Replies

1. 
   roc | Oct 30, 2012 02:35pm | #1

   Sorry you aren't getting much help

   Glue : contact cement; you know . . . the stuff where you put one coat on each surface, let ti dry a while and then put them together.  The glue stays rubbery and allows the two dissimilar materials to expand and contract (the wood) or not.  The plastic will move a little too but it is temperature dependent not humidity dependent.

   Routing : I have never routed plastic but you want the slowest speed (and them some) and it would be worth honing a new bit extra sharp.  You may even want to look into getting a milling bit from a machine shop supply designed for milling plastic.  They are extra sharp.  Any dullness and the bit is going to heat the plastic and then you got a real problem.

   I would definitely do a test pass or two on some long scraps.

   I think from there to get a glossy surface you can heat the edge briefly with a flame but again I have never tried it.

   If you want facts for grind angles (proper bits for cutting plastic ) and how fast to turn the bits for best results look here:

   http://www.amazon.com/Machinerys-Handbook-29th-Guide/dp/0831129034/ref=sr_1_2?s=books&ie=UTF8&qid=1351621966&sr=1-2&keywords=machinery%27s+handbook

2. 
   Westchester | Oct 31, 2012 06:30am | #2

   Acrylic

   To round over there are files designed for plastic - or a router with a round over bit.  For adhesive as roc says contact cement - for a stronger bond that's a glue  - use epoxy

   SA

3. 
   roc | Oct 31, 2012 10:10pm | #3

   Test that bond

   Epoxy

   hmmm

   I could easily be in error here, not having tried it , but as I understand it epoxy does not stick well to plastic.  The best plastic to plastic glue is one that chemicaly melts them together.

   So I'd say give that one a test or two before going for the finishline.  I know people epoxy repairs onto fiber glass etc but they are roughening the heck out of the surface and there are the glass fibers there to get a hold  of by the epoxy.

4. 
   Westchester | Nov 01, 2012 05:58am | #4

   Epoxy

   For plastic to plastic I use the stuff the plexi glass manufacturers sell over the counter - it's called "plastruct";   for welding / bonding acrylic, lucite, plexi, etc.  I know those guys have better stuff they use as pros but I can't find out the brand - they ain't talking.  Maybe someone here knows and could tell us.  Anyway for the acrylic to wood question....... is why I said epoxy.  And yes I would rough up the surface some - just with some 400 paper - but not so much to distort or badly cloud the plastic.

   SA 

1. 
   VAM | Nov 01, 2012 07:22pm | #5

   Plastruct is a brand

   of plastic products in various structural shapes.  They sell a variety of glues: plastic weld, bondene, weldene, etc.  Check their web site plastruct dot com

5. 
   roc | Nov 01, 2012 11:38pm | #6

   Aaaaalllll righty then.

    BillA,

   Old bean . . .

   you might want to go to the source on this one

   http://www.systemthree.com/reslibrary/literature/The_Epoxy_Book.pdf

   you will see a totally white window; just use the slider and page down; you will start to see text.

   page down to page 30

   This is from a most excellent book on epoxy and the uses of the nasty poisonous stuff.

   The people who provide the book are these guys

   http://www.systemthree.com/

   An excellent company.

   I posted a screen shot.  I couldn't cut and paste; the book is a PDF and it wouldn't let me.

   Like I said not my experience just what I came across during one of my regular mad forays into woodworking from my easy chair.

   :    )

   
6. 
   Routerman | Nov 17, 2012 10:54pm | #7

   It's what I do.

   Not a problem to round over, but bevels are more typical.

   Either is done on the router table with an anticlimb cut.

   Stay = to or <3/16" square waste/pass.

   Wet sand if a dressy edge is required.

   Finish @ or ~ 4oo grit. SIC or Aluminum Oxide, both ok.

   I do not use adhesives for AC to wood or any other substrate.

   Methylene Chloride is standard (AC to AC) but toxic.

   I use hardware.