the_fbi
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| posted on 13/9/06 at 06:14 PM |
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How much for a large lump of aluminium?
I've something in mind which would need machining from a pretty large lump of aluminium.
Anybody know roughly how much a piece 450mm x 300mm x 250mm would cost?
It can be the cheapest type possible.
ta
Chris
[Edited on 13/9/06 by the_fbi]
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tks
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| posted on 13/9/06 at 06:18 PM |
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Goed by weight
Alu is at 7euro Kg??
Tks
The above comments are always meant to be from the above persons perspective.
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JoelP
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| posted on 13/9/06 at 06:20 PM |
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100kgs roughly, assuming .5X.33x.25, and 2.5 tonnes per cubic metre.
maybe $2500 per tonne? So assuing those prices are right, about £150.
need to check prices further though...
source for price :
http://www.lme.co.uk/aluminium.asp
source for specific mass:
http://www.simetric.co.uk/si_metals.htm
[Edited on 13/9/06 by JoelP]
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StevieB
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| posted on 13/9/06 at 06:27 PM |
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Might be a bit more pricey for a block of ali rather than a standard bar or sheet though - might need to be a special cast
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the_fbi
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| posted on 13/9/06 at 06:51 PM |
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Just been thinking, could use nylon or delrin.
Its for a mould for a fibreglass component, so needs to be resistant to all the relevant stuff.
Also easy to machine, which clearly ally/nylon are.
£150 is probably a bit much to make it worthwhile!
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JoelP
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| posted on 13/9/06 at 07:00 PM |
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might sound obvious, but what about a simple block of wood? Would need a good finish and a lot of wax, but technically possible.
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the_fbi
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| posted on 13/9/06 at 07:34 PM |
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quote:
Originally posted by JoelP
might sound obvious, but what about a simple block of wood? Would need a good finish and a lot of wax, but technically possible.
I did consider that, but the ally or delrin will look pretty sexy once I've decided not to bother doing the fibreglass.
Wood would just get chucked on the fire.
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Nick Skidmore
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| posted on 13/9/06 at 08:02 PM |
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10 off 450 x 350 x 25mm thick Sheets of MDF glued together.
I've seen plenty of patterns made out of MDF that way.
Seal and paint with Re-coat for moulding purposes.
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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smart51
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| posted on 13/9/06 at 08:08 PM |
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geting a piece of aly cast is quite cheap if you provide a suitable mould and you are happy to have some of whatever they cast next. you could then
machine up as you would from solid.
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the_fbi
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| posted on 13/9/06 at 09:00 PM |
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I know people use some kind of styrene foam (no idea what its really called) stuff, then create a mould from that as its really easy to work.
I just liked the idea of a machined ally block which could be easily cnc'd to shape and also bolted together for certain areas which have to
mate.
It would also last longer.
I just feel the need to make something useful from fibreglass 
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PAULD
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| posted on 13/9/06 at 09:16 PM |
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what you need is a material called obomodulan. it comes in various grades but the blue would probably be best. you get a good finish straight from the
cnc machine, a little hand finishing and wax and you're there.
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PAULD
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| posted on 13/9/06 at 09:29 PM |
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p.s.
try generalplastics.com
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the_fbi
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| posted on 13/9/06 at 09:32 PM |
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quote:
Originally posted by PAULD
what you need is a material called obomodulan.
I guess if you know words like that you must know what you're talking about!
Thanks, I'll give them a go.
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dmottaway
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| posted on 14/9/06 at 03:28 AM |
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I can get it for you, but shipping from here would be painful.
Just for grins, I will get a price tomorrow.
dave
Somewhere, in Texas, a village is missing its idiot.
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dmottaway
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| posted on 14/9/06 at 11:48 PM |
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gave the general dimension, in American, as 18" x 12" x 10" and was told it would cost roughly $550, plus shipping to you. Readily
available.
And for the totally bizarre, there is a piece big enough to CNC an entire chassis. Approx. 4ft x 8ft x 18".  Probably too big to ship
economically!
I accept PayPal
dave
Somewhere, in Texas, a village is missing its idiot.
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