Control system for intaglio printing press inking

Abstract

The utility model provides a control system for intaglio printing press inking, which is used for bubble-free inking on the intaglio printing press and comprises a printing roller and a scraper printing trolley, and a printing ink groove for containing printing ink required for inking of an overprinting color group unit is mounted on the side face of the upper side of the top of the scraper printing trolley in a cantilever shape. The lower side and the two ends of the ink groove form a bucket-shaped ink backflow collecting bucket. A printing roller is rotationally mounted in the ink fountain; at least one backflow drainage hole which is positioned below the rear side of the printing roller and is used for increasing the backflow amount of the printing ink discharged into the printing ink backflow collecting hopper in the printing ink groove and increasing the circulation rate of the printing ink is formed in the printing ink groove along the axial direction of the printing roller; the bottom side of the lower end of the printing ink backflow collecting hopper is connected with a pumping pressure circulation ink supply device through a bent pipe, the pumping pressure circulation ink supply device pumps and filters printing ink and then continuously supplies the printing ink to an inking area of a printing roller in the printing ink groove, foams in the printing ink are removed through backflow drainage holes and the pumping pressure circulation ink supply device, the pattern plate defect generated by printed matter is eliminated, and the printing quality is improved.

Description

[Technical field]

[0001] The utility model relates to a gravure printing inking technology, in particular to a control system for inking a gravure printing machine. [Background technology]

[0002] In the prior art, gravure printing machines are widely used because of their fast printing speed and ability to overprint multiple color groups. When working, the gravure printing machine includes multiple printing units according to the color groups, and each overprinting unit includes an embossing roller and a printing carriage. When the printing carriage of each printing unit is working, the ink contained in the gravure pits of the printing roller on the printing carriage is directly embossed onto the substrate through the embossing roller.

[0003] In the gravure printing process, bubbles will inevitably be generated in the ink tank, attached to the printing roller, and burst when running to the scraper, causing the dots of the image to disappear, and the image to be missing or polluted in the form of water marks. The reasons for the bubbles are: first, the ink surface tension is too high and the ink viscosity is not appropriate; second, the ink circulation system is defective, the fluidity is poor, air is sucked in, the ink drop is too large, and the impact causes bubbles. After the bubbles overflow or burst, they are transferred to the substrate, which will cause large-area or full-page printed products to appear mottled or polished, affecting the quality of the printed material, causing the printed surface to be uneven, causing damage to the surface, increasing the defective rate, and affecting economic benefits.

[0004] In addition, with the increasing attention paid to environmental protection requirements and the continuous improvement of product hygiene and safety requirements, the original solvent ink in gravure printing is basically required to be changed to water-based ink. However, water-based ink is easily generated in the ink due to the high-speed rotation of the printing plate during the printing process. Bubbles are especially prominent with the widespread use of water-based snowflake ink and water-based matte ink, resulting in poor ink application and uneven appearance and other quality problems, which seriously affect the quality of gravure printing. In view of the above technical problems, the existing solutions often place plastic stirring rods or magnetic stirring rods in the ink tank to assist in eliminating bubbles, but the effect is not obvious, and bubbles will still accumulate in the ink tank and ink barrel in large quantities. [Contents of the utility model]

[0005] The embodiment of the utility model provides a control system for inking a gravure printing machine. By adding a reflux channel and increasing the ink circulation rate, the time that bubbles stay in the ink tank is reduced, and the contact between the bubbles and the printing plate of the printing roller is reduced, thereby eliminating the bubbles generated on the printing roller when the ink is quickly inked, improving the printing flatness and printing accuracy of the plate, effectively reducing the defective product rate, and improving work efficiency.

[0006] The technical solution adopted by at least one embodiment of the utility model is:

[0007] A control system for inking a gravure printing machine, used for bubble-free inking on a gravure printing machine, comprising a printing roller and a scraper printing carriage, wherein the scraper printing carriage is arranged on the lower side of the embossing roller on each group of overprinting color group units and can be pushed out and propelled from the side; and further comprising:

[0008] The scraper printing carriage is cantilevered on the upper side of the top to form an ink groove along the axial direction of the embossing roller on each group of overprinting color group units, which is used to hold the ink required for inking the overprinting color group units.

[0009] The lower side and both ends of the ink tank are formed into a bucket-shaped ink return collection bucket for collecting overflow and discharging ink at a certain discharge rate;

[0010] The printing roller is located directly below the embossing roller on each group of overprinting color group units and is coaxially mounted with the embossing roller and rotatably installed in the ink tank;

[0011] The ink tank is provided with at least one reflux leakage hole located below the rear side of the printing roller and at a distance from the bottom of the ink tank to two-thirds of the distance from the bottom of the ink tank in the direction of the ink tank edge, along the axial direction of the printing roller, for increasing the reflux amount of ink in the ink tank discharged into the ink reflux collection bucket and improving the ink circulation rate;

[0012] The ink outlet area on the upper part of the ink tank is equipped with a scraper mechanism which is arranged along the axial direction of the printing roller and which moves and presses on the surface of the printing roller after the gap is adjusted to scrape off excess ink on the printing roller plate;

[0013] The bottom side of the lower end of the ink reflux collection bucket is connected to a pump pressure circulation ink supply device through a reflux elbow pipe to pump and filter the ink and continuously supply it to the inking area of ​​the printing roller in the ink tank.

[0014] Furthermore, the pump pressure circulation ink supply device comprises an ink storage box, an ink supply pump and an ink supply hose, and the ink storage box is installed at the lower part of the frame of the scraper printing carriage;

[0015] The ink supply pump is installed on the top side of the ink storage box and directly supplies ink to the ink tank through the connected ink supply hose;

[0016] The bottom side of the ink reflux collection hopper returns the ink after the printing roller is inked to the ink storage box through the connected reflux elbow pipe.

[0017] Furthermore, the end of the ink supply hose in the ink tank is also equipped with a gauze filter for filtering impurities and preventing air bubbles and impurities from entering.

[0018] Furthermore, the top side of the ink storage box is provided with a tank cover for adding ink into the box body.

[0019] Furthermore, the reflux leakage hole is a 200mm*20mm rectangular strip hole.

[0020] The beneficial effects of at least one embodiment of the utility model are:

[0021] In the utility model, through multiple reflux leakage holes on the ink groove, the ink reflux collection bucket and the pump pressure circulation ink supply device, when the ink amount in the ink groove reaches the required inking amount, the ink can quickly flow back to the ink storage box from the reflux leakage holes, so that the bubbles generated by the ink can quickly flow back to the ink storage box from the multiple reflux leakage holes on the ink groove, effectively avoiding the contact between the bubbles in the ink groove and the printing roller plate surface, eliminating the bubble problem generated by the ink during rapid inking, evenly distributing the ink on the printing roller plate surface, eliminating the flower plate defects generated by the printed product, and improving the printing quality.

[0022] In addition, a gauze filter is installed at the end of the ink supply hose in the ink tank, which can perform secondary filtration on the ink, effectively preventing bubbles and impurities from entering the ink, and further improving the printing quality.

Brief Description of the Drawings

[0023] Figure 1 It is a partial enlarged structural schematic diagram of the ink tank after the printing roller is removed in the utility model;

[0024] Figure 2 It is a three-dimensional structural schematic diagram of the utility model. [Specific implementation method]

[0025] A control system for inking a gravure printing machine, such as Figure 1 and Figure 2As shown, it is used for bubble-free inking on a gravure printing machine, comprising a printing roller 1 and a scraper printing carriage 2, wherein the scraper printing carriage 2 is arranged on the lower side of an impression roller (not shown) on each group of overprint color group units (not shown in the figure) and can be pushed out and propelled from the side; an ink groove 3 is cantilevered on the upper side of the top of the scraper printing carriage 2 along the axial direction of the impression roller on each group of overprint color group units and is formed with an arc to accommodate the ink required for inking the overprint color group units, and a bucket-shaped ink return collection bucket 4 is formed on the lower side and both ends of the ink groove 3 to collect overflow and discharge the ink at a certain discharge rate; the printing roller 1 is located directly below the impression roller on each group of overprint color group units and is coaxial with the impression roller and rotates It is installed in the ink tank 3 and is used to transfer the ink to the embossing roller and the plate paper between the embossing roller and the printing roller 1; three reflux leakage holes 5 are evenly distributed along the axial direction of the printing roller 1 on the ink tank 3, located below the rear side of the printing roller 1 and at a distance from the bottom of the ink tank 3 to two-thirds of the distance from the bottom in the direction of the side of the ink tank 3, wherein the reflux leakage holes 5 are 200mm*20mm rectangular strip holes, and the reflux leakage holes 5 are used to increase the reflux amount of ink in the ink tank 3 discharged into the ink reflux collection bucket 4 and to improve the ink circulation rate, so that the bubbles generated by the ink can quickly flow back to the ink storage box 70 from the multiple reflux leakage holes 5 on the ink tank 3.

[0026] Continue as Figure 1 and Figure 2 As shown, a scraper mechanism 6 is installed in the ink outlet area on the upper part of the ink tank 3, which is arranged along the axial direction of the printing roller 1 and moves to contact and press the surface of the printing roller 1 after adjusting the gap to scrape off the excess ink on the printing roller 1. The bottom side of the lower end of the ink reflux collection bucket 4 is connected to a pump pressure circulation ink supply device 7 through a reflux elbow 73, which pumps and filters the ink and continuously supplies it to the ink supply area of ​​the printing roller 1 in the ink tank 3. The pump pressure circulation ink supply device 7 includes an ink storage box 70, an ink supply pump 71 and an ink supply hose 72. The ink storage box 70 It is installed on the lower part of the frame of the scraper printing carriage 2; the ink supply pump 71 is installed on the top side of the ink storage box 70, and directly supplies ink to the ink tank 3 through the connected ink supply hose 72, and the bottom side of the ink reflux collection bucket 4 returns the ink after inking the printing roller 1 to the ink storage box 70 through the connected reflux elbow 73; wherein, the end of the ink supply hose 72 in the ink tank 3 is also equipped with a gauze filter 8 for filtering impurities and preventing air bubbles and impurities from entering, and the top side of the ink storage box 70 is also provided with a tank cover 700 for adding ink into the box body.

[0027] In this embodiment, through the three reflux leakage holes 5 on the ink groove 3, the ink reflux collection bucket 4 and the pump pressure circulation ink supply device 7, when the amount of ink in the ink groove 3 reaches the required inking amount, the ink can quickly flow back to the ink storage box 70 from the reflux leakage holes 5, so that the bubbles generated by the ink can quickly flow back to the ink storage box 70 from the multiple reflux leakage holes 5 on the ink groove 3, effectively avoiding the contact between the bubbles in the ink groove 3 and the printing roller 1 plate surface, eliminating the bubble problem generated by the ink during rapid inking, and the end of the ink supply hose 72 in the ink groove 3 is also equipped with a gauze filter 8, which can perform secondary filtration on the ink, effectively preventing air bubbles and impurities from entering the ink, eliminating the flower plate defects generated by the printed product, and improving the printing quality.

[0028] The above-described embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. All equivalent changes made based on the shape, structure and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A control system for inking a gravure printing machine, used for bubble-free inking on a gravure printing machine, comprising a printing roller and a scraper printing carriage, wherein the scraper printing carriage is arranged on the lower side of the impression roller on each group of overprint color group units and can be pushed out and propelled from the side; It is characterized in that Also includes: The scraper printing carriage is cantilevered on the upper side of the top to form an ink groove along the axial direction of the embossing roller on each group of overprinting color group units, which is used to hold the ink required for inking the overprinting color group units. The lower side and both ends of the ink tank are formed into a bucket-shaped ink return collection bucket for collecting overflow and discharging ink at a certain discharge rate; The printing roller is located directly below the embossing roller on each group of overprinting color group units and is coaxially mounted with the embossing roller and rotatably installed in the ink tank; The ink tank is provided with at least one reflux leakage hole located below the rear side of the printing roller and at a distance from the bottom of the ink tank to two-thirds of the distance from the bottom of the ink tank in the direction of the ink tank edge, along the axial direction of the printing roller, for increasing the reflux amount of ink in the ink tank discharged into the ink reflux collection bucket and improving the ink circulation rate; The ink outlet area on the upper part of the ink tank is equipped with a scraper mechanism which is arranged along the axial direction of the printing roller and which moves and presses on the surface of the printing roller after the gap is adjusted to scrape off excess ink on the printing roller plate; The bottom side of the lower end of the ink reflux collection bucket is connected to a pump pressure circulation ink supply device through a reflux elbow pipe to pump and filter the ink and continuously supply it to the inking area of ​​the printing roller in the ink tank.

2. A control system for inking a gravure printing machine according to claim 1, It is characterized in that The pump pressure circulation ink supply device comprises an ink storage box, an ink supply pump and an ink supply hose, and the ink storage box is installed at the lower part of the frame of the scraper printing carriage; The ink supply pump is installed on the top side of the ink storage box and directly supplies ink to the ink tank through the connected ink supply hose; The bottom side of the ink reflux collection hopper returns the ink after the printing roller is inked to the ink storage box through the connected reflux elbow pipe.

3. A control system for inking a gravure printing machine according to claim 2, It is characterized in that The end of the ink supply hose in the ink tank is also equipped with a gauze filter for filtering impurities and preventing air bubbles and impurities from entering.

4. A control system for inking a gravure printing machine according to claim 2, It is characterized in that The top side of the ink storage box is also provided with a tank cover for adding ink into the box body.

5. A control system for inking a gravure printing machine according to claim 1, It is characterized in that The reflux leakage hole is a 200mm*20mm rectangular strip hole.

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