Hot chamber die casting and cold chamber die casting both belong to High pressure die casting; However they are complete difference on material and machine; hot chamber die casting mainly means Zinc alloy die casting, and this process use Zinc Alloy ingot. so how the hot chamber die casting working?
How is hot chamber die casting work?
Casting is one of the most important steps in manufacturing, and die casting is a popular method. It’s used to create precision parts that can deliver consistent quality and repeatability. So how does it work?
Basically, you take molten metal and pour it into a mold that has been heated to just above its melting point. This allows for smoother surfaces and more interesting shapes than other methods such as sand casting.
Now you know what die cast means! But there’s still a lot more information you might want to know about this process if you want to start making your own parts. Here are some other things you should know about die casting before trying it out for yourself.
Type of die casting
Die-casting machines are generally divided into 2 type die casting process, one is a cold chamber die casting, and the other is hot chamber die casting . based on which matel will be used. Today we want to talk about latter one.
How is The Hot Chamber Die Casting Working and Process?
They use a hydraulic piston that pushes molten metal out of the furnace into a mold. The hot runner contains an alloy crucible as part of the machine itself and uses a flexible neck to inject material from the pot into the mold.
When the chamber cylinder returns to the depressurized position, the molten metal is fed into the mold first; second press molten metal into the mold; third the mold opened after cool down and solid; Final the cast part injected out. Once solidified; the plunger retracts and the molten part is discarded; manually removed from the machine, or pushed out of the lid mold.
Subsequently; the plunger retracts and the nozzle itself removed after mold opening; Once solidified; mold open and casting part ejected out; Most castings have a flash at the junction of the two mold halves.
Ejector pins push the casting out of the ejector die. As the plunger uncovers the filling hole, molten metal flows through the inlet to refill the gooseneck.
The Difference Between Hot Chamber Die Casting And Cold Chamber Die Casting
- The cold chamber machine requires additional equipment, usually an external furnace and a ladle for pouring metal into die casting mold. why?
- aluminum, magnesium, and copper Molten degree will be 450 degree; Need separate furnace to molten the ingot.
- However, zinc, magnesium, and lead molten degree around 420 degree. the furnace inside die casting machine can achieve this degree.
The only difference for hot and cold chamber is melting furnace different locations; as you know the furnace for cold chamber die casting is side of die casting machine.
Hot Chamber Die Casting Advantage
Hot Chamber die Casting is an efficient manufacturing process; it can produce huge quantity with various shapes; as you know; pressure die castings are made of non-ferrous metals; such as zinc, copper, aluminum, magnesium, lead, tin and tin-based alloys.
Suitable for complex thin-walled parts (> 0.05)
>> High dimensional precision and high process stability
>> Lightweight, high stability
>> Smooth surface and edges
>> Excellent processing performance, Low cycle time, Automatic Run.
>> High thermal conductivity
>> Good conductivity
>> Corrosion and weather resistance
>> A variety of surface treatments are possible
>> Low unit price for larger series
>> Reduce relatively high tool costs through optimized tooling structure on demand
Hot Chamber Die Casting Disadvantage
The high cost of molds and capital equipment costs limit the mass production of components for this process. Casting equipment and metal molds involve high capital costs, which often limit the process of mass production.
Which Process will be Benefit for you?
if you want to produce zinc, magenisum,tin and lead castings, you should choose a hot chamber die casting machine because it corrodes easily and is more suitable for alloys with low melting points and correct fluidity. Disadvantages include slower production cycles, often due to the need to pour metal into the chamber.
Cold Chamber Die Casting; Casting cycles are much shorter, so it has a large production capacity. It has longer casting cycles; hence the performance is lower. Suitable for low melting alloys. Suitable for high melting alloys. Has a shorter tool life. Minimal security measures required.
As a zinc and mg die casting supplier, our professional team and equipment will guarantee the quality of your products and requirements.we provide zinc and Aluminium die casting and die casting manufacturing, If you have zinc, aluminum alloy products to develop, please contact us