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Permanent Mold Casting

2023-11-16 15:18:21

Permanent Mold Casting

Permanent Mold Casting is a manufacturing process that involves pouring molten metal into a reusable metal mold, typically made from steel or cast iron, to produce various metal components. The term "permanent" mold signifies that the mold can be utilized multiple times.

In the initial step, the permanent mold is prepared by heating and applying a ceramic coating to prevent the part from adhering. The mold is then assembled, incorporating two halves and cores if necessary. Molten, typically non-ferrous metal is poured into the mold, filling the entire cavity. Once filled, the molten metal cools, solidifies, and the completed piece is extracted by separating the two halves.

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In the case of slush casting, the exterior of the piece cools while the interior remains liquid. The inner liquid is poured out to create a hollow piece. If a more detailed piece is required, molten metal can be forced into the mold using low pressure or vacuum pressure. Regardless of the method, the final step involves cleaning up the piece by trimming away excess material from the pour site.


Permanent Mold Casting offers several advantages, such as high production rates and mold reusability. The process allows for the creation of complex shapes with low labor costs through automated procedures, resulting in finished pieces with excellent surface finish and dimensional accuracy. Additionally, it generates minimal waste. However, drawbacks include the higher initial cost of creating metal molds and the limitation to non-ferrous metals due to their lower melting points, unless a specialized graphite mold is employed. The molds also have a limited lifespan due to erosion and thermal fatigue.

Applications of Permanent Mold Casting are widespread in the automotive industry, where it is employed to manufacture gears, castings, suspensions, fuel injection housings, and engine pistons. Additionally, the process is commonly used for producing aircraft parts.

Dongrun Casting have 20000 square meters facility houses and 200 production & test equipment, From quotation and tooling design to casting and finished machining, we  can work with you at every stage. We serves wide range of industries-from Fortune 500 corporations to small and midsize OEMs. Our products includes: Automotive&TruckingElectric Utility & Communications,  Metering SystemHydraulic IndustryMedical Devices,  LightingFuel and Gas PressureFurniture parts.

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