CN114030290B

CN114030290B - Printing machine printing ink centralized control device

Info

Publication number: CN114030290B
Application number: CN202111239448.5A
Authority: CN
Inventors: 孙永翔
Original assignee: Hubei Xiefeng Printing Co ltd
Current assignee: Hubei Xiefeng Printing Co ltd
Priority date: 2021-10-25
Filing date: 2021-10-25
Publication date: 2023-01-24
Anticipated expiration: 2041-10-25
Also published as: CN114030290A

Abstract

The invention discloses a printing ink centralized control device of a printing machine, which relates to the field of printing and aims to solve the problem that the device is stopped due to inconvenient frequent feeding and inconsistent ink consumption progress in the printing process.

Description

Printing ink centralized control device of printing machine

Technical Field

The invention relates to an ink control device, in particular to an ink centralized control device of a printing machine, and belongs to the field of printing.

Background

A printer is a machine that prints text and images. Modern printing presses generally consist of mechanisms for plating, inking, stamping, feeding (including folding) and the like. The working principle is as follows: the characters and images to be printed are made into printing plate, then it is mounted on the printing machine, then the ink is coated on the position of the characters and images on the printing plate by manual or printing machine, then it is directly or indirectly transferred on the paper or other printing material (such as textile, metal plate, plastics, leather, wood plate, glass and ceramic) so as to reproduce the same printed matter as the printing plate. The invention and the development of the printing machine play an important role in the propagation of human civilization and culture. In terms of printing machine automation, technologies such as networking, production integration, digital work flow, linking with Management Information System (MIS), and the like have become important points of development. The CP2000 automatic control system of the heidelberg company has the functions of presetting, regulating and controlling, and fault diagnosis for each working link of the whole machine such as paper feeding, paper conveying and guiding, inking, water conveying, plate changing, registering, cleaning, drying, glazing and coating, powder spraying, paper collecting, and the like, and also has the functions of realizing networking of all production procedures of a printing enterprise, transmitting prepress image processing data (CIP 3/PPF or CIP4/JDF data) on line, and the like. In the new century, most offset press manufacturers developed corresponding DI digital presses. In addition, in order to meet the demand of people for high-grade color printed matters, the development trend that multi-color set double-sided printing and additional on-line post-printing processing functions of 8-color sets and even 10-color sets become various sheet-fed offset printing machines (including small offset printing machines, DI direct plate-making machines and large offset printing machines) is well-developed, and the printing machines of the type begin to occupy a part of markets originally belonging to the roll paper printing machines.

The printing machines present today have the following disadvantages:

1. the printing equipment taking the Heidelberg printer as an example is mainly provided with the ink box at the top, the ink box is usually small, ink needs to be added frequently, and at the moment, workers need to add ink manually, which is very inconvenient.

2. The printing equipment taking Heidelberg multicolor printing machine as an example is generally provided with a plurality of single-color printing mechanisms, each single-color printing mechanism is responsible for printing one color, the ink consumption conditions of different colors are different, once the ink of a certain color is consumed, the device can automatically stop running, the materials for printing other color blocks and printing the color blocks with the color lack at the moment become defective products, the quality of products is influenced by secondary printing, and the ink cannot be automatically supplemented to ensure the smoothness of the working procedure.

Disclosure of Invention

The invention aims to provide a printing machine ink centralized control device, which aims to solve the problems that the existing printing machine ink box provided in the background needs frequent manual ink adding at the top, is very inconvenient, has different ink consumption conditions of different colors, and can automatically stop running once the ink of a certain color is consumed, other color blocks being printed and materials printing the color blocks with the color lack at the moment become defective products, secondary printing influences the quality of products, and the ink cannot be automatically supplemented to ensure the smoothness of the process.

In order to achieve the above purpose, the invention provides the following scheme:

the utility model provides a printing machine printing ink centralized control device, includes the printing ink printing machine body, the printing ink printing machine body includes at least one monochromatic printing mechanism, the top of monochromatic printing mechanism is equipped with ink horn, ink horn's top is equipped with into china ink mouth, the black mouthful sealing connection of advancing of monochromatic printing mechanism has printing ink control mechanism, printing ink control mechanism includes at least one ink supply unit, the ink supply unit includes the vertical pneumatic cylinder up of telescopic link, one side of pneumatic cylinder is equipped with deposits the bucket, the end connection of the telescopic link of pneumatic cylinder has the installation piece, be equipped with the control box on the installation piece, just the control box is located deposit the top of bucket, be equipped with the controller in the control box, the bottom of control box is equipped with two downwardly extending extremely perpendicularly deposit the connecting rod in the bucket, the lower extreme of connecting rod is connected with the clamp plate, the clamp plate is located deposit in the bucket, the top of clamp plate is equipped with the printing ink pump, just the input of printing ink pump is perpendicular down and runs through the clamp plate, the input of printing ink pump is equipped with a feed cylinder, the upper and lower interval is equipped with first level sensor and second level sensor on the inner wall of ink horn the inner wall of the third level sensor, the liquid level sensor is connected with the liquid level sensor, the liquid level sensor.

Preferably, the first liquid level sensor is close to the top of the ink box, the second liquid level sensor is close to the bottom of the ink box, and a gap is formed between the second liquid level sensor and the bottom of the ink box.

Preferably, a gap is reserved between the measuring end of the third liquid level sensor and the port of the feeding barrel, and a gap is reserved between the measuring end of the fourth liquid level sensor and the bottom of the storage barrel.

More preferably, the gap between the measuring end of the third liquid level sensor and the port of the feeding cylinder is equal to the gap between the measuring end of the fourth liquid level sensor and the bottom of the storage barrel, and the distance between the port of the feeding cylinder and the bottom of the storage barrel is not less than the distance output by the hydraulic cylinder.

Preferably, a display screen and a control switch are arranged on the control box, and the display screen and the control switch are respectively electrically connected with the controller.

Preferably, a connection hose is hermetically connected between the ink inlet and the output end of the ink pump, the connection hose is routed above the ink printer body through a plurality of fasteners, an inlet check valve is arranged at the input end of the connection hose, an outlet check valve is arranged at the output end of the connection hose, the inlet check valve allows a medium to flow from the output end of the ink pump to the input end of the connection hose, and the outlet check valve allows the medium to flow from the output end of the connection hose to the ink inlet.

Preferably, a fixing frame for fixing the feeding cylinder is arranged between the upper part of the side surface of the feeding cylinder and the bottom of the control box.

Preferably, the both sides of installation piece are equipped with the horizontally pterygoid lamina, are equipped with the color palette on the pterygoid lamina of one side, the top of installation piece is inlayed and is equipped with the printing ink tap, the output of printing ink tap just is located the top of color palette, the output of ink pump is equipped with coupling hose, and passes through coupling hose sealing connection has the printing ink distributor, one of them output of printing ink distributor passes through coupling hose with the input sealing connection of printing ink tap, another output of printing ink distributor pass through coupling hose with advance china ink mouth sealing connection.

Compared with the prior art, the invention has the beneficial effects that:

(1) The invention provides a printing machine ink centralized control device, which is convenient to add ink by adding ink through an ink supply unit of an ink control mechanism, and ink does not need to be manually carried to be added from an ink inlet at the upper end.

(2) The invention provides a printing ink centralized control device of a printing machine, wherein each ink box is provided with a second liquid level sensor for continuous monitoring, once the liquid level of printing ink is lower than the position of the second liquid level sensor, an ink supply unit of a corresponding ink control mechanism is controlled to add the printing ink, when the liquid level returns to the position of a first liquid level sensor again, the ink box is filled, the adding operation is stopped, the printing ink can always meet the normal printing, the device cannot stop running due to the fact that the printing ink is used up, and the completeness of a product is guaranteed.

Drawings

Fig. 1 is a schematic view of the mounting structure of the present invention.

Fig. 2 is a schematic cross-sectional view of an ink supply unit of the present invention.

Fig. 3 is an external structural diagram of the ink supply unit of the present invention.

Fig. 4 is a schematic diagram of a control structure of the present invention.

Fig. 5 is a schematic plan view of a partial structure of an ink supply unit according to the present invention.

In the figure: 1. an ink printer body; 101. a monochrome printing mechanism; 1011. an ink cartridge; 1012. an ink inlet; 2. a first liquid level sensor; 3. a second liquid level sensor; 4. an ink control mechanism; 5. an ink supply unit; 6. a hydraulic cylinder; 7. a storage barrel; 8. a control box; 801. a control switch; 802. a display screen; 803. a controller; 9. mounting blocks; 901. a wing plate; 10. a connecting hose; 11. an outlet check valve; 12. an inlet check valve; 13. an ink pump; 14. pressing a plate; 15. a fastener; 16. a connecting rod; 17. a feeding cylinder; 18. a fixed mount; 19. a third liquid level sensor; 20. a fourth liquid level sensor; 21. a fixed seat; 22. an ink dispenser; 23. an ink faucet; 24. a palette.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 3, in this embodiment, an ink centralized control device for a printing machine includes an ink printing machine body 1, taking a heidelberg multicolor printing machine as an example, where the ink printing machine body 1 includes at least one monochromatic printing mechanism 101, an ink cartridge 1011 is disposed on a top of the monochromatic printing mechanism 101, an ink inlet 1012 is disposed on a top of the ink cartridge 1011, an ink control mechanism 4 is hermetically connected to the ink inlet 1012 of the monochromatic printing mechanism 101, the ink control mechanism 4 includes at least one ink supply unit 5 to facilitate a color change operation, there is only one ink supply unit 5 that operates simultaneously in the ink control mechanism 4, since a printing color sequence may be adjusted according to different products, there are multiple ink supply units 5, different ink supply units 5 may be selectively opened to perform printing of different colors, and when there is only one ink supply unit 5, except for changing the color of the printing ink, the printing ink control mechanism 4 can also be directly changed, different printing ink changing units 4 are connected to the ink inlet 1012, the ink supply unit 5 comprises a hydraulic cylinder 6 with a vertically upward vertical telescopic rod, the height can be conveniently adjusted according to the storage condition of the printing ink materials, the continuous output of the printing ink is ensured, a storage barrel 7 is arranged on one side of the hydraulic cylinder 6 and used for storing the printing ink to be added, an installation block 9 is arranged at the end part of the telescopic rod of the hydraulic cylinder 6, a control box 8 is arranged on the installation block 9 and positioned above the storage barrel 7, a controller 803 is arranged in the control box 8 and used for controlling the operation, two connecting rods 16 extending downwards into the storage barrel 7 are vertically arranged at the bottom of the control box 8, a pressing plate 14 is arranged at the tail end of each connecting rod 16, the pressing plate 14 is positioned in the storage barrel 7, clamp plate 14 is the square, and clamp plate 14's center pin and the center pin coincidence of depositing bucket 7, the bottom of connecting rod 16 is fixed the same limit of clamp plate 14 and the center pin symmetry about clamp plate 14, clamp plate 14's top is equipped with ink pump 13, just ink pump 13's input is perpendicular down and runs through clamp plate 14, ink pump 13's input is equipped with feed cylinder 17, makes things convenient for the feeding, feed cylinder 17 just feed cylinder 17's side upper portion with be equipped with mount 18 between the bottom of control box 8, mount 18 is the L shape, and the vertical section of mount 18 is located clamp plate 14's homonymy with connecting rod 16, and the vertical section of mount 18 passes through from the clearance between clamp plate 14's avris and the inner wall of depositing bucket 7, and its top is fixed on the bottom of control box 8, stability when reinforcing means absorbs ink.

The upper and lower spaced first level sensor 2 and second level sensor 3 that are equipped with on the inner wall of ink horn 1011, first level sensor 2 is located the top of second level sensor 3, first level sensor 2 is close to the top of ink horn 1011, second level sensor 3 is close to the bottom of ink horn 1011, just second level sensor 3 with be equipped with the clearance between the bottom of ink horn 1011, when guaranteeing to supply ink, the interior printing ink of ink horn 1011 still enough monochromatic printing mechanism 101 operation a period, first level sensor 2 with second level sensor 3 with in the control box 8 controller 803 electric connection, controller 803 with the switch electric connection of ink pump 13, the first liquid level sensor 2 and the second liquid level sensor 3 are used for monitoring the change condition of the liquid level of ink in the ink box 1011 and automatically adding ink, along with the consumption of the ink, the liquid level of the ink is gradually reduced, when the liquid level of the ink is reduced to be below the second liquid level sensor 3, namely the liquid level is not detected by the second liquid level sensor 3, the second liquid level sensor 3 sends a signal to the controller 803, the controller 803 controls to start the ink pump 13 to replenish the ink, along with the replenishment of the ink, the liquid level of the ink is gradually increased, when the liquid level of the ink is increased to be close to the top of the ink box 1011, namely the first liquid level sensor 2 monitors the liquid level, the first liquid level sensor 2 sends a signal to the controller 803, the controller 803 controls to stop the ink replenishment of the ink pump 13, accidents caused by excessive replenishment are prevented, and the automatic ink replenishment operation is completed.

The lateral wall bottom of feed cylinder 17 is equipped with fixing base 21, be equipped with the perpendicular decurrent third level sensor 19 of measuring end in the fixing base 21, just the measuring end of third level sensor 19 leaves the clearance apart from between the port of feed cylinder 17, the inner wall bottom level of depositing bucket 7 inlays and is equipped with fourth level sensor 20, just the measuring end of fourth level sensor 20 leaves the clearance apart from between the bottom of depositing bucket 7, third level sensor 19 with fourth level sensor 20 with in the control box 8 controller 803 electric connection, controller 803 with the switch electric connection of pneumatic cylinder 6, the measuring end of third level sensor 19 apart from the clearance between the port of feed cylinder 17 equals with the measuring end of fourth level sensor 20 apart from the clearance between the bottom of depositing bucket 7, the distance between the port of the feeding cylinder 17 and the bottom of the storage barrel 7 is not less than the distance output by the hydraulic cylinder 6, the third liquid level sensor 19 and the fourth liquid level sensor 20 are used for controlling the operation of the hydraulic cylinder 6 to ensure that the raw material is sufficient in the ink replenishing process, when the third liquid level sensor 19 is not in contact with the ink liquid level and cannot monitor the liquid level, the third liquid level sensor 19 sends a signal to the controller 803, the controller 803 controls the hydraulic cylinder 6 to retract so that the feeding cylinder 17 installed on the measuring end of the ink pump 13 synchronously moves downwards until the third liquid level sensor 19 is in contact with the ink liquid level again and monitors the liquid level, at the moment, the third liquid level sensor 19 sends a signal to the controller 803, the controller 803 controls the hydraulic cylinder 6 to stop at the current position to ensure that the input end of the feeding cylinder 17 is always immersed in the ink, and when the fourth liquid level sensor 20 cannot detect the liquid level, namely, the ink in the storage barrel 7 is short, the fourth liquid level sensor 20 sends a signal to the controller 803, the controller 803 can be matched with a flash prompter, a buzzer or a voice prompter to warn that the ink is insufficient, the ink needs to be added, at the moment, the whole equipment is manually shut down, the hydraulic cylinder 6 is controlled by the control switch 801 to output, the feeding barrel 17 is lifted to a proper height, and then the ink is supplemented between the feeding barrel 17 and the storage barrel 7.

The models of the first liquid level sensor 2, the second liquid level sensor 3, the third liquid level sensor 19 and the fourth liquid level sensor 20 are the same, touch liquid level sensors are adopted, and EM500 series input liquid level sensors can be adopted.

The controller 803 may be a commercially available PLC controller.

Be equipped with display screen 802 and control switch 801 on the control box 8, the display screen 802 with control switch 801 respectively with in the control box 8 controller 803 electric connection, control switch 801 includes the output switch of pneumatic cylinder 6, switch and the speed governing switch of ink pump 13, facilitates the use, and the display screen is used for showing the speed of ink pump 13 and the signal feedback of each level sensor monitoring and handles the status data that becomes.

Advance black mouth 1012 with sealing connection has coupling hose 10 between the output of ink pump 13, coupling hose 10 follows through a plurality of fasteners 15 walk the line in 1 top of ink printing machine body, conveniently change different black mouth 1012, facilitate the use, fastener 15 can use on the market suitable prevent walking line metal anchor clamps or buckle clip, easy to assemble and arrange, coupling hose 10's input department is equipped with import check valve 12, coupling hose 10's output department is equipped with export check valve 11, import check valve 12 allows the medium to follow ink pump 13's output court the input of coupling hose 10 flows, export check valve 11 allows the medium to follow coupling hose 10's output court black mouth 1012 flows, prevents that the backward flow from causing equipment to damage, confirms the flow direction of printing ink.

The two sides of the mounting block 9 are provided with horizontal wing plates 901, the wing plate 901 on one side is provided with a color mixing tray 24, the top of the mounting block 9 is embedded with an ink faucet 23, the output end of the ink faucet 23 is just positioned above the color mixing tray 24, the output end of the ink pump 13 is provided with a connecting hose 10, and is hermetically connected with an ink distributor 22 through the connecting hose 10, one output end of the ink distributor 22 is hermetically connected with the input end of the ink faucet 23 through the connecting hose 10, and the other output end of the ink distributor 22 is hermetically connected with the ink inlet 1012 through the connecting hose 10, so that whether the output is normal or not can be monitored anytime and anywhere, no deviation exists in color, and adjustment and use in the printing process are facilitated.

The working principle of the invention is as follows: the invention provides a printing machine ink centralized control device, which adds ink through an ink supply unit 5 of an ink control mechanism 4, is convenient to add, and does not need to manually carry the ink to be added from an upper ink inlet 1012; each ink box 1011 is provided with a second liquid level sensor 3 for continuous monitoring, once the liquid level of the ink is lower than the position of the second liquid level sensor 3, the ink supply unit 5 of the corresponding ink control mechanism 4 is controlled to add the ink, the first liquid level sensor 2 and the second liquid level sensor 3 are used for monitoring the change condition of the liquid level of the ink in the ink box 1011 to automatically add the ink, the liquid level of the ink is gradually reduced along with the consumption of the ink, when the liquid level of the ink is reduced below the second liquid level sensor 3, namely the liquid level is not detected by the second liquid level sensor 3, the second liquid level sensor 3 sends a signal to the controller 803, the controller 803 controls the ink pump 13 to be started for ink supplement, along with the ink supplement, the liquid level of the ink is gradually increased, when the liquid level of the ink is increased to be close to the top of the ink box 1011, namely the first liquid level sensor 2 monitors the liquid level, the first liquid level sensor 2 sends a signal to the controller 803, the controller 803 controls the ink pump 13 to be turned off to stop ink replenishment, so as to prevent accidents caused by excessive replenishment and complete automatic monitoring of ink replenishment, the third liquid level sensor 19 and the fourth liquid level sensor 20 are used for controlling the operation of the hydraulic cylinder 6 to ensure that raw materials are sufficient in the ink replenishment process, when the third liquid level sensor 19 does not contact with the ink liquid surface and cannot monitor the liquid level, the third liquid level sensor 19 sends a signal to the controller 803, the controller 803 controls the hydraulic cylinder 6 to retract, so that the feeding cylinder 17 installed at the input end of the ink pump 13 synchronously moves downwards until the third liquid level sensor 19 contacts again and monitors the liquid level, at the moment, the third liquid level sensor 19 sends a signal to the controller 803, the controller 803 controls the hydraulic cylinder 6 to stop at the current position, and ensures that the input end of the feeding cylinder 17 is always immersed in the ink, when fourth level sensor 20 can not detect the liquid level, deposit the printing ink in the bucket 7 soon not enough promptly, fourth level sensor 20 sends signal for controller 803, controller 803 can cooperate the flash of light prompting device, buzzing or voice prompt device warning printing ink is not enough, need add printing ink, shut down holistic equipment by the manual work this moment, and utilize control switch 801 control pneumatic cylinder 6 to export, promote behind the suitable height with feed cylinder 17, supply printing ink between the clearance of feed cylinder 17 and storage bucket 7, guarantee that printing ink can satisfy normal printing all the time, the device can not stop the operation because of printing ink is used up, guarantee the degree of completion of product.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a printing machine printing ink centralized control device, includes printing ink machine body (1), printing ink machine body (1) includes at least one monochromatic printing mechanism (101), the top of monochromatic printing mechanism (101) is equipped with ink horn (1011), the top of ink horn (1011) is equipped with into china ink mouth (1012), a serial communication port, the income china ink mouth (1012) sealing connection of monochromatic printing mechanism (101) has printing ink control mechanism (4), printing ink control mechanism (4) includes at least one ink supply unit (5), ink supply unit (5) includes the vertical pneumatic cylinder (6) up of telescopic link, one side of pneumatic cylinder (6) is equipped with deposits bucket (7), the end connection of the telescopic link of pneumatic cylinder (6) has installation piece (9), be equipped with control box (8) on installation piece (9), just control box (8) are located deposit the top of bucket (7), be equipped with controller (803) in control box (8), the bottom of control box (8) is equipped with two perpendicularly and extends down to deposit connecting rod (16) in bucket (7), connecting rod (16) lower extreme (14) of depositing in the clamp plate (14), clamp plate (14) top is equipped with press plate (13), the input end of the ink pump (13) is vertically downward and penetrates through the pressing plate (14), the input end of the ink pump (13) is provided with a feeding cylinder (17), a first liquid level sensor (2) and a second liquid level sensor (3) are arranged on the inner wall of the ink box (1011) at an upper interval and a lower interval, the bottom of the side wall of the feeding cylinder (17) is provided with a fixed seat (21), a third liquid level sensor (19) with a vertically downward measuring end is arranged in the fixed seat (21), a fourth liquid level sensor (20) is horizontally embedded at the bottom of the inner wall of the storage barrel (7), and the first liquid level sensor (2), the second liquid level sensor (3), the third liquid level sensor (19), the fourth liquid level sensor (20), the ink pump (13) and the hydraulic cylinder (6) are respectively and electrically connected with the controller (803);

the sealing connection has connecting hose (10) between the output of advancing ink mouth (1012) and ink pump (13), connecting hose (10) are followed through a plurality of fasteners (15) the line is walked above the ink printing machine body (1), the input end of connecting hose (10) is equipped with import check valve (12), the output end of connecting hose (10) is equipped with export check valve (11), import check valve (12) allow the medium to flow from the output of ink pump (13) towards the input of connecting hose (10), export check valve (11) allow the medium to flow from the output of connecting hose (10) towards advance ink mouth (1012);

the both sides of installation piece (9) are equipped with horizontally pterygoid lamina (901), are equipped with color palette (24) on pterygoid lamina (901) of one side, the top of installation piece (9) is inlayed and is equipped with printing ink tap (23), the output of printing ink tap (23) just is located the top of color palette (24), the output of printing ink pump (13) is equipped with coupling hose (10), and passes through coupling hose (10) sealing connection has printing ink distributor (22), one of them output of printing ink distributor (22) passes through coupling hose (10) with the input sealing connection of printing ink tap (23), another output of printing ink distributor (22) pass through coupling hose (10) with advance china ink mouth (1012) sealing connection.

2. The centralized ink control device of a printing press according to claim 1, wherein the first liquid level sensor (2) is close to the top of the ink cartridge (1011), the second liquid level sensor (3) is close to the bottom of the ink cartridge (1011), and a gap is provided between the second liquid level sensor (3) and the bottom of the ink cartridge (1011).

3. The centralized control device of printing machine ink according to claim 1, characterized in that the measuring end of the third level sensor (19) is spaced from the port of the feed cylinder (17), and the measuring end of the fourth level sensor (20) is spaced from the bottom of the storage barrel (7).

4. The centralized ink control device of a printing press according to claim 3, wherein the gap between the measuring end of the third level sensor (19) and the port of the feed cylinder (17) is equal to the gap between the measuring end of the fourth level sensor (20) and the bottom of the storage barrel (7), and the distance between the port of the feed cylinder (17) and the bottom of the storage barrel (7) is not less than the distance output by the hydraulic cylinder (6).

5. The centralized control device for the printing ink of the printing machine as claimed in claim 1, wherein a display screen (802) and a control switch (801) are arranged on the control box (8), and the display screen (802) and the control switch (801) are respectively electrically connected with the controller (803).

6. The centralized control device of printing ink of a printing machine as claimed in claim 1, characterized in that a fixing frame (18) for fixing the feeding cylinder (17) is arranged between the upper side of the feeding cylinder (17) and the bottom of the control box (8).