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 What is pressure die casting process on earth?

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megan2008
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Registration date : 2013-10-26

PostSubject: What is pressure die casting process on earth?   Thu Nov 07, 2013 10:16 am

Die casting is one of the most advanced method to form metal currently for the casting manufacturers.Before die casting, many metals were welded and hammered together. This resulted in a time-consuming and costly process. Aluminum, iron and lead are alloys that can successfully undergo the die casting process. Although there are other methods of die casting, pressure die casting is considered to be a process that provides accurate and durable molds.

Background

Die casting is the process of forcing molten metals into mold cavities. The metal hardens and takes the shape of the mold. Tin and lead were the first two alloys to undergo die casting. Before die casting became widely used, plastic molding and sand casting were used to shape metal. Plastic molding resulted in a less-durable and heat-tolerant product. Sand casting results in a rougher mold and a slower production time.

Process

Cold-chamber and hot-chamber are the two main die casting process types. Pressure die casting is a variation of the two. During pressure die casting, metal alloys such as aluminum and tin are melted in a furnace. The molten material is injected with extreme pressure into steel molds. These steel molds, or dies, are made prior to the die casting process. They are reusable and recyclable. Cold-chamber machines have an injection piston connected to the furnace. This prevents corrosion better than hot-chamber machines. The injection pistons on hot-chamber machines are immersed in the molten metal. The molten metal is then shot into the mold with extreme pressure and speed. This results in a uniform, durable part that has dimensional accuracy.

Uses

Die cast alloys are used in many products. Automobile parts may undergo an aluminum die casting process. Die casting aluminum auto parts make them lighter and faster to manufacture. Aluminum is usually cast with silicon and copper because pure aluminum is more susceptible to cracking and shrinking. Mirrors, gas tanks and engine housings are auto parts that are made by die casting. Die cast drum hoops give drums a sharper and clearer sound. Cookware may also be manufactured by die casting in order to make it more durable and environmentally friendly.

Advantages

Although there are other methods of manufacturing metal products, die casting has advantages over other processes. Die casting results in a smoother surface that you can paint over with ease. You can combine a broader range of shapes and parts to make one mold. This results in faster and more efficient production. The die casting machinery and dies may be considered costly, but the die casting process is economical if a high volume of products is made.

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