A printing press that prevents ink condensation

Abstract

This application discloses a printing press for preventing ink condensation, relating to the field of printing presses. It includes a frame and an ink supply mechanism for feeding printing materials fixed to the upper middle part of the frame. A motor providing driving force to the ink supply mechanism is fixed to one side of the mechanism. This application utilizes a rotating bidirectional lead screw to drive a slider to move in opposite directions along a limiting rod, causing stirring frames one and two to move horizontally within the ink tank. Their interlocking teeth create a lateral shearing force, preventing pigment agglomeration and sedimentation due to high viscosity or large particle size. Simultaneously, the hinges at the bottom of stirring frames one and two link stirring frames three and four, causing them to vertically tumble at the bottom of the ink tank, continuously scraping and redispersing the deposited pigment, solving the ink sedimentation problem caused by imperfect circulation mechanisms in traditional ink supply systems. By pulling the handle, a spring is compressed and pushes a fixed block upwards, quickly removing the entire stirring assembly from the ink tank.

Description

Technical Field

[0001] This application relates to the field of printing presses, and more particularly to a printing press for preventing ink condensation. Background Technology

[0002] A printing press is a mechanical device that transfers graphic information in batches onto substrates such as paper and plastic through processes such as plate making, inking, and printing. Gravure printing press is a type of printing press, characterized by the fact that the graphic areas on the printing plate are lower than the non-graphic areas (forming pits). The ink in the non-graphic areas is scraped off by a doctor blade, leaving only the ink in the pits. Then, pressure is used to transfer the ink onto the substrate. It is often used in printing scenarios with high requirements for precision and anti-counterfeiting.

[0003] Traditional ink supply systems are prone to ink coagulation and settling due to poor ink thixotropy (such as high viscosity, large pigment particle size, or insufficient dispersant), imperfect ink supply circulation mechanism, or pigment sedimentation caused by prolonged standing. This can reduce ink fluidity, resulting in uneven ink supply and quality defects such as printing color deviation and blurred pattern edges, thus affecting overall production efficiency. Utility Model Content

[0004] To improve the problem of ink condensation and settling, this application provides a printing press that prevents ink condensation.

[0005] The printing press provided in this application for preventing ink condensation adopts the following technical solution: A printing press for preventing ink condensation includes a frame and an ink supply mechanism for feeding printing materials fixed at the upper middle part of the frame. A motor for providing driving force to the ink supply mechanism is fixed on one side of the ink supply mechanism. The ink supply mechanism includes an ink tank and a printing plate cylinder rotatably passing through the upper end of the ink tank. An impression cylinder is movably arranged above the printing plate cylinder. A stirring frame one and a stirring frame two are slidably arranged in the middle of the ink tank. A stirring frame three and a stirring frame four are respectively hinged to the bottom ends of the stirring frame one and the stirring frame two. A bidirectional lead screw is rotatably passing through one end of the ink tank. A slider connected to the stirring frame one and the stirring frame two is symmetrically threaded on the surface of the end of the bidirectional lead screw located inside the ink tank.

[0006] By adopting the above technical solution, the frame provides support for the whole, the ink supply mechanism is responsible for printing material supply, and the motor provides driving force for the ink supply mechanism; the printing plate cylinder and the impression cylinder cooperate for printing, and the stirring racks one to four slide and stir in the ink tank under the action of the bidirectional lead screw and slider to prevent ink from condensing.

[0007] Preferably, the teeth of the first stirring frame and the second stirring frame are staggered, so that the first stirring frame and the second stirring frame mesh with each other.

[0008] By adopting the above technical solution, the first and second stirring racks are interlocked due to the staggered distribution of teeth, and the ink in the ink tank is stirred during sliding to prevent ink from condensing.

[0009] Preferably, the first and second stirring racks are located on both sides of the printing plate cylinder, and the opposite sides of the first and second stirring racks are in contact with the inner walls of the middle part of the ink trough. The third and fourth stirring racks are located directly below the printing plate cylinder, and the bottom ends of the third and fourth stirring racks are in contact with the inner bottom surface of the middle part of the ink trough. When the third and fourth stirring racks are located on the inner bottom surface of the ink trough, they are perpendicular to the first and second stirring racks, respectively.

[0010] By adopting the above technical solution, stirring rack one and stirring rack two are located on both sides of the printing plate cylinder and are attached to the inner wall of the middle of the ink tank, while stirring rack three and four are located directly below the printing plate cylinder and are attached to the bottom surface of the ink tank. They are vertically matched in corresponding positions to stir the ink in the ink tank in all directions to prevent it from condensing.

[0011] Preferably, the bottom ends of both the first and second mixing racks are fixed with multiple hinges, the fixed ends of the multiple hinges are respectively fixed to the bottom ends of the first and second mixing racks, and the movable ends of the multiple hinges are respectively fixed to the top ends of the third and fourth mixing racks.

[0012] By adopting the above technical solution, by setting hinges at the bottom of stirring rack one and stirring rack two, with the fixed end connected to stirring rack one and stirring rack two, and the movable end connected to stirring rack three and stirring rack four, stirring rack three and stirring rack four can rotate flexibly relative to stirring rack one and stirring rack two, which helps to stir the ink in the ink tank in all directions to prevent the ink from condensing.

[0013] Preferably, rectangular slots are provided on both sides of the upper end of the ink trough, one end of the bidirectional lead screw passes through one side of the rectangular slot, the slider is threaded onto the end of the bidirectional lead screw located inside the rectangular slot, and the end of the bidirectional lead screw located outside the rectangular slot is fixed to the output end of the motor.

[0014] By adopting the above technical solution, the bidirectional lead screw passes through the rectangular groove and is threadedly connected to the slider inside it, and its outer end is connected to a motor. The motor drives the bidirectional lead screw to rotate, thereby driving the slider to move to achieve the stirring function and prevent ink from condensing.

[0015] Preferably, a limiting rod is movably provided at the upper end of the two sliders, and the two ends of the limiting rod are respectively fixed to the two sides of the inner wall of the rectangular groove.

[0016] By adopting the above technical solution, the limiting rod restricts the slider from rotating with the bidirectional lead screw, ensuring that the slider can only move in a straight line along the limiting rod, thereby stably driving the stirring frame to stir the ink to prevent coagulation.

[0017] Preferably, both the first and second stirring racks have a fixed block fixed to their upper ends near the slider. The upper end of the slider is movably inserted into the fixed block near the slider. A handle is movably inserted into the overlapping part of the fixed block and the slider. A spring is sleeved on one side of the bottom of the handle. The two ends of the spring are fixed to the top of the fixed block and the bottom of the handle, respectively. When the spring is in its natural state, the cylinder at the bottom of the handle is fully inserted into the first and second circular holes, and the spring has no compression.

[0018] By adopting the above technical solution, fixing blocks are installed on the first and second mixing frames, and the slider is inserted into the fixing blocks. The spring-loaded handle is inserted into the overlapping part of the two to achieve the connection and fixation of the mixing frame and the slider. This facilitates the installation and disassembly of the mixing frame for maintenance or replacement and helps prevent ink condensation.

[0019] Preferably, a feeding roller for placing the material roll to be printed is rotatably arranged on one side of the lower middle part of the frame, a take-up roller is rotatably arranged on the side opposite to the feeding roller at the lower middle part of the frame, a take-up tension roller is rotatably arranged on the upper part of the frame at the side diagonally above the take-up roller, and an unwinding tension roller is rotatably arranged on the upper middle part of the frame at the position diagonally above the feeding roller and close to the ink supply mechanism.

[0020] By adopting the above technical solution, the lower part of the frame is equipped with a feeding roller to feed the printing material roll and a take-up roller to take up the printed material, and the upper part is equipped with unwinding and take-up tension rollers, which adjust the tension when the material is unwinding and rewinding to ensure stable material transport during the printing process.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. By rotating the bidirectional lead screw, the slider moves in opposite directions along the limiting rod, causing stirring rack one and stirring rack two to move horizontally in the ink tank. Their interlocking teeth form a transverse shearing force, preventing pigments from agglomerating and settling due to high viscosity or large particle size. At the same time, the hinges at the bottom of stirring rack one and stirring rack two link stirring rack three and stirring rack four, which vertically tumble at the bottom of the ink tank, continuously scraping and redispersing the deposited pigments, solving the problem of ink settling at the bottom caused by the imperfect circulation mechanism in traditional ink supply systems.

[0022] 2. Through the reciprocating motion of four sets of stirring racks on both sides and bottom of the printing cylinder, combined with the pressing and transfer of materials by the impression cylinder, the ink in the ink trough forms a dynamic circulating flow field, which in turn drives the pigment to be evenly distributed, ensuring a stable ink supply, reducing printing color deviation and pattern edge blurring defects caused by decreased ink fluidity, and improving overall production efficiency.

[0023] 3. By pulling the handle, the bottom cylinder is disengaged from the first and second circular holes, which compresses the spring and pushes the fixed block upward. This causes the first and second stirring racks to slide out along the slider protrusion. At the same time, the hinge drives the third and fourth stirring racks to fold parallel to the main frame, thereby quickly removing the entire stirring assembly from the ink tank. This achieves a separate design between the stirring mechanism and the ink tank, simplifying the cleaning and maintenance process. Attached Figure Description

[0024] Figure 1 This is an isometric view of the overall structure of this application; Figure 2 This is an isometric view of the internal structure of the rack in this application; Figure 3 This is a frontal axonometric view of the ink supply mechanism of this application; Figure 4 This is a top-view axonometric schematic diagram of the ink supply mechanism of this application; Figure 5 This is a partial structural diagram of the ink supply mechanism in this application; Figure 6 This is an exploded view of the slider section of this application.

[0025] Reference numerals in the attached diagram: 1. Frame; 2. Ink supply mechanism; 3. Feeding roller; 4. Rewinding tension roller; 5. Rewinding roller; 6. Unwinding tension roller; 7. Motor; 8. Fixed bracket; 201. Ink trough; 202. Printing cylinder; 203. Impression cylinder; 204. Stirring rack one; 205. Stirring rack two; 206. Double-acting lead screw; 207. Limiting rod; 208. Slider; 209. Handle; 210. Spring; 211. Hinge; 212. Fixing block; 213. Rectangular hole; 214. Circular hole one; 215. Circular hole two; 216. Threaded hole; 217. Rectangular groove; 218. Circular hole three; 219. Stirring rack three; 220. Stirring rack four; 221. Circular hole four. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1 - Figure 6 This application will be described in further detail.

[0027] This application discloses a printing press that prevents ink condensation.

[0028] Reference Figure 1 , Figure 2A printing press for preventing ink condensation includes a frame 1 and an ink supply mechanism 2 for feeding printing materials fixedly at the upper middle part of the frame 1. A motor 7 for providing driving force to the ink supply mechanism 2 is fixedly mounted on one side of the ink supply mechanism 2. A feed roller 3 is rotatably mounted on one side of the lower middle part of the frame 1 for holding the roll of material to be printed. A take-up roller 5 is rotatably mounted on the lower middle part of the frame 1, located on the side opposite to the feed roller 3 at the lower end of the frame 1. A winding tension roller 4 is rotatably mounted on one side of the upper end of the frame 1. The winding tension roller 4 is located diagonally above the winding roller 5. An unwinding tension roller 6 is rotatably mounted on the upper side of the middle part of the frame 1 near the ink supply mechanism 2. The unwinding tension roller 6 is located diagonally above the feeding roller 3. The material roll passes sequentially around the upper part of the feeding roller 3, the lower part of the unwinding tension roller 6, the contact area between the impression cylinder 203 and the printing plate cylinder 202, the upper part of the winding tension roller 4, and finally is wound up through the lower part of the winding roller 5.

[0029] Before use, the device uses the frame 1 as the basic support structure. First, the ink supply mechanism 2 is fixedly installed at the upper middle part of the frame 1. Then, a motor 7 is fixed as the power source on one side of the ink supply mechanism 2. The motor 7 is fixedly connected to the middle of the side wall of the ink tank 201 through the fixed bracket 8. One end of the bidirectional lead screw 206 is fixed to the drive end of the motor 7. The end of the printing plate cylinder 202 away from the bidirectional lead screw 206 is connected to the drive equipment of the frame 1. The feeding roller 3 and the take-up roller 5 are rotatably set on both sides of the lower middle part of the frame 1, and the take-up tension roller 4 and the unwinding tension roller 6 are rotatably set at the corresponding positions on the upper part of the frame 1. The material roll passes through the feeding roller 3, the unwinding tension roller 6, the ink supply mechanism 2, and the take-up tension roller 4 in sequence and is connected to the take-up roller 5. The feeding roller 3, the unwinding tension roller 6, the ink supply mechanism 2, the take-up tension roller 4, the take-up roller 5, and the two ends of the impression cylinder 203 are respectively connected to the drive equipment inside the frame 1.

[0030] The starting device's drive unit and motor 7 allow the material to be unwound via the feeding roller 3, passing over the unwinding tension roller 6 and the impression cylinder 203, causing the printing cylinder 202 to print on the material. Subsequently, the printed material is wound up via the winding tension roller 4 and the winding roller 5. The starting motor 7 drives the bidirectional lead screw 206 to rotate, causing the slider 208 threaded onto it to move in opposite directions along the limiting rod 207. This drives the first stirring frame 204 and the second stirring frame 205 to move horizontally along the axis of the printing cylinder 202 within the ink trough 201. Simultaneously, the hinge 211 drives the third stirring frame 219 and the fourth stirring frame 220 at the bottom to move horizontally at the bottom of the ink trough 201 along a direction perpendicular to the axis of the printing cylinder 202. Ultimately, the four sets of stirring frames form a reciprocating stirring action on both sides and the bottom of the printing cylinder 202, preventing ink from condensing in the ink trough 201.

[0031] Reference Figure 3 - Figure 6The ink supply mechanism 2 includes an ink trough 201 and a printing plate cylinder 202 rotatably penetrating the upper end of the ink trough 201. An impression cylinder 203 is movably disposed above the printing plate cylinder 202. The two ends of the impression cylinder 203 are fixed to the inner walls of the frame 1 respectively. Rectangular grooves 217 are formed on both sides of the upper end of the ink trough 201. Circular grooves 218 are formed on the inner walls of both sides of a limiting rod 207. One end of the printing plate cylinder 202 rotatably passes through the circular grooves 218, and the axis of the printing plate cylinder 202 is perpendicular to the ink trough 201. The upper surface of the groove 201 is parallel; the other end of the printing plate cylinder 202 is rotatably disposed on the side of another rectangular groove 217 near the outer wall of the printing plate cylinder 202, and this end is rotatably connected to the side wall of the rectangular groove 217 through a bearing. A stirring rack 1 204 and a stirring rack 205 are slidably disposed in the middle of the ink groove 201. The stirring rack 1 204 and the stirring rack 205 are located on both sides of the printing plate cylinder 202, and the opposite side of the stirring rack 1 204 and the stirring rack 205 is in contact with both sides of the inner wall of the middle part of the ink groove 201.

[0032] In use, the motor 7 drives the bidirectional lead screw 206 to rotate, causing the slider 208 threaded onto it to move in opposite directions along the limiting rod 207, which in turn drives the first stirring frame 204 and the second stirring frame 205 to move horizontally within the ink tank 201. Due to the interlocking teeth of the first stirring frame 204 and the second stirring frame 205, a lateral shearing force is generated on the ink in the ink tank 201 during the horizontal movement. At the same time, the hinges 211 at the bottom of the first stirring frame 204 and the second stirring frame 205 drive the third stirring frame 219 and the fourth stirring frame 220 to move horizontally at the bottom of the ink tank 201. The third stirring frame 219 and the fourth stirring frame 220 are perpendicular to the first stirring frame 204 and the second stirring frame 205, forming a shearing and scraping effect on the ink deposited at the bottom of the ink tank 201, preventing pigment sedimentation. Through the reciprocating movement of the four sets of stirring frames on both sides and the bottom of the printing plate cylinder 202, combined with the pressing and transmission of the material by the impression cylinder 203, the ink is ensured to maintain uniform fluidity during the ink supply process.

[0033] The shapes of mixing rack 1 204 and mixing rack 2 205 (e.g.) Figure 5As shown), the tooth shape of stirring frame 1 204 is adapted to the tooth shape of stirring frame 205. The teeth of stirring frame 1 204 and stirring frame 205 adopt a straight tooth design with a tooth height of 2mm, a tooth pitch of 1mm, and a tooth angle of 30°, which is suitable for the stirring needs of most inks. The tooth material is made of high-strength stainless steel to ensure its wear resistance and corrosion resistance during long-term operation. It effectively provides shear force in high-viscosity inks, thereby preventing pigment sedimentation and agglomeration. The teeth of stirring frame 1 204 and stirring frame 205 are staggered, so that stirring frame 1 204 and stirring frame 205 mesh together. The bottom ends of stirring frame 1 204 and stirring frame 205 are respectively hinged to stirring frame 3 219 and stirring frame 211. The rotation axis of hinge 211 is perpendicular to the bottom surface of ink tank 201. Stirring rack 3 219 and stirring rack 4 220 are located directly below printing plate cylinder 202, and their bottom surfaces are in contact with the inner bottom surface of ink tank 201. The bottom ends of stirring rack 3 219 and stirring rack 4 220 are in contact with the inner bottom surface of the middle part of ink tank 201. When stirring rack 3 219 and stirring rack 4 220 are located on the inner bottom surface of ink tank 201, they are perpendicular to stirring rack 1 204 and stirring rack 205 respectively. Multiple hinges 211 are fixed at the bottom ends of stirring rack 1 204 and stirring rack 205. The hinges 211 are double-axis hinges, and the hinge axis is perpendicular to the bottom surface of ink tank 201 so that stirring rack 3 219 and stirring rack 4 220 can flip at the bottom of ink tank 201.

[0034] The fixed ends of the multiple hinges 211 are respectively fixed to the bottom ends of the first mixing frame 204 and the second mixing frame 205, and the movable ends of the multiple hinges 211 are respectively fixed to the top ends of the third mixing frame 219 and the fourth mixing frame 220.

[0035] A bidirectional lead screw 206 is rotatably installed through one side of a rectangular groove 217. A circular hole is opened on one side of the rectangular groove 217, and one end of the bidirectional lead screw 206 passes through the circular hole. The end of the bidirectional lead screw 206 located outside the rectangular groove 217 is fixed to the output end of the motor 7. A fixing bracket 8 is fixed to the end of the motor 7 near the ink tank 201, and the end of the fixing bracket 8 away from the motor 7 is fixed to the surface of the ink tank 201. The surface of the end of the bidirectional lead screw 206 located inside the rectangular groove 217 has bidirectional threads. A slider 208 is symmetrically threaded on the surface of the end of the bidirectional lead screw 206 located inside the rectangular groove 217. The shape of the slider 208 is as follows (e.g., Figure 6As shown), a threaded hole 216 is provided at the lower end of slider 208. Slider 208 is threaded onto the double-acting screw 206 through the threaded hole 216. A circular hole 221 is provided in the middle of slider 208 above the threaded hole 216. A limit rod 207 is movably installed through the circular hole 221 to limit the rotation of slider 208. The two ends of the limit rod 207 are fixed to the inner walls of the rectangular groove 217. A protrusion is provided on one side of the upper end of slider 208. A circular hole 215 is provided in the middle of the protrusion. A fixing block 212 is fixed on the upper end of stirring rack 1 204 and stirring rack 205 near slider 208. The shape of the fixing block 212 is as follows (e.g., Figure 6 (As shown).

[0036] A rectangular hole 213 is provided at one end of the printing plate cylinder 202 near the slider 208. A circular hole 214 is provided on the top of the fixing block 212 near the slider 208. The circular hole 214 communicates with the rectangular hole 213. The protrusion of the slider 208 is movably inserted into the rectangular hole 213. The diameter of the circular hole 214 is the same as the diameter of the circular hole 215. When the protrusion of the slider 208 is inserted into the rectangular hole 213, the circular hole 214 and the circular hole 215 coincide. A handle 209 is movably inserted into the circular hole 214 and the circular hole 215. The shape of the handle 209 is as follows (e.g., ...). Figure 6 As shown), by pulling handle 209, stirring rack 205, stirring rack 1, stirring rack 204, stirring rack 3, and stirring rack 4 220 are pulled out from ink tank 201. A cylinder is provided on one side of the bottom end of handle 209. The diameter of the cylinder is the same as the diameter of circular hole 1 214 and circular hole 2 215. The cylinder is movably inserted into circular hole 1 214 and circular hole 2 215. A spring 210 is sleeved on the outer side of the cylinder on one side of the bottom end of handle 209 (the formula for calculating the elastic force of spring 210 is F=kx, where F represents the elastic force of spring 210 and k represents the elastic force of spring 210). The constant k of spring 210 is 500 N / m, which is suitable for common mechanical structures and provides sufficient elasticity to support the quick installation and disassembly of the mixing rack. The two ends of spring 210 are fixed to the top of fixed block 212 and the bottom of handle 209, respectively. When spring 210 is in its natural state, the cylinder at the bottom of handle 209 is fully inserted into circular hole 1 214 and circular hole 2 215. At this time, spring 210 has no compression and the cylinder is in low contact with the inner wall of circular hole 1 214 and circular hole 2 215.

[0037] Pulling handle 209 upwards disengages the cylinder at the bottom of handle 209 from circular holes 214 and 215. At this point, spring 210 is stretched. Moving fixing block 212 horizontally disengages it from circular hole 215. Continuing to pull handle 209 outwards moves fixing block 212 upwards, which in turn moves stirring racks 204 and 205 upwards. Since stirring racks 204 and 219, and stirring racks 205 and 220 are hinged together by hinge 211, stirring racks 219 and 220 change from being perpendicular to stirring racks 204 and 205 to being parallel. The stirring racks 205, 204, 219, and 220 are removed from the ink tank 201. The inside of the ink tank 201 and the stirring racks 204, 205, 219, and 220 are then cleaned. After cleaning, the stirring racks 219 and 220 are tilted and placed into the ink tank 201, so that the rectangular hole 213 of the fixing block 212 is fitted onto the protrusion on one side of the top of the slider 208. The handle 209 is released, and the spring 210 rebounds, causing the cylinder at the bottom of the handle 209 to re-insert into the circular hole 215 and the circular hole 214, thus achieving rapid fixing and separation of the stirring racks and the slider 208.

[0038] The implementation principle of a printing press for preventing ink condensation in this application embodiment is as follows: The starting motor 7 drives the bidirectional lead screw 206 to rotate, causing the slider 208 to move in opposite directions along the limiting rod 207. This causes the stirring frame 1 204 and stirring frame 205 to move horizontally within the ink trough 201, their teeth interlocking to form a transverse shearing force. Simultaneously, the hinge 211 links the bottom stirring frame 3 219 and stirring frame 4 220 to move vertically, creating a longitudinal tumbling motion of the ink at the bottom of the ink trough 201. The four stirring frames reciprocate on both sides and the bottom of the printing plate cylinder 202, combined with the pressing and transmission of the impression cylinder 203, ensuring uniform ink flow. During cleaning, pulling the handle 209 disengages the cylinder from the circular holes 1 214 and 2 215. The spring 210 is compressed, causing the stirring frame to move upwards. The hinge 211 folds the bottom stirring frame, allowing it to be removed for cleaning. For resetting, the stirring frame is tilted in, and releasing the handle 209 causes the spring 210 to spring back and fix it, achieving quick disassembly and assembly.

[0039] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A printer that prevents ink supply from coagulating, characterized by: The device includes a frame (1) and an ink supply mechanism (2) for printing materials fixed at the upper middle part of the frame (1). A motor (7) for providing driving force to the ink supply mechanism (2) is fixed on one side of the ink supply mechanism (2). The ink supply mechanism (2) includes an ink trough (201) and a printing plate cylinder (202) rotatably passing through the upper end of the ink trough (201). An impression cylinder (203) is movably arranged above the printing plate cylinder (202). A stirring frame one (204) and a stirring frame two (205) are slidably arranged in the middle of the ink trough (201). A stirring frame three (219) and a stirring frame four (220) are respectively hinged to the bottom ends of the stirring frame one (204) and the stirring frame two (205). A bidirectional lead screw (206) is rotatably passing through one end of the ink trough (201). A slider (208) connected to the stirring frame one (204) and the stirring frame two (205) is symmetrically threaded on the surface of the bidirectional lead screw (206) located inside the ink trough (201).

2. A printer to prevent ink supplied from coagulating according to claim 1, characterized by: The teeth of the first stirring rack (204) and the second stirring rack (205) are staggered, so that the first stirring rack (204) and the second stirring rack (205) mesh together.

3. A printer to prevent ink coagulation according to claim 1, wherein: The first stirring rack (204) and the second stirring rack (205) are located on both sides of the printing plate cylinder (202). The opposite side of the first stirring rack (204) and the second stirring rack (205) are attached to the inner wall of the middle part of the ink trough (201). The third stirring rack (219) and the fourth stirring rack (220) are located directly below the printing plate cylinder (202). The bottom end of the third stirring rack (219) and the fourth stirring rack (220) are attached to the inner bottom surface of the middle part of the ink trough (201). When the third stirring rack (219) and the fourth stirring rack (220) are located on the inner bottom surface of the ink trough (201), they are perpendicular to the first stirring rack (204) and the second stirring rack (205) respectively.

4. A printer to prevent ink coagulation according to claim 1, wherein: The bottom ends of the first stirring rack (204) and the second stirring rack (205) are each fixed with a plurality of hinges (211). The fixed ends of the plurality of hinges (211) are respectively fixed to the bottom ends of the first stirring rack (204) and the second stirring rack (205), and the movable ends of the plurality of hinges (211) are respectively fixed to the top ends of the third stirring rack (219) and the fourth stirring rack (220).

5. A printer to prevent ink coagulation according to claim 1, wherein: The ink trough (201) has rectangular slots (217) on both sides of its upper end. One end of the bidirectional lead screw (206) passes through one side of the rectangular slot (217). The slider (208) is threaded onto the end of the bidirectional lead screw (206) located inside the rectangular slot (217). The end of the bidirectional lead screw (206) located outside the rectangular slot (217) is fixed to the output end of the motor (7).

6. A printer to prevent ink coagulation according to claim 1, wherein: The upper ends of the two sliders (208) are movably connected with limiting rods (207), and the two ends of the limiting rods (207) are fixed to the inner walls of the rectangular groove (217) respectively.

7. A printer to prevent ink coagulation according to claim 1, wherein: Both the first stirring rack (204) and the second stirring rack (205) have a fixed block (212) fixed on the upper end of the side near the slider (208). The upper end of the slider (208) is movably inserted into the fixed block (212) near the slider (208). A handle (209) is movably inserted at the overlapping part of the fixed block (212) and the slider (208). A spring (210) is sleeved on the bottom side of the handle (209). The two ends of the spring (210) are fixed to the top of the fixed block (212) and the bottom of the handle (209), respectively. When the spring (210) is in its natural state, the cylinder at the bottom of the handle (209) is completely inserted into the first circular hole (214) and the second circular hole (215). At this time, the spring (210) has no compression.

8. A printer to prevent ink coagulation according to claim 1, wherein: A feeding roller (3) for placing the material roll to be printed is rotatably arranged on one side of the lower middle part of the frame (1). A take-up roller (5) is rotatably arranged on the side opposite to the feeding roller (3) at the lower middle part of the frame (1). A take-up tension roller (4) is rotatably arranged on the side of the upper part of the frame (1) diagonally above the take-up roller (5). An unwinding tension roller (6) is rotatably arranged on the upper middle part of the frame (1) near the ink supply mechanism (2) diagonally above the feeding roller (3).

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