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Old 02-03-17 | 09:18 AM
  #17  
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rhm
multimodal commuter
 
Joined: Nov 2006
Posts: 19,810
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From: NJ, NYC, LI

Bikes: 1940s Fothergill, 1959 Allegro Special, 1963? Claud Butler Olympic Sprint, Lambert 'Clubman', 1974 Fuji "the Ace", 1976 Holdsworth 650b conversion rando bike, 1983 Trek 720 tourer, 1984 Counterpoint Opus II, 1993 Basso Gap, 2010 Downtube 8h, and...

Originally Posted by USAZorro
The end results are outstanding. I, for one, would love to see a bit more about the process involved in creating the stamp/die/etc that resulted in those excellent products (especially the leather and metal badges).

Hmm... well, at the risk of giving away proprietary trade secrets...

I start with a drawing...


and I go to the 3D printing service "Shapeways:"
https://www.shapeways.com/creator/2dto3d#landing

and I upload my drawing. After a few steps I get a preview of the stamps, which might look like this:


I chose a material (in this case, the cheapest plastic). They do various checks of how thick it will be, and... eventually I pay them, they print it, and they send it to me.

I do something similar with the head badge, except it was "printed" in brass or bronze. That actually means they print in castable wax and then turn it into metal by a lost wax casting process. It comes to me flat; I file it as needed, add paint, sand the paint of the high parts, curve it to fit a bicycle, and... that's about it. Please don't tell anyone.

I made [MENTION=381793]gugie[/MENTION] four head badges; two of them are brass, two are bronze. I can't tell the difference, but I believe they will oxidize differently, so in a year or two they should be different colors.
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