A plate roller for GRC surface gravure printing

Abstract

This utility model discloses a printing roller for gravure printing on GRC surfaces, relating to the technical field of printing rollers. It includes a cylindrical shell; an annular sleeve fitted onto the cylindrical shell with an intaglio pattern formed on its outer surface for printing on materials; two pairs of limiting shells, both fixedly installed on the outer surface of the cylindrical shell; and two pairs of limiting slots, both formed on the inner surface of the annular sleeve and slidably connected to the two pairs of limiting shells. The replaceable annular sleeve structure allows users to replace only the annular sleeve with a specific intaglio pattern without disassembling and replacing the entire heavy printing roller body. This completely solves the core problem of inconvenient replacement due to the large mass of the printing roller, greatly reducing downtime required for changing printing patterns, and improving the flexibility and production efficiency of printing operations. It is especially suitable for scenarios requiring frequent changes in printing patterns.

Description

Technical Field

[0001] This utility model relates to the technical field of printing rollers, specifically a printing roller for gravure printing on GRC surfaces. Background Technology

[0002] Printing is a technology that mass-produces original artwork, such as text, pictures, photographs, and anti-counterfeiting materials, by transferring ink to the surface of materials like paper, textiles, plastics, leather, PVC, and PC through processes like plate making, inking, and pressure application. Printing involves transferring approved printing plates onto the substrate using printing machinery and specialized inks. Plate rollers, also called steel rollers, are divided into hollow and solid rollers, and rollers with and without shafts. They are generally used for plate making. The surface of the roller is copper-plated, and the pattern is engraved using a gravure electronic engraving machine, then plated with a layer of chromium. After completion, they are delivered to the printing plant and are commonly used in printing operations on plastic packaging.

[0003] However, the problem with existing printing rollers is that printing presses usually need to replace the entire printing roller with different engraved graphics when printing different graphics. Due to the large mass of the printing rollers, replacement is inconvenient. Utility Model Content

[0004] To solve the above problems, that is, to address the issues raised in the background art, this utility model proposes a printing roller for gravure printing on GRC surfaces, comprising:

[0005] Cylindrical shell;

[0006] An annular sleeve is fitted onto the cylindrical shell, and an intaglio print is formed on its outer surface for printing on materials.

[0007] Two pairs of limiting shells are fixedly installed on the outer surface of the cylindrical shell;

[0008] There are two pairs of limiting slots, both formed on the inner surface of the annular sleeve, and each slidably connected to one of the two pairs of limiting shells.

[0009] A locking mechanism is provided on the limiting shell and is used to lock the position of the annular sleeve.

[0010] Preferably, the locking mechanism includes:

[0011] Several sliding openings are formed on the sidewall of the limiting shell;

[0012] A number of locking grooves are formed on the inner wall surface of the limiting through groove;

[0013] The locking rod is slidably installed in the sliding opening, with one end located in the limiting shell and the other end inserted into the locking groove;

[0014] A tension spring is wound and installed on the outer surface of the locking rod, with one end fixedly connected to the inner wall of the slide and the other end fixedly connected to the outer surface of the locking rod.

[0015] A drive mechanism, located on the cylindrical shell, is used to drive the locking rod to move.

[0016] Preferably, the drive mechanism includes;

[0017] There are two pairs of openings, each formed inside the outer wall of the cylindrical shell, and each communicating with one of the two pairs of limiting shells;

[0018] The drive plate is slidably installed in the through-hole, with one end located inside the cylindrical shell and the other end extending into the limiting shell and its outer surface contacting one end of the locking rod.

[0019] A rubber airbag is disposed inside the cylindrical shell;

[0020] An arc-shaped plate is fixedly installed on one end face of the drive plate located inside the cylindrical shell, and its inner surface is bonded to the outer surface of the rubber airbag.

[0021] A connecting tube is provided through the outer wall of the cylindrical shell, and one end is fixedly connected to the rubber airbag;

[0022] The valve is fixedly installed on one end of the connecting pipe located on the outside of the cylindrical shell.

[0023] Preferably, a groove is formed on the inner wall of the opening, and a slider that is slidably connected to the groove is fixedly installed on the outer surface of the drive plate.

[0024] Preferably, the end of the drive plate located inside the limiting shell is V-shaped.

[0025] The beneficial technical effects of this utility model are as follows:

[0026] 1. It adopts a replaceable ring sleeve structure. Users only need to replace the ring sleeve with a specific gravure pattern, without disassembling and replacing the entire heavy printing roller body. This completely solves the core problem of inconvenient replacement due to the large mass of the printing roller, greatly shortens the downtime required to change the printing pattern, and improves the flexibility and production efficiency of printing operations. It is especially suitable for scenarios that require frequent switching of printing patterns.

[0027] 2. Modular design reduces replacement costs and operational difficulty. Expensive engraving and gravure patterns are concentrated on the ring sleeve, while the cylindrical shell serves as a universal and reusable base. Users only need to customize or stock ring sleeves with different patterns according to their needs, without the need to equip an entire printing roller for each pattern. This significantly reduces equipment investment costs. The replacement operation only involves the disassembly and installation of the ring sleeve. Compared with replacing the entire roller, the physical requirements and operational complexity of the operator are greatly reduced, making it safer and more convenient. At the same time, the ring sleeve is small in size and light in weight, making storage and transportation more convenient and economical.

[0028] 3. Through the sliding fit between the limiting shell and the limiting through groove, as well as the locking mechanism, the axial and circumferential positions of the ring sleeve on the cylindrical shell are precisely fixed, effectively preventing the ring sleeve from moving axially or rotating circumferentially during the printing process, thus ensuring the registration accuracy of the printed pattern and the stability of the printing quality.

[0029] 4. The locking mechanism adopts an innovative airbag-driven design. The rubber airbag is inflated or deflated through the connecting tube, which drives the arc plate to move the drive plate, thereby controlling the locking rod to insert or exit the locking groove. The V-shaped end design of the drive plate optimizes the contact with the locking rod and improves the driving efficiency. Attached Figure Description

[0030] Figure 1 A schematic diagram of the front view structure of this utility model is shown.

[0031] Figure 2 A side sectional view of the present invention is shown.

[0032] Figure 3 This utility model is shown Figure 2 A magnified structural diagram of part A.

[0033] Figure 4 A schematic diagram of the drive board of this utility model is shown.

[0034] The attached diagram includes the following reference numerals: 1. Cylindrical shell; 2. Annular sleeve; 3. Limiting shell; 4. Limiting through groove; 5. Slide opening; 6. Locking groove; 7. Locking rod; 8. Tension spring; 9. Through opening; 10. Drive plate; 11. Rubber airbag; 12. Arc plate; 13. Connecting pipe; 14. Valve; 15. Slide groove; 16. Slider. Detailed Implementation

[0035] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0036] This utility model proposes a printing roller for gravure printing on GRC surfaces, comprising:

[0037] Cylindrical shell 1;

[0038] The annular sleeve 2 is fitted onto the cylindrical shell 1, and an intaglio print is formed on its outer surface for printing on materials.

[0039] The limiting shell 3, in pairs, is fixedly installed on the outer surface of the cylindrical shell 1;

[0040] There are two pairs of limiting grooves 4, both formed on the inner surface of the annular sleeve 2, and each slidingly connected to one of the two pairs of limiting shells 3.

[0041] A locking mechanism, located on the limiting shell 3, is used to lock the position of the annular sleeve 2;

[0042] The cylindrical shell 1, as the core support of the printing roller, has a hollow cylindrical structure and provides a mounting base for other functional components. A rotating shaft is fixedly installed at the center point of both ends of the cylindrical shell 1. A pair of rotating shafts are connected to the printing press, so that the printing press can drive the pair of rotating shafts and the cylindrical shell 1 to rotate. At the same time, the printing press is existing technology, so it will not be described in detail here.

[0043] The annular sleeve 2 is detachably fitted onto the outer surface of the cylindrical shell 1. Its outer surface is engraved with a specific intaglio pattern, which directly undertakes the printing function on materials such as GRC plates.

[0044] There are two pairs of four limiting shells 3, which are fixedly installed on the outer surface of the cylindrical shell 1 and symmetrically distributed along the axial direction. Their function is to provide axial and circumferential positioning references for the annular sleeve 2.

[0045] There are two pairs of four limiting slots 4, which are opened on the inner surface of the annular sleeve 2. Each limiting slot 4 forms a sliding pair with the corresponding limiting shell 3 to ensure that the annular sleeve 2 is accurately assembled along the cylindrical shell 1.

[0046] The locking mechanism is integrated into the limiting shell 3 and is used to securely lock the position of the annular sleeve 2 after it is assembled in place, preventing displacement during the printing process.

[0047] Specifically, the locking mechanisms include:

[0048] Several sliding openings 5 ​​are formed on the side wall of the limiting shell 3;

[0049] Locking grooves 6, in several quantities, are all formed on the inner wall surface of the limiting through groove 4;

[0050] The locking rod 7 is slidably installed in the sliding opening 5, with one end located in the limiting shell 3 and the other end inserted into the locking groove 6;

[0051] A tension spring 8 is wound and installed on the outer surface of the locking rod 7, with one end fixedly connected to the inner wall of the slide 5 and the other end fixedly connected to the outer surface of the locking rod 7.

[0052] The drive mechanism, located on the cylindrical shell 1, is used to drive the locking lever 7 to move.

[0053] The sliding opening 5 passes through the through hole opened in the side wall of the limiting shell 3, providing a precise sliding track for the locking rod 7 and restricting its direction of movement;

[0054] Locking grooves 6 are evenly distributed on the inner wall of the limiting through groove 4, and the end of the locking rod 7 is inserted to form a mechanical interlock;

[0055] The locking rod 7 slides through the sliding opening 5. When locking the annular sleeve 2, the outer end is inserted into the locking groove 6 to fix the annular sleeve 2. When unlocking the annular sleeve 2, the outer end retracts into the sliding opening 5 and disengages from the locking groove 6 to unlock the annular sleeve 2. At the same time, the inner end of the locking rod 7 extends into the cavity inside the limiting shell 3 and contacts the driving mechanism.

[0056] The tension spring 8 is coaxially wound around the outer surface of the locking rod 7. One end is fixedly connected to the inner wall of the sliding opening 5, and the other end is fixedly connected to the outer surface of the locking rod 7. When the tension spring 8 is in the tension state, it provides a restoring force to drive the locking rod 7 to slide into the limiting shell 3, so that one end of it separates from the locking groove 6. When locking the annular sleeve 2, the external force overcomes the tension of the tension spring 8, causing the locking rod 7 to slide out of the limiting shell 3 and insert into the locking groove 6.

[0057] The drive mechanism is integrated inside the cylindrical shell 1. It can apply a pushing force to the end of the locking rod 7 located inside the limiting shell 3, forcing it to slide, and causing the end located outside the limiting shell 3 to be inserted into the locking groove 6.

[0058] Specifically, the drive mechanism includes;

[0059] There are two pairs of openings 9, each formed inside the outer wall of the cylindrical shell 1, and each connected to one of the two pairs of limiting shells 3.

[0060] The drive plate 10 is slidably installed in the through port 9, with one end located in the cylindrical shell 1 and the other end extending into the limiting shell 3 and its outer surface contacting one end of the locking rod 7.

[0061] A rubber airbag 11 is disposed inside the cylindrical shell 1;

[0062] The arc-shaped plate 12 is fixedly installed on one end face of the drive plate 10 located inside the cylindrical shell 1, and its inner surface is bonded to the outer surface of the rubber airbag 11.

[0063] The connecting pipe 13 is installed through the outer wall of the cylindrical shell 1, and one end is fixedly connected to the rubber airbag 11.

[0064] Valve 14 is fixedly installed on one end of the connecting pipe 13 located on the outside of the cylindrical shell 1;

[0065] There are two pairs of ports 9, totaling four channels, all of which penetrate the outer wall of the cylindrical shell 1. The two pairs of ports 9 are connected to the inner cavities of the two pairs of limiting shells 3 respectively, which can provide a sliding path for the drive plate 10 and transmit driving force to the locking rod 7.

[0066] The drive plate 10 is slidably disposed in the through opening 9. One end is located in the cylindrical shell 1 and is fixedly connected to the outer surface of the arc plate 12. The other end extends into the limiting shell 3. When sliding into the limiting shell 3, the outer surface of the end located in the limiting shell 3 can contact the end of the locking rod 7 located in the limiting shell 3 and push the locking rod 7 so that one end of the locking rod 7 is inserted into the locking groove 6.

[0067] The rubber airbag 11 is located in the internal cavity of the cylindrical shell 1. When inflated, the rubber airbag 11 expands and generates radial expansion force, which drives the arc plate 12 to move closer to the inner wall of the cylindrical shell 1, causing the arc plate 12 to drive the drive plate 10 to move. When deflated, the airbag elastically contracts and returns to its original shape, which drives the arc plate 12 to move away from the inner wall of the cylindrical shell 1.

[0068] The arc plate 12 is fixed to one end face of the drive plate 10 located inside the cylindrical shell 1, and can be fixed relatively. At the same time, its inner curved surface is bonded to the outer wall surface of the rubber airbag 11, which can convert the radial expansion force of the rubber airbag 11 into a thrust on the drive plate 10. The arc-shaped fitting design can avoid stress concentration.

[0069] The connecting tube 13 penetrates the side wall of the cylindrical shell 1, with one end fixedly connected to the rubber airbag 11 and the other end extending to the outside of the cylindrical shell 1.

[0070] Valve 14 is a manual or electromagnetic control valve, which is fixedly installed at the port of the connecting pipe 13 located on the outside of the cylindrical shell 1. When it is open, it allows an external air source to inflate or depressurize the rubber air bag 11. When it is closed, it can maintain a constant pressure inside the rubber air bag 11.

[0071] Specifically, a groove 15 is formed on the inner wall surface of the through 9, and a slider 16 that is slidably connected to the groove 15 is fixedly installed on the outer surface of the drive plate 10.

[0072] The slide groove 15 is a guide groove formed on the inner wall surface of the through opening 9;

[0073] The slider 16 is fixed on the surface of the drive plate 10 and forms a sliding pair with the slide groove 15, which can constrain the movement trajectory of the drive plate 10 and prevent deflection and jamming.

[0074] Specifically, the end of the drive board 10 located inside the limiting shell 3 is V-shaped;

[0075] The end of the drive plate 10 extending into the inner cavity of the limiting shell 3 is machined into a symmetrical V-shaped wedge, which is formed by the intersection of two inclined planes. The V-shaped double inclined planes simultaneously apply force to the locking rods 7 on both sides, automatically compensating for manufacturing tolerances, ensuring that all locking rods 7 move synchronously, and avoiding jamming on one side.

[0076] Working principle: When replacing the annular sleeve 2, firstly, disconnect one shaft on one end face of the cylindrical shell 1 from the connecting mechanism on the printing machine, while keeping the other shaft connected to the printing machine, so that the cylindrical shell 1 and the annular sleeve 2 are in a horizontal state. At this time, connect the external air extraction device to the valve 14, open the valve 14, and let the external air extraction device draw air from the rubber airbag 11, causing the rubber airbag 11 to contract. When it contracts, it can drive the arc plate 12 to move. At this time, the V-shaped end of the arc plate 12 separates from the end of the locking rod 7 located in the limiting shell 3. At this time, the tension spring 8 can apply a pulling force to the locking rod 7, causing one end of the locking rod 7 to separate from the locking groove 6. Then, slide the annular sleeve 2 axially to remove it from the cylindrical shell 1, and then put the new annular sleeve 2 on top. The ring sleeve 2 is fitted onto the cylindrical shell 1, and the limiting shell 3 is inserted into the limiting through groove 4. At this time, the external air extraction device is removed from the valve 14, and the external air source is connected to the valve 14, so that the external air source delivers air through the valve 14 and the connecting pipe 13 to the rubber air bag 11 and inflates it. At this time, the rubber air bag 11 expands and pushes the arc plate 12 to expand radially. One end of the drive plate 10 slides into the limiting shell 3, and the V-shaped end of the drive plate 10 presses against the inner end of the locking rod 7, so that the locking rod 7 overcomes the tension of the tension spring 8 and slides out of the sliding mouth 5, and one end is inserted into the locking groove 6, thus completing the installation and locking of the new ring sleeve 2. At this time, the rotating shaft on the cylindrical shell 1, which is separated from the printing machine, is reconnected to the printing machine so that the ring sleeve 2 can continue to print on the material.

[0077] Although the present invention has been described with reference to preferred embodiments, various modifications can be made to it and components can be replaced with equivalents without departing from the scope of the present invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0078] In the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0079] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0080] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0081] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A printing roller for gravure printing on GRC surfaces, characterized in that, include; Cylindrical shell (1); An annular sleeve (2) is fitted onto the cylindrical shell (1), and an intaglio print is formed on its outer surface for printing on materials; The limiting shells (3) are in pairs and are fixedly installed on the outer surface of the cylindrical shell (1); There are two pairs of limiting through grooves (4), both formed on the inner surface of the annular sleeve (2), and each slidingly connected to the two pairs of limiting shells (3); A locking mechanism is provided on the limiting shell (3) for locking the position of the annular sleeve (2).

2. The printing roller for gravure printing on GRC surface according to claim 1, characterized in that, The locking mechanism includes: Several sliding openings (5) are formed on the side wall of the limiting shell (3); Locking grooves (6), in several quantities, are all formed on the inner wall surface of the limiting through groove (4); The locking rod (7) is slidably installed in the sliding opening (5), with one end located in the limiting shell (3) and the other end inserted into the locking groove (6); A tension spring (8) is wound and installed on the outer surface of the locking rod (7), with one end fixedly connected to the inner wall of the sliding opening (5) and the other end fixedly connected to the outer surface of the locking rod (7). A drive mechanism is provided on the cylindrical shell (1) and is used to drive the locking rod (7) to move.

3. The printing roller for gravure printing on GRC surface according to claim 2, characterized in that, The drive mechanism includes; There are two pairs of openings (9), both formed inside the outer wall of the cylindrical shell (1), and each connected to one of the two pairs of limiting shells (3); The drive plate (10) is slidably installed in the through-hole (9), with one end located in the cylindrical shell (1) and the other end extending into the limiting shell (3) and its outer surface contacting one end of the locking rod (7); A rubber airbag (11) is disposed inside the cylindrical shell (1); An arc-shaped plate (12) is fixedly installed on one end face of the drive plate (10) located inside the cylindrical shell (1), and its inner surface is bonded to the outer surface of the rubber airbag (11). A connecting tube (13) is installed through the outer wall of the cylindrical shell (1), and one end is fixedly connected to the rubber airbag (11); The valve (14) is fixedly installed on one end of the connecting pipe (13) located on the outside of the cylindrical shell (1).

4. A printing roller for gravure printing on GRC surfaces according to claim 3, characterized in that, A groove (15) is formed on the inner wall surface of the opening (9), and a slider (16) that is slidably connected to the groove (15) is fixedly installed on the outer surface of the drive plate (10).

5. A printing roller for gravure printing on GRC surfaces according to claim 3, characterized in that, The drive plate (10) is V-shaped at one end inside the limiting shell (3).

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