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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 slitting machine

1. Development basis it is understood that the imported slitting machine has excellent performance, but it also brings a higher 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 have also increased. Large scale and high degree of automation are the inevitable trend of equipment development. Vice Premier Ma Kai of the State Council takes the lead, 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 slitting machine

(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 to take the initiative. This kind of environmental protection material is mainly composed of plant cellulose nanocrystals. 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. Therefore, the floating roller is not equipped with the displacement of the sampling and holding circuit to make the rotating arm act, change the sensor, adjust the speed of the winding shaft, and 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, two sets of short rolls are installed on the two wallboards of the slitter respectively. Each set of short rolls is composed of two short rolls, the axes are parallel to each other, and a positive included angle (adjustable) is maintained with the film running direction. 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 good slitting

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