Environment-friendly color printing paper box production process and production equipment thereof
By using biodegradable plant fiber pulp, environmentally friendly water-based inks, and plant-based varnishes, combined with a spraying assembly and a swirling mechanism, the problem of non-degradable film pollution in color-printed paper box production has been solved, achieving environmentally friendly production and simplified recycling.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-21
- Publication Date
- 2026-04-07
AI Technical Summary
In the current production of color-printed paper boxes, the non-degradable plastic film used in the lamination process causes environmental pollution, and the recycling process is complicated and increases costs.
Paperboard is made from biodegradable plant fiber pulp, using environmentally friendly water-based inks and plant-based varnishes. It combines low-temperature infrared drying equipment and die-cutting and creasing technology to replace the traditional lamination process, and achieves uniform coating of varnish through a spraying component and a swirling mechanism.
Reduce environmental pollution, simplify the recycling process, lower production costs, and ensure the gloss and quality of printed surfaces to achieve environmentally friendly production.
Smart Images
Figure CN121798968A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of paper box production technology, specifically to an environmentally friendly color-printed paper box production process and its production equipment. Background Technology
[0002] Color printing of paper boxes is a common process in the packaging manufacturing industry. Its existing technology process usually starts with paperboard preparation. Wood pulp or recycled pulp is used as raw material to make basic paperboard. After dust removal and humidity conditioning, it enters the color printing process. This process usually uses roller printing machines or flexographic printing machines, with solvent-based or water-based inks to print the preset pattern on the surface of the paperboard. After color printing is completed, the surface of the paperboard is laminated. The lamination process generally uses a laminating machine to attach a film to the printed surface. The laminated film can effectively protect the printed pattern from damage such as friction and scratches, while also improving the gloss and smoothness of the printed surface.
[0003] However, the existing technology has the following problems: The films used in existing lamination processes are mostly non-degradable plastic materials, which are difficult to degrade naturally after disposal and easily cause environmental pollution. In addition, when recycling laminated cardboard boxes, an additional film peeling process is required, which not only increases the complexity of the recycling process but also increases the recycling cost. Summary of the Invention
[0004] The purpose of this invention is to provide an environmentally friendly color printing paper box production process and equipment to solve the above problems. It aims to overcome the shortcomings of existing lamination processes, which mostly use non-degradable plastic films that are difficult to degrade naturally after disposal and easily cause environmental pollution. Details are provided below.
[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides an environmentally friendly color-printed paper box production process, comprising the following steps: Step 1: Paperboard preparation. Degradable plant fiber pulp is selected to prepare paperboard. After the paperboard is prepared, dust removal equipment is used for dust removal. Step 2: Environmentally friendly water-based ink color printing. Environmentally friendly water-based ink is used to print on cardboard using roller printing equipment. During the printing process, waste gas is collected and treated using a waste gas collection device. Step 3: Apply varnish to the printed surface. Use plant-based varnish and apply it to the printed surface of the cardboard using varnishing equipment to improve the gloss of the printed surface. Step 4: Drying and shaping. The coated cardboard is dried using a low-temperature infrared drying device. Step 5: Die-cutting and creasing. The cardboard is cut using a die-cutting device and creasing is performed using a creasing device. Step 6: Fold and shape, fold the cardboard into a box according to the preset creases; Step 7: Finished product inspection, testing printing quality, varnishing effect, structural stability and environmental protection indicators.
[0006] An environmentally friendly color printing paper box production equipment includes a frame with a conveyor belt for conveying cardboard. The frame also includes a spraying assembly comprising a rotating drum and a trough. The trough contains varnish and is rotatably connected to the rotating drum. The rotating drum has multiple rows of liquid holes, and the bottom of the trough has a long groove. The rotating drum rotates so that the multiple rows of liquid holes pass sequentially below the long groove, allowing the varnish to drip from the trough onto the cardboard below. Two coating rollers are rotatably mounted on the frame, and one set of coating rollers applies the varnish evenly to the cardboard by rotating.
[0007] Preferably, the frame is equipped with a first support and a second support, and the rotating drum is rotatably connected to the first support and the second support. A fixed pipe is fixedly connected to the first support, and the fixed pipe is rotatably connected to the rotating drum. Multiple connecting rods are connected to the outer wall of the fixed pipe inside the rotating drum, and the ends of the multiple connecting rods away from the fixed pipe are all connected to the inner wall of the drum.
[0008] Preferably, a first motor is mounted on the second support, and the output end of the first motor is connected to the end of the rotating drum away from the first support.
[0009] Preferably, the fixing tube is hollow, with one end of the fixing tube inside the rotating drum rotatably connected to the inner wall of the rotating drum, and the other end of the fixing tube outside the rotating drum having an oil inlet. Multiple through grooves are provided in the area of the fixing tube inside the rotating drum.
[0010] Preferably, the spraying assembly further includes a swirling mechanism located inside the trough. The swirling mechanism includes two columns, both of which are connected to a fixed pipe. A sliding rod is slidably connected through the two columns. Multiple rotating shafts are rotatably connected to the sliding rods, and multiple blades are connected to the rotating shafts. A spring is connected to the outer wall of each column, and the end of the spring away from the column is connected to the sliding rod. An arc-shaped ring is connected to the inner wall of the rotating cylinder. A ball head is provided at the end of each column, and the ball head slides in contact with the arc-shaped ring. The arc-shaped ring has an undulating wave surface, and the ball head slides in contact with the wave surface. When the arc-shaped ring rotates, the ball head drives the sliding rod to move back and forth.
[0011] Preferably, a gear is connected to the bottom of the rotating shaft, and multiple racks are connected to the inner wall of the long groove of the groove cylinder, with the gears at the bottom of the rotating shaft meshing with the multiple racks respectively.
[0012] Preferably, the spraying assembly further includes a liquid level indicator mechanism, which includes a float, a smooth rod installed inside the tank, the float being slidably sleeved on the smooth rod, a slide frame slidably connected to the inner wall of the fixed tube, a connecting rod hinged to one end of the slide frame, and the end of the connecting rod away from the slide frame being hinged to the float. When the float moves upward, the connecting rod can drive the slide frame to push away from the smooth rod.
[0013] Preferably, the fixed tube has an observation window near the first support, a scale plate is connected to the fixed tube and is located next to the observation window, and the slide is provided with a sliding ring and the sliding range of the sliding ring is located inside the observation window.
[0014] Preferably, a second motor is mounted on the frame, the second motor has two output terminals, and the two output terminals of the second motor are respectively connected to two coating rollers.
[0015] The beneficial effects are: 1. This environmentally friendly color-printed paper box production process, through the setting of the varnishing step on the printing surface, is more environmentally friendly than the traditional lamination process. The biodegradable plant-based varnish reduces environmental pollution and is simpler to operate. It further implements the concept of environmental protection while reducing production costs.
[0016] 2. This environmentally friendly color printing paper box production equipment, through the setting of the spraying component, enables multiple rows of liquid holes to drip varnish onto the cardboard in sequence during the rotation of the drum, achieving the technical effect of uniform varnish spraying and avoiding varnish accumulation that would cause uneven coating.
[0017] 3. This environmentally friendly color printing paper box production equipment, through the setting of the stirring mechanism, enables the blades on the rotating shaft to stir the varnish through compound motion, ensuring the uniformity of the varnish and preventing sedimentation and stratification caused by prolonged static standing; through the setting of the liquid level indication mechanism, the float, in cooperation with the connecting rod, achieves the technical effect of converting liquid level changes into slide displacement changes. The observation window, scale plate, and slip ring work together to achieve a visual indication of the liquid level in the tank, making it easy for staff to observe the liquid level in the tank and replenish the varnish in a timely manner. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the spraying component structure of the present invention; Figure 3 This is a schematic diagram of the rotating drum structure of the present invention; Figure 4 This is a schematic diagram of the grooved cylinder structure of the present invention; Figure 5 This is a schematic diagram of the fixed tube structure of the present invention; Figure 6 This is a schematic diagram of the stirring mechanism of the present invention; Figure 7 This is a schematic diagram of the rack structure of the present invention; Figure 8 This is a schematic diagram of the liquid level indicator mechanism of the present invention; Figure 9 This is a schematic diagram of the scale plate structure of the present invention.
[0020] The annotations in the attached figures are explained as follows: 1. Frame; 2. First support; 3. Second support; 4. Spraying assembly; 41. Rotating drum; 42. First motor; 43. Fixing pipe; 44. Connecting rod; 45. Trough; 5. Stirring mechanism; 51. Column; 52. Slide rod; 53. Shaft; 54. Blade; 55. Arc ring; 56. Spring; 57. Gear; 58. Rack; 6. Liquid level indicator mechanism; 61. Smooth rod; 62. Float; 63. Connecting rod; 64. Slide carriage; 65. Scale plate; 7. Coating roller; 8. Second motor. Detailed Implementation
[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.
[0022] One embodiment of the present invention is as follows: An environmentally friendly color printing paper box production process includes the following steps: Step 1: Paperboard preparation. Degradable plant fiber pulp is selected to prepare paperboard, which responds to the concept of environmental protection and reduces the environmental burden. After the paperboard is prepared, dust removal equipment is used to remove dust to avoid impurities affecting the quality of subsequent processing. Step 2: Environmentally friendly water-based ink color printing. Environmentally friendly water-based ink is used to print on cardboard using roller printing equipment. During the printing process, a waste gas collection device is used to collect and treat waste gas, reducing the pollution of indoor and outdoor environments by printing waste gas. Step 3: Apply varnish to the printed surface. Use plant-based varnish and apply it to the printed surface of the cardboard using varnishing equipment to improve the gloss of the printed surface. Compared with the traditional lamination process, biodegradable plant-based varnish is more environmentally friendly and simpler to operate. It reduces production costs and further responds to the concept of environmental protection. Step 4: Drying and shaping. Low-temperature infrared drying equipment is used to dry the varnished cardboard. Low-temperature infrared drying equipment has low energy consumption and can avoid high-temperature deformation of cardboard. Step 5: Die-cutting and creasing. Use a die-cutting device to cut the cardboard and a creasing device to creasing it to facilitate subsequent folding operations. Step 6: Fold and shape, fold the cardboard into a box according to the preset creases; Step 7: Finished product inspection. Test the printing quality, varnishing effect, structural stability and environmental protection indicators, screen qualified products and ensure the quality of products leaving the factory.
[0023] Another embodiment of the present invention is as follows: Please see Figure 1 - Figure 5 An environmentally friendly color printing paper box production equipment includes a frame 1, on which a conveyor belt for conveying paperboard is provided. The conveyor belt connects the environmentally friendly water-based ink color printing process and the drying and setting process. A spraying assembly 4 is provided on the frame 1, comprising a rotating drum 41 and a trough 45. The trough 45 is filled with varnish and is rotatably connected to the inside of the rotating drum 41. Multiple rows of liquid holes are provided on the rotating drum 41, and a long groove is provided at the bottom of the trough 45. The rotating drum 41 can rotate to allow the multiple rows of liquid holes to pass sequentially below the long groove. The square liquid holes allow the varnish in the tank 45 to drip onto the cardboard below. The liquid holes in the rotating drum 41 can also drip varnish. When the liquid holes are not located in the long groove, they are blocked and closed by the tank 45. When the liquid holes pass through the long groove, the varnish in the tank 45 flows through the long groove to a row of liquid holes. This row of liquid holes evenly distributes the varnish onto the printing surface of the cardboard. Therefore, during the rotation of the rotating drum 41, multiple rows of liquid holes can sequentially drip varnish onto the cardboard, achieving the technical effect of evenly distributing the varnish and avoiding varnish accumulation that would cause uneven coating.
[0024] Furthermore, two coating rollers 7 are rotatably mounted on the frame 1. The set of coating rollers 7 spreads the varnish evenly on the cardboard by rotating. A second motor 8 is mounted on the frame 1. The second motor 8 has two output ends, which are respectively connected to the two coating rollers 7. The conveyor belt transports the cardboard with completed color printing to the area below the spraying assembly 4. After the varnish is spread by the spraying assembly 4, the cardboard passes through the coating rollers 7. The second motor 8 drives the two coating rollers 7 to rotate. The two coating rollers 7 spread the varnish evenly on the printed surface of the cardboard by rotating.
[0025] Furthermore, a first support 2 and a second support 3 are installed on the frame 1. The rotating drum 41 is rotatably connected to the first support 2 and the second support 3. A fixed pipe 43 is fixedly connected to the first support 2. The fixed pipe 43 is rotatably connected to the rotating drum 41. Multiple connecting rods 44 are connected to the outer wall of the fixed pipe 43 inside the rotating drum 41. The ends of the multiple connecting rods 44 away from the fixed pipe 43 are all connected to the inner wall of the trough 45. The first support 2 and the second support 3 are symmetrically arranged on the frame 1 to provide rotational support for the rotating drum 41. The fixed pipe 43 and the rotating drum 41 form a nested rotational fit. The fixed pipe 43 provides fixed support for the trough 45 without affecting the rotation of the rotating drum 41, so that the trough 45 remains fixed inside the rotating drum 41. This ensures that the trough 45 remains fixed when the rotating drum 41 rotates, and that the long trough and liquid hole cooperate to carry out the varnish spraying operation.
[0026] In addition, a first motor 42 is installed on the second support 3. The output end of the first motor 42 is connected to the end of the rotating drum 41 away from the first support 2. After the first motor 42 is started, it drives the rotating drum 41 to rotate, so as to realize the varnish spraying operation.
[0027] In addition, the fixing tube 43 is hollow. One end of the fixing tube 43 located inside the rotating drum 41 is rotatably connected to the inner wall of the rotating drum 41, and the other end of the fixing tube 43 located outside the rotating drum 41 is provided with an oil filling port. Multiple through grooves are opened in the area of the fixing tube 43 located inside the rotating drum 41. When adding varnish, varnish is injected into the fixing tube 43 through the oil filling port, and the fixing tube 43 replenishes the varnish into the groove cylinder 45 through the through grooves.
[0028] Based on the above embodiments, another embodiment of the present invention is as follows: Please see Figure 5 - Figure 7The spraying assembly 4 also includes a swirling mechanism 5, located inside the trough cylinder 45. The swirling mechanism 5 includes two columns 51, both connected to a fixed pipe 43. A sliding rod 52 is slidably connected through each column 51. Multiple rotating shafts 53 are rotatably connected to each sliding rod 52, and multiple blades 54 are connected to each rotating shaft 53. A spring 56 is connected to the outer wall of each column 51, with the end of the spring 56 away from the column 51 connected to the sliding rod 52. An arc-shaped ring 55 is connected to the inner wall of the rotating cylinder 41. A ball head is provided at the end of each column 51, slidingly contacting the arc-shaped ring 55. The arc-shaped ring 55 has undulating wave surfaces, with the ball head slidingly contacting the wave surfaces. When the ring 55 rotates, it drives the slide rod 52 to move back and forth through the ball head; the two springs 56 always apply elastic force to the slide rod 52, so that the ball head of the slide rod 52 always abuts against the wave surface of the arc ring 55. When the rotating cylinder 41 rotates, the arc ring 55 rotates synchronously. The wave surface of the arc ring 55 slides in contact with the ball head at the end of the column 51. The undulation of the wave surface will push the ball head to drive the slide rod 52 to make reciprocating linear motion along the column 51. The reciprocating movement of the slide rod 52 drives multiple rotating shafts 53 to move synchronously, so that the blades 54 on the multiple rotating shafts 53 move back and forth synchronously. The blades 54 stir the varnish in the trough cylinder 45 through reciprocating movement, making the varnish texture more uniform.
[0029] It is worth noting that a gear 57 is connected to the bottom of the rotating shaft 53, and multiple racks 58 are connected to the inner wall of the long groove of the groove cylinder 45. The gears 57 at the bottom of the multiple rotating shafts 53 mesh with the multiple racks 58 respectively. When the rotating shaft 53 moves back and forth, it drives the gears 57 at its bottom to move synchronously. When the gears 57 move, they rotate by meshing with the racks 58, so that the rotating shaft 53 can also rotate back and forth by the cooperation of the gears 57 and the racks 58 during the reciprocating movement, achieving the effect of compound motion. The blades 54 on the rotating shaft 53 further optimize the stirring effect of the varnish through compound motion, ensuring the uniformity of the varnish and avoiding sedimentation and stratification of the varnish when it is left to stand for a long time.
[0030] Based on the above embodiments, another embodiment of the present invention is as follows: Please see Figure 5 , Figure 8 , Figure 9The spraying assembly 4 also includes a liquid level indicator mechanism 6, which includes a float 62. A smooth rod 61 is installed inside the tank 45. The float 62 is slidably sleeved on the smooth rod 61. A slide 64 is slidably connected to the inner wall of the fixed pipe 43. A connecting rod 63 is hinged to one end of the slide 64. The end of the connecting rod 63 away from the slide 64 is hinged to the float 62. When the float 62 moves upward, the connecting rod 63 can drive the slide 64 to push away from the smooth rod 61. The float 62 can float on the surface of the clear oil in the tank 45. The smooth rod 61 supports the float. 62 acts as a sliding guide, allowing the float 62 to slide up and down along the polished rod 61. When the level of the polished oil in the tank 45 rises, the float 62 moves upward and drives the slide 64 to move closer to the polished rod 61 via the connecting rod 63. Conversely, when the float 62 moves downward, the slide 64 moves away from the polished rod 61 via the connecting rod 63. This allows the float 62 to convert the change in liquid level into a change in the displacement of the slide 64 through the cooperation of the connecting rod 63. By judging the displacement of the slide 64, the liquid level can be determined.
[0031] It is worth mentioning that an observation window is provided on the part of the fixed pipe 43 near the first support 2. A scale plate 65 is connected to the fixed pipe 43 and is located next to the observation window. A slip ring is provided on the slide 64, and the sliding range of the slip ring is located within the observation window. The slip ring slides synchronously with the slide 64. The operator can directly observe the position of the slip ring through the observation window on the fixed pipe 43. The scale plate 65 is marked with the corresponding liquid level scale. The scale that the slip ring points to is the current level of the clear varnish in the tank 45. The observation window, scale plate 65 and slip ring work together to realize the visual indication of the liquid level in the tank 45, which makes it convenient for the staff to observe the liquid level in the tank 45 and replenish the clear varnish in time.
[0032] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.
Claims
1. An environmentally friendly color printing paper box production process, characterized in that: Includes the following steps: Step 1: Paperboard preparation. Degradable plant fiber pulp is selected to prepare paperboard. After the paperboard is prepared, dust removal equipment is used for dust removal. Step 2: Environmentally friendly water-based ink color printing. Environmentally friendly water-based ink is used to print on cardboard using roller printing equipment. During the printing process, waste gas is collected and treated using a waste gas collection device. Step 3: Apply varnish to the printed surface. Use plant-based varnish and apply it to the printed surface of the cardboard using varnishing equipment to improve the gloss of the printed surface. Step 4: Drying and shaping. The coated cardboard is dried using a low-temperature infrared drying device. Step 5: Die-cutting and creasing. The cardboard is cut using a die-cutting device and creasing is performed using a creasing device. Step 6: Fold and shape, fold the cardboard into a box according to the preset creases; Step 7: Finished product inspection, testing printing quality, varnishing effect, structural stability and environmental protection indicators.
2. An environmentally friendly color-printed paper box production equipment, applied to the environmentally friendly color-printed paper box production process described in claim 1, characterized in that: Includes a frame (1) on which a conveyor belt for conveying cardboard is provided; The frame (1) is provided with a spraying assembly (4), which includes a rotating drum (41) and a trough (45). The trough (45) is filled with varnish and is rotatably connected to the inside of the rotating drum (41). The rotating drum (41) has multiple rows of liquid holes, and the bottom of the trough (45) has a long groove. The rotating drum (41) can rotate to make the multiple rows of liquid holes pass through the bottom of the long groove in sequence. The liquid holes passing through the bottom of the long groove can drip the varnish in the trough (45) onto the cardboard below. Two coating rollers (7) are rotatably mounted on the frame (1). A set of coating rollers (7) applies varnish evenly to the cardboard by rotating.
3. The environmentally friendly color printing paper box production equipment according to claim 2, characterized in that: The frame (1) is equipped with a first support (2) and a second support (3). The rotating drum (41) is rotatably connected to the first support (2) and the second support (3). A fixed pipe (43) is fixedly connected to the first support (2). The fixed pipe (43) is rotatably connected to the rotating drum (41). The outer wall of the fixed pipe (43) inside the rotating drum (41) is connected to multiple connecting rods (44). The ends of the multiple connecting rods (44) away from the fixed pipe (43) are all connected to the inner wall of the groove (45).
4. The environmentally friendly color printing paper box production equipment according to claim 3, characterized in that: The second support (3) is equipped with a first motor (42), and the output end of the first motor (42) is connected to the end of the rotating drum (41) away from the first support (2).
5. The environmentally friendly color printing paper box production equipment according to claim 4, characterized in that: The fixed tube (43) is hollow. One end of the fixed tube (43) inside the rotating drum (41) is rotatably connected to the inner wall of the rotating drum (41). The other end of the fixed tube (43) outside the rotating drum (41) is provided with an oil inlet. Multiple through slots are opened in the area of the fixed tube (43) inside the rotating drum (41).
6. The environmentally friendly color printing paper box production equipment according to claim 4, characterized in that: The spraying assembly (4) also includes a swirling mechanism (5), which is located inside the trough (45). The swirling mechanism (5) includes two columns (51), both of which are connected to a fixed pipe (43). A sliding rod (52) is slidably connected through the two columns (51). Multiple rotating shafts (53) are rotatably connected to the sliding rods (52), and multiple blades (54) are connected to the rotating shafts (53). 51) A spring (56) is connected to the outer wall. The end of the spring (56) away from the column (51) is connected to the slide rod (52). An arc ring (55) is connected to the inner wall of the rotating cylinder (41). A ball head is provided at the end of the column (51). The ball head slides in contact with the arc ring (55). The arc ring (55) has an undulating wave surface. The ball head slides in contact with the wave surface. When the arc ring (55) rotates, it drives the slide rod (52) to move back and forth through the ball head.
7. The environmentally friendly color printing paper box production equipment according to claim 6, characterized in that: The bottom of the rotating shaft (53) is connected to a gear (57), and the inner wall of the long groove of the groove cylinder (45) is connected to multiple racks (58). The gears (57) at the bottom of the multiple rotating shafts (53) respectively mesh with the multiple racks (58).
8. The environmentally friendly color printing paper box production equipment according to claim 5, characterized in that: The spraying assembly (4) also includes a liquid level indicator mechanism (6), which includes a float (62). A smooth rod (61) is installed inside the tank (45). The float (62) is slidably sleeved on the smooth rod (61). A slide (64) is slidably connected to the inner wall of the fixed tube (43). A connecting rod (63) is hinged to one end of the slide (64). The end of the connecting rod (63) away from the slide (64) is hinged to the float (62). When the float (62) moves upward, the connecting rod (63) can drive the slide (64) to push away from the smooth rod (61).
9. The environmentally friendly color printing paper box production equipment according to claim 8, characterized in that: An observation window is provided on the part of the fixed tube (43) near the first support (2). A scale plate (65) is connected to the fixed tube (43). The scale plate (65) is located next to the observation window. The slide (64) is provided with a sliding ring. The sliding range of the sliding ring is located inside the observation window.
10. The environmentally friendly color printing paper box production equipment according to claim 2, characterized in that: A second motor (8) is installed on the frame (1). The second motor (8) has two output ends, which are respectively connected to two coating rollers (7).