Packaging printing process and printing equipment

Abstract

The present application relates to the field of printing technology, and in particular to a packaging printing process and printing equipment, including unwinding a paper package and peeling off the adhesive layer and surface film on the paper package; printing on the side of the film where the adhesive layer is adhered; drying the printed pattern on the film; and laminating the printed surface and adhesive layer of the film and rolling it up, so that the adhesive layer is not easily affected during the drying process, and the lamination quality is not easily affected.

Description

Technical Field

[0001] The present application relates to the field of printing technology, and in particular to a packaging printing process and printing equipment. Background Art

[0002] Adhesive surface printing is done on the adhesive surface of the paper packaging after the surface film of the packaging is peeled off. It can not only enhance the color of the pattern, but also ensure that the printed pattern can always maintain good color and integrity during the use of the packaging for a longer period of time as long as the surface film is not peeled off and the adhesive surface of the paper packaging is not damaged.

[0003] Existing adhesive surface printing generally requires the use of a peeling roller in conjunction with a peeling claw and a peeler to first separate the surface film and the adhesive layer on the paper packaging, then print on the adhesive layer of the paper packaging, and then dry and laminate the adhesive surface and film of the printed paper packaging.

[0004] Regarding the above-mentioned related technologies, since the ink needs to be dried, the adhesive layer will also be heated, which makes the adhesive layer prone to melting. As a result, the initial adhesion of the surface film and the adhesive layer of the paper packaging is relatively low after lamination, and the lamination quality is easily affected. Summary of the Invention

[0005] In order to reduce the impact on composite quality, the present application provides a packaging printing process and printing equipment.

[0006] The present application provides a packaging printing process that adopts the following technical solution.

[0007] A packaging printing process specifically includes the following steps.

[0008] Step 1: Unwind the paper packaging and peel off the adhesive layer and surface film on the paper packaging;

[0009] Step 2: Printing is performed on the side of the film that is adhered to the adhesive layer;

[0010] Step 3, drying the printed pattern on the film;

[0011] Step 4: Laminate the printed surface and the adhesive layer of the film and roll it up.

[0012] By adopting the above technical solution, printing is performed on the surface film and then the surface film is dried, so that the adhesive layer on the paper packaging is not easily affected by drying. When the surface film is dried and then laminated, the adhesive layer can provide a higher initial peel strength, so that the lamination quality is not easily affected.

[0013] The packaging and printing equipment provided in this application adopts the following technical solution.

[0014] A packaging and printing device operates according to the above-mentioned packaging and printing process, including a frame, a unwinding roller rotatably connected to the frame and unwinding a paper package, a peeling portion provided on the frame and peeling off the adhesive layer and the surface film of the paper package, a printing roller portion provided on the frame and printing on the surface film, a drying device provided on the frame and drying the printed side of the surface film, a cooling device provided on the frame and cooling the paper package, a laminating portion provided on the frame and pressing the dried surface film and the cooled paper package, and a winding roller rotatably connected to the frame and collecting the laminated paper package.

[0015] By adopting the above technical solution, the paper packaging will be cooled to a certain extent while the surface film is being dried, so that when the surface film with a relatively high temperature and the adhesive layer on the paper packaging with a relatively low temperature are laminated, the surface of the adhesive layer can be at a suitable curing temperature, so that the adhesive layer can adhere better to the surface film, further reducing the impact of the lamination.

[0016] Optionally, the drying device includes a drying box arranged on the frame and for the surface film to enter, and a drying plate arranged in the drying box and close to the surface film and heating the surrounding air, and the drying box is located above the paper packaging.

[0017] By adopting the above technical solution, the drying plate heats the air around it, so that the temperature in the drying box increases to achieve drying of the surface film, and the hot air in the drying box moves upward, so as to minimize the possibility of the hot air overflowing from the drying box having a significant impact on the glue layer on the paper packaging.

[0018] Optionally, the inner walls between the middle and two side edges of the drying box are provided with box partitions, the drying plate is located between the two box partitions, and the upper parts of the two box partitions are provided with guide fans that blow the air in the middle of the drying box to the sides of the drying box, and there is a distance between the bottom of the box partition and the bottom of the drying box.

[0019] By adopting the above technical solution, the guide fan blows the hot air between the two box partitions to both sides of the drying box, so that the hot air in the drying box is circulated, making the temperature in the drying box more uniform, which is conducive to uniform and sufficient drying of the surface film.

[0020] Optionally, the drying plate is located above the surface film, and a heat insulation plate is fixedly connected in the drying box between the drying plate and the surface film, and there is a distance between the heat insulation plate and the two box partitions.

[0021] By adopting the above technical solution, the heat of the drying plate is not easily transferred directly to the surface film. It will first be driven by the guide fan to circulate, so as to reduce the high temperature of the surface film during the drying process and ensure that the drying plate is fully dried.

[0022] Optionally, the cooling device includes several bottom rollers rotatably connected to the frame and in contact with the side of the paper packaging away from the glue layer, several silicone rubber rollers rotatably connected to the frame and in contact with the glue layer, and two rows of cooling rollers that are in one-to-one contact with all the bottom rollers and all the silicone rubber rollers and have cooling liquid circulating inside.

[0023] By adopting the above technical solution, the cooling roller reduces the surface temperature of the bottom roller and the silicone rubber roller, so that the temperature of the paper packaging and the glue layer can be effectively reduced.

[0024] Optionally, the frame is slidably connected to a roller frame corresponding to each cooling roller, and the roller frame is provided for rotating the cooling roller. The frame is provided with a roller frame cylinder corresponding to each row of roller frames, which enables each row of roller frames to move so that the distance between the cooling roller and the corresponding bottom roller or silicone rubber roller is changed.

[0025] By adopting the above technical solution, each cooling roller can abut against or stay away from the corresponding bottom roller or silicone rubber roller, so that the temperature drop of the glue layer and the paper packaging can be regulated to a certain extent.

[0026] Optionally, one roller frame cylinder is provided for each row of roller frames, and the roller frame cylinder drives one of the edge of each row of roller frames to move. Each roller frame is provided with a cooperative rod so that each row of roller frames corresponds to a row of cooperative rods. Two adjacent cooperative rods in the same row can abut against each other. The farther away from the roller frame cylinder, the longer the cooperative rod in the same row. The frame is provided with a frame spring corresponding to each roller frame to move the roller frame toward the corresponding bottom roller or silicone rubber roller.

[0027] By adopting the above technical solution, a row of roller frames can be controlled to be lifted in sequence under the action of a roller frame cylinder, and at the same time, the space occupied above the roller frames can be reduced, making the overall equipment more compact.

[0028] Optionally, one of the cooling rollers abuts against two adjacent bottom rollers or two adjacent silicone rubber rollers.

[0029] By adopting the above technical solution, the number of cooling rollers can be reduced, and there is no need to provide a cooling roller for each bottom roller or silicone rubber roller.

[0030] Optionally, a row of roller inner sheets through which cooling liquid can pass is fixedly connected to the hollow interior of each cooling roller.

[0031] By adopting the above technical solution, the wall thickness of the cooling roller can be made as thin as possible, and the maximum pressure between the cooling roller and the bottom roller or the silicone rubber roller can be large.

[0032] In summary, this application has at least one of the following beneficial effects:

[0033] 1. Print on the surface film and then dry the surface film to make the adhesive layer on the paper packaging less susceptible to drying effects. When laminating after the surface film is dried, the adhesive layer can provide a higher initial peel strength, so that the lamination quality is less likely to be significantly affected;

[0034] 2. When laminating a surface film with a relatively high temperature and an adhesive layer on a paper packaging with a relatively low temperature, the surface of the adhesive layer can be at a suitable curing temperature, so that the adhesive layer can adhere better to the surface film, further reducing the impact of the lamination. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the main structure of the present application with one side wall of the rack removed;

[0036] Figure 2 This is a structural diagram of the drying box with the box opening cut away;

[0037] Figure 3 This is a schematic diagram of the structure in which the drying box is removed to better show the cooling device, and all cooling rollers are away from the corresponding bottom rollers or silicone rubber rollers;

[0038] Figure 4 It is a schematic diagram of the cutaway cross-sectional structure at one end of the cooling roller.

[0039] Explanation of the accompanying drawings: 1. Frame; 2. Unwinding roller; 3. Peeling part; 31. Peripheral hole; 32. Center hole; 33. Compound part; 34. Cylinder rod; 4. Printing roller part; 41. Roller frame; 42. Roller frame cylinder; 43. Coordinating rod; 44. Frame spring; 45. Roller inner sheet; 46. Winding roller; 47. Box mouth; 49. Frame slider; 5. Drying device; 51. Cooling device; 52. Drying plate; 53. Drying box; 54. Guide fan; 55. Box partition; 56. Heat insulation board; 57. Bottom roller; 58. Silicone rubber roller; 59. Cooling roller. DETAILED DESCRIPTION

[0040] The present application is further described in detail below with reference to the accompanying drawings.

[0041] The embodiment of the present application discloses a packaging printing process, which specifically includes the following steps.

[0042] Step 1: Unwind the paper packaging and peel off the adhesive layer and surface film on the paper packaging;

[0043] Step 2: Printing is performed on the side of the film that is adhered to the adhesive layer;

[0044] Step 3, drying the printed pattern on the film;

[0045] Step 4: Laminate the printed surface and the adhesive layer of the film and roll it up.

[0046] The implementation principle of a packaging printing process in an embodiment of the present application is: printing the surface film and then drying the surface film, so that the adhesive layer of the paper packaging is not easily affected by drying, and the composite quality between the paper packaging and the surface film is not easily greatly affected.

[0047] The present application also discloses a packaging printing device, referring to Figure 1 The invention comprises a frame 1 placed on the ground. A horizontal unwinding roller 2 is rotatably connected to one end of the frame 1. The unwinding roller 2 unwinds the paper packaging to be peeled and printed. A peeling unit 3 is installed on the side of the frame 1 near the unwinding roller 2. The peeling unit 3 can be a peeling roller, a peeler, or a combination of peeling claws and a peeling sheet to remove the surface film from the adhesive layer of the paper packaging, and the surface film is located directly above the paper packaging. A printing roller unit 4 is installed on the side of the frame 1 away from the unwinding roller 2. The printing roller unit 4 can be several rotating printing rubber rollers that transfer ink from the ink tank to the surface of the paper packaging in a predetermined pattern, so that the film adheres to the surface of the paper packaging, that is, the lower surface of the surface film. A drying device 5 and a cooling device 51 are installed on the side of the frame 1 away from the peeling unit 3. The drying device 5 dries the printed surface film, and the cooling device 51 cools the paper packaging to be laminated with the surface film. A laminating unit 33 is mounted on the side of the frame 1, located away from the unwinding roller 2 and located between the drying unit 5 and the cooling unit 51. This unit 33 can be comprised of two rollers positioned adjacent to each other, allowing the surface film and paper packaging passing therethrough to be pressed together and laminated. A reel 46 is rotatably connected to the end of the frame 1, away from the unwinding roller 2. This reel 46 is used to rewind the paper packaging after the surface film has been laminated.

[0048] Reference Figure 1 and Figure 2The drying device 5 includes a drying box 53 detachably connected to the frame 1 by bolts. The drying box 53 is provided with box openings 47 on both vertical sides. The surface film is horizontally passed through the two box openings 47 and is arranged in the drying box 53. Two vertical box partitions 55 are fixedly connected to the inside of the drying box 53. There is a gap between the lower part of the box partition 55 and the bottom of the drying box 53. The surface film is passed between the two box partitions 55. The drying box 53 is detachably connected to the two vertical inner walls. A horizontal drying plate 52, which can be an electric heating plate, is connected. It is located between two box partitions 55 and directly above the surface film, with a gap between the drying plate 52 and the two box partitions 55. A horizontal heat insulation board 56, which can be a color-coated steel sandwich panel, is detachably connected between the two vertical inner walls of the drying box 53. The heat insulation board 56 is located between the surface film and the drying plate 52, with a gap between the heat insulation board 56 and the two box partitions 55 to allow for air circulation. A guide fan 54 is detachably connected to the top of each of the two heat insulation boards 56. The two guide fans 54 blow the air between them to separate locations, causing the air in the middle of the upper part of the drying box 53 to flow to both sides of the upper part of the drying box 53. The projections of the two side edges of the heat insulation plate 56 close to the box partition 55 on the horizontal plane are located between the projections of the two side edges of the drying plate 52 close to the box partition 55 on the horizontal plane, so that a part of the air flowing upward through the heat insulation plate 56 will flow along the bottom surface of the drying plate 52, so that the drying plate 52 can heat the air in the drying box 53 more quickly.

[0049] Reference Figure 1 and Figure 3 The cooling device 51 includes a row of bottom rollers 57 rotatably connected to the frame 1 and located directly below and near the drying box 53. Several bottom rollers 57 are set in the horizontal transmission direction of the paper packaging. The bottom rollers 57 roll in contact with the side of the paper packaging away from the glue layer, that is, the lower surface of the paper packaging. A silicone rubber roller 58 rotatably connected to the frame 1 is installed directly above each bottom roller 57. The silicone rubber roller 58 rolls in contact with the glue layer of the paper packaging. A cooling roller 59 is in rolling contact between two adjacent silicone rubber rollers 58 and between two adjacent bottom rollers 57. That is, a row of cooling rollers 59 is set on the side away from a row of silicone rubber rollers 58 and a row of bottom rollers 57. The cooling rollers 59 are connected to an external pipeline and cooling water of a certain temperature is circulated into the cooling rollers 59 through an external water pump to reduce the temperature of the silicone rubber rollers 58 and the bottom rollers 57, thereby reducing the temperature of the paper packaging.

[0050] Reference Figure 4Several inner roller blades 45 are evenly and fixedly connected to the interior of the cooling roller 59 along its axis. These inner roller blades 45 are circular, with their axes aligned with the axis of the cooling roller 59. This minimizes the thickness of the cooling roller 59, improving heat transfer efficiency while also allowing the cooling roller 59 to withstand significant pressure without bending. Two adjacent inner roller blades 45 form a group. Within each group, a roller blade 45 is uniformly penetrated by several peripheral holes 31 along its axis. Within the same group, a roller blade 45 without peripheral holes 31 is coaxially penetrated by a central hole 32 at its center. This creates turbulent flow for the cooling water within the cooling roller 59, allowing the cooling water within the cooling roller 59 to absorb and remove as much heat as possible from the surface of the cooling roller 59.

[0051] Reference Figure 3 Each cooling roller 59 is rotatably connected to a roller frame 41. The vertical side surfaces of the roller frames 41 close to the two inner walls of the frame 1 are integrally formed with frame sliders 49. The frame sliders 49 are slidably connected to the inner wall of the frame 1 in the vertical direction. Several vertical frame springs 44 are fixedly connected to the inner wall of the frame 1. The bottom end of each frame spring 44 is fixedly connected to the frame slider 49, so that the roller frame 41 close to the silicone rubber roller 58 tends to move vertically downward, and the roller frame 41 close to the bottom roller 57 tends to move vertically upward. The two rows of roller frames 41 are close to the receiving rollers. A roller stand cylinder 42 with a vertical power rod is mounted on one side of each roller 46. The roller stand cylinder 42 has its own guide rod, and its power rod is detachably connected to a horizontal cylinder rod 34. Each roller stand 41 is fixedly connected to a coordinated rod 43 at the horizontal center point away from the corresponding cooling roller 59. The coordinated rod 43 may be T-shaped, with the vertical section of the coordinated rod 43 connected to the roller stand 41, and the horizontal section of the coordinated rod 43 closer to the cylinder rod 34 abutting the cylinder rod 34, allowing the coordinated rod 43 to be driven to move. Furthermore, within a row of coordinated rods 43 of similar height, the farther away from the corresponding cylinder rod 34, the longer the vertical section. This allows the roller stand cylinder 42, when connected to an external air source, to sequentially drive each roller stand 41 in the row to move vertically, thereby appropriately adjusting the cooling level of the paper packaging as needed.

[0052] The implementation principle of a packaging printing device in an embodiment of the present application is as follows: after the surface film of the paper packaging is peeled off, the surface film is printed and enters the drying box 53 for drying. At the same time, the paper packaging passes between a row of silicone rubber rollers 58 and a row of bottom rollers 57, so that the temperature of the paper packaging is appropriately reduced, and then the surface film with a relatively high temperature and the paper packaging with a relatively low temperature are pressed and laminated, and then reeled.

[0053] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A packaging and printing device, characterized in that: The invention comprises a frame (1), a reel (2) rotatably connected to the frame (1) and releasing the paper package, a peeling portion (3) provided on the frame (1) and peeling the adhesive layer and the surface film of the paper package, a printing roller portion (4) provided on the frame (1) and printing the surface film, a drying device (5) provided on the frame (1) and drying the printed side of the surface film, a cooling device (51) provided on the frame (1) and cooling the paper package, a compounding portion (33) provided on the frame (1) and pressing the dried surface film and the cooled paper package, and a reel (46) rotatably connected to the frame (1) and collecting the compounded paper package. The cooling device (51) includes a plurality of bottom rollers (57) rotatably connected to the frame (1) and in contact with the side of the paper package away from the glue layer, a plurality of silicone rubber rollers (58) rotatably connected to the frame (1) and in contact with the glue layer, and two rows of cooling rollers (59) that are in one-to-one contact with all the bottom rollers (57) and all the silicone rubber rollers (58) and have a cooling liquid circulating inside. The frame (1) is slidably connected to a roller frame (41) corresponding to each cooling roller (59), and the roller frame (41) is provided for the cooling roller (59) to rotate. The frame (1) is provided with a roller frame cylinder (42) corresponding to each row of roller frames (41) so that each row of roller frames (41) moves so that the spacing between the cooling roller (59) and the corresponding bottom roller (57) or silicone rubber roller (58) is changed. The roller frame cylinder (42) is provided for each row of roller frames (41). The roller frame cylinder (42) drives one of the edges of each row of roller frames (41) to move. Each roller frame (41) is provided with a coordination rod (43) so that each row of roller frames (41) corresponds to a row of coordination rods (43). Two adjacent coordination rods (43) in the same row can abut against each other. The farther away from the roller frame cylinder (42) in the same row, the longer the coordination rod (43) is. The frame (1) is provided with a frame spring (44) corresponding to each roller frame (41) so that the roller frame (41) moves toward the corresponding bottom roller (57) or silicone rubber roller (58).

2. The packaging and printing equipment according to claim 1, characterized in that: The drying device (5) comprises a drying box (53) provided on the frame (1) and for the surface film to enter, and a drying plate (52) provided in the drying box (53) and close to the surface film and heating the surrounding air. The drying box (53) is located above the paper packaging.

3. The packaging and printing equipment according to claim 2, characterized in that: The inner walls of the drying box (53) are provided with box partitions (55) in the middle and on both sides. The drying plate (52) is located between the two box partitions (55). The upper parts of the two box partitions (55) are provided with guide fans (54) for blowing the air in the middle of the drying box (53) to the sides of the drying box (53). There is a gap between the bottom of the box partition (55) and the bottom of the drying box (53).

4. The packaging and printing equipment according to claim 3, characterized in that: The drying plate (52) is located above the surface film, and a heat insulation plate (56) is fixedly connected to the drying box (53) and is located between the drying plate (52) and the surface film. There is a distance between the heat insulation plate (56) and the two box partitions (55).

5. The packaging and printing equipment according to claim 1, characterized in that: One of the cooling rollers (59) abuts against two adjacent bottom rollers (57) in the same group or two adjacent silicone rubber rollers (58) in the same group.

6. The packaging and printing equipment according to claim 1, characterized in that: A row of roller inner sheets (45) through which cooling liquid can pass is fixedly connected to the hollow interior of each cooling roller (59).

7. A packaging printing process applied to the packaging printing equipment according to claim 1, characterized in that: The specific steps include: Step 1: Unwind the paper packaging and peel off the adhesive layer and surface film on the paper packaging; Step 2: Printing is performed on the side of the film that is adhered to the adhesive layer; Step 3, drying the printed pattern on the film; Step 4: Laminate the printed surface and the adhesive layer of the film and roll it up.

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