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 Replies: 13 / Views: 285 |
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Pillar of the Community
United States
836 Posts |
I have been experimenting with making my own "Capital Plastics"-style coin holders, using a laser cutter. But the problem I am having is how to fix the layers together. Taping the edges with metallic washi tape looks good and holds well, but makes adding or replacing a coin very difficult. Also, removing and re applying the tape tends to spread the adhesive around, and then the holders pick up dust and look untidy.  I tried something with magnets that I thought was really clever, but I have yet to get it to work quite right. So it's back to the paired screws Capital Plastics used. I've managed to get a few to experiment with by cannibalizing old holders, but where can I buy a box of 100? The thing with magnets involved cutting holes at the corners of the cover plates, just a little larger than the diameter of some rare-earth magnets that I bought, then putting some two-part epoxy in those holes, and pressing the magnets in. The idea was that the epoxy would fill the gap between magnet and acrylic, harden, and bond to the plastic, holding the magnets firmly in place. Then the magnets would attract each other through the center layer, holding the covers on. Unfortunately it didn't really harden or bond to the desired extent. I've come to think that casting resin would work better. Edited by publius
Yesterday 1:45 pm
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Moderator
 United States
195545 Posts |
Maybe insert the magnets from the opposite side so that a (not too thin) layer of the original plastic is holding them in place instead of the epoxy. You can probably make a decorative cap to cover the now visible hole so that it looks finished.  |
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Pillar of the Community
 United States
836 Posts |
Quote:
Maybe insert the magnets from the opposite side so that a (not too thin) layer of the original plastic is holding them in place instead of the epoxy. Cutting through-holes with the laser is quick and easy. Removing part of the thickness of the material means burning it away, a time-consuming process which produces a lot of smoke and fumes, and can be difficult to get right. |
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Pillar of the Community
 United States
8980 Posts |
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Pillar of the Community
United States
6853 Posts |
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Moderator
United States
195545 Posts |
Quote:
Cutting through-holes with the laser is quick and easy. Removing part of the thickness of the material means burning it away, a time-consuming process which produces a lot of smoke and fumes, and can be difficult to get right. Understood. Quote:
Would this work?  |
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Bedrock of the Community
Canada
21885 Posts |
Keith has the answer to your question.
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Pillar of the Community
United States
836 Posts |
Thanks, Keith67, that sure looks like a good start.
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Pillar of the Community
United States
7321 Posts |
Pending on the total depth of the case, I was thinking a somewhat cheap solution would be auto panel pins...Something like these 316677408752The "spread" of the core could create enough friction to hold...  |
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Moderator
United States
106669 Posts |
I think that Keith's link would work the best.
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Moderator
United States
195545 Posts |
Quote:I was thinking a somewhat cheap solution would be auto panel pins...Something like these 316677408752 An interesting solution, I mus say.  |
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Pillar of the Community
United States
836 Posts |
Quote:
Pending on the total depth of the case, I was thinking a somewhat cheap solution would be auto panel pins... I do have some of these. They are kind of clunky, though, for lack of a better term. The "Chicago screws" used by Capital are pretty unobtrusive. |
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Pillar of the Community
United States
836 Posts |
Here, by the way, is a prototype coin-holder I was working on last night. This one seems to hold itself together all right by pressure and friction, although a final version might want some glue. It is a coin display, not because it needs to be one, but because that's what I tend to make by default. I call it "the logical inverse of a fidget toy", but really it is a placeholder. More specifically, it is meant to be a solution to one of life's minor annoyances, the tendency of buffet attendants to clear away your place when you get up to grab another drink, or something you had forgotten. This is meant as an obvious "I am coming back" signal.  |
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Moderator
United States
195545 Posts |
Very interesting! |
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Replies: 13 / Views: 285 |
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Posted Yesterday 1:48 pm
