Packaging paper printing and drying device

Abstract

The utility model discloses a packaging paper printing and drying device, which relates to the field of packaging paper processing and comprises a rack, a chain-plank conveyor for conveying packaging paper is fixedly mounted on the upper surface of the rack, a drying box is fixedly mounted on the upper surface of the chain-plank conveyor, and an anti-deformation component is arranged in the drying box. Through the arrangement of the anti-deformation assembly, when the packaging paper is heated, a fiber structure begins to soften, at the moment, mechanical pressure applied by the heating roller can immediately restrain the free deformation trend caused by thermal expansion, the real-time pressing action enables the packaging paper to be forcibly kept flat, the forming conditions of hemming and warping are physically blocked, and the packaging paper is not prone to deformation. Meanwhile, when the heated packaging paper enters the cooling stage, the shape of the packaging paper is fixed under the action of the heating roller, the flat shape of the packaging paper is further consolidated in the cooling process of the cooling roller, and it is ensured that a final product is free of the undesirable phenomena such as edge curling and upwarping.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging paper processing, in particular to a packaging paper printing and drying device. Background Art

[0002] Drying the printed wrapping paper after printing is an essential step in the production of color box packaging. Early color box production relied primarily on natural air drying or simple hot air drying, which resulted in low production efficiency and was easily affected by ambient temperature and humidity, leading to unstable print quality. The development of the packaging industry has placed higher demands on printing precision, drying speed, and consistency for color boxes, prompting continuous improvements in drying technology. Modern packaging paper printing drying equipment utilizes technologies such as infrared and UV curing, or high-efficiency hot air circulation, enabling rapid ink drying, improving production efficiency, and ensuring the clarity and color stability of printed patterns.

[0003] After searching, the utility model patent with the authorization announcement number CN221954095U is a printing device for packaging paper boxes, including a base, a blower is fixedly installed on one side of the base, a dust box is fixedly installed inside the blower, the output end of the blower is fixedly connected to one end of the exhaust duct, the top surface of the base is provided with a slot, the slot is provided at four places and the slot is adapted to the plug, the plug is fixedly connected to the bottom end of the dust cover, the top of the dust cover is fixedly installed with a dryer, the top of the dust cover is also provided with a hole, and one end of the exhaust duct passes through the hole and is fixedly connected to the wind shield. By adding a blower to one side of the base and fitting the dust cover to the top of the base, when the packaging paper box is placed on the conveyor, the blower can absorb the dust on the surface of the packaging paper box through the exhaust duct and prevent additional dust from falling. After printing is completed, the ink can be quickly dried by the dryer installed on the top of the dust cover.

[0004] During the drying process, this device only relies on a flexible limit frame to fix the position of the paper box, but there is no mechanical pressure roller or adsorption device to suppress the thermal shrinkage stress of the paper box during drying. When the paper shrinks due to heat in a free state, it is easy to deform due to the release of fiber stress, resulting in curling and warping problems. In view of this, this application proposes a packaging paper printing and drying device based on the above technical problems. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a packaging paper printing and drying device.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A packaging paper printing and drying device comprises a frame, a chain plate conveyor for conveying packaging paper is fixedly mounted on the upper surface of the frame, a drying box is fixedly mounted on the upper surface of the chain plate conveyor, and an anti-deformation component is provided inside the drying box;

[0008] The anti-deformation assembly includes at least two groups of heating rollers and cooling rollers. The drying box is composed of a front section, a middle section, and a rear section. The heating rollers are located in the middle section, and the cooling rollers are located in the rear section.

[0009] A connecting plate is rotatably connected between the heating roller and the cooling roller, an adjusting component is provided between the connecting plate and the drying box, and an exhaust component is provided on one side of the drying box.

[0010] Furthermore, infrared heaters are fixedly installed on the left and right inner walls of the front section.

[0011] Furthermore, the temperature of the infrared heater is set to 60-80°C, the temperature of the heating roller is set to 80-100°C, and the temperature of the cooling roller is set to 20-30°C.

[0012] Furthermore, the adjustment component includes an electric telescopic rod fixedly mounted on the upper surface of the drying box, a lifting plate fixedly mounted on the output end of the electric telescopic rod, a T-shaped block fixedly mounted on the upper surface of the connecting plate, a slide groove matching the T-shaped block is provided on the lifting plate, and a spring is fixedly mounted between the top of the slide groove and the T-shaped block.

[0013] Furthermore, the exhaust assembly includes a blower, an exhaust pipe is fixedly installed at the air inlet of the blower, one end of the exhaust pipe leads to the interior of the drying box, a support shell is fixedly installed on one side of the drying box, and the blower is fixedly installed on the top of the support shell.

[0014] Furthermore, a mounting hole is provided on the upper surface of the drying box, a sealing cover is provided on the mounting hole, a connecting ring is fixedly installed on the inner side of the connection between the exhaust pipe and the drying box, an external thread is provided on the outside of the connecting ring, and the connecting ring is connected to a connecting tube through the external thread, and stainless steel wire mesh, glass fiber cotton, and honeycomb activated carbon are arranged in sequence from bottom to top in the connecting tube.

[0015] Furthermore, two symmetrical guide rods are fixedly mounted on the upper surface of the connecting plate, and one end of the guide rod passes through the drying box and is slidably connected thereto.

[0016] Furthermore, the surface of the heating roller is sprayed with a Teflon coating.

[0017] The beneficial effects of the utility model are:

[0018] 1. The utility model provides an anti-deformation component. When the wrapping paper is heated, the fiber structure begins to soften. At this time, the mechanical pressure applied by the heating roller can immediately suppress the free deformation tendency caused by thermal expansion. This real-time pressing effect forces the wrapping paper to remain flat during molding, physically blocking the conditions for the formation of curling and warping. At the same time, when the heated wrapping paper enters the cooling stage, its shape has been fixed under the action of the heating roller. The cooling process of the cooling roller further consolidates the flat shape of the wrapping paper, ensuring that the final product has no undesirable phenomena such as curling and warping.

[0019] 2. The utility model is provided with an adjustment component, an infrared heater, a heating roller and a cooling roller. The packaging paper is smoothly fed into the drying box by a chain conveyor and first passes through the infrared heater area in the front section. The infrared heaters installed on both sides preliminarily heat the packaging paper at a temperature of 60-80°C, so that the surface solvent of the ink evaporates slowly. This pre-drying process can avoid quality problems caused by sudden shrinkage of the ink during subsequent high-temperature treatment. The packaging paper then enters the main drying area in the middle section. The temperature of the heating roller is controlled between 80-100°C. The lifting plate is driven to move by an electric telescopic rod so that the heating roller and the cooling roller can contact the packaging paper. When the electric telescopic rod applies pressure, the floating structure of the T-block and the spring enables the heating roller and the cooling roller to automatically adapt to slight changes in the thickness of the packaging paper, while maintaining full contact while avoiding excessive pressure.

[0020] 3. The utility model is equipped with an exhaust component, stainless steel wire mesh, glass fiber cotton, and honeycomb activated carbon. The gases can be extracted from the drying box through the exhaust pipe on the blower, and are intercepted by the stainless steel wire mesh, glass fiber cotton, and honeycomb activated carbon in turn. The stainless steel wire mesh is used to intercept paper scraps and large particles of dust, the glass fiber cotton is used to capture PM2.5 and fine fibers, and the honeycomb activated carbon is used to absorb VOCs and odors. On the basis of ensuring a safe working environment, it can also prevent particulate matter, benzene, esters and other substances from entering the blower to prevent internal corrosion. After a period of use, open the sealing cover, take out the connecting tube, and replace the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a packaging paper printing and drying device proposed in the utility model;

[0022] Figure 2 This is a cross-sectional schematic diagram of a drying box of a packaging paper printing and drying device proposed in the present invention;

[0023] Figure 3 This is a front view schematic diagram of a packaging paper printing and drying device proposed by the utility model;

[0024] Figure 4This is a left side schematic diagram of a packaging paper printing and drying device proposed by the utility model;

[0025] Figure 5 A packaging paper printing and drying device proposed by the utility model Figure 2 A partial enlarged schematic diagram in the middle;

[0026] Figure 6 This is a cross-sectional schematic diagram of a lifting plate of a packaging paper printing and drying device proposed in the utility model;

[0027] Figure 7 This is an exploded schematic diagram of a connecting cylinder of a packaging paper printing and drying device proposed by the utility model.

[0028] In the figure: 1. Frame; 2. Chain conveyor; 3. Drying box; 4. Heating roller; 5. Cooling roller; 6. Front section; 7. Middle section; 8. Rear section; 9. Connecting plate; 10. Infrared heater; 11. Electric telescopic rod; 12. Lifting plate; 13. T-block; 14. Spring; 15. Blower; 16. Exhaust pipe; 17. Support shell; 18. Sealing cover; 19. Connecting ring; 20. External thread; 21. Connecting cylinder; 22. Stainless steel wire mesh; 23. Glass fiber cotton; 24. Honeycomb activated carbon; 25. Guide rod. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] Reference Figure 1-4 A packaging paper printing and drying device comprises a frame 1, a chain plate conveyor 2 for conveying packaging paper is fixedly mounted on the upper surface of the frame 1, a drying box 3 is fixedly mounted on the upper surface of the chain plate conveyor 2, and an anti-deformation component is provided inside the drying box 3;

[0031] The anti-deformation assembly includes at least two groups of heating rollers 4 and cooling rollers 5. The drying box 3 is composed of a front section 6, a middle section 7, and a rear section 8. The heating rollers 4 are located in the middle section 7, and the cooling rollers 5 are located in the rear section 8.

[0032] When the wrapping paper is heated, its fiber structure begins to soften. The mechanical pressure applied by the heating roller 4 can immediately suppress the tendency of free deformation caused by thermal expansion. This real-time pressing action forces the wrapping paper to remain flat during molding, physically blocking the conditions for curling and warping. At the same time, when the heated wrapping paper enters the cooling stage, its shape has been fixed by the action of the heating roller 4. The cooling process of the cooling roller 5 further consolidates the flat shape of the wrapping paper, ensuring that the final product has no curling, warping or other defects.

[0033] A connecting plate 9 is rotatably connected between the heating roller 4 and the cooling roller 5 . An adjusting component is provided between the connecting plate 9 and the drying box 3 . An exhaust component is provided on one side of the drying box 3 .

[0034] Reference Figure 2 、 Figure 4 Specifically, infrared heaters 10 are fixedly installed on the inner walls on both sides of the front section 6. The packaging paper is smoothly fed into the drying box 3 by the chain conveyor 2, and first passes through the infrared heater 10 area of ​​the front section 6 for pre-drying.

[0035] Reference Figure 2 Specifically, the temperature of the infrared heater 10 is set to 60-80°C, the temperature of the heating roller 4 is set to 80-100°C, and the temperature of the cooling roller 5 is set to 20-30°C;

[0036] The infrared heater 10 preliminarily heats the wrapping paper at a temperature of 60-80°C, causing the surface solvent of the ink to evaporate slowly. This pre-drying process can avoid quality problems caused by sudden shrinkage of the ink during subsequent high-temperature treatment. The wrapping paper then enters the main drying area of ​​the middle section 7, and the temperature of the heating roller 4 is controlled between 80-100°C. After the main drying is completed, the wrapping paper immediately enters the cooling and shaping area of ​​the rear section 8, and the cooling roller 5 is maintained at a low temperature of 20-30°C. The temperature of the wrapping paper is suddenly reduced through rapid heat exchange. This process can effectively lock the shape of the wrapping paper, eliminate internal residual stress, and avoid deformation problems during subsequent storage or processing.

[0037] Reference Figure 2 、 Figure 6 Specifically, the adjustment component includes an electric telescopic rod 11 fixedly mounted on the upper surface of the drying box 3, a lifting plate 12 fixedly mounted on the output end of the electric telescopic rod 11, a T-block 13 fixedly mounted on the upper surface of the connecting plate 9, a chute matching the T-block 13 is provided on the lifting plate 12, and a spring 14 is fixedly mounted between the top of the chute and the T-block 13;

[0038] The electric telescopic rod 11 drives the lifting plate 12 to move, so that the heating roller 4 and the cooling roller 5 can contact the packaging paper. When the electric telescopic rod 11 applies pressure, the floating structure of the T-block 13 and the spring 14 enables the heating roller 4 and the cooling roller 5 to automatically adapt to slight changes in the thickness of the packaging paper, maintaining full contact while avoiding excessive pressure.

[0039] Reference Figure 1-2Specifically: the exhaust assembly includes a blower 15, an exhaust pipe 16 is fixedly installed at the air inlet of the blower 15, one end of the exhaust pipe 16 leads to the interior of the drying box 3, a support shell 17 is fixedly installed on one side of the drying box 3, and the blower 15 is fixedly installed on the top of the support shell 17;

[0040] During the drying process of the printed packaging paper, water vapor and volatile solvents are generated, and these gases can be extracted from the drying box 3 through the exhaust pipe 16 on the blower 15.

[0041] Reference Figure 1-2 、 Figure 5 、 Figure 7 Specifically: the upper surface of the drying box 3 is provided with a mounting hole, and a sealing cover 18 is provided on the mounting hole. A connecting ring 19 is fixedly installed on the inner side of the connection between the exhaust pipe 16 and the drying box 3. The outer side of the connecting ring 19 is provided with an external thread 20. The connecting ring 19 is connected to a connecting tube 21 through the external thread 20. The connecting tube 21 is provided with a stainless steel wire mesh 22, glass fiber cotton 23, and honeycomb activated carbon 24 in sequence from bottom to top;

[0042] The gas extracted by the blower 15 is intercepted by the stainless steel wire mesh 22, glass fiber cotton 23, and honeycomb activated carbon 24 in sequence. The stainless steel wire mesh 22 is used to intercept paper scraps and large particles of dust, the glass fiber cotton 23 is used to capture PM2.5 and fine fibers, and the honeycomb activated carbon 24 is used to absorb VOCs and odors. On the basis of ensuring a safe working environment, it can also prevent particulate matter, benzene, esters and other substances from entering the blower 15 to prevent internal corrosion. After a period of use, open the sealing cover 18, take out the connecting tube 21, and replace the filter element.

[0043] Reference Figure 2 Specifically, two symmetrical guide rods 25 are fixedly mounted on the upper surface of the connecting plate 9 , and one end of the guide rod 25 passes through the drying box 3 and is slidably connected thereto.

[0044] Specifically: the surface of the heating roller 4 is sprayed with a Teflon coating. The low friction property of the Teflon coating allows the paper to pass through the heating roller 4 more smoothly, reducing the possibility of paper jams and improving the overall drying efficiency and printing quality.

[0045] Working Principle: When the wrapping paper is heated, its fiber structure begins to soften. At this time, the mechanical pressure applied by the heating roller 4 can immediately suppress the tendency of free deformation caused by thermal expansion. This real-time pressing action forces the wrapping paper to remain flat during molding, physically blocking the formation of curling and warping. At the same time, when the heated wrapping paper enters the cooling stage, its shape has been fixed by the action of the heating roller 4. The cooling process of the cooling roller 5 further consolidates the flat shape of the wrapping paper, ensuring that the final product has no curling, warping or other defects.

[0046] The wrapping paper is smoothly fed into the drying box 3 by the chain conveyor 2. It first passes through the infrared heater 10 area of ​​the front section 6. The infrared heaters 10 installed on both sides preliminarily heat the wrapping paper at a temperature of 60-80°C, causing the surface solvent of the ink to slowly evaporate. This pre-drying process can avoid quality problems caused by sudden shrinkage of the ink during subsequent high-temperature treatment.

[0047] The wrapping paper then enters the main drying area of ​​the middle section 7. The temperature of the heating roller 4 is controlled between 80-100°C. The electric telescopic rod 11 drives the lifting plate 12 to move, so that the heating roller 4 and the cooling roller 5 can contact the wrapping paper. When the electric telescopic rod 11 applies pressure, the floating structure of the T-block 13 and the spring 14 allows the heating roller 4 and the cooling roller 5 to automatically adapt to slight changes in the thickness of the wrapping paper, maintaining full contact while avoiding excessive pressure.

[0048] After the main drying is completed, the packaging paper immediately enters the cooling and shaping area of ​​the subsequent section 8. The cooling roller 5 is maintained at a low temperature of 20-30°C. The packaging paper temperature is suddenly reduced through rapid heat exchange. This process can effectively lock the shape of the packaging paper, eliminate internal residual stress, and avoid deformation during subsequent storage or processing.

[0049] During the drying process of printed packaging paper, water vapor and volatile solvents are generated. These gases are extracted from the drying box 3 through the exhaust pipe 16 on the blower 15 and intercepted by the stainless steel wire mesh 22, glass fiber cotton 23, and honeycomb activated carbon 24 in sequence. The stainless steel wire mesh 22 is used to intercept paper scraps and large particles of dust, the glass fiber cotton 23 is used to capture PM2.5 and fine fibers, and the honeycomb activated carbon 24 is used to absorb VOCs and odors. On the basis of ensuring a safe working environment, it can also prevent particulate matter, benzene, esters and other substances from entering the blower 15, preventing internal corrosion. After a period of use, open the sealing cover 18 and remove the connecting tube 21 to replace the filter element.

[0050] The entire workflow realizes continuous processing from pre-drying, main drying to cooling and shaping. The various functional modules operate in coordination to ensure the drying quality while effectively controlling the paper deformation problem.

[0051] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

[0052] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this patent.

Claims

1. A packaging paper printing and drying device, characterized in that: It comprises a frame (1), a chain plate conveyor (2) for conveying packaging paper is fixedly mounted on the upper surface of the frame (1), a drying box (3) is fixedly mounted on the upper surface of the chain plate conveyor (2), and an anti-deformation component is provided inside the drying box (3); The anti-deformation component includes at least two groups of heating rollers (4) and cooling rollers (5); the drying box (3) is composed of a front section (6), a middle section (7), and a rear section (8); the heating rollers (4) are located at the middle section (7), and the cooling rollers (5) are located at the rear section (8); A connecting plate (9) is rotatably connected between the heating roller (4) and the cooling roller (5), an adjustment component is provided between the connecting plate (9) and the drying box (3), and an exhaust component is provided on one side of the drying box (3).

2. A packaging paper printing and drying device according to claim 1, characterized in that: Infrared heaters (10) are fixedly mounted on the left and right inner walls of the front section (6).

3. A packaging paper printing and drying device according to claim 2, characterized in that: The temperature of the infrared heater (10) is set to 60-80°C, the temperature of the heating roller (4) is set to 80-100°C, and the temperature of the cooling roller (5) is set to 20-30°C.

4. The packaging paper printing and drying device according to claim 1, characterized in that: The adjustment assembly comprises an electric telescopic rod (11) fixedly mounted on the upper surface of the drying box (3); a lifting plate (12) is fixedly mounted on the output end of the electric telescopic rod (11); a T-shaped block (13) is fixedly mounted on the upper surface of the connecting plate (9); a sliding groove matching the T-shaped block (13) is provided on the lifting plate (12); and a spring (14) is fixedly mounted between the top end of the sliding groove and the T-shaped block (13).

5. The packaging paper printing and drying device according to claim 1, characterized in that: The exhaust assembly includes a blower (15), an exhaust pipe (16) is fixedly installed at the air inlet of the blower (15), one end of the exhaust pipe (16) leads to the interior of the drying box (3), a support shell (17) is fixedly installed on one side of the drying box (3), and the blower (15) is fixedly installed on the top of the support shell (17).

6. The packaging paper printing and drying device according to claim 5, characterized in that: The drying box (3) is provided with a mounting hole on its upper surface, and a sealing cover (18) is provided on the mounting hole. A connecting ring (19) is fixedly installed on the inner side of the connection between the exhaust pipe (16) and the drying box (3), and an external thread (20) is provided on the outside of the connecting ring (19). The connecting ring (19) is connected to a connecting tube (21) via the external thread (20), and a stainless steel wire mesh (22), glass fiber cotton (23), and honeycomb activated carbon (24) are provided in sequence from bottom to top in the connecting tube (21).

7. The packaging paper printing and drying device according to claim 1, characterized in that: Two symmetrical guide rods (25) are fixedly mounted on the upper surface of the connecting plate (9), and one end of the guide rod (25) passes through the drying box (3) and is slidably connected thereto.

8. The packaging paper printing and drying device according to claim 1, characterized in that: The surface of the heating roller (4) is sprayed with a Teflon coating.

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