Difference between hot chamber and cold chamber die casting includes equipment structure, material suitability, production efficiency and so on.

Hot chamber die casting and cold chamber die casting are two common die casting processes, which have significant differences in equipment structure, material applicability, production efficiency and safety.

1. Difference between hot chamber and cold chamber die casting：Equipment structure

• Hot chamber die casting: The hot chamber die casting machine injects molten metal directly into the mold cavity. The molten metal stores in a molten pool inside the machine, and the metal injectes into the mold through a device called a “gooseneck”. This design makes the hot chamber die casting machine easier to operate, but it requires frequent cleaning of the residue in the mold.

• Cold Chamber Die Casting: Cold chamber die casting machines require an external furnace to heat the metal. The molten metal introduces into the mold cavity through a pouring cup (gating system). Cold chamber die casting machines are usually used to process high melting point metals such as aluminum, magnesium and copper.

2. Difference between hot chamber and cold chamber die casting：Material suitability

• Hot chamber die casting: suitable for low melting point metals such as zinc, magnesium and tin. These metals have good fluidity and are easy to process, so hot chamber die casting is suitable for large-scale production.

• Cold chamber die casting: suitable for high melting point metals such as aluminum, magnesium and copper. These metals have high melting points and poor fluidity, so cold chamber die casting is more suitable for small-scale production.

3. Production efficiency

• Hot chamber die casting: Since the molten metal is heated directly inside the machine, the production cycle is short and suitable for high-volume production environments. Hot chamber die casting machines can produce continuously, thereby improving production efficiency.

• Cold chamber die casting: Each production cycle requires the addition of new molten metal from an external furnace, so the production speed is slow and suitable for small batch or customized production.

4. Safety and maintenance

• Hot chamber die casting: Due to the high temperature inside the machine, the maintenance and life of the equipment may be affected. In addition, attention should be paid to the safety protection of high-temperature metal during operation.

• Cold chamber die casting: Since the machine is separated from the molten metal, the equipment cools faster, reducing the operating temperature and thus improving safety. At the same time, due to the better cooling effect of the equipment, the tool life is longer.

5. Product quality

• Hot chamber die casting: Since the molten metal is directly injected into the mold, it can achieve high dimensional accuracy and surface finish, and is suitable for manufacturing small parts with complex geometries.

• Cold chamber die casting: Although the production speed is slower, it can better control the metal flow and solidification process, thereby reducing internal defects such as pores, etc., and is suitable for manufacturing thick-walled or complex parts.

The choice of hot chamber die casting or cold chamber die casting depends on the specific application requirements, including material type, production scale, cost budget and product quality requirements. Each process has its own unique advantages and limitations, so in practical applications, it is necessary to make a reasonable choice based on the specific situation.

Haichen die casting machine

Haichen is one Chinese die casting machine manufacturer for more than 10years. We produce both high pressure cold chamber die casting machine and hot chamber die casting machine.They have durable and highly precise features.

Haichen also produce die casting machine auxiliary equipment. Such as conveyor, vacuum machine, mold temperature controller, industrial robot, sprayer and so on.

We supply cold chamber and hot chamber die casting machine spare parts. When you have any demand, feel free to contact us.