Automatic packaging system’s

I. Basic working principle and structure: Once the quantitative packaging scale enters automatic operation mode, the control system opens the feeding door to start feeding material; this feeding device operates in two modes: fast feeding and slow feeding； When the material weight reaches the fast feeding set value, stop fast feeding and maintain slow feeding ； When the weight of the material reaches the final set value, close the feeding door to complete the weighing process ； At this point, the system checks whether the bag-clamping device is in the predetermined state. Once the packaging bag has been clamped, the system sends a control signal to open the discharge door of the weighing hopper, allowing the material to enter the packaging bag; once the material has been loaded, the discharge door of the weighing hopper closes automatically ； After the material is emptied, release the bag-clamping device and the packaging bag drops automatically ； After the packaging bag falls, it is sewn up and transported to the next workstation. It operates automatically in this cycle. A quantitative packaging scale consists of a weighing unit, a trolley, a sealing and conveying device, a pneumatic system, a dust removal system, etc. The key component that affects the packing speed and accuracy is the weighing unit, which includes a material storage bin, gates, a material cutting device, a scale body, a bag-clamping device, brackets, and electrical control devices. The storage bin is a buffer-type bin used for storing materials and providing a nearly uniform material flow ； The gate is located at the bottom of the storage bin; it is used to contain the material inside the bin when the equipment is under maintenance or malfunctioning ； The material cutting device consists of a cutting hopper, a cutting door, pneumatic components, and an air supply valve. It provides two feeding modes – fast and slow – during the weighing process, and the material flow for both fast and slow feeding can be adjusted separately, thereby ensuring that the quantitative packaging scale meets the requirements for accuracy and speed in measurement ； The function of the air replenishment valve is to balance the air pressure difference within the system during weighing ； The scale body is primarily composed of a weighing hopper, a load-bearing frame, and weight sensors, which are responsible for converting the weight into electrical signals and transmitting them to the control unit ； The bag-clamping device is mainly composed of a bag-clamping mechanism and pneumatic components, and its function is to clamp the packaging bag so that all the material that has been weighed falls into the bag ； The electrical control device consists of a weighing display controller, electrical components, and a control cabinet; its function is to manage the operation of the control system, ensuring that the entire system functions in an orderly manner according to pre-set procedures.