Screen printing device

Abstract

The silk-screen printing device comprises a bottom plate, a silk-screen printing screen plate and a scraper assembly, and the bottom plate is provided with an operation face; the silk screen plate is connected to the bottom plate and covers the operation surface; the scraper assembly comprises a supporting frame, a driving part and a scraper plate, the supporting frame is slidably connected to the bottom plate, the driving part is installed on the supporting frame, the scraper plate is rotatably connected to the output end of the driving part, and the driving part is used for driving the scraper plate to be close to or away from the silk screen plate. The acting force of the scraper plate and the screen printing screen plate can be flexibly adjusted through the driving part, meanwhile, the scraper plate is rotationally connected to the output end of the driving part, so that the contact position of the scraper plate and the screen printing screen plate can be automatically adjusted in the scraping process of the scraper plate, and the risk that the screen printing screen plate is deformed or damaged due to the fact that the scraper plate is obliquely inserted into the screen printing screen plate is reduced.

Description

Technical Field

[0001] The present application belongs to the field of printing technology, and specifically relates to a screen printing device. Background Art

[0002] Screen printing technology is to first make the text or pattern to be printed into a screen, install it on a printing machine, and then use a scraper to squeeze the slurry on the screen, so that the slurry passes through the image part in the screen, and the slurry is transferred to the substrate to be printed through the mesh of the image part, thereby forming a preset text or pattern on the substrate. Screen printing is widely used in industry, for example, it can be used in the grid electrode forming process of the solar cell production process.

[0003] In current printing machines, a scraper is fixed in a movable travel mechanism, and the scraper is moved on the screen by manual or mechanical drive to squeeze the slurry on the screen, so that the slurry passes through the mesh holes in the screen and is printed on the substrate. However, when using an existing printing machine for printing, when the parallelism between the scraper blade and the screen surface is too different, the scraper is easy to be inserted into the screen obliquely, causing the screen to deform or break, affecting the use of the screen. Utility Model Content

[0004] The present application aims to provide a screen printing device that can solve the problem that when an existing printing machine is used for printing, when the parallelism between the scraper blade and the screen surface differs too much, the scraper is easily inserted obliquely into the screen, causing deformation or damage to the screen.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] The present application embodiment provides a screen printing device, comprising:

[0007] A bottom plate, wherein the bottom plate is provided with an operating surface;

[0008] A silk screen screen, the silk screen screen is connected to the bottom plate, and the silk screen screen covers the operation surface;

[0009] The scraper assembly includes a support frame, a driving member and a scraper plate, wherein the support frame is slidably connected to the base plate, the driving member is installed on the support frame, and the scraper plate is rotatably connected to the output end of the driving member, and the driving member is used to drive the scraper plate to approach or move away from the screen printing screen.

[0010] Optionally, the support frame includes: a first bracket and a second bracket; the first bracket is slidably connected to the base plate, the first bracket is provided with a clamping portion at one end away from the base plate, the end of the second bracket is clamped to the clamping portion, and the driving member is installed on the second bracket.

[0011] Optionally, the scraper assembly further comprises a clamping member, wherein the clamping member is fixedly connected to the driving member, and the clamping member is clamped to the second bracket.

[0012] Optionally, a limiting groove extending along the axial direction of the second bracket is provided in the second bracket, and a protrusion is provided on the side of the clamping member facing the second bracket, and the protrusion is slidably connected in the limiting groove.

[0013] Optionally, a slide rail and a slider are provided on the bottom plate, the slide rail extends along the first direction, the slider is slidably connected to the slide rail, and the first bracket is fixedly connected to the slider.

[0014] Optionally, the scraper assembly further includes a bearing, a mounting hole is provided in the scraper plate, the bearing is arranged in the mounting hole, a rotating shaft is provided on the output end, and the rotating shaft is rotatably connected to the bearing.

[0015] Optionally, it also includes a fixing plate, which is placed between the operating surface and the screen printing screen, and at least one accommodating groove is provided in the fixing plate, and the accommodating groove is used to place the substrate to be printed; the edge of the bottom plate is provided with scale lines.

[0016] Optionally, an adsorption structure is provided in the operation surface, and the adsorption structure is in contact with the fixing plate;

[0017] The adsorption structure includes a plurality of adsorption holes arranged in the operating surface, and a vacuum chamber arranged inside the bottom plate, wherein the plurality of adsorption holes are respectively connected to the vacuum chamber, and the vacuum chamber is suitable for being connected to a negative pressure mechanism, and the negative pressure mechanism provides negative pressure to the plurality of adsorption holes through the vacuum chamber to adsorb and fix the fixed plate.

[0018] Optionally, the fixed plate includes a plate body and extension portions arranged at both ends of the plate body; the plate body is placed between the operating surface and the silk screen screen, the accommodating groove is arranged in the plate body, one end of the extension portion is connected to the plate body, and the other end of the extension portion extends outward from the operating surface.

[0019] Optionally, a first step portion is provided in the bottom plate around the operating surface, and a second step portion is provided on a side of the silk-screen screen facing the bottom plate, and the second step portion is positioned and matched with the first step portion.

[0020] In the embodiment of the present application, a screen printing screen is arranged on the operating surface of the bottom plate, a support frame is slidably connected to the bottom plate, a driving member is installed on the support frame, and a scraper plate is rotatably connected to the output end of the driving member. In this way, the driving member can be used to drive the scraper plate to approach or move away from the screen printing screen, so as to flexibly adjust the force between the scraper plate and the screen printing screen. At the same time, the scraper plate is rotatably connected to the output end of the driving member, so that the contact position with the screen printing screen can be automatically adjusted during the scraper plate scraping process, which can not only improve the scraping uniformity of the scraper plate, but also reduce the risk of deformation or damage of the screen printing screen caused by the scraper plate obliquely inserted into the screen printing screen.

[0021] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 is a schematic diagram of a screen printing device according to an embodiment of the present application;

[0024] Figure 2 is a schematic diagram of the matching structure of the fixing plate and the bottom plate according to an embodiment of the present application;

[0025] Figure 3 is a schematic diagram of the matching structure of the scraper plate and the driving member according to an embodiment of the present application;

[0026] Figure 4 is a schematic diagram of the matching structure of the driving member and the supporting frame according to an embodiment of the present application;

[0027] Figure 5 is a schematic diagram of a base plate according to an embodiment of the present application;

[0028] Figure 6 is a schematic diagram of a lower base plate according to an embodiment of the present application;

[0029] Figure 7 is a schematic diagram of a fixing plate according to an embodiment of the present application;

[0030] Figure 8 is a front schematic diagram of a silk screen screen according to an embodiment of the present application;

[0031] Fig. 9 is a schematic diagram of the back side of a silk screen printing plate according to an embodiment of the present application;

[0032] Fig.10 is one of the assembly schematic diagrams of the screen printing device according to an embodiment of the present application;

[0033] Fig.11 is a second assembly schematic diagram of a screen printing device according to an embodiment of the present application;

[0034] Fig.12 This is the third assembly diagram of the screen printing device according to the embodiment of the present application.

[0035] Reference numerals:

[0036] 100: bottom plate; 100a: operation surface; 101: upper bottom plate; 102: lower bottom plate; 110: slide rail; 120: slider; 130: adsorption structure; 1301: adsorption hole; 1302: vacuum chamber; 140: first step portion; 150: scale line;

[0037] 200: fixing plate; 200a: receiving groove; 210: plate body; 220: extension portion;

[0038] 300: screen printing screen; 301: frame; 302: mesh; 310: second step portion;

[0039] 400: scraper assembly; 410: support frame; 411: first bracket; 4111: clamping part; 412: second bracket; 4121: limiting groove; 420: driving member; 421: output end; 4211: rotating shaft; 430: scraper plate; 4301: mounting hole; 440: clamping member; 4401: raised part; 450: bearing; X: first direction; Y: second direction; α: scraping angle. DETAILED DESCRIPTION

[0040] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0041] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0042] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0043] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] The screen printing device provided in the embodiment of the present application is described in detail below through specific embodiments and application scenarios in conjunction with the accompanying drawings.

[0045] like Figure 1 and Figure 2 As shown, according to some embodiments of the present application, the screen printing device includes: a base plate 100, a screen printing plate 300 and a scraper assembly 400, the base plate 100 is provided with an operating surface 100a; the screen printing plate 300 is connected to the base plate 100, and the screen printing plate 300 covers the operating surface 100a; the scraper assembly 400 includes a support frame 410, a driving member 420 and a scraper plate 430, the support frame 410 is slidably connected to the base plate 100 along a first direction X, the driving member 420 is installed on the support frame 410, and the scraper plate 430 is rotatably connected to the output end 421 of the driving member 420, and the driving member 420 is used to drive the scraper plate 430 to move closer to or away from the screen printing plate 300.

[0046] In the embodiment of the present application, the screen printing screen 300 is arranged on the operation surface 100a of the bottom plate 100, the support frame 410 is connected to the bottom plate 100 in a sliding manner along the first direction X, the driving member 420 is installed on the support frame 410, and the scraper plate 430 is rotatably connected to the output end 421 of the driving member 420. In this way, the driving member 420 can be used to drive the scraper plate 430 to approach or move away from the screen printing screen 300, so as to flexibly adjust the force between the scraper plate 430 and the screen printing screen 300. At the same time, the scraper plate 430 is rotatably connected to the output end 421 of the driving member 420, so that the contact position with the screen printing screen 300 can be automatically adjusted during the scraper plate 430 scraping process, which can improve the scraping uniformity of the scraper plate 430 and reduce the risk of deformation or damage of the screen printing screen 300 caused by the scraper plate 430 obliquely inserted into the screen printing screen 300.

[0047] It is understandable that the screen printing device in the embodiment of the present application can be applied to the grid electrode forming process of the solar cell production process, and the screen printing device can be used to print metal grid lines on the surface of the solar cell. Of course, the screen printing device can also be applied to other printing scenarios and can be flexibly set according to actual needs, which is not limited in the embodiment of the present application.

[0048] Optionally, the screen printing device further comprises a fixing plate 200, the fixing plate 200 is placed between the operating surface 100a and the screen printing plate 300, and at least one receiving groove 200a is provided in the fixing plate 200, and the receiving groove 200a is used to place the substrate to be printed.

[0049] Specifically, a fixing plate 200 is arranged on the operation surface 100a of the bottom plate 100, and a receiving groove 200a is arranged in the fixing plate 200. The receiving groove 200a can be used to place the substrate to be printed, and the receiving groove 200a can play a role of limiting and fixing the substrate.

[0050] Among them, one or more accommodating grooves 200a may be provided in the fixed plate 200, and the structure of each accommodating groove 200a may be determined according to the structure of the corresponding substrate, and the structures of different accommodating grooves 200a may be the same or different. During the printing operation, the position of the fixed plate 200 on the bottom plate 100 may be adjusted, that is, the position of the substrate to be printed on the bottom plate 100 may be adjusted to selectively print the substrate, thereby meeting the requirements of different printing scenarios.

[0051] It should be noted that the fixing plate 200 is placed on the operating surface 100a, and the fixing plate 200 and the base plate 100 can be connected and fixed by means of snap-fitting, plug-in, negative pressure adsorption, etc., so as to avoid large displacement of the fixing plate 200 on the operating surface 100a during printing.

[0052] Furthermore, a screen printing screen 300 is arranged on the side of the fixed plate 200 away from the operating surface 100a, so that the screen printing screen 300 at least covers the receiving groove 200a in the fixed plate 200, so as to perform a printing operation on the substrate in the receiving groove 200a. The screen printing screen 300 is detachably connected to the bottom plate 100, which is convenient for the installation and removal of the screen printing screen 300. For example, threaded holes can be respectively arranged on the bottom plate 100 and the screen printing screen 300, and screws are sequentially connected to the threaded holes in the screen printing screen 300 and the bottom plate 100 during installation, so as to install and fix the screen printing screen 300 on the bottom plate 100.

[0053] In some embodiments, Figure 8 As shown, the silk screen screen 300 may include a gauze 302 and a frame 301. The gauze 302 is made of a mesh woven from materials such as stainless steel or tungsten steel. The frame 301 is connected to the edges of the gauze 302. The frame 301 is used to be connected and fixed to the base plate 100. A polyimide film and a photosensitive film are coated on the gauze 302, and the photosensitive adhesive at the pattern design opening is removed according to the preset printing pattern.

[0054] In a specific application, by pushing the scraper plate 430 to move on the screen printing screen 300, the slurry on the screen printing screen 300 can be pressed into the opening of the screen printing screen 300 at a certain speed and angle by utilizing the squeezing effect of the scraper plate 430, and then a preset pattern is printed on the substrate. During the movement of the scraper plate 430, if the pressure applied by the scraper plate 430 is too large, the friction between the scraper plate 430 and the screen printing screen 300 will increase, which may easily cause the screen printing screen 300 to deform or even break. If the pressure applied by the scraper plate 430 is too small, the slurry cannot be fully pressed onto the substrate, resulting in a false printing problem.

[0055] In the embodiment of the present application, the scraper assembly 400 includes a support frame 410, a driving member 420 and a scraper plate 430. The support frame 410 is slidably connected to the bottom plate 100, the driving member 420 is installed on the support frame 410, and the scraper plate 430 is connected to the output shaft 421 of the driving member 420. Furthermore, the driving member 420 can be used to drive the scraper plate 430 to approach or move away from the screen printing screen 300, so that the squeezing force between the scraper plate 430 and the screen printing screen 300 can be flexibly adjusted during the printing operation, thereby ensuring that the scraper plate 430 has an effective squeezing effect on the slurry, and avoiding the scraper plate 430 from causing damage to the screen printing screen 300 due to excessive squeezing force.

[0056] In addition, the scraper plate 430 is rotatably connected to the output end 421 of the driving member 420, so that the scraper plate 430 can rotate freely relative to the output end 421 of the driving member 420, so that during the printing operation, the contact position with the screen printing screen 300 can be adjusted by the free rotation of the scraper plate 430, so that the blade surface of the scraper plate 430 and the surface of the screen printing screen 300 always maintain a relatively reasonable parallelism. In this way, it can be avoided that the scraper plate 430 is obliquely inserted into the screen printing screen 300 due to the large difference in parallelism between the blade surface of the scraper plate 430 and the surface of the screen printing screen 300, causing deformation and damage to the screen printing screen 300, and at the same time, it can ensure the uniformity of scraping materials at different positions of the scraper plate 430, thereby improving the printing effect.

[0057] It should be noted that the driving member 420 may be a cylinder driving mechanism, a motor driving mechanism or a hydraulic driving mechanism, etc., and may be flexibly selected according to actual needs, and the embodiment of the present application does not limit this.

[0058] Alternatively, if Figure 3 As shown, the scraper assembly 400 also includes a bearing 450 , a mounting hole 4301 is provided in the scraper plate 430 , the bearing 450 is disposed in the mounting hole 4301 , a rotating shaft 4211 is provided on the output end 421 of the driving member 420 , and the scraper plate 430 is rotatably connected to the rotating shaft 4211 through the bearing 450 .

[0059] In the embodiment of the present application, a bearing 450 is provided between the mounting hole 4301 of the scraper plate 430 and the rotating shaft 4211 of the output end 421 of the driving member 420. The bearing 450 can be used to improve the rotation flexibility of the scraper plate 430 and reduce the friction on the scraper plate 430 during rotation, so that the scraper plate 430 can be automatically adjusted to be highly fitted with the surface of the silk screen plate 300.

[0060] Among them, the bearing 450 can be made of different types of bearing structures such as ball bearings, roller bearings, etc., which can be flexibly selected according to actual conditions and are not limited here.

[0061] Alternatively, if Figure 1 and Figure 2 As shown, the support frame 410 includes a first bracket 411 and a second bracket 412; the first bracket 411 is slidably connected to the bottom plate 100 along the first direction X, a clamping portion 4111 is provided at one end of the first bracket 411 away from the bottom plate 100, the second bracket 412 is clamped to the clamping portion 4111, and the driving member 420 is installed on the second bracket 412. In a specific application, the position of the second bracket 412 can be adjusted by rotating around the second direction Y, and the second direction Y intersects with the first direction X.

[0062] In the embodiment of the present application, by providing a first bracket 411 and a second bracket 412, the first bracket 411 is slidably connected to the bottom plate 100 along the first direction X, and the position of the scraper plate 430 along the first direction X can be adjusted by using the first bracket 411. Then, the second bracket 412 is clamped to the clamping portion 4111 on the first bracket 411, and the matching position of the second bracket 412 and the clamping portion 4111 can be adjusted by rotating around the second direction Y, so as to adjust the matching angle between the scraper plate 430 and the screen printing screen 300, that is, the scraping angle α. In this way, it is convenient for actual assembly and use, and it is also convenient for flexible adjustment of the scraping angle α of the scraper plate 430.

[0063] Specifically, first brackets 411 may be respectively provided on both sides of the screen printing screen 300 along the second direction Y, the first brackets 411 are slidably connected to the bottom plate 100 along the first direction X, and the second brackets 412 are mounted on the two first brackets 411 along the second direction Y. Furthermore, a clamping portion 4111 is provided at one end of the first bracket 411 away from the bottom plate 100, and the clamping portion 4111 may include a first clamping portion and a second clamping portion, and a first clamping hole is formed by the first clamping portion and the second clamping portion, and an end of the second bracket 412 is clamped in the first clamping hole.

[0064] In a specific application, a bolt can be provided to pass through the first clamping part and the second clamping part in sequence and cooperate with a nut. During assembly, the end of the second bracket 412 is inserted into the first clamping hole, and the angle of the second bracket 412 is adjusted by rotation to adjust the matching angle of the scraper plate 430 and the screen printing screen 300, that is, the scraping angle α, to a preset angle. Then, the first clamping part and the second clamping part are locked by tightening the bolt to adjust the size of the first clamping hole, and the second bracket 412 can be clamped and fixed by the first clamping part and the second clamping part.

[0065] Alternatively, if Figure 4 As shown, the scraper assembly 400 further includes a clamping member 440 , which is fixedly connected to the driving member 420 , and the clamping member 440 is clamped to the second bracket 412 .

[0066] In the embodiment of the present application, the driving member 420 is provided with a clamping member 440, and the driving member 420 is mounted and fixed to the second bracket 412 by the clamping member 440, so as to facilitate the actual assembly and disassembly. At the same time, the clamping member 440 is clamped to the outer side of the second bracket 412, and the position of the scraper plate 430 along the second direction Y can be adjusted by adjusting the clamping position of the clamping member 440 and the second bracket 412 along the second direction Y.

[0067] Specifically, the clamping member 440 is fixedly mounted on the driving member 420, a second clamping hole is formed in the clamping member 440, the second bracket 412 is passed through the second clamping hole, and a bolt structure can be set in the clamping member 440. The size of the second clamping hole in the clamping member 440 can be adjusted through the bolt structure to clamp and fix the second bracket 412.

[0068] In a specific application, the second bracket 412 can be inserted into the second clamping hole of the clamping member 440. By moving the driving member 420 along the second direction Y, the matching position of the scraper plate 430 and the silk screen screen 300 can be adjusted, and then tightening the bolt structure can clamp and fix the clamping member 440 and the second bracket 412.

[0069] Alternatively, if Figure 4 As shown, the second bracket 412 is provided with a limiting groove 4121 extending along its axial direction (that is, the second direction Y), and the limiting groove 4121 extends along the second direction Y. The clamping member 440 is provided with a protrusion 4401 on the side facing the second bracket 412, and the protrusion 4401 is slidably connected in the limiting groove 4121.

[0070] In the embodiment of the present application, by setting the limiting groove 4121 on the second bracket 412, the protrusion 4401 on the clamping member 440 is slidably connected in the limiting groove 4121, and the limiting groove 4121 can limit the protrusion 4401, thereby limiting the clamping member 440 from rotating around the second bracket 412 during use. At the same time, the protrusion 4401 can move in the limiting groove 4121 along the second direction Y, so as to facilitate the adjustment of the position of the scraper plate 430 along the second direction Y.

[0071] It can be understood that the clamping member 440 is clamped to the outer side of the second bracket 412. During the scraping operation of the scraper plate 430, the clamping member 440 may rotate around the second bracket 412. For this reason, in the embodiment of the present application, a limiting groove 4121 is provided in the second bracket 412, and a protrusion 4401 is provided in the clamping member 440. By utilizing the cooperation between the protrusion 4401 and the limiting groove 4121, the clamping member 440 can be prevented from rotating relative to the second bracket 412, thereby improving the overall structural stability of the scraper assembly 400.

[0072] It is understandable that the size and setting position of the limiting groove 4121 in the second bracket 412 can be flexibly set according to actual needs, and the embodiment of the present application does not limit this.

[0073] Alternatively, if Figure 2 As shown, a slide rail 110 and a slider 120 are provided on the base plate 100 . The slide rail 110 extends along a first direction X. The slider 120 is slidably connected to the slide rail 110 . The first bracket 411 is fixedly connected to the slider 120 .

[0074] In an embodiment of the present application, slide rails 110 are respectively arranged on both sides of the silk-screen screen 300 along the second direction Y on the base plate 100, and a slider 120 is slidably connected to the slide rails 110. The first bracket 411 is fixed on the slider 120 so that the scraper assembly 400 can be pushed to move along the slide rails 110 as a whole, thereby realizing the scraping operation of the scraper plate 430.

[0075] Alternatively, if Figure 5 and Figure 6 As shown, a suction structure 130 is provided in the operating surface 100 a , and the suction structure 130 is in contact with the fixing plate 200 , and is used to suction and fix the fixing plate 200 on the operating surface 100 a .

[0076] In the embodiment of the present application, an adsorption structure 130 is provided in the operating surface 100a of the base plate 100 so that the fixing plate 200 can be adsorbed and fixed on the operating surface 100a by the adsorption structure 130, thereby avoiding a large displacement of the fixing plate 200 during the printing process. The fixing plate 200 is fixed by the adsorption structure 130, and the structure is simple and easy to operate.

[0077] In some embodiments, the adsorption structure 130 can be configured as a vacuum adsorption disk or a vacuum adsorption hole structure, etc., so as to utilize negative pressure adsorption to adsorb and fix the fixing plate 200 on the operating surface 100a. Of course, the specific structure of the adsorption structure 130 can be flexibly selected according to actual needs, and the embodiments of the present application do not limit this.

[0078] Alternatively, if Figure 5 and Figure 6 As shown, the adsorption structure 130 includes a plurality of adsorption holes 1301 arranged in the operating surface 100a, and a vacuum chamber 1302 arranged inside the bottom plate 100, the plurality of adsorption holes 1301 are respectively connected to the vacuum chamber 1302, the vacuum chamber 1302 is suitable for being connected to a negative pressure mechanism, and the negative pressure mechanism provides negative pressure to the plurality of adsorption holes 1301 through the vacuum chamber 1302 to adsorb and fix the fixed plate 200.

[0079] In the embodiment of the present application, by setting a plurality of adsorption holes 1301 in the operation surface 100a of the bottom plate 100, and setting a vacuum chamber 1302 inside the bottom plate 100, the negative pressure mechanism provides negative pressure to the plurality of adsorption holes 1301 through the vacuum chamber 1302, so as to use the plurality of adsorption holes 1301 to adsorb and fix the fixed plate 200 on the operation surface 100a. In addition, by simultaneously providing negative pressure to the plurality of adsorption holes 1301 through the vacuum chamber 1302, it is ensured that the adsorption strength of each adsorption hole 1301 is the same or similar, so that different positions of the fixed plate 200 can be subjected to balanced force, and irregular deformation of the fixed plate 200 due to uneven force is avoided, thereby affecting the printing effect.

[0080] Specifically, Figure 5 As shown, the bottom plate 100 may include an upper bottom plate 101 and a lower bottom plate 102, the upper bottom plate 101 is mounted on the lower bottom plate 102, an operation surface 100a is provided on the side of the upper bottom plate 101 away from the lower bottom plate 102, and a plurality of adsorption holes 1301 arranged at intervals are provided in the operation surface 100a of the upper bottom plate 101. Accordingly, a vacuum cavity 1302 is provided in the lower bottom plate 102, the upper bottom plate 101 is sealed in the vacuum cavity 1302, and the plurality of adsorption holes 1301 are all connected to the vacuum cavity 1302.

[0081] Furthermore, a sealing ring is provided between the upper base plate 101 and the lower base plate 102 , and the sealing ring is provided around the four sides of the vacuum chamber 1302 to seal the interface between the upper base plate 101 and the lower base plate 102 , thereby improving the sealing performance of the vacuum chamber 1302 .

[0082] It is understandable that the base plate 100 may adopt a split structure or an integrated structure, and this embodiment of the present application does not limit this.

[0083] In some embodiments, the negative pressure mechanism may be a vacuum generating device, a vacuum pump or other device capable of forming a vacuum or negative pressure. The vacuum chamber 1302 is connected to the negative pressure mechanism through a pipeline to provide negative pressure into the vacuum chamber 1302 using the negative pressure mechanism.

[0084] Optionally, the bottom plate 100 is provided with a first step portion 140 (see Figure 5 ), the side of the screen printing plate 300 facing the bottom plate 100 is provided with a second step portion 310 (see Fig. 9 ), the second step portion 310 is positioned and matched with the first step portion 140.

[0085] In the embodiment of the present application, a first step portion 140 is provided around the operating surface 100a in the base plate 100, and a second step portion 310 is provided on the side of the silk screen screen 300 facing the base plate 100, so as to utilize the positioning cooperation between the second step portion 310 and the first step portion 140 to facilitate the precise installation and fixation of the silk screen screen 300 on the base plate 100.

[0086] In a specific application, threaded holes may be provided in the screen printing screen 300 and the base plate 100 respectively, and screws may be used to threadably connect with the threaded holes in the screen printing screen 300 and the threaded holes in the base plate 100 in turn, thereby fixing the screen printing screen 300 and the base plate 100.

[0087] It is understandable that after the screen printing screen 300 is installed on the bottom plate 100, there is a certain gap between the screen printing screen 300 and the fixed plate 200 to meet the printing requirements. In practical applications, the size of the gap between the screen printing screen 300 and the fixed plate 200 can be changed by designing the matching structure of the first step portion 140 and the second step portion 310. The specific structure of the first step portion 140 and the second step portion 310 can be flexibly set according to actual conditions, and the embodiment of the present application is not limited here.

[0088] Optionally, the fixed plate 200 includes a plate body 210, and extension portions 220 provided at both ends of the plate body 210 along the first direction X; the plate body 210 is placed on the operating surface 100a, the accommodating groove 200a is provided in the plate body 210, one end of the extension portion 220 is connected to the plate body 210, and the other end of the extension portion 220 extends outward from the operating surface 100a; scale lines 150 are provided on both sides of the bottom plate 100 along the first direction X.

[0089] In the embodiment of the present application, by respectively providing extensions 220 at both ends of the plate body 210, the plate body 210 can be moved by holding the extensions 220 during operation, thereby adjusting the matching position of the substrate and the screen printing screen. In addition, by respectively providing scale lines 150 on both sides of the bottom plate 100 along the first direction X, the positions of the extensions 220 at both ends of the plate body 210 can be evenly adjusted based on the scale lines 150, thereby achieving precise adjustment of the position of the substrate.

[0090] It is understandable that by providing scale lines 150 on both sides of the bottom plate 100 along the first direction X, when the hand-held extension part 220 adjusts the position of the plate body 210, the position adjustment of the two extension parts 220 can be ensured to be consistent, thereby improving the accuracy of the position adjustment.

[0091] In some embodiments, Figures 10 to 12 As shown, the assembly and use method of the screen printing device of the present application is as follows:

[0092] First, the upper base plate 101, the slide rail 110, and the slider 120 are sequentially installed on the lower base plate 102, and the first bracket 411 is fixed to the slider 120. Then, the fixing plate 200 is placed on the operating surface 100a of the base plate 100, and the screen printing screen 300 is installed and fixed to the upper base plate 101. Then, the second bracket 412 is connected to the first bracket 411, and the scraper plate 430 and the driving member 420 are installed, and then the clamping member 440 on the driving member 420 is clamped and fixed to the second bracket 412. In this process, the second bracket 412 can be rotated to adjust the matching angle between the scraper plate 430 and the screen printing screen 300, and the clamping position of the clamping member 440 and the second bracket 412 can be adjusted so that the scraper plate 430 is relatively located in the middle of the second bracket 412, that is, the position of the scraper plate 430 along the second direction Y is adjusted.

[0093] After the position and angle of the scraper plate 430 are adjusted, the fixing plate 200 is pulled out, the substrate to be printed is placed in the accommodating cavity of the fixing plate 200, and the fixing plate 200 is inserted back between the operation surface 100a and the screen printing screen 300, and then the two extensions 220 of the fixing plate 200 are held and adjusted to the scale line 150. After that, the negative pressure mechanism is used to provide negative pressure to the adsorption hole 1301 to adsorb and fix the fixing plate 200, and then the substrate is positioned, and the preparation of the substrate is completed.

[0094] Then, the support frame 410 is pushed to one side of the silk screen screen 300 along the first direction X, and the driving member 420 is used to drive the scraper plate 430 to contact the silk screen screen 300, and the magnitude of the force between the scraper plate 430 and the silk screen screen 300 is controlled. Since the scraper plate 430 is rotatably connected to the rotating shaft 4211 of the driving member 420 through the bearing 450, after the blade surface of the scraper plate 430 contacts the surface of the silk screen screen 300, it will automatically adhere to the surface of the silk screen screen 300. At this time, the preparation of the silk screen printing device can be completed.

[0095] Then, slurry is added to the screen printing screen 300, and the support frame 410 is pushed to slide on the slide rail 110 along the first direction X to drive the scraper plate 430 to scrape from one side of the screen printing screen 300 to the other side. During the movement of the scraper plate 430, the slurry can be scraped and squeezed, so that the slurry is printed on the substrate. According to the process requirements, the scraper plate 430 can be used for one or more scraping to improve the printing effect.

[0096] It is understandable that, with the screen printing device of the present application, the position adjustment of the scraper plate 430 is relatively convenient, which is convenient for manual printing operation. At the same time, the scraping process can be flexibly set according to actual needs to meet different printing requirements, which is also conducive to reducing the waste of slurry.

[0097] In addition, a plurality of accommodating grooves 200a may be provided in the fixed plate 200, and a substrate may be installed in each accommodating groove 200a. During the printing process, the fixed plate 200 may be moved so that part of the substrate is located in the middle of the screen printing screen 300, and then the printing operation is performed on the part of the substrate first. Then, the fixed plate 200 is moved to move the remaining substrates to the middle of the screen printing screen 300, and the printing operation is performed again. In this way, it can be ensured that the substrate can be located in the middle of the screen printing screen 300 during each printing operation, thereby ensuring the printing effect of the substrate.

[0098] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0099] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A screen printing device, characterized in that: include: A bottom plate, wherein the bottom plate is provided with an operating surface; A silk screen screen, the silk screen screen is connected to the bottom plate, and the silk screen screen covers the operation surface; The scraper assembly includes a support frame, a driving member and a scraper plate, wherein the support frame is slidably connected to the base plate, the driving member is installed on the support frame, and the scraper plate is rotatably connected to the output end of the driving member, and the driving member is used to drive the scraper plate to approach or move away from the screen printing screen.

2. The screen printing device according to claim 1, characterized in that: The support frame includes: a first bracket and a second bracket; the first bracket is slidably connected to the base plate, an end of the first bracket away from the base plate is provided with a clamping portion, the end of the second bracket is clamped to the clamping portion, and the driving member is installed on the second bracket.

3. The screen printing device according to claim 2, characterized in that: The scraper assembly also includes a clamping member, which is fixedly connected to the driving member and clamped to the second bracket.

4. The screen printing device according to claim 3, characterized in that: The second bracket is provided with a limiting groove extending along the axial direction thereof, and the clamping member is provided with a protrusion on one side facing the second bracket, and the protrusion is slidably connected in the limiting groove.

5. The screen printing device according to claim 2, characterized in that: The bottom plate is provided with a slide rail and a slider, the slider is slidably connected to the slide rail, and the first bracket is fixedly connected to the slider.

6. The screen printing device according to claim 1, characterized in that: The scraper assembly also includes a bearing. A mounting hole is provided in the scraper plate. The bearing is arranged in the mounting hole. A rotating shaft is provided on the output end. The rotating shaft is rotatably connected to the bearing.

7. The screen printing device according to claim 1, characterized in that: It also includes a fixing plate, which is placed between the operating surface and the screen printing screen. The fixing plate is provided with at least one accommodating groove, and the accommodating groove is used to place the substrate to be printed; and the edge of the bottom plate is provided with scale lines.

8. The screen printing device according to claim 7, characterized in that: The operating surface is provided with an adsorption structure, and the adsorption structure is in contact with the fixing plate; The adsorption structure includes a plurality of adsorption holes arranged in the operating surface, and a vacuum chamber arranged inside the bottom plate, wherein the plurality of adsorption holes are respectively connected to the vacuum chamber, and the vacuum chamber is suitable for being connected to a negative pressure mechanism, and the negative pressure mechanism provides negative pressure to the plurality of adsorption holes through the vacuum chamber to adsorb and fix the fixed plate.

9. The screen printing device according to claim 7, characterized in that: The fixing plate includes a plate body and extension parts arranged at both ends of the plate body; the plate body is placed between the operating surface and the silk screen screen, the accommodating groove is arranged in the plate body, one end of the extension part is connected to the plate body, and the other end of the extension part extends outward from the operating surface.

10. The screen printing device according to any one of claims 1 to 9, characterized in that: A first step portion is provided in the bottom plate around the operating surface, and a second step portion is provided on a side of the silk-screen screen facing the bottom plate, and the second step portion is positioned and matched with the first step portion.

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