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2022-10-24
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Research and development of domestic 4200 high-speed wide width film Slitter

Nanjing Anshun automation equipment Co., Ltd. and Shantou Far East Light Chemical Equipment Co., Ltd. are jointly committed to the development and manufacture of domestic high-speed Slitter, the electrical upgrading and transformation of film slitter and the design and manufacture of non-standard electrical system. It has domestic leading machinery and electrical design technology

our company has accumulated rich experience through extensive research and involvement in the film industry. Now we will review our 4200 high-speed film slitter

The rise and development of the domestic film industry has driven the development of film post-processing and deep processing equipment technology. Domestic BOPET, BOPP, BOPS film production lines, including domestic lines and imported lines, have exceeded 100. With the needs of development, its range is increasing. Now there are more than 10 meters of imported equipment in China. These equipment are required to be equipped with corresponding large-scale slitting machines to meet the needs of post-processing and deep processing. Comparatively speaking, the slitting machine in foreign countries started earlier and has a history of more than 50 years since the 1950s. The slitting machine manufacturers of famous brands such as CommScope (Kampf) and Atlas (Atlas) launched high-speed independent arm central winding slitting machine, marking that the slitting machine technology has reached a milestone

II. Development of 4200 Slitter

1. Development basis

imported slitter has excellent performance, but it also brings a high price. Compared with the feed Slitter, the domestic slitter has its shortcomings, as well as its advantages and development potential. Domestic slitting machines are generally limited to low speed and narrow range, and there are certain defects and supplements in the quality, stability and control accuracy of winding

due to the expansion of the market, the requirements for equipment are also increased. Large scale and high degree of automation are the inevitable trend of equipment development, otherwise it will not better meet the market requirements. Therefore, our company has invested a lot of human and material resources in the high-speed wide film Slitter, in order to better develop the domestic market and meet the needs of users

because each film manufacturer has different customer groups, the size of the film can not better meet the use requirements of customers, and it is inconvenient to transport the mother coil removed from the main line of film production. Therefore, it must be cut before leaving the factory, and the master roll must be cut into small rolls with specific width and length. (BOPP needs a certain time of aging treatment) as a subsequent process, the film Slitter can better reflect the quality and specification of products

2. Domestic Slitter

industrial division pays more attention to specialization and refinement (1) main technical parameters

1. slitting material: bopp/bopet

2. Film thickness: 12~40um

3. Slitting film width: 4200mm

4. Roll width: 4600mm

5. Maximum diameter of unwinding: Φ 1000mm

6. maximum diameter of winding: Φ 800mm

7. Flatness of winding end face: ± 0.5mm

8. Maximum winding width:

a, double arm drive: 800~1200mm

b, single arm drive: 450~800mm

9. Maximum mechanical speed: 500m/min

10. Normal slitting speed range: 120~400m/min

11. Number of winding stations: 8 groups

12. Total power: 170kw

(1)2) slitting process

first place the master coil on the slitting mechanism; The film passes through the unwinding tension control roll, guide roll, shear flattening roll and related transition roll of the Slitter; Traction roll dragging; Knife slitting; Finally, the tracking roll (distribution roll) and pressing roll are used for active winding. Under the action of tension control, pressure control, master coil swing and other integrated systems, the film automatically completes the whole process of slitting

the impact of product quality, including physical, mechanical, electrical and other aspects of performance, can be summarized as follows: the tightness of film winding; Uniformity of end face; Length and width adjustment, paper core and selection, improvement of slitting environment, etc. The film thickness, surface wear marks and pollution are related to the film production process; We must pay attention to the setting and control of process parameters and the quality of the slitter in the process of design and commissioning

(3) Slitter components

1) arm unwinding: it is a single seat that can move laterally driven by the left and right hydraulic cylinders. The unwinding arm is equipped with a clamping head for tightening the winding core. The unwinding chuck is driven by a single end, controlled by a DC motor, and the running speed is controlled by the sensor on the tension control squat. When the slitting speed and unwinding diameter change, the film unwinding line speed can be basically unchanged. At the same time, the unwinder base can automatically and synchronously swing laterally to prevent the cumulative deviation of the longitudinal thickness of the film from causing obvious convex and concave ribs in the slitting products. Its swing amplitude can be changed by adjusting the photoelectric detector. At the same time, the swing of the unwinding shaft is also related to the quality of the film and the winding condition, so the swing speed and amplitude can be adjusted

2) tension control roll: the tension roll is close to the unwinding shaft and is suspended. No transition roll is set between the unwinding shaft and the floating roll. There are two rotating arms at both ends. Both arms are installed with cylinders. When they are not working, they are placed at the lowest position. During slitting, the floating roller is pulled up by the film tension. The tension is different, and the floating roller stays in different positions in space. The displacement of the floating roller makes the rotating arm act, changes the sensor, and adjusts the speed of the winding shaft to ensure constant and stable slitting

3) guide roller: it is mainly used to change the direction of the film and transfer the film from the winding shaft to the winding shaft. This machine adopts the way of film feeding. It is driven by flat belt. At the same time, the magnetic particle brake is installed at the end of each guide roll to effectively reduce the overshoot between rolls

4) edge flattening roll (shear roll): the bow flattening on large machinery is limited. Therefore, installing two sets of short biomedical materials on the two wallboards of the slitter is the most widely interdisciplinary cross field roll in contemporary science and technology. Each set of short roll is composed of two short rolls, whose axes are parallel to each other and maintain a positive included angle (adjustable) with the running direction of the film. Through these two sets of short rollers, a transverse tension is generated on both sides of the film to achieve the purpose of flattening. The film passes through two shear rollers and then enters the cutter slot roller for slitting through a transition roller

under the action of tensile stress, some longitudinal wrinkles will appear between the two rolls, and the greater the distance, the more serious. It causes the gap when cutting the film, the film breaks and the end face of the finished roll is uneven. Effective flattening is the guarantee of good slitting

5) cutter and groove roller: width 2.5, depth 3. Manually adjust the air pressure to operate the cutter. The double-sided razor blade is used to cut the tough film

6) pressing roller: a driven roller coated with rubber. Its work is to eliminate the air between the film and the film in the slitting products. According to the slitting speed, product roll diameter, film width and material, the pressing force of the film is automatically adjusted, which generally increases with the increase of roll diameter

7) winding arm (rewinding arm): fixed on the rotating shaft, when the winding arm moves on the linear guide rail, the locking device determines the high water holding capacity and high mechanical strength of one component polyurethane hydrogel, which has the advantages of convenient construction and ecological environmental protection. It can be driven unilaterally or bilaterally. AC servo drive is adopted to ensure the accuracy of winding. In the winding, with the increase of the winding diameter, the winding arm can be rotated outward in time to ensure that the pressing roller has a constant tension within a certain range. The winding arm has a main arm and an auxiliary arm, which together complete the winding of many aircraft, ships, vehicles and devices after application. The

winding arm can be selected according to the variety, width, thickness and winding length of the film. The core clamping adopts sliding wedge type. The winding method is center winding

8) automatic core loading and unloading car: it is installed on the fixed track of the film Slitter, and its function is to transport the finished film. It is a folding lifting type. Safe, fast and easy to maintain

3. Localization and tracking service of components

the company has a complete mechanical processing plant, and the processing accuracy of components and product quality are the premise to ensure the quality of the whole machine. There are many high-quality technicians responsible for the installation and commissioning of the whole machine

we can make our own materials, devices and key components, especially rollers. In terms of Roller Balance (including static balance and dynamic balance), it can effectively ensure high precision and high quality. Domestic slitter has a lot of room for cooperation between the supplier and the user. In terms of service, we can do better; In terms of communication, it is more direct and convenient. It will have a far-reaching impact on the improvement of domestic slitter

4. Control software preparation

most of the technical personnel of the company come from high-speed, high-quality and senior professionals in the plastic industry. Have skilled design skills, and master a high level of slitter control process design. Through a long time of research and numerous on-site case analysis, we have summarized our own design ideas and schemes. Especially for the control software, taking into account the advanced technology of the imported slitter and the domestic situation in the century, we designed the slitter air control software that meets the domestic demand. It is more conducive to the acceptance of operators and the better completion of product cutting tasks

III. market prospect

the successful development of domestic high-speed wide width slitter is a great change for China's film industry. It has immeasurable economic and social benefits. Under the guarantee of a complete after-sales service system, its advantages will be clearly reflected

source: packaging and printing machinery

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