Summary of the development of paper cutters
We are a big printing company in Shenzhen China . We offer all book publications, hardcover book printing, papercover book printing, hardcover notebook, sprial book printing, saddle stiching book printing, booklet printing,packaging box, calendars, all kinds of PVC, product brochures, notes, Children's book, stickers, all kinds of special paper color printing products, game cardand so on.
For more information please visit
http://www.joyful-printing.com. ENG only
http://www.joyful-printing.net
http://www.joyful-printing.org
email: info@joyful-printing.net
The paper cutter is a commonly used paper processing equipment that has been used in production for hundreds of years. It is mainly used for the cutting and processing of sheet paper in paper mills, the cutting of pre-printed sheets of printing enterprises and the processing of post-printed prints, and the cutting of paper honeycomb cores in packaging products. In recent years, paper cutters have been widely used in the cutting of non-paper materials such as trademarks, self-adhesive patches, cards, and even PS plates, leather, and hard plastics. In the family of printing machinery products, paper cutters play an important role, with annual sales being second only to small lithographic presses. With the development of social economy and the advancement of science and technology, the social demand of paper cutters has been increasing, and its own high-tech content has also increased significantly.
First, the structural characteristics of the paper cutter
Although the paper cutters are of various types, their structures are basically similar, and they are composed of the following main components: a cutter, a knife blade, a paper cutting table, a side gauge, a rear gauge, a paper press, and a machine base. The cutter is an important part of the paper cutter. The cutter is long and heavy in front of the machine, fixed on the knife holder, and performs the cutting work when it moves toward the base. The angle and material of the blade are selected and adjusted according to the characteristics of the material being cut. The blade is another important part of the paper cutter, located in a groove on the cutting table, just below the cutter. The function is to prevent the cutter from colliding with the metal paper cutting table after cutting the paper stack every time, otherwise the cutting knife is easily blunt or even broken. The purpose of the side and rear gauges is to adjust the position of the stack before cutting to accurately position the stack below the cutter. The side gauges are fixed and the rear gauge can be moved and can be adjusted according to different cutting lengths. The platen is a metal block parallel to the cutter. It has two functions: to discharge the air in the stack before cutting; to secure the stack firmly in place during the cutting process. The paper cutting table is the work table of the paper cutting machine, which requires high flatness, straightness precision, and good rigidity to ensure the smooth progress of paper pushing and cutting to ensure the cutting precision.
Second, the development status of foreign paper cutters
The most famous Polar cutting machine among many international advanced paper cutters represents the development direction of the paper cutter. Other brands such as WOLLENBERG, SCHNEIDER, UK's CHELLENGE, and Japan's Ito also have their own advantages. Here, the model of Polar company is taken as the representative to explain the development history of foreign paper cutters.
1. Mechanical paper cutter
The earliest paper cutter is a mechanical paper cutter. It adopts a single rail structure, which has a simple structure and convenient debugging and maintenance. However, this type of paper cutter has no high-precision size positioning system and size setting device, and the cutting precision is low, which cannot be satisfied. Requirements for cutting high-end prints. In addition, the paper cutter has large impact force, high noise, unreliable safety mechanism, easy work accidents, and no automatic paper feeding mechanism, which has high labor intensity and low production efficiency. This model has now been eliminated.
2. Hydraulic paper cutter
After the mechanical paper cutter, the hydraulic mechanism was introduced into the paper cutter to design a hydraulic paper cutter. The hydraulically driven paper press has a large and constant pressure and is less affected by the impact force when cutting. Some cutters of the paper cutter are also hydraulically driven, and the cutting is accurate and stable.
3. Digital display and program-controlled hydraulic paper cutter
With the development of cybernetics and electronic technology, digital display and program-controlled hydraulic paper cutters have become the mainstream of paper cutter development. In 1956, Bora produced the first tape-controlled paper cutter, opening the way in the design of the program-controlled paper cutter. Since 1997, the German company Polar has exhibited new models almost every time at international exhibitions. From the basic Polar E-type programmable paper cutter, the first Polar EM paper cutter with microcomputer control was quickly developed, and a Polar ED paper cutter was introduced. This also introduces the all-hydraulic digital Polar 66 paper cutter for the booming short-running fast-print market.
The Polar E-type paper cutter is a programmable model for general cutting operations with a 128 KB storage capacity, which is equivalent to approximately 12,000 cutting positions. The Polar ED Cutter offers users a variety of additional features including Autotrim, which automatically removes scrap during high-speed cutting, saving up to 30% of the time. At the same time, the label can be pre-organized on the support plate, and even the smallest label can be processed quickly and efficiently. The front table can be stretched according to the size of the cut. The pressing device at the front of the cutter fixes the small-format label on the front of the cutter to prevent the label from being mixed, moved or turned over, which improves the workflow and increases productivity. The model is also equipped with programming software for programming operations outside the machine and is networked with the data control system. It also features high-precision measurement and positioning systems, including direct pulse generators, frequency-controlled drive motors, high-precision spindles with universal ball bearings, and precision linear guidance systems for pushers. Rotate the rear gauge or tilt the rear gauge to align the stack of paper that needs to be cut. The positioning device (Fixornat) ensures that the paper is fixed under the cutter, just like the positioning on the press. The guide gauge plays a role throughout the machining process until the cutting is completed. The cutting position positioning accuracy is 0.01mm, and the maximum speed of the paper feeder is 30m/min. This model's automatic pressure regulator ensures optimum pressure on all papers at all cutting widths. This speeds up the cutting process (no need to manually adjust the pressure) and maintains a consistently high quality cut. The cutting optimization function optimizes the cutting action of the cutter and the movement of the rear stop, especially in the case of a small paper feed depth, because the rear gear moves forward earlier and the production efficiency is improved. At the Drupa2000 exhibition, Bora has proposed seven cutting system solutions for the user based on the Polar ED paper cutter. It is an efficient networked cutting system that combines high-speed paper cutters and auxiliary equipment. The Polar ED paper cutter is also equipped with a variety of safety devices to make the machine extremely safe, in compliance with European CE safety standards and German GS safety standards. The platen and paper cutting of the Pola 66 paper cutter is fully hydraulic and digital control. The machine can store 99 sets of paper cutting programs, 6464 program steps, safe and rapid tool change and adjustment, and high precision of the paper feeder. The cutting motion trajectory is optimized, the cutting is smooth, and the cutting precision is high.
All of the above models are modular in design, and the graphical buttons on the control panel make it easy to see at a glance. High-resolution color screen display with 29 types of text operation information. When the cutting material changes or deforms, the corresponding correction function can be used to correct the paper size error. The self-diagnostic system continuously monitors all functions of the paper cutter. If there are any errors or abnormalities, there will be a signal and text display immediately, so that the operator can eliminate the fault as soon as possible.
Polar successfully applied the PCM-Polar control management system to the external network management of high-speed paper cutters and paper cutter systems, and in 2004 it was deployed to 80% of the company's large high-speed paper cutters. The PCM-Polar control management system has many advantages, such as automatic generation of the cutting program; the camera controls the rear table of the paper cutter to position and align the material to be cut; and has a video conference with the agent and the manufacturer at the service center. Electronic diagnostic interface; can use the Internet to download the paper cutter upgrade software; can use the pre-press processing information and data control system to realize the internal networking of the paper cutter through the integrated CMMPUCUT software. Today, Polar's next-generation paper cutters use liquid crystal display and microcomputer control to automatically program and control the operation and speed of the cutting process. Its latest Polar-X and XT paper cutters are heavier and stronger than the E and ED products. Its 78mm and 92mm paper cutters have a deeper front, and there is a new cutter replacement and adjustment system called Optiknife that allows the operator to adjust the blade at a lower cutting position, making the blade replacement even more Simple, the life of the knife has been doubled. In addition, the smarter P-NET technology provides full Ethernet connectivity, which means it can be used as a central server to automatically set up peripherals such as the pickup.
4. Cutting production line
In addition to the development of microcomputer-controlled paper cutters, many foreign manufacturers have also developed cutting production lines of various specifications to meet different production needs. For example, the Pola cutting production line in Heidelberg has different specifications such as L-137-L, L-R-137-T, T-155-T and L-R-P-137-T. This cutting production line combines various operating procedures, such as raising, lowering, filling, squeezing, buffering, cutting, conveying, unloading, etc., into an automatic control program to automate the entire production process. For example, the Pola L-R-137-T cuts the production line, and the operator simply places the paper to be cut on a sloping crepe table, and the rest is automatically done by the system. First, the paper table surface vibrates to make the paper align, and then the table top rises to align with the paper cutter table, and the paper is conveyed to the paper cutter. The paper cutter automatically cuts the paper according to the specified size, and the cut paper is further cut. The transfer station is automatically transported to the unloading device Transomat E and the entire cutting process is fully automated.
Third, the development of domestic paper cutters
The Shanghai Shenweida company Feida brand paper cutter and the Litong brand paper cutter of Sichuan Zhongjiang Litong Company represent the development level of domestic paper cutters. The two companies no longer produce backward mechanical paper cutters, but hydraulic cutters, program-controlled paper cutters and microcomputer-controlled paper cutters are the mainstream products at this stage.
1. Shenweida Feida series paper cutter
Shenweida Feida brand paper cutter is a mechatronics product integrating machine, electricity, light, liquid, gas and digital technology. It is controlled by computer processing and position detection device. Its main features include: modular design, component standardization, design generalization; paper press uses hydraulic drive to achieve stepless pressure regulation, pressure is large and constant; using Internet network technology, Chinese and English choice of human-machine dialogue interface, to achieve Remote fault monitoring and diagnosis; PLC control, RS485 interface for communication; when the system has a fault alarm, the system automatically pops up the fault name and suggested processing method; using advanced ball screw and linear guide structure to make the paper feeder run smoothly and briskly The positioning is accurate, the noise is low, and the cutting precision is improved; the worktable is all chrome-plated with air cushion, so that the worktable is wear-resistant, does not rust, pushes the paper briskly; in terms of safety protection, there are two-hand linkage protection button, infrared photoelectric protection Safety guards such as electronic locks ensure the safety of operators and equipment; they can be cycled for single cutting, with overload protection during cutting, and the tool change is light and convenient.
The company's SQZK program-controlled paper cutter is a typical representative of the highest level of domestic paper cutters. Its appearance, function, safety and stability have reached the international mid-1990s level. The machine's control system uses a 10.4-inch color display, floppy disk drive, storage capacity is huge. It can carry out cutting data transmission or software upgrade; visualization function of cutting table and cutting line; paper stack height monitoring device and knife sensing device reduce paper cutting travel time; paper feeder and wire The rod nut seat adopts the internationally mature rigid connection technology, and there is no relative displacement between the two when the paper is adjusted; the new solution of the single spherical support instead of the double spherical support of the pusher and the screw nut holder increases the push. The supporting area of the paperboard impact resistance improves the impact resistance and stability, so that the cutting precision can be maintained for a long time; the automatic paper pressing valve is arranged so that the paper pressing force can be minimized without affecting the cutting, and will not Indentation on the soft cutting material, optional solenoid valve, with KM large-screen control system to achieve the paper pressure control program; optional waste side removal device on the 115 cm size model, When the paper presser presses the paper, the front plate moves forward, so that the waste edge falls into the waste paper box when cutting, and then the rear front plate and the rear plate are closed again, so that the cutting site is clean and organized; the cutting monitoring is adopted. Device, PL C programmable controller, contactless sensor switch, platen brake and other technical measures, as well as the optional selection of CE-compliant infrared photoelectric devices, electrical components and moving parts and enclosures in hazardous areas. Safety protection and passed the European CE certification.
Feida brand paper cutter is also the first in the domestic paper cutter to be equipped with a series of auxiliary machines, such as elevators, rake machine air cushion workbench, unloader. The paper cutter with a specification of 1150mm or more can be equipped with an automatic clearing device. The program-controlled machine with a specification of more than 1150mm can form a cutting production line, which can automatically complete the loading, unloading, sorting, handling and stacking of paper. The single machine can also be combined arbitrarily.
2. Zhongjiang Litong Litong brand paper cutter
The Litong brand paper cutters of Sichuan Zhongjiang Litong Co., Ltd. also have many improvements. The “double-rail overall slotless workbench” uses two guide rails on the two sides of the platform to guide, which improves the rigidity of the workbench and makes the displacement of the pusher after collision.
Fourth, New ideas for the cutting process of the paper cutter
From the above discussion of the development of the paper cutter, it can be seen that with the advancement of technology, the paper cutter has undergone tremendous changes: from the original mechanical development to the hydraulic paper cutter, to the program control machine, and then The intelligent paper cutter that has developed into liquid crystal display and microcomputer control has begun to develop into an automatic paper cutting production line composed of various auxiliary machines with the intelligent paper cutter controlled by microcomputer as the core. This greatly improves the cutting precision and efficiency of the paper cutter. On the other hand, it can also be seen that in order to make the machine run stably, especially to reduce the impact of the large cutting resistance impact, the machine is designed to be large and heavy, and the machine energy consumption is also large, which is mainly its cutting. There are no reasons for substantial changes in the organization. In order to solve the problem that the traditional paper cutter has large cutting resistance during the cutting process, it is easy to produce the "sickle" failure and the blade wear is serious. Since 2005, Professor Zhang Guangzheng and Professor Wu Jimei of Xi'an University of Technology have broken through the traditional cutting process. The limitations of the study of the vibration cutting process. The process is characterized in that during the cutting process of the paper, a slight vibration is applied to the cutting movement of the knife bed, thereby alleviating the one-time impact and excessive cutting resistance of the knife bed when the cutting machine is cut. Through the construction of the vibration cutting test platform, the test analysis found that the introduction of vibration can reduce the cutting resistance, alleviate the impact, make the machine work smoothly, improve the cutting quality of the paper, and reduce energy consumption and save. The material, which reduces the tipping moment of the blade, provides a new idea for the design of the paper cutter.