A centralized ink supply for a printing press

Abstract

The application relates to a printing machine centralized ink supply device and relates to the technical field of printing equipment. The printing machine centralized ink supply device comprises an ink barrel, a driving piece, a conveying piece and a mixing piece. A pushing ring plate is slidably connected in the ink barrel. The pushing ring plate divides the space in the ink barrel into a storage cavity and a mounting cavity arranged in sequence along the vertical direction downwards. The conveying piece comprises an inlet pipe and an outlet pipe. The inlet pipe and the outlet pipe are arranged at the waist of the ink barrel and are communicated with the storage cavity. The mixing piece is arranged in the ink barrel and comprises a filtering ring plate and a liquid return pipe. One end of the filtering ring plate is connected to the bottom wall of the mounting cavity and encloses the bottom wall of the mounting cavity to form a filtering cavity. The other end of the filtering ring plate extends into the storage cavity, and the part extending into the storage cavity is provided with filtering holes. One end of the liquid return pipe is arranged at the top of the ink barrel and is communicated with the storage cavity. The other end of the liquid return pipe is arranged at the bottom of the ink barrel and is communicated with the filtering cavity. The application has the effect of keeping the concentration of the ink uniform.

Description

Technical Field

[0001] This application relates to the field of printing equipment technology, and in particular to a centralized ink supply device for a printing press. Background Technology

[0002] Centralized ink supply systems are used to supply ink to printing presses. They are designed to improve ink usage efficiency, ensure consistent print quality, and reduce operator workload. This system automates ink supply by centrally storing ink and using a pumping system to distribute it evenly to each printing unit. This method offers significantly higher printing efficiency compared to using multiple individual ink cartridges corresponding to each printing unit within the press.

[0003] A centralized ink supply system mainly consists of ink tanks, a piping system, and a pump unit. The piping system connects the ink tanks to the printing press, delivering the ink from the ink tanks to the printer, while the pump unit provides the power to extract the ink.

[0004] However, in actual use, because the ink tank needs to store the amount of ink supplied to multiple printing units, the ink tank needs to have a large volume. When the ink is left to stand still for a long time, the ink will separate into layers in the ink tank (pigment particles will settle, forming a clear liquid at the top of the ink tank and a turbid liquid at the bottom of the ink tank). This results in uneven ink concentration distribution, meaning that the ink concentration at the top of the ink tank will be lower than that at the bottom of the ink tank. This makes it impossible for the printing press to maintain color consistency during the printing process, and may even cause printing defects such as stripes and spots, thus affecting the printing quality. Summary of the Invention

[0005] The purpose of this application is to provide a centralized ink supply device for a printing press, which keeps the ink concentration uniform, thereby ensuring the printing quality of the printer.

[0006] Firstly, the centralized ink supply device for a printing press provided in this application adopts the following technical solution:

[0007] A centralized ink supply device for a printing press, comprising:

[0008] An ink tank, wherein a push ring plate is slidably connected inside the ink tank, and the push ring plate divides the space inside the ink tank to form an ink storage cavity and an installation cavity arranged vertically downwards in sequence;

[0009] A driving component, connected to the pushing ring plate, is used to drive the pushing ring plate to move;

[0010] The conveying component includes an inlet pipe and an outlet pipe, both of which are located at the waist of the ink tank and communicate with the ink storage chamber.

[0011] A mixing component, disposed inside the ink tank, includes a filter ring plate and a return pipe. One end of the filter ring plate is connected to the bottom wall of the mounting cavity and surrounds the bottom wall of the mounting cavity to form a filter cavity.

[0012] The other end of the filter ring plate extends into the ink storage chamber, and the portion extending into the ink storage chamber has a filter hole. One end of the return pipe is located at the top of the ink tank and communicates with the ink storage chamber, while the other end of the return pipe is located at the bottom of the ink tank and communicates with the filter chamber.

[0013] By adopting the above technical solution, when the ink in the ink storage chamber is delivered to the printing unit, the drive unit is activated, causing the push ring plate to move vertically upward. The space inside the ink storage chamber begins to contract, and under the pressure of the push ring plate, the ink in the middle of the ink tank is output and supplied to the printing unit, while the ink (clear liquid) at the top is delivered to the filter chamber and mixed with the pigment particles that have settled and entered the filter chamber. This ensures that the ink concentration in the ink tank remains uniform, guaranteeing the printing quality of the printer.

[0014] Optionally, the driving component includes a driving rod, a limiting rod, and a driving disk connected to the pushing ring plate. One end of the driving rod is inserted into the filter chamber, the driving disk is sleeved on the driving rod and threadedly connected to the driving rod, and a sliding groove is formed on the inner wall of the ink tank along its own height direction. One end of the limiting rod is inserted into the sliding groove, and the other end of the limiting rod is connected to the driving disk.

[0015] By adopting the above technical solution, when the drive rod rotates, due to the limiting effect of the slide groove on the limiting rod, the drive disk moves vertically along the height direction of the ink tank, thereby driving the push ring plate to move, so that the space of the ink storage cavity contracts or expands, so as to mix the upper clear liquid and the bottom turbid liquid, and output the ink to the printing unit.

[0016] Optionally, the mixing component further includes multiple spiral blades, which are arranged sequentially in the ink tank along the height direction of the ink tank, with the lowest spiral blade placed in the filter chamber.

[0017] By adopting the above technical solution, the spiral blades can stir the ink in the ink tank, reduce the settling rate of pigment particles, and the spiral blades located at the lower position can stir the upper clear liquid and the lower turbid liquid, ensuring the uniformity of the mixing of the clear liquid at the top and the turbid liquid at the bottom.

[0018] Optionally, multiple helical blades are all sleeved on the drive rod.

[0019] By adopting the above technical solution, the rotation of the drive rod not only drives the sliding of the push ring plate, but also provides power for the rotation of the helical blade.

[0020] Optionally, a ramp is provided on the top surface of the push ring plate.

[0021] By adopting the above technical solution, when pigment particles settle and fall onto the push ring plate, they are guided by the slope and can enter the filter chamber more smoothly, thus mixing better with the clear liquid input into the filter chamber from the return pipe.

[0022] Optionally, it also includes a control component for controlling the opening of the feed tube, the control component including a control valve and a sensing plate, the sensing plate being connected to the control valve and attached to the top wall of the ink storage cavity;

[0023] The control valve is located on the feed pipe. When the sensing element is immersed in the ink, the control valve is closed, and when the sensing element is not immersed in the ink, the control valve is open.

[0024] By adopting the above technical solution, after the ink storage chamber supplies ink to the printing unit, if the ring plate is pushed back to the initial position, that is, when the limiting rod abuts against the bottom wall of the slide, the ink storage chamber expands. Since some ink has already been output, a gap is formed between the ink surface and the top wall of the ink storage chamber. At this time, the sensing plate sends a signal to the control valve, causing the control valve to switch from the closed state to the open state, thereby enabling the feed pipe to supply ink to the ink tank, ensuring that the ink tank can stably output ink to the printing unit.

[0025] Optionally, a vent hole is provided on the bottom wall of the mounting cavity, and the vent hole is located outside the filter ring plate.

[0026] By adopting the above technical solution, when the push ring plate slides, it will change the size of the ink storage cavity and the mounting cavity. The setting of the vent hole will prevent the negative pressure or high pressure formed in the mounting cavity from hindering the movement of the push ring plate, thus ensuring the smooth movement of the push ring plate.

[0027] Optionally, a heating wire is provided inside the mounting cavity.

[0028] By adopting the above technical solution, the heating wire heats the air in the mounting cavity. The heated air can exchange heat with the filter ring plate and the pushing ring plate, thereby heating the ink located in the filter cavity and the ink storage cavity. This makes the pigment particles that settle in the filter cavity more active and accelerates the mixing of turbid liquid and clear liquid.

[0029] Optionally, it also includes a venting assembly disposed on the ink tank, the venting assembly including an air inlet pipe, an air pump and an air vent pipe, and two vent holes are provided;

[0030] One end of the air intake pipe is connected to one of the vent holes, the other end of the air intake pipe is connected to the air pump, the vent pipe is connected to another vent hole, and a pressure relief valve is provided on the vent pipe.

[0031] By adopting the above technical solution, when the push ring plate moves vertically upward, the air pump can introduce air into the mounting cavity through the air inlet pipe, and when the push ring plate moves vertically downward, the pressure relief valve can open, allowing air to flow out of the mounting cavity, thereby ensuring the stability of the pressure in the mounting cavity and enabling the push ring plate to move smoothly.

[0032] In summary, this application includes at least one of the following beneficial technical effects:

[0033] 1. When the ink in the ink reservoir is delivered to the printing unit, the drive unit is activated, causing the push ring plate to move vertically upward. The space inside the ink reservoir begins to contract, and under the pressure of the push ring plate, the ink in the middle of the ink tank is output and supplied to the printing unit, while the ink (clear liquid) at the top is delivered to the filter chamber, where it mixes with the pigment particles that have settled and entered the filter chamber. This ensures that the ink concentration in the ink tank remains uniform, guaranteeing the printing quality of the printer.

[0034] 2. When the drive rod rotates, due to the limiting effect of the slide groove on the limiting rod, the drive disk moves vertically along the height direction of the ink tank, thereby driving the push ring plate to move, so that the space of the ink storage cavity contracts or expands, so as to mix the upper clear liquid and the bottom turbid liquid, and output the ink to the printing unit.

[0035] 3. The spiral blades can stir the ink in the ink tank, reduce the settling rate of pigment particles, and the spiral blades located at the lower position can stir the upper clear liquid and the lower turbid liquid, ensuring the uniformity of the mixing of the clear liquid at the top and the turbid liquid at the bottom. Attached Figure Description

[0036] Figure 1 This is a three-dimensional structural schematic diagram of the ink supply device in this application;

[0037] Figure 2 This is a cross-sectional structural schematic diagram of the ink supply device in this application;

[0038] Figure 3 This is a cross-sectional structural schematic diagram of the ink supply device in this application from another perspective;

[0039] In the diagram, 1. Ink tank; 11. Ink storage chamber; 12. Mounting chamber; 13. Slide groove; 14. Vent hole; 2. Push ring plate; 21. Ramp; 3. Drive component; 31. Drive rod; 32. Limiting rod; 33. Drive disc; 331. Through hole; 34. Connecting rod; 4. Conveying component; 41. Feed pipe; 42. Discharge pipe; 5. Mixing component; 51. Filter ring plate; 511. Filter hole; 52. Return pipe; 53. Filter chamber; 54. Spiral blade; 6. Mounting base; 61. Support plate; 62. Constraint plate; 7. Heating wire; 8. Control component; 81. Control valve; 82. Induction plate; 9. Vent component; 91. Air inlet pipe; 92. Air pump; 93. Vent pipe; 94. Pressure relief valve. Detailed Implementation

[0040] The following is in conjunction with the appendix Figure 1 - Appendix Figure 3 This application will be described in further detail below.

[0041] A centralized ink supply device for a printing press, as described in the following article. Figure 1 and Figure 2 The system includes a mounting base 6, an ink tank 1, and a conveying component 4. The mounting base 6 supports the ink tank 1, and the ink tank 1 is mounted on the mounting base 6. Furthermore, a pushing ring plate 2 is slidably connected inside the ink tank 1. The pushing ring plate 2 divides the space inside the ink tank 1 to form an ink storage cavity 11 and a mounting cavity 12 arranged vertically downwards. The conveying component 4 includes an inlet pipe 41 and an outlet pipe 42. Both the inlet pipe 41 and the outlet pipe 42 are located at the waist of the ink tank 1 and communicate with the ink storage cavity 11.

[0042] The mounting base 6 mainly includes a support plate 61 and an L-shaped constraint plate 62. Multiple constraint plates 62 are provided, which surround the support plate 61 and are all connected to the support plate 61. The multiple constraint plates 62 enclose each other to form a limiting cavity. The ink tank 1 is inserted into the limiting cavity and thus fixed.

[0043] When multiple printing units in the printing press require ink supply, the push ring plate 2 is moved vertically upward, which causes the space of the ink storage chamber 11 to shrink, thereby causing the ink in the ink storage chamber 11 to be squeezed out from the discharge pipe 42. The ink flowing out from the discharge pipe 42 is finally transported to the printing press for printing.

[0044] It should be noted that the discharge pipe 42 mainly includes a main pipe and multiple branch pipes. The multiple branch pipes correspond one-to-one with multiple printing units in the printing press and are all connected to the main pipe, thereby supplying ink to each printing unit.

[0045] In addition, sealing plates (not shown in the figure) are provided on both the inner and outer ring surfaces of the pushing ring plate 2. The sealing plate on the inner ring surface abuts against the filter ring plate 51, and the sealing plate on the outer ring surface abuts against the inner wall of the ink tank 1, thereby reducing the possibility of ink overflowing from the ink storage cavity 11 into the mounting cavity 12.

[0046] Furthermore, referring to Figure 2 and Figure 3 The ink tank 1 is equipped with a mixing element 5, which is used to mix the clear liquid at the top of the ink storage chamber 11 and the turbid liquid at the bottom of the ink storage chamber 11. The mixing element 5 includes a filter ring plate 51 and a return pipe 52. One end of the filter ring plate 51 is connected to the bottom wall of the mounting cavity 12 and surrounds the bottom wall of the mounting cavity 12 to form a filter cavity 53. The other end of the filter ring plate 51 extends into the ink storage chamber 11, and the part extending into the ink storage chamber 11 is provided with a filter hole 511. One end of the return pipe 52 is located at the top of the ink tank 1 and communicates with the ink storage chamber 11. The other end of the return pipe 52 is located at the bottom of the ink tank 1 and communicates with the filter cavity 53.

[0047] When the ring plate 2 is pushed vertically upward, the ink at the waist of the ink tank 1 flows out from the discharge pipe 42, while the ink at the top of the ink tank 1 flows out from the return pipe 52 and eventually flows into the filter chamber 53. The pigment particles that settle into the filter chamber 53 cause the filter chamber 53 to form turbid liquid. The clear liquid and the turbid liquid mix, thereby ensuring the uniformity of ink concentration in the ink tank 1.

[0048] Furthermore, referring to Figure 2 A ramp 21 is provided on the top surface of the push ring plate 2. When pigment particles settle on the top surface of the push ring plate 2, they are guided by the ramp 21 and can enter the filter chamber 53 more smoothly.

[0049] It should be noted that in this embodiment, a one-way valve is provided on the return pipe 52, meaning that ink can only flow from the top of the ink storage chamber 11 into the filter chamber 53 through the return pipe 52.

[0050] Reference Figure 3 It also includes a control component 8 for controlling the opening of the feed pipe 41, so that the feed pipe 41 inputs ink into the ink tank 1, thereby ensuring that the ink tank 1 has sufficient ink. The control component 8 includes a control valve 81 and a sensing plate 82. The sensing plate 82 is connected to the control valve 81 and is attached to the top wall of the ink storage chamber 11. The control valve 81 is set on the feed pipe 41. When the sensing plate 82 is immersed in the ink, the control valve 81 is closed. When the sensing plate 82 is not immersed in the ink, the control valve 81 is open.

[0051] After ink is supplied to the printing unit by the ink storage chamber 11, if the ring plate 2 is pushed back to the initial position, the ink storage chamber 11 will become larger. Since some ink has already been output, a gap is formed between the ink surface and the top wall of the ink storage chamber 11, so that the sensing plate 82 is not immersed in the ink. At this time, the sensing plate 82 sends a signal to the control valve 81, causing the control valve 81 to change from the closed state to the open state, thereby enabling the feed pipe 41 to supply ink to the ink tank 1, ensuring that the ink tank 1 can stably output ink to the printing unit.

[0052] Furthermore, referring to Figure 2 and Figure 3 The ink supply device also includes a driving component 3, which is used to drive the push ring plate 2 to move in the vertical direction. Specifically, the driving component 3 includes a driving rod 31, a limiting rod 32, and a driving disk 33 connected to the push ring plate 2. In this embodiment, the driving disk 33 is provided with a through hole 331 to facilitate the flow of ink in the ink storage cavity 11. A plurality of connecting rods 34 are provided between the push ring plate 2 and the driving disk 33. The plurality of connecting rods 34 are arranged around the push ring plate 2 and are respectively connected to the push ring plate 2 and the driving disk 33.

[0053] The drive rod 31 is driven to rotate by a motor. One end of the drive rod 31 is inserted into the filter chamber 53. The drive disk 33 is sleeved on the drive rod 31 and threadedly connected to the drive rod 31 (the drive rod 31 has threads). A sliding groove 13 is opened on the inner wall of the ink tank 1 along its own height direction. One end of the limiting rod 32 is inserted into the sliding groove 13, and the other end of the limiting rod 32 is connected to the drive disk 33.

[0054] When the drive rod 31 rotates forward, due to the limiting effect of the slide groove 13 on the limiting rod 32, the drive disk 33 moves vertically upward along the height direction of the ink tank 1, thereby driving the push ring plate 2 to move, so that the space of the ink storage cavity 11 is contracted to mix the upper clear liquid and the bottom turbid liquid, and the ink is output to the printing unit. When the drive rod 31 rotates in reverse, the drive disk 33 drives the push ring plate 2 to reset.

[0055] It should be noted that in this embodiment, when the limiting rod 32 abuts against the top wall of the slide 13, the bottom surface of the pushing ring plate 2 is lower than the top surface of the filter ring plate 51. When the limiting rod 32 abuts against the bottom wall of the slide 13, the pushing ring plate 2 maintains a distance from the bottom wall of the ink tank 1, and the position of the filter hole 511 on the filter ring plate 51 is higher than the top surface of the filter ring plate 51. That is, during the movement of the pushing ring plate 2, the filter ring plate 51 always partially extends into the ink storage cavity 11, so that the pigment particles after sedimentation enter the filter cavity 53 through the filter hole 511.

[0056] In addition, in other embodiments, the driving component 3 may also include a telescopic cylinder disposed in the mounting cavity 12, the output end of the telescopic cylinder being connected to the bottom surface of the pushing ring plate 2, and the same effect can be achieved by pushing the ring plate 2 with the telescopic cylinder.

[0057] Furthermore, referring to Figure 3 When the push ring plate 2 slides, it will change the size of the ink storage cavity 11 and the mounting cavity 12. The bottom wall of the mounting cavity 12 is provided with a vent hole 14. The vent hole 14 is located outside the filter ring plate 51, so that the mounting cavity 12 is connected to the outside world, preventing the formation of negative pressure or high pressure in the mounting cavity 12, thereby hindering the movement of the push ring plate 2 and ensuring the smooth movement of the push ring plate 2.

[0058] In addition, a heating wire 7 is provided in the mounting cavity 12. The heating wire 7 is arranged in a vortex shape and attached to the bottom wall of the mounting cavity 12 to heat the air in the mounting cavity 12. The heated air can exchange heat with the filter ring plate 51 and the pushing ring plate 2, thereby heating the ink located in the filter cavity 53 and the ink storage cavity 11. This makes the pigment particles that settle in the filter cavity 53 more active and accelerates the mixing of turbid liquid and clear liquid.

[0059] Furthermore, referring to Figure 1 and Figure 3 It also includes a ventilation assembly 9 installed on the ink tank 1. The ventilation assembly 9 includes an air inlet pipe 91, an air pump 92 and a vent pipe 93. There are two vent holes 14. One end of the air inlet pipe 91 is connected to one vent hole 14 and the other end of the air inlet pipe 91 is connected to the air pump 92. The vent pipe 93 is connected to the other vent hole 14 and a pressure relief valve 94 is installed on the vent pipe 93.

[0060] When the push ring plate 2 moves vertically upward, the air pressure in the mounting cavity 12 decreases. At this time, the air pump 92 can fill the mounting cavity 12 with air through the air inlet pipe 91. When the push ring plate 2 moves vertically downward, the air pressure in the mounting cavity 12 increases. At this time, the pressure relief valve 94 can open, allowing air to flow out of the mounting cavity 12, thereby ensuring the stability of the pressure in the mounting cavity 12 and enabling the push ring plate 2 to move smoothly.

[0061] Reference Figure 2 and Figure 3 The mixing component 5 also includes multiple spiral blades 54. In this embodiment, there are 6 spiral blades 54 arranged sequentially along the height direction of the ink tank 1 and divided into two groups, symmetrically distributed on both sides of the drive disk 33. The spiral blade 54 located at the lowest position is placed in the filter chamber 53 (in this embodiment, two spiral blades 54 are located in the filter chamber 53).

[0062] The ink in the ink tank 1 is stirred by the spiral blade 54, which reduces the settling rate of pigment particles. The spiral blade 54 located at the lower position can stir the upper clear liquid and the lower turbid liquid, ensuring the uniformity of the mixing of the clear liquid at the top and the turbid liquid at the bottom.

[0063] It should be noted that in this embodiment, multiple helical blades 54 are all sleeved on the drive rod 31, that is, the rotation of the drive rod 31 drives the push ring plate 2 to slide, and also provides power for the rotation of the helical blades 54.

[0064] The implementation principle of this application embodiment is as follows: When the ink in the ink storage chamber 11 is transported to the printing unit, the drive unit 3 is activated, causing the push ring plate 2 to move vertically upward. The space in the ink storage chamber 11 begins to contract and is squeezed by the push ring plate 2. The ink in the middle of the ink tank 1 is output and supplied to the printing unit, while the ink (clear liquid) at the top is transported to the filter chamber 53 and mixed with the pigment particles that have settled and entered the filter chamber 53. After being stirred by the spiral blade 54, the ink concentration in the ink tank 1 is kept uniform, ensuring the printing quality of the printer.

[0065] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A centralized ink supply for a printing press, characterized by, include: Ink tank (1), a push ring plate (2) is slidably connected inside the ink tank (1), the push ring plate (2) divides the space inside the ink tank (1) to form an ink storage cavity (11) and an installation cavity (12) arranged vertically downwards. The driving component (3) is connected to the pushing ring plate (2) and is used to drive the pushing ring plate (2) to move; The conveying component (4) includes an inlet pipe (41) and an outlet pipe (42). The inlet pipe (41) and the outlet pipe (42) are both located at the waist of the ink tank (1) and are connected to the ink storage chamber (11). A mixing component (5) is disposed inside the ink tank (1) and includes a filter ring plate (51) and a return pipe (52). One end of the filter ring plate (51) is connected to the bottom wall of the mounting cavity (12) and surrounds the bottom wall of the mounting cavity (12) to form a filter cavity (53). The other end of the filter ring plate (51) extends into the ink storage chamber (11), and the part extending into the ink storage chamber (11) is provided with filter holes (511). One end of the return pipe (52) is set at the top of the ink tank (1) and communicates with the ink storage chamber (11). The other end of the return pipe (52) is set at the bottom of the ink tank (1) and communicates with the filter chamber (53). The driving component (3) includes a driving rod (31), a limiting rod (32) and a driving disk (33) connected to the pushing ring plate (2). One end of the driving rod (31) is inserted into the filter chamber (53), and the driving disk (33) is sleeved on the driving rod (31) and threadedly connected to the driving rod (31). The inner wall of the ink tank (1) is provided with a sliding groove (13) along its own height direction. One end of the limiting rod (32) is inserted into the sliding groove (13), and the other end of the limiting rod (32) is connected to the drive disk (33). The mixing component (5) also includes multiple spiral blades (54), which are arranged sequentially in the ink tank (1) along the height direction of the ink tank (1), and the spiral blade (54) located at the lowest position is placed in the filter chamber (53).

2. A centralized ink supply for a printing press as claimed in claim 1, wherein, Multiple spiral blades (54) are mounted on the drive rod (31).

3. A centralized ink supply for a printing press as defined in claim 1, wherein A ramp (21) is provided on the top surface of the pushing ring plate (2).

4. A centralized ink supply for a printing press as claimed in claim 1 or 3, characterized in that The inner and outer ring surfaces of the push ring plate (2) are provided with sealing plates. The sealing plate on the inner ring surface abuts against the filter ring plate (51), and the sealing plate on the outer ring surface abuts against the inner wall of the ink tank (1).

5. The centralized ink supply for a printing press of claim 1 wherein, It also includes a control component (8) for controlling the opening of the feed tube (41), the control component (8) including a control valve (81) and a sensing plate (82), the sensing plate (82) being connected to the control valve (81) and attached to the top wall of the ink storage chamber (11); The control valve (81) is located on the feed pipe (41). When the sensing plate (82) is immersed in the ink, the control valve (81) is closed, and when the sensing plate (82) is not immersed in the ink, the control valve (81) is open.

6. A centralized ink supply for a printing press as defined in claim 1, wherein, A vent hole (14) is provided on the bottom wall of the mounting cavity (12), and the vent hole (14) is located outside the filter ring plate (51).

7. A centralized ink supply for a printing press as claimed in claim 6, wherein, A heating wire (7) is provided inside the mounting cavity (12).

8. A centralized ink supply for a printing press according to claim 6 or 7, characterized in that It also includes a ventilation assembly (9) disposed on the ink tank (1), the ventilation assembly (9) including an air inlet pipe (91), an air pump (92) and an air vent (93), and two ventilation holes (14) are provided; One end of the air inlet pipe (91) is connected to one of the air vents (14), the other end of the air inlet pipe (91) is connected to the air pump (92), the vent pipe (93) is connected to another of the air vents (14), and a pressure relief valve (94) is provided on the vent pipe (93).

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