Die casting: metal casting manufacturing processes (hot chamber vs. cold chamber)

Die casting is the means used for constraining molten metal into mold pits in high drive. Die casting is quite flexible strategy consequently, is the most considered method for casting a metal widely. This results in a more standardised element, typically fine dimensional precision and also first-rate surface area finishing.  The diverse metals and composites that can be used in this casting which could be zinc, aluminium, copper, magnesium, tin and lead. Ferrous metals can likewise be used for die casting. Generally die casting method is used for applications where a great amount is average or little sized parts are necessary with specification, good measurement and well surface finish.

Die casting methods:

Cold Chamber process: In this process of cyclical die casting, a cold chamber of each module is overflowed with molten metal and very ideal for metals like zinc, lead, aluminium (high melting point), brass, copper and metals that easily alloy with iron at high temperatures. The time exposure provided for the molten metal to plunge the walls of the mold is less.

Hot Chamber process(for high volume components): Here, the pressure that is associated to the die cavity is perpetual and eternal in molten metal like used for zinc, magnesium and other low melting point alloys. As the plunger moves to the open spot i.e. towards the non-pressurised region, the inlet port joined to the pressurising cylinder/barrel is uncovered.

Preferences of Die Casting: First of all, the method of die casting gives admirable dimensional exactness. Further it provides with even cast surface areas. Thread insert, high strength bearing surfaces and heating elements can also be inserted via this method. Die casting also facilitates in reducing or even wholly removing the utilisation of secondary machining operations. Apart from this, Die Casting method reduces the production time and an enormous series of articles can be formed in a very little period. Lastly, die casting method also helps to hold on to increase the tensile rigidity of the metal.