Full-automatic silk screen flat plate printing machine and overprinting precision improving method thereof

Abstract

The invention discloses a full-automatic silk screen flat-plate printing machine and an overprinting precision and improving method thereof. A screen frame arranged on a rack is connected with the rack through an up-down micro-motion assembly, and the screen frame is detachably connected with the up-down micro-motion assembly; a visual inspection camera for positioning a printing stock is mounted on the rack, and an air suction platform is arranged below the screen frame; the device is simple and convenient to operate, automatic parallel feeding and positioning, automatic parallel overprinting, automatic parallel moving-out, automatic incoming material detection and alignment and automatic separation of finished products and semi-finished products can be achieved at the same time, a proper detachable screen frame is selected according to the size of a printing stock, the situation that the printing stock is small but the screen frame is large is avoided, and the production efficiency is improved. Waste of raw materials is effectively avoided; the screen frame and the air suction platform adopt up-and-down micro-motion printing, so that the printing precision is greatly enhanced; the paper, such as corrugated paper, paperboards and cartons, can be conveyed in parallel through up-down micro movement of the air suction platform, and the application range of traditional roll printing is greatly changed.

Description

Technical Field

[0001] The present invention relates to the technical field of printing machines, and in particular to a fully automatic screen flatbed printing machine and a method for improving the overprinting accuracy thereof. Background Art

[0002] Screen printing machine is a machine that prints with screen printing plates, which is a type of printing machine. Screen printing machine is a machine that prints text and images, and is a general term for machines or equipment used to produce printed products. Screen flatbed printing machine is a more representative printing equipment among flexographic printing machines, which can be divided into flat screen printing machine, curved screen printing machine, rotary screen printing machine, etc., while the existing automatic roller screen printing machine has limitations on the processed products when used. It is urgent to develop a flatbed screen printing machine to greatly improve the scope of application, such as corrugated paper, cardboard, cartons, film cold stamping, etc.

[0003] At present, when the roller screen printing machine is in printing operation, when the substrate is small and the screen frame is large, it will cause waste of raw materials. Summary of the invention

[0004] The present invention provides a fully automatic flat-bed screen printing machine and a method for improving overprinting accuracy thereof, so as to solve the problems raised in the background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A fully automatic screen flatbed printer comprises a frame, a screen frame is arranged on the frame, the screen frame is connected to the frame via an upper and lower micro-motion assembly, the upper and lower micro-motion assembly is used to control the upper and lower micro-motion of the screen frame, and the screen frame and the upper and lower micro-motion assembly are detachably connected;

[0007] A visual inspection camera is installed on the frame, the visual inspection camera is located at the front side of the screen frame, and the visual inspection camera is used to position and align the substrate during automatic feeding;

[0008] A suction platform is arranged below the net frame, and the suction platform is connected to the frame through an upper and lower micro-motion component, and the upper and lower micro-motion component is used to control the upper and lower micro-motion of the suction platform, and one side of the suction platform is rotatably connected to the upper and lower micro-motion component.

[0009] Preferably, the frame is provided with two groups of symmetrical main wall panels, each group of the main wall panels is provided with square holes, and the two groups of square holes are symmetrical, which are used to install the screen frame and adjust the scraper, which is convenient and quick;

[0010] A gas spring is arranged between the suction platform and the frame, and the gas spring, the suction platform and the frame form a triangle. The downward turning of the suction platform is convenient for making up the plate, pulling the plate position and wiping the plate during production, avoiding the second alignment caused by disassembling the screen frame.

[0011] Preferably, a paper feed assembly is provided on one side of the air suction platform, and the paper feed assembly is used to control the entry of paper;

[0012] A paper discharge assembly is arranged on the other side of the suction platform, and the paper discharge assembly is used to control the discharge of printed paper.

[0013] Preferably, the upper and lower micro-motion components adopt a cam structure;

[0014] A scraper is arranged above the screen frame and connected to the frame via a linear motor. The linear motor can make the scraper move back and forth in the moving direction of the substrate, and the linear motor can move in the vertical direction on the frame when stopped.

[0015] Preferably, the screen frame is detachably connected to the upper and lower micro-motion components through a disassembly assembly component, the disassembly assembly component includes a replacement plate, the replacement plate is fixedly connected to the upper and lower micro-motion components, a positioning rod is slidably inserted in the replacement plate, a positioning groove is provided on the positioning rod, the positioning groove includes two abutment platforms, the two abutment platforms are connected by an inclined plane, the positioning groove is rollingly connected to a positioning ball, and the positioning ball is rollingly connected to the replacement plate;

[0016] The replacement plate is provided with a hole for accommodating the insertion of a fixing rod, and the fixing rod is provided with a groove adapted to the locking ball;

[0017] The fixing rod is fixedly connected to the second connecting plate, the second connecting plate is fixedly connected to the net frame, and the net frame is used to fix the net frame;

[0018] The fixing rod is fixedly connected to the first connecting plate, the first connecting plate is located on the outside of the replacement plate, a rotating frame is arranged on the first connecting plate, one end of the rotating rod is rotatably connected to the rotating frame, the other end of the rotating rod is fixedly connected to the first bending member, the first bending member is rotatably connected to the second bending member, a triangular plate is fixedly connected to the side wall of the second bending member, the triangular plate is rotatably connected to a supporting rotating rod, the supporting rotating rod is fixedly connected to the supporting member, and the supporting member is fixedly connected to the outer surface of the replacement plate;

[0019] A replacement handle is fixedly connected to the second bending member.

[0020] Preferably, the first bending member is fixedly connected to a first placement frame, the first placement frame is provided with a second axial hole, a camshaft is fixedly connected in the second axial hole, a rotating sleeve is rotatably connected to the camshaft, the rotating sleeve is provided with a first axial hole, and the camshaft is rotatably inserted in the first axial hole;

[0021] A bearing is provided between the first shaft hole and the camshaft;

[0022] The rotating sleeve is provided with a support hole, a support block is slidably connected in the support hole, an abutment block is fixedly connected to one end of the support block, and the abutment block abuts against the camshaft;

[0023] The camshaft is provided with a cam, one side of the cam is a groove, and both the cam and the groove can abut against the abutment block.

[0024] The other end of the support block is fixedly connected with a follower rod, the follower rod is slidably inserted into the support tube, the support tube is fixedly connected to the second placement frame, and the second placement frame is arranged on the second bending member;

[0025] A third spring is arranged outside the support tube, and two ends of the third spring are respectively connected to the second placement frame and the support block.

[0026] Preferably, one end of the follower rod located in the support tube is fixedly connected to a follower plate, a sealing sleeve is fixedly connected to the tube opening of the support tube, a first spring is arranged between the sealing sleeve and the support block, and the first spring is sleeved outside the follower rod;

[0027] A second spring is arranged in the support tube, and the second spring is located between the inner wall of the support tube and the follower plate.

[0028] Preferably, a voltage stabilizing assembly is provided between the net frame and the upper and lower micro-motion assemblies, and the voltage stabilizing assembly includes a first mounting platform and a second mounting platform, the first mounting platform is fixedly connected to the upper and lower micro-motion assemblies, the second mounting platform is fixedly connected to the net frame, a central sleeve is provided between the first mounting platform and the second mounting platform, a first inner shrinkage tube and a second inner shrinkage tube are slidably connected in the central sleeve, the first inner shrinkage tube is fixedly connected to the second mounting platform, and the second inner shrinkage tube is fixedly connected to the first mounting platform;

[0029] The first mounting platform and the second mounting platform are both rotatably connected with a plurality of sets of rotating rod frames, and the rotating rod frames located on different mounting platforms are rotatably connected with each other;

[0030] An elastic telescopic sleeve is rotatably connected to the mutual connection of the rotating rod frame, an elastic telescopic rod is inserted in the elastic telescopic sleeve, and the elastic telescopic rod is fixedly connected to the middle sleeve.

[0031] Preferably, a transfer groove is provided on the rotating rod frame, a transfer block is rotatably connected in the transfer groove, a sliding rod is slidably inserted on the transfer block, the sliding rod is fixedly connected to the sliding table, the sliding table is slidably connected to the outer surface of the elastic telescopic sleeve, a fourth spring is provided between the sliding table and the transfer block, the fourth spring is sleeved on the outside of the sliding rod, and both ends of the fourth spring are respectively connected to the sliding table and the transfer block.

[0032] A method for improving the overprint accuracy of a fully automatic screen flatbed printer, used to improve the overprint accuracy of the fully automatic screen flatbed printer;

[0033] The following steps are involved:

[0034] S1: The visual inspection camera locates and aligns the substrate and distinguishes the finished products;

[0035] S2: The substrate moves to the top of the suction platform, and the suction platform absorbs the paper. Then, the suction platform drives the substrate to move up, and the screen frame moves down. The scraper scrapes the screen frame according to the size of the screen frame to complete the printing.

[0036] S3: The suction platform drives the substrate to move down, the screen frame to move up, and the paper is removed.

[0037] Compared with the prior art, the present invention has at least the following beneficial effects:

[0038] The present application sets a detachable screen frame, and can select a suitable screen frame according to the size of the substrate during printing, so as to avoid the situation where the substrate is small and the screen frame is large, thereby effectively avoiding the waste of raw materials, and making it easier and faster to adjust the machine during production;

[0039] During printing, compared with the traditional situation where the back-and-forth movement of the screen frame causes large deformation, the screen frame and the air suction platform of the present application improve the printing method and adopt up-and-down micro-motion printing, which greatly enhances the printing accuracy;

[0040] Traditional roller screen printing machines have limitations on substrates, while screen flatbed printing machines are more widely applicable, improve printing efficiency, and are more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of the screen frame position structure of the present invention;

[0042] Figure 2 It is a schematic diagram of the position structure of the air suction platform of the present invention;

[0043] Figure 3 It is a schematic diagram of the scraper connection structure of the present invention;

[0044] Figure 4 It is a schematic diagram of the partial structure of the disassembly and assembly components of the present invention;

[0045] Figure 5 It is a schematic diagram of the structure of the disassembly assembly of the present invention in a released state;

[0046] Figure 6 It is a schematic diagram of the structure of the fastened state of the disassembly and assembly components of the present invention;

[0047] Figure 7It is a schematic diagram of the bending part structure of the disassembly assembly of the present invention;

[0048] Figure 8 It is a schematic diagram of the camshaft structure of the disassembly and assembly assembly of the present invention;

[0049] Fig. 9 It is a schematic diagram of the planar structure of the voltage stabilizing component of the present invention;

[0050] Fig.10 It is a schematic diagram of the local structure of the voltage stabilizing component of the present invention.

[0051] In the figure: 1, main wall panel; 2, screen frame; 3, square hole window; 4, air suction platform; 5, paper feed assembly; 6, paper discharge assembly; 7, replacement plate; 8, fixing rod; 9, positioning rod; 10, positioning slot; 11, positioning ball; 12, first connecting plate; 13, rotating frame; 14, rotating rod; 15, first bending member; 16, second bending member; 17, replacement handle; 18, triangle plate; 19, supporting rotating rod; 20, supporting member; 21, balancing rod; 22, second connecting plate; 23, screen frame; 24, first placement frame; 25, second placement frame; 26, cam shaft; 27, rotating sleeve; 28, first shaft hole; 29, bearing; 30 , fastening bolt; 31, second axial hole; 32, supporting hole; 33, abutment block; 34, supporting block; 35, follower rod; 36, first spring; 37, sealing sleeve; 38, follower plate; 39, second spring; 40, supporting tube; 41, third spring; 42, cam; 43, groove; 44, first mounting platform; 45, second mounting platform; 46, center sleeve; 47, first retractable tube; 48, second retractable tube; 49, rotating rod frame; 50, elastic telescopic sleeve; 51, elastic telescopic rod; 52, sliding platform; 53, adapter groove; 54, adapter block; 55, slide rod; 56, fourth spring; 57, scraper; 58, linear motor. DETAILED DESCRIPTION

[0052] In the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish the protective components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0053] Example 1

[0054] See also Figure 1-Figure 3 , an embodiment of the present invention: a fully automatic screen flatbed printer, comprising a frame, a screen frame 2 is arranged on the frame, the screen frame 2 is connected to the frame through an upper and lower micro-motion component, the upper and lower micro-motion component is used to control the upper and lower micro-motion of the screen frame 2, and the screen frame 2 is detachably connected to the upper and lower micro-motion component;

[0055] A visual inspection camera is installed on the frame, and the visual inspection camera is located on the front side of the screen frame 2. The visual inspection camera is used to position and align the substrate during automatic feeding. The incoming pattern, text shrinkage and paper deformation can be automatically inspected during automatic operation, which greatly improves production efficiency.

[0056] A suction platform 4 is provided below the net frame 2, and the suction platform 4 is connected to the frame via an upper and lower micro-motion assembly, and the upper and lower micro-motion assembly is used to control the upper and lower micro-motion of the suction platform 4, and one side of the suction platform 4 is rotatably connected to the upper and lower micro-motion assembly.

[0057] The frame is provided with two groups of symmetrical main wall panels 1, each group of the main wall panels 1 is provided with a square hole window 3, and the two groups of the square hole windows 3 are symmetrical and are used to install the screen frame and adjust the scraper, which is convenient and quick;

[0058] A gas spring is arranged between the suction platform 4 and the frame, and the gas spring, the suction platform 4 and the frame form a triangle. The downward flipping of the suction platform is convenient for making up the plate, pulling the plate position and wiping the plate during production, avoiding the second alignment caused by disassembling the screen frame;

[0059] A paper feeding assembly 5 is provided on one side of the air suction platform 4, and the paper feeding assembly 5 is used to control the entry of paper;

[0060] A paper discharge assembly 6 is disposed on the other side of the suction platform 4, and the paper discharge assembly 6 is used to control the discharge of printed paper.

[0061] The upper and lower micro-motion components adopt a cam structure;

[0062] A scraper 57 is arranged above the screen frame 2, and the scraper 57 is connected to the frame via a linear motor 58. The linear motor 58 can make the scraper 57 move back and forth in the moving direction of the substrate (moving back and forth in the screen frame 2), and the linear motor 58 can move in the vertical direction on the frame when the machine is stopped;

[0063] The linear motor 58 drives the scraper 58 to move and the stroke can be set according to the size of the substrate;

[0064] Among them, the printing substrate can be produced and the paper feeding specifications are as follows: the minimum is 360×260mm and the maximum is 1650×1200mm.

[0065] A method for improving the overprint accuracy of a fully automatic screen flatbed printer, which is used to improve the overprint accuracy of the fully automatic screen flatbed printer and has a wide range of applications;

[0066] The following steps are involved:

[0067] S1: The visual inspection camera locates, aligns and distinguishes the finished products produced by the substrate;

[0068] S2: The substrate moves to the top of the suction platform 4, and the suction platform 4 absorbs the paper. Then, the suction platform 4 drives the substrate to move up, and the screen frame 2 moves down. The scraper scrapes the screen frame 2 according to the size of the screen frame 2 to complete the printing;

[0069] S3: The suction platform 4 drives the substrate to move downward, the screen frame 2 moves upward, and the paper is removed;

[0070] Among them, grabbing, printing and placing are completed at the same time, the operation is simple and convenient, and it can automatically parallel feed positioning, automatic parallel overprinting, automatic parallel removal, automatic incoming material detection and automatic separation of finished products and semi-finished products. The above four actions can be completed at the same time, which can greatly improve production efficiency.

[0071] The working principle and beneficial effects of the above scheme:

[0072] The present application provides a detachable screen frame 2, and during printing operations, a suitable screen frame can be selected according to the size of the substrate, thereby avoiding the situation where the substrate is small and the screen frame is large, thereby effectively avoiding the waste of raw materials;

[0073] During printing, compared with the traditional situation where the screen frame moves back and forth and causes large deformation, the screen frame 2 and the air suction platform 4 of the present application improve the printing method, adopt up and down micro-movement printing, greatly enhance the printing accuracy, and the air suction platform 4 is connected with the screen, so that the screen is well protected from stretching deformation and can be reused, saving the number of exposure times;

[0074] Traditional roller screen printing can only roll, while the screen flatbed printer can move up and down slightly, which increases the scope of application and improves printing efficiency. Since roller printing cannot print hard paper and is limited to soft paper, the screen flatbed printer of this application can be used for corrugated paper, cardboard, cartons, flat sheets of paper, and film cold stamping;

[0075] The traditional roller printing screen frame, which moves back and forth with the paper, causes large stretching deformation. The stroke of the scraper 57 of the present application is automatically adjusted, and the reasonable matching is made according to the size of the substrate to save costs, greatly enhancing the accuracy and scope of use of printing;

[0076] The paper feed assembly 5 and the paper output assembly 6 of the present application are automatically connected with the printing machine, and the three positionings are completed at the same time, which greatly improves the efficiency of printing;

[0077] The square hole window 3 on the frame is arranged above the screen frame 2, which is convenient for loading and unloading the screen frame 2 and operating the scraper 57;

[0078] Through the design that one side of the suction platform 4 rotates and the other side opens and closes, the suction platform 4 can be turned downward to expose the screen frame 2 above the suction platform 4, which is convenient for timely handling of oil leakage repair and screen pulling during the production process without disassembling the screen frame 2, ensuring the accuracy and efficiency of printing. (Disassembling and assembling the screen frame 2 requires repeated positioning, which affects accuracy and efficiency);

[0079] The visual inspection camera is installed to position, align and distinguish the finished products of the screen frame 2 relative to the substrate, avoiding shutdown for alignment and improving efficiency. Through intelligent visual inspection of incoming materials, images, text, shrinkage, paper deformation, finished products, semi-finished products and paper are automatically processed and sorted, saving manpower and avoiding the occurrence of mixed materials.

[0080] Example 2

[0081] See also Figure 4-Figure 8 On the basis of Example 1, the screen frame 2 is detachably connected to the upper and lower micro-motion components through a disassembly assembly component, the disassembly assembly component includes a replacement plate 7, the replacement plate 7 is fixedly connected to the upper and lower micro-motion components, a positioning rod 9 is slidably inserted in the replacement plate 7, and a positioning groove 10 is provided on the positioning rod 9, the positioning groove 10 includes two abutment platforms, the two abutment platforms are connected by an inclined plane, the positioning groove 10 is rollingly connected to the positioning ball 11, and the positioning ball 11 is rollingly connected to the replacement plate 7;

[0082] The replacement plate 7 is provided with a hole for accommodating the insertion of the fixing rod 8, and the fixing rod 8 is provided with a groove adapted to the locking ball 11;

[0083] The fixing rod 8 is fixedly connected to the second connecting plate 22 , and the second connecting plate 22 is fixedly connected to the net frame 23 . The net frame 23 is used to fix the net frame 2 .

[0084] The fixing rod 8 is fixedly connected to the first connecting plate 12, the first connecting plate 12 is located on the outside of the replacement plate 7, a rotating frame 13 is provided on the first connecting plate 12, one end of a rotating rod 14 is rotatably connected to the rotating frame 13, the other end of the rotating rod 14 is fixedly connected to a first bending member 15, the first bending member 15 is rotatably connected to the second bending member 16, the side wall of the second bending member 16 is fixedly connected to a triangular plate 18, the triangular plate 18 is rotatably connected to a supporting rotating rod 19, the supporting rotating rod 19 is fixedly connected to a supporting member 20, and the supporting member 20 is fixedly connected to the outer surface of the replacement plate 7;

[0085] A replacement handle 17 is fixedly connected to the second bending member 16 .

[0086] The first bending member 15 is fixedly connected to a first placement frame 24, the first placement frame 24 is provided with a second shaft hole 31, a cam shaft 26 is fixedly connected in the second shaft hole 31, a rotating sleeve 27 is rotatably connected to the cam shaft 26, the rotating sleeve 27 is provided with a first shaft hole 28, and the cam shaft 26 is rotatably inserted in the first shaft hole 28;

[0087] A bearing 29 is provided between the first shaft hole 28 and the camshaft 26;

[0088] The rotating sleeve 27 is provided with a support hole 32, a support block 34 is slidably connected in the support hole 32, an abutment block 33 is fixedly connected to one end of the support block 34, and the abutment block 33 abuts against the camshaft 26;

[0089] The camshaft 26 is provided with a cam 42 , and one side of the cam 42 is a groove 43 . Both the cam 42 and the groove 43 can abut against the abutment block 33 .

[0090] The other end of the support block 34 is fixedly connected with a follower rod 35, and the follower rod 35 is slidably inserted into the support tube 40, and the support tube 40 is fixedly connected to the second placement frame 25, and the second placement frame 25 is arranged on the second bending member 16;

[0091] A third spring 41 is disposed outside the support tube 40 , and two ends of the third spring 41 are connected to the second placement frame 25 and the support block 34 respectively.

[0092] One end of the follower rod 35 located in the support tube 40 is fixedly connected to a follower plate 38, and a sealing sleeve 37 is fixedly connected to the tube mouth of the support tube 40. A first spring 36 is arranged between the sealing sleeve 37 and the support block 34, and the first spring 36 is sleeved outside the follower rod 35;

[0093] A second spring 39 is disposed in the support tube 40 , and the second spring 39 is located between the inner wall of the support tube 40 and the follower plate 38 .

[0094] The working principle and beneficial effects of the above scheme:

[0095] When installing a new screen frame 2, the replacement handle 17 is moved to be parallel to the replacement plate 7. At this time, the locking rod 9 goes deep into the replacement plate 7, and the deeper abutment platform of the locking groove 10 on the locking rod 9 is located at the locking ball 11. The locking ball 11 moves (the locking ball 11 can be moved by elastic components such as springs) to the abutment platform, and the screen frame 2 is installed. The fixing rod 8 is inserted between the two sets of locking rods 9, and the replacement handle 17 is moved to rotate the second bending member 16 and the triangular plate 18, which drives the rotating frame 13 to move outward, and the locking The shallower abutment platform of the positioning groove 10 on the rod 9 is located at the positioning ball 11, and the positioning ball 11 is squeezed so that the positioning ball 11 is clamped in the groove on the fixing rod 8 to fix the screen frame 2. At this time, the connection point of the first bending member 15 and the second bending member 16, the connection point of the triangular plate 18 and the supporting rotating rod 19, and the connection point of the rotating frame 13 and the rotating rod 14 are located on the same straight line. When an external force acts on the screen frame 2, it will not cause the deflection of the replacement handle 17, nor will it cause the positioning rod 9 to move, thereby preventing the screen frame 2 from falling off;

[0096] After the installation of the screen frame 2 is completed, the replacement handle 17 is restored to a vertical state with the positioning rod 9, that is, the first bending member 15 and the second bending member 16 are in a bent state, and the abutment block 33 is located in the groove 43. Since the height of the groove 43 is lower than the cam 42, the screen frame 2 can be effectively prevented from falling off due to external force.

[0097] The arrangement of the first spring 36, the second spring 39, and the third spring 41 also makes it necessary to have a certain amount of force to move the replacement handle 17, rather than being able to move it at will. The state of the replacement handle 17 can be changed only by overcoming the elastic force of the first spring 36, the second spring 39, and the third spring 41, which helps to avoid the falling off of the screen frame 2 caused by misoperation.

[0098] Through the above structure, the screen frame 2 can be firmly fixed, and the screen frame 2 can be disassembled by changing the state of the replacement handle 17, which is convenient and quick. By replacing the screen frame 2, the size of the substrate can be better matched to avoid the situation where the substrate is small and the screen frame is large, thereby effectively avoiding the waste of raw materials.

[0099] Example 3

[0100] See also Fig. 9 , Fig.10On the basis of Embodiment 1-2, a voltage stabilizing component is provided between the screen frame 2 and the upper and lower micro-motion components, and the voltage stabilizing component includes a first mounting platform 44 and a second mounting platform 45. The first mounting platform 44 is fixedly connected to the upper and lower micro-motion components, and the second mounting platform 45 is fixedly connected to the screen frame 2. A central sleeve 46 is provided between the first mounting platform 44 and the second mounting platform 45. A first inner shrinkage tube 47 and a second inner shrinkage tube 48 are slidably connected in the central sleeve 46. The first inner shrinkage tube 47 is fixedly connected to the second mounting platform 45, and the second inner shrinkage tube 48 is fixedly connected to the first mounting platform 44;

[0101] The first mounting platform 44 and the second mounting platform 45 are both rotatably connected to a plurality of rotating rod frames 49, and the rotating rod frames 49 on different mounting platforms are rotatably connected to each other;

[0102] An elastic telescopic sleeve 50 is rotatably connected to the mutual connection of the rotating rod frame 49 , and an elastic telescopic rod 51 is inserted into the elastic telescopic sleeve 50 . The elastic telescopic rod 51 is fixedly connected to the middle sleeve 46 .

[0103] The rotating rod frame 49 is provided with an adapter groove 53, and an adapter block 54 is rotatably connected in the adapter groove 53. A sliding rod 55 is slidably inserted on the adapter block 54. The sliding rod 55 is fixedly connected to the sliding platform 52, and the sliding platform 52 is slidably connected to the outer surface of the elastic telescopic sleeve 50. A fourth spring 56 is provided between the sliding platform 52 and the adapter block 54. The fourth spring 56 is sleeved on the outside of the sliding rod 55, and the two ends of the fourth spring 56 are respectively connected to the sliding platform 52 and the adapter block 54.

[0104] The working principle and beneficial effects of the above scheme:

[0105] Excessive up and down micro-movement of the screen frame 2 and the air suction platform 4 may cause the paper to be crushed, while insufficient up and down micro-movement of the screen frame 2 and the air suction platform 4 may cause unclear printing. In order to avoid the above problems, a retractable first mounting platform 44, a second mounting platform 45, a middle sleeve 46, a first inner shrinkage tube 47, and a second inner shrinkage tube 48 are provided. During printing, when the up and down micro-movement of the screen frame 2 and the air suction platform 4 is excessive, the shrinkage between the first mounting platform 44 and the second mounting platform 45 increases, and when the up and down micro-movement of the screen frame 2 and the air suction platform 4 is insufficient, the maximum extension is maintained between the first mounting platform 44 and the second mounting platform 45. At this time, it is only necessary to set the interval of the up and down micro-movement of the screen frame 2 and the air suction platform 4 to be smaller than the maximum extension of the first mounting platform 44 and the second mounting platform 45, and larger than the maximum contraction of the first mounting platform 44 and the second mounting platform 45, so that the up and down micro-movement of the screen frame 2 and the air suction platform 4 becomes a range, which is convenient for control.

[0106] A plurality of rotating rod frames 49 are installed around the first mounting platform 44 and the second mounting platform 45. When compressed, each set of elastic telescopic sleeves 50 and elastic telescopic rods 51 are extended, and the fourth spring 56 is contracted, and pressure is applied to the paper, so that the paper is evenly stressed to ensure the printing effect.

[0107] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A fully automatic screen printing machine, characterized in that: It comprises a frame, on which a screen frame (2) is arranged, the screen frame (2) is connected to the frame via an up and down micro-motion assembly, the up and down micro-motion assembly is used to control the up and down micro-motion of the screen frame (2), and the screen frame (2) and the up and down micro-motion assembly are detachably connected; Two groups of symmetrical main wall panels (1) are arranged on the frame, each group of the main wall panels (1) is provided with a square hole window (3), and the two groups of the square hole windows (3) are symmetrical; An air suction platform (4) is arranged below the net frame (2); the air suction platform (4) is connected to the frame via an up and down micro-motion component; the up and down micro-motion component is used to control the up and down micro-motion of the air suction platform (4); one side of the air suction platform (4) is rotatably connected to the up and down micro-motion component.

2. The fully automatic screen printing machine according to claim 1, characterized in that: A visual inspection camera is installed on the frame, the visual inspection camera is located on the front side of the screen frame (2), and the visual inspection camera is used to position and align the substrate during automatic feeding; A gas spring is arranged between the air suction platform (4) and the frame, and the gas spring, the air suction platform (4) and the frame form a triangle.

3. The fully automatic screen printing machine according to claim 1, characterized in that: A paper feeding assembly (5) is provided on one side of the air suction platform (4), and the paper feeding assembly (5) is used to control the entry of paper; A paper discharge assembly (6) is provided on the other side of the suction platform (4), and the paper discharge assembly (6) is used to control the discharge of printed paper.

4. The fully automatic screen printing machine according to claim 1, characterized in that: The upper and lower micro-motion components adopt a cam structure; A scraper (57) is arranged above the screen frame (2), and the scraper is connected to the frame via a linear motor (58). The linear motor (58) can make the scraper (57) move back and forth in the direction of movement of the substrate, and the linear motor (58) can move in a vertical direction on the frame when the machine is stopped.

5. The fully automatic screen printing machine according to claim 1, characterized in that: The screen frame (2) is detachably connected to the upper and lower micro-motion components via a disassembly assembly component, the disassembly assembly component comprises a replacement plate (7), the replacement plate (7) is fixedly connected to the upper and lower micro-motion components, a positioning rod (9) is slidably inserted in the replacement plate (7), the positioning rod (9) is provided with a positioning groove (10), the positioning groove (10) comprises two abutment platforms, the two abutment platforms are connected via an inclined surface, the positioning groove (10) is rollingly connected to a positioning ball (11), and the positioning ball (11) is rollingly connected to the replacement plate (7); The replacement plate (7) is provided with a hole for accommodating the insertion of a fixing rod (8), and the fixing rod (8) is provided with a groove adapted to the locking ball (11); The fixing rod (8) is fixedly connected to the second connecting plate (22), the second connecting plate (22) is fixedly connected to the net frame (23), and the net frame (23) is used to fix the net frame (2); The fixing rod (8) is fixedly connected to the first connecting plate (12), the first connecting plate (12) is located on the outer side of the replacement plate (7), a rotating frame (13) is provided on the first connecting plate (12), one end of a rotating rod (14) is rotatably connected to the rotating frame (13), the other end of the rotating rod (14) is fixedly connected to a first bending member (15), the first bending member (15) is rotatably connected to the second bending member (16), the side wall of the second bending member (16) is fixedly connected to a triangular plate (18), the triangular plate (18) is rotatably connected to a supporting rotating rod (19), the supporting rotating rod (19) is fixedly connected to a supporting member (20), and the supporting member (20) is fixedly connected to the outer surface of the replacement plate (7); A replacement handle (17) is fixedly connected to the second bending piece (16).

6. The fully automatic screen printing machine according to claim 5, characterized in that: The first bending member (15) is fixedly connected to a first placement frame (24), the first placement frame (24) is provided with a second axial hole (31), a camshaft (26) is fixedly connected in the second axial hole (31), a rotating sleeve (27) is rotatably connected to the camshaft (26), the rotating sleeve (27) is provided with a first axial hole (28), and the camshaft (26) is rotatably inserted in the first axial hole (28); A bearing (29) is provided between the first shaft hole (28) and the camshaft (26); The rotating sleeve (27) is provided with a support hole (32), a support block (34) is slidably connected in the support hole (32), an abutment block (33) is fixedly connected to one end of the support block (34), and the abutment block (33) abuts against the camshaft (26); The camshaft (26) is provided with a cam (42), one side of the cam (42) is a groove (43), and both the cam (42) and the groove (43) can abut against the abutment block (33); The other end of the support block (34) is fixedly connected to a follower rod (35), the follower rod (35) is slidably inserted into a support tube (40), the support tube (40) is fixedly connected to a second placement frame (25), and the second placement frame (25) is arranged on a second bending member (16); A third spring (41) is arranged outside the support tube (40), and two ends of the third spring (41) are respectively connected to the second placement frame (25) and the support block (34).

7. The fully automatic screen printing machine according to claim 6, characterized in that: One end of the follower rod (35) located in the support tube (40) is fixedly connected to a follower plate (38); a sealing sleeve (37) is fixedly connected to the tube mouth of the support tube (40); a first spring (36) is arranged between the sealing sleeve (37) and the support block (34); and the first spring (36) is sleeved on the outside of the follower rod (35); A second spring (39) is arranged in the support tube (40), and the second spring (39) is located between the inner wall of the support tube (40) and the follower plate (38).

8. The fully automatic screen printing machine according to claim 1, characterized in that: A voltage stabilizing assembly is arranged between the screen frame (2) and the upper and lower micro-motion assemblies, and the voltage stabilizing assembly comprises a first mounting platform (44) and a second mounting platform (45), the first mounting platform (44) is fixedly connected to the upper and lower micro-motion assemblies, the second mounting platform (45) is fixedly connected to the screen frame (2), a central sleeve (46) is arranged between the first mounting platform (44) and the second mounting platform (45), a first inner shrinkage tube (47) and a second inner shrinkage tube (48) are slidably connected in the central sleeve (46), the first inner shrinkage tube (47) is fixedly connected to the second mounting platform (45), and the second inner shrinkage tube (48) is fixedly connected to the first mounting platform (44); The first mounting platform (44) and the second mounting platform (45) are both rotatably connected to a plurality of groups of rotating rod frames (49), and the rotating rod frames (49) located on different mounting platforms are rotatably connected to each other; The mutually connected parts of the rotating rod frames (49) are rotatably connected with an elastic telescopic sleeve (50), an elastic telescopic rod (51) is inserted into the elastic telescopic sleeve (50), and the elastic telescopic rod (51) is fixedly connected to the middle sleeve (46).

9. The fully automatic screen printing machine according to claim 8, characterized in that: The rotating rod frame (49) is provided with an adapter groove (53), an adapter block (54) is rotatably connected in the adapter groove (53), a sliding rod (55) is slidably inserted on the adapter block (54), the sliding rod (55) is fixedly connected to the sliding platform (52), the sliding platform (52) is slidably connected to the outer surface of the elastic telescopic sleeve (50), a fourth spring (56) is provided between the sliding platform (52) and the adapter block (54), the fourth spring (56) is sleeved on the outside of the sliding rod (55), and the two ends of the fourth spring (56) are respectively connected to the sliding platform (52) and the adapter block (54).

10. A method for improving the overprint accuracy of a fully automatic screen printing machine, characterized in that: Used to improve the overprint accuracy of a fully automatic screen printing machine as described in any one of claims 1 to 9; The following steps are involved: S1: The visual inspection camera locates and aligns the substrate and distinguishes the finished products; S2: the printing material moves to the top of the suction platform (4), the suction platform (4) absorbs the paper, then the suction platform (4) drives the printing material to move upward, the screen frame (2) moves downward, and the scraper scrapes the screen frame (2) according to the size of the screen frame (2), thereby completing printing; S3: The suction platform (4) drives the printing material to move downward, the screen frame (2) moves upward, and the paper is removed.

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