Dalian casting is a common metal processing component with advantages such as low cost, high production efficiency, and light weight. There are various types of materials, and the manufacturing process includes mold making, melting, casting, and post-processing. The quality of castings is closely related to the process and mold accuracy, and strengthening quality management and process control can improve product quality. Castings are widely used in many industries such as automotive manufacturing, aerospace, and mechanical manufacturing.

The production process of castings mainly includes four steps: mold making, melting, pouring, and cooling. Mold making refers to the production of corresponding molds based on the shape and size requirements of casting parts. There are two types of molds, one is sand mold, which is made by mixing casting materials with a certain proportion of sand, compacting and hardening in the mold to produce a mold with the same shape as the casting part; Another type is metal mold, which involves injecting liquid metal into a mold shaped like a casting, waiting for it to cool and solidify, and then removing the metal mold.

Dalian Casting Classification Guidelines: Choosing the Right Materials and Manufacturing Methods

Iron castings: including gray cast iron, ductile iron, and white cast iron. Grey cast iron has good compressive and wear properties, and is mainly used for manufacturing parts and mechanical foundations. Ductile iron has high strength and toughness, and is commonly used in the manufacturing of automotive engines and chassis. White cast iron has high hardness and wear resistance, making it suitable for manufacturing friction pair parts.

Aluminum castings: Aluminum alloys have good corrosion resistance and thermal conductivity, and are commonly used in the manufacturing of aircraft parts, automotive parts, and electronic product casings.

Copper castings: Copper alloys have good thermal conductivity and conductivity, making them suitable for manufacturing electrical connectors and thermal conductive components.

Lead castings: Lead alloys have good malleability and lubrication properties, and are commonly used in the manufacturing of bearings and sealing components.

Titanium castings: Titanium alloys have high strength and corrosion resistance, making them suitable for manufacturing aerospace and medical devices.

Castings have a wide range of applications. In the mechanical manufacturing industry, many mechanical parts are made through casting processes, such as beds, machine frames, engine cylinder blocks, etc. In the aerospace industry, castings are widely used to manufacture key components of aircraft engines, with the characteristics of light weight and high strength. In the automotive industry, castings are often used to manufacture components for automotive engines and suspension systems. In the power industry, castings are used to manufacture pressure vessels for nuclear power plants and rotors for turbo generators.

The quality of castings mainly depends on the stability of the casting process and the accuracy of the mold. A stable casting process can ensure the stability of the forming quality and mechanical properties of the castings. The accuracy of the mold directly affects the shape and dimensional accuracy of the parts, therefore, the manufacturing process and equipment requirements of the mold are high. Manufacturing high-quality castings requires strengthening process control and quality management to ensure that each process meets the requirements, in order to reduce defect rates and improve product quality.