Granted Patent B2

US 7,165,598 · App. 10/950,491 · Granted Jan 23, 2007

Abstract

Claims (17)

1. A method for making a cast product by squeeze casting using an AZ91D alloy, the method comprising:

heating the AZ91D alloy to a liquid state;

filling a shot sleeve with the liquid AZ91D) alloy;

forming a seal between the shot sleeve and a die;

injecting the liquid alloy into the die with an injection unit at a pressure of greater than about 69 Mega Pascal (Mpa) and a gate velocity of less than about 500 millimeters per second (mm/sec); and

solidifying the AZ91D alloy in the die to generate the cast product.

2. The method according to claim 1 , further comprising:

removing the cast product from the die.

3. The method according to claim 1 , wherein forming a seal further comprises:

clamping the shot sleeve in the die with a clamp.

4. The method according to claim 1 , wherein the pressure is between 70 Mpa and 100 Mpa.

5. The method according to claim 1 , wherein the gate velocity is between 100 mm/sec and 500 mm/sec.

6. The method according to claim 5 , wherein the gate velocity is between 300 mm/sec and 500 mm/sec.

7. The method according to claim 1 , further comprising:

applying a heat treatment to the cast product.

8. The method according to claim 7 , wherein the heat treatment is a T4 temper.

9. The method according to claim 7 , wherein the heat treatment is a T6 temper.

Assignments (25)