Flattening device for polaroid edge two-dimensional code jet printing

Abstract

The invention discloses a flattening device for polaroid edge two-dimensional code jet printing, and relates to the technical field of flattening devices. The device comprises a support, and two flattening mechanisms are arranged on one side of the support and symmetrically distributed up and down; each flattening mechanism comprises a symmetrical connecting rod and two flattening rollers located on the same horizontal plane, and roller shafts in the two flattening rollers are connected with the two ends of the symmetrical connecting rod correspondingly. Each flattening mechanism further comprises a horizontal driving mechanism and a vertical driving mechanism, the symmetrical connecting rods are connected with the moving end of the horizontal driving mechanism, and the horizontal driving mechanism is connected with the moving end of the vertical driving mechanism; the flattening mechanisms are arranged on the two sides of the two-dimensional code jet printing ink head, so that the flattening rollers can flatten the polaroid twice, the jet printing effect can be improved, it is guaranteed that the seal shape of the two-dimensional code is correct, the definition is higher, and subsequent reading of the two-dimensional code by other equipment is not affected.

Description

Technical Field

[0001] The present invention relates to the technical field of flattening devices, and in particular to a flattening device used for printing a two-dimensional code on the edge of a polarizing film. Background Art

[0002] The full name of polarizer is polarizing film. It is an essential optical component for LCD imaging. Polarizer changes the transmission direction of light through the polarization effect to achieve the purpose of display. For LCD screens, two polarizers must be tightly attached to both sides of the liquid crystal glass to achieve display imaging. Polarizers occupy an important position in LCD components.

[0003] The production process of polarizer includes the processes of alkalization pretreatment, stretching, coating, cutting of triacetyl cellulose film (TAC), and the automatic optical inspection (AOI) equipment is responsible for detecting various defects inside and outside the film in each process. Usually, the defects detected in the pretreatment and stretching stages are first printed with a QR code with defect location information on the white edge of the polarizer (TAC film edge), and then in the coating stage, the QR code is read and printed on the release film or protective film of the polarizer together with the defects detected in the coating stage.

[0004] During the QR code printing process, the edge of the polarizer may cause varying degrees of edge warping due to factors such as the production process. At this time, the edge film surface cannot be parallel to the printing ink head, and the film surface will contact the ink head, resulting in unclear shape of the printed QR code and even clogging of the ink head, which ultimately makes the QR code unreadable in the coating section, causing the defect information recorded in the front-end process within a certain range to be unable to be printed, that is, missed printing, causing losses to downstream products. Summary of the invention

[0005] The purpose of the present invention is to provide a flattening device for printing a two-dimensional code on the edge of a polarizer to solve the following technical problems: How to improve the clarity of the QR code stamp printed on the polarizing film surface? The purpose of the present invention can be achieved through the following technical solutions: A flattening device for printing a two-dimensional code on the edge of a polarizer comprises a bracket, one side of the bracket is provided with two sets of flattening mechanisms, the two sets of flattening mechanisms are symmetrically distributed up and down; each set of flattening mechanisms comprises a symmetrical connecting rod and two flattening rollers located on the same horizontal plane, each flattening roller comprises a roller shaft and an outer roller rotatably sleeved outside the roller shaft, wherein the roller shafts of the two flattening rollers are respectively connected to the two ends of the symmetrical connecting rod; Each set of flattening mechanisms further comprises a horizontal driving mechanism and a vertical driving mechanism, wherein the symmetrical connecting rod is connected to the moving end of the horizontal driving mechanism, and the horizontal driving mechanism is connected to the moving end of the vertical driving mechanism; The vertical driving mechanism is used to drive the horizontal driving mechanism to move up and down, and the horizontal driving mechanism is used to drive the symmetrical connecting rod to move forward and backward.

[0006] In a further embodiment of the present invention: the horizontal driving mechanism includes a motor, a screw and a threaded seat, one end of the screw is connected to the output end of the motor, the threaded seat is sleeved on the screw, and the internal thread of the threaded seat matches the external thread of the screw; the symmetrical connecting rod is connected to the threaded seat; the threaded seat is also connected to a guide mechanism for guiding the threaded seat.

[0007] In a further embodiment of the present invention: the symmetrical connecting rod includes two L-shaped support rods, one end of the two L-shaped support rods is respectively connected to the roller shafts in the two flattening rollers, and the other end is connected to the threaded seat, and the two L-shaped support rods are symmetrically arranged about the threaded seat.

[0008] In a further embodiment of the present invention, the guide mechanism comprises a guide rod arranged parallel to the screw rod, one end of the guide rod is connected to the bracket, and the threaded seat is slidably connected to the guide rod.

[0009] In a further embodiment of the present invention, the vertical driving mechanism includes a mounting groove provided on the bracket and an electric cylinder arranged at the bottom end of the mounting groove, and the movable end of the electric cylinder is connected to the motor.

[0010] In a further solution of the present invention: the flattening device is installed on one side of a polarizer conveying mechanism, and the polarizer conveying mechanism is used to drive the polarizer for conveying.

[0011] In a further embodiment of the present invention: the polarizer conveying mechanism includes three guide rollers, wherein the first and second guide rollers have the same horizontal height, so as to convey the polarizer in the horizontal direction; the third guide roller is arranged below the second guide roller, and the three guide rollers all have a driving force for synchronous rotation.

[0012] In a further solution of the present invention: a two-dimensional code inkjet printing head is arranged between the first and second guide rollers, and the injection port of the two-dimensional code inkjet printing head is located above the edge of the polarizer.

[0013] In a further embodiment of the present invention, the flattening device is disposed between the first and second guide rollers, and two sets of flattening mechanisms are respectively located on the upper and lower sides of the polarizer.

[0014] In a further solution of the present invention: the two flattening rollers in each set of flattening mechanisms are respectively located on both sides of the two-dimensional code printing ink head.

[0015] Beneficial effects of the present invention: The present invention arranges a flattening mechanism on both sides of the two-dimensional code inkjet printing head, so that the flattening roller can flatten the polarizer twice, wherein the first flattening is for the two-dimensional code inkjet printing head to prepare for printing a pattern in advance, and after the first flattening, the two-dimensional code inkjet printing head is used for printing. At this time, since the white edge of the polarizer is flatter after the initial flattening, the printed pattern is also more regular, which can avoid the phenomenon that the printed pattern does not fit the white edge of the polarizer or even cannot be printed due to the wrinkles of the white edge of the polarizer; The second flattening is performed after printing. On the one hand, it is to further flatten the white edge of the polarizer. On the other hand, it can also make the printed pattern pass through the rolling of the flattening roller so that its color is firm and evenly spread on the white edge of the polarizer. That is, when there are a few wrinkles in the printing area of ​​the white edge of the polarizer, the inside of the wrinkled part cannot be colored when the pattern is printed. Then the wrinkled part will be exposed after the white edge of the polarizer is flattened. At this time, the flattening roller brings the color around the wrinkled part to the wrinkled part, so that the white edge of the polarizer is still in a state of uniform color distribution after the white edge of the polarizer is flattened, thereby improving the printing effect, ensuring the correct shape of the QR code, and higher clarity, and will not affect the subsequent reading of it by other devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] Figure 1 It is a structural schematic diagram of a flattening device for printing a two-dimensional code on the edge of a polarizer according to an embodiment of the present invention; Figure 2 It is a top view of a flattening device for printing a two-dimensional code on the edge of a polarizer according to an embodiment of the present invention; Figure 3 It is a top view of the installation position of a flattening device for printing a two-dimensional code on the edge of a polarizer according to an embodiment of the present invention; Figure 4 It is a structural schematic diagram of the installation position of a flattening device for printing a two-dimensional code on the edge of a polarizer according to an embodiment of the present invention.

[0018] In the figure: 1. bracket; 2. outer roller; 3. roller shaft; 4. L-shaped support rod; 5. QR code printing ink head; 6. QR code printing ink head bracket; 7. motor; 8. polarizer; 9. mounting groove; 10. threaded seat; 11. flattening roller; 12. polarizer main film; 13. polarizer white edge; 14. screw; 16. guide roller. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1 As shown, the present invention is a flattening device for printing a two-dimensional code on the edge of a polarizer, comprising a bracket 1, which is a rectangular vertical plate with its bottom supported on the ground; two groups of vertical drive mechanisms corresponding to each other are installed on one side of the bracket 1, and the movable end of each group of vertical drive mechanisms is connected to a horizontal drive mechanism, and the vertical drive mechanism is used to drive the horizontal drive mechanism to move in the up and down directions, and the driving directions of the two groups of vertical drive mechanisms are opposite, so that the two groups of horizontal drive mechanisms are close to or away from each other in the up and down directions.

[0021] There is no restriction on the specific structure of the vertical driving mechanism, which only needs to meet the above driving requirements; for example, in an embodiment of the present invention, two mounting grooves 9 are opened on one side of the bracket 1, one of which is close to the upper end of the bracket 1, and the other is in the middle of the bracket 1, and the two mounting grooves 9 correspond to each other up and down; electric cylinders are respectively installed in the two mounting grooves 9, and the movable ends of the electric cylinders are connected to the horizontal driving mechanism; the corresponding mounting grooves 9 and the electric cylinders constitute the vertical driving mechanism in this embodiment; it should be noted that the installation directions of the two electric cylinders are opposite, and when the two groups of electric cylinders are started at the same time, the two groups of horizontal driving mechanisms can be driven to approach or move away from each other in the up and down directions.

[0022] The movable end of each set of horizontal driving mechanisms is connected to a set of flattening mechanisms, and the two sets of flattening mechanisms are symmetrically distributed up and down; the horizontal driving mechanism is used to drive the flattening mechanism to move in the front and back directions; the specific structure of the horizontal driving mechanism is not limited, and it only needs to meet the above-mentioned driving requirements; for example, in the embodiment of the present invention, refer to Figure 2 The horizontal driving mechanism is composed of a motor 7, a screw rod 14, a threaded seat 10 and a guide mechanism, wherein the motor 7 is installed on the movable end of the electric cylinder, the screw rod 14 is connected to the output end of the motor 7, the threaded seat 10 is sleeved on the screw rod 14, and the internal thread of the threaded seat 10 matches the external thread of the screw rod 14; the guide mechanism is a guide rod, one end of the guide rod is connected to the bracket 1, and the guide rod is arranged parallel to the screw rod 14; the threaded seat 10 is slidably connected to the guide rod, and the sliding connection method is not limited. For example, the threaded seat 10 can be slidably sleeved on the guide rod, or it can be connected to a moving block and make the moving block slidably sleeved on the guide rod; based on this, when the motor 7 starts to drive the screw rod 14 to rotate, the threaded seat 10 on the screw rod 14 will move forward or backward on the screw rod 14, thereby driving the flattening mechanism to move forward and backward.

[0023] Each set of flattening mechanisms includes a symmetrical connecting rod and two flattening rollers 11 located on the same horizontal plane, each flattening roller 11 includes a roller shaft 3 and an outer roller 2 rotatably sleeved outside the roller shaft 3, wherein the roller shafts 3 in the two flattening rollers 11 are respectively connected to the two ends of the symmetrical connecting rod; the symmetrical connecting rod includes two L-shaped support rods 4, one end of the two L-shaped support rods 4 is respectively connected to the roller shafts 3 in the two flattening rollers 11, and the other end is connected to the threaded seat 10, and the two L-shaped support rods 4 are symmetrically arranged about the threaded seat 10.

[0024] See also Figure 3 The flattening device is installed on one side of the polarizer conveying mechanism, and the polarizer conveying mechanism includes three guide rollers 16, wherein the first and second guide rollers 16 have the same horizontal height, and are used to convey the polarizer 8 in the horizontal direction; the third guide roller 16 is arranged below the second guide roller 16, and the three guide rollers 16 all have a driving force for synchronous rotation. When the three guide rollers 16 rotate synchronously, the polarizer 8 can be driven to be conveyed; a two-dimensional code printing ink head 5 is arranged between the first and second guide rollers 16 through a two-dimensional code printing ink head bracket 6, and the injection port of the two-dimensional code printing ink head 5 is located above the edge of the polarizer 8; because the material of the pattern sprayed by the two-dimensional code printing ink head 5 is ink, it is necessary to set the outer surface of the outer roller 2 in the flattening roller 11 to be a hydrophobic material to avoid damaging its pattern during flattening.

[0025] See also Figure 4 The flattening device is arranged between the first and second guide rollers 16, and the two sets of flattening mechanisms are respectively located on the upper and lower sides of the polarizer 8, and the two flattening rollers 11 in each set of flattening mechanisms are respectively located on both sides of the two-dimensional code printing ink head 5.

[0026] Working principle of the present invention: In actual production, Figure 3 As shown, the production moving direction of the polarizer 8 is shown by the arrow direction in the figure, that is, moving from right to left; wherein, the polarizer main film 12 is the central area of ​​the polarizer 8, the polarizer white edge 13 is the edge area of ​​the polarizer 8, and the flattening rollers 11 in the two sets of flattening mechanisms are respectively located on the upper and lower sides of the polarizer white edge 13; the inkjet coding system will record the defect information within each meter of the polarizer 8 in the QR code according to the detection information and results of AOI, and print the QR code seal shape in the polarizer white edge 13 area of ​​the polarizer 8 in sequence through the QR code inkjet printing ink head 5, and spray out a QR code every one meter. During this process, the polarizer white edge 13 in the polarizer 8 moves between the flattening rollers 11 of the two sets of flattening mechanisms.

[0027] It should be noted that, on the right side of the two-dimensional code printing ink head 5, the two flattening rollers 11 in the two groups of flattening mechanisms can flatten the polarizer 8 for the first time, making advance preparations for the two-dimensional code printing ink head 5 to print the pattern; on the left side of the two-dimensional code printing ink head 5, the other two flattening rollers 11 in the two groups of flattening mechanisms can flatten the polarizer 8 for the second time. During the first flattening, the white edge 13 of the polarizer has not yet been printed by the two-dimensional code printing ink head 5, but is printed by the two-dimensional code printing ink head 5 after the first flattening. At this time, since the white edge 13 of the polarizer is smoother after the initial flattening, the printed pattern is also more regular, which can avoid the phenomenon that the printed pattern and the white edge 13 of the polarizer are not in contact with each other due to the wrinkles of the white edge 13 of the polarizer.

[0028] After printing, it continues to move to the left for a second flattening. On the one hand, it is to further flatten the white edge 13 of the polarizer. On the other hand, it can also make the printed pattern pass through the rolling of the flattening roller 11 so that its color is firm and evenly spread on the white edge 13 of the polarizer. That is, when there are a few wrinkles in the printing area of ​​the white edge 13 of the polarizer, the inside of the wrinkled part cannot be colored when the pattern is printed. Then, after the white edge 13 of the polarizer is flattened, the wrinkled part will be exposed. At this time, the flattening roller 11 brings the color around the wrinkled part to the wrinkled part, so that the white edge 13 of the polarizer is still in a state of uniform pattern color distribution after being flattened, thereby improving the printing effect and ensuring the correct shape of the two-dimensional code without affecting the subsequent reading of it by other devices.

[0029] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present invention. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. 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 an indirect connection 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 the present invention can be understood according to specific circumstances.

[0031] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A flattening device for printing a two-dimensional code on the edge of a polarizer, characterized in that: The invention comprises a support (1), wherein one side of the support (1) is provided with two groups of flattening mechanisms, and the two groups of flattening mechanisms are symmetrically distributed up and down; each group of flattening mechanisms comprises a symmetrical connecting rod and two flattening rollers (11) located on the same horizontal plane, and each flattening roller (11) comprises a roller shaft (3) and an outer roller (2) rotatably sleeved outside the roller shaft (3), wherein the roller shafts (3) in the two flattening rollers (11) are respectively connected to the two ends of the symmetrical connecting rod; Each set of flattening mechanisms further comprises a horizontal driving mechanism and a vertical driving mechanism, wherein the symmetrical connecting rod is connected to the moving end of the horizontal driving mechanism, and the horizontal driving mechanism is connected to the moving end of the vertical driving mechanism; The vertical driving mechanism is used to drive the horizontal driving mechanism to move up and down, and the horizontal driving mechanism is used to drive the symmetrical connecting rod to move forward and backward.

2. The flattening device for printing a two-dimensional code on the edge of a polarizer according to claim 1, characterized in that: The horizontal driving mechanism comprises a motor (7), a screw rod (14) and a threaded seat (10); one end of the screw rod (14) is connected to the output end of the motor (7); the threaded seat (10) is sleeved on the screw rod (14); the internal thread of the threaded seat (10) matches the external thread of the screw rod (14); the symmetrical connecting rod is connected to the threaded seat (10); and the threaded seat (10) is also connected to a guide mechanism for guiding the threaded seat (10).

3. The flattening device for printing a two-dimensional code on the edge of a polarizer according to claim 2, characterized in that: The symmetrical connecting rods include two L-shaped support rods (4), one end of the two L-shaped support rods (4) is respectively connected to the roller shafts (3) in the two flattening rollers (11), and the other end is connected to the threaded seat (10), and the two L-shaped support rods (4) are symmetrically arranged with respect to the threaded seat (10).

4. The flattening device for printing a two-dimensional code on the edge of a polarizer according to claim 2, characterized in that: The guide mechanism comprises a guide rod arranged parallel to the screw rod (14), one end of the guide rod is connected to the bracket (1), and the threaded seat (10) is slidably connected to the guide rod.

5. The flattening device for printing a two-dimensional code on the edge of a polarizer according to claim 1, characterized in that: The vertical drive mechanism comprises a mounting groove (9) provided on the bracket (1) and an electric cylinder arranged at the bottom end of the mounting groove (9), wherein the movable end of the electric cylinder is connected to the motor (7).

6. The flattening device for printing a two-dimensional code on the edge of a polarizer according to claim 1, characterized in that: The flattening device is installed on one side of a polarizer conveying mechanism, and the polarizer conveying mechanism is used to drive the polarizer (8) for conveyance.

7. The flattening device for printing a two-dimensional code on the edge of a polarizer according to claim 6, characterized in that: The polarizer transmission mechanism comprises three guide rollers (16), wherein the first and second guide rollers (16) have the same horizontal height and are used to transmit the polarizer (8) in the horizontal direction; the third guide roller (16) is arranged below the second guide roller (16), and the three guide rollers (16) are all equipped with a driving force for synchronous rotation.

8. The flattening device for printing a two-dimensional code on the edge of a polarizer according to claim 7, characterized in that: A two-dimensional code inkjet printing head (5) is arranged between the first and second guide rollers (16), and the jetting port of the two-dimensional code inkjet printing head (5) is located above the edge of the polarizing film (8).

9. The flattening device for printing a two-dimensional code on the edge of a polarizer according to claim 8, characterized in that: The flattening device is arranged between the first and second guide rollers (16), and the two sets of flattening mechanisms are respectively located on the upper and lower sides of the polarizer (8).

10. The flattening device for printing a two-dimensional code on the edge of a polarizer according to claim 9, characterized in that: The two flattening rollers (11) in each set of flattening mechanisms are respectively located on two sides of the two-dimensional code printing ink head (5).

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