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Home >> Die Casting
Sunway-Die Casting
Die casting is an efficient, economical process for producing
engineered metal under high pressure into molds. The molds are called
dies. The dies can make complex shapes with a high degree of accuracy
and repeatability. Die cast part can be made to precise dimensions that
are both strong and durable.
Advantages of different metal alloy in die
casting
- Aluminum is usually Die Cast at 650＜ C and can be alloyed with silicon
and copper. Aluminum has good corrosion resistance and mechanical
characteristic while silicon increases the melt fluidity and copper
increases hardness and reduces ductility.
- Zinc is economical for small parts. It is the best alloy to cast and
has a lower melting point, 450＜C, so the cooling time. Together with the
fact that Zinc can be run using a hot chamber process allowing for a
fast fill and fast cooling
- Copper has high hardness, high corrosion resistance with the best
mechanical properties. Copper alloys are normally used in plumbing,
electrical and marine applications where corrosion resistance are
important.
- Magnesium is the lightest alloy in common use.
Advantages of die casting
- Compare with sand casting: die casting require little or no machining
to meet specifications. It can rapidly produce high volumes of parts
without needing to replace the tool and results in excellent surface
finish.
- Comparison with investment casting: Investment casting is a
high-precision process that employs alloys with properties similar to
foundry alloys. Tooling cost is substantially lower than for die
casting, but production costs are higher. Investment casting is
competitive with die casting only at very low production volumes.
- Comparison with permanent mold castings: Die casting can be made close
to dimension specification with thinner wall and holes, can be produced
in high rates with less manual labor and less cost per part. Permanent
mold casting, however, involves somewhat lower tooling costs and can be
made with sand cores yielding shapes not available in die casting.
- Compare with Stamping: If a highly complex stamping or several
stampings are required, die casting can be a cost-effective alternative,
and can achieve complex shapes which are impossible with stamping. The
extra cost for stamping such as fixturing and welding add to the costs
of the part, can make die casting very competitive.
What Sunway can do for you?
Sunway die casting services focus on parts for office automation,
medical and automotive industries. If you have medium to high volumes of
parts from aluminum, zinc, magnesium then it is well worth the
investment. Benefits including electro-magnetic shielding, hardness,
thin wall thickness construction (minimum 0.5mm).
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