Printing ink coating device

Abstract

The utility model discloses an ink coating device, which relates to the technical field of spraying and comprises a base, a rotating mechanism and at least three ink coating mechanisms, the rotating mechanism comprises a rotating disc and at least two placing bases capable of containing pieces to be smeared, the rotating disc is rotatably arranged on the base, the two placing bases are arranged on the rotating disc in a spaced mode, and the rotating disc is used for driving the placing bases to move; the three ink coating mechanisms are movably arranged on the base and are arranged corresponding to the side walls, back on to the other containing base, of one containing base, and the ink coating mechanisms can coat the to-be-coated piece with ink.

Description

Technical Field

[0001] This utility model relates to the field of spraying technology, and in particular to an ink coating device. Background Technology

[0002] In the monitor industry, especially in the production of borderless full-screen products, light leakage from the sides of the LCD screen is often encountered due to issues with the assembly precision of the frame. To solve this problem, the industry typically employs two methods: one is automated glue dispensing, but this increases the cost per LCD screen; the other is an ink coating process, where black ink is manually applied to the left, right, and top edges of the monitor using a black ink pen, utilizing the opacity of the ink coating to prevent light leakage. However, manual ink coating is inefficient and difficult to meet the needs of large-scale production.

[0003] To improve ink coating efficiency, automated ink coating devices have emerged in related technologies. These devices typically include a frame, an ink application section, and a placement structure. The ink application section is movable relative to the frame, while the placement structure, located on the frame, holds the workpiece to be coated. During the ink coating process, the placement structure rotates the workpiece, and the ink application section sequentially applies ink to each side. Once all three sides are coated, the ink coating operation is complete. However, this type of device requires a significant amount of time during the ink coating process, resulting in low ink coating efficiency and making it difficult to meet the demands of high-volume production. Utility Model Content

[0004] The main objective of this invention is to provide an ink coating device that aims to improve the ink coating efficiency of the device.

[0005] To achieve the above objectives, the ink coating device proposed in this utility model includes:

[0006] Base;

[0007] A rotating mechanism, comprising a turntable and at least two placement seats for accommodating a workpiece, the turntable being rotatably mounted on a base, the two placement seats being spaced apart from the turntable, and the turntable being used to move each of the placement seats; and

[0008] At least three ink-coating mechanisms are provided, which are movably mounted on the base and respectively disposed on the side walls of one of the placement seats facing away from the other placement seat. The ink-coating mechanisms are capable of applying ink to the workpiece to be coated. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0010] Figure 1 A schematic diagram of an embodiment of the ink coating device of this utility model is provided;

[0011] Figure 2 A top view of an embodiment of the ink coating device of this utility model is provided;

[0012] Figure 3 A schematic diagram of a structural embodiment of the present invention showing the cooperation between the rotating mechanism and the ink coating mechanism;

[0013] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0014] Figure 5 A schematic diagram of an embodiment of the ink coating mechanism of this utility model is provided;

[0015] Figure 6 for Figure 5 A magnified view of a section at point B.

[0016] Explanation of icon numbers:

[0017] 100. Ink coating device; 1. Base; 2. Rotating mechanism; 21. Turntable; 211. Notch; 22. Placement seat; 221. Suction cup; 222. Detection hole; 3. Ink coating mechanism; 31. X-axis motion module; 32. Y-axis motion module; 33. Z-axis motion module; 34. Ink coating assembly; 341. Pen body; 342. Pen tip; 343. Ink storage unit; 344. Ink supply port; 35. Rotary motor; 36. Ink supply assembly; 361. Ink storage container; 362. Pressure pump; 4. Positioning mechanism; 41. Fixing block; 42. Forward screw; 43. Reverse screw; 44. Coupling; 45. Handle; 46. Positioning assembly; 461. First drive component; 462. Second drive component; 463. Limit block; 5. Product detection sensor.

[0018] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0020] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0021] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] This utility model proposes an ink coating device 100.

[0023] Please see Figures 1 to 6 In one embodiment of this utility model, the ink coating device 100 includes a base 1, a rotating mechanism 2, and at least three ink coating mechanisms 3. The rotating mechanism 2 includes a turntable 21 and at least two placement seats 22 that can accommodate the workpiece to be coated. The turntable 21 is rotatably disposed on the base 1, and the two placement seats 22 are spaced apart from the turntable 21. The turntable 21 is used to drive each placement seat 22 to move. The three ink coating mechanisms 3 are movably disposed on the base 1 and are respectively disposed opposite to the side walls of one placement seat 22 and facing away from the other placement seat 22. The ink coating mechanism 3 can coat ink onto the workpiece to be coated.

[0024] In this utility model, the operator places the workpiece to be coated on one of the placement seats 22, while three ink coating mechanisms 3 apply ink to the three sides of the workpiece on another placement seat 22. After the previous workpiece is finished being inkned, the rotating mechanism 2 rotates, moving the previously inkned workpiece away from the ink coating position and simultaneously moving the next workpiece to be coated to the ink coating position. This process is repeated to complete the ink coating operation on multiple workpieces. The three ink coating mechanisms 3 are respectively arranged corresponding to the side walls of one of the placement seats 22, enabling simultaneous ink coating on the three sides of the workpiece, further shortening the ink coating time and making the ink coating operation cycle shorter, thereby increasing the ink coating efficiency of the ink coating device 100. The turntable 21 is rotatably mounted on the placement seat 22 and can be driven by a drive motor or a pneumatic slip ring; this utility model does not limit this. The placement seats 22 can be arranged in two or three spaced apart; this utility model also does not limit this.

[0025] To further improve the ink coating efficiency of the device, please refer to [link / reference]. Figure 2 and Figure 3 In one embodiment of this utility model, the rotating mechanism 2 is provided with three placement seats 22, which are spaced apart from the turntable 21. The rotating mechanism 2 has three placement seats 22, each corresponding to a different functional area. One placement seat 22 serves as a pick-and-place area for manually placing and removing the LCD screen; another serves as an inking area for applying ink to the LCD screen; and the third serves as a drying area for drying the inked LCD screen. The three placement seats 22 are evenly distributed on the turntable 21, with each placement seat 22 spaced 120° apart. This design allows the LCD screen to be transferred from one workstation to the next with each 120° rotation of the turntable 21, thus achieving a continuous production flow. In the actual operation of the device, the operator places the workpiece to be coated in the pick-and-place area, while three inking mechanisms 3 apply ink to the workpiece in the ink coating area. After the ink is applied, the product is dried in the drying area. When the ink coating mechanism 3 finishes applying ink to the previous workpiece, the turntable 21 rotates 120°, and the previous ink-coated product enters the drying area, while the next workpiece enters the ink coating area. This greatly improves the efficiency of the ink coating operation. At the same time, the device only requires one person to operate, reducing labor costs. Moreover, through the precise control of the mechanical mechanism, the ink coating is more uniform, avoiding the unevenness that may occur with manual ink coating.

[0026] Specifically, please refer to Figure 2In one embodiment of this utility model, the turntable 21 is provided with at least two notches 211 spaced apart, and each of the placement seats 22 is located between any two adjacent notches 211; wherein the two ink coating mechanisms 3 are located within the two adjacent notches 211. The purpose of providing notches 211 on the turntable 21 is to provide installation space for the ink coating mechanism 3 structurally, without affecting the rotation function of the turntable 21. The ink coating mechanism 3 is movably mounted on the base 1. When the turntable 21 rotates, the ink coating mechanism 3 can avoid the turntable 21. When the turntable 21 stops rotating, the ink coating mechanism 3 moves and performs ink coating operation on the workpiece to be coated on the placement seat 22 in the ink coating area. This design can reduce the overall footprint of the equipment and improve the compactness of the equipment, making it suitable for use in limited production spaces. The ink coating mechanism 3 is located within the notches 211, allowing it to be closer to the liquid crystal on the placement seat 22. The closer the ink coating mechanism 3 is to the workpiece to be coated, the more precise the ink coating process can be controlled, avoiding uneven ink coating caused by excessive distance. When two placement seats 22 are set, the turntable 21 has two notches 211 spaced apart. When three placement seats 22 are set, the turntable 21 has three notches 211, which can be set according to actual needs. By reasonably arranging the ink coating mechanism 3 and the placement seats 22, it can be ensured that the LCD screen can complete the ink coating operation quickly and accurately during rotation, thereby improving the overall production efficiency of the equipment.

[0027] For compatibility with different sized parts to be coated, please refer to [link / reference]. Figure 3 and Figure 4In one embodiment of this utility model, the ink coating device 100 includes a positioning mechanism 4. The positioning mechanism 4 includes two fixing blocks 41, a forward-rotating lead screw 42, a reverse-rotating lead screw 43, a coupling 44, a handle 45, and two positioning components 46. The two fixing blocks 41 are spaced apart from the base 1. The two ends of the coupling 44 are respectively connected to the forward-rotating lead screw 42 and the reverse-rotating lead screw 43. The forward-rotating lead screw 42 and the reverse-rotating lead screw 43 are rotatably connected to the two fixing blocks 41 respectively. The handle 45 is connected to the end of one of the forward-rotating lead screw 42. The two positioning components 46 are threadedly connected to the reverse-rotating lead screw 43 and the forward-rotating lead screw 42 respectively, and are slidably connected to the two fixing blocks 41 respectively. The two positioning components 46 can limit the position of the workpiece to be coated on a placement seat 22. The main function of the positioning mechanism 4 is to fix and limit the workpiece to be coated, so that it remains stable during the ink coating process and avoids uneven or failed ink coating due to positional displacement. This design is particularly suitable for scenarios that need to process workpieces of various sizes, and can improve the versatility and flexibility of the equipment. Two fixing blocks 41 are spaced apart on the base 1 to provide a mounting base for the forward-rotating screw 42 and the reverse-rotating screw 43, and to ensure the stability of the entire positioning mechanism 4. The forward-rotating screw 42 and the reverse-rotating screw 43 are connected by a coupling 44. By rotating the handle 45, the forward-rotating screw 42 and the reverse-rotating screw 43 can rotate synchronously or in opposite directions, thereby driving the positioning component 46 to move closer or further away from each other. The positioning component 46 limits the workpiece to be coated on the placement seat 22 to ensure that it remains fixed during the ink coating process.

[0028] Further, please refer to Figure 3 and Figure 4In one embodiment of this utility model, each positioning component 46 includes a first driving member 461, a second driving member 462, and a limiting block 463. The two first driving members 461 are respectively threadedly connected to the counter-rotating lead screw 43 and the forward rotating lead screw 42, and are respectively slidably connected to the two fixing blocks 41. The output end of each first driving member 461 is connected to a second driving member 462, and the output end of each second driving member 462 is connected to a limiting block 463. The two limiting blocks 463 limit the position of the part to be coated on the placement seat 22. Two first driving components 461 are threadedly connected to the counter-rotating lead screw 43 and the forward-rotating lead screw 42, respectively. Simultaneously, the first driving component 461 is slidably connected to the fixed block 41. Through its threaded connection to the lead screw, the first driving component 461 converts the rotational motion of the lead screw into its own linear motion. This linear motion allows the first driving component 461 to move along the axial direction of the lead screw, thereby adjusting the overall position of the positioning assembly 46. During actual operation, the operator manually removes the previously coated product and places the next product to be coated onto the placement seat 22 in the pick-and-place area. Simultaneously, the first driving component 461 drives the second driving component 462 to move upwards towards the placement seat 22, and the second driving component 462 drives the limiting block 463 to move towards the placement seat 22 to limit the movement of the next product to be coated. Once the workpiece to be coated is placed, the first drive component 461 drives the second drive component 462 to move downward away from the placement seat 22. The second drive component 462 drives the limiting block 463 to move away from the placement seat 22 to avoid the rotation of the turntable 21. This operation is repeated to limit all the workpieces to be coated, ensuring that the subsequent ink coating mechanism 3 can accurately apply ink to the workpieces. The limiting block 463 is the end actuating component of the positioning component 46. The limiting block 463 achieves precise positioning and fixation by contacting the workpiece to be coated, preventing displacement of the workpiece during the ink coating process. In one embodiment, the limiting block 463 can be made of silicone to avoid damaging the workpiece when in contact with it, thereby improving the reliability and stability of the product quality.

[0029] Specifically, please refer to Figure 5 and Figure 6In one embodiment of this utility model, each of the ink coating mechanisms 3 includes an X-axis motion module 31, a Y-axis motion module 32, a Z-axis motion module 33, an ink coating assembly 34, and a rotary motor 35. The X-axis motion module 31 is disposed on the base 1. The execution end of the X-axis motion module 31 is connected to the Z-axis motion module 33. The execution end of the Z-axis motion module 33 is connected to the Y-axis motion module 32. The rotary motor 35 is connected to the execution end of the Y-axis motion module 32. The drive end of the rotary motor 35 is connected to the ink coating assembly 34. The X-axis motion module 31 is responsible for horizontal movement along the X-axis. Its actuator is connected to the Z-axis motion module 33. The movement of the X-axis motion module 31 allows the ink coating assembly 34 to adjust its position horizontally to accommodate different sized workpieces or to complete side ink coating. The Z-axis motion module 33 is responsible for vertical movement along the Z-axis. Its actuator is connected to the Y-axis motion module 32. The movement of the Z-axis motion module 33 allows the ink coating assembly 34 to adjust its position vertically, ensuring precise contact with the side of the workpiece. The Y-axis motion module 32 is responsible for forward and backward movement along the Y-axis. Its actuator is connected to the rotary motor 35. The movement of the Y-axis motion module 32 allows the ink coating assembly 34 to adjust its position forward and backward, enabling it to extend into the side of the workpiece and apply ink. The rotary motor 35 drives the ink coating assembly 34 to rotate. The motion mechanism 3 is achieved by connecting the drive end of the rotary motor 35 to the ink coating assembly 34. Driven by the rotary motor 35, the ink coating assembly 34 can rotate and apply ink to the side of the workpiece, ensuring uniform ink application. The ink coating assembly 34 directly contacts the workpiece to complete the ink application. Connected to the drive end of the rotary motor 35, the ink coating assembly 34 is the end-effector of the ink coating mechanism 3, responsible for uniformly applying ink to the side of the workpiece. Through the motion modules of the X, Y, and Z axes, the ink coating mechanism 3 can achieve precise movement in three-dimensional space, ensuring the accuracy of the ink application position. This design can adapt to workpieces of different sizes and shapes, improving the versatility and flexibility of the equipment. The addition of the rotary motor 35 enables the ink coating assembly 34 to rotate and apply ink to the side of the workpiece, ensuring uniform ink application and improving ink coating quality. The entire ink coating process can be controlled by a program to achieve automated operation, reduce manual intervention, and improve production efficiency.

[0030] Further, please refer to Figure 6In one embodiment of the present invention, each of the ink coating components 34 includes a pen body 341 and a pen tip 342. The pen body 341 is connected to the drive end of the rotary motor 35, and the pen tip 342 is elastically connected to the pen body 341. One end of the pen tip 342 away from the pen body 341 is provided with an ink storage part 343. An ink supply channel is formed in the pen tip 342. One end of the ink supply channel is connected to the ink storage part 343, and the other end passes through the pen tip 342 to form an ink supply port 344. The pen body 341 is connected to the drive end of the rotary motor 35. The pen body 341 is the main structure of the inking assembly 34, serving as a support and connector. It transmits the power of the rotary motor 35 to the pen tip 342, ensuring that the pen tip 342 can rotate and apply ink to the side of the workpiece. The pen tip 342 is elastically connected to the pen body 341. The pen tip 342 is the end part of the inking assembly 34 and directly contacts the workpiece. The elastic connection design provides a buffer when the pen tip 342 contacts the workpiece, preventing damage or uneven ink application due to hard contact. The elastic connection can adapt to surfaces of different shapes and sizes, ensuring good contact between the pen tip 342 and the side of the workpiece. The elastic design also reduces the impact of mechanical vibration or uneven surfaces, improving the stability and uniformity of ink application. The ink reservoir 343 is located at the end of the pen tip 342 furthest from the pen body 341, used to store a certain amount of ink. The pen tip 342 ensures sufficient ink supply during the ink application process. An ink supply channel is formed inside the pen tip 342, with one end connected to the ink reservoir 343 to receive ink, and the other end penetrating the pen tip 342 and connecting to the ink supply port 344. This channel allows ink to flow from the ink reservoir 343 to the workpiece, ensuring smooth and uniform ink flow. The design of the ink reservoir 343 and the ink supply channel ensures uniform and continuous ink flow, avoiding ink quality issues caused by uneven ink supply. The flexible connection between the pen tip 342 and the pen body 341 adapts to workpieces of different shapes and sizes, improving the equipment's versatility and flexibility. The combination of the flexible connection and rotational motion reduces the impact of mechanical vibration or surface unevenness, improving the stability and uniformity of ink application. The design of the ink reservoir 343 reduces downtime for maintenance due to ink supply interruptions, improving equipment operating efficiency.

[0031] Furthermore, please refer to Figure 5In one embodiment of this utility model, each of the inking mechanisms 3 further includes an ink supply component 36. The ink supply component 36 includes an ink storage container 361, an ink supply pipeline, and a pressure pump 362. The ink supply pipeline connects the ink storage container 361 and the ink supply port 344, and the pressure pump 362 is located within the ink supply pipeline. The ink storage container 361 stores a certain amount of ink to ensure a continuous supply of ink during the inking process. The ink storage container 361 is connected to the ink supply port 344 of the inking component 34 via the ink supply pipeline. The capacity of the ink storage container 361 is designed to meet the ink demand of the inking mechanism 3 within a certain time period, avoiding downtime caused by frequent ink replenishment. The ink supply pipeline serves as the ink delivery channel, transporting the ink from the ink storage container 361 to the ink supply port 344 of the inking component 34. One end is connected to the ink storage container 361, and the other end is connected to the inking component 34. The ink supply port 344 and the pressure pump 362 are installed in the ink supply pipeline. The ink supply pipeline needs to ensure that the ink can flow smoothly and evenly to avoid blockage or leakage. The pressure pump 362 provides power for ink delivery, ensuring that the ink can reach the ink coating assembly 34 at appropriate pressure and flow. The pressure pump 362 can adjust the ink delivery pressure and flow to ensure uniform ink output during the ink coating process. By controlling the working state of the pressure pump 362, precise control of the ink coating process can be achieved to avoid uneven ink coating caused by unstable ink flow.

[0032] To ensure the workpiece to be coated is stably placed on the placement base 22, please refer to... Figure 4 In one embodiment of this utility model, the ink coating device 100 includes a negative pressure component, and the placement seat 22 is provided with a plurality of suction cups 221 spaced apart, the suction cups 221 being connected to the negative pressure component. The negative pressure component provides negative pressure (vacuum) power for the suction function of the suction cups 221. The suction cups 221 are connected to the negative pressure component and adsorb the workpiece to be coated through negative pressure, making it stably placed on the placement seat 22. The placement seat 22 is provided with a plurality of suction cups 221 spaced apart, these suction cups 221 being evenly distributed on the placement seat 22 to accommodate workpieces of different sizes and shapes. The suction cups 221 are connected to the negative pressure component through pipes or channels, and the negative pressure component provides stable negative pressure, enabling the suction cups 221 to firmly adsorb the workpiece to be coated. Through negative pressure adsorption, the workpiece to be coated is kept fixed on the placement seat 22, avoiding displacement caused by vibration or other external forces during the ink coating process, thereby avoiding uneven ink coating or ink coating failure caused by displacement.

[0033] To improve the reliability of equipment operation, please refer to [link / reference]. Figure 4In one embodiment of this utility model, the ink coating device 100 includes at least two product detection sensors 5. Each product detection sensor 5 is disposed on the base 1 corresponding to a placement seat 22. Each placement seat 22 has a detection hole 222 corresponding to the product detection sensor 5. The product detection sensor 5 is electrically connected to the negative pressure component. The device includes at least two product detection sensors 5, with each placement seat 22 corresponding to one sensor. Each placement seat 22 has a detection hole 222, the position of which corresponds to the product detection sensor 5. The detection hole 222 is used to detect the presence of the workpiece to be coated. The product detection sensor 5 is electrically connected to the negative pressure component to achieve automated linkage control. When the workpiece to be coated is placed on the placement seat 22, the product detection sensor 5 detects the presence of the workpiece through the detection hole 222. If the workpiece to be coated is detected, the product detection sensor 5 sends a signal to the control system. After receiving the signal, the control system starts the negative pressure component. The component to be coated is adsorbed by suction cup 221 and stably fixed on the placement seat 22. If the placement seat 22 is detected to be empty, the product detection sensor 5 sends an empty signal to the control system, and the negative pressure component remains closed to avoid unnecessary energy consumption. The linkage design between the sensor and the negative pressure component realizes automated adsorption and release control, reduces manual intervention, and improves production efficiency. The negative pressure component is only activated when a component to be coated is detected, avoiding unnecessary energy consumption and reducing operating costs. The status of the placement seat 22 is monitored in real time during the ink coating process to avoid equipment failure or operational accidents caused by missing components.

[0034] In one embodiment, the ink coating device further includes an ionizing air bar and an operating table. The operating table is equipped with a start / stop control button and an emergency stop button. The start / stop control button is used to manually start or stop the device operation, and the emergency stop button is used to quickly stop the device operation in an emergency to ensure operational safety. During the ink coating process, the ionizing air bar can blow out ionizing air to eliminate static electricity generated by the friction between the pen tip 342 and the side of the workpiece to be coated. Eliminating static electricity can prevent ink from being unevenly distributed due to static adsorption, thereby improving the uniformity and quality of ink coating. In addition, the ionizing air can blow away dust and impurities on the surface of the workpiece to be coated, ensuring the cleanliness of the ink coating surface.

[0035] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An ink coating device characterized by comprising: include: Base; A rotating mechanism, comprising a turntable and at least two placement seats for accommodating a workpiece, the turntable being rotatably mounted on a base, the two placement seats being spaced apart from the turntable, and the turntable being used to move each of the placement seats; and At least three ink-coating mechanisms are provided, which are movably mounted on the base and respectively disposed on the side walls of one of the placement seats facing away from the other placement seat. The ink-coating mechanisms are capable of applying ink to the workpiece to be coated.

2. The ink applying apparatus of claim 1, wherein The rotating mechanism is provided with three placement seats, which are spaced apart from the turntable.

3. The ink applying apparatus of claim 1, wherein The turntable is provided with at least two notches spaced apart, and each of the placement seats is located between any two adjacent notches; wherein the two ink coating mechanisms are located within the two adjacent notches.

4. The ink applying apparatus of claim 1 wherein, The ink coating device includes a positioning mechanism, which comprises two fixed blocks, a forward-rotating lead screw, a reverse-rotating lead screw, a coupling, a handle, and two positioning components. The two fixed blocks are spaced apart on the base. The two ends of the coupling are respectively connected to the forward-rotating lead screw and the reverse-rotating lead screw. The forward-rotating lead screw and the reverse-rotating lead screw are rotatably connected to the two fixed blocks respectively. The handle is connected to the end of one of the forward-rotating lead screws. The two positioning components are threadedly connected to the reverse-rotating lead screw and the forward-rotating lead screw respectively, and are slidably connected to the two fixed blocks respectively. The two positioning components can limit the position of the workpiece to be coated on a placement seat.

5. The ink applying apparatus of claim 4, wherein Each of the positioning components includes a first driving member, a second driving member, and a limiting block. The two first driving members are respectively threaded to the counter-rotating screw and the forward rotating screw, and are respectively slidably connected to the two fixing blocks. The output end of each first driving member is connected to a second driving member, and the output end of each second driving member is connected to a limiting block. The two limiting blocks limit the position of the workpiece to be coated on the placement seat.

6. The ink applying apparatus of any one of claims 1 to 5, wherein Each of the ink coating mechanisms includes an X-axis motion module, a Y-axis motion module, a Z-axis motion module, an ink coating assembly, and a rotary motor. The X-axis motion module is mounted on the base. The actuator of the X-axis motion module is connected to the Z-axis motion module. The actuator of the Z-axis motion module is connected to the Y-axis motion module. The rotary motor is connected to the actuator of the Y-axis motion module. The drive end of the rotary motor is connected to the ink coating assembly.

7. The ink applying apparatus of claim 6, wherein Each of the ink-coating components includes a pen body and a pen tip. The pen body is connected to the drive end of the rotary motor, and the pen tip is elastically connected to the pen body. The end of the pen tip away from the pen body is provided with an ink storage part. An ink supply channel is formed inside the pen tip. One end of the ink supply channel is connected to the ink storage part, and the other end passes through the pen tip to form an ink supply port.

8. The ink applying apparatus of claim 7, wherein Each of the inking mechanisms further includes an ink supply assembly, which includes an ink storage container, an ink supply pipeline, and a pressure pump. The ink supply pipeline connects the ink storage container and the ink supply port, and the pressure pump is located in the ink supply pipeline.

9. The ink applying apparatus of any one of claims 1 to 5, wherein The ink coating device includes a negative pressure component, and the placement seat is provided with multiple suction cups at intervals, the suction cups being connected to the negative pressure component.

10. The ink applying apparatus of claim 9, wherein The ink coating device includes at least two product detection sensors, each of which is disposed on the base corresponding to a placement seat, and each placement seat has a detection hole corresponding to the product detection sensor; the product detection sensor is electrically connected to the negative pressure component.

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