Elastic curved surface glass screen printing jig

Abstract

The utility model relates to an elastic curved surface glass screen printing jig which is placed on a machine table of a screen printing machine and comprises a jig base and a supporting strip. The jig base is provided with a containing groove, the containing groove is used for containing elastic curved glass, a negative pressure adsorption groove is further formed in the center of the groove bottom of the containing groove, and a plurality of negative pressure adsorption holes are formed in the groove bottom of the negative pressure adsorption groove. The supporting strip is installed in the negative pressure adsorption groove, and the elastic curved glass silk-screen jig has a to-be-silk-screen state in which the elastic curved glass is sucked to be flat or a silk-screen completion state in which the elastic curved glass is restored. According to the technical scheme, the problem that in the prior art, when screen printing is conducted on the elastic curved glass, effective fixing cannot be achieved is effectively solved.

Description

Technical Field

[0001] This application relates to the technical field of screen printing equipment, and more specifically, to a flexible curved glass screen printing fixture. Background Technology

[0002] As people's living standards continue to improve, their demands for display lighting products are also increasing. To enhance the immersive experience of watching images, curved screens are increasingly being used in various fields. For curved screens to improve display quality, a matching curved backlight module is required, and the curved glass light guide plate is a crucial component of this module. Existing screen printing technology can only print on flat glass panels and cannot print on hot-bent curved glass panels.

[0003] Some existing devices (e.g., authorized publication number: CN 208497907 U, entitled "A Screen Printing Device for Curved Glass Light Guide Plate") place the curved glass plate on the curved boss, select a squeegee bracket with a curvature matching curve guide rail, and install the squeegee bracket at the output end of the first lifting mechanism. Select a curved screen printing plate with curvature matching, and lock the curved screen printing plate in the screen mounting frame with locking screws. The first lifting mechanism drives the squeegee bracket and the screen mounting frame to descend until the curved screen printing plate is in close contact with the surface of the curved glass plate. At the same time, the squeegee contacts the curved screen printing plate, and the squeegee drive mechanism drives the slider to move along the curve guide rail, thereby driving the squeegee to print light guide ink on the surface of the curved glass plate along the curve through the curved screen printing plate, so as to achieve printing on curved glass.

[0004] In actual production, the same method is used when screen printing elastic curved glass. Because elastic curved glass has the ability to deform elastically, elastic curved glass with different curvatures can use the same curved boss. However, the position and number of negative pressure holes on the curved boss are fixed, and the negative pressure provided by the negative pressure holes is limited. Therefore, in practical applications, it is difficult to completely adsorb and bond elastic curved glass with different curvatures, which affects the screen printing quality. Utility Model Content

[0005] This application provides a screen printing fixture for flexible curved glass to solve the problem in the prior art that it is impossible to achieve effective fixation when screen printing on flexible curved glass.

[0006] According to this application, a flexible curved glass screen printing fixture is placed on the machine table of a screen printing machine and includes: a fixture base and a support strip. The fixture base has a placement groove for placing flexible curved glass, and a negative pressure adsorption groove is also formed at the center of the bottom of the placement groove. The bottom of the negative pressure adsorption groove has multiple negative pressure adsorption holes. The support strip is installed in the negative pressure adsorption groove. The flexible curved glass screen printing fixture can be in a screen printing ready state where the flexible curved glass is flattened, or in a screen printing completed state where the flexible curved glass is restored.

[0007] In some embodiments, the flexible curved glass screen printing fixture further includes a support block, which is placed in the middle of the negative pressure adsorption tank and the height of the support block is flush with the bottom of the tank. At least two sets of support bars are provided, with the two sets of support bars located on both sides of the support block. Both sets of support bars are cross-shaped or star-shaped.

[0008] In some embodiments, both the placement tank and the negative pressure adsorption tank are rectangular tanks, the inner circumferential wall of the placement tank is provided with an anti-cavity groove, and the outer wall of the placement tank is provided with a scale.

[0009] In some embodiments, a groove is provided on the side of the fixture base away from the placement groove, and the negative pressure adsorption hole connects the negative pressure adsorption groove and the groove.

[0010] In some embodiments, the fixture base has two sets of sliding grooves on the side opposite to the placement groove. The two sets of sliding grooves are located on both sides of the groove, and both sets of sliding grooves are arranged along the extension direction of the fixture base. The screen printing machine is provided with two sets of slide rails, and the two sets of slide rails and the two sets of sliding grooves are arranged in a one-to-one correspondence. The elastic curved glass screen printing fixture is movably placed on the screen printing machine.

[0011] In some embodiments, the flexible curved glass screen printing fixture also includes an anti-scratch pad, which is laid on the bottom of the placement groove and covers the negative pressure adsorption groove. The anti-scratch pad is mesh-like and made of Teflon material.

[0012] In some embodiments, the ratio of the bottom area of ​​the negative pressure adsorption tank to the bottom area of ​​the placement tank is between 1:1 and 1.5:1.

[0013] This application also provides a flattening structure, which is placed on the machine table of a screen printing machine. The flattening structure and the elastic curved glass screen printing fixture are correspondingly arranged. The elastic curved glass screen printing fixture is the elastic curved glass screen printing fixture of any one of claims 1 to 7.

[0014] In some embodiments, the flattening structure includes a lifting rod, a supporting beam, and two sets of supporting columns. The two sets of supporting columns are installed on the machine platform of the screen printing machine and are located on both sides of the elastic curved glass screen printing fixture. The two ends of the supporting beam are connected to the two sets of supporting columns respectively. The supporting beam is located above the elastic curved glass screen printing fixture. The lifting rod is arranged on the supporting beam and faces the elastic curved glass screen printing fixture.

[0015] In some embodiments, the lifting rod is a cylinder, and the flattening structure further includes a pressure plate, which is disposed on the lifting rod. In the vertical projection, the area of ​​the pressure plate is larger than the area of ​​the negative pressure adsorption tank.

[0016] Using the technical solution of this application, a flexible curved glass screen printing fixture is placed on the screen printing machine. The flexible curved glass screen printing fixture includes a fixture base and a support strip. The fixture base has a placement groove for placing the flexible curved glass. A negative pressure adsorption groove is also formed at the center of the bottom of the placement groove. Therefore, the negative pressure adsorption groove can correspond to the position of the maximum curvature of the flexible curved glass, flattening the flexible curved glass. The bottom of the negative pressure adsorption groove has multiple negative pressure adsorption holes to maintain a negative pressure environment within the negative pressure adsorption groove. The support strip is installed inside the negative pressure adsorption groove and can abut against the flexible curved glass to prevent the flexible curved glass from bending towards the bottom of the negative pressure adsorption groove due to excessive negative pressure. Because the negative pressure adsorption groove has a larger adsorption range and greater adsorption force on the flexible curved glass, it can effectively adsorb and fix the flexible curved glass. The flexible curved glass screen printing fixture has a pre-screening state where the flexible curved glass is flattened. By converting the flexible curved glass from 3D to 2D for screen printing, the screen printing quality can be significantly improved. The fixture also has a completed screen printing state where the flexible curved glass is restored to its original curvature. After screen printing, the negative pressure adsorption is stopped, and the flexible curved glass returns to its original curvature. The technical solution of this application effectively solves the problem of ineffective fixation when screen printing on flexible curved glass in the prior art. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0018] 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, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A front structural schematic diagram of the elastic curved glass screen printing fixture according to an embodiment of this application is shown;

[0020] Figure 2 A schematic diagram of the back structure of the elastic curved glass screen printing fixture according to an embodiment of this application is shown;

[0021] Figure 3 A schematic diagram showing the fit between the flattening structure and the elastic curved glass screen printing fixture according to an embodiment of this application is shown.

[0022] The above figures include the following reference numerals:

[0023] 10. Flexible curved glass screen printing fixture; 11. Fixture base; 111. Placement groove; 112. Negative pressure adsorption groove; 113. Negative pressure adsorption hole; 114. Groove; 115. Slide groove; 12. Support bar; 13. Support block; 20. Flattening structure; 21. Lifting rod; 22. Support beam; 23. Support column; 24. Pressure plate. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0026] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, rotated 90 degrees, or in other orientations, and the spatial relative descriptions used herein will be interpreted accordingly.

[0027] like Figure 1 and Figure 2As shown, the embodiment relates to a flexible curved glass screen printing fixture 10, which is placed on the machine table of a screen printing machine. The fixture includes a fixture base 11 and a support bar 12. The fixture base 11 has a placement groove 111 for placing the flexible curved glass. A negative pressure adsorption groove 112 is also provided at the center of the bottom of the placement groove 111, and multiple negative pressure adsorption holes 113 are provided at the bottom of the negative pressure adsorption groove 112. The support bar 12 is installed in the negative pressure adsorption groove 112. The flexible curved glass screen printing fixture 10 can be in a screen printing ready state where the flexible curved glass is flattened, or in a screen printing completed state where the flexible curved glass is restored.

[0028] Using the technical solution of this embodiment, the flexible curved glass screen printing fixture 10 is placed on the machine table of the screen printing machine. The flexible curved glass screen printing fixture 10 includes: a fixture base 11 and a support bar 12. The fixture base 11 has a placement groove 111 for placing the flexible curved glass. A negative pressure adsorption groove 112 is also provided at the center of the bottom of the placement groove 111. Therefore, the negative pressure adsorption groove 112 can correspond to the position with the largest curvature of the flexible curved glass, and flatten the flexible curved glass. The bottom of the negative pressure adsorption groove 112 has multiple negative pressure adsorption holes 113 to maintain the negative pressure environment in the negative pressure adsorption groove. The support bar 12 is installed in the negative pressure adsorption groove 112. The support bar 12 can abut against the flexible curved glass to prevent the flexible curved glass from bending towards the bottom of the negative pressure adsorption groove 112 due to excessive negative pressure. Because the negative pressure adsorption tank 112 has a larger adsorption range and greater adsorption force on the elastic curved glass, it can effectively adsorb and fix the elastic curved glass. The elastic curved glass screen printing fixture has a pre-screening state where the elastic curved glass is flattened. By converting the elastic curved glass from 3D to 2D for screen printing, the screen printing quality can be significantly improved. The elastic curved glass screen printing fixture 10 also has a completed screen printing state where the elastic curved glass is restored. After screen printing is completed, the negative pressure adsorption is stopped, and the elastic curved glass returns to its original curvature. The technical solution of this embodiment effectively solves the problem in the prior art that effective fixation cannot be achieved when screen printing on elastic curved glass.

[0029] like Figure 1As shown, in some embodiments, the flexible curved glass screen printing fixture 10 further includes a support block 13. The support block 13 is placed in the middle of the negative pressure adsorption groove 112, and its height is flush with the bottom of the placement groove 111. The support block 13 corresponds to the position where the curvature of the flexible curved glass is the greatest, and the flexible curved glass is limited by abutment to prevent excessive bending. At least two sets of support bars 12 are provided, with the two sets of support bars 12 located on both sides of the support block 13. The height of the support bars 12 is flush with the bottom of the placement groove 111. The support bars 12 can cooperate with the support block 13 to abut the flexible curved glass. Both sets of support bars 12 are cross-shaped or star-shaped. The support bars 12 are equivalent to dividing the entire negative pressure adsorption groove 112 into multiple connected negative pressure adsorption grooves, which can both ensure negative pressure and provide support for the flexible curved glass.

[0030] like Figure 1 As shown, in some embodiments, both the placement groove 111 and the negative pressure adsorption groove 112 are rectangular grooves. The circumferential inner wall of the placement groove 111 has a clearance groove, which is a long groove formed on each of the four rectangular inner walls of the placement groove 111. The clearance groove is circumferentially opposite to the elastic curved glass. This arrangement aims to reduce the contact area between the placement groove 111 and the elastic curved glass, preventing scratches on the circumferential surface of the elastic curved glass. The outer wall of the placement groove 111 has graduations, both in the width and length directions. When placing elastic curved glass of different sizes, the position of the elastic curved glass can be determined using the graduations to prevent scratches from the placement groove 111.

[0031] It should be noted that the transfer of the flexible curved glass is achieved through a robotic arm equipped with suction cups. The suction cups are connected to an external negative pressure generator via pipes. The flexible curved glass is placed by the suction cups.

[0032] like Figure 2 As shown, in some embodiments, a groove 114 is provided on the side of the fixture base 11 facing away from the placement groove 111. A negative pressure hole is provided on the side wall of the fixture base 11. One end of the negative pressure hole is connected to the groove 114, and the other end is connected to one end of a negative pressure tube. The other end of the negative pressure tube is connected to a negative pressure generator. The groove 114 fits snugly against the base of the screen printing machine to achieve a seal, thus maintaining the internal space of the groove 114 as a negative pressure space. The negative pressure adsorption hole 113 connects the negative pressure adsorption tank 112 and the groove 114, so the internal space of the negative pressure adsorption tank 112 is also a negative pressure space. Simultaneously, the groove 114 makes the negative pressure inside the negative pressure adsorption tank 112 less prone to fluctuation and more stable. It should be noted that providing a negative pressure hole on the side wall of the fixture base 11 not only achieves communication with the groove 114 but also ensures that the flexible curved glass screen printing fixture is not affected by the negative pressure tube when moving.

[0033] like Figure 2 As shown, in some embodiments, the jig base 11 also has two sets of sliding grooves 115 on the side opposite to the placement groove 111. The two sets of sliding grooves 115 are located on both sides of the groove 114, and the two sets of sliding grooves 115 are arranged along the extension direction of the jig base 11. The machine table of the screen printing machine is provided with two sets of slide rails. The two sets of slide rails and the two sets of sliding grooves 115 are arranged in a one-to-one correspondence. The slide rails are located in the sliding grooves 115, so that the elastic curved glass screen printing jig 10 can be movably placed on the machine table of the screen printing machine. After the elastic curved glass is installed and flattened, it is moved to the bottom of the screen printing structure for screen printing operation.

[0034] It should be noted that the screen printing machine's base is sequentially equipped with a cylinder, a flattening structure, a flexible curved glass screen printing fixture, and a screen printing structure. The piston rod of the cylinder is connected to the flexible curved glass screen printing fixture. The movement of the flexible curved glass screen printing fixture is achieved by the extension and retraction of the piston rod. When the piston rod retracts, the flexible curved glass screen printing fixture is located below the flattening structure; when the piston rod extends, the flexible curved glass screen printing fixture is located below the screen printing structure. The specific working process is as follows: a suction cup picks up the flexible curved glass, a robotic arm moves the flexible curved glass and places it on the flexible curved glass screen printing fixture. The flattening structure descends to flatten the flexible curved glass. After the flexible curved glass is adsorbed and fixed by the screen printing fixture, the cylinder pushes the flexible curved glass screen printing fixture to move below the screen printing structure for screen printing.

[0035] It should also be noted that the screen printing structure includes a support frame, a screen printing stencil, a screen printing stencil mounting frame, a support plate, an ink tank, and a squeegee. The support frame is located on the screen printing machine platform and has two sets of vertical plates and one set of horizontal plates. The two ends of the horizontal plate are connected to the two sets of vertical plates respectively. The screen printing stencil is placed inside the screen printing stencil mounting frame. When the flexible curved glass screen printing fixture moves to below the horizontal plate, the screen printing stencil mounting frame with the screen printing stencil is placed above the flexible curved glass screen printing fixture. The support plate is movably mounted on the horizontal plate through connecting columns. The ink tank and squeegee are mounted on the support plate. The ink tank is located above the screen printing stencil and has an ink outlet. The squeegee moves with the support plate to make the ink distribution more uniform.

[0036] In some embodiments, the flexible curved glass screen printing fixture 10 also includes an anti-scratch pad, which is laid on the bottom of the placement groove 111 and covers the negative pressure adsorption groove 112. The anti-scratch pad is mesh-like and made of Teflon material, so that the anti-scratch pad can not affect the negative pressure effect and can also play an anti-scratch effect.

[0037] In some embodiments, the edges of the elastic curved glass abut against the placement groove 111, while the central area with a larger curvature is flattened by the strong adsorption of the negative pressure adsorption groove 112 and abuts against the support strip 12 and the support block 13. The ratio of the bottom area of ​​the negative pressure adsorption groove 112 to the bottom area of ​​the placement groove 111 is between 1:1 and 1.5:1. The purpose of this arrangement is to ensure that the adsorption area of ​​the negative pressure adsorption groove 112 and the support area of ​​the placement groove 111 can be balanced. If the adsorption area of ​​the negative pressure adsorption groove 112 is too large, the part not supported by the support strip 12 and the support block 13 will undergo local deformation. If the support area of ​​the placement groove 111 is too large, the elastic curved glass cannot be flattened and therefore cannot be completely fitted to the bottom of the placement groove 111, thus failing to achieve effective fixation and affecting the subsequent screen printing quality.

[0038] This embodiment also provides a flattening structure 20, which is placed on the machine base of a screen printing machine. The flattening structure 20 and the elastic curved glass screen printing fixture 10 are correspondingly arranged. The flattening structure 20 includes a lifting rod 21, a supporting beam 22, and two sets of supporting columns 23. The two sets of supporting columns 23 are installed on the base of the screen printing machine and are located on both sides of the elastic curved glass screen printing fixture 10. The two ends of the supporting beam 22 are connected to the two sets of supporting columns 23 respectively. The supporting beam 22 is located above the elastic curved glass screen printing fixture 10. The lifting rod 21 is arranged on the supporting beam 22 and faces the elastic curved glass screen printing fixture 10. The flattening structure 20 also includes a pressure plate 24, which is arranged on the lifting rod 21. The lifting rod 21 is a cylinder. The cylinder body of the lifting rod 21 is connected to the supporting beam 22, and the piston rod of the lifting rod 21 is connected to the pressure plate 24 to drive the pressure plate 24 to rise and fall. In the vertical projection, the area of ​​the pressure plate 24 is larger than the area of ​​the negative pressure adsorption groove 112. The purpose of this setting is to ensure that the pressure plate 24 can abut against the bottom of the placement groove 111 after being pressed down, thereby achieving complete flattening of the elastic curved glass.

[0039] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0040] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0041] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A flexible curved glass screen printing fixture, wherein the flexible curved glass screen printing fixture is placed on the machine table of a screen printing machine, characterized in that, include: The fixture base (11) has a placement groove (111) for placing elastic curved glass. A negative pressure adsorption groove (112) is also provided at the center of the bottom of the placement groove (111). A plurality of negative pressure adsorption holes (113) are provided at the bottom of the negative pressure adsorption groove (112). Support bar (12), the support bar (12) is installed in the negative pressure adsorption tank (112), the elastic curved glass screen printing fixture (10) has a screen printing state in which the elastic curved glass is flattened, or a screen printing completed state in which the elastic curved glass is restored.

2. The elastic curved glass screen printing fixture according to claim 1, characterized in that, The elastic curved glass screen printing fixture (10) also includes a support block (13), which is placed in the middle of the negative pressure adsorption groove (112), and the height of the support block (13) is flush with the bottom of the placement groove (111). At least two sets of support bars (12) are provided, and the two sets of support bars (12) are located on both sides of the support block (13). Both sets of support bars (12) are cross-shaped or star-shaped.

3. The elastic curved glass screen printing fixture according to claim 1, characterized in that, Both the placement groove (111) and the negative pressure adsorption groove (112) are rectangular grooves. The inner circumferential wall of the placement groove (111) is provided with an anti-airway groove, and the outer wall of the placement groove (111) is provided with a scale.

4. The elastic curved glass screen printing fixture according to claim 1, characterized in that, The fixture base (11) has a groove (114) on the side away from the placement groove (111), and the negative pressure adsorption hole (113) connects the negative pressure adsorption groove (112) and the groove (114).

5. The elastic curved glass screen printing fixture according to claim 4, characterized in that, The fixture base (11) has two sets of sliding grooves (115) on the side away from the placement groove (111). The two sets of sliding grooves (115) are located on both sides of the groove (114), and the two sets of sliding grooves (115) are arranged along the extension direction of the fixture base (11). The screen printing machine is provided with two sets of slide rails. The two sets of slide rails and the two sets of sliding grooves (115) are arranged in a one-to-one correspondence. The elastic curved glass screen printing fixture (10) is movably placed on the screen printing machine.

6. The elastic curved glass screen printing fixture according to any one of claims 1 to 5, characterized in that, The elastic curved glass screen printing fixture (10) also includes an anti-scratch pad, which is laid on the bottom of the placement groove (111) and covers the negative pressure adsorption groove (112). The anti-scratch pad is mesh and made of Teflon material.

7. The elastic curved glass screen printing fixture according to claim 1, characterized in that, The ratio of the bottom area of ​​the negative pressure adsorption tank (112) to the bottom area of ​​the placement tank (111) is between 1:1 and 1.5:1.

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