Environment-friendly paperboard ink printing process and printing equipment thereof

Abstract

The invention discloses an environment-friendly paperboard ink printing process and printing equipment thereof, and relates to the technical field of printing equipment, the environment-friendly paperboard ink printing process comprises the following steps: S1, pretreatment; s2, adjusting parameters; s3, rapid printing; s4, infrared drying and quality detection; and S5, post-processing. According to the method, quality detection of the test printing sample can be achieved through appearance, performance and size detection and quality evaluation, quality detection is also conducted on the paperboard after continuous printing is finished, the finished product rate of paperboard printing can be increased through double quality detection, infrared drying treatment is utilized after printing, generation of harmful gas during drying can be reduced, and the printing quality of the paperboard is improved. The workload of purification equipment is reduced, the drying speed is high, the drying efficiency can be improved, energy consumption is reduced, the environmental protection effect of the equipment in use is further improved, the temperature in the drying box is detected through the first temperature sensor during drying, and therefore the drying temperature is adjusted, and the drying temperature in the drying box can be conveniently maintained to be basically stable.

Description

Technical Field

[0001] The invention relates to the technical field of printing equipment, in particular to an environmentally friendly cardboard ink printing process and printing equipment thereof. Background Art

[0002] Printing is a technology that transfers the ink of text, pictures, photos, anti-counterfeiting manuscripts to the surface of paper, textiles, plastics, leather, PVC, PC and other materials through processes such as plate making, inking and pressurization, so as to batch reproduce the contents of the original manuscripts.

[0003] For example, Chinese patent CN113771492A discloses an environmentally friendly cardboard ink printing process and printing equipment, including a body shell, a working chamber is provided in the body shell, a connecting block is provided in the working chamber, an exhaust gas processor is fixedly provided on the upper surface of the connecting block, a compression chamber with a downward opening is provided in the connecting block, a slidingly connected flattening block is provided in the compression chamber, and the top of the flattening block is connected to the top wall of the compression chamber by a plurality of first springs.

[0004] In the above patent, although the impact of harmful gases generated during printing on the outside air is solved by flattening blocks and exhaust gas processors, when drying the printed products, a dryer is used for hot air drying. The hot air dries the ink slowly and the drying efficiency is low. Moreover, when the equipment is in continuous operation, the energy consumption of the dryer is relatively large. Summary of the invention

[0005] The object of the present invention is to provide an environmentally friendly cardboard ink printing process and printing equipment thereof, so as to solve the problems raised in the above-mentioned background technology that when drying printed products, a dryer is used for hot air drying, the hot air dries the ink slowly, the drying efficiency is low, and when the equipment is in continuous operation, the energy consumption of the dryer is large.

[0006] To achieve the above object, the present invention provides the following technical solution: an environmentally friendly paperboard ink printing process, comprising the following steps: S1. Pretreatment: Select the cardboards that need to be printed, clean the surface of the cardboards in turn, remove dust and oil impurities, and stack the processed cardboards neatly; S2. Parameter adjustment: According to the thickness, size and printing requirements of the paperboard, adjust the printing parameters of the printing equipment, including printing pressure and ink thickness; S3, fast printing: take a separate cardboard and place it in the printing equipment for trial printing, check the printing quality, then add the selected ink into the printing machine to ensure that the ink is evenly distributed, install the prepared printing plate on the printing machine, and feed the cardboard into the printing machine, where the printing machine completes the printing; S4, infrared drying and quality inspection: after printing, place the cardboard on the conveying structure at intervals, send the cardboard into the drying chamber of the equipment, start the infrared equipment for drying, monitor the drying condition of the cardboard, adjust the drying parameters according to the drying condition, move it into the cooling chamber for rapid cooling after drying, and perform post-processing on the cooled printed products; S5, post-processing: Place the qualified cardboard on the workbench of the laminating machine, calibrate the position of the cardboard, and then the laminating machine completes the lamination of the cardboard. After the lamination is completed, the cardboard is cooled and solidified, and the post-processing is completed.

[0007] Preferably, a mounting frame is fixedly connected to one side of the support frame, a fan blade assembly is inserted through the interior of the mounting frame, a bevel gear 2 is fixedly connected to one end of the fan blade assembly, and the bevel gear 2 is rotationally connected to the support frame.

[0008] Preferably, the printing pressure is 0.15-0.25 MPa, and the ink thickness is 0.7-1.2 μm.

[0009] Preferably, when the infrared device is used to dry the paperboard, a temperature measuring device is used to monitor the surface temperature of the paperboard, and the drying temperature is controlled to be 40°C-70°C.

[0010] Preferably, the fan speed in the cooling chamber is 1000-3000 rpm, and the cooling time is 1-5 min.

[0011] Preferably, when checking the printing quality of the trial print sample, the following contents are included: S31. Appearance inspection: Use color cards or samples to compare with the color of printed products, use a colorimeter to measure the color difference, observe the clarity of printed patterns and text, determine whether the edges of lines are clear, and check whether the printed surface is flat and whether there are any defects; S32, Performance test: Use the sticking method to test the adhesion of the ink on the cardboard, then soak the printed matter in water for 10-20 minutes to observe whether the ink fades or falls off; S33, size inspection: Use a caliper to measure the size of the printed cardboard, including length, width and thickness, and whether the edges of the pattern and text are aligned; S34, quality assessment: Evaluate the printing quality of the current sample based on the inspection results of S41, S42 and S43. If the evaluation is qualified, continue batch printing. If the evaluation is unqualified, adjust the printing parameters of the equipment.

[0012] A printing device for an environmentally friendly cardboard ink printing process comprises: a frame, a conveying component is installed on the top of the frame, a printing component is arranged on the top of the conveying component, a drying box is arranged on one side of the printing component, a drying auxiliary mechanism is installed inside the drying box, the drying auxiliary mechanism comprises a drying rack, an infrared lamp tube component and a guide roller, one end of the infrared lamp tube component is fixedly connected to the drying rack, a hydraulic push rod is fixedly connected to the top of the drying rack, the top of the hydraulic push rod is fixedly connected to the inner wall of the drying box, a temperature sensor 1 is fixedly connected to the top of the inner cavity of the drying box, an auxiliary frame is fixedly connected to one side of the inner wall of the drying box, and one side of the auxiliary frame is rotatably connected to the guide roller.

[0013] Preferably, a fixing rod is fixedly connected to one side of the inner wall of the drying box, one end of the fixing rod is fixedly connected to a connecting plate, a supporting rod is hingedly connected to the bottom of the connecting plate, and one end of the supporting rod is hingedly connected to a detection plate.

[0014] Preferably, a contact sensor and a second temperature sensor are fixedly connected to the bottom of the detection plate, and an electric push rod is fixedly connected to the top of the detection plate, and the top of the electric push rod is fixedly connected to the connecting plate.

[0015] Preferably, the top of the drying box is fixedly connected to an induced draft fan, one end of the air outlet of the induced draft fan is fixedly connected to a guide pipe, one end of the guide pipe is fixedly connected to a purifier, and the bottom of the purifier is fixedly connected to the drying box.

[0016] Preferably, a cooling box is fixedly connected to one side of the drying box, the bottom of the cooling box is fixedly connected to the frame, and the top of the cooling box is fixedly connected to a fan assembly.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the quality inspection of the trial print sample can be realized through appearance, performance, size inspection and quality evaluation. The quality inspection of the paperboard is also carried out after the continuous printing. The double quality inspection can improve the yield of paperboard printing. The infrared drying treatment after printing can reduce the generation of harmful gases during drying, reduce the workload of the purification equipment, and the drying speed is fast, which can improve the drying efficiency and reduce the energy consumption, thereby improving the environmental protection effect when the equipment is used.

[0018] 2. In the present invention, the bottom of the hydraulic push rod is fixedly connected to the drying rack, and the drying rack is fixedly connected to the infrared lamp tube assembly. The cardboard is guided by the guide roller and moved to the bottom of the drying rack. The infrared lamp tube assembly irradiates the cardboard, thereby realizing rapid drying of the cardboard. During drying, the temperature inside the drying box is detected by a temperature sensor, thereby adjusting the drying temperature, so as to maintain the drying temperature inside the drying box basically stable.

[0019] 3. In the present invention, an electric push rod is fixedly connected between the connecting plate and the detection plate, and the top of the detection plate is hinged to the support rod. The electric push rod is used to drive the detection plate to move downward until the bottom of the contact sensor contacts the cardboard. During the downward movement, the length of the support rod is stretched and the inclination changes greatly, so the top of the detection plate is supported and reinforced. The surface temperature of the cardboard can be detected by the second temperature sensor to avoid damage to the surface of the cardboard by high temperature, thereby ensuring the drying effect of the infrared lamp tube assembly on the cardboard. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of a printing device for an environmentally friendly cardboard ink printing process of the present invention; Figure 2 A schematic diagram of the fan structure installation of a printing device for an environmentally friendly cardboard ink printing process of the present invention; Figure 3 It is a schematic diagram of the connection between the auxiliary frame and the drying box structure of the printing equipment of the environmentally friendly cardboard ink printing process of the present invention; Figure 4 It is a schematic diagram of the installation structure of the temperature sensor 2 of the printing equipment of the environmentally friendly paperboard ink printing process of the present invention; Figure 5 The present invention is a schematic diagram of the installation of a support rod structure of a printing device for an environmentally friendly cardboard ink printing process.

[0021] In the figure: 1. Conveying assembly; 2. Printing assembly; 3. induced draft fan; 4. Guide tube; 5. Purifier; 6. Cooling box; 7. Drying box; 8. Rack; 9. Fan assembly; 10. Drying rack; 11. Auxiliary rack; 12. Infrared lamp assembly; 13. Fixing rod; 14. Hydraulic push rod; 15. Temperature sensor 1; 16. Guide roller; 17. Detection plate; 18. Contact sensor; 19. Temperature sensor 2; 20. Support rod; 21. Electric push rod; 22. Connecting plate. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Embodiment 1: An environmentally friendly cardboard ink printing process, comprising the following steps: Step 1: Pretreatment: Select the cardboard that needs to be printed, clean the surface of the cardboard in turn, remove dust and oil impurities, and stack the processed cardboard neatly; Step 2: Parameter adjustment: According to the thickness, size and printing requirements of the paperboard, adjust the printing parameters of the printing equipment, including printing pressure and ink thickness. The printing pressure is 0.2MPa and the ink thickness is 0.9μm. Step 3, fast printing: take a separate cardboard and place it in the printing equipment for trial printing, check the printing quality, then add the selected ink into the printing machine to ensure that the ink is evenly distributed, install the prepared printing plate on the printing machine, and feed the cardboard into the printing machine, where the printing machine completes the printing; When checking the printing quality of the trial print sample, the following should be included: 31. Appearance inspection: Use color cards or samples to compare with the color of printed products, use a colorimeter to measure color differences, observe the clarity of printed patterns and texts, determine whether the edges of lines are clear, and check whether the printed surface is flat and whether there are any defects; 32. Performance test: Use the pasting method to test the adhesion of the ink on the cardboard, then soak the printed matter in water for 15 minutes to observe whether the ink fades or falls off; 33. Size inspection: Use a caliper to measure the size of the printed cardboard, including length, width and thickness, and whether the edges of the pattern and text are aligned; 34. Quality evaluation: Evaluate the printing quality of the current sample based on the inspection results of 41, 42 and 43. If the evaluation is qualified, continue batch printing. If the evaluation is unqualified, adjust the printing parameters of the equipment.

[0024] Step 4: Infrared drying and quality inspection: After printing, place the cardboard on the conveying structure at intervals, send the cardboard into the drying chamber of the equipment, start the infrared equipment for drying, monitor the drying condition of the cardboard, adjust the drying parameters according to the drying condition, move it into the cooling chamber for rapid cooling after drying, and post-process the cooled printed products; When the infrared equipment is drying the cardboard, the temperature of the cardboard surface is monitored by temperature measuring equipment, the drying temperature is controlled to 55°C, the fan speed in the cooling chamber is 1500 rpm, and the cooling time is 3 minutes.

[0025] Step 5, post-processing: Place the qualified cardboard on the workbench of the laminating machine, calibrate the position of the cardboard, and then the laminating machine completes the lamination of the cardboard. After the lamination is completed, the cardboard is cooled and solidified, and the post-processing is completed.

[0026] Example 2: Reference Figure 1-Figure 5The figure shows: a printing device for an environmentally friendly cardboard ink printing process, a printing device for an environmentally friendly cardboard ink printing process, comprising: a frame 8, a transmission component 1 is installed on the top of the frame 8, a printing component 2 is arranged on the top of the transmission component 1, a drying box 7 is arranged on one side of the printing component 2, a drying auxiliary mechanism is installed inside the drying box 7, and the drying auxiliary mechanism includes a drying rack 10, an infrared lamp tube component 12 and a guide roller 16, one end of the infrared lamp tube component 12 is fixedly connected to the drying rack 10, a hydraulic push rod 14 is fixedly connected to the top of the drying rack 10, and the top of the hydraulic push rod 14 is fixedly connected to the inner wall of the drying box 7 A temperature sensor 15 is fixedly connected to the top of the inner cavity of the drying box 7, an auxiliary frame 11 is fixedly connected to one side of the inner wall of the drying box 7, one side of the auxiliary frame 11 is rotatably connected to a guide roller 16, a fixed rod 13 is fixedly connected to one side of the inner wall of the drying box 7, one end of the fixed rod 13 is fixedly connected to a connecting plate 22, a support rod 20 is hinged to the bottom of the connecting plate 22, one end of the support rod 20 is hinged to a detection plate 17, a contact sensor 18 and a temperature sensor 19 are fixedly connected to the bottom of the detection plate 17, and an electric push rod 21 is fixedly connected to the top of the detection plate 17, and the top of the electric push rod 21 is fixedly connected to the connecting plate 22.

[0027] The top of the drying box 7 is fixedly connected to an induced draft fan 3, one end of the air outlet of the induced draft fan 3 is fixedly connected to a guide pipe 4, one end of the guide pipe 4 is fixedly connected to a purifier 5, the bottom of the purifier 5 is fixedly connected to the drying box 7, one side of the drying box 7 is fixedly connected to a cooling box 6, the bottom of the cooling box 6 is fixedly connected to a frame 8, and the top of the cooling box 6 is fixedly connected to a fan assembly 9.

[0028] In this embodiment, the frame 8 can support and reinforce the bottom of the conveying component 1, the printing component 2 and the drying box 7. The conveying component 1 can assist the movement of the cardboard between multiple stations. The printing component 2 can complete the automatic printing of the cardboard. The auxiliary frame 11 and the guide roller 16 can guide the cardboard into the drying box 7 so that the cardboard can enter the drying box 7 smoothly. The hydraulic push rod 14 can support the top of the drying rack 10 to ensure the stable installation of the drying rack 10 and the infrared lamp tube assembly 12 inside the drying box 7. The infrared lamp tube assembly 12 can realize rapid drying of the cardboard. A regulator is installed on the top of the drying rack 10 to adjust the power of the infrared lamp tube assembly 12. The temperature sensor 15 can monitor the drying box 7. The temperature change inside the auxiliary drying box 7 is convenient for maintaining the drying temperature inside the auxiliary drying box 7 basically constant. The connection between the connecting plate 22 and the inner wall of the drying box 7 can be realized by the fixing rod 13, ensuring the stable use of the connecting plate 22 inside the drying box 7. The connection between the connecting plate 22 and the detection plate 17 can be realized by the electric push rod 21, so as to adjust the use height of the detection plate 17. The support rod 20 is a telescopic rod with an inner rod and an outer rod sleeved. The two ends of the support rod 20 are respectively hinged to the connecting plate 22 and the detection plate 17. The support rod 20 can support both sides of the electric push rod 21, so as to improve the stability of the detection plate 17 when it is lifted or lowered. The downward movement height of the detection plate 17 can be limited by the contact sensor 18, and the surface temperature of the cardboard can be detected by the temperature sensor 19; At the same time, the drying box 7 can be used to support the bottom of the induced draft fan 3. The inner cavity of the drying box 7 is connected to the induced draft fan 3. The induced draft fan 3 can accelerate the discharge of the gas inside the drying box 7, so that the gas can smoothly enter the purifier 5 for purification after being guided by the guide pipe 4. An air inlet is provided on one side of the drying box 7 to balance the air pressure inside the drying box 7 and ensure the air circulation inside the drying box 7. The drying box 7 can be used to support and reinforce one side of the cooling box 6. The fan assembly 9 can accelerate the air flow inside the cooling box 6, thereby realizing rapid cooling of the paperboard.

[0029] The working principle of the device is as follows: first, the cardboard to be printed is placed on the conveying assembly 1, and the driving structure of the conveying assembly 1 is used to drive the cardboard to move on the top of the frame 8. First, the cardboard is moved to the bottom of the printing assembly 2, and the printing is performed by the printing assembly 2. Then, the cardboard is sent to the drying box 7, and the cardboard is guided by the guide roller 16. At this time, the guide roller 16 does not contact the printed part on the cardboard. Then, the cardboard enters the bottom of the drying rack 10, and the infrared lamp assembly 12 is used to dry the cardboard. The temperature sensor 15 is used to detect the temperature inside the drying box 7, and then the electric push rod 21 is used to drive the detection plate 17 to move downward, so that the detection plate 17 is driven downward by the electric push rod 21. The contact sensor 18 at the bottom of the measuring plate 17 contacts the cardboard. At this time, the measuring plate 17 no longer moves downward, and then the temperature sensor 19 is used to detect the temperature of the surface of the cardboard. According to the temperature sensor 15 and the temperature sensor 2 19, a signal can be sent to the control terminal. After receiving the signal, the control terminal adjusts the power of the infrared lamp tube assembly 12. During the drying process, the induced draft fan 3 is used to extract the air inside the drying box 7. The gas is guided by the guide pipe 4 and then enters the purifier 5 for purification. After being treated, it is discharged from the exhaust port on one side of the purifier 5. After the cardboard is dried, it continues to move to the cooling box 6 and is cooled by the fan assembly 9.

[0030] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An environmentally friendly cardboard ink printing process, characterized in that: The following steps are involved: S1. Pretreatment: Select the cardboards that need to be printed, clean the surface of the cardboards in turn, remove dust and oil impurities, and stack the processed cardboards neatly; S2. Parameter adjustment: According to the thickness, size and printing requirements of the paperboard, adjust the printing parameters of the printing equipment, including printing pressure and ink thickness; S3, fast printing: take a separate cardboard and place it in the printing equipment for trial printing, check the printing quality, then add the selected ink into the printing machine to ensure that the ink is evenly distributed, install the prepared printing plate on the printing machine, and feed the cardboard into the printing machine, where the printing machine completes the printing; S4, infrared drying and quality inspection: after printing, place the cardboard on the conveying structure at intervals, send the cardboard into the drying chamber of the equipment, start the infrared equipment for drying, monitor the drying condition of the cardboard, adjust the drying parameters according to the drying condition, move it into the cooling chamber for rapid cooling after drying, and perform post-processing on the cooled printed products; S5, post-processing: Place the qualified cardboard on the workbench of the laminating machine, calibrate the position of the cardboard, and then the laminating machine completes the lamination of the cardboard. After the lamination is completed, the cardboard is cooled and solidified, and the post-processing is completed.

2. The environmentally friendly cardboard ink printing process according to claim 1, characterized in that: The printing pressure is 0.15-0.25 MPa, and the ink thickness is 0.7-1.2 μm.

3. The environmentally friendly cardboard ink printing process according to claim 1, characterized in that: In S4, when the infrared device dries the paperboard, the temperature of the paperboard surface is monitored by a temperature measuring device, and the drying temperature is controlled to be 40°C-70°C.

4. The environmentally friendly cardboard ink printing process according to claim 1, characterized in that: In S4, the fan speed in the cooling chamber is 1000-3000 rpm, and the cooling time is 1-5 min.

5. The environmentally friendly cardboard ink printing process according to claim 1, characterized in that: When checking the printing quality of the trial print sample, the following should be included: S31. Appearance inspection: Use color cards or samples to compare with the color of printed products, use a colorimeter to measure the color difference, observe the clarity of printed patterns and text, determine whether the edges of lines are clear, and check whether the printed surface is flat and whether there are any defects; S32, Performance test: Use the sticking method to test the adhesion of the ink on the cardboard, then soak the printed matter in water for 10-20 minutes to observe whether the ink fades or falls off; S33, size inspection: Use a caliper to measure the size of the printed cardboard, including length, width and thickness, and whether the edges of the pattern and text are aligned; S34, quality assessment: Evaluate the printing quality of the current sample based on the inspection results of S41, S42 and S43. If the evaluation is qualified, continue batch printing. If the evaluation is unqualified, adjust the printing parameters of the equipment.

6. A printing device for an environmentally friendly cardboard ink printing process, characterized in that: An environmentally friendly cardboard ink printing process according to any one of claims 1 to 5 comprises: a frame (8), a conveying assembly (1) is installed on the top of the frame (8), a printing assembly (2) is arranged on the top of the conveying assembly (1), a drying box (7) is arranged on one side of the printing assembly (2), a drying auxiliary mechanism is installed inside the drying box (7), the drying auxiliary mechanism comprises a drying frame (10), an infrared lamp tube assembly (12) and a guide roller (16), one end of the infrared lamp tube assembly (12) is fixedly connected to the drying frame (10), a hydraulic push rod (14) is fixedly connected to the top of the drying frame (10), the top of the hydraulic push rod (14) is fixedly connected to the inner wall of the drying box (7), a temperature sensor 1 (15) is fixedly connected to the top of the inner cavity of the drying box (7), an auxiliary frame (11) is fixedly connected to one side of the inner wall of the drying box (7), and one side of the auxiliary frame (11) is rotatably connected to the guide roller (16).

7. The printing equipment of the environmentally friendly cardboard ink printing process according to claim 6, characterized in that: A fixing rod (13) is fixedly connected to one side of the inner wall of the drying box (7); one end of the fixing rod (13) is fixedly connected to a connecting plate (22); a supporting rod (20) is hingedly connected to the bottom of the connecting plate (22); and one end of the supporting rod (20) is hingedly connected to a detection plate (17).

8. The printing equipment of the environmentally friendly cardboard ink printing process according to claim 7, characterized in that: The bottom of the detection plate (17) is fixedly connected to a contact sensor (18) and a second temperature sensor (19), and the top of the detection plate (17) is fixedly connected to an electric push rod (21), and the top of the electric push rod (21) is fixedly connected to a connecting plate (22).

9. The printing equipment of the environmentally friendly cardboard ink printing process according to claim 6, characterized in that: The top of the drying box (7) is fixedly connected to an induced draft fan (3), one end of an air outlet of the induced draft fan (3) is fixedly connected to a guide pipe (4), one end of the guide pipe (4) is fixedly connected to a purifier (5), and the bottom of the purifier (5) is fixedly connected to the drying box (7).

10. The printing equipment of the environmentally friendly cardboard ink printing process according to claim 6, characterized in that: A cooling box (6) is fixedly connected to one side of the drying box (7), the bottom of the cooling box (6) is fixedly connected to the frame (8), and the top of the cooling box (6) is fixedly connected to a fan assembly (9).

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