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Glue thickness?
On Fri, 05 Mar 2010 19:30:36 GMT, Reno wrote in
rec.boats.building: Paint each side of dry wood with unthickened epoxy so it will be absorbed. Wait a few minutes but don't let it cure. Reno, thanks. I made the sandwich just two hours before, and, maybe that looked a bit unclear, I did not do such work for the first time. But after having had some mess aroudn the workpiece after applying far too much some time ago, another time woo little, I wanted to approach it in a more deterministic way this time. So, I calculated the amount of resin for a layer of 0.2mm thickness, added some 10% for the soaking of the surfaces, and did it then exactly like you said - first "priming" both surfaces (after carefully cleaning them)with unthickened resin (West 105 resin, 206 hardener to achieve more pot time), then thickened the remaining about 80% of the mixed epoxy with cotton fibres and fillet blend fibres until the stuff had a marmelade-like consisistence, then spread that with a piece of hardfibre board over one surface, trying to get a pretty even distribution. Prior, we had scaped two thick pieces of timber exactly to the needed curvature. The two layers were put togehter after adjusting the positions exactly, and then clamped to the templates, using strips of thick timbers to press the layers down evenly. Almost everywhere, the glue protruded a bit from between the layers, showing that the pressure seemed to be distributed evenly enough. Now the glue cures til tomorrow, then I'll use the same templates to glue a supporting reinforcement frame. Thanks for all your comments, and Paul, I'll try the cloth layer method some time! Cheers, U. |
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