Metalworking encompasses a wide variety of manual techniques; let us analyze in detail the different types of processing methods, as well as the associated costs and the quality of the resulting finishes.
Casting Section
Casting: This refers to the process in which metal is heated until molten and then poured into a mold. It is suitable for manufacturing parts with complex geometries.
Casting Classifications
Sand Casting: Characterized by low costs and suitability for small-batch production, this method allows for the creation of complex shapes; however, it may necessitate extensive post-processing operations.
Investment Casting (Lost-Wax Method): This processing method offers exceptional consistency and precision, and is also capable of producing complex shapes. It allows for the achievement of flawless surface finishes at relatively low processing costs, making it ideal for mass production.
Injection Casting: Used to produce complex shapes where a certain degree of dimensional tolerance is acceptable. Due to the inherent characteristics of the process, the finished product typically requires no post-processing; however, the cost-efficiency benefits of this method are only realized in the context of mass production.
Die Casting: This method involves high initial processing costs, making it economically viable only in mass production scenarios. Nevertheless, the unit cost of the final product remains relatively low, albeit with a higher degree of dimensional tolerance. It is particularly well-suited for manufacturing parts with thin wall sections.
Spin Casting: An ideal method for manufacturing small parts, typically employed in jewelry making. It allows for the use of rubber molds, thereby helping to reduce processing costs.
Directional Solidification: This technique enables the production of exceptionally robust, super-heat-resistant alloy components with superior fatigue resistance. The molten alloy is poured into a mold and subsequently subjected to a strictly controlled heating and cooling regimen designed to eliminate even the most minute structural defects.
During its development, the metal products industry has encountered numerous challenges-such as a lack of technological diversity, relatively low technical proficiency, a shortage of advanced equipment, and a scarcity of skilled talent-all of which have constrained the industry's growth. To address these issues, strategies such as enhancing corporate technical capabilities, introducing advanced technologies and equipment, and cultivating a skilled workforce can be implemented to drive the further development of China's metal products industry.
