If you have an idea about the die casting process, you must be familiar with cold chamber pressure die casting. But, if you don’t, then this article is for you. It is a manufacturing process for metals with high melting points such as aluminium, zinc, and copper. The cold chamber die casting process requires an outside furnace and a ladle. The ‘ladle’ is for pouring the molten metal. This method is known for its ability to produce denser metal castings.
The cold chamber die casting process
Besides being ideal for high melting point metals, the cold chamber die casting has corrosive properties. It separates the melting pot from the injector. At the beginning of the process, the molten metal is taken from the furnace and ladled into the short chamber using a pouring hole. The plunger then forces the metal into the die through the shot chamber. This process requires pressure ranging from 2000 and 20000psi. In cold chamber die casting, firstly, metal is heated, which turns into a molten state. It gets transferred to the casting machine from a furnace. The plunger pushes the molten metal and transports it to the mould’s cavity.
Advantages of cold chamber die casting
The cold chamber die casting process is cost-effective and creates a broad range of shapes. The parts have good durability and give long service life. This manufacturing method has many benefits. Some of them are below.
- Increased weight and strength: The cold chamber die casting parts are very strong. The die casting does not have any separate parts welded together. So, the power is of the metal itself.
- Dimensional accuracy and stability: The parts produced are durable and stable. They maintained close tolerance and are heat resistant.
- Simplified assembly: It provides bosses and studs, the integral welding elements. Moreover, the holes are cored, allowing the casting of external threads.
- High-speed production: The cold chamber die casting process produces complex shapes with closer tolerance. There is no need for machining. It yields thousands of identical castings.
- Multiple finishing techniques:The parts are smooth and have textured surface finishing. Apart from this, you can plate them with surface preparation.
Besides the advantages, the cold chamber die casting has some demerits. The process is slower than the hot chamber die casting. It is because of using an external furnace at the beginning of the production process. Furthermore, it requires much pressure to fill the cold chamber.