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
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 Machine | Materials |
| Hot Chamber Die Casting Machine | Zinc Alloy; Magnesium Alloy; Lead alloy; non-ferrous metals |
| Cold Chamber Die Casting Machine | Aluminium 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.
| Materail | Molten Temperature range |
| Zinc Alloy; Magnesium Alloy; Lead alloy | Around 450 degree |
| Aluminium Alloy, Brass, Copper | Around 620 degree |
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.
| Process | Furnace Location |
| Hot Chamber Die Casting Process | inside die casting machine, shorten metal channel, cut energy lost, isolation air, to avoid metal oxidization. |
| Cold Chamber Die Casting Process | Side of Die casting machine, feed by manual or robot. |
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
| Process | Product size |
| Hot chamber | small part. |
| Cold chamber | bigger 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
| Process | Working Environment |
| Hot chamber | Furnace built-in equipment, relative more cleaning |
| Cold Chamber | Furnace 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.