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Drew Diller
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Funny, your words on the "claiming its NEW" end of things... I was involved in helping prototype someone's invention 10 years ago, and it is just now seeing fruition now that the patent has expired, and I won't ever see a penny. I think certain types of marketing people get reincarnated as dung beetles. Oh well, it was/is a good product. It'll help people. I'll send you a message soon - and to anyone else as soon as I succeed with a bladder sans a specialized factory (have you seen what goes into large latex dip outfits, yikes), I'll post up about it.
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compositepro
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Drew Diller (14/07/2013)
No I don't go on velocipede - first I'd heard of it actually. I can give you a quick background on myself - when still in essentially unconfident teenager mode I flunked out of college twice, once software engineering then mechanical engineering. I fell into software engineering for a living and ten years later I want to do mechanical engineering, lol. Whoooooops. I think if you mistook me for an employee I must be on the right track? I hope so. My most pressing hangup right now is making a tough, leak free, reusable bladder. I have the mold creation end of things more or less covered. I get prepreg at what appears to be a very fair price straight from Zoltek. The consolidation and compression bit is what I don't have down yet. (Is it just me or do the QUOTE tags on this forum not work intuitively?) Hi Drew I was wondering as Argonaut actually use a company called ICE for all their carbon knowledge,was wondering if they were moving away from them as there are a lot more folks asking questions online now regards Bladder molding and seeming not to have got as far as you have. I actually worked in the USA many years ago in the bicycle industry, back when composites were in their infancy ,but moved away from it when i got involved with a guy who was working for a big military aeroplane company in Burbank Turns out he got me a job back in good old England as he was quite high up in the F1 teams as far as composites engineering went and we kind of went from there, spending time in F1 Defence you kind of develop things which companies outside those industries then patent claiming its NEW but again the birth of my daughter has brought a career change hence we set up a bicycle consultancy and manufacturing company in the UK If you get stuck for anything drop me aline chief
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fgayford
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Hello
Well you have knowledge that we would all like to learn from.
Could you post some pictures and some how to descriptions?
I would really appreciate this. There is painfully little on the web on this technic.
Thanks again
Fred
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Drew Diller
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Group: Forum Members
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No I don't go on velocipede - first I'd heard of it actually. I can give you a quick background on myself - when still in essentially unconfident teenager mode I flunked out of college twice, once software engineering then mechanical engineering. I fell into software engineering for a living and ten years later I want to do mechanical engineering, lol. Whoooooops. I think if you mistook me for an employee I must be on the right track? I hope so. My most pressing hangup right now is making a tough, leak free, reusable bladder. I have the mold creation end of things more or less covered. I get prepreg at what appears to be a very fair price straight from Zoltek. The consolidation and compression bit is what I don't have down yet. (Is it just me or do the QUOTE tags on this forum not work intuitively?)
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compositepro
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Drew Diller (14/07/2013)
"Ps your not the guy who's experimenting at argonaut?" Hey, thanks for the advice compositepro! I will do the tapering advice ASAP because I need to enlarge my mold's inflation neck anyway. No I don't work for Argonaut - I sent them an email the other day actually, small world, haha. Ah Ok i watch argonaut with interest ,its interesting to i see them learning the processes as they go along ,its been fascinating to watch the smaller guys ask the questions then implement their interpretation of them, i wondered if you were an employee I have cad files of several big box frames that show this and in the past few weeks have had a fair few folks ask how they do the bladders and air inlets do you go on velocipede salon at all?
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Drew Diller
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Group: Forum Members
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"Ps your not the guy who's experimenting at argonaut?" Hey, thanks for the advice compositepro! I will do the tapering advice ASAP because I need to enlarge my mold's inflation neck anyway. No I don't work for Argonaut - I sent them an email the other day actually, small world, haha.
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compositepro
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drew thats the process we use in industry, i work in design of composite bicycles in fact 20 years ago we pretty much invented it only using eutectic alloys inside the bladder we would melt out at 70 degrees if it is expanded polystyrene you dont need to melt it out it will become a quite gasseous state at cure temp (we are upwards of 200 deg) Latex will work but PU is far more effective 60psi - double it. also consider tapered sections where your neck meets the tube profile it wont tear out and replicate that feature in your mould its lower stress on any bladder you put in there Ps your not the guy who's experimenting at argonaut?
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Drew Diller
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Group: Forum Members
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Well, this silicone bladder test didn't go so well - my result had wall thicknesses that were too difficult to control in certain places. I'm going to test latex and a wax plug this weekend, which isn't relevant to the material in this thread. I'll post elsewhere about it if successful.
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Drew Diller
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Group: Forum Members
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I had some real bonehead moments regarding the inflation neck - it was leaky, or it would tear out, etc. This revision is holding air throughout a 24 hour period - not high pressure mind you, it's not in the mold currently. I hope it behaves just as well when enclosed and with high pressure. Wish me luck... 
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Matthieu Libeert
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