A printing device of an arc-shaped screen printing machine and the screen printing machine

Abstract

This invention relates to printing presses, and provides a printing apparatus and printing press for an arc-shaped screen printing machine. The apparatus includes a base plate, a substrate plate attached to the base plate, a printing plate attached to the substrate plate, side plates on both sides of the printing plate surface, a squeegee attached to the printing plate, and a pair of driving devices on both sides of the printing plate. Each driving device includes an elongated sliding hole in one of the side plates, a connecting rod connected to the end of the squeegee and passing through the sliding hole, a pair of parallel and equidistant grooves on the side of the side plates away from the squeegee, a sliding rod slidably disposed in the groove, a connecting plate connecting the pair of sliding rods, and a power component for driving the connecting plate to move along the surface of the printing plate. The connecting rod is fixedly connected to the connecting plate, and the shape of the groove is the same as the shape of the sliding hole, and the shape of the sliding hole is the same as the shape of the printing plate. The printing apparatus and printing press for the arc-shaped screen printing machine of this invention can efficiently screen print on curved surfaces, improving print quality.

Description

Technical Field

[0001] This invention relates to the technical field of printing presses, and more specifically, to a printing apparatus and a printing press for an arc screen printing machine. Background Technology

[0002] Screen printing is a method of creating graphics by using a perforated screen and printing ink, and then applying the ink through a squeegee. While screen printing produces graphics with lower precision than photolithography, it is simpler, more efficient, and cheaper, making it suitable for mass production.

[0003] Besides its widespread application in flat printing, screen printing can also be used for printing on relatively regular curved surfaces, primarily referring to the surface printing of bottles. While the outer wall of a bottle is a relatively regular curved surface, making the printing process relatively simple, screen printing is difficult to apply to spherical surfaces and surfaces with gradually changing curvature. Although screen printing can be used for wavy surfaces, the printing quality is difficult to guarantee. This is mainly because, during the screen printing process, it is difficult to maintain a consistent angle and force between the squeegee and the printing plate as the squeegee moves across them. Automating this process is costly, and manual methods also struggle to guarantee print quality. Therefore, a screen printing method applicable to curved products could be designed. Summary of the Invention

[0004] The purpose of this invention is to provide a printing device and a printing machine for an arc screen printing machine, which can efficiently screen print on arc-shaped products and improve printing quality.

[0005] The embodiments of the present invention are achieved through the following technical solutions: The printing device of the arc screen printing machine of the present invention includes a base plate, a substrate plate attached to the base plate, a printing plate attached to the substrate plate, a surrounding plate disposed on both sides of the surface of the printing plate, a scraper attached to the printing plate, and a pair of driving devices disposed on both sides of the printing plate; the driving device includes an elongated sliding hole opened in the surrounding plate, a connecting rod connected to the end of the scraper and disposed through the sliding hole, a pair of parallel and equidistant sliding grooves opened on the side of the surrounding plate away from the scraper, a sliding rod slidably disposed in the sliding groove, a connecting plate for connecting the pair of sliding rods, and a power component for driving the connecting plate to move along the surface of the printing plate; the connecting rod is fixedly connected to the connecting plate, the shape of the sliding groove is the same as the shape of the sliding hole, and the shape of the sliding hole is the same as the shape of the printing plate.

[0006] Furthermore, the power assembly includes a drive block hinged to the connecting plate, a first slider connected to the drive block, a first lead screw threaded to the first slider, a first motor for driving the first lead screw to rotate, a second slider connected to the first motor, a second lead screw threaded to the second slider, a pair of fixing blocks respectively connected to the ends of the second lead screw, and a second motor for driving the second lead screw to rotate; the first lead screw is vertically arranged, and the second lead screw is horizontally arranged below the first lead screw.

[0007] Furthermore, the first slider is slidably connected to a first limiting rod, which is connected to the second slider; the first limiting rod is parallel to the first lead screw.

[0008] Furthermore, the second slider is slidably connected to a second limiting rod, the two ends of which are respectively connected to a pair of the fixed blocks, and the second limiting rod is parallel to the second lead screw.

[0009] Furthermore, the connecting plate has a sleeve on the side away from the enclosure, the sleeve has a threaded hole on its side wall, a fastening bolt is threaded into the threaded hole, the connecting rod passes through the sleeve, and the fastening bolt abuts against the connecting rod; the upper end of the driving block is rotatably connected to the sleeve.

[0010] Furthermore, it also includes a rotating mechanism for driving the sleeve to rotate.

[0011] Furthermore, the rotating mechanism includes a connector connected to the sleeve, and a third motor for driving the connector to rotate, the third motor being disposed on the connecting plate.

[0012] Furthermore, the connector is detachably connected to the sleeve.

[0013] Furthermore, it also includes a bracket for supporting the base plate, and a lifting device for driving the bracket to rise and fall.

[0014] The present invention also provides a printing press based on the printing apparatus of the above-described arc screen printing machine.

[0015] The technical solution of the present invention has at least the following advantages and beneficial effects: In the use of the arc screen printing machine of the present invention, the product to be printed (substrate) is placed on the base plate, the printing plate is pressed onto the substrate, the squeegee is pressed against the printing plate, and ink is placed on the printing plate to begin printing. During the printing process, the connecting plate is driven by the driving device to move along the same path as the printing plate, so that the squeegee can move stably along the surface of the printing plate under the drive of the connecting rod throughout the movement. Furthermore, because the sliding rods at both ends of the connecting plate slide in the groove, and the shape of the groove matches the shape of the sliding hole, the line connecting a pair of sliding rods will always be perpendicular to its direction of movement due to the restriction of the connecting plate and the groove. This ensures that the angle between the squeegee and the printing plate remains consistent throughout the movement, resulting in a consistent printing effect on all parts of the substrate. This not only ensures good printing quality but also improves the consistency of the printing effect on the substrate. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the printing apparatus of the arc screen printing machine provided in an embodiment of the present invention from one perspective;

[0018] Figure 2 A two-view structural schematic diagram of the printing apparatus of the arc screen printing machine provided in an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the unfolded structure of the printed circuit board provided in an embodiment of the present invention;

[0020] Figure 4 For along Figure 2 Partial sectional view along the AA direction;

[0021] Figure 5 This is a schematic diagram of the rotating mechanism provided in an embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the connecting plate portion provided in an embodiment of the present invention;

[0023] Figure 7 for Figure 1 Enlarged view of section B.

[0024] Icons: 11-Base plate, 12-Printing plate, 13-Printing plate, 14-Side plate, 15-Sliding hole, 16-Sliding groove, 17-Bracket, 21-Scraper, 22-Connecting rod, 23-Connecting plate, 24-Sliding rod, 25-Sleeve, 26-Threaded hole, 27-Connector, 28-Third motor, 31-Drive block, 32-First slider, 33-First lead screw, 34-First limit rod, 35-Second slider, 36-Second lead screw, 37-Second limit rod, 38-Fixing block. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of this invention, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0029] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] Example

[0031] The following description, in conjunction with specific embodiments, further illustrates the point, as shown in the appendix. Figure 1 - Appendix Figure 7 As shown, the printing apparatus of the arc screen printing machine in this embodiment includes a base plate 11, a substrate plate 12 attached to the base plate 11, a printing plate 13 attached to the substrate plate 12, a surrounding plate 14 disposed on both sides of the surface of the printing plate 13, a scraper 21 attached to the printing plate 13, and a pair of driving devices disposed on both sides of the printing plate 13. The driving device includes an elongated sliding hole 15 opened in the surrounding plate 14, a connecting rod 22 connected to the end of the scraper 21 and disposed through the sliding hole 15, a pair of parallel and equidistant sliding grooves 16 opened on the side of the surrounding plate 14 away from the scraper 21, a sliding rod 24 slidably disposed in the sliding groove 16, a connecting plate 23 for connecting the pair of sliding rods 24, and a power component for driving the connecting plate 23 to move along the surface of the printing plate 13. The connecting rod 22 is fixedly connected to the connecting plate 23, the shape of the sliding groove 16 is the same as the shape of the sliding hole 15, and the shape of the sliding hole 15 is the same as the shape of the printing plate 13. Specifically, during use, the product to be printed (printing plate 12) is placed on the base plate 11, the printing plate 13 is pressed onto the printing plate 12, the squeegee 21 is placed against the printing plate 13, and ink is applied to the printing plate 13 to begin printing. During the printing process, the connecting plate 23 is driven by the driving device to move along the same path as the printing plate 13. This allows the squeegee 21 to move stably along the surface of the printing plate 13 under the drive of the connecting rod 22. Furthermore, since the sliding rods 24 at both ends of the connecting plate 23 slide in the groove 16, and the shape of the groove 16 is consistent with the shape of the sliding hole 15, the line connecting the pair of sliding rods 24 will always be perpendicular to its direction of movement due to the restriction of the connecting plate 23 and the groove 16. This ensures that the angle between the squeegee 21 and the printing plate 13 remains consistent throughout the entire movement, resulting in a consistent printing effect on all parts of the printing plate 12. This not only ensures good printing quality but also improves the consistency of the printing effect on the printing plate 12. The bending of the base plate 11, the printing plate 12, and the printing plate 13 must be consistent. That is, for a given printing plate 12, a matching base plate 11 and printing plate 13 must be designed.

[0032] The power assembly in this embodiment includes a drive block 31 hinged to the connecting plate 23, a first slider 32 connected to the drive block 31, a first lead screw 33 threadedly connected to the first slider 32, a first motor for driving the first lead screw 33 to rotate, a second slider 35 connected to the first motor, a second lead screw 36 threadedly connected to the second slider 35, a pair of fixing blocks 38 respectively connected to the ends of the second lead screw 36, and a second motor for driving the second lead screw 36 to rotate. The first lead screw 33 is vertically arranged, and the second lead screw 36 is horizontally arranged below the first lead screw 33. Specifically, the first motor drives the first lead screw 33 to rotate, thereby driving the first slider 32 to move up and down, along with the drive block 31, the connecting rod 22, and the scraper 21. The second motor drives the second lead screw 36 to rotate, thereby driving the second slider 35 to move the first slider 32 in the horizontal direction. Through the synchronous movement in the horizontal and vertical directions, the scraper 21 can be driven to move along a predetermined route (i.e., the curvature of the surface of the printing plate 13). The combination of the first lead screw 33 and the first slider 32, and the combination of the second lead screw 36 and the second slider 35, constitute the driving method of the ball screw. In addition, hydraulic rods, starter rods, electric push rods, gear and rack combinations, and other driving mechanisms can also be used.

[0033] In this embodiment, the first slider 32 is slidably connected to a first limiting rod 34, which is connected to the second slider 35; the first limiting rod 34 is parallel to the first lead screw 33. The second slider 35 is slidably connected to a second limiting rod 37, whose two ends are respectively connected to a pair of fixing blocks 38, and the second limiting rod 37 is parallel to the second lead screw 36. Specifically, by setting the first limiting rod 34 and the second limiting rod 37, the operation of the first slider 32 and the second slider 35 can be made more stable.

[0034] In this embodiment, the connecting plate 23 is provided with a sleeve 25 on the side away from the surrounding plate 14. A threaded hole 26 is opened on the side wall of the sleeve 25, and a fastening bolt is threaded into the threaded hole 26. The connecting rod 22 is installed through the sleeve 25, and the fastening bolt abuts against the connecting rod 22. The upper end of the driving block 31 is rotatably connected to the sleeve 25. Specifically, this facilitates the adjustment of the tilt angle of the scraper 21. Since the position of the sliding hole 15 is fixed, the gap between the scraper 21 and the printing plate 13 will change when the angle of the scraper 21 is rotated. Therefore, if the adjusted angle is large, it is usually necessary to replace the corresponding scraper 21.

[0035] In this embodiment, a rotating mechanism for driving the sleeve 25 to rotate is also included. The rotating mechanism includes a connector 27 connected to the sleeve 25 and a third motor 28 for driving the connector 27 to rotate. The third motor 28 is mounted on the connecting plate 23. The connector 27 is detachably connected to the sleeve 25. Specifically, since the angle of the connecting plate 23 changes in real time according to the curvature of the printed circuit board 13 during movement, and this change is caused by a pair of sliding rods 24, and there is a certain friction between the sliding rods 24 and the groove 16, although this friction can be reduced by lubricating fluid, its movement may still be subject to certain resistance in places with large curvature. Therefore, by setting a third motor 28, the angle of the connecting plate 23 is assisted in rotating during movement, so that the sliding rods 24 on the connecting plate 23 are always at the optimal moving angle. It is only necessary to make the third motor 28 (which can be a servo motor or a synchronous motor with high precision) rotate according to the preset angle and direction, which can effectively improve the smoothness of the scraper 21 movement.

[0036] In this embodiment, a bracket 17 for supporting the base plate 11 and a lifting device for driving the bracket 17 to rise and fall are also included. Specifically, the lifting device is mainly used to lift the base plate 11 so that the base plate 11 and the printing plate 13 stably clamp the printing plate 12 between them. It can be powered by hydraulic drive, electric push rod or pneumatic push rod.

[0037] In summary, the printing apparatus of the arc screen printing machine of this embodiment, when in use, places the product to be printed (printing plate 12) on the base plate 11, presses the printing plate 13 onto the printing plate 12, places the squeegee 21 against the printing plate 13, and applies ink to the printing plate 13 to begin printing. During the printing process, the connecting plate 23 is driven by the driving device to move along the same path as the printing plate 13, so that the squeegee 21 can stably move along the surface of the printing plate 13 under the drive of the connecting rod 22 throughout the movement. Furthermore, due to the connecting plate... The sliding rods 24 at both ends of 23 slide in the groove 16, and the shape of the groove 16 is consistent with the shape of the sliding hole 15. During the movement of the sliding rods 24, due to the restriction of the connecting plate 23 and the groove 16, the line connecting a pair of sliding rods 24 will always be perpendicular to its direction of movement. This ensures that the angle between the scraper 21 and the printing plate 13 remains consistent throughout the entire movement process, so that all parts of the printing plate 12 have a consistent printing effect. This not only ensures the printing quality well, but also improves the consistency of the printing effect on the printing plate 12.

[0038] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A printing apparatus for an arc-shaped screen printing machine, characterized in that: It includes a base plate (11), a printing plate (12) attached to the base plate (11), a printing plate (13) attached to the printing plate (12), side panels (14) on both sides of the surface of the printing plate (13), a scraper (21) attached to the printing plate (13), and a pair of driving devices on both sides of the printing plate (13). The driving device includes an elongated sliding hole (15) opened in the enclosure (14), a connecting rod (22) connected to the end of the scraper (21) and passing through the sliding hole (15), a pair of parallel and equidistant sliding grooves (16) opened on the side of the enclosure (14) away from the scraper (21), a sliding rod (24) slidably disposed in the sliding groove (16), a connecting plate (23) for connecting the pair of sliding rods (24), and a power component for driving the connecting plate (23) to move along the surface of the printing plate (13); The connecting rod (22) is fixedly connected to the connecting plate (23), the shape of the sliding groove (16) is the same as the shape of the sliding hole (15), and the shape of the sliding hole (15) is the same as the shape of the printing plate (13); The power assembly includes a drive block (31) hinged to the connecting plate (23), a first slider (32) connected to the drive block (31), a first lead screw (33) threadedly connected to the first slider (32), a first motor for driving the first lead screw (33) to rotate, a second slider (35) connected to the first motor, a second lead screw (36) threadedly connected to the second slider (35), a pair of fixing blocks (38) respectively connected to the ends of the second lead screw (36), and a second motor for driving the second lead screw (36) to rotate; the first The lead screw (33) is vertically arranged, and the second lead screw (36) is horizontally arranged below the first lead screw (33); the connecting plate (23) is provided with a sleeve (25) on the side away from the surrounding plate (14), and the side wall of the sleeve (25) is provided with a threaded hole (26), and a fastening bolt is threaded in the threaded hole (26). The connecting rod (22) is arranged through the sleeve (25), and the fastening bolt abuts against the connecting rod (22); the upper end of the driving block (31) is rotatably connected to the sleeve (25); it also includes a rotating mechanism for driving the sleeve (25) to rotate.

2. The printing apparatus of the arc screen printing machine according to claim 1, characterized in that: The first slider (32) is slidably connected to a first limiting rod (34), and the first limiting rod (34) is connected to the second slider (35); the first limiting rod (34) is parallel to the first lead screw (33).

3. The printing apparatus of the arc-shaped screen printing machine according to claim 1, characterized in that: The second slider (35) is slidably connected to a second limiting rod (37), and the two ends of the second limiting rod (37) are respectively connected to a pair of fixed blocks (38). The second limiting rod (37) is parallel to the second lead screw (36).

4. The printing apparatus of the arc-shaped screen printing machine according to claim 1, characterized in that: The rotating mechanism includes a connector (27) connected to the sleeve (25) and a third motor (28) for driving the connector (27) to rotate, the third motor (28) being mounted on the connecting plate (23).

5. The printing apparatus of the arc-shaped screen printing machine according to claim 4, characterized in that: The connector (27) is detachably connected to the sleeve (25).

6. The printing apparatus of the arc screen printing machine according to claim 1, characterized in that: It also includes a bracket (17) for supporting the base plate (11) and a lifting device for driving the bracket (17) to rise and fall.

7. A printing machine based on the printing apparatus of the arc screen printing machine according to any one of claims 1-6.

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