Pressing device for carton printing

Abstract

The utility model discloses a pressing device for carton printing, which comprises a paperboard rolling mechanism, and a harmful gas purification mechanism is arranged on the surface of the top of the paperboard rolling mechanism. The harmful gas purification mechanism comprises a gas collecting hood, a plurality of servo fans fixed on the bottom end face of the gas collecting hood and a palladium frame fixed in the middle of an inner cavity of the gas collecting hood, a honeycomb-shaped activated carbon plate is embedded and fixed in a top port of the gas collecting hood, and a plurality of electric heating rods are fixed in an upper area in the inner cavity of the gas collecting hood. By means of a closed-loop control system formed by the servo electric cylinder and the pressure sensor, dynamic adjustment of the gap between the pressing rollers is achieved, the pressing requirements of paperboards with different thicknesses can be met, the equipment universality and the pressing quality stability are improved, and the rejection rate caused by thickness fluctuation is reduced. And a three-stage purification system integrating palladium catalyst low-temperature oxidation, electric heating auxiliary pyrolysis and activated carbon deep adsorption is adopted, so that the emission concentration is ensured to be less than or equal to 2ppm, and the problem of volatile organic compound pollution in the printing industry is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of cardboard pressing equipment technology, specifically to a pressing device for carton printing. Background Technology

[0002] In the corrugated box printing industry, cardboard lamination and shaping is a crucial step in ensuring printing quality. However, the printing process generates volatile organic compounds (VOCs), which can cause environmental pollution. To address this issue, existing cardboard lamination equipment is equipped with a purification system. However, traditional purification systems are often designed independently from the lamination mechanism, which not only occupy a large space and have low gas collection efficiency, but also require the core components of the purification system, such as the catalyst layer and heating elements, to be welded and fixed, necessitating machine shutdown and disassembly for replacement and maintenance, thus affecting production efficiency. Furthermore, existing purification systems often rely on a single treatment method (such as activated carbon adsorption or ultraviolet photolysis), which has a removal rate of less than 70% for complex VOCs (such as benzene compounds and esters), making it difficult to meet the ≤10ppm limit requirement in the "Standard for the Control of Unorganized Emissions of Volatile Organic Compounds". Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a pressing device for printing cartons, thereby solving the problems mentioned in the background art.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A pressing device for printing cartons includes a cardboard roller pressing mechanism. The top surface of the cardboard roller pressing mechanism is provided with a harmful gas purification mechanism. The cardboard roller pressing mechanism includes a base, two support seats fixedly connected to the upper surface of the base, and a rectangular bracket fixed to the left side of the upper surface of the base. A servo electric cylinder is embedded and fixed inside each support seat. The bottom end of the telescopic shaft of the servo electric cylinder is rotatably connected to an upper pressure roller that passes through the support seat through a bearing, and the left end of the upper pressure roller passes through the interior of the rectangular bracket.

[0006] A drive motor is installed on the left side of the top surface of the base. Two driven gears are rotatably connected to the left side wall of the left support seat. A lower pressure roller that passes through the left support seat is fixed to the right end face of the driven gear. A transmission gear located below the driven gear is rotatably connected to the left side wall of the left support seat. A drive gear that meshes with the transmission gear is fixed on the output shaft of the drive motor. The transmission gear also meshes with the driven gear.

[0007] The harmful gas purification mechanism includes a gas collection hood, several servo fans fixed on the bottom end face of the gas collection hood, and a palladium frame fixed in the middle of the inner cavity of the gas collection hood. A honeycomb activated carbon plate is embedded and fixed at the top port of the gas collection hood, and several electric heating rods are fixed in the upper part of the inner cavity of the gas collection hood.

[0008] As a preferred embodiment of the pressing device for carton printing, the bottom end face of the gas collecting hood is provided with an opening for the servo fan to be embedded and fixed, and the top end face of the gas collecting hood is provided with an opening for the honeycomb activated carbon plate to be embedded and fixed.

[0009] As a preferred embodiment of the pressing device for carton printing, the left and right side walls of the gas collecting hood are fixedly connected to the side wall of the support base that is close to each other, and the bottom end face of the gas collecting hood has a distance of 5-15cm from the top surface of the upper pressure roller.

[0010] As a preferred embodiment of the pressing device for carton printing, the palladium frame is hollow inside, and the bottom and top surfaces of the palladium frame are provided with several through holes for gas to pass through.

[0011] As a preferred embodiment of the pressing device for carton printing, the heating end of the electric heating rod has a distance of 2-3 cm between it and the top surface of the servo fan, and a temperature sensor and controller are installed in the inner cavity of the air collection hood to control the temperature of the electric heating rod to be maintained at 300-400℃.

[0012] As a preferred embodiment of the pressing device for carton printing, the right end of the lower pressure roller is rotatably connected to the left side wall of the right support seat via a bearing.

[0013] As a preferred embodiment of the pressing device for carton printing, the top surface of the lower pressure roller and the bottom surface of the upper pressure roller have a gap for the cardboard to pass through.

[0014] As a preferred embodiment of the pressing device for carton printing, the rectangular bracket and the support base are provided with strip-shaped through holes for the upper pressure roller to move up and down.

[0015] The beneficial effects of this utility model are:

[0016] This invention utilizes a closed-loop control system comprised of a servo electric cylinder and a pressure sensor to dynamically adjust the gap between the pressure rollers. This adapts to the pressing requirements of paperboards of varying thicknesses, enhancing the equipment's versatility and the stability of pressing quality, while reducing scrap rates caused by thickness fluctuations. Furthermore, it integrates a three-stage purification system: low-temperature oxidation with palladium catalyst, electrically assisted pyrolysis, and deep adsorption with activated carbon, ensuring an emission concentration ≤2ppm, effectively addressing the volatile organic compound (VOC) pollution problem in the printing industry. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly described below. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the pressing device for printing cartons according to this utility model.

[0019] Figure 2 This is a schematic diagram of the paperboard roller pressing mechanism described in this utility model.

[0020] Figure 3 This is a schematic diagram of the harmful gas purification mechanism described in this utility model.

[0021] In the picture:

[0022] 1. Cardboard roller pressing mechanism; 11. Base; 12. Transmission gear; 13. Rectangular bracket; 14. Drive motor; 15. Servo electric cylinder; 16. Upper pressure roller; 17. Support seat; 18. Lower pressure roller; 19. Driven gear; 110. Drive gear; 2. Harmful gas purification mechanism; 21. Gas collection hood; 22. Servo fan; 23. Palladium frame; 24. Electric heating rod; 25. Honeycomb activated carbon plate. Detailed Implementation

[0023] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0024] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0025] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0026] In the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating the connection relationship between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] like Figures 1 to 3 As shown, this utility model provides a pressing device for printing cartons, including a cardboard roller pressing mechanism 1 and a harmful gas purification mechanism 2. The device presses and shapes the printed carton cardboard through the cardboard roller pressing mechanism 1, and integrates a harmful gas purification function to realize real-time treatment of volatile organic compounds (VOCs) generated during the printing process.

[0028] In the cardboard roll pressing mechanism 1, the base 11 is an integrally welded rectangular steel frame, and two parallel support seats 17 are fixed to the upper surface by bolts. The distance between the two support seats 17 is preferably 800mm to ensure structural stability. The rectangular bracket 13 is vertically fixed to the left side of the base 11, and a strip-shaped through hole is opened inside for guiding the movement of the upper pressure roller 16. The upper pressure roller 16 is a chrome-plated steel roller, which passes through the support seat 17 laterally through the bearing. The telescopic shafts of the servo electric cylinder 15 are embedded at both ends of the upper pressure roller 16 to realize closed-loop control of the pressure roller gap.

[0029] The lower pressure roller 18 is a rubber-coated roller. Its right end is connected to the right support seat 17 via a shaft seat, and its left end passes through the left support seat 17 and is connected to the driven gear 19. The lower pressure roller 18 is driven by a drive motor 14. The output shaft of the drive motor 14 is connected to the drive gear 110 via a reducer. After the drive gear 110 meshes with the transmission gear 12, it transmits torque to the lower pressure roller 18 through the driven gear 19, forming a two-stage reduction transmission. In the initial state, the surface distance between the upper pressure roller 16 and the lower pressure roller 18 is 3mm, which can be adjusted to 0.5-5mm by the servo cylinder 15 to adapt to the pressing requirements of paperboards of different thicknesses.

[0030] In the hazardous gas purification unit 2, the gas collection hood 21 is welded from 304 stainless steel and has an inverted trapezoidal structure. Its left and right sides are fixed to the side walls of the support base 17 by bolts. Seven circular air inlets with a diameter of 150mm are opened at its bottom, corresponding to the installation of servo fans 22, forming a negative pressure zone covering the pressure roller operating area. A palladium frame 23 is fixed in the middle of the gas collection hood 21. The palladium frame 23 is made of porous ceramic substrate with a palladium loading of 0.5wt%. The internal honeycomb channels are coated with a precious metal catalyst, where VOCs undergo a low-temperature oxidation reaction (T≈200℃). Twelve electric heating rods 24 are arranged above the palladium frame 23, maintaining a 20mm distance from the fan outlet. A PID controller maintains the area temperature at 350±20℃. A honeycomb activated carbon plate 25 with an iodine value ≥800mg / g and a thickness of 50mm is embedded at the top, capable of adsorbing benzene compounds and residual ozone. The gas collection hood 21 integrates a temperature sensor and a VOCs detector. When the detected concentration is >50ppm, the controller automatically increases the speed of the servo fan 22 and starts the electric heating rod 24. The system is equipped with an emergency stop button to cut off the power in case of overheating >420℃ or malfunction.

[0031] Working principle and usage process of this utility model:

[0032] When this cardboard printing pressing device is in use, the printed cardboard is fed into the gap between the pressure rollers by a conveyor belt. The drive motor 14 drives the lower pressure roller 18 to rotate, while the upper pressure roller 16 rotates passively due to the friction of the cardboard. The servo electric cylinder 15 adjusts the gap between the pressure rollers in real time according to the thickness of the cardboard, keeping the pressing force stable at 200-500N. After the servo fan 22 is started, the VOCs gas generated in the pressure roller area is drawn into the gas collection hood 21, and then passes through the palladium frame 23 in sequence. The VOCs are decomposed into carbon dioxide and water, and the unreacted gas is further pyrolyzed by the electric heating rod 24. Finally, the honeycomb activated carbon plate 25 adsorbs the residual pollutants, and the clean gas is discharged from the top outlet.

[0033] It should be stated that the above-described specific embodiments are merely preferred embodiments of this utility model and the technical principles employed. Those skilled in the art should understand that various modifications, equivalent substitutions, and variations can be made to this utility model. However, such variations, as long as they do not depart from the spirit of this utility model, should be within the protection scope of this utility model. Furthermore, some terminology used in this application specification and claims is not limiting, but merely for ease of description.

Claims

1. A pressing device for printing cartons, characterized in that, It includes a paperboard rolling mechanism (1), and the top surface of the paperboard rolling mechanism (1) is provided with a harmful gas purification mechanism (2); The cardboard roller pressing mechanism (1) includes a base (11), two support seats (17) fixedly connected to the upper surface of the base (11), and a rectangular bracket (13) fixed to the left side of the upper surface of the base (11). A servo electric cylinder (15) is embedded and fixed inside each support seat (17). The bottom end of the telescopic shaft of the servo electric cylinder (15) is rotatably provided with an upper pressure roller (16) that passes through the support seat (17) through a bearing, and the left end of the upper pressure roller (16) passes through the rectangular bracket (13). A drive motor (14) is installed on the left side of the top surface of the base (11). Two driven gears (19) are rotatably connected to the left side wall of the left support (17). A lower pressure roller (18) that passes through the left support (17) is fixed to the right end face of the driven gear (19). A transmission gear (12) located below the driven gear (19) is rotatably connected to the left side wall of the left support (17). A drive gear (110) that meshes with the transmission gear (12) is fixed on the output shaft of the drive motor (14). The transmission gear (12) also meshes with the driven gear (19). The harmful gas purification mechanism (2) includes a gas collection hood (21), several servo fans (22) fixed on the bottom end face of the gas collection hood (21), and a palladium frame (23) fixed in the middle of the inner cavity of the gas collection hood (21). A honeycomb activated carbon plate (25) is embedded and fixed at the top port of the gas collection hood (21), and several electric heating rods (24) are fixed in the upper part of the inner cavity of the gas collection hood (21).

2. The pressing device for carton printing according to claim 1, characterized in that, The bottom end face of the gas collection hood (21) is provided with an opening for the servo fan (22) to be embedded and fixed, and the top end face of the gas collection hood (21) is provided with an opening for the honeycomb activated carbon plate (25) to be embedded and fixed.

3. The pressing device for printing cartons according to claim 1, characterized in that, The left and right sidewalls of the gas collection hood (21) are fixedly connected to the sidewall of the support base (17) that is close to each other, and the bottom end face of the gas collection hood (21) has a distance of 5-15cm from the top surface of the upper pressure roller (16).

4. The pressing device for printing cartons according to claim 1, characterized in that, The palladium frame (23) is hollow inside, and the bottom and top surfaces of the palladium frame (23) are provided with several through holes for gas to pass through.

5. The pressing device for printing cartons according to claim 1, characterized in that, The heating end of the electric heating rod (24) has a distance of 2-3 cm between it and the top surface of the servo fan (22), and a temperature sensor and controller are installed in the inner cavity of the gas collection hood (21) to control the temperature of the electric heating rod (24) to be maintained at 300-400℃.

6. The pressing device for printing cartons according to claim 1, characterized in that, The right end of the lower pressure roller (18) is rotatably connected to the left side wall of the right support seat (17) via a bearing.

7. The pressing device for printing cartons according to claim 1, characterized in that, The top surface of the lower pressure roller (18) and the bottom surface of the upper pressure roller (16) have a gap for the paperboard to pass through.

8. The pressing device for printing cartons according to claim 1, characterized in that, The rectangular bracket (13) and the support base (17) have strip-shaped through holes inside for the upper pressure roller (16) to move up and down.

Images