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914World.com _ 914World Garage _ 911/914-6 engine content....Al fan shrouds manufacture

Posted by: raynekat Jan 8 2017, 01:47 AM

Saw this on Youtube today.

Pretty cool.

My German's pretty rusty tho....

https://www.youtube.com/watch?v=JMyjV59GITQ

Posted by: bretth Jan 8 2017, 08:23 AM

That's cool. I always wanted to try and sand cast something, relatively inexpensive if machining isn't needed. I wonder what the ping pong balls near the end processes are for.

Posted by: 914Sixer Jan 8 2017, 08:59 AM

Lots of steps to make that part. Good information on how the sand casting process takes place and the machining required. Imagine doing the work with out CNC.

Posted by: mb911 Jan 8 2017, 09:06 AM

I am actually looking at making these out of magnesium locally..

Posted by: tscrihfield Jan 8 2017, 09:08 AM

Very cool, thanks for the share!

Posted by: BillC Jan 8 2017, 11:27 AM

QUOTE(bretth @ Jan 8 2017, 09:23 AM)

I wonder what the ping pong balls near the end processes are for.

They are used to reduce evaporation from the tank, by reducing the exposed surface area of the fluid.

Posted by: porschetub Jan 8 2017, 12:15 PM

Amazing foundry so much automation,interesting to watch,not like the one I worked in many years okay .
The finished product looks heavier in construction than the magnesium one, wonder what to finished weight is ?

Posted by: Perry Kiehl Jan 8 2017, 12:53 PM

I'll bet the fan housing was a Mahle product, and pressure cast

Posted by: raynekat Jan 11 2017, 08:46 PM

Mittelmotor's ad on Ebay.de (Germany)....

http://www.ebay.de/itm/Porsche-911-RSR-ST-906-914-6-GT-Geblasering-generator-fan-housing-/282318199471?hash=item41bb79daaf:g:Wb8AAOSw44BYcQBw

Posted by: jd74914 Jan 12 2017, 07:27 AM

QUOTE(porschetub @ Jan 8 2017, 01:15 PM)

Amazing foundry so much automation,interesting to watch,not like the one I worked in many years okay

That's what I was thinking...much cleaner than any foundry I've been in too! Especially the non-ferrous metal foundries. Maybe I missed it, but I was surprised not to see a heat treating step. Wonder what alloy they are made from?

Posted by: Bartlett 914 Jan 12 2017, 08:42 AM

I think that was a nice video. I worked at a company that cast Cast iron valve guides and Die cast aluminum pistons. This fan was done in a "lost foam" process. The sand formed the outer shape of the fan housing. The white material that got inserted was foam that evaporates when the heated aluminum hit it. The white foam is the fan housing. I was in a forum where guys were making jewelry pin from bugs. "Lost bugs". Think about casting a dragon fly in silver this way.