An ink automatic replenishing printing machine

Abstract

This utility model relates to the field of printing press technology, and in particular to an automatic ink replenishment printing press, comprising: a frame; a reference plate fixedly connected to the frame; a printing plate mounted on the reference plate; a Y-axis slide rail; a blade clamp slidably connected to the Y-axis slide rail; a doctor blade and ink return blade enclosure mounted below the blade clamp; the enclosure is a hollow cuboid frame, with fixing clips at both ends of the Y-axis slide rail, the fixing clips securing the enclosure with fixing bolts; the hollow portion of the enclosure is used to install a screen printing plate; a Z-axis slide rail; a first sliding stage slidably connected to the Z-axis slide rail, the other end of the first sliding stage being fixedly connected to the Y-axis slide rail; and an ink replenishment assembly: a liquid level detection sensor is installed inside the ink tank, and when the ink level is below a limit, ink is added to the ink tank through the ink inlet; the ink nozzle is used for timed / command-controlled ink ejection. It can automatically replenish ink, improving printing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of printing press technology, and in particular to an automatic ink replenishment printing press. Background Technology

[0002] Screen printing consists of five main elements: the screen printing plate, the squeegee, the ink, the printing table, and the substrate. The basic principle of screen printing is to utilize the principle that ink passes through the mesh openings of the screen printing plate in the image areas, while ink does not pass through the mesh openings in the non-image areas. During printing, ink is poured onto one end of the screen printing plate, and the squeegee applies pressure to the ink-covered areas while moving towards the other end of the plate. As it moves, the ink is forced from the mesh openings of the image areas onto the substrate. Due to the viscosity of the ink, the print adheres within a certain range. Throughout the printing process, the squeegee maintains line contact with both the screen printing plate and the substrate, and this contact line moves with the squeegee. Because a certain gap is maintained between the screen printing plate and the substrate, the screen printing plate generates a reaction force on the squeegee through its own tension; this reaction force is called the rebound force. Due to the rebound force, the screen printing plate and the substrate only make linear contact, while the rest of the screen printing plate remains detached from the substrate. This causes the ink to break apart from the screen, ensuring dimensional accuracy and preventing smudging of the substrate. When the squeegee has covered the entire plate and is lifted, the screen printing plate also lifts, gently scraping the ink back to its initial position. This completes one printing cycle.

[0003] However, at present, the ink for industrial screen printing machines is added to the screen printing plate manually. This process is time-consuming and labor-intensive, which is not conducive to industrial production. A technology is needed to automatically add ink to the printing machine and improve printing efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an automatic ink replenishment printing machine that automatically adds ink and improves printing efficiency. The technical solution of this utility model to solve the above-mentioned technical problems is as follows: An automatic ink replenishment printing machine, comprising Frame: A reference plate is fixedly connected to the frame; a printing plate is mounted on the reference plate; Y-axis slide rail: A blade holder is slidably connected to the Y-axis slide rail; a doctor blade and a return ink blade are installed below the blade holder; the blade holder is also equipped with a first fine-tuning valve and a second fine-tuning valve for adjusting the initial height position of the doctor blade and the return ink blade; during operation, the blade holder is located above the printing plate, and the sliding area of ​​the blade holder is larger than the printing area distance of the substrate on the printing plate; the blade holder is also equipped with a first cylinder and a second cylinder for driving the doctor blade and the return ink blade to move up and down; The enclosure is a hollow cuboid frame. The Y-axis slide rail has fixing clips at both ends, and the fixing clips fix the enclosure with fixing bolts. The hollow part of the enclosure is used to install the screen printing plate. Z-axis slide rail: A first sliding table is slidably connected to the Z-axis slide rail. The other end of the first sliding table is fixedly connected to the Y-axis slide rail. The first sliding table is used to drive the Y-axis slide rail to move up and down along the Z-axis slide rail. Ink replenishment assembly: The ink replenishment assembly includes an ink tank holder, which is fixedly connected to the side of the fixing clamp away from the enclosure. An ink tank is fixed on the ink tank holder. The ink tank is provided with an ink inlet and an ink nozzle. The ink inlet is connected to an external ink source, and the ink nozzle faces the screen printing plate. A liquid level detection sensor is installed inside the ink tank. When the ink level is lower than the limit, ink is added to the ink tank through the ink inlet. The ink nozzle is used for timed / command-controlled ink ejection.

[0005] The basic principles and beneficial effects of this scheme: The reference plate fixed above the frame provides support for the entire device, and the printing table is used to hold the substrate (such as paper, board, etc.).

[0006] The blade holder on the Y-axis slide rail carries a squeegee and a back-ink blade, enabling reciprocating movement along the Y-axis. The enclosure is secured by clamps at both ends, forming a frame structure. Its hollow section is used to mount and position the screen printing plate, the key mold for pattern transfer. During operation, the first cylinder controls the squeegee to press downwards against the screen printing plate, transferring ink through the mesh onto the substrate, completing the printing process. The second cylinder controls the back-ink blade to scrape the ink back to its starting position during its return stroke, preparing for the next printing. First and second fine-tuning valves precisely adjust the height of the two blades to control printing pressure and back-ink effect.

[0007] The ink replenishment component is located next to the fixing clamp on one side. It mainly adds ink through control commands or timed replenishment. The ink tank is equipped with a liquid level sensor. If the ink level drops below the threshold, ink is automatically added to the ink tank through the ink inlet.

[0008] This solution, through a liquid level sensor and automatic nozzles, solves the pain point of frequent interruptions in screen printing for manual ink refilling. It reduces downtime and is particularly suitable for long-term, high-volume continuous automated production, significantly improving overall production efficiency.

[0009] Ensuring consistent printing quality: Fluctuations in the amount and location of manual ink addition can lead to inconsistent ink density and thickness across printed products. An automatic ink replenishment system adds ink at precise times, quantities, and locations, ensuring the ink level on the screen remains optimal and stable, thus guaranteeing high consistency and reliability of the entire batch of printed products.

[0010] Reduced labor costs and workload: Operators no longer need to constantly monitor ink levels and manually add ink. One person can oversee multiple machines simultaneously, reducing reliance on skilled workers and labor intensity, and saving labor costs.

[0011] Reduce ink waste and environmental pollution: Automated and precise ink addition avoids waste such as dripping and splattering that can occur during manual ink addition. At the same time, closed or semi-automated addition processes reduce organic solvent evaporation and improve the workshop working environment compared to fully open manual operations.

[0012] High structural integration and good synchronization: The ink replenishment components (ink tank, nozzle) are directly mounted on the fixing clamp, making it a unified moving unit with the screen printing plate. This ensures that the ink replenishment system always maintains the correct relative position with the screen regardless of its height, guaranteeing the accuracy of inkjet positioning and resulting in a compact and reasonable structure.

[0013] Furthermore, it also includes an X-axis slide rail, which is disposed on both sides of the Y-axis slide rail, and the printing table is slidably connected to the X-axis slide rail.

[0014] The basic principle and beneficial effects of this solution: The added X-axis slide rail facilitates the entry and exit of the printing table. The substrate to be printed is placed on the printing table and transported to the bottom of the screen printing plate via the X-axis slide rail. After printing, it is then transported out, making it convenient to replace the substrate.

[0015] Furthermore, the X-axis slide rail is provided with two layers of non-interfering slide tracks, and each slide track is slidably connected to a printing platform.

[0016] Beneficial effects: By setting up multiple printing stations, the time wasted during the substrate exit gap can be reduced. When one printing station exits, another printing station is ready to go. When it is completely out of the printing range, another printing station enters the printing position and starts printing. At this time, the exiting printing station starts to replace the new substrate, completing the replacement of the substrate and saving waiting time.

[0017] Furthermore, an operating console is also provided on the frame.

[0018] Beneficial effects: The central control panel with integrated operation buttons is used to display the current processing status and adjust processing parameters, etc.

[0019] Furthermore, the printing platform is provided with several negative pressure holes, which are used to generate negative pressure suction on the surface of the printing chamber to fix the printing substrate.

[0020] Beneficial effects: It helps to fix the substrate in place and prevents it from shifting, which would affect the printing effect.

[0021] Furthermore, the ink replenishment assembly also includes an ink cavity, in which a pressing plate is slidably connected, and the pressing plate floats on the ink within the ink cavity.

[0022] Beneficial effect: Prevents ink from sloshing around inside the ink chamber.

[0023] Furthermore, a third cylinder is fixed to the top of the ink chamber, and the free end of the third cylinder is fixedly connected to the top of the pressing plate.

[0024] Beneficial effect: By limiting the reciprocating path of the pressing plate through the cylinder rod of the third cylinder, it can be moved up and down in the vertical direction.

[0025] Furthermore, an ink storage chamber and a tool chamber are arranged around the ink cavity. An ink pump is installed in the tool chamber. The inlet of the ink pump is connected to the ink inlet port, and the outlet of the ink pump is connected to an ink inlet pipe. The other end of the ink inlet pipe extends into the ink cavity. The ink storage chamber is located on the side close to the ink nozzle. The ink storage chamber is connected to both the ink cavity and the nozzle. The highest value of the liquid level in the ink storage chamber is lower than the height of the lower limit position where the pressing plate can be lowered.

[0026] Beneficial effect: It ensures the amount of ink in the ink storage chamber, thus guaranteeing the ink supply to the ink nozzles.

[0027] Furthermore, it also includes a stirring assembly, which includes a stirring motor disposed outside the ink chamber, a stirring shaft externally connected to the stirring motor and extending into the ink chamber, the stirring shaft being coaxial with both the ink chamber and the pressing plate, a stirring blade being coaxially fixed at the other end of the stirring shaft, and a balance seat being fixed on the end face of the stirring shaft near the stirring blade, the balance seat being conical from top to bottom, and the bottom of the balance seat being rotatably connected to the bottom of the ink chamber.

[0028] Beneficial effects: The balance seat is rotatably connected to the bottom of the ink chamber, which completes the limit of the rotating shaft, prevents the rotating shaft from shifting during rotation, and ensures the stability of the equipment.

[0029] Furthermore, a filter screen is provided between the ink cavity and the ink storage chamber.

[0030] Beneficial effects: Effectively prevents ink residue or impurities from equipment wear from entering the ink storage chamber and clogging the ink nozzles. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram of a specific embodiment of the present utility model; Figure 2 This is a front view structural diagram of a specific embodiment of the present utility model; Figure 3 This is a schematic diagram of the structure of an ink replenishment assembly according to a specific embodiment of the present invention; Figure 4 for Figure 3 Schematic diagram of the cross section of AA; Figure 5 for Figure 4 Cross-sectional view of BB (stirring mechanism not shown).

[0032] The attached diagram lists the components represented by each number as follows: 1. Frame; 2. Reference plate; 21. Operating table; 31. X-axis slide rail; 32. Z-axis slide rail; 33. Y-axis slide rail; 34. Tool holder; 351. Doctor blade; 352. Ink return blade; 361. First cylinder; 362. Second cylinder; 37. Fixing clamp; 371. Fixing bolt; 38. Enclosure; 41. Ink tank holder; 42. Stirring motor; 43. Ink inlet; 44. Ink nozzle; 45. Stirring shaft; 46. Ink pump; 461. Ink inlet pipe; 47. Stirring blade; 48. Balance seat; 49. Filter screen; 5. Printing table; 51. Negative pressure hole; 61. Third cylinder; 62. Pressing plate; 7. Ink storage chamber. Detailed Implementation

[0033] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0034] In the description of this invention, it should be understood that the terms "center," "length," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "inner," "outer," "circumferential," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the system or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] like Figure 1 , Figure 2 , Figure 3, Figure 4 and Figure 5 As shown, an automatic ink replenishment printing machine includes... Frame: A reference plate is fixedly connected to the frame; a printing plate is mounted on the reference plate; Two X-axis slide rails are fixed opposite each other on the reference plate, and a printing platform is slidably connected to the X-axis slide rails, as shown in the attached figure. Figure 1 As shown, the printing plate is provided with multiple negative pressure holes and an air extraction port for providing negative pressure to the printing plate. In this solution, the X-axis slide rail has two layers of non-interfering slide tracks, and each slide track is slidably connected to a printing plate. Figure 1 Only one printing plate is shown in the image; the other is not shown.

[0038] Y-axis slide rail: A blade holder is slidably connected to the Y-axis slide rail; a doctor blade and a return ink blade are installed below the blade holder; the blade holder is also equipped with a first fine-tuning valve and a second fine-tuning valve for adjusting the initial height position of the doctor blade and the return ink blade; during operation, the blade holder is located above the printing plate, and the sliding area of ​​the blade holder is larger than the printing area distance of the substrate on the printing plate; the blade holder is also equipped with a first cylinder and a second cylinder for driving the doctor blade and the return ink blade to move up and down; during printing, the doctor blade first scrapes the ink from right to left, at which time the return ink blade is suspended, and the ink is printed on the substrate through the mesh of the screen printing plate. After the leftward stroke is completed, the doctor blade is suspended under the control of the first cylinder, and the return ink blade descends to scrape the ink back to its original position, facilitating the next printing.

[0039] Enclosure: The enclosure is a hollow cuboid frame. Fixing clips are installed at both ends of the Y-axis slide rail, and the enclosure is fixed by fixing bolts. The hollow part of the enclosure is used to install the screen printing plate. The main function of the enclosure is to prevent ink from overflowing outside the screen printing plate. The screen printing plate and the enclosure can be designed as an integrated unit and replaced as a whole when in use.

[0040] Z-axis slide rail: A first sliding table is slidably connected to the Z-axis slide rail. The other end of the first sliding table is fixedly connected to the Y-axis slide rail. The first sliding table is used to drive the Y-axis slide rail to move up and down along the Z-axis slide rail. The movement of the first sliding table, printing table, and knife holder can all be driven by a suitable type of lead screw motor or cylinder.

[0041] Ink replenishment assembly: The ink replenishment assembly includes an ink tank holder, which is fixedly connected to the side of the fixing clamp away from the enclosure. An ink tank is fixed on the ink tank holder, and the ink tank is provided with an ink inlet and an ink nozzle. The ink inlet is connected to an external ink source, and the ink nozzle faces the screen printing plate. A liquid level detection sensor is installed inside the ink tank. When the ink level is lower than the limit, ink is added to the ink tank through the ink inlet. The ink nozzle is used for timed / command-controlled ink spraying. The ink printhead in this solution is a high-pressure printhead. It can be automatically sprayed by adjusting the spray distance and setting a timing mechanism (such as a timed valve, which connects the ink nozzle and the ink storage chamber for a certain period of time and closes it at other times). The ink spraying timing is when the doctor blade is in the left extreme position to prevent ink from being sprayed directly onto the return ink blade.

[0042] As attached Figure 4-5 As shown, the ink replenishment assembly also includes an ink chamber, within which a pressing plate is slidably connected. The pressing plate floats on the ink within the ink chamber. A third cylinder is fixed to the top of the ink chamber, and the free end of the third cylinder is fixedly connected to the top of the pressing plate. The height of the pressing plate increases with the height of the ink, and the third cylinder only serves a guiding function.

[0043] The ink chamber is surrounded by an ink storage chamber and a tool chamber. The tool chamber is equipped with an ink pump. The inlet of the ink pump is connected to the ink inlet, and the outlet of the ink pump is connected to an ink inlet pipe. The other end of the ink inlet pipe extends into the ink chamber. The ink storage chamber is located on the side close to the ink nozzle. The ink storage chamber is connected to both the ink chamber and the nozzle. The highest value of the ink level in the ink storage chamber is lower than the height of the lower limit position where the pressing plate can be lowered.

[0044] The system also includes a stirring assembly, which comprises a stirring motor disposed outside the ink chamber. The stirring motor has an external stirring shaft extending into the ink chamber. The stirring shaft is coaxial with both the ink chamber and the pressing plate, and the stirring shaft and the pressing plate are rotatably connected. A stirring blade is coaxially fixed to the other end of the stirring shaft. A balance seat is fixed to the end face of the stirring shaft near the stirring blade. The balance seat is conical from top to bottom, and its bottom is rotatably connected to the bottom of the ink chamber. A filter screen is installed between the ink chamber and the ink storage chamber. An operating panel is also provided on the frame to accommodate control buttons for easy operation of the equipment.

[0045] In some embodiments, the third cylinder is inflated to press the contact between the pressing plate and the ink surface, preventing the ink from sloshing during up-and-down movement.

[0046] In some embodiments, the ink holder is mounted on the frame, and the ink storage chamber and the ink printhead are connected by an external pipe. The ink printhead is mounted on a fixed clamp.

[0047] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An ink auto-replenishing printer characterized by: include Frame (1): A reference plate (2) is fixedly connected to the frame (1); a printing plate (5) is installed on the reference plate (2); Y-axis slide rail (33): A blade holder (34) is slidably connected to the Y-axis slide rail (33); a doctor blade (351) and a back-ink blade (352) are installed below the blade holder (34); the blade holder (34) is also provided with a first fine-tuning valve and a second fine-tuning valve for adjusting the initial height position of the doctor blade (351) and the back-ink blade (352); during operation, the blade holder (34) is located above the printing plate (5), and the sliding area of ​​the blade holder (34) is greater than the printing interval distance of the substrate on the printing plate (5); the blade holder (34) is also provided with a first cylinder (361) and a second cylinder (362) for driving the doctor blade (351) and the back-ink blade (352) to move up and down; Enclosure (38): The enclosure (38) is a hollow cuboid frame. The Y-axis slide rail (33) is equipped with fixing clips (37) at both ends. The fixing clips (37) fix the enclosure (38) by fixing bolts (371). The hollow part of the enclosure (38) is used to install the screen printing plate. Z-axis slide rail (32): A first sliding table is slidably connected on the Z-axis slide rail (32). The other end of the first sliding table is fixedly connected to the Y-axis slide rail (33). The first sliding table is used to drive the Y-axis slide rail (33) to move up and down along the Z-axis slide rail (32). Ink replenishment assembly: The ink replenishment assembly includes an ink tank holder (41), which is fixedly connected to the side of the fixing clamp (37) away from the enclosure (38). An ink tank is fixed on the ink tank holder (41). The ink tank is provided with an ink inlet (43) and an ink nozzle (44). The ink inlet (43) is connected to an external ink source. The ink nozzle (44) faces the screen printing plate. A liquid level detection sensor is provided inside the ink tank. When the ink level is lower than the limit, ink is added to the ink tank through the ink inlet (43). The ink nozzle (44) is used for timed / command-controlled ink spraying.

2. An ink self-replenishing printer according to claim 1, wherein: It also includes an X-axis slide rail (31), which is arranged on both sides of the Y-axis slide rail (33), and the printing table (5) is slidably connected to the X-axis slide rail (31).

3. An ink self-replenishing printer according to claim 2, wherein: The X-axis slide rail (31) is provided with two layers of non-interfering slides, and each slide is slidably connected to a printing platform (5).

4. The ink self-replenishing printer of claim 1, wherein: An operating table (21) is also provided on the frame (1).

5. An ink self-replenishing printer according to any one of claims 1 to 4, wherein: The printing table (5) is provided with several negative pressure holes (51) for generating negative pressure suction on the table surface of the working chamber to fix the printing substrate.

6. An ink self-replenishing printer according to claim 1, wherein: The ink replenishment assembly also includes an ink cavity, in which a pressing plate (62) is slidably connected, and the pressing plate (62) floats on the ink in the ink cavity.

7. An ink self-replenishing printer according to claim 6, wherein: A third cylinder (61) is fixed to the top of the ink chamber, and the free end of the third cylinder (61) is fixedly connected to the top of the pressing plate (62).

8. An ink self-replenishing printer according to claim 7, wherein: The ink chamber is surrounded by an ink storage chamber (7) and a tool chamber. The tool chamber is equipped with an ink pump (46). The inlet of the ink pump (46) is connected to the ink inlet (43), and the outlet of the ink pump (46) is connected to an ink inlet pipe (461). The other end of the ink inlet pipe (461) extends into the ink chamber. The ink storage chamber (7) is located on the side near the ink nozzle (44). The ink storage chamber (7) is connected to both the ink chamber and the nozzle. The highest value of the liquid level in the ink storage chamber (7) is lower than the height of the lower limit position that the pressing plate (62) can descend.

9. An ink self-replenishing printer according to claim 7, wherein: It also includes a stirring assembly, which includes a stirring motor (42) disposed outside the ink chamber. The stirring motor (42) is externally connected to a stirring shaft (45) that extends into the ink chamber. The stirring shaft (45) is coaxial with the ink chamber and the pressing plate (62) respectively. A stirring blade (47) is coaxially fixed at the other end of the stirring shaft (45). A balance seat (48) is fixed on the end face of the stirring shaft (45) near the stirring blade (47). The balance seat (48) is conical from top to bottom. The bottom of the balance seat (48) is rotatably connected to the bottom of the ink chamber.

10. An ink self-replenishing printer according to claim 9, wherein: A filter screen (49) is provided between the ink cavity and the ink storage chamber (7).

Images