Calcium Silicate ( Grade AW ) For Foundry Sleeves Application

Calcium Silicate, especially when it is of the AW grade, is commonly used in foundry applications, particularly for manufacturing sleeves. Foundry sleeves, also known as riser sleeves or feeder sleeves, are used in metal casting processes to control the solidification of molten metal and prevent defects in the casting.

Here are some key uses and applications of calcium silicate (AW grade) in foundry sleeve applications:

Insulation Material:

Calcium silicate is valued for its thermal insulation properties. In foundry applications, it is often used to create insulating sleeves that help regulate the cooling rate of the molten metal inside the mold.

Temperature Resistance:

Foundry processes involve high temperatures, and calcium silicate is known for its ability to withstand elevated temperatures. This makes it suitable for use in sleeves where it can maintain structural integrity under the extreme heat of molten metal.

High Compressive Strength:

The AW grade of calcium silicate typically exhibits high compressive strength. This property is crucial for foundry sleeves, as they need to withstand the pressure from the surrounding sand and metal during the casting process.

Low Thermal Conductivity:

Calcium silicate has low thermal conductivity, which means it minimizes heat transfer. In foundry sleeves, this property helps in controlling the cooling rate of the molten metal, ensuring a more controlled solidification process.

Dimensional Stability:

The material’s dimensional stability is essential in foundry applications to ensure that the sleeves maintain their shape and size during the casting process. This is important for producing accurate and consistent castings.

Ease of Machining:

Calcium silicate is often chosen for its machinability. It can be easily shaped and machined to meet specific design requirements for foundry sleeves, allowing for customization based on the casting needs.

Chemical Inertness:

Calcium silicate is generally chemically inert, which means it does not react with molten metal or other foundry materials. This property helps maintain the purity of the metal being cast and prevents unwanted reactions during the casting process.

Durability and Longevity:

The robust nature of calcium silicate makes it a durable material for foundry applications. It can withstand the harsh conditions of the casting process and provide long-lasting performance.

When using calcium silicate for foundry sleeve applications, it’s essential to consider the specific requirements of the casting process, such as the type of metal being cast, the casting temperature, and the desired properties of the final product.