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Old 10-12-2023, 03:44 PM
steve.murphy steve.murphy is offline
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Default Making aluminium motorcycle gas tanks

https://youtu.be/8hVdC9ScUx0?si=GUlRvWtaPzm0MtHU
The company in this video has been making many fuel tanks since the early seventies. At about 19:50 minutes, they show a pressing operation.
The actual pressing mold looks like it is made from some type of epoxy and other bits and pieces.
Wondering if anyone is familiar with this method and what they used to make their tooling from.
I liked the shop too, seemed very traditional.
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Old 10-12-2023, 05:13 PM
Marc Bourget Marc Bourget is offline
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I'll defer to the "pros" but there are lots of possibilities


Have you considered Kent White's flow-forming technique?


I'd consider making the female molds in concrete and covering the contact ares in epoxy or a hard urethane.


Prototype production might use Kirksite and lead.
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Old 10-12-2023, 08:07 PM
steve.murphy steve.murphy is offline
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I have seen some nice examples of flow forming done on a few different posts. I was just a little surprised how basic these press molds were and they seem to have stood up fairly well to repeated usage. I think I even spied a wood block buried in the resin on the bottom side of the mild.The press they used looked like it could generate some force too. The owners said the founder made about 20000 tanks over the years before they took it over.
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