A gravure printing device for cigarette wrapping paper

Abstract

The patent relates to the technical field of tobacco packaging, and particularly relates to a gravure printing device for tobacco packaging paper. The gravure printing device for the tobacco packaging paper comprises a printing plate roller, an ink roller and a distance control unit. The printing plate roller is used for contacting the paper to print a pattern. The ink roller is used for providing ink to the printing plate roller. The distance control unit is used for controlling the roller distance between the printing plate roller and the ink roller to adjust the ink thickness on the surface of the printing plate roller. The patent can accurately adjust the ink layer thickness to adapt to different printing inks and working environments by ink transmission between the ink roller and the printing plate roller and distance control based on the principle that the volume of the gravure mesh cell is positively correlated with the roller distance pressure, for example, adjusting the thickness of the ink layer to be 3-8 microns, so as to solve the color difference and uneven ink layer problem in cigarette package printing.

Description

Technical Field

[0001] This patent relates to the technical field of tobacco packaging, specifically to a gravure printing apparatus for tobacco packaging paper. Background Technology

[0002] A gravure printing unit typically consists of a printing plate roller, an impression roller, an ink supply system, a transmission system, and a frame. The design, manufacturing, installation, and commissioning of each part affect the final printing quality.

[0003] Printing presses typically operate continuously for extended periods. In existing technologies, factors such as the rotation speed of the gravure printing rollers, the amount of ink on the printing plate, and the instability of ink viscosity and concentration in the ink trough make it difficult for the ink to achieve uniform distribution under its own weight. This often results in incomplete ink agitation, leading to foaming or missed prints. At high ambient temperatures, the ink surface is prone to oxidation and skinning, producing deposits that cause uneven inking, damage to the gravure printing rollers, ink splatter, and blade pulling, ultimately affecting print quality and efficiency. Therefore, an ink-leveling roller is usually added to the ink trough to reduce air bubbles in the ink.

[0004] The ink-spreading roller is a roller in a printing press that evenly distributes ink onto the printing plate roller. In existing technologies, the distance between the ink-spreading roller and the printing plate roller is relatively fixed, which easily leads to quality defects such as ink smearing and ink trailing due to uneven rotation speeds between the two rollers, untimely ink application, and insufficient contact between the printing plate roller and the ink. However, unlike other printing processes, the inks used for tobacco packaging paper printing are diverse, and their flow properties, drying times, and other properties do not remain consistent between different batches, placing high demands on the environmental and material adaptability of gravure printing presses. In actual production, printing presses often fail to adapt well to these changes, resulting in various printing quality defects. This not only wastes raw materials and energy and increases production costs, but also pollutes the environment due to improper use and disposal of inks. Utility Model Content

[0005] The purpose of this patent is to improve the printing effect of gravure printing equipment for cigarette packaging paper, and to solve this technical problem:

[0006] The first aspect of this patent provides a gravure printing apparatus for cigarette packaging paper, comprising: a printing plate roller, an ink distribution roller, and a spacing control unit; the printing plate roller is used to contact the paper to print a pattern; the ink distribution roller is used to supply ink to the printing plate roller; and the spacing control unit is used to control the roller spacing between the printing plate roller and the ink distribution roller to adjust the ink thickness on the surface of the printing plate roller.

[0007] Furthermore, the spacing control unit includes a horizontal adjuster, which includes a slide rail and a slider; the slider is fixedly connected to the ink distribution roller; the slide rail is fixedly connected to the printing plate roller; and the slider is slidably disposed on the slide rail.

[0008] Furthermore, the level adjuster also includes a limit block, which is fixedly mounted on the front end of the slide rail.

[0009] Furthermore, the level adjuster also includes a drive mechanism; the drive mechanism is used to displace or maintain the position of the slider on the slide rail.

[0010] Furthermore, the drive mechanism includes an adjustment handle; the adjustment handle is connected to the slider and the slide rail, and adjusting the adjustment handle can cause the slider to move on the slide rail.

[0011] Furthermore, the gravure printing apparatus also includes an ink tank for holding ink and supplying ink to the printing plate roller;

[0012] Furthermore, the spacing control unit is located outside the ink tank.

[0013] Furthermore, the gravure printing apparatus also includes a fixed support base, which is disposed outside the ink tank and fixedly connected to the ink tank;

[0014] Furthermore, the spacing control unit is mounted on a fixed support.

[0015] Furthermore, the spacing control unit includes a first spacing control unit and a second spacing control unit;

[0016] Furthermore, the first spacing control unit is located at the first end of the ink tank, and the second spacing control unit is located at the second end of the ink tank.

[0017] Furthermore, the gravure printing apparatus also includes a controller, a printing plate roller drive motor, and an ink distribution roller drive motor; the printing plate roller drive motor is used to drive the printing plate roller to rotate, and the ink distribution roller drive motor is used to drive the ink distribution roller to rotate.

[0018] The controller, the printing plate roller drive motor, and the ink distribution roller drive motor are electrically connected. The controller adjusts the speed of the ink distribution roller according to the speed of the printing plate roller.

[0019] Furthermore, the gravure printing apparatus also includes a splash guard, which is fixedly mounted above the ink trough near the end of the printing plate roller.

[0020] To ensure uniform ink distribution and flow control during the printing process, thereby improving printing quality and efficiency, the ink must first be applied through the ink distribution roller system of the printing press under certain pressure and speed. The core technology of ink distribution lies in designing and adjusting the structure and parameters of the ink distribution roller to ensure that the ink is evenly dispersed and transported during the printing process.

[0021] Specifically, ink distribution technology involves adjusting and optimizing aspects such as the angle, spacing, material, surface treatment, and operating speed of the ink distribution rollers. This includes altering the ink flow rate and dispersion effect within the ink roller system by adjusting the angle and spacing of the rollers; enhancing the ink's adsorption and friction by selecting appropriate roller materials and surface treatments to improve ink uniformity; and connecting the rollers to a fixed support base, with the rollers driven by a continuously variable motor, allowing for real-time adjustment of the roller speed according to the printing speed to control ink distribution speed and ink volume, thus preventing defects such as missed printing and ink spillage.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] This patented technology uses the contact between the ink distribution roller and the printing plate roller to transfer ink. With the help of spacing control, it can precisely adjust the ink layer thickness based on the principle that the volume of the gravure cell is positively correlated with the pressure between the rollers to adapt to different printing inks and working environments. For example, the ink layer thickness can be adjusted to 3-8μm to solve the problems of color difference and uneven ink layer in cigarette packaging printing. Attached Figure Description

[0024] The above content of this patent and the following detailed embodiments will be better understood when read in conjunction with the accompanying drawings. It should be noted that the drawings are merely examples of the claimed technical solution.

[0025] Figure 1 A side view schematic diagram of a specific embodiment of a gravure printing apparatus for cigarette packaging paper;

[0026] Figure 2 A front view schematic diagram of a specific embodiment of a gravure printing apparatus for cigarette packaging paper;

[0027] Figure 3 for Figure 1 Enlarged view of point A in the middle.

[0028] The reference numerals in the attached figures are explained as follows:

[0029] 100: Ink distribution roller;

[0030] 200: Fixed support base;

[0031] 210: First fixed support;

[0032] 220: Second fixed support;

[0033] 300: Level adjuster;

[0034] 310: First level adjuster;

[0035] 311: First limit block;

[0036] 312: First slider;

[0037] 313: First slide rail;

[0038] 320: Second level adjuster;

[0039] 400: Adjustment handle;

[0040] 410: First adjusting handle;

[0041] 420: Second adjustment handle;

[0042] 500: Ink tank;

[0043] 600: Servo motor;

[0044] 700: 90° reversing angle gear;

[0045] 810: First aluminum alloy eccentric compensation quick-release coupling;

[0046] 820: Second aluminum alloy eccentric compensation quick-release coupling;

[0047] 900: Bearing housing;

[0048] 1000: Printing roller. Detailed Implementation

[0049] The detailed features and advantages of this application are described below in the specific embodiments. The content of this description is sufficient to enable any person skilled in the art to understand the technical content of this application and implement it accordingly. Based on the specification, claims and drawings disclosed in this specification, a person skilled in the art can easily understand the related objectives and advantages of this application.

[0050] This patent will now be described with reference to the accompanying drawings, in which similar reference numerals denote similar elements. While specific structures and arrangements are discussed, it should be understood that this is done merely for illustrative purposes. Those skilled in the art will recognize that other structures and arrangements can be used without departing from the spirit and scope of this patent. It will be clear to those skilled in the art that this patent can also be used in a variety of other applications.

[0051] In this specification and claims, several terms will be used, and unless otherwise indicated, these terms will be defined to have the following meanings:

[0052] The singular forms “a” and “the” include their corresponding plural forms. “At least one” means one or more, and “more” means two or more. “At least one of the following” or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can be expressed as: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0053] All figures used to represent physical quantities should be considered to be, in all cases, modified by the terms "within the unavoidable margin of error" or "approximately". Therefore, the numerical values ​​presented herein are approximations and may vary depending on the desired properties sought to be obtained by this patent. The principles of equivalents, which are applied to a minimum and not intended to limit the scope of the claims, should be applied, for example, each value should be interpreted at least according to the reported significant digits and by applying conventional rounding techniques.

[0054] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. A and B can be singular or plural. Additionally, the character " / " in this article generally indicates an "or" relationship between the preceding and following related objects, but it can also represent an "and / or" relationship. Please refer to the context for a more accurate understanding.

[0055] All other terms used herein for special definition are intended to have the general meaning understood by one of ordinary skill in the art, and in particular, meaning that one of ordinary skill in the art, upon reading the claims, specification and drawings of this patent, can directly and without doubt determine how the technical solution of this patent can be implemented.

[0056] Even if there are incomplete descriptions, omissions, or ambiguities in the grammar, words, punctuation, graphics, symbols, etc. of the claims, specification, and drawings of this patent, a person skilled in the art can still arrive at the only correct understanding by reading the claims, specification, and drawings as a whole without extensive reasoning or experimentation, and effectively exclude various incorrect interpretations that are not aimed at achieving the purpose of this patent.

[0057] Those skilled in the art would first choose to read the claims, specification, and drawings of this patent to reasonably interpret the terms; secondly, they would choose to refer to the relevant definitions in other documents published by the applicant before the filing date to reasonably interpret the terms; thirdly, they would choose the references cited in this patent to reasonably interpret the terms; and finally, they would choose to combine the technical dictionaries, technical manuals, reference books, textbooks, national or industry technical standards, etc., commonly used by those skilled in the art to reasonably interpret the terms.

[0058] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0059] like Figure 1 , 2 3. This patent provides a specific embodiment of a gravure printing apparatus for cigarette packaging paper, comprising: a printing plate roller 1000, an ink distribution roller 100, and a spacing control unit; the printing plate roller 1000 is used to contact the paper to print a pattern; the ink distribution roller 100 is used to supply ink to the printing plate roller 1000; and the spacing control unit is used to control the roller spacing between the printing plate roller 1000 and the ink distribution roller 100 to adjust the ink thickness on the surface of the printing plate roller 1000.

[0060] In gravure printing, the uniformity of ink transfer directly affects the quality of cigarette pack patterns. By setting a spacing control unit, this patent controls the ink transfer spacing between the ink distribution roller 100 and the printing plate roller 1000. Based on the principle that the volume of the gravure cell is positively correlated with the pressure between the rollers, the ink layer thickness can be precisely adjusted to adapt to different printing inks and working environments. For example, the ink layer thickness can be adjusted to 3-8μm to solve the problems of color difference and uneven ink layer in cigarette pack printing.

[0061] The spacing control unit includes a horizontal adjuster 300, which comprises a slide rail and a slider. The slider is fixedly connected to the inking roller 100; the slide rail is fixedly connected to the printing plate roller 1000; and the slider is slidably disposed on the slide rail. This horizontal adjuster 300 has a simple structure and reliable positioning performance. Precise adjustment of the roller spacing between the printing plate roller 1000 and the inking roller 100 can be achieved by sliding the slider on the slide rail. Preferably, the horizontal adjuster 300 also includes a limiting block, which is fixedly disposed at the front end of the slide rail. This limiting block reduces the risk of displacement during equipment operation, limits the slider's position, and improves the stability of the slide rail.

[0062] To control the distance between the two ends of the ink distribution roller 100 and the two ends of the printing plate roller 1000 respectively, the distance control unit preferably includes a first distance control unit and a second distance control unit; the first distance control unit is disposed at the first end of the ink tank 500, and the second distance control unit is disposed at the second end of the ink tank 500. For example, the level adjuster 300 includes a first level adjuster 310 and a second level adjuster 320.

[0063] Specifically, the first level adjuster 310 includes a first limiting block 311, a first slide rail 313, and a first slide rail 312. The first slider 312 is fitted onto the first slide rail 312 and can slide on it. When the first slider 312 moves forward to its limit position, it abuts against the first limiting block 311. The second level adjuster 320 has the same structure as the first level adjuster 310.

[0064] The level adjuster 300 also includes a drive mechanism for displacing or maintaining the position of the slider on the slide rail. A typical drive mechanism includes an adjustment handle 400 connected to the slider and the slide rail; adjusting the adjustment handle 400 displaces the slider on the slide rail. Other embodiments of the drive mechanism include, for example, electrically controlled or electrically operated actuators.

[0065] The gravure printing apparatus also includes an ink tank 500, which holds ink and supplies ink to the printing plate roller 1000. A spacing control unit is located outside the ink tank 500. The gravure printing apparatus also includes a fixed support 200, which is located outside the ink tank 500 and fixedly connected to it; the spacing control unit is located on the fixed support 200. The ink tank 500 is prior art in the art; it is fixedly mounted on the frame, typically in a position relatively fixed to the printing plate roller 1000. Fixing the spacing control unit on it is easily implemented, ensuring structural stability, reducing vibration interference, and facilitating maintenance.

[0066] Preferably, the gravure printing apparatus further includes a controller (not shown), a printing plate roller drive motor (not shown), and an ink distribution roller drive motor; the printing plate roller 1000 drive motor is used to drive the printing plate roller 1000 to rotate, and the ink distribution roller 100 drive motor is used to drive the ink distribution roller 100 to rotate; the controller, the printing plate roller 1000 drive motor, and the ink distribution roller 100 drive motor are electrically connected, and the controller adjusts the rotational speed of the ink distribution roller 100 according to the rotational speed of the printing plate roller 100. For example, in use, the continuously variable servo motor 600 located at one end of the ink distribution roller 100 dynamically and synchronously adjusts its rotational speed according to the rotational speed of the printing plate roller drive motor.

[0067] To make the overall device more compact, the servo motor 600 can be set perpendicular to the ink distribution roller 100 and connected to the ink distribution roller 100 via a 90° reversing angle gear 700. For example, the 90° reversing angle gear 700 is connected to the ink distribution roller 100 via a first aluminum alloy eccentric compensation quick-release coupling 810.

[0068] The other end of the ink-distributing roller 100 is connected to the bearing in the bearing housing 900 via a second aluminum alloy eccentric compensation quick-release coupling 820, so as to make the rotation of the ink-distributing roller 100 more stable and smooth. The servo motor, together with the quick-release coupling, can adapt to the frequent needs of cigarette pack printing plate changes.

[0069] Preferably, the gravure printing apparatus also includes a splash guard, which is fixedly mounted above the ink trough 500 near the end of the printing plate roller 1000. During high-speed printing (>100m / min), the splash guard creates a low-pressure zone through the Bernoulli effect, guiding the splashed ink back into the ink trough 500, reducing ink loss and preventing contamination of the white edges of the cigarette pack paper. The splash guard structure ensures production safety, for example, by reducing the evaporation of benzene-based solvents.

[0070] The description in this specification references Marks' Standard Handbook for Mechanical Engineers (11th edition and other editions prior to the filing date of this application), published by McGraw-Hill, Inc.; DeGarmo's Materials and Processes in Manufacturing (13th edition and other editions prior to the filing date of this application), published by Wiley; Machinery's Handbook (32nd edition and other editions prior to the filing date of this application), published by Industrial Press Inc.; Mechanical Design Handbook (6th edition and other editions prior to the filing date of this application), edited by Cheng Daxian, published by Chemical Industry Press; and Modern Mechanical Design Handbook (6th edition and other editions prior to the filing date of this application), edited by Wen Bangchun, published by Machinery Industry Press.

[0071] In the several embodiments provided in this application, it should be understood that the disclosed devices, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed.

[0072] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0073] In this specification, references to "an embodiment" or "a specific implementation" mean that a particular feature, structure, or characteristic described in connection with that embodiment / specific implementation is included in at least one embodiment / specific implementation of the present invention.

[0074] Therefore, the phrase "in one embodiment / specification" appearing in various places in this specification does not necessarily refer to the same embodiment / setting, but rather to possible. Furthermore, specific features, structures, or characteristics may be combined in one or more embodiments / settings in any suitable manner, as may be understood by those skilled in the art from this disclosure.

[0075] Similarly, it should be understood that in the above description of exemplary embodiments / specific implementations of this utility model, various features of this utility model are sometimes combined in a single embodiment / specific implementation or its figures and description, with the aim of simplifying the disclosure and aiding in the understanding of one or more of the various utility aspects. However, except for expressly stated instructions to the contrary or obvious technical contradictions or exclusions, the method of description in this patent should not be construed as reflecting an intention that the claimed utility model claims more features than are expressly stated in each claim. Rather, the utility aspect reflected in the claims lies in not all features of a single foregoing disclosed embodiment / specific implementation. Therefore, the claims following the detailed description are expressly incorporated herein by reference, and each claim exists independently as a separate embodiment / specific implementation of this utility model.

[0076] Furthermore, while some embodiments / specific implementations described herein include, but are not limited to, other features included in other embodiments / specific implementations, combinations of features from different embodiments / specific implementations are intended to fall within the scope of this invention and form different embodiments / specific implementations, as will be understood by those skilled in the art. For example, in the following claims, any embodiment / specific implementation of any claim can be used in any combination.

[0077] The terms and expressions used in this specification are for illustrative purposes and not for limitation. The use of these terms and expressions is not intended to exclude any equivalents of the features or portions thereof shown and described, but rather to allow for various modifications that may be made within the scope of the claims of this invention.

[0078] Therefore, it should be understood that although the present invention has been specifically disclosed through preferred embodiments, exemplary embodiments and optional features, those skilled in the art may take variations or modifications of the concepts disclosed in this specification, and such variations and modifications are therefore considered to be within the scope of the present invention as defined by the appended claims.

[0079] The specific embodiments given in this specification are examples of useful implementations of this utility model. It will be obvious to those skilled in the art that this utility model can be implemented using many variations of the equipment, equipment components, and method steps disclosed in this specification.

[0080] The foregoing description of specific embodiments has fully disclosed the general features of this invention, enabling others to easily modify and / or adapt such embodiments for various applications by applying knowledge within the scope of the art, without excessive experimentation or deviation from the general concept of this invention. Therefore, based on the teachings and guidance provided herein, it is intended that such modifications and alterations be included within the meaning and scope of equivalents of the disclosed embodiments. It should be understood that the wording or terminology used herein is for descriptive purposes and not intended to be limiting; thus, the wording or terminology in this specification will be interpreted by those skilled in the art based on the foregoing teachings and guidance.

[0081] Furthermore, the scope of this invention should not be limited to any of the exemplary embodiments described above, but only to the appended claims and their equivalents.

Claims

1. A gravure printing apparatus for cigarette packaging paper, characterized in that, include: Printing plate roller, ink distribution roller, and spacing control unit; The printing roller is used to contact the paper to print a pattern; The ink distribution roller is used to supply ink to the printing plate roller; The spacing control unit is used to control the spacing between the printing plate roller and the ink distribution roller to adjust the ink thickness on the surface of the printing plate roller.

2. The gravure printing apparatus according to claim 1, characterized in that, The spacing control unit includes a horizontal adjuster, which includes a slide rail and a slider; The slider is fixedly connected to the ink distribution roller; The slide rail is fixedly connected to the printing plate roller; The slider is slidably mounted on the slide rail.

3. The gravure printing apparatus according to claim 2, characterized in that, The level adjuster also includes a limiting block, which is fixedly disposed at the front end of the slide rail.

4. The gravure printing apparatus according to claim 2, characterized in that, The level adjuster also includes a drive mechanism; The drive mechanism is used to displace or maintain the position of the slider on the slide rail.

5. The gravure printing apparatus according to claim 4, characterized in that, The drive mechanism includes an adjustment handle; The adjusting handle is connected to the slider and the slide rail. Adjusting the adjusting handle will cause the slider to move on the slide rail.

6. The gravure printing apparatus according to claim 1, characterized in that, The gravure printing apparatus further includes an ink tank for holding the ink and supplying the ink to the printing plate roller; The spacing control unit is located outside the ink tank.

7. The gravure printing apparatus according to claim 6, characterized in that, The gravure printing apparatus further includes a fixed support base, which is disposed outside the ink tank and fixedly connected to the ink tank. The spacing control unit is disposed on the fixed support base.

8. The gravure printing apparatus according to claim 5, characterized in that, The spacing control unit includes a first spacing control unit and a second spacing control unit; The first spacing control unit is disposed at the first end of the ink tank, and the second spacing control unit is disposed at the second end of the ink tank.

9. The gravure printing apparatus according to claim 1, characterized in that, The gravure printing apparatus further includes a controller, a printing plate roller drive motor, and an ink distribution roller drive motor; the printing plate roller drive motor is used to drive the printing plate roller to rotate, and the ink distribution roller drive motor is used to drive the ink distribution roller to rotate. The controller, the printing plate roller drive motor, and the ink distribution roller drive motor are electrically connected. The controller adjusts the rotation speed of the ink distribution roller according to the rotation speed of the printing plate roller.

10. The gravure printing apparatus according to claim 1, characterized in that, The gravure printing apparatus also includes a splash guard, which is fixedly installed above the ink tank near the end of the printing plate roller.

Images