Dalian castings are an important industrial manufacturing product widely used in various fields, which is of great significance for promoting economic development and enhancing industrial competitiveness. With the continuous progress of technology and changes in market demand, the manufacturing process and quality control of castings will continue to be further improved, making positive contributions to promoting industrial modernization and innovative development.

There are various types of castings, which can be divided into various types based on different manufacturing processes and applications, including sand casting, metal casting, die casting, and low-pressure casting. Among them, sand casting is a common method, which involves pouring molten metal or alloy into the sand mold and removing it after cooling to form the required parts. Metal mold casting is the process of producing the required castings by pouring molten metal into a metal mold.

How to determine whether the quality of castings is qualified or not?

Appearance quality: Check whether the surface of the castings is flat, and whether there are any bubbles, sand holes, cracks, defects, and other issues. Qualified castings should have a smooth appearance and no obvious defects.

Dimensional accuracy: Check whether the dimensions of the castings meet the design requirements and whether there are any large or small dimensional deviations. Dimensional accuracy can usually be checked using measuring tools such as calipers.

Chemical composition: Conduct chemical composition analysis on castings to ensure compliance with design requirements and avoid performance degradation or other issues caused by unqualified components.

Physical performance: Test the hardness, tensile strength, and other physical performance indicators of castings to ensure compliance with standard requirements and ensure safety performance during use.

The manufacturing process of castings usually includes the following steps: raw material preparation, mold manufacturing, metal melting, pouring, cooling, demolding, cleaning, and post-treatment. It is necessary to prepare casting materials, usually metals or alloys, to meet the mechanical properties required for the parts. Then, according to the design requirements of the parts, a mold is made, and the design of the mold directly affects the quality of the castings. Next, the metal or alloy is melted, usually through a high-temperature furnace, to facilitate pouring. During the pouring process, it is necessary to control the temperature and flow rate of the metal to ensure complete filling of the casting.

Casting is an ancient processing method in the manufacturing industry, which involves casting molten metal or alloys into molds and then natural or mechanical cooling to obtain the required components or products. The term "casting" comes from the Latin word "fundere", which means "pouring or casting". In modern industrial production, casting is a very important manufacturing process, widely used in fields such as automobiles, machinery, aerospace, electronics, and construction.