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Mill Engine

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doubleboost:
Took Rob Wilsons advice and split the patern the other way. :thumbup: :thumbup: :thumbup:
This also gave the opertunity to add the exhaust port flange and cylinder drains.
After much sanding and filling the finished patern
Hopefully this will be cast this week  :) :) :) :) :)

Rob.Wilson:
 :clap: :clap: :thumbup: Looking great john


Rob

doubleboost:
Today the plan was to turn the nice red patterns into bronze
I have been looking forward to this all week
Yesterday i baked the cores and rammed up the moulds
These were carefully assembled ready to cast today
Extended risers were used to make sure the mould would fill completly


Rob Wilson called in to oversee the pour

Cylinder we cast last time ready to melt
Fired up the furnace soon had a nice crucible of liquid bronze
The pour went ok but i seemed to be short on metal
The pattern is biger than last time



Not looking to bad



Not enough metal
On closer inspection the core had collapsed

Rob examined the miserable looking casting his verdict

The damp casting sand had softend the core ccausing it to break up during the pour
Wont be making up any more moulds the night before
Going to cast it in aluminium tomorrow nite just to make sure the crucible holds enough metal
If it was easy every one would be doing it

Bogstandard:
John,


--- Quote ---If it was easy every one would be doing it
--- End quote ---

And most probably walking on water as well. :med:

I find you learn more from making mistakes than doing it right first time, and thanks for showing that we all have problems sometimes.

I'm sure you will have a Cheshire Cat grin soon. :D


John

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