In the early days, people generally used various cranes and conveyors to complete loading and unloading work. With the continuous increase of loading and unloading operations, loading and unloading machinery that can retrieve items on their own has gradually emerged.

Conveyor machinery can be divided into two types based on installation methods: fixed conveyors (with large conveying capacity and high efficiency) and mobile conveyors (with strong maneuverability); According to structural characteristics, it can be divided into conveyors with flexible components (traction components are a closed system with reciprocating cycles, such as belt conveyors, chain conveyors, etc.) and conveyors without flexible components (using the vibration of working components to transport materials in the direction, and components do not have reciprocating cycles, such as screw conveyors, vibrating conveyors, etc.); According to the conveying object, it can be divided into bulk material conveyors and general conveyors for finished products; According to the use of different primary power sources, it can be divided into power type (such as electric) and non power type (relying on material self weight inertia or manual thrust).

Conveyor machinery can continuously transport materials along a fixed route, and the loading/unloading of its working mechanism is carried out during operation, resulting in fewer starting and braking cycles of the conveyor. At the same time, the transported bulk materials are evenly distributed on the load-bearing components, and the transported finished materials are also transported in a continuous manner in sequence

Nanjing Changda Machinery Factory is located in the beautiful national level new area - Jiangbei New Area of Nanjing City, founded in the 1950s. Nanjing Changda Machinery Factory adheres to the business philosophy of "quality is the life of the enterprise, integrity is the bridge of communication", practices the corporate spirit of "dedication, integrity, focus, innovation, and exploration", and has been awarded the "Contract abiding and Creditworthy" enterprise in Nanjing for 30 consecutive years. Its products have passed the ISO9001 quality management system certification.

Nanjing Changda Machinery Factory is located in the beautiful national level new area - Jiangbei New Area of Nanjing City, founded in the 1950s. Nanjing Changda Machinery Factory adheres to the business philosophy of "quality is the life of the enterprise, integrity is the bridge of communication", practices the corporate spirit of "dedication, integrity, focus, innovation, and exploration", and has been awarded the "Contract abiding and Creditworthy" enterprise in Nanjing for 30 consecutive years. Its products have passed the ISO9001 quality management system certification.

Nanjing Changda Machinery Factory is located in the beautiful national level new area - Jiangbei New Area of Nanjing City, founded in the 1950s. Nanjing Changda Machinery Factory adheres to the business philosophy of "quality is the life of the enterprise, integrity is the bridge of communication", practices the corporate spirit of "dedication, integrity, focus, innovation, and exploration", and has been awarded the "Contract abiding and Creditworthy" enterprise in Nanjing for 30 consecutive years. Its products have passed the ISO9001 quality management system certification.