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How to get a gloss finish one B side with resin infusion
How to get a gloss finish one B side with resin infusion
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How to get a gloss finish one B side with resin infusion
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zappafile123
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zappafile123
posted 5 Years Ago
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Hi there,
I'm new to making CF products and am after some tips on how to achieve a high gloss finish on the peel ply or B side of a small part made with resin infusion. Specifically I'm making custom road cycling shoes using a plaster casts of my feet. I successfully made my first sole on the weekend (laying up the carbon over the foot cast followed by peel ply and a full vacuum bag enveloping the entire foot cast), but have encountered the minor problem of requiring a smooth finish on the inside and outside of a part. I need a smooth finish on the inside so my foot is comfortable, and a neat finish on the outside so it looks good. As you can see from the first two images below, the peel ply leaves a pretty rough finish and I'm guessing from what I've read that thats just what peel ply does no matter what. What can do to make it look good like the third image below? I guess I could make a second carbon mould over the top and use that to sandwich the carbon, but that's too much effort, especially if I want to make shoes for local cyclists to get a bit of cash on the side of my day job. Would painting on some extra resin after moulding and then sanding and buffing it work?
Further, I imagine I ended up with those big wrinkles on the outside finish because I wast careful about how I applied the peel ply. Tips on getting that smooth are also welcomed (just use adhesive? (cause I didnt!))
Thanks in advance!
notice the gloss finish inside and outside the shoe
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How to get a gloss finish one B side with resin infusion
zappafile123
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5 Years Ago
That's a tough one! You'll need a mold or some kind of tooling to shape any surface you want to directly control. Given the shape this means a multi-part mold on the outside if you want a complete...
explorecomposites
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5 Years Ago
Hey Chris, thanks for your thoughts. I'd always make the shoe in two parts and just use carbon adhesive to join the sole to an upper. I need to use an epoxy flexibiliser to make the upper portion...
zappafile123
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5 Years Ago
You can get fairly smooth surfaces using bladder. You wouldnt likely infuse, but use prepreg or wetlayup.
hojo
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5 Years Ago
Trying to infuse the part to come out the mould as a single piece with double glossy sides could only possibly work with matched tooling and a core that can flow resin. Even then it would be difficul...
Warren (Staff)
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5 Years Ago
Thanks for your help Warran, I'll give it a try and report back with the outcome. Barnes make Epoxyglass which appears to be basically the same product as XCR (I'm in Australia so unfortunately canno...
zappafile123
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5 Years Ago
I agree infusion is not the most suitable method for this. Nor is trying to bond the upper and lower sections of the shoe with a butt join, if that was your intention? That would be very weak,...
Hanaldo
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5 Years Ago
The problem with wet layup is getting the carbon to tightly adhere to the mould - basically the carbon needs to envelop about 65% of the foot, and it will just drape at the oblique surfaces; at least...
zappafile123
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5 Years Ago
I do mean wet-lay vacuum bagging, not just wet-lay with no vacuum. You can wet the reinforcement out in between two sheets of plastic film, and then allow it to cure to a b-stage before placing it...
Hanaldo
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5 Years Ago
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