Make a fiberglass fan shroud
(→Forming the circular part of the shroud) |
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[[Image:20wax and PVA.JPG|center|600px]] | [[Image:20wax and PVA.JPG|center|600px]] | ||
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| + | Cut strips of 1 1/2 oz fiberglass mat on a peice of cardboard, ready to be wetted out. | ||
[[Image:21mat strips.JPG|center|600px]] | [[Image:21mat strips.JPG|center|600px]] | ||
| + | When wetting out mat with resin, many people make the mistake of working the resin into the mat while it is on the wet out board. This is a mistake and will only make a resin rich, inconsistant part. You only brush enough resin on to cover the mat with resin, it will soak in. | ||
| + | Notice in the picture how there are some areas of mat that are darker, and have become transparent. There is no more resin on those strips than is on the others, they were wetted out earlier and have soaked up the resin. | ||
[[Image:22wetting out strips.JPG|center|600px]] | [[Image:22wetting out strips.JPG|center|600px]] | ||
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| + | You do need to be somewhat swift with this part of the laminating process, as time goes by the resin will dissolve the binder that holds the mat together and make picking it up to apply it to the part a very frustrating activity. It will just fall apart. | ||
[[Image:23wetting out some more.JPG|center|600px]] | [[Image:23wetting out some more.JPG|center|600px]] | ||
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| + | Brush some resin on the surface of your buck. | ||
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[[Image:24wetting surface.JPG|center|600px]] | [[Image:24wetting surface.JPG|center|600px]] | ||
[[Image:25wetting out buck.JPG|center|600px]] | [[Image:25wetting out buck.JPG|center|600px]] | ||
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| + | Pick up the material from the wet out board and apply it to the part. Don't try to push it ito any inside corners or stretch it over any outside corners just yet. | ||
[[Image:26applying material.JPG|center|600px]] | [[Image:26applying material.JPG|center|600px]] | ||
[[Image:27more applying material.JPG|center|600px]] | [[Image:27more applying material.JPG|center|600px]] | ||
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| + | Stretch the material over any outside corners, don't try to fold it, it will only spring back. | ||
[[Image:28stretching over corner.JPG|center|600px]] | [[Image:28stretching over corner.JPG|center|600px]] | ||
[[Image:Even 29more applying material.JPG|center|600px]] | [[Image:Even 29more applying material.JPG|center|600px]] | ||
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| + | I made a roller out of some threaded rod, a file handle and some 1/4 rod. It works extremely well for rolling out air bubbles in fiberglass. Move slowly,applying enough pressure to roll the air out, but not so much pressure that you move the mat around of push all of the resin out. "Dry" spots will show up as white strands of fiberglass that spring up out of the resin. | ||
| + | You can use a brush, foam roller or your fingers to manipulate the air out. Squeegees don't work on mat. | ||
[[Image:30rolling out the air.JPG|center|600px]] | [[Image:30rolling out the air.JPG|center|600px]] | ||
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| + | You can see the difference between a rolled out area with no air, and an area that has air in it and is not laid down properly. | ||
[[Image:31rolling out some more air.JPG|center|600px]] | [[Image:31rolling out some more air.JPG|center|600px]] | ||
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| + | when you roll into a corner, dwell there with the roller for a second. This will allow the air to come out of the corner. | ||
[[Image:32dwell in the corners.JPG|center|600px]] | [[Image:32dwell in the corners.JPG|center|600px]] | ||
| + | Roll over a corner, not parallel with it. | ||
[[Image:33rolling over the apex of the radius.JPG|center|600px]] | [[Image:33rolling over the apex of the radius.JPG|center|600px]] | ||
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