2014年10月11日星期六

Die Casting Methods

Hot Chamber High Pressure Die Casting 
The cylinder and piston, used to quickly inject the molten metal into the die under pressure, are immersed in the molten metal. Used for finely detailed, thin castings in zinc and some magnesium alloys.
Cold Chamber High Pressure Die Casting 
The molten metal is poured into the injection cylinder and then quickly injected into the die under pressure. Used for finely detailed thin castings in aluminium, magnesium and brass.
Gravity or Permanent Mould Die Casting 
The molten metal is gently poured into the die cavity under the force of gravity. Used for all alloys, particularly large aluminium castings and those requiring sand cores for complex internal detail, such as automotive cylinder heads.
Low Pressure Die Casting 
Molten metal is introduced into a die from below by means of a low pressure gas applied to the metal in a sealed furnace. Used for high integrity aluminium castings such as automotive wheels.

Squeeze Casting 
Molten metal is introduced very slowly and smoothly into a die where high pressure is maintained until after the casting is solid. Used for high integrity, high strength aluminium castings such as automotive brake callipers.
 

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