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Problem with emblem molds
Problem with emblem molds
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Fasta
Fasta
posted 9 Years Ago
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Bridging is where your fabric has not been able to properly follow the shape in your mould. So where you have your badge detail your fabric must be loose enough or cut in appropriate places to allow it to move and slide etc into the details of your mould.
These fabrics don't stretch at all so when laid over these details it will float or "bridge" from one point to the next leaving a gap under the fabric which can then only fill up with resin and air which appears to be exactly what you have. Bridging often happens in corners and any detail areas as you have.
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upstaterider
upstaterider
posted 9 Years Ago
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Thanks for the reply guys. Yes I was wet laying than vac bagging. Ill try soaking the material before laying it. What is bridging and what causes it? I am completely self taught on composites so I don't know all the terms
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FLD
FLD
posted 9 Years Ago
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I've seen this with wetlay / vac bag before. You can really poke the cloth into the corners before applying vacuum but you still get this problem. For me it was down to the release film. The film I had was a certain perforation rate which didn't allow enough resin through into the breather. The resin flows around the cloth without going through the film and you end up with resin collecting in the features like this. The bubbles you have are probably this problem combined with not degassing your resin sufficiently. Try switching to a higher perforation level on your film or try lowering the resin loading on your lay up.
Hope this helps
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scottracing
scottracing
posted 9 Years Ago
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are you just doing wetlay and vac bag? as above it looks like you have got really bad bridging. I would suggest wetting out the material before laying it into the mould and make sure you dib it into the tight corners prior to bagging it up
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ajb100
ajb100
posted 9 Years Ago
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Looks like it's bridging to me?
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upstaterider
upstaterider
posted 9 Years Ago
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Hello all. New to the forum...but have been doing carbon work and fiberglassing for quite some time. Having some issues with my carbon fiber emblems. I am using a vac bag set up with a couple fiberglass molds I made. They have a super smooth orange gel coat and have release wax and pva. Everything looks great at first but No matter what, can't get these things to come out right. Any ideas?
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