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1. Making Metal Pattern
Iron patterns are the necessary tooling for
automatic molding line, so the pattern cost is high
comparatively. The metal patterns are made by CNC
milling machine, so the dimensional tolerance and
surface quality are very good.
2. Automatic Molding
The automatic molding line can perform the molding
process automatically, only need one worker to
operate the machine.
3. Melting Iron
During molding, the electrical furnaces will start
to melt the irons. The raw materials for ductile
iron and grey iron include pig iron, scrap returns,
and alloy agents. Dandong Foundy has four 1.5 tons
furnaces.
4. Inoculation Treatment (Nodulizing)
After melting, the workers will move the large
pouring ladle to the ductile iron inoculation
treatment station. After automatic nodulizing, the
raw iron will become ductile iron. Dandong Foundry
uses this station to guarantee the stable
inoculation quality. The traditional inoculation
method can not reach high nodulizing quality.
5. Pouring
After nodulizing treatment, the workers will pour
the liquid iron in the large pouring ladle into
small pouring ladles. Then, each worker takes one
small ladle to pour into the sand molds.
6. Sand Blasting and Grinding
When the castings removed out of sand molds, the
iron castings will be cleaned by sand blasting
equipments. Then, the workers will grind the gating
heads, and parting lines.
7. Machining
After cleaning and grinding, the castings will be
taken to the machining workshop. The workers will
machine them according to the machining drawings and
requirements. Dandong Foundry can complete the rough
and finish machining works in-house.
8. Machined Casting Parts
After machining, the casting parts will be
completed. Then, they will be inspected and packed
for delivery and shipment.
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