Ink adding device and screen printing machine

Abstract

The embodiment of the present invention discloses an ink adding device and a screen printing machine, comprising a frame; a fixed component, which is arranged on the frame; an ink storage container detachably arranged on the fixed component, wherein the inner cavity of the ink storage container is used to store ink, and the ink storage container is provided with an ink outlet connected to the inner cavity; a piston, which is used to seal the inner cavity of the ink storage container and move along the inner circumference of the inner cavity so that the ink flows out from the ink outlet; a propulsion component, which is connected to the piston and is used to drive the piston to move; and a stirring component, which is connected to the fixed component so that the fixed component drives the ink storage container to rotate around a first axial direction relative to the frame. The ink storage container is designed as a replaceable syringe-type container, and the automatic timed and quantitative addition of ink is achieved through the control of the propulsion component and a controller, which can make the ink addition more accurate, reduce human intervention, improve the efficiency of related operations, and ensure printing quality.

Description

Technical Field

[0001] The present invention relates to the technical field of screen printing, and more particularly to an ink adding device and a screen printing machine. Background Art

[0002] A screen printing press is a general term for machines or equipment used to produce printed materials. The printing system primarily consists of ink, a scraper assembly, a screen printing plate, and a printing table. The substrate passes beneath the screen. The ink is permeable to the screen plate with the image, while the mesh without the image is impermeable. The scraper assembly reciprocates across the screen plate. The scraper assembly, consisting of a scraper and a return blade, squeezes the ink through the image onto the substrate. The return blade pushes the ink back to cover the image. The substrate is conveyed by multiple conveyor rollers, one end of which is connected to a stepper motor. The stepper motor rotates the conveyor rollers to match the reciprocating motion of the scraper assembly. Traditional screen printing presses rely on manual intermittent inking, requiring dedicated personnel to regularly and quantitatively add ink. This not only increases labor but also compromises the quality and stability of printed products. Manual intermittent ink adding is extremely inconvenient. The ink volume needs to be adjusted manually every time the machine is shut down or production is changed, and the ink volume needs to be estimated in advance. If there are any quality problems with the ink, it needs to be cleaned and cleared. Manual ink adding is prone to ink leakage, causing ink to seep into the roller, causing waste in production and extending the production cycle. A small number of screen printing machines use automatic ink adding devices, but the ink storage container used in the device is fixed, which is not convenient for cleaning and changing ink. Summary of the Invention

[0003] In view of the above problems, an object of the present invention is to provide an ink adding device that can automatically add ink to a screen printing plate of a screen printing machine in a timely and quantitative manner.

[0004] Another object of the present invention is to provide a screen printing machine having the above-mentioned ink adding device.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] One aspect of the present invention is to provide an ink adding device, comprising:

[0007] frame;

[0008] A fixing component is arranged on the frame;

[0009] an ink storage container, detachably mounted on the fixing assembly, wherein the inner cavity of the ink storage container is used to store ink, and the ink storage container is provided with an ink outlet communicating with the inner cavity;

[0010] a piston for sealing the inner cavity of the ink storage container and moving along the inner circumference of the inner cavity to allow ink to flow out from the ink outlet;

[0011] a propulsion assembly connected to the piston and configured to drive the piston to move; and

[0012] A stirring component is connected to the fixing component, so that the fixing component drives the ink storage container to rotate relative to the frame around a first axial direction.

[0013] In addition, a preferred solution is that the fixing assembly includes a fixing base and a fixing lock;

[0014] The fixed base is rotatably connected to the frame and is used to carry the ink storage container;

[0015] The fixing lock buckle is in an arc shape corresponding to the curvature of the outer wall of the ink storage container, and is detachably connected to the fixing base to fix the ink storage container on the fixing base.

[0016] In addition, a preferred solution is that the fixed base includes a bearing portion for bearing the ink storage container and a fixing portion formed by extending upward from the bearing portion;

[0017] The fixing portion is an arc-shaped plate corresponding to the curvature of the outer wall of the ink storage container. The fixing lock is detachably arranged on the fixing portion. The fixing lock and the fixing portion form a circular ring corresponding to the shape of the outer wall of the ink storage container.

[0018] In addition, a preferred solution is that the propulsion assembly includes a motor and a screw connected to an output end of the motor, the screw extending along a first direction, and the motor can reciprocate along the axis direction of the screw;

[0019] The motor is connected to the piston via a connecting piece and can drive the piston to move along a first direction, so that ink flows out from the ink outlet.

[0020] In addition, a preferred solution is that the propulsion assembly is arranged on the frame through a guide rail assembly, the guide rail assembly includes a guide rail extending along a first direction, the guide rail is fixed on the frame, and the motor is configured on the guide rail through a slider.

[0021] In addition, a preferred solution is that the connecting member includes a connecting seat fixedly coupled to the motor and a connecting column fixedly coupled to an end of the piston away from the ink storage container;

[0022] The connecting column is rotatably connected to the connecting seat, so that the piston can move along the first direction under the drive of the motor, so that the ink flows out from the ink outlet.

[0023] In addition, a preferred solution is that the stirring assembly includes a driving member and a synchronous belt, and the fixed assembly is connected to the output end of the driving member through the synchronous belt, and can rotate along the first axial direction together with the ink storage container under the drive of the driving member.

[0024] Another aspect of the present invention is to provide a screen printing machine, comprising a controller, a scraper device with an ink return knife and the above-mentioned ink adding device, wherein the scraper device and the ink adding device are connected to the controller; the ink return knife and the ink adding device are located above the stage, and the ink outlet of the ink adding device is located at the end position of the ink return knife for returning ink.

[0025] In addition, a preferred solution is that the controller sends a control signal to the ink adding device at a preset time interval, and the ink adding device sprays ink according to the control signal.

[0026] In addition, a preferred solution is that the screen printing machine includes two ink adding devices, and the two ink adding devices are arranged side by side.

[0027] The beneficial effects of the present invention are as follows:

[0028] In response to the technical problems existing in the prior art, the embodiments of the present application provide an ink adding device and a screen printing machine, in which the ink storage container is designed as a replaceable syringe-type container, automatic ink addition is achieved through a propulsion component, and timed and quantitative ink addition is achieved through control of a controller. Compared with manual operation, the ink adding device can control the amount of ink used in a timed and quantitative manner, making ink addition more precise, reducing human intervention, improving the work efficiency of related operations, and ensuring printing quality; by designing the traditional ink storage container as a replaceable syringe-type ink storage container, the traditional method of adding ink to the ink storage container is changed to directly replacing the ink storage container, which can save time for cleaning the ink storage container and changing and loading ink, prevent ink mixing and ink deterioration, and ensure printing quality; in addition, a stirring component is added, which drives the fixed component to rotate the ink storage container through the stirring component, so that the ink in the inner cavity of the ink storage container is evenly mixed through rotation, and the stirring action can be continuously performed, thereby improving the problem of stratification of different components due to long-term storage of ink, and ensuring printing quality; the screen printing machine is provided with two ink adding devices, and the two ink adding devices work alternately without interfering with each other. When one of the ink adding devices is out of material and needs to be replaced, the other ink adding device continues to work and the machine keeps running, thus ensuring production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] Figure 1A schematic structural diagram of an ink adding device provided in an embodiment of the present invention is shown.

[0031] Figure 2 A schematic exploded view of an ink adding device provided by an embodiment of the present invention is shown.

[0032] Figure 3 A side view of an ink adding device provided by an embodiment of the present invention is shown.

[0033] Figure 4 A schematic diagram showing the connection relationship between the stirring component and the fixing component provided in an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0035] In the description of the present invention, unless otherwise specified or limited, the terms "connected," "connected," and "fixed" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integration; they may refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the present invention.

[0036] In the present invention, unless otherwise expressly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact not directly but through another feature between them. In the description of this embodiment, the terms "above", "below", "left", "right" and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0037] Screen printing involves using a silk screen as a base and using a photosensitive platemaking method to create a screen printing plate with images and text. Screen printing consists of five major elements: the screen printing plate, scraper, ink, printing table, and substrate. A screen printing machine, as a piece of equipment for screen printing, typically includes a sliding motor, slide rails, and cylinders. Two scrapers are typically mounted on two corresponding cylinders, which are connected to the sliding motors. The sliding motors move left and right on the slide rails, driving the scrapers across the screen printing plate. The screen printing plate is coated with ink, and the cylinders drive the scrapers up and down, contacting the screen printing plate in turn during the reciprocating printing. This is the basic operating principle of a screen printing machine. However, adding ink to a screen printing machine is generally done manually. First, a portion of ink is manually poured onto the screen printing plate. If the ink level is insufficient during printing, additional ink must be added. This repeating process increases with production volume, requiring more frequent additions. This increases the workload for the operator, and each ink addition requires downtime, significantly impacting production efficiency.

[0038] In order to overcome the technical defects, the embodiment of the present invention provides an ink adding device, combined with Figure 1-4 As shown, the ink adding device includes a frame 1, a fixing assembly 2, an ink storage container 3, a piston 4, a propulsion assembly 5, and a stirring assembly 6. The piston 4 and the ink storage container 3 together form a syringe-type structure. The ink storage container 3 is a syringe-type container. In this embodiment, the ink storage container 3 is used in conjunction with the piston 4 as a syringe-type container. By pushing the piston 4, the ink in the ink storage container 3 flows out and is added to the screen printing plate. Specifically, the inner cavity of the ink storage container 3 stores ink, and the bottom of the ink storage container 3 is provided with an ink outlet 30 connected to the inner cavity. The ink in the inner cavity of the ink storage container 3 can flow out through the ink outlet 30 and be added to the screen printing plate of the screen printing machine. The ink storage container 3 is detachably mounted on the frame 1 via a fixing assembly 2. The ink storage container 3 is a disposable container. When the ink in the ink storage container 3 is used up, the ink storage container 3 can be removed from the fixing assembly 2 and replaced with a new full ink storage container. This design saves time in adding ink to the ink storage container, eliminates the need to clean the ink storage container, and avoids ink mixing.

[0039] In this embodiment, the piston 4 is used in conjunction with the ink container 3 to seal the inner cavity of the ink container 3, creating a sealed space. Driven by the propulsion assembly 5, the piston 4 can move along the inner circumference of the inner cavity, increasing the pressure within the inner cavity above atmospheric pressure, thereby allowing the ink within the inner cavity to flow out of the ink outlet 30 to supply ink to the screen printing machine. In this embodiment, the piston 4 and the ink container 3 are assembled as a single component. When the ink container 3 is replaced, the piston 4 must be replaced together. This prevents the piston from contaminating the ink within the ink container 3 and saves time in cleaning the piston 4. In another embodiment, the piston 4 is not replaced with the ink container 3. Before installing a new ink container 3, the piston 4 must be cleaned of ink contamination.

[0040] In this embodiment, if Figure 1 As shown, the piston 4 is driven by the propulsion assembly 5 and can move along the inner circumference of the inner cavity of the ink storage container 3, applying thrust to the ink in the inner cavity so that the ink flows out from the ink outlet 30 to supply ink to the screen printing machine.

[0041] In this embodiment, if Figure 1 As shown, the stirring component 6 is connected to the fixed component 2, so that the fixed component 2 drives the ink storage container 3 installed on the fixed component 2 to rotate around the first axial direction relative to the frame 1. By rotating the ink storage container 3, the ink in the inner cavity of the ink storage container 3 can be fully mixed through the rotation of the ink storage container 3, thereby avoiding the stratification phenomenon caused by the ink being stationary for a long time, which affects the printing quality.

[0042] In a specific embodiment, in combination Figure 1-3As shown, the fixed assembly 2 includes a fixed base 21 and a fixed lock 22. The fixed base 21 is connected to the frame 1 through a bearing and is rotatably arranged on the frame 1. The stirring assembly 6 is connected to the fixed base 21 and can rotate around the first axial direction under the action of the stirring assembly 6. It can be understood that the first axial direction described in this embodiment is the axial direction of the fixed base 21. The fixed base 21 is used to carry the ink storage container 3, and the fixed lock 22 is detachably connected to the fixed base 21 to fix the ink storage container 3 on the fixed base 21, so that the ink storage container 3 can rotate with the rotation of the fixed base 21, thereby realizing the stirring of the ink in the ink storage container 3. Specifically, the fixing latch 22 is arc-shaped, corresponding to the curvature of the outer wall of the ink container 3. Connecting the fixing latch 22 to the fixed base 21 secures the ink container 3 to the fixed base 21. Because the fixing latch 22 conforms to the curvature of the outer wall of the ink container 3, the ink container 3 remains stable during rotation by the fixed assembly 2, preventing shaking or positional shifting that could affect ink addition. In this embodiment, the fixing latch 22 is connected to the fixed base 21 via a fastener 23. Tightening the fastener 23 secures the ink container 3; loosening the fastener 23 separates the fixing latch 22 from the fixed base 21, facilitating removal of the depleted ink container 3 and replacement with a new one.

[0043] In one embodiment, Figure 2-4 As shown, the fixed base 21 includes a supporting portion 211 for supporting the ink container 3 and a fixing portion 212 extending upward from the edge of the supporting portion 211. The supporting portion 211 includes a mounting recess, into which the ink container 3 is placed. The bottom of the mounting recess includes a through-hole corresponding to the ink outlet 30 of the ink container 3, allowing ink in the inner cavity of the ink container 3 to be added to the screen printing plate of the screen printing press. The bottom of the supporting portion 211 is connected to the frame 1 via a bearing, allowing the fixed base 21 to rotate about a first axial direction driven by the stirring assembly 6. The fixing portion 212 is a curved plate corresponding to the curvature of the outer wall of the ink container 3. A fixing latch 22 is detachably attached to the fixing portion 212. The fixing latch 22 and the fixing portion 212 can enclose a circular ring corresponding to the shape of the outer wall of the ink container 3, confining the ink container 3 between the fixing latch 22 and the fixing portion 212, thereby securing the ink container 3. In this embodiment, the curvature of the fixing portion 212 is semicircular, and accordingly, the fixing lock buckle 22 is a semicircular ring. In other embodiments, the curvature of the fixing portion 212 and the fixing lock buckle 22 can be other combinations, which is not limited to this embodiment of the present invention.

[0044] In actual use, the ink container 3 can be customized based on the required amount of ink, which may result in the size of the ink container 3 changing. In this embodiment, adjustable mounting holes 220 are designed at both ends of the fixed lock 22. The adjustable mounting holes 220 are U-shaped holes that pass through the ends of the fixed lock 22 and are used in conjunction with fasteners 23 to accommodate the installation and fixation of different models of ink containers 3. Furthermore, since the ink container 3 can be customized based on the required amount of ink, the outer diameter of the ink container 3 will also change accordingly. To improve the versatility of the ink adding device and avoid the fixing assembly 2 failing to adapt to the ink container 3 after replacing the ink container 3, which would increase the time required to replace the fixing assembly 2 and affect work efficiency, the ink container 3 can be further limited by a limiting member (not shown) on the side of the supporting portion 211. Specifically, the limiting member can be a pin or a limiting screw, which passes through the side wall of the bearing portion 211 and abuts against the outer wall of the ink storage container 3 located in the bearing portion 211, thereby limiting the movement of the ink storage container 3 in the XY plane and limiting the freedom of the ink storage container 3 to rotate around its own axis. Then, by cooperating with the fixed lock 22, the ink storage container 3 is stably fixed in the fixed base 21. At the same time, the limiting member is adjusted to make the ink storage container 3 and the piston 4 coaxial, ensuring the coaxial rotation of the ink storage container 3 and the piston 4, thereby avoiding deviation in the amount of ink added due to positional offset between the piston 4 and the ink storage container 3, thereby affecting the printing effect. Accordingly, if Figure 1 As shown, the circumference of the support portion 211 includes limiting holes 214. These limiting holes 214 are configured to correspond to limiting members. The limiting members pass through the limiting holes 214 and abut against the sidewall of the ink container 3 within the support portion 211 to limit the position of the ink container 3. In this embodiment, the circumference of the support portion 211 includes four limiting holes 214, which are evenly distributed around the circumference of the support portion 211. A limiting member is disposed within each limiting hole 214. The four limiting members cooperate to limit the position of the ink container 3. In another embodiment, the circumference of the support portion 211 includes three limiting holes 214, which are evenly distributed around the circumference of the support portion 211. A limiting member is disposed within each limiting hole 214. The three limiting members cooperate to limit the position of the ink container 3. In other embodiments, the number of the limiting holes 214 may be three or more, and the number and positions of the limiting holes 214 on the bearing portion 211 may be designed according to actual needs, which is not limited in this embodiment.

[0045] In one example, the limiting hole 214 is set as a threaded hole, and the limiting member is a limiting screw with an external thread. The limiting screw is screwed into the limiting hole 214, and the end of the limiting screw is located on the inner side of the bearing part 211. The radial position of the end of the limiting screw is adjusted by rotating multiple limiting screws, thereby realizing the positioning of ink storage containers 3 of different diameters.

[0046] In a specific embodiment, Figure 3 As shown, the propulsion assembly 5 includes a motor 51 and a screw 52 connected to the output end of the motor 51. The screw 52 extends along a first direction, and the motor 51 can reciprocate along the axial direction of the screw 52. The motor 51 is connected to the piston 4 through a connecting piece, and can drive the piston 4 to move along the first direction, applying a thrust to the ink in the inner cavity so that the ink flows out from the ink outlet 30 to supply ink to the screen printing machine. It can be understood that the first direction is the Z-axis direction shown in the figure. In this embodiment, the motor 51 is a stepping motor, which is used in conjunction with the screw 52 to form a through-type screw motor. When the motor 51 is started, the screw 52 rotates, causing the motor 51 to move along the axial direction of the screw 52, ​​and can push the piston 4 to add ink. In another embodiment, the propulsion assembly 5 can be a screw guide slide, a cylinder, or a linear motor arranged along the first direction; or the propulsion assembly 5 includes a slider placed on a screw rod, which is driven by a drive motor so that the slider can be raised and lowered along the axial direction of the screw rod, which can also achieve the technical effect of driving the piston 4 to move.

[0047] In this embodiment, the propulsion assembly 5 is mounted on the frame 1 via a guide rail assembly. The guide rail assembly includes a guide rail 71 extending along a first direction. The guide rail 71 is fixed to the frame 1, and the motor 51 is mounted on the guide rail 71 via a slider 72. The guide rail assembly guides the movement of the motor 51, thereby reducing friction and achieving smooth movement of the motor 51.

[0048] In this embodiment, the connecting member includes a connecting seat 81 fixedly coupled to the motor 51 and a connecting column 82 fixedly coupled to the piston 4 at one end away from the ink storage container 3. The connecting column 82 and the connecting seat 81 are rotatably connected, so that the piston 4 can move in a first direction driven by the motor 51, exerting a thrust on the ink in the inner cavity so that the ink flows out from the ink outlet 30 to supply ink to the screen printing machine. At the same time, the piston 4 can also rotate with the rotation of the ink storage container 3 to ensure the sealing of the inner cavity of the ink storage container 3. Specifically, the connecting seat 81 includes a mounting hole corresponding to the connecting column 82, and the connecting column 82 is installed in the mounting hole to achieve a rotational connection with the connecting seat 81, so that the piston 4 can rotate with the rotation of the ink storage container 3. It should be noted that the connecting column 82, the piston 4, the ink storage container 3 and the fixed base 21 are coaxially arranged, which can ensure the coaxial rotation of the fixed component 2, the ink storage container 3 and the piston 4. Further, as Figure 2As shown, the bottom of the connecting column 82 includes a slot 80, and the end of the piston 4 is inserted into the slot 80 to realize the connection between the piston 4 and the connecting column 82. When the ink storage container 3 needs to be replaced, it is only necessary to loosen the fastener 23 and separate the fixing lock 22 from the fixing base 21 so that the ink storage container 3 can be separated from the fixing component 2, and then start the motor 51 to reverse the motor 51 back to the initial position, while driving the piston 4 and the ink storage container 3 to move upward, and then move the end of the piston 4 out of the slot 80, remove the piston 4 and the ink storage container 3 together, and then replace the ink storage container 3, clean the piston 4, and then connect the piston 4 to the new ink storage container 3 and then install and fix it; the piston 4 and the ink storage container 3 can also be replaced at the same time to ensure that the ink in the ink storage container 3 is not contaminated, and at the same time it can save cleaning time and improve work efficiency.

[0049] In a specific embodiment, Figure 3 as well as Figure 4 As shown, the stirring assembly 6 includes a drive member and a timing belt 61. The fixed assembly 2 is connected to the output end of the drive member via the timing belt 61, and is driven by the drive member to rotate along the first axial direction with the ink reservoir 3. Specifically, the drive member includes a rotation motor 62 and a pulley 63 coupled to the output end of the rotation motor 62. The timing belt 61 connects the pulley 63 to the support portion 211 of the fixed base 21, allowing the fixed base 21 to rotate with the pulley 63, thereby driving the ink reservoir 3 fixed to the fixed base 21 to rotate. This ensures that the ink in the ink reservoir 3 is evenly mixed during the rotation of the ink reservoir 3, preventing stratification of the ink in the ink reservoir 3 that could affect printing quality. In this embodiment, the stirring assembly 6 rotates continuously to provide continuous stirring of the ink in the ink reservoir 3. In other embodiments, the stirring assembly 6 can also be configured to provide intermittent stirring, stirring the ink in the ink reservoir 3 at set time intervals to prevent stratification.

[0050] Another embodiment of the present invention provides a screen printing machine comprising a controller, a scraper device having an ink return blade, and the ink adding device of the above embodiment. The scraper device and ink adding device are connected to the controller; the ink return blade and ink adding device are positioned above the stage, and the ink outlet 30 of the ink adding device is located at the end position of the ink return blade's ink return.

[0051] In this embodiment, the controller sends a control signal to the ink adding device at a preset time interval. The ink adding device sprays ink at a regular and quantitative time according to the control signal, replacing the manual operation of adding ink. The ink addition is automatically controlled at a regular and quantitative time, which not only reduces human intervention, improves the efficiency of related operations, but also ensures printing quality.

[0052] In this embodiment, the ink container 3 is provided with a liquid level sensor (not shown) for sensing the liquid level of the ink stored in the ink container 3. This liquid level sensor (not shown) can be a buoyancy ball switch. When the liquid level of the ink stored in the ink container 3 falls below a preset threshold, it sends a warning signal to the controller, which then issues an alarm to remind the operator to replace the ink container 3. This embodiment merely provides one embodiment of a liquid level sensor as an example and is not intended to limit the liquid level sensor to a buoyancy ball switch.

[0053] During printing, the controller controls the ink-adding device to add a predetermined amount of ink to one end of the screen printing plate. The squeegee applies pressure to the inked portion of the screen while moving toward the other end. During this movement, the squeegee squeezes the ink through the mesh of the image and text area onto the substrate. The viscosity of the ink keeps the imprint within a certain range. The ink is then smoothed by the ink return blade, achieving uniform printing.

[0054] In one specific embodiment, the screen printing machine includes two ink adding devices. These two ink adding devices are mounted side by side on a mounting bracket 9, located above the worktable. The mounting bracket 9 is arranged horizontally and includes multiple mounting positions, allowing for adjustable positioning of the ink adding devices on the mounting bracket 9. It is also possible to mount more than two ink adding devices simultaneously. In another embodiment, the mounting bracket 9 may include a linear module, with the ink adding devices mounted on the linear module, allowing for flexible adjustment to meet varying printing requirements.

[0055] In this embodiment, the two ink adding devices can operate alternately without interfering with each other. When one ink adding device runs out of ink and needs to be replaced, the other continues to operate, allowing the machine to maintain operation and ensuring production efficiency. In another embodiment, the two ink adding devices can also operate simultaneously, ensuring more uniform ink addition and ensuring printing quality.

[0056] The ink adding device and screen printing machine provided in the embodiments of the present invention design the ink storage container as a replaceable syringe-type container, realize automatic addition of ink through a propulsion component, and realize timed and quantitative addition of ink through control of a controller. Compared with manual operation, the ink adding device can control the amount of ink used in a timed and quantitative manner, making ink addition more accurate, reducing human intervention, improving the efficiency of related operations, and ensuring printing quality; by designing the traditional ink storage container as a replaceable syringe-type ink storage container, the traditional method of adding ink to the ink storage container is changed to directly replacing the ink storage container, which can save time for cleaning the ink storage container and changing and loading ink, prevent ink mixing and ink deterioration problems, and ensure printing quality; in addition, a stirring component is added, which drives the fixed component to rotate the ink storage container 3 through the stirring component. The rotation of the ink storage container 3 makes the ink in the inner cavity of the ink storage container 3 evenly mixed, and the stirring action can be continuously performed, thereby improving the problem of stratification of different components due to long-term storage of ink, and ensuring printing quality; the screen printing machine is provided with two ink adding devices, and the two ink adding devices work alternately without interfering with each other. When one of the ink adding devices is out of material and needs to be replaced, the other ink adding device continues to work and the machine keeps running, thus ensuring production efficiency.

[0057] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. An ink adding device, characterized in that, include: frame; A fixing component is arranged on the frame; an ink storage container, detachably mounted on the fixing assembly, wherein the inner cavity of the ink storage container is used to store ink, and the ink storage container is provided with an ink outlet communicating with the inner cavity; a piston for sealing the inner cavity of the ink storage container and moving along the inner circumference of the inner cavity to allow ink to flow out from the ink outlet; a propulsion assembly, connected to the piston, and configured to drive the piston to move; as well as a stirring assembly connected to the fixing assembly, so that the fixing assembly drives the ink storage container to rotate relative to the frame around a first axial direction; The propulsion assembly includes a motor and a screw connected to an output end of the motor, the screw extending along a first direction, and the motor capable of reciprocating along an axis of the screw; The motor is connected to the piston via a connecting member, and can drive the piston to move in a first direction, so that the ink flows out from the ink outlet; The connecting member includes a connecting seat fixedly coupled to the motor and a connecting column fixedly coupled to an end of the piston away from the ink storage container; The connecting post is rotatably connected to the connecting seat, so that the piston can move in a first direction driven by the motor, so that the ink flows out from the ink outlet; The stirring assembly includes a driving member and a synchronous belt, and the fixed assembly is connected to the output end of the driving member through the synchronous belt and can rotate along the first axial direction together with the ink storage container under the drive of the driving member; The bottom of the connecting column includes a slot, and the end of the piston is inserted into the slot to achieve the connection between the piston and the connecting column.

2. The ink adding device according to claim 1, characterized in that: The fixing assembly includes a fixing base and a fixing lock; The fixed base is rotatably connected to the frame and is used to carry the ink storage container; The fixing lock buckle is in an arc shape corresponding to the curvature of the outer wall of the ink storage container, and is detachably connected to the fixing base to fix the ink storage container on the fixing base.

3. The ink adding device according to claim 2, characterized in that: The fixed base includes a bearing portion for bearing the ink storage container and a fixing portion formed by extending upward from the bearing portion; The fixing portion is an arc-shaped plate corresponding to the curvature of the outer wall of the ink storage container. The fixing lock is detachably arranged on the fixing portion. The fixing lock and the fixing portion form a circular ring corresponding to the shape of the outer wall of the ink storage container.

4. The ink adding device according to claim 1, characterized in that: The propulsion assembly is arranged on the frame through a guide rail assembly. The guide rail assembly includes a guide rail extending along a first direction. The guide rail is fixed on the frame. The motor is configured on the guide rail through a slider.

5. A screen printing machine, characterized in that: It comprises a controller, a scraper device with an ink return knife, and an ink adding device according to any one of claims 1 to 4, wherein the scraper device and the ink adding device are connected to the controller; the ink return knife and the ink adding device are located above the stage, and the ink outlet of the ink adding device is located at the end position of the ink return knife for returning ink.

6. The screen printing machine according to claim 5, characterized in that: The controller sends a control signal to the ink adding device at a preset time interval, and the ink adding device sprays ink according to the control signal.

7. The screen printing machine according to claim 5, characterized in that: The screen printing machine includes two ink adding devices, and the two ink adding devices are arranged side by side.

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