A packaging printing device with printing roller alternation function

Abstract

The present invention relates to the technical field of printing equipment, and in particular to a packaging printing device with a printing roller alternating function. It comprises a fixed frame, the fixed frame is provided with an electric impression roller, the fixed frame is provided with symmetrically distributed electric slide rails, the electric sliders on the symmetrically distributed electric slide rails on the fixed frame are jointly fixedly connected to an ink storage frame, the ink storage frame is fixedly connected to ink cartridges evenly distributed, the inner side of the fixed frame is rotatably connected to a symmetrically distributed rotating frame, and the symmetrically distributed rotating frames are rotatably connected to a first printing roller and a second printing roller. According to the present invention, after the first printing roller has been used for a period of time, the first printing roller and the second printing roller are driven to rotate by the rotating frame on the front side, and the positions of the first printing roller and the second printing roller are exchanged, thereby reducing the use frequency of a single printing roller and extending the service life of the printing roller. At the same time, when the first printing roller is suddenly damaged, the second printing roller is used to continue printing, thereby improving production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of printing equipment, and in particular to a packaging printing device with a printing roller alternating function. Background Art

[0002] When printing on packaging bags, the printing roller needs to rotate continuously to adhere ink and print. In the process of printing patterns on the surface of the packaging bags, the printing roller rotates continuously, and friction and heat are generated during rotation, causing the temperature of the printing roller to rise. If there are urgent orders that require continuous and uninterrupted printing on the packaging bags, the printing roller is used intensively, and the temperature of the printing roller will rise, which is easy to cause metal fatigue. The printing roller is easily damaged, affecting the printing quality and reducing the service life of the device. At the same time, the increase in the temperature of the printing roller will accelerate the evaporation of the solvent in the ink, causing the ink to become viscous and the printing to be unclear.

[0003] If the printing roller is damaged during use, it is necessary to replace the printing roller. The process of replacing the printing roller will seriously affect the printing progress and reduce production efficiency. Summary of the invention

[0004] In order to overcome the disadvantages that a printing roller is easily damaged during high-intensity use and replacement of the printing roller after the printing roller is damaged affects the printing progress, the present invention provides a packaging printing device with a printing roller alternating function.

[0005] The technical solution is: a packaging printing device with a printing roller alternating function, comprising a fixed frame, the fixed frame is provided with an electric impression roller, the fixed frame is provided with symmetrically distributed electric slide rails, the electric sliders on the symmetrically distributed electric slide rails on the fixed frame are commonly fixedly connected to an ink storage frame, the ink storage frame is fixedly connected to uniformly distributed ink cartridges, the uniformly distributed ink cartridges are connected to each other, the fixed frame is fixedly connected to a first motor, the inner side of the fixed frame is rotatably connected to a symmetrically distributed rotating frame, the output shaft of the first motor is fixedly connected to the adjacent rotating frame, the symmetrically distributed rotating frames are rotatably connected to a first printing roller and a second printing roller, the first printing roller and the second printing roller are located below the electric impression roller, the fixed frame is fixedly connected to a second motor, the output shaft of the second motor is matched with the first printing roller or the second printing roller through a gear set transmission, the middle part of the fixed frame is fixedly connected to an ink scraper, the ink scraper is in contact with the first printing roller or the second printing roller, and a protective mechanism is provided on the side of the fixed frame away from the electric impression roller, the protective mechanism is used to protect the first printing roller or the second printing roller.

[0006] As a preferred embodiment, the protective mechanism includes an electric roller, which is rotatably connected to the side of the fixed frame away from the electric printing roller, and both ends of the electric roller are fixedly connected to a first gear, and the first gear is fixedly connected to an elastic rack through a square plate, and the square plate is located at the end of the elastic rack, and the elastic rack is meshed with the adjacent first gear, and a limiting rod is fixed between the symmetrically distributed elastic racks, and the limiting rod is located at one end of the adjacent elastic rack away from the square plate, and a rubber cover is fixedly connected between the symmetrically distributed elastic racks.

[0007] As a preferred embodiment, a mounting frame is fixedly connected to a side of the fixed frame close to the electric roller, the mounting frame is rotatably connected to a transmission gear, the first printing roller and the second printing roller are both fixedly connected to a second gear that cooperates with the transmission gear, the electric roller is fixedly connected to a third gear that meshes with the transmission gear, both ends of the first printing roller and the second printing roller are fixedly connected to transmission wheels, and the limit rod is limitedly cooperated with the adjacent transmission wheel.

[0008] As a preferred embodiment, it also includes a viscosity detection mechanism, which is respectively arranged in adjacent ink cartridges, and the viscosity detection mechanism is used to detect whether the ink is viscous. The viscosity detection mechanism includes a hydraulic push rod, which is fixed to the ink storage rack, and the telescopic end of the hydraulic push rod is fixed to a fixed rod, and the fixed rod is fixed to evenly distributed sliding parts, and the sliding parts are sealed and slidably connected to the adjacent ink cartridges, and the ink cartridges are fixed to a fixed plate, and the fixed plate is sealed and slidably connected to the adjacent sliding parts, and the bottom of the ink cartridge is fixed to a fixed block, and the fixed block is slidably connected to a sealing plate, and a first spring is fixed between the fixed block and the adjacent sealing plate, and a hole is opened in the lower part of the fixed plate, and the hole on the fixed plate is sealed and matched with the adjacent sealing plate, and a feeding component is provided on the fixed frame, and the feeding component is used to add solvent to the evenly distributed ink cartridges.

[0009] Preferably, the fixed plate is fixedly connected to a partition, and a gap is formed between a side of the partition away from the adjacent sliding member and the adjacent ink cartridge, and the partition divides the ink cartridge into two layers, the upper and lower layers being interconnected.

[0010] Preferably, a filter screen is provided on the hole at the bottom of the fixed plate, the sliding member is composed of a straight rod and a square block on the upper side of the straight rod, and a hole is opened on the square block, and a one-way valve is provided in the hole.

[0011] As a preferred embodiment, the feeding assembly includes a feeding box, the feeding box is fixedly connected to the fixed frame, the bottom of the feeding box is connected to a transmission pipe, the ink storage frame is fixedly connected to a transfer shell, the transmission pipe is connected to the transfer shell, the transfer shell is fixedly connected to and connected to evenly distributed rotating tubes, the lower side of the ink cartridge is sealed and slidably connected to a filter element, the filter element is connected to the adjacent rotating tube, the filter element is fixedly connected to and connected to a liquid outlet pipe, and a hole is opened on the liquid outlet pipe.

[0012] As a preference, the rotating tube is a hose, a rotating switch is fixedly connected to one side of the rotating tube close to the adjacent filter element, a gear ring is provided on the outer ring of the rotating switch, the ink cartridge is fixedly connected to a fixed rack meshing with the gear ring on the rotating switch, a second spring is fixedly connected between the filter element and the adjacent ink cartridge, a mixing mechanism is provided in the ink cartridge, and the mixing mechanism is used to accelerate the mixing of the solvent and the ink.

[0013] As a preferred embodiment, the mixing mechanism includes a fixed shell, which is fixedly connected to the adjacent lower layer of the ink cartridge, and the fixed shell is located on the side of the adjacent filter element away from the adjacent fixed plate. The fixed shell is fixedly connected to a first fixed tube, and the first fixed tube is rotatably connected to a rotating shaft through a square frame, and the rotating shaft is located at the central axis of the adjacent first fixed tube. Two groups of circumferentially distributed rotating blades are arranged on the rotating shaft, and a first stirring rod is fixedly connected to the side of the rotating shaft close to the adjacent filter element, and a circumferentially distributed second stirring rod is fixedly connected between the two groups of rotating blades.

[0014] Preferably, a liquid level sensor is fixedly connected to the upper side of one of the ink cartridges, a second fixed tube is fixedly connected to the lower side of the ink storage rack, the second fixed tube is connected to an external liquid pump, the second fixed tube is connected to the evenly distributed fixed shells through evenly distributed pipes, and a hole is opened on one side of the fixed shell close to the adjacent filter element.

[0015] Compared with the existing similar technologies, the present invention has at least the following advantages: after the first printing roller has been used for a period of time, the present invention drives the first printing roller and the second printing roller to rotate through the rotating frame on the front side, exchanges the positions of the first printing roller and the second printing roller, reduces the use frequency of a single printing roller, and extends the service life of the printing roller. At the same time, when the first printing roller is suddenly damaged, the second printing roller is used to continue printing, thereby improving production efficiency.

[0016] The present invention wraps the unused first printing roller or the unused second printing roller with a rubber cover to prevent the unused printing roller from being contaminated with dust, so that the first printing roller or the second printing roller can be directly replaced when alternating without cleaning the printing roller again.

[0017] The present invention allows the ink in the ink cartridge to flow continuously through the movement of a sliding part, and evenly distributes the dye in the ink. When the ink is viscous, a solvent is slowly added to the ink to prevent the ink from becoming viscous due to evaporation of the solvent. After the solvent is added, the mixed ink is stirred for the first time by rotating a first stirring rod, and then the ink is stirred for the second time by a second stirring rod, so that the ink and the solvent are fully mixed, and the stratification of the ink is prevented to affect the printing effect.

[0018] The present invention keeps sufficient ink by passing new ink through the hole on the fixed shell and then mixing it with old ink when the amount of ink in the ink cartridge decreases, and mixes the new ink with the old ink through the first stirring rod and the second stirring rod to prevent color and concentration deviation and affect the printing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 2 It is a three-dimensional structural schematic diagram of the fixing frame and the ink scraper of the present invention;

[0021] Figure 3 It is a three-dimensional structural schematic diagram of the protection mechanism of the present invention;

[0022] Figure 4 It is a three-dimensional structural schematic diagram of the mounting frame and the transmission gear of the present invention;

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the electric roller, the first gear and the elastic rack of the present invention;

[0024] Figure 6 It is a schematic diagram of the three-dimensional structure of the feed box and the transmission tube of the present invention;

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the transmission tube and the transfer shell of the present invention;

[0026] Figure 8 It is a three-dimensional structural schematic diagram of the viscosity detection mechanism of the present invention;

[0027] Fig. 9 It is a schematic diagram of the three-dimensional structure of the feeding assembly of the present invention;

[0028] Fig.10 It is a three-dimensional structural schematic diagram of the filter element, the liquid outlet pipe and the fixed shell of the present invention;

[0029] Fig.11 It is a schematic diagram of the three-dimensional structure of the fixed shell, the first fixed tube and the rotating shaft of the present invention.

[0030] The markings in the figure are: 1-fixed frame, 11-electric impression roller, 12-ink storage frame, 121-ink cartridge, 13-first motor, 14-rotating frame, 15-first printing roller, 16-second printing roller, 17-second motor, 18-ink scraper, 2-electric roller, 21-first gear, 22-elastic rack, 23-limiting rod, 24-rubber cover, 3-mounting frame, 31-transmission gear, 32-second gear, 33-third gear, 34-transmission wheel, 4-hydraulic push rod, 41-fixed Fixed rod, 42-sliding part, 43-fixed plate, 44-fixed block, 45-sealing plate, 46-first spring, 5-feeding box, 51-transmission tube, 52-transport shell, 53-rotating tube, 54-filter, 55-liquid outlet pipe, 56-rotating switch, 57-fixed rack, 58-second spring, 6-fixed shell, 61-first fixed tube, 62-rotating shaft, 63-rotating fan blade, 64-first stirring rod, 65-second stirring rod, 7-liquid level sensor, 71-second fixed tube. DETAILED DESCRIPTION

[0031] 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 described embodiments 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.

[0032] If the printing roller is damaged during use, it is necessary to replace the printing roller. The process of replacing the printing roller will seriously affect the printing progress and reduce the production efficiency. For this reason, the present invention is improved by the following steps:

[0033] Embodiment 1: A packaging printing device with a printing roller alternating function, referring to Figure 1-Figure 3As shown, it includes a fixed frame 1, the fixed frame 1 is provided with an electric impression roller 11, the fixed frame 1 is provided with two electric slide rails symmetrically distributed front and back, the electric sliders on the two electric slide rails symmetrically distributed on the fixed frame 1 are commonly fixedly connected to an ink storage frame 12, the ink storage frame 12 is fixedly connected to evenly distributed ink cartridges 121, the evenly distributed ink cartridges 121 are connected to each other, the evenly distributed ink cartridges 121 and the ink storage frame 12 together form a rectangular cavity, a first motor 13 is fixedly connected to the front side of the fixed frame 1, two rotating frames symmetrically distributed front and back are rotatably connected to the inner side of the fixed frame 1, the output shaft of the first motor 13 is fixedly connected to the adjacent rotating frames 14, the rotating frames 14 are symmetrical in the center as a whole, the output shaft of the first motor 13 is located at the center point of the adjacent rotating frames 14, the symmetrically distributed rotating frames 14 are rotatably connected to the first printing roller 15 and the second printing roller 16, the first printing roller 15 and the second printing roller The surfaces of 16 are both provided with recessed patterns for printing. The first printing roller 15 and the second printing roller 16 are located below the electric impression roller 11. A second motor 17 is fixedly connected to the front side of the fixed frame 1. The output shaft of the second motor 17 is matched with the first printing roller 15 or the second printing roller 16 through a gear set transmission. A scraper 18 is fixedly connected to the middle of the fixed frame 1. The scraper 18 is used to scrape off excess ink from the first printing roller 15 and the second printing roller 16. The right side of the scraper 18 is located above the ink storage frame 12 and the evenly distributed ink cartridges 121. The scraper 18 is in contact with the first printing roller 15 or the second printing roller 16. A protective mechanism is provided on the right side of the fixed frame 1. The protective mechanism is used to protect the first printing roller 15 or the second printing roller 16, and prevent dust from adhering to the first printing roller 15 or the second printing roller 16, so as to keep the first printing roller 15 or the second printing roller 16 clean.

[0034] Reference Figure 3-Figure 5 As shown, the protective mechanism includes an electric roller 2, which is rotatably connected to the right side of the fixed frame 1. The front and rear ends of the electric roller 2 are fixedly connected with a first gear 21. The first gear 21 is fixedly connected with an elastic rack 22 through a square plate. The elastic rack 22 consists of an elastic plate and equidistantly distributed teeth. The elastic rack 22 is initially in a bent state and has a tendency to continue bending. The square plate is located at the lower end of the elastic rack 22. The elastic rack 22 is meshed with the adjacent first gear 21. A limiting rod 23 is fixedly connected between the upper end points of the two elastic racks 22 symmetrically distributed front and back, and a rubber cover 24 is fixedly connected between the two elastic racks 22 symmetrically distributed front and back. The rubber cover 24 is made of a soft material and can be bent and deformed at will.

[0035] Reference Figure 4As shown, a mounting frame 3 is fixedly connected to the right side of the fixing frame 1, and the mounting frame 3 is rotatably connected to a transmission gear 31, and the transmission gear 31 is used to transmit rotational force. The rear sides of the first printing roller 15 and the second printing roller 16 are fixedly connected with a second gear 32 that is transmission-matched with the transmission gear 31, and the rear side of the electric roller 2 is fixedly connected with a third gear 33 that is meshed with the transmission gear 31. When in use, the third gear 33 is driven to rotate by the electric roller 2, and the third gear 33 drives the adjacent second gear 32 to rotate through the transmission gear 31, so that the electric roller 2 and the adjacent first printing roller 15 or second printing roller 16 rotate in the same direction through transmission, and the front and rear ends of the first printing roller 15 and the second printing roller 16 are fixedly connected with a transmission wheel 34, and the limiting rod 23 is limitedly matched with the adjacent transmission wheel 34, and the transmission wheel 34 is provided with circumferentially distributed grooves. When the first gear 21 rotates, the limiting rod 23 gradually contacts with the transmission wheel 34 and enters into the groove on the transmission wheel 34, and drives the limiting rod 23 to move through the groove.

[0036] When the device is used to print packaging bags, ink is first added to the ink cartridges 121 that are evenly distributed, and the packaging bags to be printed are passed between the electric impression roller 11 and the first printing roller 15. Then, the electric impression roller 11 and the second motor 17 are started, and the output shaft of the second motor 17 drives the first printing roller 15 to rotate through the gear set. The first printing roller 15 rotates clockwise from front to back, and the electric impression roller 11 rotates counterclockwise. The lower side of the first printing roller 15 is located in the ink, and the first printing roller 15 has a recessed pattern for printing. During the rotation of the first printing roller 15, ink is picked up and then the ink is driven to rotate clockwise. When the picked up ink passes through the scraper 18, the scraper 18 scrapes off excess ink, leaving only the ink on the pattern, and then continues to rotate. The required pattern or text is printed on the packaging bag through the extrusion of the electric impression roller 11, completing the entire printing process.

[0037] When printing packaging bags for a long time, the first printing roller 15 rotates continuously and generates heat through friction. The heat generated by the first printing roller 15 accelerates the evaporation of the solvent in the ink cartridge 121, causing the ink to become viscous. Meanwhile, the continuous use of the first printing roller 15 causes fatigue of the first printing roller 15, reducing the service life of the first printing roller 15. Therefore, it needs to be replaced after a period of use. When it is necessary to switch the printing roller, the two electric slide rails on the fixed frame 1 are started, and the electric sliders on the two electric slide rails jointly drive the ink storage frame 121 to move from the fixed frame 1 to the ink cartridge 121. Figure 1The position shown moves downward and stops when the ink storage rack 12 descends to the bottom surface of the fixed rack 1, so that the first printing roller 15 cannot stick to the ink. Then the first printing roller 15 continues to rotate until the ink-carrying part of the first printing roller 15 contacts the packaging bag, reducing the ink remaining on the first printing roller 15. Then the electric impression roller 11 and the second motor 17 are turned off. At this time, the first motor 13 is started, and the output shaft of the first motor 13 drives the rotating rack 14 on the front side to rotate clockwise. The rotating rack 14 on the front side drives the first printing roller 15 and the second printing roller 16 to rotate, and the positions of the first printing roller 15 and the second printing roller 16 are interchanged, thereby completing the switching of the printing rollers. Then the electric impression roller 11 and the second motor 17 are started again, and the ink storage rack 12 is reset. At this time, printing is performed by the second printing roller 16 and the electric impression roller 11. The use frequency of a single printing roller is reduced by switching the printing rollers, and the service life of the printing rollers is extended. When a printing roller is damaged, the damaged printing roller can be replaced in time to ensure normal printing and improve production efficiency.

[0038] After the first printing roller 15 rotates to the outside of the ink cartridge 121 and stops, the first printing roller 15 approaches the electric roller 2, and then the electric roller 2 is started, the electric roller 2 rotates counterclockwise, the electric roller 2 drives the transmission gear 31 to rotate clockwise through the third gear 33, the transmission gear 31 drives the second gear 32 on the first printing roller 15 to rotate counterclockwise, the second gear 32 drives the first printing roller 15 to rotate, so that the electric roller 2 and the first printing roller 15 rotate counterclockwise at the same time, and when the electric roller 2 rotates, it drives the first gear 21 to rotate, the first gear 21 drives the elastic rack 22 to rotate, the elastic rack 22 drives the limit rod 23 to move, so that the limit rod 23 gradually contacts the transmission wheel 34 on the first printing roller 15, the groove on the transmission wheel 34 drives the limit rod 23 to rotate around the transmission wheel 34, and the elastic rack 22 is deformed, and the two front-to-back symmetrical elastic racks 22 drive the rubber cover 24 to move, and the rubber cover 24 gradually covers the first printing roller 15. When the limit rod 23 bypasses the first printing roller 15 and is located at the lower side of the first printing roller 15, it stops, and the electric roller 2 is closed. At this time, the first printing roller 15 is covered by the rubber cover 24 to reduce the adhesion of dust. When the printing roller needs to be replaced again, the electric roller 2 is started in the reverse direction, and the electric roller 2 rotates clockwise. The first printing roller 15 and the transmission wheel 34 thereon rotate synchronously clockwise through transmission, and the electric roller 2 drives the first gear 21 to rotate. During the rotation of the first gear 21, the elastic rack 22 is gradually reset. When the elastic rack 22 is completely reset, the electric roller 2 is closed to keep the surface of the first printing roller 15 clean and can be directly replaced.

[0039] During the continuous printing process, the solvent in the ink will gradually evaporate over time, thereby changing the viscosity of the ink and increasing the viscosity of the ink. When the viscosity of the ink is too high, the fluidity of the ink becomes poor, and it is not easy to print from the printing roller to the packaging bag, which can easily lead to problems such as uneven ink, ink shortage, white spots, etc., reducing the printing quality.

[0040] Example 2: Based on Example 1, refer to Figure 7-Figure 9 As shown, it also includes a viscosity detection mechanism, which is respectively arranged in adjacent ink cartridges 121. The viscosity detection mechanism is used to detect whether the ink is viscous. The viscosity detection mechanism includes a hydraulic push rod 4, which is fixedly connected to the left side of the ink storage rack 12. The telescopic end of the hydraulic push rod 4 is fixedly connected to a fixed rod 41, and the upper side of the fixed rod 41 is fixedly connected to evenly distributed sliding members 42. The sliding member 42 consists of a straight rod and a square block on the upper side of the straight rod, and a hole is opened on the square block. A one-way valve is arranged in the hole, and the liquid can only flow downward from the one-way valve. The sliding member 42 is sealed and slidably connected to the adjacent ink cartridges 121, and the fixed plate 43 is fixedly connected to a partition, and there is a gap between the side of the partition away from the adjacent sliding member 42 and the adjacent ink cartridge 121. The partition divides the ink cartridge 121 into an upper and lower layer, and the upper and lower layers are connected to each other. The ink in the upper layer of the ink cartridge 121 is in contact with the first printing roller. 15 or the second printing roller 16 contacts, the ink cartridge 121 is fixedly connected with a fixed plate 43, and the fixed plate 43 is sealed and slidably connected with the adjacent sliding member 42. When the sliding member 42 moves downward, the square block on the upper side of the sliding member 42 completely blocks the space between the left side of the fixed plate 43 and the ink cartridge 121, so that the ink can flow quantitatively. The bottom of the ink cartridge 121 is fixedly connected with a fixed block 44, and the fixed block 44 is slidably connected with a sealing plate 45. A first spring 46 is fixedly connected between the fixed block 44 and the adjacent sealing plate 45. The first spring 46 is used to drive the adjacent sealing plate 45 to reset. A hole is opened at the lower part of the fixed plate 43, and a filter screen is arranged on the hole at the lower part of the fixed plate 43 for filtering impurities in the ink. The hole on the fixed plate 43 is sealed and matched with the adjacent sealing plate 45. A feeding component is arranged on the fixed frame 1, and the feeding component is used to add solvent to the ink cartridge 121 evenly distributed.

[0041] Reference Figure 6-Figure 9As shown, the feeding assembly includes a feeding box 5, which is fixedly connected to the front side of the fixing frame 1, and is used to store solvents. The bottom of the feeding box 5 is connected to a transmission pipe 51, and the ink storage frame 12 is fixedly connected to a transfer shell 52. The transmission pipe 51 is connected to the transfer shell 52, and the transfer shell 52 is fixedly connected and connected to uniformly distributed rotating tubes 53. The rotating tube 53 is a hose, and the lower side of the ink cartridge 121 is sealed and slidably connected to a filter element 54, which consists of a square shell and a filter screen therein, and the filter element 54 is connected to the adjacent rotating tube 53, and the filter element 54 is fixedly connected and A liquid outlet pipe 55 is connected, and a hole is opened on the liquid outlet pipe 55 for adding solvent. A rotary switch 56 is fixedly connected to the upper side of the rotating tube 53. A gear ring is provided on the outer ring of the rotating switch 56. The rotation of the gear ring can control the size of the opening of the rotating switch 56. A fixed rack 57 meshing with the gear ring on the rotating switch 56 is fixedly connected to the ink cartridge 121. A second spring 58 is fixedly connected between the filter element 54 and the adjacent ink cartridge 121. The second spring 58 is used to drive the filter element 54 to reset. A mixing mechanism is provided in the ink cartridge 121, and the mixing mechanism is used to accelerate the mixing of the solvent and the ink.

[0042] Reference Figure 8 , Fig.10 and Fig.11 As shown, the mixing mechanism includes a fixed shell 6, which is fixedly connected to the lower layer of the adjacent ink cartridge 121. The fixed shell 6 is fixedly connected to a first fixed tube 61. The first fixed tube 61 is rotatably connected to a rotating shaft 62 through a square frame on the right side. The rotating shaft 62 is located at the central axis of the adjacent first fixed tube 61. Two groups of circumferentially distributed rotating blades 63 are arranged on the rotating shaft 62. When ink passes through, the ink drives the rotating blades 63 to rotate. A first stirring rod 64 is fixedly connected to the side of the rotating shaft 62 close to the adjacent filter element 54. The first stirring rod 64 consists of a cross rod and four round rods. A circumferentially distributed second stirring rod 65 is fixedly connected between the two groups of rotating blades 63. The second stirring rod 65 is used to stir the ink.

[0043] Reference Figure 8-Figure 10 As shown, a liquid level sensor 7 is fixedly connected to the upper side of the frontmost ink cartridge 121, and the liquid level sensor 7 is used to detect the height of the ink. A second fixed tube 71 is fixedly connected to the lower side of the ink storage rack 12, and the second fixed tube 71 is connected to an external liquid pump, and the liquid pump is used to extract new ink from the outside. The second fixed tube 71 is connected to the evenly distributed fixed shells 6 through evenly distributed pipes, and a hole is opened on the left side of the fixed shell 6 for adding ink to the ink cartridge 121.

[0044] In the process of using the device for printing, the hydraulic push rod 4 is started, and the telescopic end of the hydraulic push rod 4 drives the fixed rod 41 to move up and down reciprocatingly, and the fixed rod 41 drives the sliding member 42 to move up and down reciprocatingly. Taking a sliding member 42 as an example, during the downward movement of the sliding member 42, the square block on the upper side of the sliding member 42 gradually contacts the fixed plate 43, and the square block on the upper side of the sliding member 42 completely blocks the space between the left side of the fixed plate 43 and the ink cartridge 121. At this time, the sliding member 42 moves downward to squeeze the ink under its square block, and the ink squeezes the sealing plate 45 to the right, and the sealing plate 45 moves to the right. The opening on the fixed plate 43 is opened and the first spring 46 is squeezed. The ink moves to the right at the lower layer of the ink cartridge 121 through the fixed plate 43, and then moves to the upper layer of the ink cartridge 121 through the filter 54, the first fixed tube 61 and the gap on the right side of the ink cartridge 121. Then the sliding member 42 moves upward, and the sealing plate 45 is reset under the action of the first spring 46. The ink moves to the lower side of the sliding member 42 through the one-way valve on the sliding member 42 and continues to move after being reset, so that the ink in the ink cartridge 121 forms a circulation, and the filter net on the fixed plate 43 filters some impurities in the ink.

[0045] When the ink passes through the first fixed tube 61 , the ink squeezes the rotating blade 63 , causing the rotating blade 63 to rotate, and at the same time drives the second stirring rod 65 and the rotating shaft 62 to rotate, and the rotating shaft 62 drives the first stirring rod 64 to rotate.

[0046] When the ink passes through the filter element 54, if the ink becomes viscous, the resistance of the ink passing through the filter element 54 becomes larger, and at the same time, the thrust to the right of the filter element 54 becomes larger, and the ink overcomes the elastic force of the second spring 58 to drive the filter element 54 to move to the right. When the filter element 54 moves to the right, it drives the rotating tube 53 to move to the right, and the rotating switch 56 on the rotating tube 53 moves to the right. The gear ring on the rotating switch 56 moves to the right and rotates counterclockwise (from top to bottom) under the engagement of the fixed rack 57, so that the rotating switch 56 is gradually opened from the closed state (initially, the solvent is added to the feeding box 5). At this time, the solvent in the feeding box 5 moves to the transfer shell 52 through the transmission tube 51, and the transfer shell 52 moves to the filter element 54 through the rotating tube 53 and the rotating switch 56. The solvent in the filter element 54 is discharged through the hole on the liquid outlet pipe 55 to mix the solvent with the viscous ink.

[0047] After the above-mentioned solvent is mixed with the viscous ink, the mixed ink moves to the right, and at the same time, the first stirring rod 64 rotates to stir the mixed ink for the first time, and then the mixed ink passes through the rotating fan blade 63. When the mixed ink passes through the second stirring rod 65, the second stirring rod 65 rotates to stir the ink for the second time, so that the ink and the solvent are fully mixed, so that the ink maintains a certain viscosity, and prevents the ink from affecting the printing effect due to the evaporation of the solvent therein.

[0048] When the amount of ink in the ink cartridge 121 decreases, the liquid level sensor 7 detects that the amount of ink in the ink cartridge 121 decreases, and then starts the external liquid pump to pass the ink into the second fixed tube 71. The ink entering the second fixed tube 71 enters the evenly distributed fixed shell 6 through the pipeline, and then is discharged from the holes on the fixed shell 6. Then the ink enters the first fixed tube 61, and the new ink and the old ink are mixed through the first stirring rod 64 and the second stirring rod 65 to prevent color and concentration deviations that affect the printing effect. When the ink amount is restored, the liquid level sensor 7 controls the liquid pump to close and stop adding ink.

[0049] Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation shall fall within the protection scope of the present invention.

Claims

1. A packaging printing device with a printing roller alternating function, comprising a fixed frame (1), the fixed frame (1) being provided with an electric impression roller (11), the fixed frame (1) being provided with symmetrically distributed electric slide rails, the electric slide blocks on the symmetrically distributed electric slide rails on the fixed frame (1) being commonly fixedly connected to an ink storage frame (12), the ink storage frame (12) being fixedly connected to uniformly distributed ink cartridges (121), the uniformly distributed ink cartridges (121) being connected to each other, the fixed frame (1) being fixedly connected to a first motor (13), characterized in that: The invention also comprises symmetrically distributed rotating frames (14), wherein the symmetrically distributed rotating frames (14) are all rotatably connected to the inner side of the fixed frame (1), the output shaft of the first motor (13) is fixedly connected to the adjacent rotating frames (14), a first printing roller (15) and a second printing roller (16) are rotatably connected between the symmetrically distributed rotating frames (14), the first printing roller (15) and the second printing roller (16) are located below the electric impression roller (11), and the fixed frame (1) is fixedly connected to the second motor (17). ), the output shaft of the second motor (17) is in transmission cooperation with the first printing roller (15) or the second printing roller (16) through a gear set, a scraper (18) is fixedly connected to the middle of the fixed frame (1), the scraper (18) is in contact cooperation with the first printing roller (15) or the second printing roller (16), and a protective mechanism is provided on the side of the fixed frame (1) away from the electric impression roller (11), and the protective mechanism is used to protect the first printing roller (15) or the second printing roller (16); The protection mechanism comprises an electric roller (2), the electric roller (2) being rotatably connected to a side of the fixed frame (1) away from the electric impression roller (11), both ends of the electric roller (2) being fixedly connected to a first gear (21), the first gear (21) being fixedly connected to an elastic rack (22) via a square plate, the square plate being located at the end of the elastic rack (22), the elastic rack (22) being meshed with an adjacent first gear (21), a limiting rod (23) being fixedly connected between the symmetrically distributed elastic racks (22), the limiting rod (23) being located at an end of the adjacent elastic racks (22) away from the square plate, and a rubber cover (24) being fixedly connected between the symmetrically distributed elastic racks (22); The ink cartridge (121) further comprises a viscosity detection mechanism, wherein the viscosity detection mechanism is respectively arranged in adjacent ink cartridges (121), and the viscosity detection mechanism is used to detect whether the ink is viscous, and the viscosity detection mechanism comprises a hydraulic push rod (4), wherein the hydraulic push rod (4) is fixedly connected to the ink storage frame (12), and the telescopic end of the hydraulic push rod (4) is fixedly connected to a fixed rod (41), and the fixed rod (41) is fixedly connected to evenly distributed sliding members (42), and the sliding member (42) is sealed and slidably connected to the adjacent ink cartridge (121), and the ink cartridge (121) is fixedly connected to a fixed plate (43), and the fixed plate (43) is fixedly connected to the fixed plate (43). The fixed plate (43) is sealingly and slidably connected to the adjacent sliding member (42); a fixed block (44) is fixedly connected to the bottom of the ink cartridge (121); a sealing plate (45) is slidably connected to the fixed block (44); a first spring (46) is fixedly connected between the fixed block (44) and the adjacent sealing plate (45); a hole is opened at the bottom of the fixed plate (43); the hole on the fixed plate (43) is sealingly matched with the adjacent sealing plate (45); a feeding assembly is arranged on the fixed frame (1); the feeding assembly is used to add solvent to the uniformly distributed ink cartridge (121).

2. A packaging printing device with a printing roller alternation function according to claim 1, characterized in that: A mounting frame (3) is fixedly connected to a side of the fixed frame (1) close to the electric roller (2); the mounting frame (3) is rotatably connected to a transmission gear (31); the first printing roller (15) and the second printing roller (16) are both fixedly connected to a second gear (32) that is transmission-matched with the transmission gear (31); the electric roller (2) is fixedly connected to a third gear (33) that meshes with the transmission gear (31); both ends of the first printing roller (15) and the second printing roller (16) are fixedly connected to transmission wheels (34); and the limiting rod (23) is limit-matched with an adjacent transmission wheel (34).

3. A packaging printing device with a printing roller alternation function according to claim 1, characterized in that: The fixed plate (43) is fixedly connected to a partition plate, and a gap is formed between a side of the partition plate away from the adjacent sliding member (42) and the adjacent ink cartridge (121), and the partition plate divides the ink cartridge (121) into two layers, the upper and lower layers being connected to each other.

4. A packaging printing device with a printing roller alternation function according to claim 3, characterized in that: A filter screen is arranged on the hole at the bottom of the fixed plate (43), and the sliding member (42) is composed of a straight rod and a square block on the upper side of the straight rod, and a hole is opened on the square block, and a one-way valve is arranged in the hole.

5. A packaging printing device with a printing roller alternation function according to claim 3, characterized in that: The feeding assembly comprises a feeding box (5), the feeding box (5) is fixedly connected to the fixed frame (1), the bottom of the feeding box (5) is connected to a transmission tube (51), the ink storage frame (12) is fixedly connected to a transfer shell (52), the transmission tube (51) is connected to the transfer shell (52), the transfer shell (52) is fixedly connected to and connected to uniformly distributed rotating tubes (53), the lower side of the ink box (121) is sealed and slidably connected to a filter element (54), the filter element (54) is connected to the adjacent rotating tube (53), the filter element (54) is fixedly connected to and connected to a liquid outlet pipe (55), and a hole is opened on the liquid outlet pipe (55).

6. A packaging printing device with a printing roller alternation function according to claim 5, characterized in that: The rotating tube (53) is a hose. A rotating switch (56) is fixedly connected to a side of the rotating tube (53) close to the adjacent filter element (54). A gear ring is provided on the outer ring of the rotating switch (56). The ink cartridge (121) is fixedly connected to a fixed rack (57) meshing with the gear ring on the rotating switch (56). A second spring (58) is fixedly connected between the filter element (54) and the adjacent ink cartridge (121). A mixing mechanism is provided inside the ink cartridge (121). The mixing mechanism is used to accelerate the mixing of the solvent and the ink.

7. A packaging printing device with a printing roller alternation function according to claim 6, characterized in that: The mixing mechanism comprises a fixed shell (6), the fixed shell (6) being fixedly connected to the lower layer of the adjacent ink cartridge (121), the fixed shell (6) being located on a side of the adjacent filter element (54) away from the adjacent fixed plate (43), the fixed shell (6) being fixedly connected to a first fixed tube (61), the first fixed tube (61) being rotatably connected to a rotating shaft (62) via a square frame, the rotating shaft (62) being located at the central axis of the adjacent first fixed tube (61), two groups of circumferentially distributed rotating blades (63) being arranged on the rotating shaft (62), a first stirring rod (64) being fixedly connected to a side of the rotating shaft (62) close to the adjacent filter element (54), and a circumferentially distributed second stirring rod (65) being fixedly connected between the two groups of rotating blades (63).

8. A packaging printing device with a printing roller alternation function according to claim 7, characterized in that: A liquid level sensor (7) is fixedly connected to the upper side of one of the ink cartridges (121), and a second fixed tube (71) is fixedly connected to the lower side of the ink storage rack (12). The second fixed tube (71) is connected to an external liquid pump. The second fixed tube (71) is connected to the evenly distributed fixed shells (6) through evenly distributed pipes. A hole is formed on one side of the fixed shell (6) close to the adjacent filter element (54).

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