Low Pressure Diecasting
This is a repetitive process where identical parts are cast by injecting molten metal under low pressure into metal dies. This process requires complex machinery and is similar to high pressure diecasting.
Advantages
- Fair production rates up to 30/Hr
- Thin wall thickness possible (2-3mm)
- Better linear tolerances than gravity casting
- Surface finish improved on gravity casting, but not up to pressure diecasting standards
- High yields possible as runners and risers not required
- Reduced finishing if required
- Pour free castings are obtainable
- Sand cores may still be used to allow complex castings
- Die costs far lower than for pressure diecasting
- Castings are heat treatable
Limitations
- Size of casting limited by machine size
- Production rates not up to pressure diecasting
- Feeding thin sections through thick sections is not recommended casting weight range 5Kg - 25Kg
- Approximate economical quantity range>1000