Process of Gravity Die Casting

by Ryan Brown Custom Metal Casting Manufacturer

For creating repeatable medium- and high-volume parts, al gravity casting is highly suitable and it is a form of die casting. We often refer to it as a permanent mold. From high-pressure die casting it is quite different and when compared to high pressure die casting it is used for parts that are slightly heavier, larger in size, and have higher structural requirements.

In the manufacturing process, gravity die casting is a versatile and effective means of quickly creating parts. Metal is formed into a shape along with other forms of die casting and with the help of a mold cavity. In producing the same part this method allows a single set of dies to be reused indefinitely. This fortunate one as the cost of the metal dies and casting machinery can be high. Because of their excellent surface finish and strength gravity die castings are desirable.

In this particular article, we will learn about the specific process of gravity die casting and other forms of die casting, the metals used, and the advantages and disadvantages. By having this information, you will be able to make a good choice while deciding whether gravity die casting is the right choice for your business or product. Let’s look at where does the process of die casting has arrived before getting started.

Gravity Die Casting

Gravity die casting varies from high-pressure die casting, in the aspect of the molten metal filling the mold, the gravity is responsible. For those al gravity casting manufacturers who need quick turnaround and mass production, this technique is the perfect solution. Compared to those produced by sand casting the parts produced via this method tend to be thinner, but are quite heavier and thicker compared to those produced by high-pressure die casting.

The die itself is prepared from steel that is very much strong and resistant to the temperatures required to melt aluminum, zinc, or other alloys used for the part. In the process of gravity die casting, three different stages are involved:

Die Release Agent: In the process, heating the mold and coating it with a spray chemical is involved in the initial step helping in a release. There are multiple functions of this release agent and when the alloy part has been removed it also helps cool the surface of the die.

Metal Pouring: Into the mold, the batch of the molten alloy is poured after the application of the coating is completed. This is performed by pouring the metal into runners, which then carry it to the different parts of the cavity and allow it to properly fill the space. There is a runner designated that makes sure that the liquid fills the cavity from the bottom up.

Release of the Part: Due to the heat-sinking effect of the die as well as the release agent spray coating the part gets cooled. At this particular stage, the solidified casting is processed in such a way that it removes the gates and runners that feed the molten metal into the al gravity casting cavity.