A curved surface screen printing device

Abstract

This application provides a curved surface screen printing apparatus, comprising: a worktable; a lifter disposed opposite to the worktable; a contour screen fixedly connected to the lifter, the contour screen being located above the worktable; and a squeegee device disposed on the top of the contour screen, wherein the squeegee device comprises: a squeegee fixing device disposed on the top of the contour screen; a squeegee moving track fixed on the squeegee fixing device; a squeegee rotating device disposed on the squeegee moving track; and a squeegee fixed on the squeegee rotating device. The solution of this invention can achieve printing on concave and convex surfaces without encountering intractable defects such as uneven ink thickness, screen sticking, and ink leakage.

Description

Technical Field

[0001] This application relates to the field of curved surface screen printing apparatus technology, and more particularly to a curved surface screen printing apparatus. Background Technology

[0002] Traditional ink screen printing utilizes a flat surface. Typically, in a flat surface screen printing machine, the squeegee moves in a linear motion, and the screen is also flat. During printing, the squeegee applies pressure to the glass, squeezing the ink evenly to achieve uniform ink thickness and color. However, when screen printing on large-curvature automotive glass, the squeegee cannot achieve uniform pressure due to the glass's curvature, resulting in uneven ink thickness, and even problems such as missing teeth, jagged edges, and discoloration.

[0003] Other patents, such as "A 3D screen printing stencil with double or multiple curvatures for printing on concave surfaces" (patent number CN217863260U), are only applicable to convex surface printing and cannot meet the requirements of concave surface printing. Alternatively, methods involve placing the product on a flat fixture, applying pressure to adhere it to the fixture, and then using vacuum suction to hold it in place, to accommodate printing on different curved surfaces. However, these methods easily cause scratches and other appearance defects on the product. Furthermore, due to the pressure, angle, and uniform gap requirements between the screen and the glass substrate, as well as the product's rebound process, the uniform ink thickness of the screen printing becomes stretched, easily leading to uneven ink thickness, screen sticking, ink leakage, and other difficult-to-solve defects. This presents significant limitations for the curved surface printing industry.

[0004] Therefore, how to design a curved screen printing device that can achieve printing on concave and convex surfaces without causing intractable defects such as uneven ink thickness, screen sticking, and ink leakage is a problem that urgently needs to be solved by those in the field. Summary of the Invention

[0005] One of the technical problems this application aims to solve is that existing curved surface screen printing devices cannot achieve printing on concave and convex surfaces.

[0006] To address the aforementioned technical problems, embodiments of this application provide a curved surface screen printing apparatus, comprising:

[0007] Workbench;

[0008] A lift is disposed opposite to the worktable;

[0009] A contoured mesh plate fixedly connected to the lifting device, the contoured mesh plate being located above the worktable; and

[0010] A glue-scraping device is disposed on the top of the conformal mesh plate, wherein the glue-scraping device includes:

[0011] A glue-fixing device is installed on the top of the contour mesh plate;

[0012] The glue scraping moving track is fixed on the glue scraping fixing device;

[0013] A scraper rotating device is installed on the scraper moving track; and

[0014] The glue scraper is fixed on the glue scraper rotating device.

[0015] In some embodiments, the workbench includes:

[0016] Workbench base;

[0017] A worktable rotation device is installed on the top of the worktable base;

[0018] A worktable fixing device disposed on the worktable rotating device; and

[0019] The worktable platform is located on top of the worktable rotation device.

[0020] In some embodiments, the length of the contoured mesh plate is greater than the length of the workbench platform.

[0021] In some embodiments, the workbench platform has a rectangular structure.

[0022] In some embodiments, the lift includes:

[0023] Lifter base;

[0024] A lifting device is installed on top of the lifting base; and

[0025] The lifting device is installed on top of the lifting device.

[0026] In some embodiments, the lifting device includes:

[0027] A lifting rotating device is installed at the top of the lifting device; and

[0028] The lifting device rotation fixing device is installed on the lifting device rotation mechanism.

[0029] In some embodiments, both the lifting device and the worktable rotating device are semi-circular structures.

[0030] In some embodiments, the contouring mesh is a curved contouring mesh.

[0031] In some embodiments, the adhesive scraping track includes a vertical guide rail and a horizontal guide rail.

[0032] In some embodiments, the top of the contour stencil is a screen printing surface, wherein the screen printing surface includes:

[0033] Plane, curved, concave and convex surfaces.

[0034] The curved surface screen printing apparatus provided by this application, through the above technical solution, includes: a worktable; a lifter disposed opposite to the worktable; a contour screen fixedly connected to the lifter, the contour screen being located above the worktable; and a squeegee device disposed on the top of the contour screen, wherein the squeegee device includes: a squeegee fixing device disposed on the top of the contour screen; a squeegee moving track fixed on the squeegee fixing device; a squeegee rotating device disposed on the squeegee moving track; and a squeegee fixed on the squeegee rotating device. The solution of this invention can achieve printing on concave and convex surfaces without encountering intractable defects such as uneven ink thickness, screen sticking, and ink leakage. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the curved surface screen printing device disclosed in the embodiments of this application;

[0037] Figure 2 This is a 3D curved surface product schematic diagram of the curved surface screen printing device disclosed in the embodiments of this application;

[0038] Figure 3 This is a schematic diagram showing the position between the first and second bends of the curved screen printing device disclosed in the embodiments of this application;

[0039] Figure 4 This is a schematic diagram of the third bending position of the curved screen printing device disclosed in the embodiments of this application.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1. Workbench; 2. Contouring mesh plate; 3. Lifter; 4. Glue scraping device; 11. Workbench base; 12. Workbench rotation device; 13. Workbench fixing device; 14. Workbench platform; 31. Lifter base; 32. Lifting device; 33. Lifter rotation device; 34. Lifter rotation fixing device; 41. Glue scraping moving track; 42. Glue scraping rotating device; 43. Glue scraper; 44. Glue scraping fixing device. Detailed Implementation

[0042] The embodiments of this application will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application. This application can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0043] These embodiments are provided to make the application thorough and complete, and to fully express the scope of the application to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​illustrated in these embodiments should be interpreted as merely exemplary and not as limiting.

[0044] It should be noted that, in the description of this application, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationship, are only for the convenience of describing this application and simplifying the description, and do not 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 application. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0045] Furthermore, the terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well.

[0046] It should also be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" 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 direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0047] All terms used in this application have the same meaning as understood by one of ordinary skill in the art to which this application pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0048] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0049] Figure 1 A schematic diagram of the curved surface screen printing apparatus disclosed in an embodiment of this application is shown, as follows: Figure 1 As shown, the curved surface screen printing device includes:

[0050] Workbench 1;

[0051] The lift 3 is disposed opposite to the worktable 1;

[0052] The contoured mesh plate 2 is fixedly connected to the lifting device 3, and the contoured mesh plate 2 is located above the worktable 1; and

[0053] A glue-scraping device 4 is disposed on the top of the conformal mesh plate 2, wherein the glue-scraping device 4 includes:

[0054] The adhesive fixing device 44 is installed on the top of the contour mesh plate 2;

[0055] The glue scraping moving track 41 is fixed on the glue scraping fixing device 44;

[0056] The glue scraping rotating device 42 is disposed on the glue scraping moving track 41; and

[0057] The glue scraper 43 is fixed on the glue scraper rotating device 42.

[0058] In this embodiment, the curved surface screen printing apparatus provided in this application includes: a worktable; a lifter disposed opposite to the worktable; a contour screen plate fixedly connected to the lifter, the contour screen plate being located above the worktable; and a squeegee device disposed on the top of the contour screen plate, wherein the squeegee device includes: a squeegee fixing device disposed on the top of the contour screen plate; a squeegee moving track fixed on the squeegee fixing device; a squeegee rotating device disposed on the squeegee moving track; and a squeegee fixed on the squeegee rotating device. The solution of this invention can achieve printing on uneven surfaces without encountering intractable defects such as uneven ink thickness, screen sticking, or ink leakage.

[0059] Specifically, the product to be screen-printed has multiple bends. At each bend, the rotating work base moves, causing the upper part and the product to rotate around the pivot, eventually returning to a horizontal position. As the squeegee moves along the horizontal guide rail towards the other end of the product, it rotates around the upper pivot, maintaining a consistent angle with the contour jig. Once the screen printing is complete, the squeegee rises and moves horizontally along the vertical and horizontal guide rails, returning to its initial position. The contour stencil lifting mechanism then raises the contour stencil back to its initial position. Repeating this process avoids unresolved defects such as uneven ink thickness, screen sticking, and ink leakage, thus completing the screen printing process.

[0060] Figure 2-4 The following diagrams illustrate the 3D curved surface product schematic diagram of the curved surface screen printing device disclosed in this application, the position schematic diagrams between the first and second bends of the curved surface screen printing device disclosed in this application, and the position schematic diagram of the third bend of the curved surface screen printing device disclosed in this application. Figure 2-4 As shown, in some embodiments, the workbench 1 includes:

[0061] Workbench base 11;

[0062] A worktable rotation device 12 is installed on the top of the worktable base 11;

[0063] The worktable fixing device 13 is provided on the worktable rotating device 12; and

[0064] The worktable platform 14 is located on top of the worktable rotation device 12.

[0065] In this embodiment, the workbench base 11 is used to support the entire workbench. Its bottom surface usually has a friction surface to increase friction, thereby increasing the roughness and pressure of the contact surface of the object and making the whole more stable. The workbench rotation device 12 is used to tilt the workbench platform 14 so that the workbench platform 14 can be adapted to different products. The workbench fixing device 13 is used to fix the workbench rotation device 12 so that the workbench platform 14 is more stable when working. The bottom of the workbench platform 14 is fixedly connected to the workbench rotation device 12. After being rotated to a suitable position by the workbench rotation device 12, the position is fixed by the workbench fixing device 13.

[0066] In some embodiments, the length of the contoured mesh plate 2 is greater than the length of the workbench platform 14.

[0067] In this embodiment, the workbench platform 14 is shorter than the length of the contouring screen 2, which makes it easier to pick up the contouring screen 2, and makes it easier to replace the contouring screen 2 when it is damaged. It also makes it easier to pick up the products on the contouring screen 2.

[0068] In some embodiments, the workbench platform 14 has a rectangular structure.

[0069] In this embodiment, setting the workbench platform 14 as a rectangular structure has the following advantages:

[0070] First, the rectangular structure is suitable for various products and has wide adaptability;

[0071] Second, rectangular structures are usually more compact and have enough space to maximize space utilization;

[0072] Third, rectangular structures do not have too many curves and sharp corners, and the edges are usually flat, which makes them easier to maintain and clean.

[0073] Fourth, multiple workbenches can be prepared, and the rectangular structure makes them easy to organize;

[0074] Fifth, rectangular structures have strong stability.

[0075] In some embodiments, the lift 3 includes:

[0076] Lifter base 31;

[0077] The lifting device 32 is installed on the top of the lifting base 31; and

[0078] The lifting device is installed at the top of the lifting device 32.

[0079] In this embodiment, the lifting device 3 is a device that lifts and lowers a certain equipment through a certain transmission method. It can accurately control and adjust the lifting or pushing height according to a certain program. It can be driven directly by an electric motor or other power, or it can be driven manually. The screw jack is also known as a screw transmission mechanism.

[0080] A screw jack is a lifting device based on the principle of screw drive. Its basic working principle is that an electric motor drives the screw to rotate, causing the thread on the screw to interact with the nut, thereby achieving the vertical movement of the lifting platform. The following is a detailed explanation of the working principle of a screw jack:

[0081] A lead screw is a helical metal rod with numerous threads. An electric motor is mounted below the lead screw, and the motor's output shaft is connected to one end of the lead screw. A nut is a threaded part that meshes with the threads of the lead screw. The lifting platform is fixed above the nut. Through the interaction of the threads and the nut, the platform can move up and down along the direction of the lead screw. When the motor operates, its output shaft drives the lead screw to rotate. The interaction between the threads of the lead screw and the nut causes the lifting platform to move up and down along the direction of the lead screw. Since the pitch of the lead screw and nut is the same, the position of the lifting platform rises or falls by one pitch with each rotation. The screw jack controls the direction of the platform's movement by changing the rotation direction of the motor. When the motor rotates clockwise, the lifting platform moves upward; when the motor rotates counterclockwise, the lifting platform moves downward. By controlling the motor's rotation speed and direction, precise lifting, lowering, and stopping of the platform can be achieved.

[0082] In summary, the working principle of a screw jack is based on the interaction of the helical motion of the screw and nut. The lifting platform moves up and down through the drive of a motor, thereby realizing the vertical transportation of goods and personnel.

[0083] In some embodiments, the lifting device includes:

[0084] The lifting rotating device 33 is installed on the top of the lifting device 32; and

[0085] The lifting device rotation fixing device 34 is installed on the lifting device rotation device 33.

[0086] In this embodiment, when the lifting device 32 is raised to a suitable position, the contour mesh plate 2 can be rotated and adjusted by the lifting device 33, and then the contour mesh plate 2 can be fixed by the lifting device 34.

[0087] In some embodiments, both the lifting device 33 and the worktable rotating device 12 are semi-circular structures.

[0088] In this embodiment, a semicircle (Half Pearl) refers to half of a circle, obtained by dividing a circle into two equal halves. In geometry, a semicircle is a special form of a sector; a sector with a 180-degree angle is called a semicircle. A semicircle is an arc, and its structure offers the following advantages:

[0089] First, the semi-circular structure can limit the rotation range to within 180 degrees, thus having a limiting function;

[0090] Secondly, the semi-circular structure, being an arc shape, is easy to slide and is more suitable for use as a rotating device.

[0091] In some embodiments, the contouring mesh 2 is a curved contouring mesh.

[0092] In this embodiment, the contoured mesh is selected with a curved surface, which can be adapted to a wider variety of products.

[0093] In some embodiments, the adhesive scraping moving track 41 includes a vertical guide rail and a horizontal guide rail.

[0094] In this embodiment, the squeegee moving track 41 is equipped with vertical and horizontal guide rails, which can make the product more precise and the positioning more accurate during the screen printing process.

[0095] In some embodiments, the top of the contour stencil 2 is a screen printing surface, wherein the screen printing surface includes:

[0096] Plane, curved, concave and convex surfaces.

[0097] In this embodiment, screen printing refers to using a screen as a printing plate base and creating a screen printing plate with images and text through a photosensitive plate-making method. Screen printing consists of five main elements: screen printing plate, squeegee, ink, printing table, and substrate. Printing is based on the fundamental principle that ink can pass through the mesh openings of the screen printing plate in the image areas, while ink cannot pass through the mesh openings in the non-image areas. During printing, ink is poured into one end of the screen printing plate, and a squeegee applies pressure to the ink areas on the screen printing plate while moving at a constant speed towards the other end. As it moves, the ink is forced from the mesh openings of the image areas onto the substrate by the squeegee.

[0098] Reduce production costs and investment costs for flue gas treatment facilities. Reduce the workload of employees and minimize the impact on kiln operation.

[0099] The above embodiments of the present invention also provide a specific curved surface screen printing mechanism, including: a rotatable working base, a contour screen, a contour screen lifting mechanism, a squeegee moving track, a squeegee rotating device, and a squeegee. During the screen printing process, the squeegee is subjected to uniform force, resulting in uniform ink thickness and color, avoiding problems such as uneven ink thickness, missing teeth, jagged edges, and discoloration. At the same time, it realizes single-sided printing of multi-curved products with the same normal bending, including a single curvature.

[0100] This embodiment has the following characteristics:

[0101] First, a curved screen printing mechanism is provided. When multiple curved products are bent along the same normal and printed on one side, uneven force on the contact surface leads to uneven ink thickness, screen sticking, ink leakage and other screen printing defects.

[0102] Secondly, the curved screen printing mechanism has a rotatable working base with a rotating shaft installed at the bottom. With the vertical normal direction as 0°, its rotation angle is ±80°. The rotation direction is consistent with the bending direction of the curved surface. A conforming jig that matches the product shape is fixed above it. During the screen printing process, as the squeegee moves laterally, the screen printing surface and the squeegee maintain the same angle, and the force is applied evenly to obtain ink with uniform thickness and uniform color.

[0103] Third, the contouring screen perfectly matches the bending shape of the product;

[0104] Fourth, the contour screen lifting mechanism has a lifting function, which is in contact with the screen printing surface during operation and away from the screen printing surface after screen printing; the contour screen lifting mechanism has swing and rotation functions, and moves synchronously with the base during screen printing, so that the screen printing surface and the squeegee maintain the same angle, apply force evenly, and obtain ink with uniform ink thickness and uniform color.

[0105] Fifth, the adhesive scraping moving track includes a vertical guide rail and a horizontal guide rail, enabling it to move up and down vertically along the vertical and horizontal guide rails;

[0106] Sixth, the squeegee rotation device has a rotating shaft installed on top, with the vertical direction of the normal phase as 0° and its rotation angle as ±45°. The squeegee is installed below it. During the screen printing process, it changes its own angle at any time along with the base and screen to keep the screen printing surface and the squeegee at the same angle, so as to apply force evenly and obtain ink with uniform thickness and uniform color.

[0107] Seventh, the squeegee is installed below the squeegee rotating device. During the screen printing process, the squeegee moves downward until it is in close contact with the contour screen, and the ink is screen printed onto the product surface to form a pattern by squeezing.

[0108] Specifically, the above embodiments include the following implementation methods:

[0109] First, fix the conforming jig that perfectly matches the product to the rotatable working base and use a clamping device to hold it in place.

[0110] Second, the contouring mesh plate that perfectly matches the product is fixed to the contouring mesh plate lifting mechanism and fixed with a clamping device. Its position is in the rising state, away from the contouring fixture fixed to the rotatable working base.

[0111] Third, a scraper is installed below the scraper rotation device. The scraper is located above the contour screen and is used to scrape and apply ink.

[0112] Fourth, the product to be screen printed is fixed in the conforming fixture by vacuum adsorption;

[0113] Fifth, the contouring screen lifting mechanism lowers the contouring screen until it completely covers the product, at which point the product fits tightly against the contouring screen.

[0114] Sixth, the squeegee moves along the horizontal guide rail to one end of the product to be screen printed, and then descends along the vertical guide rail until the bottom of the squeegee is in close contact with the screen printing plate. The squeegee moves along the horizontal guide rail to the other end of the product to be screen printed, and the ink is screen printed onto the surface of the product to form a pattern by squeezing.

[0115] Seventh, as the squeegee moves along the horizontal guide rail toward the other end of the product to be screen printed, since the product to be screen printed has multiple bends, the rotatable working base can be rotated at the bend, causing the upper part and the product to rotate around the pivot along with the product's bending trend, and finally return to the horizontal position.

[0116] Eighth, as the squeegee moves along the horizontal guide rail toward the other end of the product to be screen printed, the squeegee rotates around the upper pivot, and the angle between the squeegee and the contour jig remains consistent.

[0117] Ninth, the squeegee moves along the horizontal guide rail to the other end of the product to be screen printed. Once the screen printing is complete, the squeegee rises and moves horizontally along the vertical and horizontal guide rails, returning to its initial position.

[0118] Tenth, the contour screen lifting mechanism drives the contour screen to rise and return to the initial position, completing the product screen printing.

[0119] In the above embodiments of the present invention, a curved surface screen printing apparatus is provided, comprising: a worktable; a lifter disposed opposite to the worktable; a contour screen fixedly connected to the lifter, the contour screen being located above the worktable; and a squeegee device disposed on the top of the contour screen, wherein the squeegee device comprises: a squeegee fixing device disposed on the top of the contour screen; a squeegee moving track fixed on the squeegee fixing device; a squeegee rotating device disposed on the squeegee moving track; and a squeegee fixed on the squeegee rotating device. The solution of the present invention can achieve printing on concave and convex surfaces without encountering intractable defects such as uneven ink thickness, screen sticking, and ink leakage.

[0120] The embodiments of this application have now been described in detail. To avoid obscuring the concept of this application, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0121] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any manner.

Claims

1. A curved surface screen printing device, characterized in that, include: Workbench (1); The workbench (1) includes: Workbench base (11); The workbench rotation device (12) is installed on the top of the workbench base (11); A lift (3) is disposed opposite to the worktable (1); The elevator (3) includes: Lifter base (31); A lifting device (32) is installed on top of the lifting base (31); and A lifting device connecting device is installed on the top of the lifting device (32); The lifting device includes: A lifting rotating device (33) is installed on top of the lifting device (32); and The lifting device rotation fixing device (34) is installed on the lifting device rotation device (33); Both the lifting device (33) and the worktable rotating device (12) are semi-circular structures; A contoured mesh plate (2) is fixedly connected to the lifting device (3), and the contoured mesh plate (2) is located above the workbench (1); and A glue scraping device (4) is disposed on the top of the contour mesh plate (2), wherein the glue scraping device (4) includes: A glue-fixing device (44) is installed on the top of the contour mesh plate (2). The glue scraping moving track (41) is fixed on the glue scraping fixing device (44); The scraper rotation device (42) is installed on the scraper moving track (41); and The glue scraper (43) is fixed on the glue scraper rotating device (42).

2. The curved surface screen printing device according to claim 1, characterized in that, The workbench (1) also includes: A worktable fixing device (13) is provided on the worktable rotating device (12); and The workbench platform (14) is located on top of the workbench rotation device (12).

3. The curved surface screen printing device according to claim 2, characterized in that, The length of the contour mesh plate (2) is greater than the length of the workbench platform (14).

4. The curved surface screen printing device according to claim 2, characterized in that, The workbench platform (14) has a rectangular structure.

5. The curved surface screen printing device according to claim 1, characterized in that, The contouring mesh (2) is a curved contouring mesh.

6. The curved surface screen printing device according to claim 1, characterized in that, The adhesive scraping moving track (41) includes a vertical guide rail and a horizontal guide rail.

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