Instruction manual

OPERATING_MANUAL_MC20V.DOC 18.03.11 KS Seite 23
On this main sprue single pieces are fixed in a style of a spiral. This is best for cutting
off the casting pieces after casting process.
On MC20V this tree is more a bush, pieces are fixed on the button cone directly.
Only a short piece of main sprue is required.
This main sprue is fixed in the rubber base, the diameter of the rubber base is
according to the diameter of the flask.
Some hints:
Make sprues as short as possible
Diameter of sprues should be big enough to guarantee optimal feeding of the
castings with liquid metal.
Place wax pieces so that wax can flow out easily
Not good
good
The connection of the waxes to the sprue should be done in a hydro-dynamic
style, to prevent turbulences while pouring liquid metal.
Liquid metal is heavy in weight, it
can break away thin parts of the
gypsum. Create all connections in
hydro-dynamic proper style.
Do not place waxes/plastic parts to close to flask cylinder. There should be a
distance of at least 5 mm