When
I started manufacturing the Country Living Grain Mill we used a cast
iron plate made from sand castings. They worked, but there was not
enough control over every aspect of the grinding plate. So recently we
decided to spend thousands of dollars more on an injection die that
would allow us to create individual wax patterns for each set of
plates. For many centuries, artisans of fine (and very expensive)
sculptings have used this "Lost Wax" process for reproducing their
masterpieces.
This state of the art "investment" casting method is so
accurate that it could reproduce even a fingerprint if necessary. So,
just like the great sculptors who have captured their timeless and
priceless creations in metal over the centuries, each set of Country
Living high-carbon steel grinding plates is formed using a refined
version of the ancient time-proven lost wax process.
Each plate has its own wax model which is coated with a
colloidal silica slurry. Then, it's put into an autoclave (an oven
using both heat and pressure). This, of course, melts the wax (Lost
Wax) leaving only the shell. This shell, because of the heat and
pressure, turns it into an extra ordinarily tough monolithic
structure.
Finally, 3,000 degree molten high-carbon steel is poured
into the shells. Once cooled and hardened, the plates must be machined
to assure complete flatness. No other grinding plates in the world go
through more exhaustive processes than the plates for your Country
Living Mill.
Jack Jenkins
Country Living Productions