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I need to make a holder for a flexible (engine) air filter. The holder is an oval ring about 200mm x 120mm and 20mm deep. The section of the holder is a channel 20mm x 10mm with the open side pointing inwards and the material thickness wants to be about 1mm. The internal corners want to be reasonably sharp, say less than 4mm radius. The external corners don't matter. There are no particular stress requirements but the holder needs to be reasonably robust since inserting the zig-zag wire-mesh & cloth filter requires some manipulation. I've made a mould with a removable faceplate but am at a loss as to what weight or type of reinforcement to use.
As a novice in such matters, my starting point is to use 4 or 5 layers of fibreglass tissue in shortish lengths to minimise crinkling up the sides. And to use EL2 resin in order to accommodate the amount of time required to lay. But I suspect that this would be a bit flimsy.
Would a few layers of a light cloth lie adequately into the corners and not require extensive cutting to avoid crinkling up the sides? Is there a suitable carbon-fibre reinforcement that would be better than glass?
I would greatly appreciate any assistance.
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