Which process should be used for leak proof castings?

Aluminium casting processes can be used for providing strong Helium Leak Proof and Water tight parts. There are various processes which if used correctly can produce these parts. The process of Gravity Die Casting (Permanent Mold Casting) if used with correct gating can be a very good cost effective method for producing leak proof castings. Moreover, traditionally Low Pressure Permanent Mold Casting (Low pressure Die Casting) is a process which is employed to produce high strength leak proof parts. Pressure Die Casting parts are not conventionally leak proof – unless of course impeccable gating is used along with remedies for air entrapment are taken care of in the die.

Aluminum Die Casting

Aluminum Die Casting Parts vs Plastic Parts

Aluminum Die Casting Parts vs Plastic Parts

Aluminum Die Casting Parts	Plastic Parts
Aluminium parts are more heat resistant than plastic	Less heat resistant as compared to Aluminium
Requires an iron mould	Requires an iron mould
Expensive tooling as compared to sand	Expensive tooling comparable to Aluminium casting
Has to be colour coated to achieve required colour	Required colour can be achieved from raw material selection
Has substantially higher strength than Plastic	Has lesser strength compared to Aluminium
Near net finish possible	Near net finish possible
Melting is expensive since higher temperature of upto 650-700 deg C required	Depending on material melting temperature varies but is lower than Aluminium
Aluminium is easily recyclable and bio degradable	Plastic is recyclable but not easily biodegradable
Weight of Aluminium (density avg 2700 m^3/kg) is more compared to plastic	Weight of plastic (average density 1500 m^3/kg )is less
Aluminium parts can be threaded or inserts can be provided	Plastic parts can also be threaded but better option is to use inserts