At NovaCast, we offer a wide range of casting process options as each have strengths and weaknesses that make them suited to certain applications and alloy choices. Shell Mould Casting is a metal casting process similar to sand casting, in that molten metal is poured into an expendable sand-based mould. However, in Shell Mould Casting, … Read more
NovaCast specialises in producing high quality gravity die castings at its Melksham foundry. Our Aluminium casting foundry is ideally suited to producing medium-run components from Aluminium and other non-ferrous alloys for applications across a wide range of industries. Gravity Die Casting is a permanent mould casting process that produces very high quality surface finishes with thin walls and cast-in inserts so intricate shapes can be cast rapidly and little subsequent machining is required.
Why use NovaCast Gravity Die Casting?
Gravity die casting delivers many benefits including:
- Excellent dimensional accuracy
- Smooth cast surfaces
- Thinner walls can be cast allowing intricate shapes
- Inserts, such as threads, heating elements and high-strength surfaces can be cast-in
- Secondary machining is reduced or eliminated
- Production rates can be rapid making longer production runs possible
- Tensile strength is higher than with sand casting
- Specialist Aluminiun casting foundry
Gravity Die Casting Process
- A metal die is manufactured, usually in 2 parts, to form a mould.
- The mould is heated and a lubricant is sprayed into it to assist in controlling temperature and in removal of the casting.
- Molten metal is poured into the mould.
- Once solidified, the die is opened and the casting removed either by hand or with the use of pins in automated processes.
- Excess material including the gate, runners, sprues and flash can be removed using a trim die in a power press or by hand.
- Scrap metal is then re-used in the production cycle by re-melting.
Limitations of the process:
There are some disadvantages to this process including:
- The initial tooling cost will be higher than for sand casting
- Longer production runs help to keep unit costs down and make gravity die casting competitive with other processes