Super 7 Mirrors

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Super 7 Mirrors

Super 7 Mirrors

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scottracing	scottracing posted 9 Years Ago HOT Topic Details
Group: Forum Members Posts: 460, Visits: 5.2K	I've been looking to make a few bits for my mates sevens, but with work and not having the correct materials to hand its taken until now. After the issues I had with my first mould (my mistake due to part undercuts) I borrowed my friends machined ali mould, it needed a good bit of prepping as it still had a lot machining marks due to the depth of cuts, but after a 400grit wet and dry start all the way up to metal polish, this was the end result. I tried getting the tool into my laboratory oven and it will fit but is very tight, and i would still need to run the vac lines and make sure the bag isn't damaged, so I took the chance on trying a bit of wet lay but using a vac bag to give better consolidation and get a bit of the resin out of the laminate. I have a background in laminating, but with prepregs in the aerospace and Motorsport business. I had forgotten how much I hate wet lay, its messy, the fabric doesn't stay in place and its just generally a nuisance, especially with a short pot life of 40mins with the resin The resin was starting to go off as i was laying the last ply, I used a 240gsm 2x2 Twill for plies 1 and 3 and 310gsm NCF ±45° to bulk it up, the NCF doesn't drape into such deep pockets very well so i had to dart it and cut into stripes, but here's a photo of it all in the vac bag. And what was the result you ask? Well I didn't use as much release film as I should have as I was trying to save it, so some of the breather caught to the resin but no big issue. There were a couple of dry spots and a few pinholes, but the parts are for a race car so I will just give them a quick flood coat of 2k lacquer. I was thinking of laying the dry fabric plies on some released glass or release film and impregnating them with resin before laminating them into the tool? Would this be a better way of doing it? as trying to wet out the plies in the tool was a real pain even though I used loads of resin and stippled them with a brush. After a bit of trimming and sanding the parts looked good, I cant recommenced the perma grit tools enough!! the little disc cutter on a dremel was awesome and the sanding blocks make short work of sanding back to the trim lines, wish I had a set of them a few years ago! For a first quick shot using wet lay and a vac bag, using non-perf release and heavy breather the results aren't bad, the surface finish is of course good as its a polished ali tool. But I need to address the dry spots in the first ply. Any recommendations on what you would do, and yes I know infusion is the next way or cut the tool in half so I can use prepregs
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Super 7 Mirrors

scottracing - 9 Years Ago

Hi mate nice job,did you get my pm the other week re work/Bristol ? Was messaging someone the other...

f1rob - 9 Years Ago

Ive found infusion pretty easy and clean but wet lay and vac seems a bit hit and miss, definitely...

VVS - 9 Years Ago

hi rob, i didn't get the PM send us another one? I need to update you on the other 'thing' too :)...

scottracing - 9 Years Ago

Well after a couple more attempts wetting out the plies with the resin, I'm getting better results...

scottracing - 9 Years Ago

Had a trial with this red and black twill, the fabric was a lot less pliable and needed a lot of...

scottracing - 9 Years Ago

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