The equipments used to produce iron castings in China
Many clients visited our
Dandong Foundry each month, and we
need to introduce the equipments to produce
iron castings. So, I want
to write an article to introduce these equipments, and hope it could
be helpful for buyers to learn about these equipments in China.
1. molding equipments
A) manual molding
Most of iron foundries in
China could produce the iron castings by manual molding method. In
brief, workers make the sand molds only by their hands and sand
boxes, without any other equipments. This method is very traditional
but still being used widely in China.
B) molding machines
Some iron foundries use molding machines to make the sand molds. The
molding machines could make the sand molds by air pressure as the
motive power, so it is a kind of semi-automatic molding method.
C) automatic molding machines
Automatic molding machines are also called
automatic molding lines
since they are a whole set of production line, which has very high
production rate and use less workers.
D) shell molding equipments
Shell molding process need
the core shooters, which are kind of machines used to heat the resin
sand and shoot the sand into the metal molds.
2. melting equipments
Cupola is a kind of traditional furnace, which uses the coal as the
heating material. Cupola is old and has higher pollution, and can
not produce high grades of cast iron. Although most of iron
foundries in China are still using cupolas, but they are being
replaced by medium frequency furnace.
B) medium frequency furnace
Electric furnaces are
widely used in China foundries, they can usually produce 500 kg, 1
ton, 1.5 tons and 2.5 tons liquid iron in each furnace.
3. cleaning equipments
A) shot blasting machine
Shot blasting machines use the high speed small steel balls to clean
the sand residuals on the surfaces of iron castings. There are chain
shot blasting machine, hanger shot blasting machine, barrel-type
The angle grinders, electric grinders and grinding wheel machines
are used to clean and grind the surfaces of iron castings after shot
4. Painting equipments
After cleaning, the rough castings need to be painted by anti-rust
paintings, so the iron foundries in China usually have their own
painting workshop. Of course, most of them just could paint the
normal and simple painting.
5. Machining equipments
Some large iron foundries in China could do the finish machining
in-house, but some small iron foundries just could do the rough
machining, and have to entrust professional
to do the high accuracy finish machining.
6. Inspection devices
Most foundries have normal
for the physical and chemical properties, and some large foundries
have CMM and
for magnetic powder inspection,
and impact test, they usually need to entrust professional testing