STEPS IN DIE CASTING

STEPS IN DIE CASTING

1. Close and lock the two halves of a die after coating the mould cavity surfaces with a mould wash, if specified:

2. Inject the molten metal under pressure into the die.

3. Maintain the pressure until metal solidifies.

4. Open die halves.

5. Eject the casting along with runner, riser etc.

6. The above cycle is repeated.

Two pressure die casting methods are used:

1. Hot chamber process: This uses pressures up to 35 MPa and is used for zinc, tin, lead, and their alloys. In this process the chamber, in which molten metal is stored before being pressure injected into the die, is kept heated.

2. Cold chamber process: In this process, pressures as high as 150 MPa are used. The storing chamber is not heated. This process is used mainly for metals and alloys having relatively higher melting point e.g., aluminium, magnesium and their alloys.

Leave a Comment