Hot Chamber Die Casting Machine

What is a hot chamber die casting machine? 

A hot chamber die casting machine is a system that contains a series of stations that conduct the processes of hot chamber die casting machine continuously. The hot chamber die casting machine, usually combined with the CNC system, provides products that are made of metal casting techniques with high quality and value, which allows for the customization of the products.

Hot chamber die casting refers to the processes that melt and solidify the raw metals inside the cavity of the pre-casted mold, in order to form the products, which are the metal molds, following the prototype of the dies on the machine and allow for those molds to be applied in other machining processes.

As far as we know, when conducting the hot chamber die casting processes, it is required to melt and solidify the metal workpieces, which means that the furnace and coolant system are needed during the processes. On the hot chamber die casting machine, both the furnace and the coolant system are the built-in equipment. In other words, these processes can be done with different stations but on the same machine, which makes this machine a multi-functional machine.

The reason why the raw materials are molten and cooled off on one station after another can be derived from the properties that the materials have. This machine is only suitable for casting metals that have relatively lower melting points, such as zinc, tin, magnesium, or other lead alloys, since the time when the metals are melted and cooled off influence the transferring procedure of the workpieces. In other words, the above metals all require quick transferring time during the casting processes, or the products may have defects after they are made.


Hot chamber vs. cold chamber die casting methods

Now that there is a casting method called hot chamber die casting, there is its counterpart, which is called cold chamber die casting. In addition to the variation in how they are called, there are still some similarities as well as differences between each one of them.

● purpose and principle
The purpose of both the hot chamber and cold chamber casting machines is to cast the compatible raw metals, in order to produce the metal molds that are allowed for being applied in other machining works.

As for the casting principle, there is no difference due to the names of them, since both of them is to cast the metals by the melting and solidifying processes, so that the metal molds can be formed with either machine.

● work transferring procedure
The work transferring procedure refers to the procedure that transfers the molten metals into the cavity of the dies on the machine, and allows the metals to be cooled off and solidified.

On the hot chamber die casting machine, this procedure relies on the plunger and the nozzle in conjunction with the gooseneck on the same machine. However, the melting and solidifying of metals are separated for the cold chamber die casting method, which differentiates one of the variation between these two methods.

 compatible materials
It is the difference that is mentioned above that results in the compatible materials of these two methods. Since the melting and cooling of metals are continues processes, the hot chamber method would be applied on the metals with lower melting points, such as zinc, tin, magnesium, etc.

In contrast, the cold chamber method would be more suitable for metals with higher melting points, like aluminum and copper, etc.


How does a hot chamber die casting machine form and how it works?

The hot chamber die casting machine can be divided into three main stations that are managed continuously and each one of them does the individual work, including the control station, metal melting station, and die casting station.

1. control station
The control station contains the computerized system and the operator interface, which controls the orders of the procedures, the given pressure of the injectors, dies, and ejectors, and the movement of the tooling, and allow the operators to supervise and adjust the settings.

2. metal melting station
This station is responsible for the melting process. It consists of a tank that stores the molten metals, a port that is immersed in the molten metals and has a gooseneck design that acts as the channel of the transferring of metals. In addition, the hydraulic accumulator, piston, and plunger facilitate the delivering of molten metals. Also, there is a nozzle that is connected to the die casting station, which serves as the inlet of the dies.

3. die casting station
This station is in charge of the cooling and solidifying of the metals, which is the forming of the metal molds. There is a fixed platen that is connected to the melting station with the nozzle, and contains one half of the die and the injector that inject the molten metal. 

Besides, the moving platen that holds the other half of the die, in combination with the clamps and the ejectors, are applied for the ejecting of the metal molds after they are cooled off and solidified.

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