Cold chamber die casting is used to manufacture metals with a high melting point and is highly corrosive. Alloys of copper brass and aluminum have a high melting point, as such, they are manufactured using cold chamber die casting technique. This method separates the molten metal from injector chemicals that cause corrosion hence producing a corrosive-free metal.
The cold chamber die casting process operates under high pressure. This can result in parts that are denser and have higher mechanical characteristics. Higher pressure also makes it possible for the parts to have thin walls, which increases the strength of the parts.
The metal is first melted in a furnace until it is in liquid form and is then poured into the casting machine that uses high pressure to mold the metals. The high pressure prevents the contact between injector chemicals and the molten metal hence forming a corrosive free metal. The molten metal is also exposed to high temperatures, which helps to harden the metal.
Why cold chamber die casting technique is useful
Compared to other manufacturing processes, cold chamber die casting is an effective way of producing a wide range of elements. The cold chamber die casting process produces parts with long service life and can be customized to match the aesthetics of the surrounding component.
The following are some of the advantages that the cold chamber die casting technique can provide:
1. Production of solid and heavy-duty parts
Components made using this technique are more durable than parts made by other processes. This method produces lighter castings with thin walls, which makes them stronger. Furthermore, the strength matches an alloy because die castings are not made up of distinct, separate components.
2. Eliminate corrosive elements.
Due to high pressure and temperature conditions, the method separates the molten metal from injector chemicals that cause corrosion, producing a corrosive-free metal.
3. Production of diversified shapes
Complex shapes can be produced in a cold chamber with higher selectivity than many other mass manufacturing procedures. There is little to no machining required, and hundreds of identical castings can be manufactured without additional machinery.
4. Easy assembling
Apart from producing dense parts, cold camber produces fastening parts like studs and bosses. Studs and bosses are used to assemble the parts during processing. For metal rods, external threads are made to make it easier to fasten bolts and nuts.
5. Multi-finishing designs
The parts produced with a cold chamber can be of different surface finishes. It can be textured or smooth. The surface can also be smooth-shiny or textured-shinny.
Cold chamber die casting is a cost-effective process considering the high-density elements it produces. The process requires less machine involvement, and still, it can make complex shapes of high durability. Also, the maintenance of the cold chamber is low and affordable.
Some metals have a high melting point which requires using the cold chamber. Cold chamber die casting can be economical for metals with a low melting point. Therefore, before deciding on which method to use in die casting, consider the melting point of the metal.
Interesting related article: “What is Manufacturing?“