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| Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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How to Cast Aluminium Heat Sink Fins
I have a read a few books on metal casting but I haven't read any
information of how to cast aluminium heat fins like those found on small air cooled engines. I know for larger air cooled engines the heat fins are machined but believe small engine heat fins are cast. Thanks for any information. Brock |
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#2
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How to Cast Aluminium Heat Sink Fins
On Nov 9, 9:31*pm, durabol wrote:
I have a read a few books on metal casting but I haven't read any information of how to cast aluminium heat fins like those found on small air cooled engines. I know for larger air cooled engines the heat fins are machined but believe small engine heat fins are cast. Thanks for any information. Brock What are you building? TMT |
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#3
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How to Cast Aluminium Heat Sink Fins
durabol wrote:
I have a read a few books on metal casting but I haven't read any information of how to cast aluminium heat fins like those found on small air cooled engines. I know for larger air cooled engines the heat fins are machined but believe small engine heat fins are cast. One-off or production? Production would be die cast. One-off would depend upon what you mean by "small". For a model aircraft engine, lost wax is probably the only feasible technique. For lawn mower engine, sand or lost foam. I tried lost foam for an electronics heat sink & was only moderately successful. Mostly a matter of my low experience level. Bob |
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#4
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How to Cast Aluminium Heat Sink Fins
On Nov 9, 9:16*pm, Too_Many_Tools wrote:
On Nov 9, 9:31*pm, durabol wrote: I have a read a few books on metalcastingbut I haven't read any information of how to cast aluminium heat fins like those found on small air cooled engines. I know for larger air cooled engines the heat fins are machined but believe small engine heat fins are cast. Thanks for any information. Brock What are you building? TMT I first want to cast a rectangular heat sink for an amplifier. This would be an open face plaster casting using a wax model of the heat sink. I have tried this before and had troubles with air bubbles in the plaster and getting the aluminium into the fin slots. I am just doing this for fun as I know it would be better just to buy extruded. Brock |
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