from that point to prior of bonding halves together this happend (inbetween i was only cutting vent holes).

Stack was as followed (top part) :
-245 2x2 cf
-600 2x2 cf
-200 cf/kevlar

All this time (apart from cutting & triming) paet was laying flat in mould to awoid any accidental damage in workshop. 

Halves arenow bonded and i can not seperate them again.

I was thinking of heating it gently locally with heat gun and then put so soft weight on and let it cool of (as atm TG is quite low...... plan was to let it full post cure bolted on the car and then sand it and get it clear coated). 

Any ideas how this happened and any alternative ways to solve it?

Thanks a lot

Edited 6 Years Ago by beliblisk
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beliblisk
b
Supreme Being (565 reputation)Supreme Being (565 reputation)Supreme Being (565 reputation)Supreme Being (565 reputation)Supreme Being (565 reputation)Supreme Being (565 reputation)Supreme Being (565 reputation)Supreme Being (565 reputation)Supreme Being (565 reputation)
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Posts: 53, Visits: 2.8K

Hi guys. 

Its a bulge not a blister. So just a little "sinked" area about 10cm in diameter and 1mm deep. Other than cosmetic imperfection is good so no delamination or bad surface finish (well apart of some areas when my finger on spray adhesive was to heavy.....light sanding and clearcoting to follow.).

Part was post cured in the mould without removing any of infusion stack (i just balooned vacuum bag to creat greenhouse so T inside would be as equal as possible). Temperatures were relatively low so i guess on flat panel like this its shouldnt be a problem since you can stick IN2 directly to 60C. I know its not ideal but i dont have big enough owen atm. 

After demould part was great.

Hence my mindfuc* here. How it could be bent at later stage when i was only using cuting/sending. When i wasnt working on the part it was sitting flat on the mould to awoid any accidental scratches in the workplace.

It does only need little force to be bent back out so i was planing like mentioned just heat it a bit and put few kg led shoot filde bag to sit on itSmile

Have fun

GO

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