The Working Principle of Die Casting

Update:Oct 31 2016

What is die casting? Well, it is a metal casting method […]

What is die casting? Well, it is a metal casting method that is exemplified by forcing molten metal under high pressure into a steel mold. Two hardened tool steel dies are used to create the mold cavity which has been machined into shape and work correspondingly to an injection mold throughout the action. The metal hardens quickly after the injection and then the part gets cast out from the mold. Die casting parts are characterized by their distinct, smooth or textured shells and dimensional regularity.

Basically, die casting makes use of steel molds called dies where molten metal is enforced hooked on with tremendously high-pressure. Die casting is a resourceful technique that allows for a range of stages of intricacy in manufacturing, from steel sinks to tiny toy cars. At the same time, it still maintains complete exactitude to generate an unblemished end product.

In die casting, there are four steps involved and it is a must that each phase is completed thoroughly before getting on to the next phase, as it allows perfection in the end product. The die worker must be certain that the die casting machine is at the required temperature. There are several possibilities for it to get wrong if the die is cold when the molten metal is injected, because it will solidify too quickly without conforming to the correct shape. Heating will take some time according to the size of the designed cast, so only after the die reaches the right temperature, the casting should begin.

Generally, the mold is sprayed with lubricant and then closed. Lubricating helps to regulate the temperature inside of the die, at the same time, it also allows helps in trouble-free removal of the cast.

In the next step, the molten metal is injected into the die and then the metal is inserted at an enormously high pressure, thereby it allows the metal to conform to the fixed figure of the die, devoid of the risks of puffiness or air pockets inside the product.

After the mold is allowed to cool and the metal gets solidified. The mold is immersed or sprayed with cold water to ease the casting. Still, the high-pressure is maintained inside the mold. Finally, the die opened and the solid cast removed.

Like die casting, plastic injection molding is also an important process in the engineering industry, and through this small and complex parts are produced with accuracy.