A coloring device for a gravure printing machine

Abstract

This invention discloses a coloring device for a gravure printing machine, relating to the field of gravure printing machines. Through the coordination of an adjustment mechanism, a quick-release transmission mechanism, and a coloring roller, this invention achieves significant advantages. First, the device enables multi-dimensional adjustment of the coloring roller via an electric push rod and motor, including flexible adjustment in the left-right, up-down, and forward-backward directions. This makes the contact position between the coloring roller and the printing roller more precise, ensuring uniformity and stability of coloring and improving printing quality. Second, the quick-release transmission mechanism allows for rapid disassembly and assembly of the coloring roller without the need for complex tools, facilitating daily cleaning and replacement, reducing downtime, lowering operational difficulty, and improving maintenance efficiency. Furthermore, the motor drives the connecting shaft and coloring roller via a synchronous belt, ensuring smooth and reliable transmission and avoiding the noise and wear caused by direct gear meshing in traditional structures, thus extending the device's service life.

Description

Technical Field

[0001] This invention relates to the field of gravure printing presses, and more particularly to a coloring device for a gravure printing press. Background Technology

[0002] A coloring device for a gravure printing machine, disclosed in Chinese Patent Publication No. CN219583735U, includes a printing plate cylinder, an ink trough, paper, and a pressure cylinder. One side of the printing plate cylinder is equipped with a coloring device for cleaning the ink coating during printing and after prolonged use, ensuring more even ink distribution. When coloring paper using the printing plate cylinder, a doctor blade on one side scrapes ink from the surface of the printing plate cylinder to ensure printing quality. However, during scraping, some ink may detach and fall into a guide plate at the lower end for flow buffering, preventing it from falling directly into the ink trough and splashing onto the printing plate cylinder or paper, thus affecting the coloring quality. After prolonged use, residual ink may solidify on the doctor blade, affecting its use. By activating an electric lifting rod, the doctor blade is moved to contact the blade scraper and cleaning sponge to clean the blade, ensuring subsequent ink scraping quality and improving the practicality of the coloring device.

[0003] In traditional gravure printing presses, the coloring device typically consists of an ink trough and a coloring roller. The coloring roller transfers ink from the ink trough to the printing roller to color the substrate. However, existing coloring devices have the following shortcomings: First, the relative position between the coloring roller and the printing roller largely depends on manual adjustment, which is simplistic and imprecise, easily leading to uneven coloring and affecting print quality. Second, the coloring roller requires regular cleaning or replacement after long-term use, but traditional devices often use a fixed connection structure, making disassembly cumbersome and time-consuming, severely impacting production efficiency. Third, some transmission methods use direct gear meshing, which easily generates significant noise and wear during operation, reducing the stability and lifespan of the device. Summary of the Invention

[0004] Therefore, in order to overcome the above-mentioned shortcomings, the present invention provides a coloring device for a gravure printing machine.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a coloring device for a gravure printing machine, including an ink trough, a coloring roller installed above the ink trough, a support plate connected to the right side of the coloring roller, a support base passing through the right side of the support plate via a connecting shaft, and an adjustment mechanism connected to the left side of the coloring roller via a transmission quick-release mechanism. The transmission quick-release mechanism enables quick connection between the coloring roller and the transmission quick-release mechanism, and the adjustment mechanism enables position adjustment of the coloring roller.

[0006] Preferably, the adjustment mechanism includes a base for support, a first motor located at the top right front end of the base, a drive gear connected to the right output shaft of the first motor, a driven gear meshing with the back of the drive gear, a support plate located at the right rear end of the base, a support block installed on the right side of the base, an adjustment shaft passing through the driven gear, a connector connected to the left side of the adjustment shaft, a guide member located at the left end of the connector, and an electric push rod installed at the top left end of the base and connected to the guide member by the push rod.

[0007] Preferably, the driven gear is placed between the support plate and the support block, the middle of the driven gear is penetrated by the adjusting shaft, and the right side of the adjusting shaft penetrates the support block and connects to the transmission quick-release mechanism.

[0008] Preferably, the connector is formed by fixing a cylinder at the right end and a disc at the left end. A circular groove is opened at the left end of the guide, and the disc is movably embedded in the circular groove. A protruding post is fixed at the right end of the guide, and the protruding post is placed on the outside of the cylinder.

[0009] Preferably, the adjusting shaft has grooves at both ends, and the driven gear has protrusions at both ends of the inner through hole corresponding to the grooves.

[0010] Preferably, the transmission quick-release mechanism includes a connecting mechanism connected to the coloring roller on the right, a connecting plate connected to the connecting mechanism and connected to the adjusting shaft on the left, a transmission box located at the upper left end of the connecting mechanism, and a second motor installed on the left side of the transmission box.

[0011] Preferably, the upper end of the transmission box is provided with a drive pulley that connects to the output shaft of the second motor. The outer side of the drive pulley is connected to a driven pulley via a synchronous belt. The lower end of the driven pulley is provided with a connecting shaft, and the right end of the connecting shaft is connected to a connecting mechanism.

[0012] Preferably, the connecting mechanism includes a fixed cylinder connected to the coating roller on the right side, a fixed rod located at the right end inside the fixed cylinder, a sliding sleeve located inside the fixed cylinder, a spring sleeved on the outside of the fixed rod, a lever located at the top of the sliding sleeve and penetrating through the fixed cylinder, a limiting ball located at the upper and lower positions of the left end of the fixed cylinder, and a connecting rod fixed to the left side of the fixed cylinder. The left end of the spring abuts against the left end of the fixed rod, and the right end abuts against the sliding sleeve sleeved on the outside of the fixed rod. A strip groove is opened at the upper left end of the fixed cylinder, and the lever is movably embedded in the strip groove.

[0013] Preferably, the upper and lower ends of the connecting shaft are concave, the inner side of the docking rod matches the shape of the connecting shaft, and the docking rod is connected to the connecting shaft.

[0014] Preferably, the lower end of the connecting plate has a through hole, and the right end of the through hole has a slot, with a limiting ball corresponding to the middle of the slot.

[0015] The beneficial effects of this invention are:

[0016] This invention, through the coordination of the adjustment mechanism, the quick-release transmission mechanism, and the coloring roller, achieves significant beneficial effects. First, the device can achieve multi-dimensional adjustment of the coloring roller via an electric push rod and motor, including flexible adjustment in the left-right, up-down, and forward-backward directions. This makes the contact position between the coloring roller and the printing roller more precise, thereby ensuring the uniformity and stability of the coloring and improving printing quality. Second, the quick-release transmission mechanism allows the coloring roller to be quickly disassembled and assembled without the aid of complex tools. This facilitates daily cleaning and replacement, reduces downtime, lowers the difficulty of operation, and improves maintenance efficiency. In addition, the motor drives the connecting shaft and the coloring roller to rotate via a synchronous belt, ensuring smooth and reliable transmission. This avoids the noise and wear caused by direct gear meshing in traditional structures and extends the service life of the device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the coating roller connection structure of the present invention;

[0019] Figure 3 This is a schematic diagram of the adjustment mechanism structure of the present invention;

[0020] Figure 4 This is a schematic diagram of the adjusting shaft connection structure of the present invention;

[0021] Figure 5 This is a schematic diagram of the transmission quick-release mechanism of the present invention;

[0022] Figure 6 This is a schematic diagram of the transmission box structure of the present invention;

[0023] Figure 7 This is a schematic diagram of the connection mechanism structure of the present invention.

[0024] The components include: ink trough-1, coloring roller-2, support plate-3, connecting shaft-4, support base-5, transmission quick release mechanism-6, adjustment mechanism-7, base-71, first motor-72, driving gear-73, driven gear-74, support plate-75, support block-76, adjustment shaft-77, connecting part-78, guide part-79, electric push rod-710, connecting mechanism-61, connecting plate-62, transmission box-63, second motor-64, driving pulley-631, synchronous belt-632, driven pulley-633, connecting shaft-634, fixed cylinder-611, fixed rod-612, sliding sleeve-613, spring-614, lever-615, limit ball-616, docking rod-617, and slot-62a. Detailed Implementation

[0025] To further explain the technical solution of the present invention, a detailed description is provided below through specific embodiments.

[0026] Please see Figure 1 and Figure 2 This invention provides a coloring device for a gravure printing machine, including an ink trough 1 for coloring, a coloring roller 2 disposed above the ink trough 1, the right side of the coloring roller 2 being rotatably connected to a support plate 3, the middle of the right side of the support plate 3 being connected to a support base 5 via a connecting shaft 4, the middle of the support base 5 having a through hole, the connecting shaft 4 passing through the through hole in the middle of the support base 5, the left side of the coloring roller 2 being connected to a transmission quick-release mechanism 6, the left side of the transmission quick-release mechanism 6 being connected to an adjustment mechanism 7, the coloring roller 2 being able to be quickly connected to the adjustment mechanism 7 via the transmission quick-release mechanism 6, and the adjustment mechanism 7 being able to adjust the position of the coloring roller 2.

[0027] Please see Figure 3 and Figure 4 The adjusting mechanism 7 includes a base 71 for support. A first motor 72 is located at the top right front end of the base 71. The output shaft on the right side of the first motor 72 is connected to a drive gear 73. The back of the drive gear 73 meshes with a driven gear 74. A support plate 75 is vertically welded to the right rear end of the base 71. A support block 76 is fixed to the right rear end of the base 71. The driven gear 74 is placed between the support plate 75 and the support block 76. An adjusting shaft 77 passes through the middle of the driven gear 74, and the right side of the adjusting shaft 77 passes through the support block 76 and connects to the transmission quick-release mechanism 6. The left side of the adjusting shaft 77 passes through the support plate. 75 Connecting connector 78, the left end of connector 78 is movably embedded into guide 79. Connector 78 is fixed by a cylinder at the right end and a disc at the left end. Guide 79 has a groove at the left end, and the disc is movably embedded into the groove. Guide 79 has a protruding post fixed at the right end, which is placed outside the cylinder. The left side of guide 79 is hinged to the right end of the push rod of electric push rod 710. The left end of electric push rod 710 is connected to the left rear end of the top of base 71. Adjusting shaft 77 has grooves at both the upper and lower ends. The driven gear 74 has protrusions at both the upper and lower ends of the inner through hole corresponding to the grooves.

[0028] Please see Figures 5-7 The transmission quick-release mechanism 6 includes a connecting mechanism 61 connected to the coloring roller 2 on the right side, a connecting plate 62 connected to the left side of the connecting mechanism 61, an adjusting shaft 77 connected to the middle of the left side of the connecting plate 62, a transmission box 63 fixed to the upper left side of the connecting plate 62, and a second motor 64 installed on the upper left side of the transmission box 63.

[0029] The upper end of the transmission box 63 is provided with a drive pulley 631 that connects to the output shaft of the second motor 64. The outer side of the drive pulley 631 rotates synchronously with the driven pulley 633 through a synchronous belt 632. The middle part of the driven pulley 633 is connected to a connecting shaft 634, and the upper and lower ends of the connecting shaft 634 are concave.

[0030] The connecting mechanism 61 includes a fixed cylinder 611 for connecting the coating roller 2. The right end of the fixed cylinder 611 is threadedly connected to the fixed rod 612. A spring 614 is sleeved on the outside of the fixed rod 612. The left end of the spring 614 abuts against the left end of the fixed rod 612, and the right end abuts against the sliding sleeve 613 sleeved on the outside of the fixed rod 612. The outer side of the sliding sleeve 613 fits against the inner side of the fixed cylinder 611. A strip-shaped groove is opened at the upper left end of the fixed cylinder 611. A lever 615 is movably embedded in the strip-shaped groove. The lower end of the lever 615 engages with the sliding sleeve 613. The sliding sleeve 613 has a concave circular groove on its outer left end, and the left end of the fixed cylinder 611 is movably embedded with a limiting ball 616. The sliding sleeve 613 can push out the limiting ball 616 by moving. A connecting rod 617 is fixed on the left side of the fixed cylinder 611. The inner side of the connecting rod 617 matches the shape of the connecting shaft 634, and the two can be inserted. A through hole is opened at the lower end of the connecting plate 62. A slot 62a is opened at the right end of the through hole. The middle of the slot 62a corresponds to the limiting ball 616, which facilitates the insertion of the limiting ball 616.

[0031] The specific implementation process is as follows:

[0032] Install the entire device into the gravure printing machine. The top of the coloring roller 2 needs to correspond to the printing roller. During the rotation of the coloring roller 2, it can come into contact with the ink in the ink trough 1, and then come into contact with the printing roller to start coloring.

[0033] If the position of the printing roller needs to be adjusted to achieve uniform coloring, the electric push rod 710 can be activated. The push rod on the right side of the electric push rod 710 can pull the connecting part 78 through the guide 79, thereby causing the adjusting shaft 77 to move accordingly. The adjusting shaft 77 drives the transmission quick release mechanism 6 to move the coloring roller 2 left and right, thereby achieving left and right position adjustment. If the vertical or front and back position of the coloring roller 2 needs to be adjusted, the first motor 72 is activated. The first motor 72 drives the drive gear 73 to rotate. During the rotation of the drive gear 73, the driven gear 74 rotates accordingly. The driven gear 74 drives the adjusting shaft 77 to rotate the transmission quick release mechanism 6, thereby achieving position adjustment of the coloring roller 2.

[0034] The second motor 64 is started to work. The second motor 64 drives the drive pulley 631 to rotate. During the rotation of the drive pulley 631, the driven pulley 633 is rotated through the synchronous belt 632. During the rotation of the driven pulley 633, the connecting shaft 634 connected in the middle causes the transmission quick release mechanism 6 to rotate, thereby realizing the rotation of the coloring roller 2.

[0035] If it is necessary to quickly disassemble the coloring roller 2, the lever 615 can be pulled, and the lever 615 can move the sliding sleeve 613. During the movement, the limiting ball 616 loses its limit and falls back into the fixed cylinder 611. Then, the fixed cylinder 611 is pulled, so that the connecting shaft 634 disengages from the docking rod 617, and the quick disassembly is completed.

[0036] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A colouring device for a gravure printing machine, characterised in that: The application relates to a color coating device, which comprises an ink groove, a color coating roller mounted above the ink groove, a support disc connected to the right side of the color coating roller, a support seat penetrated by a connecting shaft at the right side of the support disc, a transmission quick-release mechanism connected to the left side of the color coating roller through a transmission quick-release mechanism, and an adjusting mechanism connected to the left side of the color coating roller through the transmission quick-release mechanism. The transmission quick-release mechanism comprises a connecting mechanism connected to the right side of the color coating roller, a connecting disc connected to the left side of the adjusting shaft and connected to the connecting mechanism, a transmission box arranged at the left side of the connecting mechanism, and a second motor arranged at the left side of the transmission box. The connecting mechanism comprises a fixed cylinder connected to the right side of the color coating roller, a fixed rod arranged at the right end in the fixed cylinder, a sliding sleeve arranged in the fixed cylinder, a spring sleeved outside the fixed rod, a push rod arranged at the top of the sliding sleeve and penetrating the fixed cylinder at the top, limiting balls arranged at the upper and lower positions of the left end of the fixed cylinder, and a butt joint rod fixed to the left side of the fixed cylinder.

2. An inking unit for a photogravure printing machine according to claim 1, characterized in that: The butt joint rod is fixed by a right-end cylinder and a left-end disc, a circular groove is arranged at the left end of the guide piece, the disc is movably embedded in the circular groove, a convex column is fixed to the right end of the guide piece, and the convex column is arranged outside the cylinder.

3. An inking unit for a photogravure printing machine according to claim 2, characterized in that: Recesses are arranged at the upper and lower ends of the adjusting shaft, and convex parts are arranged at the upper and lower ends of the through hole in the inner side of the driven gear and correspond to the recesses.

4. The colouring device of the intaglio printing press according to claim 1, characterized in that: A driving pulley connected to the output shaft of the second motor is arranged at the inner upper end of the transmission box, a driven pulley is connected to the outer side of the driving pulley through a synchronous belt, an engaging shaft is arranged at the inner lower end of the driven pulley, and the engaging shaft is connected to the connecting mechanism at the right end.

5. An inking device for a photogravure printing machine according to claim 4, characterized in that: The engaging shaft is concave at the upper and lower ends, the shape of the engaging shaft matches the shape of the butt joint rod, and the butt joint rod is connected to the engaging shaft.

6. The colouring device of the intaglio printing press according to claim 1, characterized in that: A through hole is arranged at the lower end of the connecting disc, a clamping groove is arranged at the right end of the through hole, and the clamping groove corresponds to the limiting balls.

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