Printing device

Abstract

The utility model relates to the field of printing equipment, and discloses a printing device which comprises a printing ink groove, a plate roller, an ink blocking device and a printing ink circulating supply device, the ink blocking device is installed on one side outside the printing ink groove and acts on the plate roller, and the printing ink circulating supply device is installed outside the printing ink groove and communicated with the bottom of the printing ink groove. The ink blocking device comprises an ink blocking plate used for covering the end of the printing roller, a translation assembly used for driving the ink blocking plate to move horizontally to be close to the printing roller and a rotating assembly used for driving the ink blocking plate to rotate to be close to the printing roller. The printing ink circulating supply device comprises a stirring mechanism used for pushing printing ink to flow in the specific direction and a material uniformizing pipe used for evenly conveying the printing ink into the printing ink groove. The stirring mechanism is installed at the bottom of the supply groove. The technical problems of high equipment maintenance cost and high operation complexity caused by ink layering and splashing in the aspect of ink management of an existing printing machine are solved.

Description

Technical Field

[0001] The utility model relates to the field of printing equipment, in particular to a printing device. Background Art

[0002] Gravure printing plays an important role in the field of packaging printing. During printing, ink is filled into the pits, and then the ink attached to the blank part is scraped off with a scraper. The ink in the pits is transferred to the surface of the substrate under appropriate printing pressure. Because the plate roller used for printing can rotate at high speed, the printing speed can reach more than 300m / min, which is suitable for large-scale production.

[0003] In order to ensure the fluidity of the ink, the existing printing device usually designs the ink tank to be deeper, but the plate roller only contacts the upper layer of the ink during the rotation process; this design makes it impossible for the plate roller to effectively stir and mix the lower layer of ink in the ink tank, and the lower layer of ink is often denser due to the natural gravity stratification of the pigment material. The plate roller only contacts the lighter upper layer of ink, which exacerbates the stratification phenomenon in the ink tank.

[0004] The lighter ink on the upper layer is more likely to splash when the plate roller rotates at high speed. Ink splashing not only pollutes the printing environment, but also may damage other parts of the printing press, increasing the maintenance cost of the equipment. In order to deal with this problem, a method is adopted in the prior art, that is, to cover the other space between the ink tank and the plate roller tightly. Although this method reduces ink splashing to a certain extent, it also brings new problems.

[0005] First, this covering design has very high requirements for the size matching between the ink tank and the plate roller, because any slight size difference may lead to poor covering or friction, which in turn affects the printing quality and equipment life. This high requirement reduces the versatility of the equipment and increases the manufacturing cost. Secondly, when it is necessary to clean the ink tank or replace the plate roller, the disassembly and assembly work becomes cumbersome and time-consuming due to the existence of the covering structure. This not only increases downtime and reduces production efficiency, but also increases the labor intensity of operators. Utility Model Content

[0006] The utility model aims to provide a printing device, which solves the technical problems of ink stratification and splashing in ink management of existing printing machines, thereby causing high equipment maintenance costs and high operation complexity.

[0007] To achieve the above object, the utility model adopts the following technical solution: a printing device, comprising an ink tank and a plate roller, an ink blocking device and an ink circulation supply device, wherein the ink blocking device is installed on one side outside the ink tank and acts on the plate roller, and the ink circulation supply device is installed outside the ink tank and communicates with the bottom of the ink tank;

[0008] The ink shielding device comprises an ink shielding plate for covering the end of the plate roller, a translation assembly for driving the ink shielding plate to translate close to the plate roller, and a rotation assembly for driving the ink shielding plate to rotate close to the plate roller, the ink shielding plate is detachably mounted on a mounting plate, the mounting plate is fixedly mounted on the translation assembly, and the translation assembly is fixedly mounted on the rotation assembly;

[0009] The ink circulation supply device includes a baffle, a stirring mechanism for pushing the ink to flow in a specific direction and a mixing tube for uniformly transporting the ink into the ink tank, the baffle divides the ink tank into a supply tank and an overflow tank, the stirring mechanism is installed at the bottom of the supply tank, the mixing tube is arranged in parallel behind the plate roller, a filter port is provided at the bottom of the supply tank below the mixing tube, and the filter port is connected to a storage barrel through a reflux pipe; a valve and a filter tube are provided on the reflux pipe, and the ink passes through the valve, the filter tube and the storage barrel in sequence from the filter port; the filter tube is detachably installed on the reflux pipe, and a filter screen is clamped in the filter tube.

[0010] The principle and advantages of this scheme are as follows: the ink shielding device effectively prevents ink splashing when the plate roller rotates at high speed by covering the ink shielding plate at the end of the plate roller; and the ink shielding plate can be detachably mounted on the mounting plate, which is convenient for cleaning and replacement, thereby reducing downtime and improving production efficiency; the ink shielding plate can be flexibly adjusted through the translation component and the rotation component to adapt to different plate roller sizes and printing requirements; this design improves the versatility and operational convenience of the equipment, and can be quickly removed without removing the ink shielding plate, which is convenient for other operations in the ink tank or the plate roller;

[0011] The ink circulation supply device promotes the flow of ink in the supply tank through the stirring mechanism, preventing the stratification of ink caused by long-term static state; this ensures the quality and color consistency of the printed matter, and the gentle stirring ensures that the ink has a consistent consistency when used, and indirectly reduces the splashing phenomenon caused by uneven ink consistency by ensuring the uniformity and stability of the ink consistency and viscosity;

[0012] The filter tube and filter screen set on the return pipe can effectively remove impurities in the ink and ensure the purity of the ink; this further improves the quality and stability of the printed product; the filter port at the bottom of the supply tank guides the excess ink into the storage barrel through the return pipe, realizing the recovery and reuse of the ink. This not only reduces the waste of ink, but also reduces the production cost. The material mixing pipe is arranged in parallel behind the plate roller, which can evenly transport the ink into the ink tank. This ensures that the plate roller can evenly contact the ink during the rotation process, improving the printing quality. The ink circulation supply device promotes the flow of ink in the supply tank through the stirring mechanism, preventing the stratification of the ink caused by long-term static state; the printing device manages the ink comprehensively from multiple aspects, thereby avoiding the stratification and splashing of the ink, thereby reducing the technical problems of equipment maintenance cost and operation complexity.

[0013] As an improvement, the ink blocking device also includes a scraper for scraping off excess ink on the surface of the plate roller, the ink blocking plate includes an upper baffle and a lower baffle, the scraper is located between the upper baffle and the lower baffle, the upper baffle is a thin sheet that arches upward, and the upper baffle covers the upper part of the plate roller; the lower baffle is a thin sheet that arches downward, and the lower baffle covers the lower part of the plate roller.

[0014] The beneficial effects of the present improvement are as follows: the upper baffle and the lower baffle cover the upper part and the lower part of the plate roller respectively, and this design enables the ink shielding device to cover the plate roller more comprehensively, further reducing ink splashing and leakage; the upper baffle is an upwardly arched thin sheet, which can closely fit the upper surface of the plate roller, and the lower baffle is a downwardly arched thin sheet, which can also closely fit the lower surface of the plate roller; this design enhances the sealing and stability of the ink shielding device;

[0015] The scraper, upper baffle and lower baffle are all detachable parts, which are convenient for cleaning and replacement; this reduces downtime and improves production efficiency; the modular design of these parts makes the installation and removal process simpler and faster, reducing the difficulty of operation.

[0016] As an improvement, the scraper is detachably fixed on a mounting plate, an extension surface extending toward the plate roller is provided at one end of the mounting plate close to the scraper, the lower baffle is detachably fixed on the extension surface of the mounting plate, and the upper baffle is detachably fixed on the scraper.

[0017] The beneficial effects of this improvement are: the lower baffle is fixed by the extended surface of the mounting plate, making the entire ink shield device more stable; this design reduces the vibration and displacement of the ink shield device when the plate roller rotates at high speed, further improving the printing quality and the stability of the equipment operation; because the scraper and the upper and lower baffles are all adjustable and fixed on the mounting plate and the scraper, this design enables the ink shield device to flexibly adapt to plate rollers of different sizes and types. This provides higher versatility and adaptability for the printing press.

[0018] As an improvement, the translation assembly includes a screw rod, a screw rod seat and a moving block. The screw rod is rotatably installed in the screw rod seat. One end of the screw rod is rotatably connected to the inner wall of the screw rod seat. The other end of the screw rod passes through the screw rod seat and is provided with a turntable. The screw rod is rotatably connected to the side wall of the screw rod seat passed through. A moving block is threadedly sleeved on the screw rod, and the moving block is fixedly connected to the mounting plate.

[0019] The beneficial effects of this improvement are: the screw is driven to rotate by rotating the turntable, and the moving block can achieve precise translation under the action of the thread on the screw; the position adjustment of the ink shielding device is more precise, which helps to improve the accuracy and consistency of printing; the design of the turntable allows the operator to easily rotate the screw manually or by power drive to adjust the position of the moving block and the ink shielding device; the operating difficulty is reduced and the work efficiency is improved; and the ink shielding device is more stable during the translation process, which is conducive to improving printing quality, improving the versatility and adaptability of the equipment, and making the equipment suitable for a wider range of printing needs.

[0020] As an improvement, the rotating assembly includes a base and a rotating shaft, the base is rotatably connected to both ends of the rotating shaft, the screw seat is fixedly connected to the rotating shaft, and the rotating shaft and the screw are respectively fixedly connected to the output end of the servo motor.

[0021] The beneficial effect of this improvement is that the servo motor drives the rotating shaft and the screw rod to realize the automatic adjustment of the ink shielding device. The operator can accurately control the position and angle of the ink shielding device through programming or control system, which greatly improves the work efficiency and operation accuracy.

[0022] As an improvement, the stirring mechanism includes a rotating rod and paddles, both ends of the rotating rod are rotatably connected to the inner wall of the supply trough, the rotating rod is connected to a driving motor, there are multiple paddles, and the multiple paddles are fixedly arranged in a row on the rotating rod, there are multiple rotating rods, and the multiple rotating rods are evenly spaced and arranged at the bottom of the supply trough.

[0023] The beneficial effects of this improvement are: the stirring mechanism can effectively stir the ink at the bottom of the supply groove, avoiding the accumulation and waste of ink at the bottom and improving the utilization rate of the ink; through the action of the stirring mechanism, the ink presents a uniform flow state in the supply groove, making the ink supplied to the plate roller more uniform, which is beneficial to improving the quality of the printed product.

[0024] As an improvement, one end of the rotating rod extending out of the supply slot is fixedly connected to a sprocket, and the sprockets of multiple rotating rods are meshed by chains. The sprocket of one of the rotating rods is fixedly connected to the output end of the driving motor, and the sprocket and chain are both installed on the outer wall of the ink tank.

[0025] The beneficial effects of this improvement are: the sprockets of multiple rotating rods are meshed and connected by chains, ensuring that all rotating rods can rotate synchronously under the drive of the driving motor; this avoids the problem of uneven stirring caused by inconsistent rotating speeds of the rotating rods and improves the stirring effect; the transmission method of sprockets and chains is adopted, which reduces the number of transmission parts and simplifies the structure of the stirring mechanism. This not only reduces the manufacturing cost, but also improves the reliability and stability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1It is a schematic structural diagram of an embodiment of the utility model.

[0027] Figure 2 for Figure 1 A partial enlarged view of point A in the middle.

[0028] Figure 3 for Figure 1 A partial enlarged view of point B in the middle.

[0029] Figure 4 It is a structural schematic diagram of the mounting plate in a vertical state.

[0030] Figure 5 It is a structural schematic diagram of the mounting plate in a horizontal state.

[0031] Figure 6 This is a schematic diagram of the structure of the blade.

[0032] Figure 7 Schematic diagram of the structure of the filter tube. DETAILED DESCRIPTION

[0033] The following is further described in detail through specific implementation methods:

[0034] The figure marks in the drawings of the specification include: ink tank 1, plate roller 2, mounting plate 3, scraper 4, upper baffle 5, lower baffle 6, bolt 7, compression spring 8, pressure plate 9, fixed seat 10, fixed block 11, locking piece 12, screw 13, screw seat 14, moving block 15, rotating shaft 16, base 17, baffle 18, storage barrel 19, ink supply purification device 20, material mixing pipe 21, reflux pipe 22, paddle 23, bristles 24, filter port 25, valve 26, filter pipe 27, semi-pipe body 28, rubber strip 29, bolt hole 30 and filter screen 31.

[0035] Example

[0036] A printing device comprises an ink circulation supply device and an ink blocking device, wherein the ink blocking device is installed on one side outside the ink tank 1 and acts on the plate roller 2, and the ink circulation supply device is installed outside the ink tank 1 and communicates with the bottom of the ink tank 1;

[0037] As attached Figure 1As shown, an ink circulation supply device includes an ink tank 1, a baffle 18, a storage barrel 19 and an ink supply purification device 20 for providing pumping pressure and filtering fine particles in the ink. The baffle 18 divides the ink tank 1 into a supply tank and an overflow tank. The height of the baffle 18 is lower than the tank depth of the ink tank 1. A reflux port is provided at the bottom of the overflow tank, and the reflux port is connected to the storage barrel 19 through a reflux pipe 22. A reflux port is provided at the bottom of the overflow tank, and the reflux port is connected to the storage barrel 19 through a reflux pipe 22. The printing roller is located in the supply slot, and a material mixing pipe 21 is provided in the supply slot. The material mixing pipe 21 is provided with multiple discharge holes. The material mixing pipe 21 is arranged in parallel behind the plate roller 2. The outer port of the material mixing pipe 21 is connected with the outlet of the ink supply purification device 20, and the inlet of the ink supply purification device 20 is connected with the storage barrel 19 through a pipeline; the ink supply purification device 20 includes an air-operated diaphragm pump and an ink filter. The inlet of the air-operated diaphragm pump is connected with the storage barrel 19 through a pipeline, and the outlet of the ink filter is connected with the material mixing pipe 21 through a supply pipe.

[0038] The ink in the supply tank overflows from the baffle 18 to the overflow tank, and enters the reflux pipe 22 through the reflux port, and then enters the storage barrel 19 for temporary storage. The ink supply purification device 20 connected to the outlet of the storage barrel 19 pumps out the ink in the storage barrel 19, and the ink supply purification device 20 presses the ink out of the outlet of the storage barrel 19 and purifies the fine particles, and then flows through the pipeline to the mixing pipe 21. The multiple discharge holes on the mixing pipe 21 return the ink to the ink tank 1, thereby realizing the circulation of the ink.

[0039] As attached Figure 6 As shown, a stirring mechanism is provided at the bottom of the supply trough, and the stirring mechanism includes a rotating rod and a paddle 23. Both ends of the rotating rod are rotatably connected to the inner wall of the supply trough, and one end of the rotating rod extending out of the supply trough is connected to the output end of the motor. There are multiple paddles 23, and multiple paddles 23 are fixedly arranged in a row on the rotating rod, and there are multiple rotating rods; along the direction of the material mixing pipe 21 by the baffle 18, multiple rotating rods are arranged at equal intervals at the bottom of the supply trough; the paddles 23 located in the same row on adjacent rotating rods are staggered, and the blades of one paddle 23 can cut into the space between the blades of another paddle 23; so that the stirring ranges of the paddles 23 located in the same row are continuous.

[0040] One end of the rotating rod extending out of the supply slot is fixedly connected to a sprocket, and the sprockets of multiple rotating rods are meshed through a chain to form a chain transmission system, so that the paddles 23 on multiple rotating rods rotate in the same direction and at the same frequency, and the rotation of adjacent paddles 23 in the same row is coordinated without interference. The sprocket of one of the rotating rods is fixedly connected to a driving motor, which is used to realize the rotation of all the paddles 23; all the sprockets and chains are installed on the outer wall of the ink tank 1. The blades of the paddles 23 are spiral-shaped, and the paddles 23 on the same rotating rod have the same spiral direction, while the paddles 23 on adjacent rotating rods have opposite spiral directions, so that the paddles 23 on two adjacent rotating rods push the ink to flow in opposite directions. The blade ends of the paddles 23 are provided with bristles 24.

[0041] The drive motor is started, and the meshing transmission of the chain and the sprocket realizes that all the paddles 23 rotate at the same frequency, pushing the ink of the entire lower layer from the baffle 18 to the direction of the material mixing pipe 21. In addition, the ink in the adjacent rotating rod areas flows staggered to achieve the mixing of the lower layer of ink; the ink at the bottom of the baffle 18 is removed and the vacancy causes the upper layer of ink to fall, accelerating the mixing of the upper and lower layers of ink. The bristles 24 on the blades of the paddle 23 contact and clean the bottom, inner wall and corner of the ink tank 1 to avoid the possibility of ink accumulation.

[0042] A filter port 25 is provided at the bottom of the supply tank below the material mixing tube 21, and the filter port 25 is connected to the storage barrel 19 through the return pipe 22; the bottom of the overflow tank is in a constricted shape, and the area of ​​the supply tank located at the filter port 25 is also in a constricted shape; a valve 26 and a filter tube 27 are provided on the return pipe 22, and the ink passes through the valve 26, the filter tube 27 and the storage barrel 19 in sequence from the filter port 25; the filter tube 27 is detachably mounted on the return pipe 22, and a filter screen 31 is clamped in the filter tube 27. The return pipe 22 where the valve 26 and the filter tube 27 are located is a vertical pipe section.

[0043] The brush 24 on the paddle 23 sweeps the fuel or impurity particles that cannot be re-blended into the ink by stirring toward the filter port 25. The operator opens the valve 26 regularly, so that the ink with impurities above the filter port 25 flows into the reflux pipe 22, and the impurity particles are intercepted on the filter screen 31. The remaining normal ink enters the storage barrel 19 and flows back to the ink tank 1 through the ink supply purification device 20 through the material mixing pipe 21. After the filter screen 31 has been used for a period of time, the filter tube 27 is disassembled with the valve 26 closed, and the filter screen 31 clamped in the filter tube 27 is cleaned or replaced.

[0044] As attached Figure 7As shown, the filter tube 27 is two half-pipe bodies 28 connected to each other. The two butt ends of the half-pipe bodies 28 are connected by hinges and bolts respectively. Bolt holes 30 are provided at the bolt fixing ends. The axial ends of the half-pipe bodies 28 are wrapped on the return pipe 22, and rubber strips 29 are provided at the four ends of the half-pipe bodies 28. The end faces of the two half-pipe bodies 28 butted against each other are sealed by two layers of rubber fitting and extrusion. The two ports connecting the return pipe 22 and the filter tube 27 are in a stepped shape extending outward. The rubber strips 29 at the upper and lower ends of the half-pipe bodies 28 are wrapped around the outward extension of the return pipe 22. The stepped shape causes the rubber strips 29 to deform and achieves a sealed and stable clamping of the ports.

[0045] The bolts of the two half-pipe bodies 28 are threadedly removed from the bolt holes 30, so that the two half-pipe bodies 28 are slightly unfolded from the hinges and then removed from the return pipe 22. Then the filter screen 31 is removed from the inner wall clamping part of the half-pipe body 28 to achieve replacement and cleaning. The filter screen 31 is nylon fiber or metal wire mesh. The clamping part of the filter screen 31 has a certain deformation ability, so that when the filter screen 31 is clamped on the inner wall of the half-pipe body 28, the two half-pipe bodies 28 can still be slightly unfolded to be removed from the return pipe 22.

[0046] The storage barrel 19 is horizontally arranged, the inlet of the storage barrel 19 is located above one end of the storage barrel 19, and the outlet of the storage barrel 19 is located below the other end of the storage barrel 19. The ink in the storage barrel 19 flows horizontally from the inlet to the outlet. The circumferential outer wall of the storage barrel 19 is provided with a heating layer, and the heating layer is heated by an electric heating wire to heat the ink in the storage barrel 19 to improve the fluidity of the ink.

[0047] The ink blocking device is installed beside the ink tank 1 to prevent the high-speed running plate roller 2 in the ink tank 1 from bringing out the ink and splashing around to cause pollution. The ink blocking device includes a supporting mechanism and a baffle mechanism, wherein the baffle mechanism is installed on the adjusting mechanism, and the supporting mechanism is installed beside the ink tank 1.

[0048] The baffle mechanism includes a mounting plate 3, a scraper 4 for scraping off excess ink on the surface of the plate roller 2, an upper baffle 5, a lower baffle 6 and a mounting assembly. The scraper 4 is detachably fixed to the mounting plate 3, and one end of the scraper 4 is the contact end of the peripheral surface of the plate roller 2. The upper baffle 5 is an upwardly arched thin sheet, which is located above the scraper 4 and covers the upper part of the plate roller 2. One end of the upper baffle 5 is detachably fixed to the scraper 4. The lower baffle 6 is a downwardly arched thin sheet, which is located below the scraper 4 and covers the lower part of the plate roller 2. One end of the lower baffle 6 is detachably fixed to the mounting plate 3.

[0049] As attached Figure 2 and attached Figure 3As shown, the mounting assembly includes a baffle fixing component and a scraper 4 fixing component, the baffle fixing component includes a bolt 7, a pressure plate 9 and a clamping spring 8, the upper baffle 5 and the lower baffle 6 are respectively mounted on the scraper 4 and the mounting plate 3 through the baffle fixing component, the pressure plate 9 includes an integrally formed pressing surface and a lifting portion, the pressing surface is a long rectangular surface, one end of the lifting portion is arranged at the middle section of the pressing surface, and the pressing surface and the lifting portion are T-shaped plates with the tail ends raised; a through hole is provided on the pressing surface, an internal threaded hole opposite to the pressing surface is provided on the mounting surface, and the clamping spring 8 is wound around the screw of the bolt 7 On the top, the screw of the bolt 7 passes through the through hole of the pressure surface and is threadedly connected with the internal threaded hole on the installation surface, fixing the pressure plate 9 on the installation surface, and the clamping spring 8 is located between the head of the bolt 7 and the pressure plate 9 in a compressed state. The upper and lower baffles are located between the installation surface and the pressure plate 9 and clamped and fixed; the staff holds the lifting part to move the pressure plate 9 outward along the axial direction of the bolt 7, and the clamping spring 8 continues to compress and pull the distance between the pressure plate 9 and the installation surface so that the baffle can be withdrawn; the lifting part is released, and the clamping spring 8 squeezes the pressure plate 9, so that the pressure plate 9 returns to a state of being close to the installation surface. The end of the lifting part away from the pressure surface tilts away from the installation surface. The two ends of the pressure plate 9 are fixed to the installation surface by two groups of bolts 7 and the clamping spring 8 respectively.

[0050] The mounting plate 3 is provided with an extension surface extending toward the ink tank 1 at one end close to the scraper 4, and the bolts 7 of the baffle fixing member for mounting the lower baffle 6 fix the pressing plate 9 on the extension surface, and one end of the lower baffle 6 is clamped between the pressing plate 9 and the extension surface; the bolts 7 of the baffle fixing member for mounting the upper baffle 5 fix the pressing plate 9 on the scraper 4, and one end of the upper baffle 5 is clamped between the pressing plate 9 and the scraper 4. The length of the pressing surface of the pressing plate 9 is greater than the width of the upper and lower baffles, thereby increasing the range of adjustment of the upper and lower baffles in the pressing plate 9.

[0051] The ink outlets in the ink tank 1 are located at the two ends of the plate roller 2, so the lower baffle 6 and the upper baffle 5 are two pieces, and are respectively installed at the two ends of the plate roller 2.

[0052] As attached Figure 4As shown, the scraper 4 fixing component includes a fixing seat 10, a fixing block 11 and a locking piece 12. The fixing seat 10 is in the shape of a rectangular block, and the fixing seat 10 is welded on the surface of the mounting plate 3. An internal threaded hole is provided on the upper surface of the fixing seat 10. The fixing block 11 is a three-sided folded plate, which is generally low in the front and high in the back. The rear end face is parallel to the front end face but relatively backward, forming a staggered parallel relationship. The front end face and the rear end face are connected by a folded surface, and the folded surface is inclined at a certain angle to the horizontal plane; the front end face of the fixing block 11 is fixed to the scraper 4 by bolts, and the rear end face of the fixing block 11 is provided with a strip hole, which is an open hole, and one side of the strip hole is open without an edge and is directly connected to the edge of the rear end face. The locking piece 12 is in the shape of a bolt, and the head of the locking piece 12 is in the shape of a disc tangent to the rear end face of the fixing block 11. The threaded rod of the locking piece 12 passes through the bar hole and is threadedly fixed in the internal threaded hole of the fixing seat 10, so that the rear end face of the fixing block 11 is clamped between the head of the locking piece 12 and the fixing seat 10, thereby achieving the fixation of the mounting plate 3 and the scraper 4.

[0053] Four fixing blocks 11 are evenly spaced on the scraper 4, and two fixing seats 10 and a locking member 12 are provided on the mounting plate 3. Any two adjacent fixing blocks 11 on the scraper 4 can be assembled with the fixing seats 10 on the mounting plate 3 to adjust the relative position of the scraper 4 and the mounting plate 3.

[0054] As attached Figure 5 As shown, the support mechanism includes a rotating assembly and a translation assembly, and the translation assembly includes a screw 13, a screw seat 14 and a moving block 15. The screw 13 is rotatably installed in the screw seat 14, one end of the screw 13 is rotatably connected to the inner wall of the screw seat 14 through a bearing, and the other end of the screw 13 penetrates the screw seat 14 and is provided with a turntable, and the screw 13 is rotatably connected to the side wall of the screw seat 14 through a bearing. The screw 13 is threaded with a moving block 15, which is rectangular and moves in the screw seat 14 along the axial direction of the screw 13. The moving block 15 is fixedly welded to the mounting plate 3.

[0055] The rotating assembly includes a base 17 and a rotating shaft 16. The base 17 is located at both ends of the rotating shaft 16 and is rotatably connected through bearings. The screw seat 14 is fixedly welded to the rotating shaft 16. The rotating shaft 16 and the screw 13 are respectively fixedly connected to the output end of the servo motor to drive the rotating shaft 16 and the screw 13 to rotate.

[0056] The specific implementation process is as follows:

[0057] When the ink blocking device is adjusted and put into use, the mounting plate 3 is in a vertically upward state, the strip hole opening of the fixed block 11 on the scraper 4 is aligned with the locking member 12 and inserted, and the locking member 12 is rotated to fix the scraper on the mounting plate 3, and then the pressing plate 9 on the extension is lifted to fix the lower baffle 6 on the mounting plate 3, and the rotating shaft 16 is driven to rotate 90° to extend the lower baffle 6 into the ink tank 1, and the screw rod 13 is driven to rotate to make the mounting plate 3 approach the plate roller 2 until the scraper 4 contacts the peripheral surface of the plate roller 2, and then the pressing plate 9 on the scraper 4 is lifted to fix the upper baffle 5 on the scraper 4. The upper baffle 5 and the lower baffle 6 are formed to cover the upper and lower parts of the plate roller 2 respectively.

[0058] As attached Figure 1 As shown in the figure, when the plate roller 2 is immersed in the ink and rotates clockwise at a high speed, the circumference of the plate roller 2 presses over the ink liquid surface, generating a shearing effect on the liquid surface, so that the ink moves rapidly to both sides under the pressure of the plate roller 2, and splashes out along the circumferential edges on both sides of the plate roller 2, forming axial water splashes at the end of the plate roller 2. The splashed ink will contaminate the dyed cloth to be processed and the entire printing workshop.

[0059] The rotation of the ink plate roller 2 below the plate roller 2 forms a vortex, so that part of the ink is brought out of the liquid surface with the rotation, and the setting of the lower baffle 6 can block the formation of part of the vortex below the plate roller 2, reduce the ink splashed with the rotation of the plate roller 2, and reduce the scraping pressure of the scraper 4. Furthermore, the upper baffle 5 further blocks a small part of the splashed ink, thereby achieving comprehensive blocking of the ink.

[0060] The upper baffle 5 and the lower baffle 6 are thin sheets of metal or polymer materials, so that the upper baffle 5 and the lower baffle 6 have certain support and flexibility. In addition, within the elastic deformation range, the upper baffle 5 and the lower baffle 6 can return to their original shapes after the external force is removed. The metal material can be aluminum alloy and stainless steel, etc., and the polymer material can be polyurethane, etc.

[0061] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A printing device, comprising an ink tank and a plate roller, characterized in that: It also includes an ink blocking device and an ink circulation supply device, wherein the ink blocking device is installed on one side outside the ink tank and acts on the plate roller, and the ink circulation supply device is installed outside the ink tank and communicates with the bottom of the ink tank; The ink shielding device comprises an ink shielding plate for covering the end of the plate roller, a translation assembly for driving the ink shielding plate to translate close to the plate roller, and a rotation assembly for driving the ink shielding plate to rotate close to the plate roller, the ink shielding plate is detachably mounted on a mounting plate, the mounting plate is fixedly mounted on the translation assembly, and the translation assembly is fixedly mounted on the rotation assembly; The ink circulation supply device includes a baffle, a stirring mechanism for pushing the ink to flow in a specific direction and a mixing tube for uniformly transporting the ink into the ink tank, the baffle divides the ink tank into a supply tank and an overflow tank, the stirring mechanism is installed at the bottom of the supply tank, the mixing tube is arranged in parallel behind the plate roller, a filter port is provided at the bottom of the supply tank below the mixing tube, and the filter port is connected to a storage barrel through a reflux pipe; a valve and a filter tube are provided on the reflux pipe, and the ink passes through the valve, the filter tube and the storage barrel in sequence from the filter port; the filter tube is detachably installed on the reflux pipe, and a filter screen is clamped in the filter tube.

2. A printing device according to claim 1, characterized in that: The ink shielding device also includes a scraper for scraping off excess ink on the surface of the plate roller. The ink shielding plate includes an upper baffle and a lower baffle. The scraper is located between the upper baffle and the lower baffle. The upper baffle is a thin sheet that arches upward and covers the upper part of the plate roller; the lower baffle is a thin sheet that arches downward and covers the lower part of the plate roller.

3. A printing device according to claim 2, characterized in that: The scraper is detachably fixed on a mounting plate, an end of the mounting plate close to the scraper is provided with an extension surface extending toward the plate roller, the lower baffle is detachably fixed on the extension surface of the mounting plate, and the upper baffle is detachably fixed on the scraper.

4. A printing device according to claim 3, characterized in that: The translation assembly includes a screw rod, a screw rod seat and a moving block. The screw rod is rotatably installed in the screw rod seat. One end of the screw rod is rotatably connected to the inner wall of the screw rod seat. The other end of the screw rod passes through the screw rod seat and is provided with a turntable. The screw rod is rotatably connected to the side wall of the screw rod seat passed through. A moving block is threadedly sleeved on the screw rod, and the moving block is fixedly connected to the mounting plate.

5. A printing device according to claim 4, characterized in that: The rotating assembly comprises a base and a rotating shaft. The base is rotatably connected to both ends of the rotating shaft. The screw seat is fixedly connected to the rotating shaft. The rotating shaft and the screw are respectively fixedly connected to the output ends of the servo motor.

6. A printing device according to claim 5, characterized in that: The stirring mechanism includes a rotating rod and paddles. Both ends of the rotating rod are rotatably connected to the inner wall of the supply trough. The rotating rod is connected to a driving motor. There are multiple paddles, which are fixedly arranged in a row on the rotating rod. There are multiple rotating rods, which are evenly spaced at the bottom of the supply trough.

7. A printing device according to claim 6, characterized in that: One end of the rotating rod extending out of the supply slot is fixedly connected to a sprocket, and the sprockets of multiple rotating rods are meshed through a chain, wherein the sprocket of one rotating rod is fixedly connected to the output end of the driving motor, and the sprocket and chain are both installed on the outer wall of the ink tank.

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