Pre-coating film laminating equipment for packaging and printing

Abstract

The invention relates to the technical field of package printing, in particular to pre-coating film laminating equipment for package printing, which comprises a base, an outer bottom shell is arranged on the lower surface of the base, and a conveying device is arranged on the upper surface of the outer bottom shell. Through the arrangement of the inner hollow shell, the spring, the connecting block, the oblique angle porcelain block, the thermal radiation lamp, a hollow groove, a graphite plate, a heat conduction plate, a heat conduction wheel and the like, when the heat conduction wheel makes contact with a film-coated material, the connecting block is extruded due to the thickness of the material, at the moment, the spring rebounds, a downward pressing force is formed, the heat conduction wheel of the device better conducts material attaching, and the material attaching efficiency is improved. At the moment, the oblique angle porcelain block is heated through the thermal radiation lamp, and then a composite efficient heat conduction buffer layer is formed through the hollow-out groove, the internal heat conduction plate and the graphite plate, so that a more uniform, quicker and more stable heating effect can be achieved, film covering bubbles and warped edges are remarkably reduced, and a secondary film covering effect is achieved.

Description

Technical Field

[0001] This invention relates to the field of packaging and printing technology, and in particular to a pre-coated film laminating device for packaging and printing. Background Technology

[0002] In the packaging and printing industry, to improve the surface gloss, abrasion resistance, water resistance, and aesthetics of printed materials, lamination is often required for paper, cardboard, and other printed materials. Pre-coated film lamination is one of the most widely used lamination methods. Its principle is to apply a pre-coated plastic film (such as BOPP film) with a hot melt adhesive layer to the surface of the printed material through heating and pressure, forming a protective film.

[0003] With the rapid development of the packaging industry, the requirements for lamination quality are becoming increasingly stringent, especially in high-end packaging, food packaging, and gift boxes. These applications demand not only a smooth, bubble-free, and wrinkle-free lamination surface, but also a firm bond, non-curling edges, and good folding resistance. However, existing pre-coated film lamination equipment still faces numerous technical challenges in practical use, affecting lamination quality and production efficiency. Therefore, a pre-coated film lamination device for packaging and printing is needed.

[0004] In existing technologies, the most common quality problems with general laminating machines are when they are first started up and lamination begins. This is because the equipment is in an unstable stage of temperature rise, tension establishment, and speed acceleration. Furthermore, air bubbles may form on the surface of the material during lamination. These air bubbles can cause unevenness, white spots, and hazy areas on the laminated surface, severely affecting the appearance of the printed materials. The adhesive layer in the air bubble area does not make sufficient contact with the paper, which can easily lead to delamination and edge curling later on. Air bubbles usually require the entire section to be cut off, resulting in a double waste of film and material. Summary of the Invention

[0005] The purpose of this invention is to provide a pre-coated film laminating device for packaging printing, in order to solve the problem mentioned in the background art. In the current prior art, the laminating machine is most prone to quality problems when it is first started up. This is because the equipment is in an unstable stage of temperature rise, tension establishment, and speed acceleration. Furthermore, air bubbles may be generated on the surface of the material during lamination. Air bubbles will cause unevenness, white spots, and hazy areas on the laminated surface, which will seriously affect the appearance of the printed matter. The adhesive layer in the air bubble area does not make sufficient contact with the paper, which can easily lead to delamination and edge curling later. Air bubbles usually need to be cut off in whole, resulting in a double waste of film and material.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a pre-coated film laminating device for packaging printing, comprising a base, an outer bottom shell disposed on the lower surface of the base, a conveying device disposed on the upper surface of the outer bottom shell, and further comprising:

[0007] The second roller shaft is provided on the inner surface of the base, and the first roller shaft and the second roller shaft are provided on the inner surface of the base. The first roller shaft and the second roller shaft work together.

[0008] Connecting rollers, a side fixing platform is fixedly connected to one side surface of the base, a track is provided inside the side fixing platform, and an outer shell is provided on the outer surface of the side fixing platform.

[0009] Preferably, the inner surface of the base is provided with a film-coating shaft, and the inner surface of the base is provided with a support shaft.

[0010] Preferably, the outer shell is provided with two sets of symmetrically distributed on the side fixing platform, and the connecting rollers are provided with several sets on the outer shell.

[0011] Preferably, the connecting roller has a rolling shaft inside, and both sides of the rolling shaft are rotatably connected to the connecting roller.

[0012] Preferably, the outer side of the rolling shaft is provided with an inner shell, the rolling shaft and the inner shell are rotatably connected, and the interior of the inner shell is divided into multiple chambers.

[0013] Preferably, a spring is fixedly connected inside the inner shell, and a connecting block is fixedly connected to the other end of the spring.

[0014] Preferably, the connecting block and the inner shell are slidably connected, an angled ceramic block is fixedly connected to the outer surface of the connecting block, and a thermal radiation lamp is fixedly connected to the inside of the connecting block. When the thermal radiation lamp is turned on, it shines directly on the outer surface of the angled ceramic block.

[0015] Preferably, a heat-conducting wheel is rotatably connected inside the angled ceramic block, and a hollow groove is formed inside the angled ceramic block.

[0016] Preferably, the hollow groove is L-shaped, and a graphite plate is disposed inside the hollow groove.

[0017] Preferably, the graphite plate has multiple sets of heat-conducting plates inside, and the outer surface of the heat-conducting plates and the inner surface of the hollow groove are in contact with each other.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. This application uses a base, outer shell, conveying device, coating shaft, support shaft, first roller shaft, second roller shaft, side fixing platform and track, etc. to install the film body on the coating shaft in the base, then stretch the film body to pass through the support shaft, and then through the support shaft and the first roller shaft to fix the film body between the first roller shaft and the second roller shaft. After the film body is fixed, the material to be coated is placed on the upper surface of the conveying device on the outer shell. At this time, the conveying device is started, and the conveying device will drive the material forward to pass between the first roller shaft and the second roller shaft. When the material passes between the first roller shaft and the second roller shaft, the first coating will be performed, thereby achieving the coating of the material.

[0020] 2. This application utilizes an inner shell, springs, connecting blocks, angled ceramic blocks, thermal radiation lamps, hollow grooves, graphite plates, heat-conducting plates, and heat-conducting wheels. When the heat-conducting wheels contact the coated material, the thickness of the material compresses the connecting blocks. At this time, the springs rebound, creating a downward force that allows the heat-conducting wheels to better adhere to the material. The angled ceramic blocks are then heated by the thermal radiation lamps, and a composite high-efficiency thermal buffer layer is formed by the hollow grooves and the internal heat-conducting plates and graphite plates. This achieves a more uniform, faster, and more stable heating effect, significantly reducing coating bubbles and edge curling, and realizing the effect of secondary coating. Attached Figure Description

[0021] Figure 1 This is a side view of a pre-coated film laminating device for packaging printing proposed in this invention.

[0022] Figure 2 This is a schematic diagram of the cooperation structure between the coating shaft and the first roller shaft of a pre-coated film coating device for packaging printing proposed in this invention;

[0023] Figure 3 This is a schematic diagram of the interaction between the track and the outer shell of a pre-coated film laminating device for packaging printing proposed in this invention;

[0024] Figure 4 This is a schematic diagram of the interlocking structure of the connecting block and the beveled ceramic block in a pre-coated film laminating device for packaging printing proposed in this invention.

[0025] Figure 5 This is a schematic diagram of the interlocking structure of the connecting block and spring in a pre-coated film laminating device for packaging printing proposed in this invention;

[0026] Figure 6 This is a schematic diagram of the interaction between the connecting block and the thermal radiation lamp in a pre-coated film laminating device for packaging printing proposed in this invention.

[0027] Figure 7This is a schematic diagram of the interlocking structure of the angled ceramic block and the hollowed-out groove in a pre-coated film laminating device for packaging printing proposed in this invention.

[0028] Figure 8 for Figure 7 Enlarged structural diagram at point A in the middle.

[0029] In the diagram: 1. Base; 2. Outer shell; 3. Conveying device; 4. Coating shaft; 5. Support shaft; 6. First roller shaft; 7. Second roller shaft; 8. Side fixing platform; 9. Track; 10. Outer shell; 11. Connecting roller; 12. Rolling shaft; 13. Inner shell; 14. Spring; 15. Connecting block; 16. Angled ceramic block; 17. Heat radiation lamp; 18. Hollowed-out groove; 19. Graphite plate; 20. Heat-conducting plate; 21. Heat-conducting wheel. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figures 1 to 8 This invention provides a technical solution: It includes a base 1, an outer shell 2 on the lower surface of the base 1, a conveying device 3 on the upper surface of the outer shell 2, a first roller 6 on the inner surface of the base 1, and a second roller 7 on the inner surface of the base 1. The first roller 6 and the second roller 7 work together. Through the design of the conveying device 3, materials can be conveyed to the coating area for coating. Through the cooperation of the first roller 6 and the second roller 7, the materials are clamped, and coating is performed simultaneously, so that the upper surface of the materials is coated. A side fixing platform 8 is fixedly connected to one side surface of the base 1. A conveyor belt 9 is provided inside the side fixing platform 8, and an outer shell 10 is provided on the outer surface of the side fixing platform 8. Through the arrangement of the base 1 and the side fixing platform 8, the device can perform subsequent secondary processing. Through the conveyor belt 9, the coated materials are conveyed forward.

[0032] The inner surface of the base 1 is provided with a film-coating shaft 4 and a support shaft 5. The outer shell 10 has two sets of symmetrically distributed rollers on the side fixing platform 8. Several sets of connecting rollers 11 are provided on the outer shell 10. The initial position of the film is fixed by the film-coating shaft 4. Then, the film is opened by the support shaft 5 to apply tension, thereby reducing wrinkles and other problems during film coating.

[0033] The connecting roller 11 has a rolling shaft 12 inside. Both sides of the rolling shaft 12 are rotatably connected to the connecting roller 11. Through the connection roller 11 and the rolling shaft 12, the rolling shaft 12 can move on the outer shell 10. When secondary processing is required, the rolling shaft 12 can be moved and adjusted to a suitable position according to the processing position.

[0034] The inner shell 13 is provided outside the rolling shaft 12. The rolling shaft 12 and the inner shell 13 are rotatably connected. The inner shell 13 is divided into multiple chambers. When the rolling shaft 12 moves, the position of the inner shell 13 remains unchanged. The purpose of the chambers in the inner shell 13 is to reduce the weight of the overall device and make it more flexible during secondary processing.

[0035] A spring 14 is fixedly connected inside the inner shell 13, and a connecting block 15 is fixedly connected to the other end of the spring 14. The connecting block 15 and the inner shell 13 are slidably connected. An angled ceramic block 16 is fixedly connected to the outer surface of the connecting block 15, and a heat radiation lamp 17 is fixedly connected inside the connecting block 15. When the heat radiation lamp 17 is turned on, it shines directly on the outer surface of the angled ceramic block 16. Due to the setting of the spring 14, the connecting block 15 can rebound to a certain extent, allowing the connecting block 15 to move within the inner shell 13. Due to the setting of the angled ceramic block 16, the ceramic has a high thermal conductivity and can conduct heat quickly. After being heated by the heat radiation lamp 17, the temperature can rise quickly.

[0036] The beveled ceramic block 16 is internally connected to a heat-conducting wheel 21. The beveled ceramic block 16 has an L-shaped hollow groove 18 inside. A graphite plate 19 is installed inside the hollow groove 18. The heat-conducting wheel 21 enables secondary coating, resulting in a better coating effect and eliminating the problems that occur during primary coating. The hollow groove 18 allows the graphite plate 19 to be installed inside the beveled ceramic block 16.

[0037] The graphite plate 19 has multiple sets of heat-conducting plates 20 inside. The outer surface of the heat-conducting plate 20 and the inner surface of the hollow groove 18 are in contact with each other. Through the arrangement of the graphite plate 19 and the heat-conducting plates 20, the heating of the ceramic is conducted to the heat-conducting plates 20. Then, the heat-conducting plates 20 dissipate heat from the side, transferring the heat to the heat-conducting wheel 21. This ensures that the temperature on the heat-conducting wheel 21 does not become too high while providing a stable heat source supply.

[0038] Working Principle: In existing technologies, the most common quality problems with general laminating machines are during the initial startup of the lamination process. This is because the equipment is in an unstable stage of temperature rise, tension establishment, and speed acceleration. Furthermore, air bubbles may form on the surface of the material during lamination. These air bubbles can cause unevenness, white spots, and hazy areas on the laminated surface, severely affecting the appearance of the printed materials. The adhesive layer in the air bubble area does not make sufficient contact with the paper, which can easily lead to delamination and edge curling later on. Air bubbles usually require the entire section to be cut off, resulting in a double waste of film and material. This device addresses these problems.

[0039] First, the membrane is installed on the coating shaft 4 in the base 1. Then, the membrane is stretched so that it passes through the support shaft 5 and then through the first roller shaft 6, so that the membrane is stuck between the first roller shaft 6 and the second roller shaft 7, thus fixing the membrane. After the membrane is fixed, the material to be coated is placed on the upper surface of the conveying device 3 on the outer bottom shell 2.

[0040] At this time, the conveying device 3 is started, and the conveying device 3 will drive the material forward, so that the material passes between the first roller 6 and the second roller 7. When it passes between the first roller 6 and the second roller 7, the first coating will be carried out. The first roller 6 will be heated. Through extrusion and heating, the film will be attached to the outer surface of the material. The overall tension is increased by the setting of the support shaft 5. At this time, the first coating is completed.

[0041] When the device is first started, air bubbles or curling edges may occur during the first coating process. When the material passes through the first roller 6, it will contact the conveyor belt 9 on the side fixed platform 8. The conveyor belt 9 will drive the material forward. At this time, the rolling shaft 12 set in the outer shell 10 moves slowly from left to right, driven by the connecting roller 11 in the outer shell 10. The rolling shaft 12 drives the inner shell 13 to move. According to the device settings, when the conveyor belt 9 carries the coated material forward, it will contact the heat-conducting wheel 21. The heat-conducting wheel 21 is mounted on the angled ceramic block 16. The angled ceramic block 16 and the connecting block 15 are fixedly connected. The connecting block 15 is installed in the inner shell 13. When the heat-conducting wheel 21 contacts the material, it will be squeezed. At this time, the connecting block 15 will contract at an angle, causing the spring 14 set above the connecting block 15 to contract according to the thickness of the material. At the same time, a downward squeezing force is applied, so that the heat-conducting wheel 21 is tightly attached to the outer surface of the material film.

[0042] At this time, the device is started, and the heat radiation lamp 17 installed at the bottom of the connecting block 15 is activated to start heating. Because the angled ceramic block 16 and the connecting block 15 are fixedly connected, the angled ceramic block 16 will heat up rapidly and conduct heat quickly. A hollow groove 18 is opened inside the angled ceramic block 16. Its function is to set a hollow heat dissipation groove inside the angled ceramic block 16, which reduces the heat capacity, improves the thermal response speed, and effectively releases the thermal expansion stress, thereby realizing the rapid establishment and stable control of the coating temperature. A graphite plate 19 and a heat-conducting plate 20 are set in the hollow groove 18 to form a composite high-efficiency heat-conducting buffer layer.

[0043] Because ceramics have uneven surface temperatures, graphite, with its extremely high isotropic thermal conductivity, can instantly diffuse heat from high-temperature points to low-temperature areas, making the temperature of the entire heating surface more uniform. Simultaneously, the heat-conducting plate 20 is typically manufactured with high precision, maximizing the heat absorption effect of the heat-conducting wheel 21. Compared to the point contact of ceramics, the thermal resistance is significantly reduced. This design allows for better flowability of the fully melted adhesive layer, enabling it to quickly fill the micropores on the paper surface under the action of the pressure roller, squeezing out air. Uniform heating ensures consistent shrinkage rates of the film in the width direction, preventing curling or edge warping caused by uneven shrinkage. Compared to directly using a heating roller, which can lead to excessively rapid heating and prevent secondary processing, this structure, through a composite heating structure, achieves a more uniform, faster, and more stable heating effect, significantly reducing lamination bubbles and edge warping. Furthermore, a heating rod is also installed below the conveyor belt 9, preventing the temperature of the conveyor belt 9 from becoming too low and causing excessive temperature differences that could affect lamination, thus improving lamination quality and production efficiency.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pre-coated film laminating device for packaging printing, comprising a base (1), characterized in that, The lower surface of the base (1) is provided with an outer bottom shell (2), and the upper surface of the outer bottom shell (2) is provided with a conveying device (3), and also includes: The second roller (7) is provided on the inner surface of the base (1), the first roller (6) is provided on the inner surface of the base (1), and the first roller (6) and the second roller (7) work together. Connecting roller (11), a side fixing platform (8) is fixedly connected to one side surface of the base (1), a track (9) is provided inside the side fixing platform (8), and an outer shell (10) is provided on the outer surface of the side fixing platform (8).

2. The pre-coated film laminating equipment for packaging printing according to claim 1, characterized in that: The inner surface of the base (1) is provided with a film-coated shaft (4) and the inner surface of the base (1) is provided with a support shaft (5).

3. The pre-coated film laminating equipment for packaging printing according to claim 1, characterized in that: The outer shell (10) has two sets of symmetrically distributed on the side fixing platform (8), and the connecting rollers (11) have several sets on the outer shell (10).

4. The pre-coated film laminating equipment for packaging printing according to claim 1, characterized in that: The connecting roller (11) has a rolling shaft (12) inside, and both sides of the rolling shaft (12) are rotatably connected to the connecting roller (11).

5. A pre-coated film laminating device for packaging printing according to claim 4, characterized in that: The outer side of the rolling shaft (12) is provided with an inner shell (13), the rolling shaft (12) and the inner shell (13) are rotatably connected, and the interior of the inner shell (13) is divided into multiple chambers.

6. The pre-coated film laminating equipment for packaging printing according to claim 5, characterized in that: A spring (14) is fixedly connected inside the inner shell (13), and a connecting block (15) is fixedly connected to the other end of the spring (14).

7. The pre-coated film laminating equipment for packaging printing according to claim 6, characterized in that: The connecting block (15) and the inner shell (13) are slidably connected. An angled ceramic block (16) is fixedly connected to the outer surface of the connecting block (15). A thermal radiation lamp (17) is fixedly connected inside the connecting block (15). When the thermal radiation lamp (17) is turned on, it shines directly on the outer surface of the angled ceramic block (16).

8. The pre-coated film laminating equipment for packaging printing according to claim 7, characterized in that: The beveled ceramic block (16) is internally connected to a heat-conducting wheel (21), and the beveled ceramic block (16) is internally provided with a hollow groove (18).

9. A pre-coated film laminating device for packaging printing according to claim 8, characterized in that: The hollow groove (18) is L-shaped, and a graphite plate (19) is provided inside the hollow groove (18).

10. A pre-coated film laminating device for packaging printing according to claim 9, characterized in that: The graphite plate (19) is provided with multiple sets of heat-conducting plates (20) inside, and the outer surface of the heat-conducting plate (20) and the inner surface of the hollow groove (18) are in contact with each other.

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