Inking device of medium-low speed photogravure press

Abstract

The utility model provides an inking device of a medium-low speed gravure printing machine, and relates to the technical field of gravure printing. An outer tank body is mounted at the top of the printing ink storage tank; fixed pressing pieces are connected to two opposite ends of the top of the outer tank body; a gravure roller is mounted at the top of the outer tank body and is connected with two fixed pressing pieces; the two opposite ends of the top of the outer groove body are connected with positioning bolts. Through the design of the buffer chamber in the ink spraying knife, the flowing impact of the ink is reduced, the ink slowly flows out of the ink spraying knife, the ink is naturally sprayed on the gravure roller, the inking is more uniform, the bottom of the gravure roller is soaked in the ink storage shallow groove, the ink overflows into the ink storage groove after being full, the ink flows back to the ink storage groove more quickly, and the circulation of the ink is improved. The problems that according to a traditional medium-low-speed gravure press inking mode, the ink flowing speed is high, ink feeding is uneven, sufficient ink feeding cannot be achieved, and the distance that a gravure roller rotates from an imprinting point to the ink liquid level is long, and residual ink after transfer is dried up in ink cells are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of gravure printing, in particular to an inking device for a medium- and low-speed gravure printing machine. Background Art

[0002] Gravure printing is a printing method in which the inked portion of the printing plate is concave. Ink is applied to the concave portion of the image and text on the printing plate, and excess ink is removed using a scraper or other means. Then, under the action of printing pressure, the ink is transferred to the substrate to complete the printing process. The gravure printing machine needs to be equipped with an inking device to achieve the inking operation on the gravure roller.

[0003] In conventional medium and low speed gravure printing machines, ink is pumped from an ink barrel through an ink tube into an ink tank by an ink pump. The outlet of the ink tube is placed at one end of the ink tank, and an opening is provided at the other end of the ink tank. The height of the opening is a certain height higher than the bottom of the ink tank. When the ink level in the ink tank reaches the height of the outlet, the ink overflows from the opening and flows back into the ink barrel. A small portion of the roller surface of the gravure roller is immersed below the liquid level. After the ink is attached to the roller surface, the gravure roller rotates to the point where the scraper contacts the ink. The scraper will scrape the ink on the surface of the gravure roller clean, and the ink in the gravure cell remains in the cell. As the gravure roller rotates to the embossing point with the embossing roller and the substrate, the ink will be transferred to the substrate. In this inking method, the ink flow rate is fast, which will lead to uneven inking and inability to achieve sufficient inking. In addition, the gravure roller rotates a long distance from the embossing point to the ink level, which will cause the residual ink after the transfer to dry in the cell, and there will be a chance for air to enter the cell. Utility Model Content

[0004] The present invention relates to an inking device for a medium- and low-speed gravure printing machine, which solves the problem of a traditional inking method for a medium- and low-speed gravure printing machine, in which the ink flow rate is fast, which leads to uneven inking and inability to achieve sufficient inking, and the long distance from the embossing point to the ink level of the gravure roller, which leads to the drying of the residual ink in the mesh cells after the transfer, and the problem of air entering the mesh cells.

[0005] In a first aspect of the present disclosure, an inking device for a medium- and low-speed gravure printing press is provided, specifically comprising: an ink storage tank; an outer tank body is installed on the top of the ink storage tank, and fixed pressure pieces are connected to the opposite two ends of the top of the outer tank body; a gravure roller is installed on the top of the outer tank body, and the gravure roller is connected to two fixed pressure pieces; positioning pins are connected to the opposite two ends of the top of the outer tank body, and the positioning pins are connected to the fixed pressure pieces, and one end of the positioning pin is connected to a cotter pin; an ink pump is installed on the outside of the ink storage tank, and an ink supply tube is connected to the top of the ink pump, and a valve is connected to the top of the ink supply tube; an ink spraying knife is installed on the top of the outer tank body, and the bottom of the ink spraying knife is connected to the valve; a movable scraper is installed on the top of the outer tank body, and two ink scrapers are fixedly connected to the outside of the movable scraper.

[0006] Furthermore, the ink storage tank is connected to the liquid inlet end of the ink pump, the liquid outlet end of the ink pump is connected to the valve through the ink supply tube, the valve is connected to the ink spraying knife, the ink spraying knife is inclined toward the top side of the gravure roller, a buffer chamber is provided inside the ink spraying knife, and the distance between the ink spraying knife outlet and the gravure roller is one finger.

[0007] Furthermore, a shallow ink storage groove is provided inside the outer tank body, the bottom of the gravure roller is located in the shallow ink storage groove, the bottom of the outer tank body is inclined, and a bottom leakage port is provided at the bottom of the outer tank body, which is connected with the ink storage tank. The design of the buffer chamber inside the ink spraying knife can reduce the impact of ink flow, so that the ink can flow out of the ink spraying knife smoothly, and the ink is naturally sprayed on the gravure roller. At the same time, a valve is installed, and the amount of ink flowing out can be adjusted by adjusting the valve, which can solve the problem of gravure nail lines. The ink flows into the shallow ink storage groove, and the bottom of the gravure roller is immersed in the shallow ink storage groove. The capacity of the shallow ink storage groove is small, and it overflows into the ink storage tank after being full, so that the ink flows back to the ink storage tank faster.

[0008] Furthermore, two guide holes are provided on one side of the outer tank body, and the movable scraper frame is slidably connected to the guide holes provided in the outer tank body, and the gravure roller contacts the blades of the two scrapers.

[0009] Furthermore, two guide rods are provided on the outside of the outer trough body, and movable sliding holes are provided at the opposite ends of the movable scraper frame. The guide rods penetrate the movable sliding holes provided on the movable scraper frame, and a spring is mounted on the outside of the guide rod. One end of the spring is in contact with the movable scraper frame, and the other end of the spring is in contact with the end of the guide rod. The spring applies a thrust to the movable scraper frame, and the movable scraper frame drives the two scrapers to move inward, so that the blades of the two scrapers are in close contact with the gravure roller, and the excess ink on the outside of the gravure roller is scraped off by the scrapers.

[0010] Furthermore, a lower half groove is provided at the opposite two ends of the top of the outer groove body, the fixed pressure piece is rotatably connected to the outer groove body, an upper half groove is provided at the bottom of the fixed pressure piece, the upper half groove is communicated with the lower half groove, the upper half groove and the lower half groove form a circular hole structure, and the end of the gravure roller rotates in the circular hole structure formed by the upper half groove and the lower half groove.

[0011] Furthermore, external connecting holes are provided at two opposite ends of the top of the outer trough body, and an internal connecting hole is provided at one end of the fixed pressure piece, the internal connecting hole is connected with the external connecting hole provided on the outer trough body, the positioning pin passes through the connected external connecting hole and internal connecting hole, a through hole is provided at the end of the positioning pin, and the open pin is inserted into the through hole, when the end of the gravure roller is located in the lower half of the groove, the fixed pressure piece is rotated and engaged to make the fixed pressure piece contact with the gravure roller, the external connecting hole is connected with the internal connecting hole, the positioning pin is inserted into the external connecting hole and the internal connecting hole, the open pin is inserted into the positioning pin, the open pin fixes the positioning pin, and the positioning pin fixes the fixed pressure piece, and the gravure roller can be fixed by the fixed pressure piece.

[0012] Furthermore, an inclined sliding hole is provided on the top of the outer trough body, and the ink spraying knife is slidably connected to the inclined sliding hole provided on the outer trough body. A screw hole is provided on the top of the outer trough body, and the bottom of the screw hole is connected to the inclined sliding hole. A bolt is threadedly connected to the screw hole provided on the outer trough body, and the bottom end of the bolt is in contact with the ink spraying knife. When the gravure roller is replaced, the bolt can be rotated to separate the end of the bolt from the ink spraying knife, and the ink spraying knife is moved outward, thereby increasing the distance between the ink spraying knife and the gravure roller, thereby avoiding obstacles to the replacement of the gravure roller.

[0013] The utility model provides an inking device for a medium- and low-speed gravure printing machine, which has the following beneficial effects:

[0014] When the utility model is in use, the design of the internal buffer chamber of the ink spraying knife reduces the impact of ink flow, so that the ink flows out smoothly from the ink spraying knife, and the ink is naturally sprayed on the gravure roller instead of being sprayed, thereby reducing the generation of bubbles and making the inking more uniform. At the same time, a valve is installed, and the amount of ink flowing out is adjusted by adjusting the valve, so that the nail lines of gravure printing can be solved instead of solving the problem by reducing the viscosity of the ink. The ink flows into the shallow ink storage groove, and the bottom of the gravure roller is immersed in the shallow ink storage groove. The capacity of the shallow ink storage groove is small, and it overflows into the ink storage groove after being full, so that the ink flows back to the ink storage groove faster, which can improve the overall ink circulation efficiency.

[0015] In addition, the movable scraper frame is slidably guided through the guide hole, and the spring applies thrust to the movable scraper frame, which drives the two scrapers to move inward so that the blades of the two scrapers are in close contact with the gravure roller. The scrapers can scrape off excess ink on the outside of the gravure roller, thereby achieving a double cleaning effect on the gravure roller and ensuring printing quality.

[0016] In addition, when the end of the gravure roller is located in the lower half groove, the fixed pressure piece is rotated and engaged so that the fixed pressure piece contacts the gravure roller, the outer connecting hole is connected to the inner connecting hole, the positioning pin is inserted into the outer connecting hole and the inner connecting hole, the cotter pin is inserted into the positioning pin, the cotter pin fixes the positioning pin, the positioning pin fixes the fixed pressure piece, and the fixed pressure piece fixes the gravure roller, making the installation and fixation of the gravure roller easier, and the gravure roller can be replaced according to different printing patterns, thereby shortening the replacement time.

[0017] In addition, when replacing the gravure roller, the bolt can be turned to separate the end of the bolt from the ink knife, and the ink knife can be moved outward to increase the distance between the ink knife and the gravure roller to avoid obstruction to the replacement of the gravure roller. After the gravure roller is replaced, the ink knife is moved inward to reset, and the bolt is tightened to make the bottom end of the bolt contact with the ink knife. The ink knife is fixed by the bolt to ensure the stability of the ink knife.

[0018] Other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings of the embodiment will be briefly introduced below.

[0020] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0021] In the attached picture:

[0022] Figure 1 The schematic diagram of the overall top shaft side structure of the inking device of the medium and low speed gravure printing press of the present application is shown;

[0023] Figure 2 The overall bottom shaft side structural schematic diagram of the inking device of the medium and low speed gravure printing press of the present application is shown;

[0024] Figure 3 A schematic diagram of the top axial side structure of the ink storage tank of the inking device of the medium and low speed gravure printing press of the present application is shown;

[0025] Figure 4 A schematic diagram of the top axis side structure of the outer tank body of the inking device of the medium and low speed gravure printing press of the present application is shown;

[0026] Figure 5 A schematic diagram of the bottom axis side structure of the outer tank body of the inking device of the medium and low speed gravure printing press of the present application is shown;

[0027] Figure 6 It shows a schematic diagram of the shaft side structure of the inking device of the medium and low speed gravure printing press of the present application in the open and closed state of the fixed pressing piece;

[0028] Figure 7 A schematic diagram of the cross-sectional structure of an ink spraying knife of an inking device of a medium- and low-speed gravure printing press of the present application is shown;

[0029] Figure 8 A schematic diagram of the connection structure between a movable scraper frame and an ink scraper blade of an inking device of a medium- and low-speed gravure printing press of the present application is shown.

[0030] Reference numerals list

[0031] 1. Ink storage tank; 2. Outer tank body; 201. Lower half tank; 202. External connecting hole; 203. Oblique sliding hole; 204. Screw hole; 205. Shallow ink storage tank; 206. Guide hole; 207. Guide rod; 208. Bottom leakage port; 3. Fixed pressing piece; 301. Upper half tank; 302. Internal connecting hole; 4. Gravure roller; 5. Positioning pin; 501. Through hole; 6. Split pin; 7. Ink pump; 8. Ink supply tube; 9. Valve; 10. Ink spraying knife; 1001. Buffer chamber; 11. Movable scraper frame; 1101. Movable sliding hole; 12. Ink scraper; 13. Spring; 14. Bolt. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] Example 1: Please refer to Figures 1 to 8 :

[0034] The utility model proposes an inking device for a medium- and low-speed gravure printing machine, comprising: an ink storage tank 1; an outer tank body 2 is installed on the top of the ink storage tank 1, and fixed pressing pieces 3 are connected to the opposite ends of the top of the outer tank body 2; a gravure roller 4 is installed on the top of the outer tank body 2, and the gravure roller 4 is connected to two fixed pressing pieces 3; positioning pins 5 are connected to the opposite ends of the top of the outer tank body 2, and the positioning pins 5 are connected to the fixed pressing pieces 3, and one end of the positioning pin 5 is connected to a cotter pin 6; an ink pump 7 is installed on the outside of the ink storage tank 1, and the top of the ink pump 7 An ink supply tube 8 is connected, and a valve 9 is connected to the top of the ink supply tube 8; an ink spraying knife 10 is installed on the top of the outer tank body 2, and the bottom of the ink spraying knife 10 is connected to the valve 9; a movable scraper 11 is installed on the top of the outer tank body 2, and two scrapers 12 are fixedly connected to the outside of the movable scraper 11; the ink storage tank 1 is connected to the liquid inlet end of the ink pump 7, and the liquid outlet end of the ink pump 7 is connected to the valve 9 through the ink supply tube 8, and the valve 9 is connected to the ink spraying knife 10, and the ink spraying knife 10 is inclined toward the top side of the gravure roller 4, and a buffer is arranged inside the ink spraying knife 10 The buffer chamber 1001 is provided, and the outlet of the ink spraying knife 10 is one finger away from the gravure roller 4. The outlet of the ink spraying knife 10 is located close to the embossing point of the gravure roller 4. A shallow ink storage groove 205 is provided inside the outer tank body 2. The bottom of the gravure roller 4 is located in the shallow ink storage groove 205. The bottom of the outer tank body 2 is inclined. A bottom leakage port 208 is provided at the bottom of the outer tank body 2. The bottom leakage port 208 is connected to the ink storage tank 1. The design of the buffer chamber 1001 inside the ink spraying knife 10 reduces the impact of ink flow, so that the ink flows out of the ink spraying knife 10 smoothly. The ink naturally drips on the gravure roller 4 instead of being sprayed on, which reduces the generation of bubbles and makes the inking more uniform. At the same time, a valve 9 is installed. By adjusting the valve 9 to adjust the amount of ink flowing out, the problem of gravure nail lines can be solved instead of solving it by reducing the viscosity of the ink. The ink flows into the shallow ink storage groove 205, and the bottom of the gravure roller 4 is immersed in the shallow ink storage groove 205. The capacity of the shallow ink storage groove 205 is small. When it is full, it overflows into the ink storage groove 1, so that the ink flows back to the ink storage groove 1 faster, which can improve the overall ink circulation efficiency.

[0035] In the embodiment of the present disclosure, two guide holes 206 are provided on one side of the outer tank body 2, and the movable scraper frame 11 is slidably connected to the guide holes 206 provided on the outer tank body 2. The gravure roller 4 contacts the blades of the two scrapers 12. Two guide rods 207 are provided on the outer side of the outer tank body 2. The movable scraper frame 11 is provided with movable sliding holes 1101 at opposite ends. The guide rod 207 passes through the movable sliding holes 1101 provided on the movable scraper frame 11. The guide rod 207 is provided with a spring 13 on the outside. One end of the spring 13 is It contacts the movable scraper frame 11, and the other end of the spring 13 contacts the end of the guide rod 207; adopting the above technical scheme, the movable scraper frame 11 is slidably guided by the guide hole 206, and the spring 13 applies thrust to the movable scraper frame 11, and the movable scraper frame 11 drives the two scrapers 12 to move inward, so that the blades of the two scrapers 12 are in close contact with the gravure roller 4, and the excess ink on the outside of the gravure roller 4 is scraped off by the scrapers 12, which has a double cleaning effect on the gravure roller 4 and ensures the printing quality.

[0036] In the embodiment of the present disclosure, lower half grooves 201 are provided at opposite ends of the top of the outer trough body 2, the fixed pressing piece 3 is rotatably connected to the outer trough body 2, an upper half groove 301 is provided at the bottom of the fixed pressing piece 3, the upper half groove 301 is communicated with the lower half groove 201, and the upper half groove 301 and the lower half groove 201 form a circular hole structure, and the end of the gravure roller 4 rotates in the circular hole structure formed by the upper half groove 301 and the lower half groove 201, and an outer connecting hole 202 is provided at opposite ends of the top of the outer trough body 2, and an inner connecting hole 302 is provided at one end of the fixed pressing piece 3, and the inner connecting hole 302 is communicated with the outer connecting hole 202 provided on the outer trough body 2, and the positioning pin 5 passes through the connected outer connecting hole 202 and the inner connecting hole 302, and the end of the positioning pin 5 A through hole 501 is provided in the part, and the cotter pin 6 is inserted into the through hole 501; by adopting the above technical scheme, when the end of the gravure roller 4 is located in the lower half groove 201, the fixed pressing piece 3 is rotated and buckled to make the fixed pressing piece 3 contact with the gravure roller 4, the outer connecting hole 202 is connected with the inner connecting hole 302, the positioning pin 5 is inserted into the outer connecting hole 202 and the inner connecting hole 302, the cotter pin 6 is inserted into the positioning pin 5, the cotter pin 6 fixes the positioning pin 5, the positioning pin 5 fixes the fixed pressing piece 3, and the fixed pressing piece 3 fixes the gravure roller 4, which makes the installation and fixation of the gravure roller 4 easier, and is convenient for replacing the gravure roller 4 according to different printing patterns, thereby shortening the replacement time.

[0037] Embodiment 2, on the basis of embodiment 1, an inclined sliding hole 203 is provided on the top of the outer trough body 2, and the ink spraying knife 10 is slidably connected to the inclined sliding hole 203 provided on the outer trough body 2, and a screw hole 204 is provided on the top of the outer trough body 2, and the bottom of the screw hole 204 is connected with the inclined sliding hole 203, and the screw hole 204 provided on the outer trough body 2 is threadedly connected with a bolt 14, and the bottom end of the bolt 14 is in contact with the ink spraying knife 10; adopting the above technical scheme, when the gravure roller 4 is replaced, the bolt 14 can be rotated to separate the end of the bolt 14 from the ink spraying knife 10, and the ink spraying knife 10 can be moved outward to increase the distance between the ink spraying knife 10 and the gravure roller 4 to avoid hindering the replacement of the gravure roller 4. After the gravure roller 4 is replaced, the ink spraying knife 10 is moved inward and reset, and the bolt 14 is tightened to make the bottom end of the bolt 14 contact with the ink spraying knife 10, and the ink spraying knife 10 is fixed by the bolt 14 to ensure the stability of the state of the ink spraying knife 10.

[0038] The working principle of this embodiment is as follows: first, the end of the gravure roller 4 is located in the lower half groove 201, the fixed pressure piece 3 is rotated and buckled, so that the fixed pressure piece 3 contacts the gravure roller 4, the outer connecting hole 202 is connected to the inner connecting hole 302, the positioning pin 5 is inserted into the outer connecting hole 202 and the inner connecting hole 302, the cotter pin 6 is inserted into the positioning pin 5, the cotter pin 6 fixes the positioning pin 5, the positioning pin 5 fixes the fixed pressure piece 3, and the fixed pressure piece 3 fixes the gravure roller 4; next, the ink spraying knife 10 is moved and adjusted to reduce the distance between the ink spraying knife 10 and the gravure roller 4, so that the distance between the ink spraying knife 10 and the gravure roller 4 is one finger, and the bolt 14 is tightened to make the bottom end of the bolt 14 contact with the ink spraying knife 10, and the ink spraying knife 10 is fixed by the bolt 14 The ink knife 10 is fixed to ensure the stability of the ink knife 10; during the rotation printing process of the gravure roller 4, the ink pump 7 transports the ink in the ink storage tank 1 to the ink knife 10. The design of the buffer chamber 1001 inside the ink knife 10 reduces the impact of ink flow, so that the ink flows out of the ink knife 10 smoothly, and the ink is naturally sprinkled on the gravure roller 4; the amount of ink outflow is adjusted by adjusting the valve 9 to solve the gravure nail lines, rather than solving it by reducing the viscosity of the ink. The ink flows into the shallow ink storage tank 205, and the bottom of the gravure roller 4 is immersed in the shallow ink storage tank 205. The capacity of the shallow ink storage tank 205 is small. After being full, it overflows into the ink storage tank 1, so that the ink flows back to the ink storage tank 1 faster, thereby improving the overall ink circulation efficiency.

[0039] In this article, there are a few points to note:

[0040] 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0041] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0042] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. Inking device for medium and low speed gravure printing press, including: An ink storage tank (1); characterized in that an outer tank body (2) is installed on the top of the ink storage tank (1), and fixed pressure pieces (3) are connected to opposite ends of the top of the outer tank body (2); a gravure roller (4) is installed on the top of the outer tank body (2), and the gravure roller (4) is connected to two fixed pressure pieces (3); positioning pins (5) are connected to opposite ends of the top of the outer tank body (2), and the positioning pins (5) are connected to the fixed pressure pieces (3), and one end of the positioning pin (5) is connected to a cotter pin (6); an ink pump (7) is installed on the outside of the ink storage tank (1), and an ink supply tube (8) is connected to the top of the ink pump (7), and a valve (9) is connected to the top of the ink supply tube (8); an ink spraying knife (10) is installed on the top of the outer tank body (2), and the bottom of the ink spraying knife (10) is connected to the valve (9); a movable scraper (11) is installed on the top of the outer tank body (2), and two ink scrapers (12) are fixedly connected to the outside of the movable scraper (11).

2. The inking device for a medium- and low-speed gravure printing press according to claim 1, characterized in that: The ink storage tank (1) is connected to the liquid inlet end of the ink pump (7); the liquid outlet end of the ink pump (7) is connected to the valve (9) through the ink supply pipe (8); the valve (9) is connected to the ink spraying knife (10); the ink spraying knife (10) is inclined toward the top side of the gravure roller (4); a buffer chamber (1001) is provided inside the ink spraying knife (10); and the distance between the outlet of the ink spraying knife (10) and the gravure roller (4) is one finger.

3. The inking device for a medium- and low-speed gravure printing press according to claim 1, characterized in that: The outer tank body (2) is provided with a shallow ink storage groove (205) inside, the bottom of the gravure roller (4) is located in the shallow ink storage groove (205), the bottom of the outer tank body (2) is inclined, and the bottom of the outer tank body (2) is provided with a bottom leakage port (208), and the bottom leakage port (208) is connected to the ink storage tank (1).

4. The inking device for a medium- and low-speed gravure printing press according to claim 1, characterized in that: Two guide holes (206) are provided on one side of the outer tank body (2), and the movable scraper frame (11) is slidably connected to the guide holes (206) provided on the outer tank body (2), and the gravure roller (4) is in contact with the blades of the two scrapers (12).

5. The inking device for a medium- and low-speed gravure printing press according to claim 1, characterized in that: Two guide rods (207) are provided on the outside of the outer trough body (2), and movable sliding holes (1101) are provided at opposite ends of the movable scraper frame (11). The guide rods (207) pass through the movable sliding holes (1101) provided on the movable scraper frame (11), and a spring (13) is sleeved on the outside of the guide rods (207), one end of the spring (13) is in contact with the movable scraper frame (11), and the other end of the spring (13) is in contact with the end of the guide rod (207).

6. The inking device for a medium- and low-speed gravure printing press according to claim 1, characterized in that: The outer tank body (2) is provided with lower half grooves (201) at opposite ends of the top, the fixed pressing piece (3) is rotatably connected to the outer tank body (2), the fixed pressing piece (3) is provided with an upper half groove (301) at the bottom, the upper half groove (301) is communicated with the lower half groove (201), the upper half groove (301) and the lower half groove (201) form a circular hole structure, and the end of the gravure roller (4) rotates in the circular hole structure formed by the upper half groove (301) and the lower half groove (201).

7. The inking device for a medium- and low-speed gravure printing press according to claim 1, characterized in that: The outer trough body (2) is provided with outer connection holes (202) at two opposite ends of the top, and the fixed pressure piece (3) is provided with an inner connection hole (302) at one end, the inner connection hole (302) is connected with the outer connection hole (202) provided on the outer trough body (2), the positioning pin (5) passes through the connected outer connection hole (202) and the inner connection hole (302), and the end of the positioning pin (5) is provided with a through hole (501), and the split pin (6) is inserted into the through hole (501).

8. The inking device for a medium- and low-speed gravure printing press according to claim 1, characterized in that: The top of the outer trough body (2) is provided with an inclined sliding hole (203), and the ink spraying knife (10) is slidably connected in the inclined sliding hole (203) provided in the outer trough body (2). The top of the outer trough body (2) is provided with a screw hole (204), and the bottom of the screw hole (204) is connected to the inclined sliding hole (203). The screw hole (204) provided in the outer trough body (2) is threadedly connected with a bolt (14), and the bottom end of the bolt (14) is in contact with the ink spraying knife (10).

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