Large Cast Iron Castings
Large cast iron castings mean the casting
parts with unit weight higher than 500 kgs or larger than 1 meter.
Because large iron castings
have more weight, so will require sand molds to have higher
strength. Therefore, most of iron foundries will produce them by
resin sand casting process.
Since the resin sand mold is a type of hard mold, so this process
could produce iron castings with unit weight max. 2 tons, and could
guarantee the large castings to have the following characters:
1. Better surface quality, the rough surfaces will be better than
green sand castings.
2. Less casting defects,
such as sand inclusion, air holes, shrinkage, drop sand, sand wash
etc.
3. Higher rough casting dimensional tolerance grade, normally could
reach ISO 8062 CT10.
The followings are some large iron castings produced by our foundry
in China.
These cast iron plates have unit weight
from 200 kgs to 500 kgs. Their dimensions are from 900 mm to 1500
mm. The top and bottom surfaces need to be grinded. The casting
defects requirements are very high. No defects on the surfaces and
inside areas.
These large belt pulleys have been
exported to Germany. Their unit weight from 800 kgs to 1200 kgs. The
outside diameter has exceeded 1.2 meters. Required no defects in the
center axle positions, and tiny defects allowable in the outside
groove positions. Our foundry produced rough castings and done the
machining works in-house.
Our foundry does not have minimum order
quantity limitation, so even our clients just demand several pieces
of large castings, we also like to produce. The following large
bracket and capstan head were exported to New Zealand.
We also produced many large alloy cast
iron castings for boiler manufacturers. These ash collector tubes
were also produced by resin sand casting process. Their wall
thickness is only 10 mm, but its height has exceeded 800 mm.
Moreover, our
iron foundry is also
producing various large cast iron crane balls and ductile iron
manhole covers for our client in USA. The crane balls could be used
for wharf cranes or wrecking cranes.
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