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Need your wisdom guys...
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Topic: Need your wisdom guys... (Read 565 times)
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oldschoolace
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Need your wisdom guys...
«
on:
January 26, 2012, 02:54 PM »
Does anyone know a place that can do aluminium sand casting at reasonable rates? Got a little project i'm working on and i'm just plucking companies off the net. Usually when i do this i end up paying over the odds. I need friend of a friend prices
Cheers all
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Sixteen thirty-two. What is that? A year? No, it's your top score on Pole Position.
Peter J
BMX Nerd
Posts: 4993
I have issues
Rated:
Re: Need your wisdom guys...
«
Reply #1 on:
January 26, 2012, 06:15 PM »
What do you need doing ?
I may two a man or two
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I might actually build a bike this year instead of just hoarding parts
oldschoolace
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Re: Need your wisdom guys...
«
Reply #2 on:
January 26, 2012, 07:43 PM »
Its pretty much a case of getting something cast in sand from a plastic original. One is about half the size of a mobile phone and the other is about the size of a bmx wheel
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Sixteen thirty-two. What is that? A year? No, it's your top score on Pole Position.
Peter J
BMX Nerd
Posts: 4993
I have issues
Rated:
Re: Need your wisdom guys...
«
Reply #3 on:
January 26, 2012, 07:49 PM »
You know that the casting will be slightly smaller than the original ?
Where are you based ?
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I might actually build a bike this year instead of just hoarding parts
oldschoolace
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Posts: 6821
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Re: Need your wisdom guys...
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Reply #4 on:
January 26, 2012, 08:01 PM »
Yeah 1/77 by all accounts
im in Manchester.
The Larger casting can take that sort of tolerance and i will just make the smaller plastic piece a fraction bigger. If it helps i have worked out the larger one will have a weight of around 2.7kg
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Sixteen thirty-two. What is that? A year? No, it's your top score on Pole Position.
Peter J
BMX Nerd
Posts: 4993
I have issues
Rated:
Re: Need your wisdom guys...
«
Reply #5 on:
January 26, 2012, 08:18 PM »
Prob the best place I'd say would be:
http://www.arrowbutlercastings.co.uk/
Lad who run's it called Steve Butler it was his Dad's firm and he's fooookin amazing with anything cast non-ferrous
The price he'll give you will be fair
Another one is
http://www.brassfounders.com/
The guy who (I think) who still runs it is Barrie McCabe again amazing quality but might be a bit more expensive, Barrie is one of the best non-ferrous foundry men I've ever known he's forgot more than most people know
One other thing I'd say is just be aware that the finishers in a foundry are not the best...there paid to be fast, not precise
so make sure you make them aware because they'll linish the bloody hell out of it
I'd just ask them to cut the feeds off and finish it myself to be safe
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I might actually build a bike this year instead of just hoarding parts
oldschoolace
Team Moderator
Double Flip Whip
Posts: 6821
Bodger
Rated:
Re: Need your wisdom guys...
«
Reply #6 on:
January 26, 2012, 08:23 PM »
Nice one fella i will give them a try
If this crazy product idea of mine comes off you are in line for a couple of free ones
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Sixteen thirty-two. What is that? A year? No, it's your top score on Pole Position.
Peter J
BMX Nerd
Posts: 4993
I have issues
Rated:
Re: Need your wisdom guys...
«
Reply #7 on:
January 26, 2012, 08:29 PM »
Also know a couple of good Pattern makers if ya need em
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I might actually build a bike this year instead of just hoarding parts
oldschoolace
Team Moderator
Double Flip Whip
Posts: 6821
Bodger
Rated:
Re: Need your wisdom guys...
«
Reply #8 on:
January 26, 2012, 08:41 PM »
Nice one i will bare that in mind
Its been a long term project ( a year or two ) that i keep dicking about with when i get a moment. At the stage now where i need a few prototypes to try and break and work out whether i should get stuff die cast or cnc'd
If it was timber i would be laughing but metals are a whole new world top me. I'm a quick learner though
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Sixteen thirty-two. What is that? A year? No, it's your top score on Pole Position.
Peter J
BMX Nerd
Posts: 4993
I have issues
Rated:
Re: Need your wisdom guys...
«
Reply #9 on:
January 26, 2012, 08:57 PM »
The casting will be a rough finish
There is another option and that’s to get a digital prototype get a local engineering firm who has Inventor or Solidworks to generate a 3D CAD model
Both these had a basic FEA (finite element analysis) package they that can test the strength, deflection etc etc.
It would be cheaper that a casting and you may get a surprise at the results.
If I had a half decent PC I could have done it for you
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I might actually build a bike this year instead of just hoarding parts
oldschoolace
Team Moderator
Double Flip Whip
Posts: 6821
Bodger
Rated:
Re: Need your wisdom guys...
«
Reply #10 on:
January 26, 2012, 09:05 PM »
I have access to a load of cool machinery for free like a 3d printer, small scale cnc milling, laser cutting etc so i will probably use these to knock up a few prototypes. Its what to do with them when i'm happy with them that i need to look into. It may be a case of casting a base model then milling small areas which need a better tolerance?
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Sixteen thirty-two. What is that? A year? No, it's your top score on Pole Position.
Peter J
BMX Nerd
Posts: 4993
I have issues
Rated:
Re: Need your wisdom guys...
«
Reply #11 on:
January 26, 2012, 09:10 PM »
Good luck fella
Sounds like you've got a good start
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I might actually build a bike this year instead of just hoarding parts
oldschoolace
Team Moderator
Double Flip Whip
Posts: 6821
Bodger
Rated:
Re: Need your wisdom guys...
«
Reply #12 on:
January 26, 2012, 09:16 PM »
Cheers for listening to a dumb layman, very much appreciated
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Sixteen thirty-two. What is that? A year? No, it's your top score on Pole Position.
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