Permanent Bond of these two items
Permanent Bond of these two items
(OP)
Hello
I want to permanently bond a metal plate to a plastic box. I don't know details of the materials, but I have provided images here that hopefully will give those in the know enough for a good guess.


The box will hang from the mounting plate when used in a stage performance environment. I will try to treat it kindly, but it will unavoidable take some abuse. I would like to bond to be as strong as the plastic box itself. I would use screws, but because of the way the electronics are mounted in the box, this is not practical.
The plate is 5" x 2". The area on top of the box between the two ridges that define the flat top portion is about 6.5".
I have some J-B Kwik Weld, but I figure I have only one shot at this so I had better seek expert opinions first.
I want to permanently bond a metal plate to a plastic box. I don't know details of the materials, but I have provided images here that hopefully will give those in the know enough for a good guess.


The box will hang from the mounting plate when used in a stage performance environment. I will try to treat it kindly, but it will unavoidable take some abuse. I would like to bond to be as strong as the plastic box itself. I would use screws, but because of the way the electronics are mounted in the box, this is not practical.
The plate is 5" x 2". The area on top of the box between the two ridges that define the flat top portion is about 6.5".
I have some J-B Kwik Weld, but I figure I have only one shot at this so I had better seek expert opinions first.





RE: Permanent Bond of these two items
RE: Permanent Bond of these two items
RE: Permanent Bond of these two items
RE: Permanent Bond of these two items
Is part of the adhesion issue that that same layer of adhesive has to bond to both surfaces? I guess I'm asking if a VHB double sided tape like 3M 5952 would give me a better shot at strong permanent bond?
RE: Permanent Bond of these two items
Would this help given that I don't know the composition of the plastic? I think the metal plate is powder coated aluminum, but I'm not even 100% sure of that. Would the adhesion promoter help with J-B weld type adhesive or only with the VHB tape? How about J-B Plastic Weld? Would that not work on the metal plate?
RE: Permanent Bond of these two items
B.E.
You are judged not by what you know, but by what you can do.
RE: Permanent Bond of these two items
I personally would use VHB, only to provide fixturing while an adhesive like 3M #5200 or an unfilled RTV silicone cures to full strength.
Mike Halloran
Pembroke Pines, FL, USA
RE: Permanent Bond of these two items
Mike Halloran
Pembroke Pines, FL, USA
RE: Permanent Bond of these two items
Are you sure the housing does not have a recycling code on it that identifies the polymer? You can call the manufacturer to ask about the material. There are some do-it-yourself polymer identification tests, but you would need to remove a piece of the housing and the tests are destructive.
You are correct that surface energy is an important factor. The adhesion promoter would be helpful for either the bulk JB epoxy or the tape adhesives assuming the plastic housing has low surface energy. I think your plastic housing likely is not low surface energy, so the epoxy probably should work fine.
RE: Permanent Bond of these two items