A printing / coating device

Abstract

The present invention relates to the technical field of printing or coating, and particularly relates to a printing / coating device, which includes an unwinding device, at least two groups of printing / coating devices, a post-drying device, a plurality of rollers, and a winding device for winding up the coil material. A turning roller is provided at least on the last group of printing / coating devices. The coil material released by the unwinding device enters the post-drying device for drying after being turned by the turning roller of the last group of printing / coating devices, and then is wound up by the winding device. The rollers from the first group of printing / coating devices to the post-drying device are located on the same side of the non-printing surface of the coil material. Between the printing / coating device and the post-drying device, the non-printing surface of the coil material contacts the rollers to limit quality problems such as dragging of the printing surface of the coil material and stretching and misregistration of the coil material due to excessive drying, thereby improving the quality, production speed, and efficiency of the product.

Description

Technical Field

[0001] The present invention relates to the technical field of printing and / or coating, and particularly to a printing / coating device. Background Art

[0002] Printing and coating equipment is commonly used in the printing and packaging industry. The printing / coating equipment in the printing and packaging industry is mainly rotary (for printing and coating on coils). The structures of traditional printing / coating equipment include satellite type, stack type, and modular type.

[0003] For modular printing equipment, since it is necessary to perform complete drying after each color group is printed (the guide roller will contact the printing surface during printing), and in addition, due to the long length, large floor area, high energy consumption, and many quality problems caused by drying of modular printing equipment, it is not conducive to popularization and use.

[0004] Due to the limitations of the feeding and discharging characteristics, position, and angle of satellite and stack printing equipment, the number of printing and coating color groups that can be arranged on the color seat is limited. Generally, only 6 - 8 color groups can be installed on each color seat. Otherwise, it will affect the drying of the coil, the installation position and circumference of the printing / coating roller of the coil, and the operation convenience of the printing / coating equipment, etc. To solve the above problems, it is necessary to significantly increase the equipment investment.

[0005] When more color groups are needed, the current method is to increase the installation of color seats; due to the limitations of the feeding and discharging characteristics, position, and angle of satellite and stack types, the traditional solution is: after the coil is printed and coated by the first color seat, it must be dried (completely dried) before entering the next color seat (see attached Figure 1 ), which not only increases the length of the coil feeding, significantly increases the waste rate, but also the guide roller will contact the printing surface during printing and coating, thus affecting the quality of the product; generally, the ink and coating on the coil must be completely dried to ensure that the coil is not smeared; but because it needs to be completely dried before entering the next color seat, it will cause the coil to expand and contract due to excessive drying (exceeding the critical point of the coil's expansion and contraction deformation), resulting in inaccurate printing and coating overprinting, and the existing automatic overprinting device cannot solve the overprinting problem caused by the coil expansion and contraction. Therefore, it restricts the development of overprinting accuracy and multi-color printing.

[0006] Therefore, traditionally, it is more inclined to install as many color groups as possible on the same color seat (the number is still very limited), but this causes other drying problems, such as the distance between color groups is too short, the production speed, production efficiency, and the length of the printing / coating drum are limited, and the operation is inconvenient, etc. The practical performance of the equipment is severely limited. To balance the above disadvantages, the equipment becomes more complex, larger, and more expensive, but the final problem still cannot be completely solved.

[0007] Due to limitations in feeding and discharging characteristics, position, and angle, satellite and stacked printing equipment must be completely dried before entering the next color station to avoid scratching the printing surface of the roller. Referring to the existing Chinese utility model patent with the publication number CN207942799U, which discloses a ten-color combination intaglio printing press. When the coil moves from the first impression cylinder to the second impression cylinder, if the coil is not completely dried, when the coil enters the color group of the second impression cylinder, the printing surface of the coil will inevitably come into contact with the guide roller and the plate cylinder, and will be scratched by the plate cylinder, affecting product quality and production efficiency. In severe cases, all products will become scrap. Therefore, a drying device must be installed between the first impression cylinder and the second impression cylinder. The dried coil by the drying device will undergo shrinkage and deformation (the product length is no longer the standard length of the original plate cylinder), resulting in inaccurate overprinting of the coil on the second impression cylinder. Coupled with the satellite layout, due to limitations in feeding and discharging characteristics, position, and angle, there is simply not enough space on the second impression cylinder to reasonably arrange drying and winding, and it also inevitably increases the operation difficulty.

[0008] Due to the national policies of environmental protection, recyclability, and sustainable development, it is the general trend to reduce tree felling, promote recycled paper, and use water-based inks and coatings for printing and coating. However, recycled paper has short fibers and uneven shrinkage. Moreover, water-based inks and coatings are not easy to dry. After being wetted by water-based ink and coating and then dried during the printing and coating process of recycled paper, its shrinkage is uneven, resulting in more overprinting problems during the printing process, increasing the scrap rate and reducing the printing speed and accuracy.

[0009] The present invention proposes a brand-new printing / coating equipment, which addresses the above problems and fundamentally solves them, and can increase the color stations without limit as needed. Compared with the existing web-fed printing equipment, it has the advantages of broadening the product / process range, improving the printing quality and grade, producing at a higher speed, more efficiently and stably, saving energy, reducing the scrap rate, and significantly reducing the production cost. Summary of the Invention

[0010] The purpose of the present invention is to provide a printing / coating equipment that is inexpensive, convenient to increase color stations, and flexibly arranged. A turning roller is provided in the printing / coating device to facilitate the coil to turn to another printing / coating device or drying device through the turning roller, which is beneficial to increasing the color gamut, thereby preparing more exquisite products. The distance between adjacent color stations and the coil between color groups are shortened, thus effectively reducing the scrap rate.

[0011] The above object of the present invention is achieved by the following technical solutions:

[0012] A printing / coating device, comprising an unwinding device, at least two groups of printing / coating devices, a post-drying device, several rollers, and a winding device for winding up the coil material. At least one turning roller is provided on the last group of printing / coating devices. The coil material unwound from the unwinding device enters the post-drying device for drying after being turned by the turning roller of the last group of printing / coating devices, and then is wound up by the winding device. The rollers from the first group of printing / coating devices to the post-drying device are located on the same side of the non-printing surface of the coil material.

[0013] By adopting the above technical solution, the coil material is turned by the turning roller at the last printing / coating device to prevent streaking of the coil material on the printing / coating device. On the other hand, according to the arrangement of the printing / coating devices, only by adding turning rollers between each printing / coating device and allowing the coil material to be turned by the turning roller before entering the next printing / coating device can the color gamut of the printing / coating device be increased. In this way, no matter how many printing / coating devices are added, since the coil material is turned by the turning roller, the printing surface can be kept from contacting any roller. The rollers from the first group of printing / coating devices to the post-drying device are located on the same side of the non-printing surface of the coil material. The non-printing surface of the coil material between the printing / coating device and the post-drying device contacts the rollers, which is beneficial to improving the printing / coating quality of the coil material and thus improving the product quality. There is no post-drying device between two adjacent groups of printing / coating devices. On the one hand, the deformation of the coil material is reduced, the overprint accuracy is improved, which is beneficial to printing high-quality products; on the other hand, the cost of the printing / coating device is reduced, which is beneficial to improving the market competitiveness of the printing / coating device. During the actual operation of the printing / coating device, the loss is reduced, energy is saved, the cost is reduced, and the speed and efficiency are increased, which is beneficial to improving the overall economic efficiency and market competitiveness.

[0014] The present invention is further configured such that: the turning roller forms an adjustable angle with the axis of the printing / coating device, and the angle formed by the turning roller and the axis of the printing / coating device is preferably 45°.

[0015] By adopting the above technical solution, the turning roller forms an adjustable angle with the axis of the printing / coating device to facilitate the turning of the coil material by the turning roller, thereby enriching the path of the coil material on the printing / coating device; the angle formed by the turning roller and the axis of the printing / coating device is preferably 45°, so that the coil material is vertically turned by the turning roller, thus avoiding the contact between the printing surface and the guide roller and maintaining the product quality of the coil material.

[0016] The present invention is further configured such that: one or more turning rollers are provided, and the turning roller is located between two groups of printing / coating devices; and / or the turning roller is located between the printing / coating device and the unwinding device; and / or the turning roller is located between the printing / coating device and the post-drying device; and / or the turning roller is located between the post-drying device and the winding device.

[0017] By adopting the above technical solution, the coil material is turned by turning rollers between two groups of printing / coating devices, between the printing / coating device and the unwinding device, between the printing / coating device and the post-drying device, and between the post-drying device and the winding device, thereby enriching the layout modes of the printing / coating equipment, making the layout of the printing / coating equipment more flexible, and reducing the requirements for the site of the printing / coating equipment layout.

[0018] The present invention is further configured that: the turning roller forms an adjustable angle with the axis of the printing / coating device, and the angle formed by the turning roller and the axis of the printing / coating device is preferably 45°.

[0019] By adopting the above technical solution, the coil material is vertically turned by the turning roller, enriching the path of the coil material in printing / coating, thereby enriching the layout modes of the printing / coating equipment.

[0020] The present invention is further configured that: the roller includes an inlet roller, the inlet roller is located between two groups of printing / coating devices, and the coil material is introduced into the printing / coating device through the inlet roller.

[0021] By adopting the above technical solution, the coil material is introduced into the printing / coating device through the inlet roller between two groups of printing / coating devices, enriching the way for the coil material to enter the printing / coating device.

[0022] The present invention is further configured that: the unwinding device, two groups of printing / coating devices, the post-drying device and the winding device are at least arranged on two axes.

[0023] By adopting the above technical solution, the layout modes of the unwinding device, two groups of printing / coating devices, the post-drying device and the winding device are enriched, thereby enriching the layout modes of the printing / coating equipment, breaking through the setting that traditional printing equipment must be arranged on the same axis, that is, breaking through the setting that the coil material path of traditional printing equipment must be on the same axis.

[0024] The present invention is further configured that: the post-drying device and / or the winding device are arranged perpendicular or parallel to the axes of two groups of printing / coating devices.

[0025] By adopting the above technical solution, the layout modes of the post-drying device, the winding device and the printing / coating device are enriched, thereby enriching the layout modes of the printing / coating equipment, making the layout modes of the printing / coating equipment more flexible, and thus reducing the requirements for the site of the printing / coating equipment layout.

[0026] The present invention is further configured that: the turning roller includes a guide roller and / or an air shaft.

[0027] By adopting the above technical solution, the turning roller can be one of a guide roller or an air shaft, or can be a guide roller and an air shaft.

[0028] The present invention is further configured such that: the printing / coating device includes a color base and a plurality of color groups arranged on the color base; the plurality of color groups are preferably arranged symmetrically or asymmetrically on the color base; the plurality of color groups on the color base are preferably arranged in a bookshelf type, satellite type, and / or modular type.

[0029] By adopting the above technical solution, the ways of arranging the color groups on the color base are enriched, so as to arrange the color groups on the color base in a suitable way according to actual needs.

[0030] The present invention is further configured such that: the material receiving device includes a winding mechanism and / or a cutting / folding material receiving mechanism.

[0031] By adopting the above technical solution, the winding mechanism corresponds to the unwinding device, so as to facilitate the winding mechanism to wind up the coil material released by the unwinding device; the cutting / folding material receiving mechanism cuts the coil material released by the unwinding device, and then receives the material by folding it into single sheets or multiple sheets.

[0032] In summary, the beneficial technical effects of the present invention are as follows:

[0033] 1. During the printing / coating process, the printing surface does not come into contact with the roller, so there will be no smudging and it will not affect the printing / coating quality;

[0034] 2. After the entire printing / coating process is completed, it enters the post-drying device (fully dried), fundamentally eliminating quality problems such as coil material shrinkage and inaccurate overprinting caused by excessive drying during the printing process;

[0035] 3. Because only local and incomplete drying is required during the printing / coating process, the production speed can be increased several times and the energy consumption can be reduced. The flexographic printing speed of 350 meters per minute advocated by the country can also be easily achieved;

[0036] 4. Shorten the distance between the color base and the color groups, greatly reduce the material loss during the overprinting process, and reduce the waste rate;

[0037] 5. The number of color groups can be doubled by increasing the number of color bases, improving the printing / coating process. By increasing the product color gamut, coating amount, coating times, etc., higher-end and more colorful products can be produced, and the scope of application is greatly increased;

[0038] 6. The unwinding device, printing / coating device, post-drying device, material receiving device, etc. are arranged on at least two axes, facilitating the flexible arrangement of the printing / coating equipment according to the production site;

[0039] 7. By concentrating and shortening the total length of the entire printing / coating equipment, it makes it easier and more convenient for the operator to operate;

[0040] 8. Solving the problems of overprinting and unstable quality at the source can not only simplify the design and reduce the equipment cost, but also lay a stable foundation for the digitalization and intelligentization of equipment and the efficient acceleration of production.

[0041] 9. Based on the above, the benefits of the enterprise are greatly improved.

[0042] 10. The present invention greatly expands the application scope of environmentally friendly recycled paper and environmentally friendly water-based inks / coatings. Coupled with high efficiency and low energy consumption, it contributes to environmental protection and significantly increases social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is a schematic structural diagram of a traditional printing device;

[0044] Figure 2 is a schematic structural diagram of the present invention;

[0045] Figure 3 is a top view of the present invention;

[0046] Figure 4 is a top view of the present invention;

[0047] Figure 5 is a top view of the present invention;

[0048] Figure 6 is a top view of the present invention;

[0049] Figure 7 is a top view of the color seat and the turning roller of the present invention.

[0050] In the figure, 1 is a frame; 2 is an unwinding device; 3 is a rewinding device; 4 is a printing / coating device; 41 is a color seat; 42 is a color group; 421 is a printing cylinder; 422 is a printing roller; 423 is an arm; 5 is a roller; 51 is a turning roller; 52 is a guiding roller; 53 is an introducing roller; 6 is a traction device; 7 is a post-drying device; 8 is a coil. DETAILED DESCRIPTION OF THE INVENTION

[0051] The present invention will be further described in detail below with reference to the accompanying drawings.

[0052] Referring to Figure 2 and Figure 3 , a printing / coating device disclosed by the present invention includes an unwinding device 2, a frame 1 and a rewinding device 3. A traction device 6, at least two groups of printing / coating devices 4, a post-drying device 7 and several rollers 5 are arranged on the frame 1;

[0053] Among them, the unwinding device 2 and the winding device 3 are located outside the frame 1, and the unwinding device 2 and the winding device 3 are located on both sides of the two groups of printing / coating devices 4. The unwinding device 2, the traction device 6, the two groups of printing / coating devices 4, the post-drying device 7, another traction device 6, and the winding device 3 are arranged in sequence, so that the coil material 8 released by the unwinding device 2 passes through the traction device 6, the two groups of printing / coating devices 4, the post-drying device 7, and another traction device 6 in sequence and is wound by the winding device 3. The roller 5 includes a turning roller 51, and the turning roller 51 can be one of a guide roller and an air roller. The turning roller 51 is at least arranged on the last group of printing / coating devices 4. After the coil material 8 is turned by the turning roller 51 on the last group of printing / coating devices 4, it enters the post-drying device 7. On the one hand, it realizes the turning of the coil material 8 on the printing / coating device 4. On the other hand, it is convenient for the post-drying device 7 to dry the coil material 8, so that the winding device 3 can wind the coil material 8, thereby improving the quality of the coil material 8 after printing or coating, and thus improving the product quality. The rollers 5 from the first group of printing / coating devices 4 to the post-drying device 7 are located on the same side of the non-printing surface of the coil material 8, that is, the rollers 5 between the first group of printing / coating devices 4 and the post-drying device 7 are all located on the same side of the non-printing surface of the coil material 8, so that the non-printing surface of the coil material 8 contacts the roller 5 between the printing / coating device 4 and the post-drying device 7, and the printing surface of the coil material 8 does not contact the roller 5 from the printing / coating device 4 to the post-drying device 7, which is beneficial to improving the quality of printing or coating of the coil material 8; during the printing / coating process, the printing surface does not contact the roller, and there will be no dragging or affecting the quality of printing / coating. The setting of the traction device 6 is used to traction the coil material 8 on the one hand and adjust the tightness of the coil material 8 on the other hand.

[0054] The printing / coating device 4 includes a color base 41 and a number of color groups 42 arranged on the color base 41. The number of color groups 42 on the color base 41 can be arranged as needed, and the number of color groups can be arranged symmetrically or asymmetrically on the color base; preferably, the number of color groups 42 on the color base 41 is arranged in a bookshelf, satellite, and / or modular manner to enrich the arrangement of the color groups 42 on the color base 41. A local drying structure is provided between the number of color groups 42 on the color base 41. The local drying structure dries the web 8. However, the web 8 is not completely dried. The local drying structure is mainly used to preliminarily dry the ink or coating and fix it on the web 8 to limit the interference of the printed / coated ink or coating on the web 8, thereby improving the quality of the web 8 after printing or coating and improving the quality of the product. Among them, the web 8 includes a paper roll, a cloth roll, a plastic film, or other materials that can expand and contract due to drying. The web 8 is not completely dried between two printing / coating devices 4 (to avoid reaching the critical point of web expansion and contraction), reducing the deformation and shrinkage of the web 8, especially reducing the deformation and expansion of the paper roll, which is beneficial to improving the overprint accuracy between the color groups 42 on the color base 41 of the web 8, especially the overprint accuracy between the color groups 42 on the color base 41 of the paper roll, so as to produce a better-quality product;

[0055] The color group 42 includes an impression cylinder 421 arranged on the color base 41, an arm 423 arranged on the color base 41, and a printing cylinder 422 arranged on the arm 423. Among them, the impression cylinder 421 and the printing cylinder 422 are arranged correspondingly; a gap for the web 8 to pass through is formed between the printing cylinder 422 and the impression cylinder 421. The web 8 passes through the gap formed between the printing cylinder 422 and the impression cylinder 421 to facilitate the support of the web 8 by the impression cylinder 421 and facilitate the printing or coating of the printing cylinder 422 on the web 8.

[0056] Referring to Figure 2 and Figure 7 , the turning roller 51 arranged on the printing / coating device 4 forms an adjustable angle with the axis of the printing / coating device 4. By adjusting the angle formed between the turning roller 51 and the axis of the printing / coating device 4, the speed of the web 8 remains unchanged before and after the web 8 is turned by the turning roller 51, and the web 8 will not fold. The angle formed between the turning roller 51 and the axis of the printing / coating device 4 is preferably 45°. In this embodiment, the turning roller 51 is arranged on the color base 41, and the turning roller 51 is arranged at an angle with the axis of the color base 41. The angle formed between the turning roller 51 and the axis of the color base 41 can be adjusted. The angle formed between the turning roller 51 and the axis of the color base 41 is preferably 45° to facilitate the vertical turning of the web 8 by the turning roller 51; the color base 41 is rectangularly arranged, and the turning roller 51 is arranged diagonally on the rectangular color base 41, and the turning roller 51 can adjust the angle on the color base 41 to facilitate the vertical turning of the web 8 by the turning roller 51.

[0057] Reference Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 ,The turning roller 51 can be provided with one or more. The turning roller 51 is located between two sets of printing / coating devices 4 and outside the two sets of printing / coating devices 4. A plurality of turning rollers 51 are arranged between the two sets of printing / coating devices 4 to enable the coil material 8 to achieve 90°, 180°, 270° and 360° turning between the two sets of printing / coating devices 4 via the turning roller 51; the turning roller 51 is located between the printing / coating device 4 and the unwinding device 2 and outside the printing / coating device 4 and the unwinding device 2. A plurality of turning rollers 51 are arranged between the printing / coating device 4 and the unwinding device 2 to enable the coil material 8 to achieve 90°, 180°, 270° and 360° turning between the printing / coating device 4 and the unwinding device 2 via the turning roller 51; the turning roller 51 is located between the printing / coating device 4 and the post-drying device 7 and outside the printing / coating device 4 and the post-drying device 7. A plurality of turning rollers 51 are arranged between the printing / coating device 4 and the post-drying device 7 to enable the coil material 8 to achieve 90°, 180°, 270° and 360° turning between the printing / coating device 4 and the post-drying device 7 via the turning roller 51; the turning roller 51 is located between the post-drying device 7 and the winding device 3 and outside the post-drying device 7 and the winding device 3. A plurality of turning rollers 51 are arranged between the post-drying device 7 and the winding device 3 to enable the coil material 8 to achieve 90°, 180°, 270° and 360° turning between the post-drying device 7 and the winding device 3 via the turning roller 51; the turning roller 51 is arranged on the printing / coating device 4, and the turning roller 51 forms an adjustable angle with the axis of the printing / coating device 4. The coil material 8 is turned by the turning roller 51 to enrich the path of the coil material 8. The angle formed by the turning roller 51 and the axis of the printing / coating device 4 is preferably 45°;

[0058] Since the turning roller 51 can be arranged between two sets of printing / coating devices 4, between the printing / coating device 4 and the unwinding device 2, between the printing / coating device 4 and the post-drying device 7, and between the post-drying device 7 and the winding device 3, the unwinding device 2, two sets of printing / coating devices 4, the post-drying device 7 and the winding device 3 are arranged on at least two axes, enriching the layout mode of the printing / coating equipment, making the layout of the printing / coating equipment more flexible, thus reducing the requirements for the site during the layout of the printing / coating equipment and breaking through the limitation that traditional printing equipment must be arranged on the same axis. The post-drying device 7 and / or the winding device 3 and two sets of printing / coating devices 4 are preferably arranged vertically or parallel, enriching the layout mode of the post-drying device 7, the winding device 3 and two sets of printing / coating devices 4, making the layout of the post-drying device 7, the winding device 3 and two sets of printing / coating devices 4 more flexible.

[0059] The roller 5 further includes an inlet roller 53 and a guiding roller 52, and the inlet roller 53 and the guiding roller 52 are arranged on the frame 1. Among them, the inlet roller 53 is located between two groups of printing / coating devices 4. The coil material 8 is introduced into the printing / coating device 4 through the inlet roller 53, so that the coil material 8 is fed between the two groups of printing / coating devices 4, that is, the coil material 8 enters the color group 42 on one of the two color seats 41 from between the two color seats 41, and then surrounds the other color groups 42. Six groups of color groups 42 can be arranged on the color seat 41. Among them, three groups of color groups 42 are arranged longitudinally on one side of the color seat 41, and the other three groups of color groups 42 are arranged on the other side of the color seat 41. The coil material 8 surrounds the other color groups 42 upward from the color group 42 at the bottom on one side of the color seat 41.

[0060] The winding device 3 includes a winding mechanism and / or a cutting / folding winding mechanism. Since the unwinding device 2 includes a double-unwinding structure, when the winding device 3 is set as a winding mechanism, the winding mechanism is configured as a double-winding structure in cooperation with the double-unwinding structure, so as to wind the coil material released by the double-unwinding structure; when the winding device 3 is set as a cutting / folding winding mechanism, the cutting / folding winding mechanism cuts the coil material released by the unwinding device, and then winds it in a single-sheet or multi-sheet folded manner.

[0061] The embodiments of this specific implementation manner are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A printing / coating device, comprising an unwinding device (2), at least two groups of printing / coating devices (4), a post-drying device (7), a plurality of rollers (5), and a winding device (3) for winding up a web (8), characterized in that: At least on the last set of printing / coating devices (4), there is a turning roller (51). According to the arrangement of the printing / coating devices, additional turning rollers (51) are arranged between each printing / coating device. The web (8) is turned by the turning roller (51) before entering the next printing / coating device. In this way, no matter how many printing / coating devices are added, since the web (8) is turned by the turning roller (51), the printing surface can be kept from contacting any roller (5). There is no post-drying device provided between two adjacent sets of printing / coating devices. The web (8) unwound from the unwinding device (2) is dried in the post-drying device (7) after being turned by the turning roller (51) of the last set of printing / coating devices (4), and then is wound by the winding device (3); the rollers (5) from the first set of the printing / coating devices (4) to the post-drying device (7) are located on the same side of the non-printing surface of the web (8). The printing / coating device (4) includes a color base (41) and a number of color groups (42) provided on the color base (41); the number of the color groups (42) are arranged symmetrically or asymmetrically on the color base (41); the number of the color groups (42) on the color base (41) are arranged in a bookshelf type, satellite type and / or modular type.

2. The printing / coating device according to claim 1, characterized in that: The turning roller (51) forms an adjustable angle with the axis of the printing / coating device (4).

3. A printing / coating device according to claim 2, characterized in that: The angle formed by the turning roller (51) and the axis of the printing / coating device (4) is 45°.

4. A printing / coating device according to claim 1, characterized in that: One or more turning rollers (51) are provided, and the turning roller (51) is located between two sets of printing / coating devices (4); and / or the turning roller (51) is located between the printing / coating device (4) and the unwinding device (2); and / or the turning roller (51) is located between the printing / coating device (4) and the post-drying device (7); and / or the turning roller (51) is located between the post-drying device (7) and the winding device (3).

5. A printing / coating device according to claim 4, characterized in that: The turning roller (51) forms an adjustable angle with the axis of the printing / coating device (4).

6. The printing / coating device according to claim 5, characterized in that: The angle formed by the turning roller (51) and the axis of the printing / coating device (4) is 45°.

7. A printing / coating device according to claim 1 or 4, characterized in that: The turning roller (51) includes a guide roller and / or an air shaft.

8. A printing / coating device according to claim 1, characterized in that: The winding device (3) includes a winding mechanism.

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