High-pressure Die Casting – Hot Chamber Process Explained

By Author: Ryan
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High pressure die casting hot chamber is a very useful production technology for low melting temperature metals such as magnesium, lead, and zinc. This high-pressure die casting technology provides various advantages to producers, including high productivity, low maintenance, and reduced waste.


Because of its broad material compatibility, the hot chamber die casting method is widely used. Some of its uses include automotive, electronics, and aerospace, to name a few, demonstrating its importance.


What is Hot Chamber Die Casting (HCDC)?


Hot chamber die casting, like all other casting processes, requires a die with a hollow filled with molten metal. After the metal has cooled and solidified, the die opens and ejects the last component, completing the production cycle.


Hot chamber pressure die casting is distinguished by its combined furnace and dies arrangement. Usually, in procedures such as High pressure die casting cold chamber, the furnace is a distinct, stand-alone machine from the die, ensuring ...
... that the tremendous heat does not harm the equipment.


Because hot chamber die casting is a method that only works with low-temperature metals, so the furnace may be placed directly next to the die without causing harm. This is extremely efficient since there is no time spent transferring the molten metal from the furnace to the die. Instead, the injection mechanism directs metal from the furnace into the die.


Components for Hot Chamber Die Casting


Furnace


The most crucial feature of this equipment is its built-in furnace. The furnace contains a combustion chamber that burns fuel and generates high temperatures to melt raw materials. As demonstrated above, in hot chamber casting, the furnace is near to the die.


Gooseneck


This is a necessary component that is specific to hot chamber casting installations. The gooseneck connects the injection mechanism to the feed line, which transports the molten metal into the die. It's submerged in the molten metal pool. As a result, it is best made from high-quality cast or forged steel. It has a cylindrical liner that holds the hot chamber and plunger, which are components of the hydraulic injection mechanism. Furthermore, most goosenecks are changeable since their quality deteriorates over time in harsh operating circumstances.


Nozzle


The nozzle controls the flow of molten metal through the gooseneck and into the die. It serves as a pathway for the metal to enter the mould in a smooth and well-directed manner. Furthermore, any excess raw material at the end of the casting cycle is sent back into the furnace via the nozzle.


Hydraulic Plunger / Piston


This component delivers molten metal into the die and keeps it under high pressure. The plunger moves up and down in the heated chamber. Its power source is an oil or gas-powered hydraulic cylinder.


Die


Finally, there's the die or mould itself. It includes the chamber and ejector pins for ejecting the component. Depending on the part shape, it may also contain extra components such as cores. The die in the High pressure die casting hot chamber technique is identical to that used in other casting procedures.