Positioning and laminating apparatus for packaging film

Abstract

The utility model provides a kind of positioning composite equipment of packaging film, comprising: printing film unwinding glue coating unit, holographic film unwinding unit, positioning composite unit and winding unit;The positioning composite unit is located downstream of the printing film unwinding glue coating unit and the holographic film unwinding unit, the transmission path of printing film is constituted between the printing film unwinding glue coating unit and the positioning composite unit, the transmission path of holographic film is constituted between the holographic film unwinding unit and the positioning composite unit;The winding unit is located downstream of the positioning composite unit, the transmission path of composite film is constituted between the positioning composite unit and the winding unit.The utility model separates holographic film production and printing film production, there is no printing graphics when holographic film is coated, high-temperature drying has no effect on holographic graphics size, printing film is printed by conventional high speed, and printing quality is high, without high-temperature drying, and size is stable.

Description

Technical Field

[0001] This utility model relates to the field of flexible packaging technology, specifically to a positioning and laminating device for packaging film. Background Technology

[0002] The combination of laser holographic anti-counterfeiting technology and traditional printing processes has resulted in new types of anti-counterfeiting packaging materials. These materials can display vibrant rainbow, lenticular, cat's eye, and embossed laser effects, possessing unique visual characteristics, good printability, and a certain degree of anti-counterfeiting capability. They have been successfully applied in the packaging industry, such as in cigarette packs, wine boxes, cosmetics, and toothpaste boxes. However, current laser holographic technology is mainly used in paper packaging, with relatively limited application in flexible plastic packaging.

[0003] CN211892423U discloses a printing, coating, and molding machine. This equipment includes an unwinding mechanism and a rewinding mechanism. Through a connected printing system, coating system, and molding system, it can perform gravure printing, coating, and molding processes on roll materials, achieving integrated printing, coating, and molding. However, this equipment has two problems. First, the drying temperature for coating the information layer is very high, typically 120-160℃. At this temperature, the printed film will experience significant dimensional deformation, and the amount of deformation is uncontrollable. During molding in the molding unit, the registration accuracy of the positioning pattern is not high. Second, to ensure a laser holographic effect, the molding speed is generally no more than 100 meters per minute, usually between 40 and 80 meters per minute. At this gravure printing speed, many high-resolution images and other elements cannot be perfectly reproduced, failing to meet the needs of high-requirement flexible packaging films.

[0004] CN116852834A discloses a packaging film with a positioning holographic effect, its preparation method, and its application. The method involves coating one side of a base film with a laser-molded information coating. After drying, a molding and printing integrated machine is used to mold the laser holographic layer on the side away from the base film, followed by inline printing of an image coating layer, forming a laser holographic layer and an image layer on one side of the base film. Then, a reflective layer is prepared on the side of the image layer away from the base film, resulting in a packaging film with a positioning holographic effect. This invention pre-coats the information layer coating on a blank base film, solving the problem of the high temperature affecting base film deformation during coating. However, because printing and molding are completed in an integrated manner, the printing quality is still limited by the molding production speed and cannot meet the requirements of high-performance flexible packaging films.

[0005] Therefore, how to provide a flexible packaging film that can accurately position personalized laser holographic graphics such as rainbows, gratings, cat's eyes, and platinum embossing has become an urgent technical problem to be solved. Utility Model Content

[0006] In view of the deficiencies in the prior art, the purpose of this utility model is to provide a positioning and laminating device for packaging films.

[0007] The positioning and laminating equipment for packaging film provided by this utility model includes: a printing film unwinding and coating unit, a holographic film unwinding unit, a positioning and laminating unit, and a winding unit; The positioning composite unit is located downstream of the printed film unwinding and coating unit and the holographic film unwinding unit. The printed film unwinding and coating unit and the positioning composite unit form a transmission path for the printed film, and the holographic film unwinding unit and the positioning composite unit form a transmission path for the holographic film. The winding unit is located downstream of the positioning composite unit, and the positioning composite unit and the winding unit form a transmission path for the composite film.

[0008] Furthermore, the printing film unwinding and coating unit includes a printing film unwinding roller, a coating roller, and an oven, wherein the printing film unwinding roller, the coating roller, and the oven are sequentially located on the transport path of the printing film.

[0009] Furthermore, the holographic film unwinding unit includes a holographic film unwinding roller and a fixed-length stretching traction roller, which are located sequentially on the transport path of the holographic film.

[0010] Furthermore, the circumference of the holographic film output by the holographic film unwinding unit is consistent with the circumference of the printed film output by the printed film unwinding and coating unit.

[0011] Furthermore, the printed film unwinding and coating unit also includes: The first version of the weekly measuring roller is located on the printing film transport path between the oven and the positioning composite unit.

[0012] Furthermore, the printing film unwinding and coating unit also includes a first cursor detector located outside the first plate circumference measuring roller, with the detection end of the first cursor detector facing the printing film on the first plate circumference measuring roller; And / or, the end of the first version of the circumferential measuring roller has an encoder; And / or, a second correction device is located on the printing film transport path between the oven and the first printing cycle measuring roller.

[0013] Furthermore, the printed film unwinding and coating unit also includes: The first tension roller is located on the printing film transport path between the printing film unwinding roller and the coating roller; And / or, the first correction device is located on the printing film transport path between the printing film unwinding roller and the coating roller; And / or, a second correction device is located on the printing film transport path between the oven and the positioning composite unit; And / or, a first back pressure roller, located outside the coating roller, presses the printed film against the surface of the coating roller.

[0014] Furthermore, the holographic film unwinding unit also includes: The third correction device is located on the holographic film transport path between the holographic film unwinding roller and the fixed-length stretching traction roller; And / or, a second tension roller is located on the holographic film transport path between the holographic film unwinding roller and the fixed-length stretching traction roller; And / or, a second back pressure roller, located outside the fixed-length stretching traction roller, presses the holographic film against the surface of the fixed-length stretching traction roller.

[0015] Furthermore, the holographic film unwinding unit also includes: The second version of the circumferential measuring roller is located on the holographic film transmission path between the fixed-length stretching traction roller and the positioning composite unit.

[0016] Furthermore, the holographic film unwinding unit also includes a second cursor detector, located outside the second circumference measuring roller, with the detection end of the second cursor detector facing the holographic film on the second circumference measuring roller; And / or, the end of the second version of the circumferential measuring roller has an encoder.

[0017] Furthermore, the positioning composite unit includes: The traction roller is located on the holographic film transport path downstream of the holographic film unwinding unit; The composite roller pair is located on the printing film transport path downstream of the printing film unwinding and coating unit and on the holographic film transport path downstream of the traction roller.

[0018] Furthermore, the composite roller pair includes a first composite roller and a second composite roller, with the working surfaces of the first composite roller and the second composite roller arranged opposite to each other, and the printed film and the holographic film are pressed together between the working surfaces of the first composite roller and the second composite roller; And / or, the positioning composite unit further includes a third cursor detector located on the holographic film transmission path between the traction roller and the composite roller pair, with the detection end of the third cursor detector facing the holographic film; And / or, the positioning composite unit further includes a third back pressure roller, located outside the traction roller, which presses the holographic film against the surface of the traction roller.

[0019] Furthermore, the winding unit includes a winding roller located downstream of the positioning composite unit.

[0020] Furthermore, the winding unit also includes: A still image detector is located between the positioning composite unit and the take-up roller, with the detection end of the still image detector facing the composite film; The third tension roller is located on the composite film transport path between the positioning composite unit and the winding roller.

[0021] Furthermore, the positioning and laminating device also includes multiple guide rollers, which are distributed along the transport paths of the printed film, holographic film, and composite film; And / or, the printing film unwinding and coating unit includes a first plate circumference measuring roller, a first cursor detector is provided on the outer side of the first plate circumference measuring roller, the positioning composite unit includes a traction roller, a third cursor detector and a first composite roller are sequentially provided downstream of the traction roller along the holographic film transport path, and the length of the printing film transport path between the first cursor detector and the first composite roller is equal to the length of the holographic film transport path between the third cursor detector and the first composite roller; And / or, the composite adhesive is one of dry composite adhesive, wet composite adhesive, and solvent-free composite adhesive; And / or, the coating method for the composite adhesive includes one of anilox roller coating, smooth roller coating, three-roll transfer, and reverse coating.

[0022] Compared with the prior art, the present invention has the following beneficial effects: This invention separates the production of holographic film from the production of printed film. No images are printed during the coating of holographic film, and high-temperature drying does not affect the size of the holographic images. The printed film is printed using conventional high-speed printing, resulting in high printing quality. It does not undergo high-temperature drying and has stable dimensions.

[0023] This invention can be applied to the production of various composite films, such as flexible packaging films or rigid packaging films.

[0024] Furthermore, the printed film is combined with the holographic film after being stretched to a fixed length, resulting in high composite accuracy, with longitudinal positioning accuracy ≤0.15mm and transverse accuracy ≤0.2mm, which can meet the needs of flexible packaging. Attached Figure Description

[0025] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of this utility model; In the picture: 1-Printing film unwinding roller, 2-Guide roller, 3-First web guiding device, 4-First tension roller, 5-Glue coating roller, 6-First back pressure roller, 7-Oven, 8-Second web guiding device, 9-First plate-circumference measuring roller, 10-First cursor detector, 11-First composite roller, 12-Second composite roller, 13-Holographic film unwinding roller, 14-Third web guiding device, 15-Second tension roller, 16-Fixed-length stretching traction roller, 17-Second back pressure roller, 18-Second cursor detector, 19-Second plate-circumference measuring roller, 20-Third cursor detector, 21-Traction roller, 22-Third back pressure roller, 23-Still image detector, 24-Third tension roller, 25-Rewinding roller. Detailed Implementation

[0026] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0027] like Figure 1 As shown, a positioning and laminating device for packaging film mainly comprises three parts: a printed film unwinding and coating unit, a holographic film unwinding unit, a positioning and laminating unit, and a rewinding unit. The positioning and laminating unit is located downstream of the printed film unwinding and coating unit and the holographic film unwinding unit, forming the transport path for the printed film; the holographic film unwinding unit and the positioning and laminating unit form the transport path for the holographic film. The rewinding unit is located downstream of the positioning and laminating unit, forming the transport path for the laminating film.

[0028] The printing film unwinding and coating unit includes a printing film unwinding roller 1, a first web guide 3, a first tension roller 4, a coating roller 5, an oven 7, a second web guide 8, and a first plate circumference measuring roller 9, which are sequentially located on the printing film transport path. A first back pressure roller 6 is located outside the coating roller 5, pressing the printing film against the surface of the coating roller 5. A first cursor detector 10 is located outside the first plate circumference measuring roller 9, with its detection end facing the printing film on the first plate circumference measuring roller 9. Multiple guide rollers 2 are also provided on the printing film transport path to facilitate the transport of the printing film. The web guide can be a photoelectric sensor, an ultrasonic sensor, or a CCD image sensor; in this embodiment, a CCD image sensor is preferred.

[0029] The printed film, with its graphics and text printed according to the design dimensions, is unwound from the unwinding roller 1. The left and right positions of the printed film can be adjusted by the first alignment device 3. The first tension roller 4 provides real-time feedback of tension data, allowing adjustment of the rotation speed of the unwinding roller 1 to maintain stable tension. A composite adhesive is applied to the printed film by the coating roller 5. The film then enters the drying oven 7 for drying and leveling. After exiting the drying tunnel, the left and right positions are adjusted again by the second alignment device 8. The perimeter of the printed film is measured by the first perimeter measuring roller 9, equipped with an encoder at its end, and the cursor detector 10 above it. This allows adjustment of the rotation speed of the coating roller 5 to ensure a stable and consistent perimeter of the printed film after exiting the drying tunnel. The coating roller 5 can be a servo coating roller for precise speed control.

[0030] In the printing film unwinding and coating unit, the composite adhesive can be one of the following: dry composite adhesive, wet composite adhesive, or solvent-free composite adhesive. The coating method can be one of the following: anilox roller coating, smooth roller coating, three-roll transfer coating, or reverse coating.

[0031] The holographic film unwinding unit includes: a holographic film unwinding roller 13, a third web guiding device 14, a second tension roller 15, a fixed-length stretching traction roller 16, and a second circumference measuring roller 19, which are sequentially located on the holographic film's transport path. A second back pressure roller 17 is located outside the fixed-length stretching traction roller 16, pressing the holographic film against its surface. A second cursor detector 18 is located outside the second circumference measuring roller 19, with its detection end facing the holographic film on the second circumference measuring roller 19. Multiple guide rollers 2 are also provided on the holographic film's transport path to facilitate its transport.

[0032] The holographic film, molded with graphics and coated with aluminum according to the design dimensions, is unwound from the holographic film unwinding roller 13. The third alignment device 14 adjusts its left and right positions to align with the printed film. The second tension roller 15 provides real-time tension data feedback to adjust the rotation speed of the holographic film unwinding roller 13 to maintain stable tension. The film is then stretched to a fixed length by the fixed-length stretching traction roller 16, ensuring that the circumference of the holographic film matches that of the printed film exiting the drying tunnel. The circumference is measured by the second circumference measuring roller 19 equipped with an encoder and the second cursor detector 18 above it, before entering the positioning composite unit. The fixed-length stretching traction roller 16 is a fixed-length stretching servo traction roller for easy stretching control.

[0033] The positioning composite unit includes a traction roller 21 and a composite roller pair, arranged sequentially. The traction roller 21 is located on the holographic film transport path downstream of the holographic film unwinding unit, and the composite roller pair is simultaneously located on the printing film transport path downstream of the printing film unwinding and coating unit and on the holographic film transport path downstream of the traction roller 21. A third cursor detector 20 is located on the holographic film transport path between the traction roller 21 and the composite roller pair, with its detection end facing the holographic film. The composite roller pair is located downstream of the printing film unwinding and coating unit and the third cursor detector 20, and includes a first composite roller 11 and a second composite roller 12. The working surfaces of the first composite roller 11 and the second composite roller 12 are arranged opposite each other, and the printing film and the holographic film are pressed together between the working surfaces of the first composite roller 11 and the second composite roller 12. The traction roller 21 is located on the holographic film transport path between the holographic film unwinding unit and the third cursor detector 20. A third back pressure roller 22 is located outside the traction roller 21, pressing the holographic film against the surface of the traction roller 21. The positioning composite unit also has multiple guide rollers 2 to facilitate the transfer of holographic film and printed film. In this embodiment, the first composite roller 11 can be a steel roller, and the second composite roller 12 can be a rubber roller; this utility model does not impose any limitations on this.

[0034] After the holographic film, guided by the traction roller 21, is detected by the third cursor detector 20, it is laminated with the printed film via the first composite roller 11. The composite position of the two films is based on the position of the first cursor detector 10 after the printed film exits the drying tunnel. The position of the third cursor detector 20 after the holographic film passes through the traction roller 21 is adjusted so that the length of the transmission path between the two films from the cursor detector to the first composite roller 11 is equal. The first cursor detector 10 and the third cursor detector 20 simultaneously detect the positioning cursor. The traction roller 21 is a servo traction roller 21 to facilitate speed adjustment.

[0035] The winding unit includes a still image detector 23, a third tension roller 24, and a winding roller 25, which are arranged sequentially on the transport path of the composite film.

[0036] The detection end of the still image detector 23 is positioned facing the composite film. After lamination, the composite film is monitored in real time by the still image detector 23 to ensure the accuracy of the alignment between the two layers. If there is a misalignment, the position of the third cursor detector 20, through which the holographic film passes, can be slightly adjusted forward or backward to ensure accurate alignment. After passing through the third tension roller 24, the film is wound up. The winding unit also has multiple guide rollers 2 to facilitate the transport of the composite film.

[0037] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0038] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A positioning and laminating device for packaging films, characterized in that, include: The unit includes a printing film unwinding and coating unit, a holographic film unwinding unit, a positioning and laminating unit, and a winding unit. The positioning composite unit is located downstream of the printed film unwinding and coating unit and the holographic film unwinding unit. The printed film unwinding and coating unit and the positioning composite unit form a transmission path for the printed film, and the holographic film unwinding unit and the positioning composite unit form a transmission path for the holographic film. The winding unit is located downstream of the positioning composite unit, and the positioning composite unit and the winding unit form a transmission path for the composite film.

2. The positioning and laminating equipment for packaging films according to claim 1, characterized in that, The printing film unwinding and coating unit includes a printing film unwinding roller (1), a coating roller (5), and an oven (7). The printing film unwinding roller (1), the coating roller (5), and the oven (7) are located sequentially on the transmission path of the printing film.

3. The positioning and laminating equipment for packaging films according to claim 1, characterized in that, The holographic film unwinding unit includes a holographic film unwinding roller (13) and a fixed-length stretching traction roller (16), which are located sequentially on the transmission path of the holographic film.

4. The positioning and laminating equipment for packaging films according to claim 1, characterized in that, The circumference of the holographic film output from the holographic film unwinding unit is consistent with the circumference of the printed film output from the printed film unwinding and coating unit.

5. The positioning and laminating equipment for packaging films according to claim 2, characterized in that, The printed film unwinding and coating unit also includes: The first version of the weekly measuring roller (9) is located on the printing film transport path between the oven (7) and the positioning composite unit.

6. The positioning and laminating equipment for packaging films according to claim 5, characterized in that, The printed film unwinding and coating unit also includes: The first cursor detector (10) is located outside the first plate circumference measuring roller (9), and the detection end of the first cursor detector (10) is set toward the printing film on the first plate circumference measuring roller (9); And / or, the end of the first version of the circumferential measuring roller (9) has an encoder; And / or, a second correction device (8) is located on the printing film transport path between the oven (7) and the first printing cycle measuring roller (9).

7. The positioning and laminating equipment for packaging films according to claim 2, characterized in that, The printed film unwinding and coating unit also includes: The first tension roller (4) is located on the printing film transport path between the printing film unwinding roller (1) and the coating roller (5); And / or, the first correction device (3) is located on the printing film transport path between the printing film unwinding roller (1) and the glue coating roller (5); And / or, a second correction device (8) is located on the printing film transport path between the oven (7) and the positioning composite unit; And / or, a first back pressure roller (6), located outside the coating roller (5), presses the printed film against the surface of the coating roller (5).

8. The positioning and laminating equipment for packaging films according to claim 3, characterized in that, The holographic film unwinding unit also includes: The third correction device (14) is located on the holographic film transport path between the holographic film unwinding roller (13) and the fixed-length stretching traction roller (16); And / or, a second tension roller (15) is located on the holographic film transport path between the holographic film unwinding roller (13) and the fixed-length stretching traction roller (16); And / or, a second back pressure roller (17), located outside the fixed-length stretching traction roller (16), presses the holographic film against the surface of the fixed-length stretching traction roller (16).

9. The positioning and laminating equipment for packaging films according to claim 3, characterized in that, The holographic film unwinding unit also includes: The second version of the circumferential measuring roller (19) is located on the holographic film transmission path between the fixed-length stretching traction roller (16) and the positioning composite unit.

10. The positioning and laminating equipment for packaging films according to claim 9, characterized in that, The holographic film unwinding unit also includes a second cursor detector (18), located outside the second version circumference measuring roller (19), with the detection end of the second cursor detector (18) facing the holographic film on the second version circumference measuring roller (19); And / or, the end of the second version of the circumferential measuring roller (19) has an encoder.

11. The positioning and laminating equipment for packaging films according to claim 1, characterized in that, The positioning composite unit includes: The traction roller (21) is located on the holographic film transport path downstream of the holographic film unwinding unit; The composite roller pair is located on the printing film transport path downstream of the printing film unwinding and coating unit and on the holographic film transport path downstream of the traction roller (21).

12. The positioning and laminating equipment for packaging films according to claim 11, characterized in that, The composite roller pair includes a first composite roller (11) and a second composite roller (12), with the working surfaces of the first composite roller (11) and the second composite roller (12) arranged opposite to each other. The printed film and the holographic film are pressed together between the working surfaces of the first composite roller (11) and the second composite roller (12). And / or, the positioning composite unit further includes a third cursor detector (20) located on the holographic film transmission path between the traction roller (21) and the composite roller pair, with the detection end of the third cursor detector (20) facing the holographic film; And / or, the positioning composite unit further includes a third back pressure roller (22), located outside the traction roller (21), which presses the holographic film against the surface of the traction roller (21).

13. The positioning and laminating equipment for packaging films according to claim 1, characterized in that, The winding unit includes a winding roller (25) located downstream of the positioning composite unit.

14. The positioning and laminating equipment for packaging films according to claim 13, characterized in that, The winding unit further includes: A still image detector (23) is located between the positioning composite unit and the winding roller (25), with the detection end of the still image detector (23) facing the composite film; The third tension roller (24) is located on the composite film transport path between the positioning composite unit and the winding roller (25).

15. The positioning and laminating equipment for packaging films according to claim 1, characterized in that, The positioning and composite equipment also includes multiple guide rollers (2), which are distributed along the transmission paths of the printed film, holographic film and composite film; And / or, the printing film unwinding and coating unit includes a first plate circumference measuring roller (9), a first cursor detector (10) is provided on the outside of the first plate circumference measuring roller (9), the positioning composite unit includes a traction roller (21), a third cursor detector (20) and a first composite roller (11) are sequentially provided downstream of the traction roller (21) along the holographic film transmission path, the length of the printing film transmission path between the first cursor detector (10) and the first composite roller (11) is equal to the length of the holographic film transmission path between the third cursor detector (20) and the first composite roller (11); And / or, the composite adhesive applied by the printing film unwinding and coating unit is one of dry composite adhesive, wet composite adhesive, and solvent-free composite adhesive; And / or, the coating method of the printing film unwinding and coating unit for applying composite adhesive includes one of anilox roller coating, smooth roller coating, three-roller transfer, and reverse coating.

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