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Mold making advice and fail.
Mold making advice and fail.
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Mold making advice and fail.
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simyboye
simyboye
posted 10 Years Ago
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Hi there,
New here and I'm trying to get my mold technique down but failed last night.
Using epoxy gel coat and used AFH release agent x 3 and polished...
This is the second mold I had made of the same part however on my second attempt when releasing the mold ended up with the mold breaking into many pieces.
Any ideas?
Used gel coat for two passes then 2 sheets FG matting for the strength however not sure what I've done wrong.
Was the mold not rigid enough or not enough release agent?
Many thanks in advance.
Jay
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simyboye
simyboye
posted 10 Years Ago
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Many thanks.
I'll use csm this time. Will report back shortly.
Thanks again
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MarkMK
MarkMK
posted 10 Years Ago
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On another note regarding using the epoxy gelcoat, as opposed to polyester - it can be a little thicker and more prone to holding on to trapped air in corners, especially if laid on quite thick in the first coat.
Probably best to make sure it's warm enough and applied quite thinly at first before awaiting a firm tack and laying down a second thicker coating. Might save you having to fill in little surface holes later. Don't ask how I know.
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Matthieu Libeert
Matthieu Libeert
posted 10 Years Ago
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like above looks like your mould is to weak, you need a strong mould to make your mould pop out of the mould
Matthieu Libeert
Founder MAT2 Composites X Sports
website:
www.mat2composites.com
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Mold making advice and fail.
simyboye
-
10 Years Ago
No where near strong enough. Looks like you've used surface tissue for one, did you just do 2 layers...
Hanaldo
-
10 Years Ago
Many thanks for the reply. So you think it's simply the mold not being strong/ thick enough? I did...
simyboye
-
10 Years Ago
You mould should be 2-3x the finished part thickness, so if you want a 1mm thick finished part your...
ChrisR
-
10 Years Ago
Many thanks. I'll use csm this time. Will report back shortly. Thanks again
simyboye
-
10 Years Ago
On another note regarding using the epoxy gelcoat, as opposed to polyester - it can be a little...
MarkMK
-
10 Years Ago
like above looks like your mould is to weak, you need a strong mould to make your mould pop out of...
matthieutje65
-
10 Years Ago
Also if you plan on vacuum bagging the finished part, a strong mold will resist against...
Chris Scott
-
10 Years Ago
Getting there with the molds but that fender has some weird angles etc so jumped in the deep end....
simyboye
-
10 Years Ago
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