SEMI-SOLID/SQUEEZE CASTING
Molten metal is cooled to about 50% of its liquid temperature forming a special globular structure. The metal is then injected at low velocity into a metal die where it cools to a solid and then ejected. Squeeze casting uses molten metal injected into a metal die and held under high pressure while solidification is in process.
-Several aluminum alloys
-Near net shape, close tolerances
-Capable of zero porosity, very dense grain structure
similar to wrought metals
-Smooth surface finish, typical 32-125 RMS
-Moderate draft requirements
-Ounces to 10 lbs.
-High tooling costs
-Moderate piece price
-Medium to high quantities
-Restrictions to design - undercuts and reverse
angles must be machined
