Gluing plexi inside Uchannel

[Kevin B.]

RME has hooked up me twice on this project, now I'm coming to you all a third time. I need to glue some 1/4" aluminum U trim around the edge of some 3/16ths-ish plexi. Too much play between the OD of the plexi and the ID of the trim to bolt/rivet it and make it look good, so I'm thinking some kinda badass adhesive. I need the trim to hold the mild convex curve of the plexi, so I probably can't just goop it up with silicone and expect it to hold. I'm thinking epoxy and would love to know if there's a specific kind I should be looking at that likes aluminum and acrylic, and I'm open to other ideas too.

 

[MikeGyver]

post picture of what you're working on.
You could shim the acrylic to fit tightly in the channel and then rivit/bolt, but being acrylic drilling/bolting that close to the edge isn't the best idea.
You might be able to just smash the u channel closed for a tight fit then silicone/epoxy it. I think the design of the structure is primarily whats going to keep the curve in the acrylic.

Acrylic is a thermoplastic; depending on the shape you're after you might be able to easily form a heated sheet and completely do away with the perimeter structure.
http://www.youtube.com/results?search_query=acrylic+thermoforming