A printing press ink replenishment device

Abstract

This invention innovatively provides an ink replenishment device for a printing press, including an ink tank, an ink chamber disposed above a storage chamber, a piston plate disposed at the bottom of the ink chamber, a pressing structure disposed between the ink chamber and the storage chamber, a liquid passage hole disposed on the pressing structure, and a reset member disposed on the pressing structure. The reset member is used to provide a reset force to close the liquid passage hole in a natural state. A floating plate is disposed inside the ink chamber, and a roller groove for placing printing rollers is disposed on the floating plate. The floating plate has a first position state and a second position state. When the floating plate is in the first position state, the liquid passage hole is closed. When the floating plate is in the second position state, the pressing structure is triggered to open the liquid passage hole, and the ink in the storage chamber moves to the side where the ink chamber is located, driving the floating plate to return to the first position state.

Description

Technical Field

[0001] This invention relates to the technical field of printing equipment, and more specifically to an ink replenishment device for a printing press. Background Technology

[0002] A printing press is a machine that prints text and images. Modern printing presses generally consist of mechanisms for mounting the printing plate, inking, printing, and paper feeding (including folding). Its working principle is as follows: First, the text and images to be printed are made into a printing plate and mounted on the printing press. Then, ink is applied to the areas of the printing plate with text and images by hand or by the printing press. The ink is then transferred directly or indirectly to paper or other printing substrates (such as textiles, metal plates, plastics, leather, wood, glass, and ceramics) to reproduce a printed product identical to the printing plate. The invention and development of the printing press has played a vital role in the dissemination of human civilization and culture. During the printing process, the printing rollers in the ink tank come into contact with the ink and transfer it onto other items. As the printing press continues to operate, the ink is constantly consumed, requiring manual replenishment. Simultaneously, during ink replenishment, the ink comes into contact with air, causing air bubbles to form on the ink surface. These air bubbles then come into contact with the printing rollers during printing, affecting the transfer effect. Currently, the market primarily relies on manual ink addition, which cannot provide timely replenishment of the ink in the ink tank. Furthermore, the filling process easily generates air bubbles, impacting the printing quality. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a printing press ink replenishment device to overcome the above-mentioned defects in the prior art.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A printing press ink replenishment device includes an ink tank, a printing roller disposed within the ink tank, a pressing structure disposed within the ink tank, the ink tank being divided by the pressing structure to form an ink cavity and a storage cavity, the storage cavity being disposed below the ink cavity, and a vacuum piston plate disposed at the bottom of the storage cavity, the pressing structure being provided with a liquid passage hole, and a reset member disposed on the pressing structure, the reset member being used to provide a reset force to close the liquid passage hole in a natural state, a floating plate disposed within the ink cavity, the floating plate being provided with a roller groove for placing the printing roller, the floating plate being disposed on the ink surface, the floating plate having a first position state and a second position state, when the floating plate is in the first position state, the liquid passage hole is closed, when the floating plate is in the second position state, the pressing structure is triggered to open the liquid passage hole, the ink in the storage cavity moves towards the side where the ink cavity is located, and drives the floating plate to return to the first position state.

[0006] Preferably, a winding device is provided above the floating plate, and the floating plate moves up and down to make the winding device rotate. The winding device is configured to output an electrical signal to the electrode on the floating plate when the floating plate is in the second position state. The pressing structure is provided with a magnetic sheet corresponding to the electrode.

[0007] Preferably, a limiting structure is provided on the inner wall of the ink cavity, and when the floating plate is in the second position, the limiting structure is pressed against the floating plate.

[0008] Preferably, two sets of sliding grooves are arranged opposite each other on the inner sidewall of the ink cavity, and each set of sliding grooves is provided with a limiting structure. The limiting structure includes a magnetic block and a compression spring. When the compression spring is in an unstretched state, the magnetic block is disposed in the sliding groove.

[0009] Preferably, the pressing structure includes a support frame and a pressing plate, the support frame is provided with a sealing rod, the pressing plate is provided with a through hole, and the sealing rod is inserted into the through hole.

[0010] Preferably, the sealing rod is provided with a liquid inlet channel, and a one-way valve is provided in the liquid inlet channel. When the float plate is in the first position, the pressing plate is located at the outlet of the liquid inlet channel.

[0011] Preferably, a rotating sleeve is threaded onto the sealing plate, the rotating sleeve is provided with a first liquid passage hole, and the pressing plate is provided with a second liquid passage hole. When the floating plate is in the first position, the first liquid passage hole and the second liquid passage hole are misaligned, and when the floating plate is in the second position, the first liquid passage hole and the second liquid passage hole are connected.

[0012] Preferably, the printing tank is provided with a defoaming roller arranged parallel to the printing roller, and the defoaming roller and the printing roller are connected by a pulley.

[0013] Preferably, the ink cavity has two sets of guide structures, with the defoaming roller positioned between the two sets of guide structures, and the floating plate moves up and down to make the defoaming roller move in the horizontal direction.

[0014] The beneficial effects of this invention are as follows: During use, the ink height is detected in real time by the floating plate. When the floating plate descends to its limit position, the winding device drives the power supply to start. After the electrodes are energized, the floating plate is fixed in the designated position under the action of the limiting structure. After the pressing plate moves down to the designated height under the action of the electrode magnetic force, the liquid passage opens, and the ink in the storage cavity enters the ink cavity in a measured amount, realizing the replenishment of ink. While realizing automatic ink replenishment, it avoids air entering the ink and generating bubbles, which would affect the printing effect. A defoaming roller is set on the floating plate. The defoaming roller is used to eliminate the bubbles generated by the printing roller, preventing bubbles from adhering to the surface of the printing roller and affecting the printing effect of the printing roller. Attached Figure Description

[0015] Figure 1 This is an overall structural diagram of the present invention;

[0016] Figure 2 This is a cross-sectional view of the present invention;

[0017] Figure 3 This is a structural diagram of the floating plate of the present invention.

[0018] Figure 4 This is a partially enlarged view of the present invention;

[0019] Figure 5 This is another embodiment of the present invention.

[0020] Reference numerals: 1. Ink tank; 11. Ink cavity; 12. Storage cavity; 13. Vacuum piston plate; 14. Limiting structure; 141. Magnetic locking block; 15. Sliding groove; 2. Printing roller; 3. Floating plate; 31. Roller groove; 32. Defoaming roller; 33. Guide structure; 4. Pressing structure; 41. Support frame; 42. Pressing plate; 43. Sealing rod; 44. Liquid inlet channel; 45. Rotating sleeve; 451. First liquid inlet hole; 452. Second liquid inlet hole; 5. Rewinding device. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings:

[0025] like Figure 1-5As shown, this invention provides a printing press ink replenishment device, including an ink tank 1, a printing roller 2 disposed within the ink tank 1, and a pressing structure 4 disposed within the ink tank 1. The ink tank 1 is divided by the pressing structure 4 to form an ink cavity 11 and a storage cavity 12. The storage cavity 12 is disposed below the ink cavity 11 and is used to store ink. The printing roller 2 is disposed within the ink cavity 11. During use, the printing roller 2 picks up ink from the ink cavity 11 for printing. Simultaneously, when the ink level in the ink cavity 11 drops, the pressing structure 4 is pressed down, transferring the ink from the storage cavity 12 to the area above the pressing structure 4, i.e., into the ink cavity 11. The pressing structure 4 resets, ensuring that the ink level in the ink chamber 11 always exceeds the bottom of the printing roller 2, ensuring that the printing roller 2 is always in contact with the ink during use. A vacuum piston plate 13 is provided at the bottom of the storage chamber 12. Using the vacuum piston plate 13 and the pressing structure 4, the storage chamber 12 is formed into a vacuum chamber. During the pressing process of the pressing structure 4, the ink in the storage chamber 12 enters the ink chamber 11. Subsequently, the pressing structure 4 resets. During the reset process, the pressure in the storage chamber 12 decreases, and the vacuum piston plate 13 moves towards the side where the pressing structure 4 is located under atmospheric pressure. The volume of the storage chamber 12 decreases under atmospheric pressure, preventing air from entering the storage chamber 12. Within 2, the generation of air bubbles is reduced; the pressing structure 4 is provided with a liquid passage hole and a reset element. The reset element provides a reset force to close the liquid passage hole in its natural state. During use, by pressing down on the pressing structure 4, the liquid passage hole on the pressing structure 4 opens. At the same time, the ink in the storage cavity 12 at the bottom of the pressing structure 4 enters the ink cavity 11 through the liquid passage hole under the action of the pressing structure 4. When the force on the pressing structure 4 is released, the pressing structure 4 resets under the action of the reset element. The ink level in the ink cavity 11 rises with the reset of the pressing structure 4, realizing the replenishment of ink. The pressing structure 4 is used to replenish the ink in the ink cavity 11, which is different from the ink replenishment from top to bottom. During the replenishment process, air can be prevented from entering the ink, reducing the generation of air bubbles in the ink. This prevents air bubbles floating on the ink surface from contacting the printing roller 2, which could affect the ink pick-up effect of the printing roller 2 and lead to uneven printing. A floating plate 3 is provided in the ink cavity 11. The floating plate 3 is provided with a roller groove 31 for placing the printing roller 2. The floating plate 3 is set on the ink surface. The floating plate 3 is used to detect the ink height in the ink cavity 11 in real time. At the same time, the roller groove 31 on the floating plate 3 is used to prevent the printing roller 2 from colliding with the floating plate 3 during use, which would affect the normal use of the printing roller 2 and the floating plate 3.The floating plate 3 includes a first position and a second position, which represent the maximum and minimum ink heights, respectively. These positions limit the contact height between the printing roller 2 and the ink, ensuring that the amount of ink picked up by the printing roller 2 each time is controlled within a certain range. This prevents excessive ink contact, resulting in overly dark printing, and also avoids insufficient contact, leading to overly light printing and affecting the printing effect. When the floating plate 3 is in the first position, the liquid passage is closed, preventing ink exchange between the two sides of the pressing interface. This ensures the sealing of the storage cavity 12 and prevents impurities in the ink cavity 11 from entering and contaminating the ink in the storage cavity 12. When the floating plate 3 is in the second position, the pressing structure 4 is triggered to open the liquid passage. The pressing structure 4 moves downward, simultaneously opening the liquid passage and squeezing the ink in the storage cavity 12. The ink enters the ink cavity 11, and the ink in the storage cavity 12 moves towards the side where the ink cavity 11 is located, driving the float plate 3 to return to its first position. When the pressing structure 4 is pressed down to the designated position, it resets under the action of the elastic element. At the same time, the float plate 3 resets to its first position under the buoyancy of the ink in the ink cavity 11, thus replenishing the ink. During the ink replenishment process, the pressing structure 4 replenishes the ink from the storage cavity 12 to the ink cavity 11, preventing air from entering the ink and affecting the printing effect, while also preventing impurities in the ink cavity 11 from entering the storage cavity 12. Furthermore, during the cleaning process of the ink tank 1, the float plate 3 can be removed, allowing for direct cleaning of the ink cavity 11, reducing the cleaning area of ​​the ink tank 1 and minimizing manpower consumption.

[0026] A winding device 5 is installed above the floating plate 3. The winding device 5 includes a winding roller and a winding rope. The two ends of the winding rope are fixedly installed on the floating plate 3 and the winding roller, respectively. The floating plate 3 moves up and down with the ink to make the winding device 5 rotate. A torsion spring is installed on the winding roller. When the floating plate 3 moves upward with the ink, the winding roller is reset under the action of the torsion spring. When the floating plate moves downward with the ink, the winding rope moves downward with the floating plate 3. The winding device 5 is configured such that when the floating plate 3 is in the second position, the winding roller rotates to the designated position, triggers a switch, and outputs an electrical signal to the electrode on the floating plate 3. A magnetic sheet corresponding to the electrode is installed on the pressing structure 4. The electrode on the floating plate 3 generates a magnetic field. Under the action of the electrode magnetic field, the pressing structure 4 receives a downward pressing force. The pressing structure 4 moves downward, opening the liquid passage. The state of the pressing structure 4 is adjusted by the electrode and the floating plate 3, realizing automatic ink replenishment during the printing process without manual operation, reducing labor consumption, and not affecting the normal operation of the printing machine.

[0027] A limiting structure 14 is provided on the inner wall of the ink cavity 11. When the float plate 3 is in the second position, the limiting structure 14 is pressed against the float plate 3. The limiting structure 14 is provided in the ink cavity 11 to limit the float plate 3. When the motor is charging and generating a magnetic field, the float plate 3 and the pressing structure 4 generate a magnetic force relative to each other. The limiting structure 14 is used to fix the float plate 3 to prevent the float plate 3 from moving upward under the action of magnetic force, which would cause the motor to be de-energized and affect the downward movement of the pressing structure 4. During the electrode energization process, the electrode is used to defoam the ink entering the ink cavity 11 from the storage cavity 12. After the electrode is energized, the pressing structure 4 is used to replenish the ink in the ink cavity 11. After being energized for a period of time, the electrode current gradually decreases, the magnetic force generated by the electrode gradually decreases, and after the pressing structure 4 gradually resets, the electrode magnetic force completely disappears, the float plate 3 is separated from the limiting structure 14, and the float plate 3 resets under the action of buoyancy.

[0028] Two sets of sliding grooves 15 are arranged opposite each other on the inner wall of the ink chamber 11. Each set of sliding grooves 15 is provided with a limiting structure 14. The limiting structure 14 includes a magnetic block 141 and a compression spring. When the compression spring is in an unstretched state, the magnetic block 141 is set in the sliding groove 15. During normal use, the magnetic block 141 is set in the sliding groove 15 under the action of the compression spring, without affecting the up and down movement of the floating plate 3. When the floating plate 3 is in the second position In the current state, the electrode is energized and the float plate 3 is located below the sliding groove 15. The magnetic block 141 moves to the outside of the sliding groove 15 under the action of the electrode's magnetic force and presses against the float plate 3. The magnetic block 141 limits the float plate 3 to prevent it from moving upward under the action of magnetic force during the pushing out process of the pressing plate 42. After the electrode is de-energized, the magnetic block 141 is driven by the compression spring to return to the sliding groove 15. After the float plate 3 is freed from the restriction of the magnetic block 141, it returns to its original position under the action of buoyancy.

[0029] The pressing structure 4 includes a support frame 41 and a pressing plate 42. A sealing rod 43 is provided on the support frame 41, and a through hole is provided on the pressing plate 42. The sealing rod 43 is inserted into the through hole. The support frame 41 is fixed to the inner wall of the ink tank 1, and the pressing plate 42 is located below the support frame 41. The pressing plate 42 is sealed to the ink tank 1. During the up and down movement of the pressing plate 42, the pressing plate 42 is always sealed to the ink tank 1. The pressing plate 42 is provided with a through hole, and the sealing rod 43 is inserted into the through hole. The sealing rod 43 is used to limit the up and down movement of the pressing plate 42 to prevent the pressing plate 42 from being misaligned and affecting the normal use of the pressing structure 4.

[0030] A liquid inlet channel 44 is provided on the sealing rod 43, and a one-way valve is provided inside the liquid inlet channel 44. When the float plate 3 is in the first position, the pressing plate 42 is located at the outlet of the liquid inlet channel 44. A 7-shaped liquid inlet channel 44 is provided on the sealing rod 43, with an inlet at the bottom of the sealing rod 43 and an outlet on the side wall of the sealing rod 43. During use, when the float plate is in the first position, the pressing plate 42 is located at the outlet of the liquid inlet channel 44, thus closing the liquid inlet channel 44. When the pressing plate 42 is pressed down, it disengages from the outlet of the liquid inlet channel 44, opening the liquid inlet channel 44 to replenish ink. At the same time, a one-way valve is provided inside the sealing rod 43 to prevent ink in the ink chamber 11 from flowing back into the storage chamber 12 and contaminating the ink in the storage chamber 12.

[0031] In another embodiment, a rotating sleeve 45 is threadedly connected to the sealing plate. The rotating sleeve 45 is provided with a first liquid passage hole, and the pressing plate 42 is provided with a second liquid passage hole. When the float plate 3 is in the first position, the first liquid passage hole and the second liquid passage hole are misaligned. When the float plate is in the second position, the first liquid passage hole and the second liquid passage hole are connected. During normal use of the ink tank 1, the misalignment of the first liquid passage hole and the second liquid passage hole causes the liquid passage hole to close. The rotating sleeve 45 is rotatably mounted on the pressing plate 42. During the downward movement of the pressing plate 42, the rotating sleeve 45 rotates relative to the pressing plate 42. During the rotation of the rotating sleeve 45, the first liquid passage hole on the rotating sleeve 45 rotates and connects with the second liquid passage hole, thereby opening the liquid passage hole.

[0032] A defoaming roller 32 is installed in the printing tank, parallel to the printing roller 2. The defoaming roller 32 is connected to the printing roller 2 via a pulley. During the rotation of the printing roller 2, the defoaming roller 32 is driven to rotate. The defoaming roller 32 is located on one side of the printing roller 2, and the printing roller 2 is located on the liquid outlet side of the printing roller 2. During the rotation of the printing roller 2 in the ink, due to the uneven surface of the printing roller 2, air enters into the ink through the printing roller 2 and generates bubbles. Defoaming needles are installed on the defoaming roller 32. During the rotation of the defoaming roller 32, the defoaming needles puncture the bubbles, thereby defoaming the ink.

[0033] Two sets of guide structures 33 are arranged opposite each other inside the ink chamber 11. The defoaming roller 32 is disposed between the two sets of guide structures 33. The floating plate 3 moves up and down to make the defoaming roller 32 move in the horizontal direction. Two sets of guide structures 33 are provided inside the ink chamber 11. During the downward movement of the floating plate 3, the guide structures 33 are used to move the floating plate 3 towards the side where the printing roller 2 is located, ensuring that the pulley is always in a taut state, ensuring that the defoaming roller 32 is always connected to the printing roller 2, and ensuring the normal use of the defoaming roller 32. The two sets of guide structures 33 are arranged opposite each other, and the two sets of guide structures 33 are provided with arc-shaped guide surfaces. The arc-shaped guide surfaces are used to limit the movement position of the floating plate 3, ensuring that the position of the defoaming roller 32 and the printing roller 2 is always the same during the up and down movement of the floating plate 3.

[0034] Working principle: During the printing process, the float plate 3 floats on the ink surface. The printing roller 2 rotates, driving the defoaming roller 32 to defoam the air bubbles generated by the printing roller 2. As printing progresses, the ink in the ink chamber 11 is consumed, the liquid level drops, and the float plate 3 moves downwards, driving the take-up rope and take-up roller to rotate. When the float plate 3 reaches its limit position, the take-up roller rotates to a specified angle, energizing the electrode. Simultaneously, the float plate 3 is fixed within the ink chamber 11 by the limiting structure 14. The float plate 3 and the pressing plate 42 generate a magnetic force, causing the pressing plate 42 to move under the magnetic force, opening the liquid passage and allowing ink from the storage chamber 12 to enter. After the ink is inserted into the ink chamber 11, the electrode current gradually decreases after the pressing plate 42 moves to the bottom, thus reducing the magnetic force generated by the electrode. The pressing plate 42 gradually resets under the action of the elastic element, closing the liquid passage and raising the ink level in the ink chamber 11. After the pressing plate 42 resets, the vacuum compression plate is pushed upward under the action of atmospheric pressure, ensuring that the storage chamber 12 is in a vacuum state and preventing air from entering the storage chamber 12. At the same time, after the electrode is completely de-energized, the limiting structure 14 disengages from the floating plate 3. The floating plate 3 resets to the first position under the action of buoyancy. At the same time, the winding roller resets under the action of the torsion spring, and the winding rope is wound around the winding roller.

[0035] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A printing press ink replenishment device, comprising an ink tank (1) and printing rollers (2) disposed within the ink tank (1), characterized in that, The ink tank (1) is provided with a pressing structure (4). The ink tank (1) is divided by the pressing structure (4) to form an ink cavity (11) and a storage cavity (12). The storage cavity (12) is located below the ink cavity (11), and a vacuum piston plate (13) is provided at the bottom of the storage cavity (12). The pressing structure (4) is provided with a liquid passage hole and a reset member. The reset member is used to provide a reset force to close the liquid passage hole in a natural state. A floating plate (3) is provided in the ink cavity (11). The floating plate (3) is provided with a roller groove (31) for placing the printing roller (2). The floating plate (3) is set on the surface of the ink. The floating plate (3) has a first position state and a second position state. When the floating plate (3) is in the first position state, the liquid passage hole is closed. When the floating plate (3) is in the second position state, the pressing structure (4) is triggered to open the liquid passage hole. The ink in the storage cavity (12) moves to the side where the ink cavity (11) is located and drives the floating plate (3) to return to the first position state. The pressing structure (4) includes a support frame (41) and a pressing plate (42). A sealing rod (43) is provided on the support frame (41). A through hole is provided on the pressing plate (42). The sealing rod (43) is inserted into the through hole.

2. The ink replenishment device for a printing press according to claim 1, characterized in that, A winding device (5) is provided above the floating plate (3). The floating plate (3) moves up and down to make the winding device (5) rotate. The winding device (5) is configured to output an electrical signal to the electrode on the floating plate (3) when the floating plate (3) is in the second position state. A magnetic sheet corresponding to the electrode is provided on the pressing structure (4).

3. The ink replenishment device for a printing press according to claim 1, characterized in that, A limiting structure (14) is provided on the inner wall of the ink cavity (11). When the floating plate (3) is in the second position, the limiting structure (14) is pressed against the floating plate (3).

4. The ink replenishment device for a printing press according to claim 3, characterized in that, Two sets of sliding grooves (15) are arranged opposite each other on the inner sidewall of the ink cavity (11). Each set of sliding grooves (15) is provided with a limiting structure (14). The limiting structure (14) includes a magnetic card block (141) and a compression spring. When the compression spring is in an unstretched state, the magnetic card block (141) is placed in the sliding groove (15).

5. The ink replenishment device for a printing press according to claim 1, characterized in that, The sealing rod (43) is provided with a liquid inlet channel (44), and a one-way valve is provided in the liquid inlet channel (44). When the float plate (3) is in the first position, the pressing plate (42) is located at the outlet of the liquid inlet channel (44).

6. The ink replenishment device for a printing press according to claim 1, characterized in that, A rotating sleeve (45) is threaded onto the sealing rod (43). The rotating sleeve (45) is provided with a first liquid passage hole, and the pressing plate (42) is provided with a second liquid passage hole. When the floating plate (3) is in the first position, the first liquid passage hole and the second liquid passage hole are misaligned. When the floating plate is in the second position, the first liquid passage hole and the second liquid passage hole are connected.

7. The ink replenishment device for a printing press according to claim 1, characterized in that, The ink tank (1) is provided with a defoaming roller (32) arranged parallel to the printing roller (2), and the defoaming roller (32) and the printing roller (2) are connected by a pulley.

8. The ink replenishment device for a printing press according to claim 7, characterized in that, Two sets of guide structures (33) are arranged opposite each other in the ink cavity (11), and the defoaming roller (32) is arranged between the two sets of guide structures (33). The floating plate (3) moves up and down so that the defoaming roller (32) moves in the horizontal direction.

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