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The Difference between hot chamber and cold chamber die casting

The Difference between hot chamber and cold chamber die casting

Hot chamber and cold chamber die casting are the mains die casting methods in the market nowadays, The most of die casters use one die casting methods. because the materials used are different and the process is different, but do you know the specific difference? Today we discuss in depth. keep reading.

Hot Chamber Die Casting

Hot chamber die casting, sometimes referred to as gooseneck die casting, has a pool of liquid, semi-liquid metal in a molten state that fills the mold under pressure. Zinc and Magnesium alloy normally use Hot chamber die casting Process.

Cold Chamber Die Casting

Cold chamber die casting can be used when die casting metals that cannot be used in the hot chamber die casting process, including aluminum, magnesium, copper, and zinc alloys with high aluminum content.

The Difference between hot chamber and cold chamber die casting
cold chamber die casting machine

The Difference between hot chamber and cold chamber die casting

as a professional die casting supplier, we have fluent experience on hot chamber and cold chamber die casting machine. also know the detail of these 2 machine and process. below you can find the detail.

Types of die casting machines

Die Casting MachineMaterials
Hot Chamber Die Casting MachineZinc Alloy; Magnesium Alloy; Lead alloy;  non-ferrous metals
Cold Chamber Die Casting MachineAluminium Alloy, Brass, Copper; non-ferrous metals

Molten Temperature

as you know, each metal have different molten temperature. but there have range, according to the range you can find below detail.

MaterailMolten Temperature range
Zinc Alloy; Magnesium Alloy; Lead alloyAround 450 degree
Aluminium Alloy, Brass, CopperAround 620 degree
die casting material molten range

Furnace Location

due to save material energy and easy to cast, the molten metal furnace location is different place for both hot chamber and cold chamber die casting.

ProcessFurnace Location
Hot Chamber Die Casting Processinside die casting machine, shorten metal channel, cut energy lost, isolation air, to avoid metal oxidization.
Cold Chamber Die Casting ProcessSide of Die casting machine, feed by manual or robot.
Furnace Location

Cycle Time

Hot chamber die casting cycle time is more fast than cold chamber die casting. for examples, our multi-slider die casting machine cycle time around 7 seconds.

Cold chamber die casting cycle time is significant long, due to need to feed molten metal by manual or robot. it will spend long time.

Product size

ProcessProduct size
Hot chambersmall part.
Cold chamberbigger part, max weight can achieve 70kg per part, for examples, body of Tesla is using Cold chamber custom die casting machine.

Dies/Tooling Life

both hot and cold chamber can use same mold steel to build dies or tooling. due to hot chamber metal temperature relative low, lower impact on mold steel when solidify part, caused hot chamber die casting dies or tooling much more longer lifetime.

Working Environment

ProcessWorking Environment
Hot chamberFurnace built-in equipment, relative more cleaning
Cold ChamberFurnace side the machine, need feed material manual or robot. more dust, and relative danger.

Conclusion

Both hot and cold chamber belong to high pressure die casting process. Each process has its own advantages and disadvantages. as a professional die casting manufacturer, our team have fluent experience on die casting parts design, mold building, and casting. please let us know if you have die casting project need to run, we can handle aluminum, zinc and magnesium die casting.

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