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woodcore surface preference for best bond strength?
Posted: Thu Mar 14, 2013 8:16 am
by kungpowd
Just curious as to wether some of you folks have found any serious difference in bond strength with a sanded or planed woodcore surface?
Posted: Thu Mar 14, 2013 9:40 am
by skidesmond
I haven't found any difference.
Posted: Thu Mar 14, 2013 10:45 am
by vinman
Literature says a planed surface leave the pores open to allow the glue to penetrate. Sanding with less than 100 grit destroys the pores and may be less strong.
Posted: Fri Mar 15, 2013 4:27 pm
by MadRussian
Vinman wrote:Literature says a planed surface leave the pores open to allow the glue to penetrate. Sanding with less than 100 grit destroys the pores and may be less strong.
After router profiler I will need to make couple light passes with sender. What's the best grit for sandpaper to make final pass?
Posted: Fri Mar 15, 2013 5:18 pm
by gozaimaas
I have used 80 grit to finish without issue
Posted: Fri Mar 15, 2013 6:49 pm
by vinman
I use a planer so this is just my opinion based on what I've read. It probably doesn't make a ton if difference.. But if it were me I'd use 100 grit for a finish pass after profiling.
Reseasrch and Read for yourself
http://www.cedengineering.com/upload/Ad ... terial.pdf
Posted: Tue Mar 26, 2013 6:41 am
by Richuk
Found this paper yesterday. I think the answers are fairly complex, but if you assume best practice is a core with a low moisture content, planned and the wood within the core is partly chosen because it is porous, then you should start to optimise your results.
http://www.fpl.fs.fed.us/documnts/pdf20 ... art001.pdf
I would factor in the ramp rate at which the press is ramped through the temperature range at which the epoxy/resin is at its lowest viscosity.