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pankajp
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Join Date: Jan 2011
Location: India, Gujarat, Rajkot
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Aluminium Extrusion

01/23/2013 3:13 AM

i am not succeess in extrusion of solid round bar of boron/aluminim,

i use regular shape die or conical both die i use for, but the surface finish is not ok it very ruf finish,

tempture and pressure is ok but i request u pls any

one have idea about the die shape so i request to suggest me

-------pankaj

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Doorman
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#1

Re: Aluminium Extrusion

01/23/2013 9:39 AM

We need a lot more information to help you.

Surface cracking is often due to speed being too high, or temperature too low.

Rod sizes, process involved, lubrication... please tell us more

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pankajp
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#2
In reply to #1

Re: Aluminium Extrusion

01/24/2013 12:55 AM

Thankyou very much......

material is AL3B (Aluminium 97% + Boron 2.5 to 3%)

extrusion speed is 5 to 9 mm

temp is 400 to 420 degree celcius

billet size 85mm

road size 45mm

container length 17 Inch

Die which i use is one conical type the other is bearing type 5 & 25 mm

ok thanks again

----- pankaj
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JesseConant
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#3

Re: Aluminium Extrusion

01/24/2013 1:31 AM

The process of aluminum die-casting is a proper solution to get complicated heatsinks in shape. Compared to aluminum extrusion, for special shaped heatsinks, aluminum die-casting could save much cost of further machining. Thus, aluminum die-casting is widely applied in notebook chipset cooling and industrial cooling. Normally, the material used for aluminum die-casting is ADC12, whose coefficient of thermal conductivity is 96W/mK and just half of that of aluminum extrusion. Another disadvantage of aluminum die-casting is high tooling cost input.

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pankajp
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#4
In reply to #3

Re: Aluminium Extrusion

01/24/2013 5:14 AM

Yes Thankyou....
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Doorman
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#5
In reply to #3

Re: Aluminium Extrusion

01/24/2013 9:24 AM

Here Jesse, I'll credit your comment for you. We generally consider it bad manners to not do so.

I don't believe the casting and extrusion processes can be directly crossed in this circumstance.

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pankajp
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#6
In reply to #5

Re: Aluminium Extrusion

01/24/2013 11:55 PM

Hello Doorman,

i have extrusion plant, so i want to do this process in my plant, not casting

u can see more detail i post is it ok ? or tell me if u want to know more,

pls give me some suggestion in extrusion process, die design or any thing

-------- pankaj
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Doorman
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#7
In reply to #6

Re: Aluminium Extrusion

01/25/2013 10:36 AM

I would first ask about your material selection:

I believe your Al3B is giving you the trouble, the alloy better suited to casting. Was this selected by a material engineer?

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pankajp
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#8
In reply to #7

Re: Aluminium Extrusion

01/26/2013 6:12 AM

material is ok, that is given by my clint, pls give me advice about die design or somthing more
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pankajp
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#9
In reply to #8

Re: Aluminium Extrusion

01/28/2013 10:45 PM
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Doorman
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#10
In reply to #8

Re: Aluminium Extrusion

01/29/2013 8:41 AM

The material is inappropriate for extrusion process.

If he gave you a bundle of pig ears, could you make them into silk purses?

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pankajp
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#11
In reply to #10

Re: Aluminium Extrusion

01/31/2013 12:07 AM

ok Doorman... Thankyou.... now i understand
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