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Corrugated board as an important basic material in the modern packaging industry, the performance and quality of its production line directly determine the quality and production efficiency of corrugated board.
1. Product introduction
Corrugated board as an important basic material in the modern packaging industry, the performance and quality of its production line directly determine the quality and production efficiency of corrugated board. The advanced corrugated board production line integrates the technology of machinery, electronics, automation and other fields to provide high-quality and diversified corrugated board products for the packaging industry.
2. The overall composition and process of the production line
Corrugated board production line is a complex and orderly system, usually composed of multiple key parts, the entire production process from the base paper input to the finished board output in one go.
Base paper holder part
The base paper holder is the starting point of the production line, and its main function is to carry and transport the base paper. It can place multiple rolls of different specifications of base paper at the same time to meet the needs of multi-layer corrugated board production. The high quality base paper holder has a robust structural design to ensure stable support for heavy base paper rolls. Moreover, the base paper holder is equipped with an advanced tension control system, which monitors the tension change of the base paper in real time through the sensor, and automatically adjusts the unwinding speed to ensure the uniform tension of the base paper during the transportation process, and avoids the damage or folding of the paper caused by the uneven tension, which is crucial for the quality of the subsequent corrugated cardboard.
Preheater
The preheater plays an irreplaceable role in the production of corrugated cardboard. The base paper needs to be treated by a preheater before entering the corrugated forming process. The preheater heats the base paper to a suitable temperature by means of heat conduction. This process can adjust the humidity and physical properties of the base paper, making the base paper softer and easier to shape. The advanced preheater has precise temperature control function, which can control the temperature within a very small error range according to different base paper materials and production process requirements. For example, for base paper with high humidity, the preheating temperature can be appropriately increased to remove excess water and improve the strength and stiffness of corrugated cardboard.
Corrugating machine
The corrugated forming machine is one of the core parts of the production line, which is responsible for processing the base paper into the corrugated core paper with a specific corrugated shape. Common types of corrugated are A, B, C, E, etc. Different types of corrugated have different characteristics, such as A corrugated has better cushioning performance, and B corrugated is more suitable for printing. The key component of the corrugated forming machine is the corrugated roller, which is usually made of high-quality alloy steel and goes through special processing processes such as precision grinding and surface hardening to ensure that it has a high-precision corrugated profile and good wear resistance. In the production process, the base paper is pressed into a continuous corrugated shape under the action of the corrugated roller. At the same time, the supporting lubrication and cooling system ensures the stability and service life of the corrugated roller at high speed.
Gluing machine
The glue applicator is used to evenly coat the glue on the corrugated core paper. The quality of the glue and the uniformity of the coating directly affect the bonding strength of corrugated cardboard. Modern gluing machine adopts advanced metering pump and coating head, which can precisely control the amount of glue coating. In addition, the gluing machine also has automatic cleaning and gluing adjustment functions to adapt to different production speeds and cardboard specifications. For example, in high-speed production, it can ensure that the glue is quickly and evenly coated, prevent local lack of glue or excessive amount of glue, and ensure that the bonding of corrugated cardboard is firm and smooth.
Double-sided machine
The double-sided machine combines single-sided corrugated board with other face paper to form multi-layer corrugated board. By heating the hot plate and pressurizing the pressure roller, the face paper and the corrugated core paper are firmly bonded. The temperature uniformity of the hot plate of the double-sided machine is good, and the pressure of the pressure roller can be precisely adjusted according to the number of layers and thickness of the cardboard. In the double-sided machine, the cardboard in the high temperature and high pressure environment after a certain period of time to ensure the full bonding between the layers of paper, thereby improving the overall strength of the corrugated board. At the same time, the double-sided machine is also equipped with an automatic correction system to prevent the cardboard from deviating during the composite process and ensure the quality and dimensional accuracy of the cardboard.
Drying section
The main function of the drying part is to remove excess water in the corrugated cardboard, so that the glue is completely cured, and improve the strength and stability of the cardboard. The drying department usually adopts the hot air circulation drying method, through the reasonable arrangement of air duct and heating device, so that the hot air is evenly blown on the surface of the cardboard. The advanced drying department can automatically adjust the temperature, humidity and wind speed of the hot air according to the water content and production speed of the cardboard to achieve the best drying effect. At the same time, in order to save energy, some drying departments also use heat recovery technology to partially recycle the discharged hot air.
Slitting machine and crosscutting machine
The slitting machine is used to cut wide corrugated cardboard to the required width along the longitudinal to meet the requirements of different customers for the width of the cardboard. It achieves fast and accurate cutting with high-speed rotating tool and precise positioning system. The crosscutting machine is to cut the continuous cardboard according to the set length, forming a sheet of finished cardboard. The cutting precision of the crosscutting machine is extremely high, usually using flying knife cutting technology, and equipped with advanced photoelectric tracking system and control system. The photoelectric tracking system monitors the running speed and position of the cardboard in real time, and the control system precisely controls the cutting action of the flying knife according to the set length data to ensure that the length accuracy of the finished cardboard is within the range of millimeters.
Stacker
Stacker is the last link in the production line, which neatly piles up the cut cardboard. According to the size and weight of the cardboard, the stacker stacks the cardboard on the pallet or pallet in an orderly manner through an automated robotic arm or conveyor belt system. Some high-end stackers also have intelligent identification functions, which can classify and stack according to the quality of the cardboard, and can automatically count and record production data, which is convenient for production management and quality traceability.
3. The technical advantages of the production line
High level of automation and intelligence
Modern corrugated board production line adopts a large number of automation and intelligent technology. Through the advanced PLC control system and human-machine interface, the operator can easily set and adjust the production parameters in the central control room, such as production speed, cardboard specifications, glue dosage, temperature, etc. The production line can automatically monitor the operating status of each link, once there is a fault or abnormal situation, the system will immediately issue an alarm and display fault information, convenient maintenance personnel to quickly locate and solve the problem. At the same time, the intelligent production management system can also collect and analyze the production data in real time, which provides a basis for optimizing the production process, improving the production efficiency and quality.
High production efficiency
The efficient corrugated board production line has a high production speed and can meet the needs of large-scale production. For example, some advanced production lines can produce tens of thousands of square meters of corrugated cardboard per hour. This is thanks to the optimized design of all aspects, such as fast base paper unwinding, stable corrugated forming, efficient gluing and compounding, and precise cutting and stacking. In addition, the rapid changeover ability of the production line is also very strong, and when producing different specifications and types of corrugated cardboard, adjustments can be completed in a short time, reducing downtime and further improving production efficiency.
Board of good quality
From the tension control of base paper, preheating treatment, to the fine operation of various links such as corrugated forming, gluing, drying, etc., to ensure the high quality of corrugated cardboard. High quality corrugated board has good strength, stiffness, flatness and dimensional accuracy. The bond between the layers is firm and the corrugated structure is complete, which can effectively protect the product during the packaging process, and also provides a good foundation for the subsequent printing, slotting, nail box and other processing procedures.
4. Product application field
The corrugated board produced by the corrugated board production line is widely used in the packaging field of various industries.
Food and beverage industry
In the food and beverage industry, corrugated cardboard is used to make cartons to protect the safety of food and beverages during transportation and storage. For example, the beverage box needs to withstand the weight of multiple layers of beverage bottles, while preventing external collision and extrusion, and the high strength and buffering properties of corrugated cardboard can meet this demand. Moreover, food packaging has high requirements for hygiene and environmental protection, and the recyclability and pollution-free nature of corrugated cardboard make it an ideal choice.
Electronic and electrical industry
Electronic and electrical products are usually more sophisticated and require good packaging protection. Corrugated cardboard can be customized according to the shape and size of the product, and its good cushioning performance can prevent electronic products from being damaged by vibration and collision during transportation. At the same time, the packaging of some high-end electronic and electrical products will also be beautifully printed on the surface of corrugated cardboard to enhance the image of the product.
Home building materials industry
In the home building materials industry, corrugated cardboard is used for packaging furniture, tiles, bathroom products and so on. For large furniture, corrugated cardboard can be made into large cartons to protect the corners and surfaces of furniture; For fragile tiles and bathroom products, corrugated cardboard can provide enough cushioning and support to prevent the product from breaking.
Logistics express industry
With the rapid development of e-commerce, the demand for corrugated cardboard in the logistics industry has increased sharply. Corrugated cardboard boxes are the main form of logistics express packaging, its characteristics of light, strong, low cost, suitable for various sizes and weights of goods packaging, to ensure the safe transportation of goods at the same time, but also easy to logistics operations and reduce costs.
