Should We Just Make Our Own Heat-Sinks Too? 2 Videos That Make Me Say YES!

Normally I wouldn't start a thread for something like this but I did want peeps to see these vids. Guy makes it look easier than all that math some of y'all do . Seriously though there's a lot of potential to save bank on DIY costs. Just need a cheap mold that has a nice flat bottom since I would think a little polishing will be involved and a weight acceptable to cool whatever COB one wants to cool.

Foundry:
https://www.youtube.com/embed/hHD10DjxM1g?feature=player_detailpage

AL Blanks:
https://www.youtube.com/embed/lSoWxG30rb0?feature=player_detailpage

See how he made a sword? You could make reflectors that way. Put those thieves at Ledil out of business ! LOL

Foundry:

Blanks:

Unfortunately Fran ,casted aluminium is more like a "sponge " ..
It is full of bubbles. (trapped atmospheric air ,Hydrogen and other gases ),thus having poor thermal exchange properties .
Casting melted aluminium ,is not the way to make heatsinks ...
Nevertheless ,those vids are pretty interesting ...

https://books.google.gr/books?id=Wbwv3nt1gp0C&pg=PA644&lpg=PA644&dq=molten aluminum and atmospheric gas&source=bl&ots=HuP7D8azyO&sig=2AjgR3eDDFP888ZKyZJOoTd-HFM&hl=en&sa=X&ved=0CCsQ6AEwAmoVChMI4q-t4reDxwIVQaksCh2dSw5E#v=onepage&q=molten aluminum and atmospheric gas&f=false


http://www.substech.com/dokuwiki/doku.php?id=degassing_treatment_of_molten_aluminum_alloys

http://www.alspecialtygases.com/Ind_molten_aluminum.aspx

Cheers.

Hi SDS, hope you and yours are doing well. How's the Greek Pea business ?

Anyway to refine that technique for our purposes? Something tells me no because I have a feeling it would take too long and be too costly ultimately.

Or maybe for little LEDs ?

I prefer pie dishes.....FUN FACT: They also double as reflectorz..... (GASP!)

Chronikool said:

I prefer pie dishes.....FUN FACT: They also double as reflectorz..... (GASP!)

Click to expand...

Make sure that you bake a pie first to get maximum usage out of your pie pan.

LEDs on the brain... couple months ago I found there was a thing called casting an ant hill. I thought to myself, I bet those would make great heat sinks.

Interesting.

Heatsinks are also of an aluminium alloy, I'm sure that comes into play for solidity, and probably thermal conductivity too.

How about making homemade reflectors ? You could try buying just 1 angelina and replicate