Green Sand Casting Process
Green sand casting process is a kind of
casting production method, which uses
as the molding material. Green sand is a kind of wet quartz sand.
Except of green sand, this process need to use the cupola or
medium frequency furnace.
As for the molding equipments, some iron foundries use the molding
machines, automatic molding
lines, or just use
manual molding method.
Green sand casting process is suitable to produce various
cast iron grades. Such as
grey iron from ISO100 to
ISO350, ductile iron from
ISO400-18 to ISO900-2. Moreover, this process is also suitable to
produce some simple aluminum castings. However, it is not suitable
to produce steel castings
since steel castings need larger air permeability.
Green sand casting process is suitable to produce the iron castings
with low dimensional requirements, low surface smoothness
requirements, simple inside structures, not too thin wall thickness,
low casting defects
The advantages of green sand casting process are low material cost,
low production cost, low technical requirements, low equipment
requirements, large weight range for iron castings, high production
The disadvantages of green sand casting process are high manpower
cost (except of automatic molding lines), powder pollution, more
casting defects, bad dimensional tolerance, higher defective index,
In the future, the green sand casting process can be used widely for
the automatic molding lines and molding machines, but for the manual
molding method, it will be replaced by
shell molding process since the manpower costs are
increasing in China.
The followings are the photos of automatic molding line and manual
green sand molding line from
Dandong Foundry in