The Characteristics of Green Sand Casting
Green sand casting is one of the most
convenient casting methods, which is widely used in foundry
industry. This article is intended to introduce the characteristics
of green sand casting.
The basic characteristic of green sand casting is that the sand
moulds (cores) need no drying or hardening process.
The main advantages of green sand casting are as follows:
1. Flexible production, high productivity, short production cycle,
easy to organize continuous production and implement the production
process of mechanization and automation;
2. The cost of materials is low;
3. It saves drying equipment, fuel, electricity and workshop
4. The service life of sandbox is extended and so on.
However, the green sand casting may also tend to bring forth some
such as: gravel, scab, rat-tail, sticky sand, blowholes, sand
inclusion, swells and some other problems.
With the development of casting science and technology, people have
a more profound understanding of the principles of interaction
between metal and mold, and we have more effective control on the
With the use of modern sand processing equipment, sand quality to
some extent is guaranteed, and advanced modeling machine makes sand
tight and uniform, and the mold is of high quality, which promote
the expansion of the application areas. Such as in cars, tractors,
diesel and other industries, thin-walled cast iron pieces with the
quality of less than 300 ~ 500kg are already successfully cast by
green sand casting.
There are some modern modeling methods, such as ordinary machine
molding, micro seismic compaction modeling, multi-contact high
pressure molding, injection pressure modeling, impact modeling and
static modeling and so on.
As an important molding method in Dandong Foundry, green sand
casting is widely used and it contributes a lot in foundry industry,
which enjoys a great improvement potential and wider application.