jinsun carbon logo

Have Any Question


Send Your Mail


What are graphite molds used for?

Carbon Graphite Products

Graphite molds are type of molds used for casting metals and other materials. They are specialized form of die casting used to manufacture high-precision, complex parts that require high strength and structural stability. In this article, we will discuss a graphite mold, its advantages, different types, how to choose a suitable one, and its casting process, and more.

What are graphite molds?

Graphite molds are made of graphite (a form of carbon). They are mainly used to precisely cast various metals, alloys, and other materials. The manufacturers produce it by machining a block of graphite into the desired shape, then using a special bonding process to create the mold cavity. The resulting molds are so precise that you can cast complex shapes with minimal labor.

Graphite molds for jewelry, silver, metal casting

What is the use?

Graphite molds are used in casting processes such as silverware, jewelry making, and metal casting. Melting the metal at high temperatures and shaping the shape and design occurs in graphite molds.  In the automotive industry, They are used in the injection molding process to make automotive parts, such as car tires, by injecting molten plastic into the mold to form the desired shape. Leading semiconductor manufacturing: manufacturing of steel and non-ferrous metals.  In addition, they also use it in powder metallurgy, and they manufacture components with tight tolerances.

How to make a graphite mold?

Graphite molds are created by pouring molten material, such as molten plastic, into a mold made of graphite. Once the molten material had cooled, people removed the graphite mold, leaving a replica of the desired object. Sometimes, we may need additional finishing, such as sanding, polishing, and painting. Graphite molds are also often used for die-casting, where molten metal is poured into the mold and then cooled, leaving behind a perfect replica of the desired shape.

How long does a graphite mold last?

The lifetime of graphite molds depends on several factors, including the composition of the casting material, casting temperature, and cooling rate. Generally, you can use them continuously released for over 100 hours and reprocess them to make the surface smooth. Furthermore, you can store it indefinitely without deformation or oxidation. With proper care and maintenance, they can last for many years. This period is when you can’t subject them to stress or wear.


Graphite molds offer some advantages over other types of molds. They are exact, and we can use them to produce parts with extremely high accuracy. This means that parts made using graphite molds will have a shallow rate of defects. Additionally, we can machine and shape it into complex shapes with minimal effort, allowing for various part designs.

The Machining Process

Graphite molds can be machined to create complex shapes and features. We use a CNC machine to cut the graphite into the desired shape. We typically use this process to produce custom graphite molded parts and assemblies. It creates a wide range of shapes and features.

We carefully monitor the machining of graphite molds to ensure that the parts produced have the desired shape and precision. Additionally, we keep our graphite clean and well-lubricated to prevent it from becoming brittle or cracking. Finally, the machining process must take place in a controlled environment. This is to ensure that the parts produced are of the highest quality.