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Currently, IT technologies, advanced automated machinery, as well as intelligent detection, control, and adjustment devices have been incorporated into logistics packaging, thereby promoting the development of automated packaging lines. An automatic packaging line integrates equipment and technologies such as carton forming, automatic boxing, and automatic sealing; it is not simply a combination of multiple separate packaging devices, and the most appropriate setup must be determined based on the characteristics of the products manufactured by the company. With changes in market demand and the development of high-tech, the logistics and packaging sector, which was originally labor-intensive, is also undergoing changes. Single-packaging equipment can no longer meet the requirements for efficiency and precision in packaging large volumes of products. Consequently, automated packaging production lines have been developed and are now widely used. The automatic packaging line integrates functions such as carton forming, automatic boxing, and automatic sealing. It can be designed and manufactured to meet various customer-specific packaging requirements, thereby **improving safety and accuracy in the packaging process and further freeing up labor resources for packaging tasks. In reality, an automatic packaging line is not merely a simple combination of multiple different packaging machines; it requires the most appropriate configuration based on the characteristics of the products being packaged, in order to streamline the process and improve efficiency. I. Introduction to the characteristics of automatic packaging lines: An automatic packaging line is essentially a system that, in accordance with the packaging process, connects automatic packaging machines and related auxiliary equipment through conveyor systems. It is also equipped with necessary automatic detection, control, adjustment, and compensation devices, as well as automatic feeding devices. As a result, it becomes a system with independent control capabilities, capable of ensuring that the materials to be packaged are combined with packaging materials, auxiliary packaging items, and packaging containers in accordance with predetermined packaging requirements and procedural steps, thus completing the entire packaging process. By using an automatic packaging line, the packaging of products is no longer carried out one by one using individual machines for each packaging step; instead, separate automatic or semi-automatic packaging machines and auxiliary equipment are combined in a sequential order according to the packaging process to form a continuous production line. The items to be packaged enter from one end of the conveyor belt, and at a certain production rhythm, they pass through each packaging station in accordance with the predetermined packaging procedure. The packaging equipment at each station is used to combine the packaging material with the items being packaged. After completing all the packaging steps, the packaged products are continuously output from the other end of the conveyor belt. Automatic packaging lines can improve working conditions and labor productivity, enhance the quality of packaged products, make rational use of resources, and reduce the costs associated with product packaging. They are suitable for packaging products in small varieties but large quantities, and represent an important system for large-scale packaging production. 1. Classification of automated packaging lines (1) Based on the connection characteristics between packaging machines, they can be divided into: ① Rigid automated packaging lines, which are those in which the various packaging machines are directly connected using conveying devices, enabling packaging operations to be carried out at a consistent production pace. This production line has one drawback: all the machines operate at the same pace, and if a fault occurs in any stage of production, it will cause the entire line to stop operating. ②In the flexible automated packaging line, storage devices are installed between each packaging machine, and items are conveyed to the next packaging step by a conveyor system as needed. This overcomes the drawbacks of automated rigid packaging production lines; even if one packaging machine fails, it does not affect the packaging operations of the other machines. ③A semi-flexible automated packaging assembly line divides the automatic production line into several sections; storage devices are not installed in those sections that are less prone to failures, in order to increase their rigidity ； Storage devices are added to the sections that frequently experience failures in order to improve their flexibility, which ensures productivity while reducing investment costs. (2) Based on the layout of the packaging machines, they can be classified as follows: ① Serial automated packaging lines, where each packaging machine is connected in sequence according to the manufacturing process, with all machines operating at the same pace. The structure of this assembly line is relatively simple, with a compact layout, and it requires that the operating speeds of the various packaging machines be consistent. ②A parallel automated packaging line groups devices with identical packaging functions together to carry out the same packaging tasks, until all tasks related to packaging the materials are completed. In this type of pipeline, reversing or merging devices generally need to be added. ③A hybrid automated packaging line utilizes both series and parallel configurations on a single production line; the purpose of this is to balance the production rhythm of various packaging machines and ensure that their productivity is matched. However, this often results in longer packaging automated production lines and a larger number of machines, which in turn makes the types of devices for conveying, reversing direction, splitting streams, and merging streams more complex. 2. Composition of automatic packaging lines. There are many types of automatic packaging lines, and the products they are used to package vary as well, but generally they can be divided into four components: a control system, an automatic packaging machine, a conveying device, and auxiliary processing devices. (1) Control system: In an automatic packaging production line, the control system functions similar to a human brain; it connects all the devices in the line into a cohesive whole. The control system mainly consists of a working cycle control device, a signal processing device, and a detection device. With the development of science and technology, various high-tech technologies such as numerical control, photoelectric control, and computer control have been widely adopted in automatic packaging production lines, thereby making the control systems more sophisticated and reliable, as well as increasing efficiency. (2) Automatic packaging machine: An automatic packaging machine is a type of equipment that does not require direct intervention from an operator; it is primarily controlled by an operating system, with its various components carrying out coordinated actions within a specified time frame to complete the packaging process. Automatic packaging machines are the most fundamental processing equipment in automated packaging production lines; they constitute the core of such lines. They primarily include equipment that performs tasks such as conveying and feeding packaging materials (or containers), metering, filling, sealing, and labeling of the products to be packaged—examples include filling machines, encasers, strapping machines, sealers, etc. file:///C:\Users\ADMINI~1\AppData\Local\Temp\ksohtml7768\wps16.png The fully automatic low-table packer (3) – The conveying device is a crucial component that connects multiple semi-automated packing machines, thereby forming an automated production line. It is responsible for transferring items between various packaging stages, as well as ensuring that packaging materials (or containers) and the products to be packaged enter the automated packaging line, while finished products exit from it. Common conveying devices are generally divided into gravity-based and powered types. Powered conveying devices use a power source such as a motor to drive the transfer of materials; they are the most widely used conveying devices in automated packaging production lines. They can not only transport materials from a higher position to a lower one but also from a lower position to a higher one, with a stable and reliable conveying speed. (4) Auxiliary process devices: In an automatic packaging production line, in order to meet the process requirements and ensure that the line operates in a rhythmic and coordinated manner, certain auxiliary process devices are needed, such as steering devices, diversion devices, convergence devices, and so on. A steering device is a mechanism designed to meet packaging requirements, used to change the conveying state of the items to be packaged or to alter the direction in which such items are conveyed. There are various structural types of steering devices, and the choice should be made based on different materials and requirements. A diversion device is a mechanism designed to balance the production rhythm and improve productivity; it diverts the products that have been packaged by the front-end packaging machine to other packaging machines so that subsequent processing steps can be carried out. Common shunt devices include arm-type, two-right-angle type, swinging type, valve type, guide rail slider type, and so on. A merging device is a mechanism used to achieve merging purposes, connecting multiple packaging machines from the preceding process stage with one packaging machine from the subsequent process stage. Common types of merging devices include guide plate type, push plate type, and rotary disk type. 3. Features of automatic packaging lines: Currently, IT technology, advanced automated machinery, as well as intelligent detection, control, and adjustment devices have been incorporated into logistics packaging, thereby promoting the development of automatic packaging lines. Automatic packaging lines also demonstrate their advantages in the packaging industry, with specific features evident in various aspects. file:///C:\Users\ADMINI~1\AppData\Local\Temp\ksohtml7768\wps17.png Unmanned post-packaging production line (1): Packaging automation. The degree of automation serves as a crucial indicator of the level of packaging equipment and technology. It encompasses two main aspects: the automatic control of process procedures, process parameters, material flow, product quality, operational malfunctions, and safety precautions; and the automatic inspection of packaging items, packaging materials or containers, packaged products, and the packaging process itself. Automated equipment is utilized throughout the entire packaging production process, such as the automatic sorting and feeding of packaging materials or containers, as well as the output of products; the automatic coordination between individual machines, machine groups, and production lines, along with automatic fault handling; and online automatic inspection of packaging quality and automatic rejection of defective products. file:///C:\Users\ADMINI~1\AppData\Local\Temp\ksohtml7768\wps18.png Automated packaging equipment (2): These equipment systems are highly integrated. Automated packaging production lines typically consist of continuously operating single machines or machine groups that work in unison. They are highly integrated; usually, single machines or machine groups with different functions are combined with auxiliary equipment to form a continuous production line. Alternatively, production lines with multiple functions are designed and manufactured. Such lines integrate various functions required in modern production—such as bag making, filling, sealing, weighing, palletizing, transportation, cleaning and sterilization, metering, labeling, printing, inspection, and conveying—into one comprehensive production system. (3) High versatility: The generalization and serialization of packaging equipment, as well as the modular composition of packaging lines and equipment, facilitate the realization of packaging automation. Users may have different requirements regarding the properties of the materials, the accuracy of weighing, as well as packaging and sealing, but many of the operations are the same or similar, with only differences in size. Therefore, the standardization of packaging automated production lines can enhance their utility. (4) High technological content: The application of new technologies such as IT and sensing technologies results in a combination of high-tech and traditional technologies. This improves the working quality, precision, speed, and reliability of automated packaging production lines, thereby promoting their development towards intelligence and a high degree of automation. For instance, computer control technology is used to achieve precise metering for quantitative packaging of materials, as well as automatic control of high-speed filling and packaging processes. With the development of automated packaging production lines, there is an increasing demand for integrated management and control. III. The future development of automated packaging lines: Faced with huge market potential, logistics packaging equipment manufacturers must actively improve their technical capabilities and leverage technological innovation to enhance the industry’s ability to adapt to market changes, thereby better meeting customers’ needs for logistics packaging. Therefore, in the planning and design of automated packaging lines, it is necessary to pay attention to some new changes. 1. The demands on production efficiency are increasing. The fast-paced lifestyle affects everything around us, and the packaging industry is no exception. High-speed packaging machines require proper integration with the preceding process, without the need for any handling steps, including control integration. The entire production line, including the production and packaging processes, should be started in reverse order and stopped in sequence. 2. There is an increasing demand for flexibility in packaging equipment. Due to the wide range of industries served, as well as differences among industries and product production methods, it is necessary to redesign solutions each time, which is one of the challenges in designing logistics packaging systems. In the future, packaging equipment will need to have a high degree of flexibility, allowing the size of the packaged items to vary within certain limits. Since the product life cycle is much shorter than the lifespan of the equipment, changing the product and packaging does not require replacing expensive packaging production lines. 3. There are increasing demands on packaging machinery to ensure efficient production and logistics operations; therefore, packaging equipment must have automatic recognition capabilities, such as the ability to automatically detect the thickness, hardness, and rebound force of packaging materials. This information is then fed to the robotic arms via a computer to adjust their movement range, thereby preventing rebound. Furthermore, by identifying the location of the items, they can be placed in the trays at the exact position and orientation, which is fast and accurate, eliminating the errors that arise from manual handling.