Subject: bellhousing casting plug
From: Rotary Engine
Date: 3/8/2008, 10:57 PM
To: AAA Put this in the To box



> Paul,
>
> Finally getting over this flu. What a nasty bug. The outside
plug for
> the bellhousing just came out of the machine
>
> Inner core going in now. Picture attached of outer plug. Just needs a
> little sanding and polish.
>
> Larry
>
> Thanks Larry. Looking good.
> -- > Paul Lamar ...No rotor no motor.

Larry, what's the mat'l your using there? Is that REN board?

Jarrett  [Look's REALLY good!]

Jarrett,
Not really sure what the plastic is... but it was free, so the price was
right. It is not delrin, but feels more like abs or polypropylene blend.Anyway it's weird stuff with green speckles in it. Seems very tough, so it
should hold up to the casting process well.
Larry

Possibly recycled UHMW? It can come in a dark muddy or yellow color..

So is that the full pattern? Is the interior pocketed out and used as
the mating pattern for the part? [Instead of two patterns?]

Jarrett

Jarrett,
You don't necessarily need a top and bottom( inner and outer) pattern.
Although I can't remember which way Larry is going with this particular
set-up. A singular pattern is all that is needed - from that you can produce
your earth or sand cast, which is in two pieces (inner and outer).
George (down under)


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