I am making Norm’s router table (with some mods). I glued two pieces of 3/4 mdf together and edge banded with 7/8’s white oak. I need to cover the top with HP laminate. I have no experience with this. When I bought my materials at a local cabinet maker supply house I explained what I was doing and asked for recommendations. I bought a 4×8 piece of white Formica that was in a roll. For contact cement he sold me a product called Conbond 690 contact adhesive (spray). In norms video the plans calls for coating both sides. Place dowels every 8″ or so. This allows you to align the top to the bottom and then pull out dowels one by one from center to outside. Use a J roller and press it down. My question is what is the best way to cut this material down from a 4×8 sheet to a usable size. Secondly, should I rough the mdf and oak trim prior to coating with adhesive? I just cut the plastic sleeve off of the Formica and I have a big piece of U shaped Formica laying on my floor. Will this stuff straighten out or should I weight it down or sandwich between two pieces of 4×8 ply? My table top is 27″x46.5. Can I use my 890 with a flush trim bit, or should I invest in a laminate trimmer. I have looked at the PC and could purchase it if necessary. After it sets I plan on chamfering the edge with a 45. Do I need to worry about chipping? Sorry for all the questions, but I have invested a lot of time so far and would hate to blow it now. Suggestions would be appreciated.
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Replies
Here are my answers to the questions you pose:
1) Conbond -- I don't know this particular contact cement, but I am bothered by the spray part (I assume it is in an aerosol can). I prefer to apply with a disposable low nap roller -- 2 coats on the MDF, one on the laminate. For absolutely failproof bonds, I still prefer the old fashioned (highly flammable) stuff -- which I will apply in my garage (to keep it out of the house and away from pilot lights, etc.).
2) Lay your laminate on a flat surface (the floor will work, if you don't mind being on your knees), clamp a straight edge to it, and score it about five times with a utility knife, then just snap it. There are other ways, but this is the easiest. remember you are just breaking the sheet into a manageable size, not trying to get a "finished" edge.
3) The curl will go away if you weight if down with a couple of boards (on a flat surface).
4) It wouldn't hurt to rough up the MDF and applied oak edging, but it is not really necessary.
5) I actually prefer a regular size router for all the kind of machining you describe. You need buy a laminate trimmer only if you are looking for an excuse to add one to your collection of routers (they are worth having).
6) When chamfering the edge, chipping will not be a problem -- as long as your bit is sharp. Do about three passes, with the final pass taking off maybe a 1/16". You might also want to file the very edge of the laminate ever so slightly to remove the sharpness. A laminate file works best, but a mill file will work too.
7) Dowels every 6-8" will work fine (I use 3/4" dowels, which I keep around for this purpose, but 1/2" will work also). I even know some folks who use venetian blind slats, but that is cutting it little too thin for my taste. Just be sure to remove the middle dowels first, and work toward each end -- this will help you avoid air pockets.
You will find the process is really very easy and straight forward. I am somewhat concerned about your chosen adhesive; but if you got it from a laminate supplier (as opposed to a big box), it should be fine, as long as you follow the instructions.
Good luck.
Edited 9/9/2004 9:38 pm ET by nikkiwood
Thanks, the adhesive is a commercial product. It has a msds on the label and is very flammable per the label. He also suggested I wear a respirator and properly ventilate the area, which I will. I had requested the roll on type, but the guy at the supplier said the pro's use this it is easier to apply and gets better results. This is a wholesale place to cabinet makers in our area that I was referred to by a local cabinet shop. The guy originally would not sale to me because he only deals with businesses. When he asked my name I added the word cabinet shop to the end and he happily set me up an account. I have some spare mdf, and I may even do a trial piece just to practice. I have never heard of a laminate file, but I will go back to the shop where I bought the laminate and see if they have one. Thanks again for the advice.
Those people are pretty reliable, so this cement should do just fine. Just be sure you have enough on hand before you do the job. And however many spray coats you put on the laminate, I would double that for the MDF (because it is more porous).
I wouldn't bother with a laminate file, unless you see a lot of this work in your future. You only want to break the sharp edge -- so little in fact, that it is hardly perceptible. Even some 120 grit sandpaper on a block will do this.
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