I'm trying to source a 'heat sink case' for an electronics project. I
want a U section aluminium extrusion, preferably with fins or at least
some ribbing which will hold a PCB 220mm x 123 mm with some spare
space. The devices needing to be fixed to the heatsink/case are down
the two long sides of the PCB. Depth required is around 40mm.

I can find quite a few tubular extruded cases which might be the right
size but I need U section to allow me access to connect up etc. in
situ. (That's a U with one 'wide' side open)

Can anyone suggest where I might find something like this, it's just a
one off.

--
Chris Green

wrote:
I'm trying to source a 'heat sink case' for an electronics project. I
want a U section aluminium extrusion, preferably with fins or at least
some ribbing which will hold a PCB 220mm x 123 mm with some spare
space. The devices needing to be fixed to the heatsink/case are down
the two long sides of the PCB. Depth required is around 40mm.

I can find quite a few tubular extruded cases which might be the right
size but I need U section to allow me access to connect up etc. in
situ. (That's a U with one 'wide' side open)

Can anyone suggest where I might find something like this, it's just a
one off.

I have usually found it easier to do such things with a plain case with
heatsink stuff bolted to it.

The trouble is that there are so many specially made things for mass
production - tooling an extrusion is not expensive in 1000 up quantities
- but very little for 'home consumption'

What is the environment and worst case heat dissipation?

A possible solution may be to hit a car scrapyard of you can find one
and see if there is a suitable bit of engine electronics whose case you
can pirate.

Another possibility its a Mini IX computer case. Thsee may come with
fans and you can certainly get them, with plemty of ventilation to take
board mounted heatsinks.



--
Ineptocracy

(in-ep-toc-ra-cy) €“ a system of government where the least capable to
lead are elected by the least capable of producing, and where the
members of society least likely to sustain themselves or succeed, are
rewarded with goods and services paid for by the confiscated wealth of a
diminishing number of producers.

On Fri, 28 Sep 2012 13:30:38 +0100, The Natural Philosopher wrote:

I have usually found it easier to do such things with a plain case with
heatsink stuff bolted to it.

That was my thought as well. Eddystone box and suitable sized bit of
cheap heat sink extrusion bolted on with thermal compound in the gap.
That's always assuming that the box just by itself won't sink enough
heat...

--
Cheers
Dave.

wrote:
I'm trying to source a 'heat sink case' for an electronics project. I
want a U section aluminium extrusion, preferably with fins or at least
some ribbing which will hold a PCB 220mm x 123 mm with some spare
space. The devices needing to be fixed to the heatsink/case are down
the two long sides of the PCB. Depth required is around 40mm.

I can find quite a few tubular extruded cases which might be the right
size but I need U section to allow me access to connect up etc. in
situ. (That's a U with one 'wide' side open)

Can anyone suggest where I might find something like this, it's just a
one off.

I think you might be best looking for a standard box, U shape top and
bottom with front and back panels. Then replace the back panel with a
chunk of marston heatsink extrusion. see farnell for details

size 60DN is getting near to what you want.

hth

Bob

In article ,
wrote:
I'm trying to source a 'heat sink case' for an electronics project. I
want a U section aluminium extrusion, preferably with fins or at least
some ribbing which will hold a PCB 220mm x 123 mm with some spare
space. The devices needing to be fixed to the heatsink/case are down
the two long sides of the PCB. Depth required is around 40mm.

I can find quite a few tubular extruded cases which might be the right
size but I need U section to allow me access to connect up etc. in
situ. (That's a U with one 'wide' side open)

Can anyone suggest where I might find something like this, it's just a
one off.

DigiKey have U section ally cases - MegaSquirt uses one. Not finned,
though. Arm and a leg. You have tried Ebay? Usually called project boxes
on there.

--
*Life is hard; then you nap

Dave Plowman London SW
To e-mail, change noise into sound.

On 28/09/2012 12:29, wrote:
I'm trying to source a 'heat sink case' for an electronics project. I
want a U section aluminium extrusion, preferably with fins or at least
some ribbing which will hold a PCB 220mm x 123 mm with some spare
space. The devices needing to be fixed to the heatsink/case are down
the two long sides of the PCB. Depth required is around 40mm.

I can find quite a few tubular extruded cases which might be the right
size but I need U section to allow me access to connect up etc. in
situ. (That's a U with one 'wide' side open)

Can anyone suggest where I might find something like this, it's just a
one off.

Sounds like you need the case from an old inverter or car audio amplifier.
Look for faulty ones on ebay?

AlanD wrote:
On 28/09/2012 12:29, wrote:
I'm trying to source a 'heat sink case' for an electronics project. I
want a U section aluminium extrusion, preferably with fins or at least
some ribbing which will hold a PCB 220mm x 123 mm with some spare
space. The devices needing to be fixed to the heatsink/case are down
the two long sides of the PCB. Depth required is around 40mm.

I can find quite a few tubular extruded cases which might be the right
size but I need U section to allow me access to connect up etc. in
situ. (That's a U with one 'wide' side open)

Can anyone suggest where I might find something like this, it's just a
one off.

Sounds like you need the case from an old inverter or car audio amplifier.

You have it in one, it's for an inverter (kit coming from China). I
had a broken 1kW inverter that might have been suitable but I threw it
away.


Look for faulty ones on ebay?

That's a possibility, thanks.

--
Chris Green

AlanD wrote:
On 28/09/2012 12:29, wrote:
I'm trying to source a 'heat sink case' for an electronics project. I
want a U section aluminium extrusion, preferably with fins or at least
some ribbing which will hold a PCB 220mm x 123 mm with some spare
space. The devices needing to be fixed to the heatsink/case are down
the two long sides of the PCB. Depth required is around 40mm.

I can find quite a few tubular extruded cases which might be the right
size but I need U section to allow me access to connect up etc. in
situ. (That's a U with one 'wide' side open)

Can anyone suggest where I might find something like this, it's just a
one off.

Sounds like you need the case from an old inverter or car audio amplifier.
Look for faulty ones on ebay?
Buy a bit of 5 bar chequerplate and fold it.

Bill