Download OPERATING INSTRUCTIONS ELECTRONIC LOW

Equation:
Total furnace pressure = basic admission pressure + (n-1)*dp + P8
Furnace pressure with riser control = basic admission pressure + (n-1)*dP
where:
n = number of castings
dP1 = pressure compensation per casting = 1.8 mbar
Basic admission pressure = 50 mbar
All numerical values are exemplary.
In this operating mode, the furnace is not vented completely after the pressure holding time
has lapsed; rather, it is vented when a certain residual pressure level is reached. The metal
can thus be kept at a certain level and the next cast cycle can be started from the same
level.
Advantages:
Disadvantages:
-
Less air consumption.
-
Less oxidation of the metal.
-
Different metal temperatures in the riser and furnace.
-
Danger of overflowing metal when machine is open.
PROCESS:
They process is explained by the above numerical example.
With the parameter "Basic admission pressure", the metal level is determined at which the
metal should be kept constant.
Please note
1 mbar pressure corresponds to about 4 mm metal movement in the
riser (aluminium).
After pressing the button "Metal refilled", the basic admission pressure (50 mbar) is
displayed on the admission pressure display.
The starting point:
Metal refilled, "Metal refilled" button has been pressed, Admission
pressure = 50 mbar, furnace is fully vented.
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