molding is a traditional sand molding
process. Floor molding means we make the
sand castings on floor or ground by sand
deference from other casting method is
we use green sand or
resin sand, and
mold by manual, not by
It is a kind of old and traditional
molding method, but is still widely used
in China and worldwide.
As we know,
floor molding uses sand as the molding
material, which has low cost, easy mold
manufacturing, suitable for small
production volume and mass production.
floor molding has been the basic
technology of casting production.
molding has existed for many years, and
usually uses green sand and resin sand
as the molding materials.
commonly used casting sand is
sand. Silica sand can not meet the basic
requirements of temperature. Chromites
sand and other special corundum sand
will be used for special temperature
requirements. In order to make the sand
mold and core with a certain intensity,
casting foundries usually add sand
binder, in this way, loose sand will
bond together to form the molding sand.
Sand binder most widely used is clay,
may also have a variety of drying oil or
semi-dry oil, water-soluble silicates or
phosphates, and various synthetic resin
for molding sand binder. According to
the difference of sand binders, molding
sand can be classified into the wet clay
sand, or called
green sand, dry clay
sand and chemical hardening sand.
foundries use different sands, the
molding is still called
In China, we usually call it as
green sand molding, but in
western countries, it is still called