A printing machine ink supply device

Abstract

The application discloses a printing machine ink supply device and relates to the technical field of ink supply of printing equipment. The printing machine ink supply device comprises an ink groove for storing and supplying ink, a gravure cylinder rotatably connected to the top of the ink groove, a doctor blade arranged at the top of one side of the ink groove and used for scraping off the ink on the outer wall of the gravure cylinder, a feeding pipe fixedly installed on the other side of the ink groove and used for feeding, and the top of the feeding pipe is communicated with the ink groove, and a platen roller is arranged above the gravure cylinder and used for extruding. The printing machine ink supply device adopts a double temperature control mode of water circulation constant temperature heat exchange and pipeline secondary auxiliary heating, and the problems of ink solidification, abnormal viscosity, and large temperature difference between the ink in the pipeline and the ink in the ink groove in a low temperature environment are solved. The heat conduction plate attached to the inner wall of the ink groove can quickly conduct heat, the water tank on the outer wall realizes circulation heat exchange of the heat conduction water solution through the upper and lower water joints, and the heat conduction fins with the communication holes in the inner wall of the water tank eliminate the heat exchange dead angle and realize the overall constant temperature regulation and control of the ink in the ink groove.

Description

Technical Field

[0001] This invention belongs to the field of ink supply technology for printing equipment, and in particular relates to an ink supply device for a printing press. Background Technology

[0002] Printing presses are core production equipment in industries such as packaging printing, book and magazine printing, and advertising printing. As a key component of printing presses, the ink supply system directly determines the color uniformity and image clarity of the printed products through its stability, uniformity, and cleanliness. It is a core element in controlling printing quality.

[0003] The existing technology has the following problems: Traditional equipment often employs a single, localized heating mode, simply heating the ink inside the ink tank without addressing the temperature control of the ink circulating in the pipeline. In low-temperature workshops or during winter, the ink's molecular activity decreases, easily leading to excessively high overall viscosity and significantly reduced fluidity. This can cause malfunctions such as ink supply blockage and intermittent ink delivery. Furthermore, the traditional single-heating structure only raises and maintains the temperature of the ink inside the ink tank, leaving the circulating pipeline uncontrolled. This results in a significant localized temperature difference between the ink inside the tank and the circulating ink, causing variations and imbalances in ink temperature and viscosity parameters throughout the entire ink supply system. These temperature and viscosity differences directly lead to inconsistent ink delivery resistance and unstable ink output, drastically reducing the uniformity and stability of the closed-loop ink circulation. Ultimately, this causes continuous fluctuations in ink thickness on the gravure cylinder surface, resulting in persistent quality defects in the printed product, such as color variations, uneven coating thickness, and inconsistent image saturation. This makes it completely unsuitable for the continuous, high-precision, and highly consistent temperature-controlled ink supply requirements of automated printing lines. Summary of the Invention

[0004] The purpose of this invention is to provide an ink supply device for a printing press to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to an ink supply device for a printing press, comprising an ink tank for storing and supplying ink, a gravure cylinder rotatably connected to the top of the ink tank, a doctor blade for scraping ink off the outer wall of the gravure cylinder being provided on the top of one side of the ink tank, a feeding pipe for feeding ink being fixedly installed on the other side of the ink tank, and the top of the feeding pipe being connected to the ink tank, an impression cylinder for pressing being provided directly above the gravure cylinder, a shaft being fixedly connected to both ends of the gravure cylinder, a transmission assembly and a transmission swing assembly being drivenly connected to the outer wall of one of the shafts, a scraper assembly rotatably connected to the inner cavity of the gravure cylinder and drivenly connected to the transmission swing assembly, a filter assembly connected to the bottom of the ink tank and communicating with the bottom of the feeding pipe being connected to the bottom of the ink tank, and a heating assembly for heating the ink being provided on the ink tank; The heating assembly includes a heat-conducting plate that fits against the inner wall of the ink tank. A water tank is fixedly connected to the bottom of the outer wall of the ink tank. Water inlets for water inlet and outlet are installed at the top and bottom of the water tank. The top of the filter assembly is provided with a shaft rod that is driven by a transmission assembly. The inner cavity of the water tank is filled with a heat-conducting solution.

[0006] Preferably, the scraper assembly includes a lever arm rotatably connected to the top of both ends of the ink tank, and the lever arm is drivenly connected to the transmission swing assembly. The bottom of the lever arm is fixedly connected to a scraper that fits against the inner wall of the ink tank, and the outer side of the scraper is fixedly installed with a heat-conducting plate. The scraper is driven by the transmission swing assembly to realize the scraper swinging in the inner cavity of the ink tank.

[0007] Preferably, a number of shovels are fixedly connected to both sides of the scraper, and the two sets of shovels are arranged alternately, with a number of filter holes provided on both sets of shovels.

[0008] Preferably, the scraper has a through-hole material gathering groove in the middle, and the material gathering groove is elliptical.

[0009] Preferably, the filter assembly includes a diversion pipe fixedly connected to the middle of the lower part of the ink tank, both ends of the outer wall of the diversion pipe are fixedly connected to guide pipes, the bottom of the two guide pipes are fixedly connected to a flow collection chamber, and the middle of the flow collection chamber is fixedly connected to a collection chamber connected to the feed pipe. The ink tank, the diverter pipe, the guide pipe, the flow collection chamber, the flow gathering chamber, and the feeding pipe are connected in sequence. The inner cavity of the diverter is rotatably connected to a helical rod that is driven by a transmission assembly. The inner side of the flow-gathering chamber is fixedly equipped with four filter screens arranged in a ring, and the filter screens are located at the connection between the flow-gathering chamber and the flow-collecting chamber.

[0010] Preferably, two valve plates are provided in the inner cavity of the flow-gathering chamber, and an adjusting plate one and an adjusting plate two are rotatably connected to the inner and outer sides of the top of the flow-gathering chamber, respectively. The tops of the two valve plates are fixedly installed to the bottoms of the adjusting plate one and the adjusting plate two, respectively. The outer side of the bottom of the first adjustment disk is rotatably connected to the inner side of the bottom of the second adjustment disk. The outer side of the top of the first adjustment disk and the top of the second adjustment disk are rotatably connected to a connecting frame. The bottom of the connecting frame is rotatably connected to a gear set. The outer side of the gear set meshes with the bottom of the outer side of the first adjustment disk and the bottom of the inner side of the second adjustment disk. Two one-way valves are fixedly installed on the outer wall of the collection chamber, and the two one-way valves are fixedly installed with two filter screens away from the guide pipe.

[0011] Preferably, the bottom of the flow collection chamber has two discharge ports corresponding to the positions of the one-way valves. A valve disc is rotatably connected to the bottom of the flow collection chamber. The valve disc has a through-feed port. A collection box connected to the feed port is detachably connected to the bottom of the valve disc. The discharge port is adapted to the feed port.

[0012] Preferably, the top of both ends of the ink trough is rotatably connected to a protective isolation cover that is rotatably connected to the outer wall of the shaft, and the protective isolation cover is fixedly installed to the outer wall of the lever arm. A disc brake concave plate is movably sleeved on the outer wall of the shaft, and a disc brake convex plate is pressed onto the inner wall of the disc brake concave plate and fixedly connected to the top of the lever arm. A heat-conducting plate is fixedly installed on the side of the disc brake convex plate away from the disc brake concave plate and fixedly installed to the lever arm. The bottom of the heat-conducting plate is fixedly connected to the end of the heat-conducting plate. The outer wall of the shaft is provided with a sliding groove, and the inner wall of the shaft is movably sleeved with a sliding sleeve that is slidably connected to the sliding groove. The outer wall of the sliding sleeve is fixedly connected to the inner wall of the disc brake concave plate, and the inner wall of the sliding sleeve is provided with a spring that is connected to the end of the concave roller.

[0013] Preferably, the two ends of the second shaft are fixedly installed to the inner wall of the spiral rod, a number of connecting columns are fixedly connected to the outer wall of the second shaft, and the inner wall of the spiral rod is filled with sand and gravel, with the amount of sand and gravel being 20%-30% of the inner cavity capacity of the spiral rod.

[0014] Preferably, the spiral rod is located at the bottom of the inner cavity of the water tank, and a number of heat-conducting plates are fixedly connected to the inner wall of the water tank, with through holes on the heat-conducting plates.

[0015] The present invention has the following beneficial effects: 1. This invention features a dedicated scraper assembly. Driven by a transmission swing component, the scraper periodically oscillates within the ink tank. The scraper closely adheres to the inner wall of the ink tank, thoroughly removing dried ink and sedimented ink layers, preventing long-term ink buildup and deterioration, and ensuring the cleanliness of the ink tank. Simultaneously, the staggered spades on both sides of the scraper agitate the ink in all directions, effectively breaking down ink stratification and uneven concentration. The elliptical material collection groove in the center of the scraper creates a precise collection and guidance effect, concentrating fine impurities and ink residue into the bottom filtration area. Furthermore, the oscillation process drives localized ink circulation, further enhancing ink mixing and ensuring uniform ink concentration and viscosity throughout the process. Combined with the top doctor blade for uniform ink removal and control of the gravure cylinder surface, this invention addresses the problems of poor ink homogenization, uneven printing thickness, and numerous finished product defects found in traditional ink supply equipment, making it suitable for high-precision, high-specification printing operations.

[0016] 2. This invention employs a dual temperature control mode of water circulation constant temperature heat exchange + secondary auxiliary heating in the pipeline, completely solving the problems of ink solidification, abnormal viscosity, and large temperature difference between the ink in the pipeline and the ink in the ink tank under low-temperature conditions. The heat-conducting plate attached to the inner wall of the ink tank can quickly conduct heat, and the water tank on the outer wall realizes heat exchange of the heat-conducting aqueous solution through upper and lower water connectors. With the heat-conducting plate with connecting holes on the inner wall of the water tank, heat exchange dead zones are eliminated, and the overall constant temperature control of the ink inside the ink tank is achieved.

[0017] 3. The transmission component of this invention drives the connecting column to rotate at high speed, creating continuous shearing and tumbling friction with the optimally proportioned (20%-30%) of sand and gravel inside the screw rod. This generates auxiliary heat, providing secondary heating to the ink in the circulation pipeline. This compensates for the lag and uneven temperature distribution inherent in single-tank heat exchange pipelines, ensuring uniform and constant ink temperature in the ink trough and the entire circulation pipeline. This guarantees ink flowability and effectively adapts to long-term, uninterrupted continuous printing operations. Furthermore, the optimized sand and gravel ratio does not occupy pipeline space and affect ink flow, while slightly agitating the ink to prevent deposition and clumping. It also balances the rotational inertia of the screw rod, improving material conveying stability.

[0018] 4. This invention utilizes a ring-shaped filter screen within the flow chamber to finely filter circulating ink, effectively intercepting small clumps and solid impurities in the ink. This improves ink purity from the source, preventing impurities from causing printing scratches and defects, and significantly increasing the yield rate of printed products. Simultaneously, the gear set meshing transmission controls the synchronous opening and closing of two sets of valve plates, allowing for precise adjustment of ink flow and velocity to adapt to different printing speeds, meeting the material supply needs of both high-speed and low-speed printing operations. When the valve plates close and compress, they break up intercepted impurity clumps and separate and recover the effective ink carried within the impurities. The separated clean ink is then returned for reuse via a one-way valve, significantly reducing material loss during the ink removal process and effectively saving production costs.

[0019] 5. This invention features a rotatable valve disc and a detachable collection box at the bottom of the flow chamber. Routine cleaning and maintenance of the equipment can be performed without stopping the machine or disassembling the entire structure. Operators simply rotate the valve disc to align the inlet and outlet, allowing impurities and residues intercepted by the filter to be collected in the collection box. After cleaning, resetting the valve disc quickly restores normal ink supply. This solves the problems of traditional ink supply equipment requiring machine shutdown and disassembly for cleaning impurities and maintaining the filter structure, resulting in cumbersome operation, time-consuming maintenance, and disruption to continuous production line operation. It improves equipment maintenance efficiency, ensures uninterrupted operation of the printing production line, and effectively increases overall production capacity.

[0020] 6. The protective isolation covers set at both ends of the ink trough of the present invention can move synchronously with the lever arm, fully covering the transmission and swing connection parts, effectively blocking ink splashing and dust intrusion, and preventing external impurities from mixing into the ink and affecting the printing quality.

[0021] 7. The core power source of this invention is the rotation of the gravure roller. The power is distributed in an integrated manner through the transmission component and the transmission swing component. It can provide power to all functional structures such as ink stirring, pipeline conveying, secondary heating, and flow regulation simultaneously. There is no need to add an additional independent drive device. The power transmission linkage is strong and the utilization rate is high, which effectively reduces the overall energy consumption and manufacturing cost of the equipment.

[0022] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments 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.

[0024] Figure 1 This is a schematic diagram of the printing press and ink supply structure of the present invention; Figure 2 This is a cross-sectional structural diagram of the printing press and ink supply of the present invention; Figure 3 This is a schematic diagram of the mating structure between the scraper assembly and the ink trough of the present invention; Figure 4 This is a schematic diagram of the driving structure of the scraper assembly of the present invention; Figure 5 This is a schematic diagram of the scraper assembly of the present invention; Figure 6 A schematic diagram of the ink supply circulation structure of the present invention; Figure 7This is a schematic diagram of the transmission structure of the ink of the present invention; Figure 8 This is a cross-sectional internal structural diagram of the flow-gathering chamber of the present invention; Figure 9 This is a schematic diagram of the mating structure between the flow chamber and the valve plate of the present invention; Figure 10 This is a cross-sectional structural schematic diagram of the frictional heat conduction of the present invention; Figure 11 This is a schematic diagram of the moving structure of the disc brake concave disc of the present invention; Figure 12 This is a cross-sectional internal structural diagram of the water tank of the present invention.

[0025] The attached diagram lists the components represented by each number as follows: 1. Impression cylinder; 2. Gravure cylinder; 21. Shaft 1; 22. Slide groove; 3. Doctor blade; 4. Ink trough; 5. Transmission assembly; 51. Transmission swing assembly; 6. Scraper assembly; 61. Lever arm; 62. Scraper; 63. Scraper plate; 64. Filter hole; 65. Material collection trough; 7. Heating assembly; 71. Water tank; 711. Heat-conducting plate; 712. Connecting hole; 713. Water connector; 72. Protective isolation cover; 721. Disc brake concave disc; 722. Disc brake convex disc; 723. Heat-conducting plate; 72 4. Sliding sleeve; 725. Spring; 73. Shaft II; 731. Connecting column; 74. Heat-conducting plate; 8. Filter assembly; 81. Diverter pipe; 811. Screw rod; 82. Guide pipe; 83. Concentrating chamber; 831. Discharge port; 84. Adjusting disc I; 841. Adjusting disc II; 842. Gear set; 843. Connecting frame; 844. Valve plate; 85. Collection box; 851. Valve disc; 852. Inlet; 86. Concentrating chamber; 861. Filter screen; 862. Check valve; 9. Feeding pipe. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0028] Please see Figure 1 and Figure 2 As shown, this invention is an ink supply device for a printing press, including an ink trough 4 for storing and supplying ink. A gravure cylinder 2 is rotatably connected to the top of the ink trough 4. A doctor blade 3 is provided on the top of one side of the ink trough 4 to scrape away excess ink from the outer wall of the gravure cylinder 2, ensuring uniform ink thickness on the surface of the gravure cylinder 2. A feeding pipe 9 is fixedly installed on the other side of the ink trough 4, with its top connected to the ink trough 4 to achieve internal ink circulation and replenish ink to the ink trough 4 for continuous feeding. An impression cylinder 1 is positioned directly above the gravure cylinder 2 for pressing. The printing operation on paper and other substrates is completed through the cooperation of the impression cylinder 1 and the gravure cylinder 2. Both ends of the gravure cylinder 2 are fixedly connected to... The top of both ends of the ink tank 4 are rotatably connected to shaft 21. One of the shafts 21 has a transmission assembly 5 and a transmission swing assembly 51 connected to its outer wall. By rotating the gravure cylinder 2, it provides power support for the overall operation of the device. Inside the gravure cylinder 2, a scraper assembly 6 is rotatably connected to the transmission swing assembly 51. The transmission swing assembly 51 drives the scraper assembly 6 to reciprocate inside the gravure cylinder 2. The bottom of the ink tank 4 is connected to a filter assembly 8 that communicates with the bottom of the feed pipe 9. This filter purifies the fed and circulated ink, removing impurities from the ink. The ink tank 4 is equipped with a heating assembly 7 for heating the ink. This keeps the ink inside the ink tank 4 at a constant temperature, preventing the ink from solidifying at low temperatures and becoming abnormally viscous, ensuring ink flowability, and adapting to the needs of continuous printing operations.

[0029] Please see Figure 7 and Figures 10-12 As shown, the heating component 7 includes a heat-conducting plate 74 that is attached to the inner wall of the ink tank 4 and contacts the ink inside the ink tank 4 to achieve efficient heat conduction; a water tank 71 is fixedly connected to the bottom of the outer wall of the ink tank 4, and water connectors 713 for water inlet and outlet are installed at the upper and lower positions of the water tank 71. The upper water connector 713 is used to connect the heating medium or replenish water, and the lower water connector 713 is used for drainage and circulating heat exchange, so as to realize the circulating heat exchange and constant temperature control of the heat-conducting solution inside the water tank 71; the top of the filter component 8 is provided with a shaft 73 that is driven by the transmission component 5, and the inner cavity of the water tank 71 is filled with heat-conducting solution. As the core medium storage structure for constant temperature heat exchange, the water tank 71 is filled with water as heat-conducting solution, and constant temperature heat exchange control is achieved by water circulation.

[0030] The top of both ends of the ink trough 4 are rotatably connected to a protective isolation cover 72 that is rotatably connected to the outer wall of the shaft 21. The protective isolation cover 72 is fixedly installed on the outer wall of the lever arm 61 and can move synchronously with the lever arm 61. It also serves to isolate and protect against dust and ink splashes. A disc brake concave plate 721 is movably sleeved on the outer wall of shaft 21. A disc brake convex plate 722, which is fixedly connected to the top of lever arm 61, is pressed onto the inner wall of disc brake concave plate 721 and can swing with lever arm 61. A heat conduction plate 723, which is fixedly installed on the side of disc brake convex plate 722 away from disc brake concave plate 721, is fixedly installed on lever arm 61. The bottom of heat conduction plate 723 is fixedly connected to the end of heat conduction plate 74, realizing the linkage between heat exchange structure and ink heating structure. The outer wall of shaft 21 is provided with a groove 22, and the inner wall of shaft 21 is movably sleeved with a sliding sleeve 724 that is slidably connected to the groove 22. The outer wall of the sliding sleeve 724 is fixedly connected to the inner wall of the disc brake concave plate 721, and the disc brake concave plate 721 can make limited sliding movements along the groove 22. The inner wall of the sliding sleeve 724 is provided with a spring 725 that is connected to the end of the concave roller 2. Through the elastic buffering effect of the spring 725, the vibration during the operation of the equipment can be effectively offset, ensuring the stability of the disc brake structure and the heat conduction structure, while improving the fit and sealing of the structure.

[0031] The two ends of shaft 73 are fixedly installed on the inner wall of screw rod 811. Shaft 73 and screw rod 811 rotate synchronously. Several connecting posts 731 are fixedly connected to the outer wall of shaft 73. The inner wall of screw rod 811 is filled with sand and gravel, and the amount of sand and gravel is 20%-30% of the inner cavity capacity of screw rod 811. This ratio is the optimal working ratio: the sand and gravel can form a slight disturbance with the low-speed rotation of screw rod 811, which can effectively prevent ink from depositing and clumping inside the pipe, while not occupying too much cavity space and affecting the normal flow of ink; and the sand and gravel can help balance the rotational inertia of screw rod 811, and improve the stability of ink flow adjustment and transportation. At the same time, shaft 73 drives connecting column 731 to rotate at high speed, forming a continuous shearing and tumbling friction with the sand and gravel inside the spiral rod 811, generating auxiliary heat to reheat the spiral rod 811 and the ink flowing inside. Combined with the heat exchange structure of water tank 71, the ink in the filter and circulation pipeline heats up faster and more evenly, completely solving the problem of uneven ink temperature and large differences in fluidity in some areas.

[0032] The spiral rod 811 is located at the bottom of the inner cavity of the water tank 71. Several heat-conducting plates 711 are fixedly connected to the inner wall of the water tank 71. The heat-conducting plates 711 are provided with through holes 712. The through holes 712 can ensure that the heat-conducting aqueous solution inside the water tank 71 flows in all directions, avoid local stagnation of aqueous solution and heat exchange dead zones, improve the overall heat exchange uniformity of the water tank 71, and ensure that the ink temperature in the ink tank 4 and pipeline is uniform.

[0033] Please see Figures 2-5As shown, the scraper assembly 6 includes a lever arm 61 rotatably connected to the top of both ends of the ink tank 4, and the lever arm 61 is connected to the transmission swing assembly 51 for power input; the bottom of the lever arm 61 is fixedly connected to a scraper 62 that fits against the inner wall of the ink tank 4, and the outer side of the scraper 62 is fixedly installed with the heat-conducting plate 74. The transmission swing assembly 51 drives the lever arm 61 and the scraper 62 to swing back and forth in the inner cavity of the ink tank 4. The scraper 62 can completely scrape off the precipitated ink and dried ink blocks adhering to the inner wall of the ink tank 4, completely avoiding long-term accumulation and deterioration of ink, and ensuring the cleanliness of the ink tank.

[0034] Several shovels 63 are fixedly connected to both sides of the scraper 62, and the two sets of shovels 63 are staggered. Several filter holes 64 are provided on both sets of shovels 63. During the reciprocating swing of the scraper 62, the staggered shovels 63 on both sides move synchronously, which can stir and disturb the ink inside the ink tank 4 in all directions, effectively preventing ink stratification, sedimentation and uneven concentration; at the same time, it can gather the suspended solid impurities and small clumps in the ink towards the middle of the ink tank 4, so that the impurities can quickly settle into the filter assembly 8 to complete the purification treatment.

[0035] A through-hole material collection groove 65 is provided in the middle of the scraper 62, and the material collection groove 65 is elliptical. The elliptical structure can enhance the central collection effect, further concentrating the precipitated impurities in the inner cavity of the ink tank 4 and the residue scraped off by the scraper to the discharge opening at the bottom of the ink tank 4, greatly improving the impurity collection efficiency. At the same time, the scraper can drive the ink to form a local circulation during the swinging process, further enhancing the ink mixing effect and ensuring that the ink concentration and viscosity are uniform throughout the process, making it suitable for high-precision printing operations.

[0036] During the oscillation of the scraper, the ink is gathered and forms a local ink circulation, which further improves the ink stirring and mixing effect, prevents ink stratification, and ensures that the ink concentration and viscosity are uniform.

[0037] Please see Figures 6-9 As shown, the filter assembly 8 includes a diversion pipe 81 fixedly connected to the middle of the lower part of the ink tank 4. Both ends of the outer wall of the diversion pipe 81 are fixedly connected to the guide pipes 82. The bottom of the two guide pipes 82 are fixedly connected to the flow collection chamber 83. The middle part of the flow collection chamber 83 is fixedly connected to the collection chamber 86 connected to the feed pipe 9. The ink tank 4, the diversion pipe 81, the guide pipe 82, the flow collection chamber 83, the collection chamber 86 and the feeding pipe 9 are connected in sequence to form a complete ink circulation channel, realizing the closed-loop circulation supply of ink. Inside the diversion pipe 81, a spiral rod 811 is rotatably connected via a transmission assembly 5. The transmission assembly 5 drives the shaft 73 to rotate, which in turn drives the spiral rod 811 to rotate. During the rotation of the spiral rod 811, on the one hand, it can force the ink in the pipeline to be transported and disturbed, thereby improving the ink flow efficiency and fluidity; on the other hand, in conjunction with the stirring and friction of the sand and gravel in the inner cavity, it can achieve auxiliary heating and flow stabilization effects, and prevent ink deposition and blockage in the pipeline. Four ring-shaped filter screens 861 are fixedly installed on the inner side of the flow collection chamber 83. The filter screens 861 are located at the connection between the flow collection chamber 83 and the flow gathering chamber 86. They can finely filter the circulating ink, effectively intercept small impurities and tiny clumps in the ink, ensure the purity of the ink that finally enters the feed pipe 9, and improve the quality of the printed product.

[0038] Two valve plates 844 are provided in the inner cavity of the flow collection chamber 83. Adjustment plate one 84 and adjustment plate two 841 are rotatably connected to the inner and outer sides of the top of the flow collection chamber 83, respectively. The tops of the two valve plates 844 are fixedly installed to the bottoms of adjustment plate one 84 and adjustment plate two 841, respectively. The outer side of the bottom of the first regulating disc 84 is rotatably connected to the inner side of the bottom of the second regulating disc 841. The outer side of the top of the first regulating disc 84 and the top of the second regulating disc 841 are rotatably connected to a connecting frame 843. The bottom of the connecting frame 843 is rotatably connected to a gear set 842. The outer side of the gear set 842 meshes with the bottom of the outer side of the first regulating disc 84 and the bottom of the inner side of the second regulating disc 841. Two one-way valves 862 are fixedly installed on the outer wall of the collection chamber 86, and the two one-way valves 862 are fixedly installed with two filter screens 861 away from the guide pipe 82. The one-way valves 862 can realize the one-way flow of ink, prevent the backflow of filtered clean ink, and avoid the purification ink from being mixed with impurities again.

[0039] The bottom of the flow collection chamber 83 has two discharge ports 831 corresponding to the positions of the one-way valve 862. A valve disc 851 is rotatably connected to the bottom of the flow collection chamber 83, and the valve disc 851 has a through-feed port 852. A collection box 85, communicating with the feed port 852, is detachably connected to the bottom of the valve disc 851. The discharge ports 831 and feed ports 852 are compatible. Without stopping the equipment, operators can rotate the valve disc 851 to align the feed port 852 with the discharge port 831, allowing impurities and residues intercepted and collected by the filter screen 861 to be guided into the collection box 85 for centralized collection. After cleaning the impurities, rotating the valve disc 851 closes the discharge port 831, and normal operation can be resumed. The detachable collection box 85 design allows for quick impurity cleaning and equipment maintenance without stopping the equipment or disassembling the entire machine, significantly improving equipment operation and maintenance efficiency and ensuring continuous production line operation.

[0040] Through the meshing transmission of gear set 842, regulating disc 1 84 and regulating disc 2 841 can be driven to rotate synchronously in opposite directions, thereby driving the two valve plates 844 to open and close synchronously. When the two valve plates 844 are far apart and open, the flow rate and velocity of ink inside the flow collection chamber 83 can be adjusted to meet the material supply requirements of different printing speeds; when the two valve plates 844 are close together and squeeze, the impurity clumps intercepted inside the flow collection chamber 83 can be squeezed and broken, and the effective ink encased in the impurities can be squeezed and separated. The separated ink flows back to the flow collection chamber 86 through one-way valve 862 for reuse, greatly reducing the loss in the ink removal process and lowering production costs.

[0041] Please see Figures 1-12 As shown, during operation, the gravure cylinder 2 is rotated via an external power transmission device, serving as the core power source for the entire system. Power is output through the transmission swing assembly 51, and also transmitted to the filter assembly 8, adjustment structure, and heating auxiliary structure via the transmission drive assembly 5. The gravure cylinder 2 is rotatably mounted on top of the ink trough 4 via shafts 21 at both ends. The impression cylinder 1 is positioned directly above the gravure cylinder 2. The printing substrate is fed between the two, and the printing process is completed through the pressing action of the impression cylinder 1 and the gravure cylinder 2. The ink trough 4 serves as the core structure for ink storage. One side is connected to the feeding pipe 9 for continuous replenishment and ink input, while the other side is equipped with a doctor blade 3, which can evenly scrape away excess ink adhering to the outer wall of the gravure cylinder 2, precisely controlling the ink thickness on the surface of the gravure cylinder 2 to ensure uniform printing thickness and consistent finished product quality.

[0042] In the ink mixing and purification process, the transmission swing assembly 51 drives the power arm 61 to swing back and forth, which in turn drives the scraper assembly 6, which is fixed to the power arm 61, to perform periodic reciprocating motion inside the ink tank 4. The scraper 62 closely adheres to the inner wall of the ink tank 4, which can thoroughly scrape off the dried ink and sedimented ink layers adhering to the inner wall of the ink tank 4, preventing the ink from accumulating and deteriorating over a long period of time, and ensuring the cleanliness of the ink tank 4. At the same time, the shovels 63, which are staggered on both sides of the scraper 62, swing synchronously with the scraper 62, and stir and agitate the ink inside the ink tank 4 in all directions, effectively breaking up ink stratification and sedimentation, and balancing the ink concentration and viscosity. The elliptical material gathering groove 65 set in the middle of the scraper 62 can form a collection and guiding effect, which can concentrate the fine impurities and scraped ink residue in the ink tank 4 to the bottom discharge position of the ink tank 4, and at the same time drive the ink to form a local circulation, further enhancing the ink mixing uniformity and providing a stable ink medium for high-precision printing.

[0043] In the ink constant temperature control operation, the device adopts a dual temperature control mode of water circulation constant temperature heat exchange + secondary auxiliary heating of pipeline. The heat-conducting plate 74 attached to the inner wall of the ink tank 4 can directly contact the internal ink to achieve rapid heat conduction. The water tank 71 at the bottom of the outer wall of the ink tank 4 is filled with heat-conducting aqueous solution. The upper and lower sets of water connectors 713 respectively complete the water replenishment, circulation heat exchange and drainage of the heating medium, so as to achieve constant temperature circulation of the aqueous solution inside the water tank 71. With the heat-conducting plates 711 evenly distributed on the inner wall of the water tank 71 and the through-hole 712, the aqueous solution is ensured to flow in all directions without dead corners, avoiding local heat exchange lag. The constant temperature heat is evenly transferred to the inside of the ink tank 4 through the heat-conducting plate 74, effectively preventing ink solidification and abnormal viscosity in low temperature environment, and continuously ensuring ink fluidity.

[0044] Simultaneously, under the transmission of the transmission assembly 5, shaft 73 drives the end connecting column 731 to rotate at high speed. The spiral rod 811 contains sand and gravel, filling 20%-30% of its cavity capacity. The sand and gravel create slight disturbances as the spiral rod 811 rotates at low speed. This not only prevents ink from depositing and clumping in the pipeline and balances the rotational inertia of the spiral rod 811, improving material conveying stability, but also creates continuous shearing and tumbling friction with the high-speed rotating connecting column 731, generating auxiliary heat to reheat the ink flowing in the pipeline. This secondary heating structure works in conjunction with the constant temperature heat exchange structure of the water tank 71 to solve the problems of large local temperature differences and inconsistent fluidity of the ink in the circulation pipeline and ink tank 4, achieving uniform and constant ink temperature throughout the entire passage.

[0045] Furthermore, the groove 22, sleeve 724, spring 725, disc brake convex plate 722, and disc brake concave plate 721 on the outer wall of shaft 21 form a shock-absorbing and sealing protective structure. During equipment operation, the sleeve 724 slides along the groove 22 in a limited manner, and in conjunction with the elastic buffering characteristics of the spring 725, it can effectively offset the vibration generated by the high-speed operation of the equipment, ensuring the operational stability and sealing performance of the heat conduction structure, transmission structure, and disc brake structure. At the same time, the protective isolation cover 72 completely covers the transmission and swing connection parts, which can effectively prevent ink splashing and dust intrusion, avoid impurities from mixing into the ink, protect the internal transmission structure, and extend the service life of the equipment.

[0046] In the closed-loop ink filtration and circulation process, the ink tank 4, the diversion pipe 81, the guide pipe 82, the convergence chamber 83, the collection chamber 86, and the feed pipe 9 are sequentially connected to form a complete closed-loop ink circulation channel. As the screw rod 811 rotates with the shaft 73, it forces the ink to flow directionally within the pipeline, improving ink circulation efficiency. When the ink flows through the connection between the convergence chamber 83 and the collection chamber 86, it undergoes fine filtration through the annularly arranged filter screen 861, effectively intercepting small clumps and solid impurities in the ink. The filtered clean ink flows unidirectionally through the one-way valve 862, preventing backflow and secondary contamination. Finally, it flows back into the ink tank 4 through the feed pipe 9, achieving ink recycling and continuous supply.

[0047] In the flow regulation and non-stop impurity cleaning process, the gear set 842 meshes and drives the regulating disc 1 84 and regulating disc 2 841 to rotate synchronously in opposite directions, causing the two sets of valve plates 844 to open and close synchronously. When the printing speed is high, the valve plates 844 open away from each other, expanding the ink flow cross-sectional area and increasing the ink flow rate and velocity to meet the feeding requirements of high-speed printing; when the printing speed is low, the valve plates 844 close appropriately to reduce the ink flow and ensure feeding accuracy. At the same time, during the closing and squeezing process of the valve plates 844, the impurity clumps intercepted by the filter screen 861 can be broken up, and the effective ink encased in the impurities can be squeezed and separated. The separated ink is returned for reuse through the one-way valve 862, which greatly reduces the loss in the ink removal process and saves production costs.

[0048] During routine maintenance and cleaning, there is no need to stop the machine or disassemble the entire structure. Operators only need to rotate the bottom valve disc 851 to align the inlet 852 on the valve disc 851 with the outlet 831 at the bottom of the flow chamber 83, allowing impurities and residues collected by the filter screen 861 to be guided into the removable collection box 85 for centralized collection. After cleaning, rotating the valve disc 851 in the opposite direction closes the outlet 831, quickly restoring normal ink supply to the equipment, improving maintenance efficiency, and ensuring continuous, uninterrupted operation of the printing production line.

[0049] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0050] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A printing press ink supply device, comprising an ink trough (4) for storing and supplying ink, wherein a gravure cylinder (2) is rotatably connected to the top of the ink trough (4), a doctor blade (3) for scraping ink off the outer wall of the gravure cylinder (2) is provided on the top of one side of the ink trough (4), a feeding pipe (9) for feeding is fixedly installed on the other side of the ink trough (4), and the top of the feeding pipe (9) is connected to the ink trough (4), an impression cylinder (1) for pressing is provided directly above the gravure cylinder (2), and a shaft (21) is fixedly connected to both ends of the gravure cylinder (2), wherein a transmission assembly (5) and a transmission swing assembly (51) are connected to the outer wall of one of the shafts (21), characterized in that: The inner cavity of the gravure roller (2) is rotatably connected to a scraper assembly (6) that is connected to the transmission swing assembly (51). The bottom of the ink tank (4) is connected to a filter assembly (8) that communicates with the bottom of the feed pipe (9). The ink tank (4) is provided with a heating assembly (7) for heating the ink. The heating assembly (7) includes a heat-conducting plate (74) that fits against the inner wall of the ink tank (4). A water tank (71) is fixedly connected to the bottom of the outer wall of the ink tank (4). Water connectors (713) for water inlet and outlet are installed at the top and bottom of the water tank (71). The top of the filter assembly (8) is provided with a shaft (73) that is driven by the transmission assembly (5). The inner cavity of the water tank (71) is filled with a heat-conducting solution.

2. The ink supply device for a printing press according to claim 1, characterized in that, The scraper assembly (6) includes a lever arm (61) rotatably connected to the top of both ends of the ink tank (4), and the lever arm (61) is connected to the transmission swing assembly (51). The bottom of the lever arm (61) is fixedly connected to a scraper (62) that fits against the inner wall of the ink tank (4), and the outer side of the scraper (62) is fixedly installed with the heat-conducting plate (74). The scraper (62) is driven by the transmission swing assembly (51) to realize the scraper (62) swinging in the inner cavity of the ink tank (4).

3. The ink supply device for a printing press according to claim 2, characterized in that, Several shovels (63) are fixedly connected to both sides of the scraper (62), and the two sets of shovels (63) are staggered. Several filter holes (64) are provided on both sets of shovels (63).

4. The ink supply device for a printing press according to claim 2, characterized in that, The scraper (62) has a through material collection groove (65) in the middle, and the material collection groove (65) is elliptical.

5. The ink supply device for a printing press according to claim 1, characterized in that, The filter assembly (8) includes a diversion pipe (81) fixedly connected to the middle of the lower part of the ink tank (4). Both ends of the outer wall of the diversion pipe (81) are fixedly connected to the guide pipe (82). The bottom of the two guide pipes (82) are fixedly connected to the flow collection chamber (83). The middle part of the flow collection chamber (83) is fixedly connected to the collection chamber (86) connected to the feed pipe (9). The ink tank (4), the diverter pipe (81), the guide pipe (82), the flow collection chamber (83), the flow collection chamber (86), and the feed pipe (9) are connected in sequence; The inner cavity of the diverter (81) is rotatably connected to a helical rod (811) that is connected by transmission assembly (5). The inner side of the flow-gathering chamber (83) is fixedly equipped with four filter screens (861) arranged in a ring, and the filter screens (861) are located at the connection between the flow-gathering chamber (83) and the flow-collecting chamber (86).

6. The ink supply device for a printing press according to claim 5, characterized in that, The inner cavity of the flow-gathering chamber (83) is provided with two valve plates (844). The inner and outer sides of the top of the flow-gathering chamber (83) are respectively rotatably connected to the first regulating plate (84) and the second regulating plate (841). The tops of the two valve plates (844) are respectively fixedly installed to the bottoms of the first regulating plate (84) and the second regulating plate (841). The outer side of the bottom of the first adjustment disk (84) is rotatably connected to the inner side of the bottom of the second adjustment disk (841). The outer side of the top of the first adjustment disk (84) and the top of the second adjustment disk (841) are rotatably connected to a connecting frame (843). The bottom of the connecting frame (843) is rotatably connected to a gear set (842). The outer side of the gear set (842) meshes with the bottom of the outer side of the first adjustment disk (84) and the bottom of the inner side of the second adjustment disk (841). Two one-way valves (862) are fixedly installed on the outer wall of the collection chamber (86), and the two one-way valves (862) are fixedly installed with two filter screens (861) away from the guide pipe (82).

7. The ink supply device for a printing press according to claim 6, characterized in that, The bottom of the flow collection chamber (83) has two discharge ports (831) corresponding to the position of the one-way valve (862). The bottom of the flow collection chamber (83) is rotatably connected to a valve disc (851). The valve disc (851) has a through inlet (852). The bottom of the valve disc (851) is detachably connected to a collection box (85) that communicates with the inlet (852). The discharge port (831) is adapted to the inlet (852).

8. The ink supply device for a printing press according to claim 2, characterized in that, The top of both ends of the ink trough (4) is rotatably connected to a protective isolation cover (72) that is rotatably connected to the outer wall of the shaft (21), and the protective isolation cover (72) is fixedly installed on the outer wall of the lever arm (61). The outer wall of the shaft (21) is movably sleeved with a disc brake concave plate (721), and the inner wall of the disc brake concave plate (721) is pressed with a disc brake convex plate (722) which is fixedly connected to the top of the lever arm (61). A heat-conducting plate (723) which is fixedly installed on the side of the disc brake convex plate (722) away from the disc brake concave plate (721) is fixedly installed with the lever arm (61). The bottom of the heat-conducting plate (723) is fixedly connected to the end of the heat-conducting plate (74). The outer wall of the shaft (21) is provided with a sliding groove (22), and the inner wall of the shaft (21) is movably sleeved with a sliding sleeve (724) that is slidably connected to the sliding groove (22). The outer wall of the sliding sleeve (724) is fixedly connected to the inner wall of the disc brake concave plate (721), and the inner wall of the sliding sleeve (724) is provided with a spring (725) that is connected to the end of the concave roller (2).

9. A printing press ink supply device according to claim 5, characterized in that, The two ends of the shaft (73) are fixedly installed on the inner wall of the screw rod (811). Several connecting columns (731) are fixedly connected to the outer wall of the shaft (73). The inner wall of the screw rod (811) is filled with sand and gravel, and the amount of sand and gravel is 20%-30% of the inner cavity capacity of the screw rod (811).

10. A printing press ink supply device according to claim 9, characterized in that, The spiral rod (811) is located at the bottom of the inner cavity of the water tank (71). Several heat-conducting plates (711) are fixedly connected to the inner wall of the water tank (71). A through-hole (712) is opened on the heat-conducting plate (711).

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