How do I put carbon over a block of foam?


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Fastskiguy
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Fastskiguy - 10/27/2020 7:28:44 PM
Fastskiguy - 10/23/2020 11:54:18 PM
I like both of those ideas....I'm going to try both of them! Thanks guys Smile

The 6 piece experiment went pretty well but the 3 piece went even better....one large to go around and two small pieces on the ends. Now....do I just grab a sanding block and go to town on those edges?




Fastskiguy
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Fastskiguy - 10/23/2020 11:54:18 PM
I like both of those ideas....I'm going to try both of them! Thanks guys Smile

The 6 piece experiment went pretty well but the 3 piece went even better....one large to go around and two small pieces on the ends. Now....do I just grab a sanding block and go to town on those edges?


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6 piece.jpg (75 views, 2.00 MB)
3 piece.jpg (60 views, 2.00 MB)
Fastskiguy
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I like both of those ideas....I'm going to try both of them! Thanks guys Smile
Hanaldo
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A cube is significantly harder to wrap than a surfboard. All about the radius! 

I would actually suggest not trying to wrap around the corners, but rather try the technique demonstrated in EC's skinning tutorial (skip to 6:25):

https://youtu.be/aqwhcfQZT8U

To do that, I would cut 6 individual pieces of carbon that are each slightly larger than the sides of the cube, and stick them down to the base coat. When the base coat has hardened more, trim off most of the excess but leave a 2 or 3mm overhang as Paul demonstrates in the video, wet the carbon out with resin, and then once hardened you can sand the carbon back to the shape of the cube. That will give you a very nice neat seam on all of the radius that will be quite hard to spot, but avoid the problems you are having.
torsten Ker
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if you make 3 carbon pieces,
1 long one to cover the shorter sides with one long 1" wide strip in one go with opverlapping the corners and and then later cover the top and bottom 6"x3 1/2" sides
sometimes I use cling film to hold the overlapping corners down by wrapping it on top of the fibre

and you need a very sticky basecoat like the XRC basecoat, may get a small quantity on EC's website


Edited 4 Years Ago by torsten Ker
Fastskiguy
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torsten Ker - 10/23/2020 11:53:21 AM
how did you get on with the cube

Not good (yet).

I picked up some cheap fiberglass and it is more flexible and cheaper while I try to figure out how to do this. It's those damn corners. I need a cube with fewer corners I think Wink

Getting it all tacky then sticking it on with my hands is working pretty well. I'm using masking tape to hold the edges then after it hardens I can peel the tape off. Doing one edge at a time and simply overlapping the fabric wherever it happens to land. Once I get a cube actually covered with fabric and epoxy I am hoping I can fine tune my procedure. 

I'm really surprised I'm struggling so much. Back in the 80's I made a surfboard and I don't remember having any kind of trouble like this!

Joe

torsten Ker
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how did you get on with the cube
torsten Ker
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I would cut the fibre while pressing it onto the base coat,the image was only a demo how to overlap
you can do multiple sections, does not have to be one piece, that may be better because you cube is quiet small

torsten Ker
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I would suggest to cut is insitio, when putting it on, this was you can press the fabric into the base coat preventing the end from comming out


Fastskiguy
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Dentex - 10/16/2020 11:37:24 AM
Fastskiguy - 10/16/2020 11:28:14 AM
torsten Ker - 10/16/2020 9:09:57 AM
I did one side at the time with overlapping the fabric on the flanges, then sanding them flat, then coating them
The style of the door was like the European doors and frames with double seal

I would do the same with your cube with the fabric folded around it like a cardboard box overlapping on the shorter sides and corners for 1cm
You could even do a paper cut template for the fabric first before cutting to shape

basicallt fold like this
Cardboard Box Template - 17+ Free Sample, Example, Format Download | Free &  Premium Templates



Awesome! A picture is worth a thousand words thanks!! Just one more question....how do I keep the fabric from falling apart when I cut that?

You can use masking tape where you need to make cut so something holds fibers in place. Use it on both sides of fabric and remove them before applying epoxy.

There are also fabrics especially made for cosmetic parts that are somehow binded together to resist separating

OK I'll give the masking tape a shot, thanks guys!!

GO

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