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R12chard
8th April 2005, 11:13 PM
Can anyone provide me with instructions on how to finish the edges to be glued, I note the previous responses to the message entitled the same or a link to an informative instruction site.

I look forward to your knowledgeable replies

Many thanks Richard.

echnidna
9th April 2005, 10:11 AM
I run it all pieces through my thicknesser so they are flat and parallel and glue up the same day.

Jeff
10th April 2005, 03:25 AM
The two surfaces need to be close-fitting and smooth, free of dust and other contaminants. The type of wood and the intended use are important factors in choosing the glue. In all cases the glue should be spread evenly across the surface of at least one side, without voids. Some wood will suck up a lot of glue, others very little. In some cases where the wood will suck up a lot of glue I find it often works well to "precoat" the wood with a layer of glue, and let it set before I apply another coat and do the final glue up. In this case, there will be a more visible "glue line" when the piece is done. Some wood is very tight grained and a bit "oily" and won't glue up well unless the correct glue is used. I suggest that glued up pieces be either clamped or weighted to keep them in position and tightly secured. A common mistake is too clamp too tightly. If you see the glue evenly forced out around the edges the clamps are tight enough, and tighteneing any further is not going to improve things. If you don't see glue coming out, you may not have enough. Try to match the glue amount to the project so that just a little drips around the edges, more and you're wasting money. Please consider the end use of the project when selecting your glue. You will have to talk with woodworkers experienced with the particular type of wood to know what your choices are. Also, if your project is intended for food service then don't use a glue that will leak toxic components into the food. Use of a planer or jointer to produce flat smooth surfaces is an excellent way of preparing pieces. You can also use your lathe to cut concave and convex pieces to fit together, the criteria is that the pieces fit together well. Consider which way the wood grain of each piece will deform when cut compared to the others it is glued to, and use the forces to counteract or compliment each other as desired. By that I mean that when some wood is cut away from a larger piece, the internal stresses and structure will change, and the wood will change in shape as a result. An awful lot of long winded answer here, but all these factors and more are involved, and simply saying to use type X glue is not an answer that will apply in even two cases. A bit of education about the basic types of glues will be very valuable to you in the long run, that would be a great place to start.

CHJ
10th April 2005, 05:51 AM
Some more reading re: "Glues"

http://www.ukworkshop.co.uk/forums/viewtopic.php?t=1804&highlight=glues