Slitting machine develops towards digitalization

With the continuous development of information technology, digital technology is playing an increasingly important role in different fields. The same is true in the packaging industry. After continuous progress in the technology of domestic film slitters, there are obvious breakthroughs in speed, width, control and comprehensive performance. Digitalization has also become an important direction for the development of domestic slitters.

Many packaging materials often go through multiple processes such as slitting-printing (or coating) -composite-slitting before being used for packaging items, but the cutting method in each slitting process is different, common slitting The methods are as follows: (1) cutting edges, cutting off the process margins reserved in the previous process, which are mostly used for processing of composite films and other materials; (2) cutting, slitting wide-width coils into multiple rolls of narrow specifications ; (3) Divide the roll, divide the large roll diameter material into several rolls of small roll diameter material, which is equivalent to rewinding and so on. These methods are sometimes mixed. No matter which process is used, the material after cutting should meet the corresponding technical indicators: size requirements (referring to the width and length of the cutting material, etc.) and quality requirements (flatness of the coil, Surface quality, etc.).

Manufacturing and purchasing qualified slitting equipment must not only meet these technical indicators, but also must consider the following two factors: operating efficiency, mainly including the working speed, stability and difficulty of machine operation of the equipment; economic performance, refers to the equipment The scope of application of materials, the processing limit size, as well as the price of equipment and energy consumption.

With the continuous development of packaging technology and the improvement of packaging grades, the performance requirements of packaging materials on packaging materials have become increasingly prominent, and many materials with special properties have appeared, such as aluminum coating with shading effect and high surface quality requirements. CPP film with high rate, multi-material composite film with high barrier performance, etc. The continuous application of various new materials promotes the rapid development of the flexible packaging market. The growth of market demand and the development of special application fields have made the requirements for packaging materials slitting higher and higher, as well as the requirements for slitting equipment. On the other hand, with the gradual promotion of automated packaging equipment in the packaging industry, such as food packaging, cigarette packaging, etc., these automatic packaging machines are very picky about the quality of the material after slitting, which gives the slitter to high-end , High-precision control has brought a broad space for development.

In the past, high-precision, high-speed cutting machines used by domestic enterprises were mainly monopolized by a few foreign manufacturers. Regarding the development of the domestic slitting machine, there is such an image metaphor in the industry: the early slitting machine has a simple structure, the speed is about 100m / min, and the mechanical friction method of winding tension is manual control, which is called "telephone" Later, after some transformations, the winding was controlled by means of clutches, etc., and the single motor controlled the traction and winding, and the speed was below 200m / min. It was called "simulator"; after that, the new automatic high-speed cutting machine was used. Digital automatic control, speed above 300m / min, just like "digital machine" in modern communication field.

As the technological capabilities of domestic enterprises have improved, different manufacturers have launched digitally controlled high-speed slitters. The following introduces the high-speed digital control slitting machine produced by several domestic manufacturers and gives a glimpse of the latest progress of the domestic slitting technology.

New concept of intelligent slitting

At the beginning of this year, Hangzhou Dahua Industrial Control Technology Co., Ltd. developed a product tailored for mainstream users in the flexible packaging industry-Little Prodigy II Slitting Machine. Little Prodigy II flexible packaging slitting machine series has absorbed many advantages of the previous Dahua slitting machine. It adopts the central winding method and the latest digital control and driving technology. The stable working speed is 300 ~ 400m / min, the unwinding diameter is 800mm, the winding diameter is 500mm, and the minimum winding width is 30mm. In addition, the film splicing station, waste edge treatment system, and cutter conversion system specially designed for this machine are all ingenious, and more optional solutions can meet the specific requirements of more customers. Digitally controlled man-machine dialogue system makes the operation more convenient. This cutting machine can cut PE, PP, PVC and PET film, paper and composite film. The entire design takes high speed, high efficiency, high precision, and high reliability as the basic requirements, so that customers can truly appreciate the excellent performance of high-quality, moderate-cost and cost-effective slitting machines.

Dahua Industrial Control has successively developed a series of digital slitting machines through continuous innovation. The series of slitting machines such as Xiaobawang, Ou Shen, and Little Wunderkind II are being used by more and more users. On the basis of digital slitter technology, a few days ago, Dahua Industrial Control has launched a new concept-intelligent high-speed slitter, a new generation slitter that is more perfect, more practical and more powerful.

The intelligent high-speed cutting machine continues all the advantages of the previous Dahua cutting machine. On the basis of high speed, high efficiency and high reliability, the remarkable functions of the cutting expert are added, including: process expert function, operation expert function and after-sales Service expert function. The intelligent slitter solves the complex operation problem of high-end slitter. The intelligent introduction makes the performance of this new generation slitter tend to be perfect.

Process expert function: Dahua Industrial Control R & D personnel's film industry experience enables this function to be achieved. Through optimized parameters, one-click cutting is achieved. In short, just like a point-and-shoot camera, people without professional photography skills can take clear pictures. It makes the operation very easy to get started, so that people who are not familiar with the material can also complete the slitting and cut out the film with good quality. At the same time, the mode of setting parameters by users is reserved.

Operation expert function: This function gives the machine flexibility. Experienced operators can set parameters to meet the special slitting needs of some companies. It realizes the interaction between man-machine images and the effective communication between the operator and the slitter, which greatly reduces errors. , Essentially reduce the incidence of errors, so that the operation is methodical, as if the experts are around.

After-sales service function: Dahua Industrial Control realizes this function through a series of measures, accurately displays machine failures, facilitates maintenance and repair, and makes the machine operate efficiently. The intelligent high-speed cutting machine has the characteristics of convenient operation, high cutting quality and improved efficiency. Dahua Industrial Control has completed the above-mentioned technical upgrades, and provides the upgrade services of Dahua slitting machines to customers in need.

High-speed cutting technology

The traditional high-speed slitting machine refers to the speed above 300m / min, and the high-speed slitting machine used in China is between 300-400m / min. The cutting machine speed can be as high as 500m / min. This model integrates machine, electricity, light and gas, has high speed (up to 200-500m / min), complete specifications (600-2200mm), wide application (film, paper, aluminized materials, etc.) and high accuracy (Digital automatic control) and other significant features in one.

The electrical system of the machine is controlled by a full-computer PLC, equipped with a man-machine interface system (can carry out man-machine dialogue, set the cutting parameters and the display and monitoring of working status according to the cutting process requirements), and the PLC uses Mitsubishi programmable control of Japan The controller is combined with AD and DA to control the running state. According to the detection result of high-performance pulse generator and the change of setting parameters and winding diameter, the winding tension is automatically controlled according to the taper mode; the main traction and winding in the driving part are respectively adopted Two Japanese Yaskawa frequency converters with vector control function directly control the torque. The rewinding parts adopt imported air expansion shaft and clutch, combined with the adjustable pressure shaft structure to realize the digital automatic control of the high-end cutting machine. The unwinding part is composed of Mitsubishi's fully automatic tension control system, Mitsubishi's automatic photoelectric correction system, and hydraulic lifting mechanism. The loading structure is a shaftless clamping method, combined with a hydraulic lifting mechanism, which is convenient for loading and unloading, saves time and effort, and reduces labor intensity. The slitting knife has two structures: flat blade and round blade. The main electrical, pneumatic and standard parts are all imported famous brand products with stable and reliable performance. The price of the machine is only 1 / 3-1 / 5 of the imported equipment of the same level and level, and the performance price is relatively high.

The technical performance of the fully automatic high-speed cutting machine manufactured by Wuxi Beiren Xiemin Printing Machinery Factory has reached and surpassed the international advanced level of similar products in some aspects. After continuous research and development, the company has increased the working speed from 300m / min to 500m / min, and the machine specifications have been extended from 1300mm basic size to 600mm small size computer paper slitting to 2200mm wide material slitting.

There are still many domestic manufacturers developing high-speed automatic slitting machines, and their technology and reliability are constantly improving. The application of digital technology is becoming a typical feature of the development of high-speed automatic slitting machines.




Shantou Chenghai Sweet Baby Toys Firm ,