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Manufacturing:
Metal Casting
Variation
of Green Sand Molding
Tight
Flask Molding
The tight flask
molding process uses a flask (made of metal
or wood) to contain the sand during the
mold producing operation. The flask remains
around the sand during the core setting,
dosing of the mold, pouring and cooling
of the casting. After cooling, castings
and sand are separated from the flasks,
which are then reused to produce more molds.
Advantages
- This method offers more
flexibility in type and number of castings
poured per mold.
- Increased use of the
total flask surface when compared to flaskless
molding.
- Increases the size and
weight of a casting which may be poured.
- Use of complicated cores
or core assemblies is not a problem compared
to flaskless molding.
Disadvantages
- Flask handling systems
require capital investment and a good
maintenance program. The variety and size
of castings produced in a tight flask
molding line may require changing the
flask for a larger size casting.
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