Printing paper expansion line automatic registration system and registration method

Abstract

The invention discloses a printing paper expansion line automatic registration system and a registration method, and belongs to the technical field of printing equipment, color codes are printed on the two sides of printing paper, a color code detector detects the deviation between two adjacent color codes, and the error between the adjacent color codes in the paper web direction of the printing paper is determined; the color code detector drives the micro linear motor to drive the supporting arm to further drive the line expanding wheel to jack up printing paper, and printing errors are adjusted. Through the arrangement of the color codes and the color code detector, the size of errors between the color codes of all colors in the paper web direction is determined, the line expansion wheel and the micro linear motor are driven to act synergistically, the printing error is adjusted, the line expansion condition in the printing process is monitored and adjusted in real time, deviation can be found in time, tracking and adjusting are achieved in time, and the printing quality is improved. The printing stability and precision are remarkably improved, meanwhile, the skill requirement for an operator is lowered, and the labor intensity is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of printing equipment, and in particular relates to an automatic registration system for a printed paper expansion line, and also relates to an automatic registration method for a printed paper expansion line. Background Art

[0002] A printing press is a machine for printing text and images. Modern printing presses are generally composed of mechanisms such as plate mounting, inking, embossing, and paper feeding (including folding). Its working principle is: first, the text and image to be printed are made into a printing plate, which is then mounted on the printing press. Then, ink is applied to the places on the printing plate where the text and image are, either manually or by the printing press, and then directly or indirectly transferred to paper or other substrates (such as textiles, metal plates, plastics, leather, wood boards, glass, and ceramics), thereby replicating a printed product identical to the printing plate.

[0003] In the field of rotary printing presses, during the printing process, the ink contacts the printing plate, and the image is transferred to the paper through the rubber roller. After the paper is printed one by one in each color group, the paper width will gradually widen due to the pressure of the rubber roller after the paper absorbs water, resulting in the image being larger in the width direction of the paper printed first, and smaller in the width direction of the paper printed later, resulting in the phenomenon of misregistration in the width direction of the paper, which is usually called printing line expansion. At present, the line expansion wheel structure can only be adjusted manually after the error is manually determined, and the detection and automatic adjustment of the line expansion error cannot be realized. The automatic line expansion registration system mainly solves the problem of line expansion in the width direction of the printed paper, and meets the requirements of overprinting after the paper expands. Summary of the invention

[0004] The first purpose of the present invention is to provide an automatic registration system for printing paper expansion lines, which solves the technical problem that the expansion wheel structure is purely manually adjusted after the error is manually determined in the prior art, and the expansion error cannot be detected and automatically adjusted.

[0005] The second object of the present invention is to provide a method for automatically registering the expansion line of printed paper.

[0006] The first technical solution adopted by the present invention is an automatic registration system for the expansion line of printing paper, including an adjustment mechanism, a roller group and a color mark detector arranged in sequence along the moving direction of the printing paper, the adjustment mechanism abuts against the bottom of the printing paper, the printing paper passes through the roller group, the color mark detector is located at the top of the printing paper, the color mark detector is connected to the adjustment mechanism signal, and a plurality of color marks are printed on the top surface of the printing paper along the moving direction and on both sides of the adjustment mechanism.

[0007] The first technical solution of the present invention is also characterized in that: The adjustment mechanism includes a wall panel support shaft, a fixed seat is fixedly connected to the outer wall of the wall panel support shaft, the fixed seat is respectively connected to the support arm and the micro linear motor, the fixed seat is connected to the support arm through a rotating shaft, the support arm is rotatably connected to a wire tensioning wheel, the wire tensioning wheel abuts against the printed paper, and the telescopic end of the micro linear motor abuts against the support arm.

[0008] Three groups of adjustment mechanisms are evenly distributed at the bottom of the printing paper along the direction perpendicular to the paper movement. The wire tensioning wheels of one group of adjustment mechanisms are located at the center line of the printing paper, and the wire tensioning wheels of the other two groups of adjustment mechanisms are symmetrically arranged relative to the center line of the printing paper.

[0009] The roller group comprises a roller a and a roller b. The roller a and the roller b are respectively arranged on both sides of the printing paper. The roller a and the roller b are in rolling contact with the printing paper.

[0010] The plurality of color marks are divided into two groups, the two groups of color marks are symmetrically arranged along the center line of the paper, and the color of each group of color marks is different along the moving direction.

[0011] The second technical solution adopted by the present invention is an automatic registration method for the expansion line of printed paper. The above-mentioned automatic registration system for the expansion line of printed paper is adopted to print color marks on both sides of the printed paper. The color mark detector detects the deviation between two adjacent color marks to determine the error size between the color marks in the paper width direction of the printed paper. The color mark detector drives the micro linear motor to drive the support arm to further drive the expansion wheel to lift the printed paper and adjust the printing error.

[0012] The beneficial effects of the present invention are: The present invention determines the deviation between the color marks of each color in the paper direction through the arrangement of color marks and color mark detectors, drives the line expansion wheel and the micro linear motor to work together, adjusts the printing error, and monitors and adjusts the line expansion situation during printing in real time. The deviation can be discovered in time, and timely tracking and adjustment can be made, so that the printing stability and accuracy are significantly improved, while also reducing the skill requirements for the operator and the labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the automatic registration system for printing paper expansion line of the present invention; Figure 2 yes Figure 1 Top view of the .

[0014] In the figure, 1. wire tensioning wheel, 2. support arm, 3. micro linear motor, 4. rotating shaft, 5. fixed seat, 6. wall panel support shaft, 7. color mark detector, 8. color mark, 9. printing paper, 10. roller a, 11. roller b. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0016] Example 1 like Figure 1 , Figure 2 As shown, the automatic registration system for the expansion line of printing paper disclosed in the present invention comprises an adjustment mechanism, a roller group and a color mark detector 7 which are sequentially arranged along the moving direction of the printing paper 9. The adjustment mechanism abuts against the bottom of the printing paper 9 and is used to provide an upward force to the printing paper 9. The printing paper 9 passes through the roller group and is used to transfer and press materials to ensure the quality and effect of the printed matter. The color mark detector 7 is located at the top of the printing paper 9. The color mark detector 7 is connected to the adjustment mechanism signal. A plurality of color marks 8 are printed on the top surface of the printing paper 9 along the moving direction and on both sides of the adjustment mechanism. The color mark detector 7 is used to detect the distance between the color marks 8 of the same color in the paper width direction, and the error between the color marks 8 of the same color in the paper width direction of the printing paper 9 is determined according to the detected distance. The color mark detector 7 drives the adjustment mechanism to lift up the printing paper 9 and adjust the printing error.

[0017] The working principle of the color mark detector 7 is based on the reflection and reception of light. When the light source of the color mark sensor shines on the color mark 8, the color mark 8 reflects light, which is received by the sensor and converted into an electrical signal. By comparing the difference in the reflection of light between the color mark 8 and other objects, the sensor can determine the position and distance of the color mark 8. Color mark sensors usually use incandescent lamps or monochromatic light sources, such as green LEDs or red LEDs, which can provide sufficient brightness and have high sensitivity.

[0018] In this embodiment, there are 5 color mark blocks in the color mark 8, and the first and fifth are the same color, which are used to determine the printing reference. The three middle color marks are color mark blocks of different colors, corresponding to different printing units. Theoretically, the 5 color mark blocks in the color mark 8 are on the same straight line. During actual printing, the vertical distance between the color mark blocks of different colors and the line connecting the first and fifth color mark blocks will not be 0, that is, there will be a rising line overprint error. At this time, the actuator will drive the rising line wheel 1 to adjust the paper and adjust the vertical distance error to 0. The color marks 8 on both sides are adjusted respectively corresponding to the rising line wheels 1 on both sides. When the middle rising line wheel 1 is adjusted, the left and right sides of the paper will change, and the rising line errors in the color marks 8 on both sides can be adjusted at the same time.

[0019] Example 2 The printing paper rising line automatic registration system disclosed in this embodiment includes an adjustment mechanism, a roller group and a color mark detector 7 arranged in sequence along the moving direction of the printing paper 9, the adjustment mechanism abuts against the bottom of the printing paper 9, the printing paper 9 passes through the roller group, the color mark detector 7 is located at the top of the printing paper 9, the color mark detector 7 is connected to the adjustment mechanism signal, and a plurality of color marks 8 are printed on the top surface of the printing paper 9 along the moving direction and on both sides of the adjustment mechanism; and also includes an adjustment mechanism, a roller group and a color mark detector 7 arranged in sequence along the moving direction of the printing paper 9, the adjustment mechanism abuts against the printing paper 9 At the bottom, the printed paper 9 passes through the roller group, the color mark detector 7 is located on the top of the printed paper 9, the color mark detector 7 is connected to the signal of the adjustment mechanism, and a number of color marks 8 are printed on the top surface of the printed paper 9 along the moving direction and on both sides of the adjustment mechanism; the adjustment mechanism includes a wall panel support shaft 6, and a fixed seat 5 is fixedly connected to the outer wall of the wall panel support shaft 6. The fixed seat 5 is respectively connected to the support arm 2 and the micro linear motor 3, and the fixed seat 5 is connected to the support arm 2 through a rotating shaft 4. The support arm 2 is rotatably connected to a wire tensioning wheel 1, the wire tensioning wheel 1 abuts against the printed paper 9, and the telescopic end of the micro linear motor 3 abuts against the support arm 2.

[0020] The color mark detector 7 controls the telescopic end of the micro linear motor 3 to telescope up and down according to the detection result, drives the support arm 2 to rotate around the rotating shaft 4, and further drives the wire-winding wheel 1 to push the printed paper 9 upward to adjust the printing error and realize automatic wire-winding registration.

[0021] Three groups of adjustment mechanisms are evenly distributed at the bottom of the printing paper 9 along the direction perpendicular to the paper moving direction, one group of adjustment mechanisms has the wire-increasing wheels 1 located at the center line of the printing paper 9, and the other two groups of adjustment mechanisms have the wire-increasing wheels 1 symmetrically arranged relative to the center line of the printing paper 9. The wire-increasing wheels 1 of the three groups of adjustment mechanisms are respectively used to inflate different paper width positions at the bottom of the printing paper 9.

[0022] The roller group includes a roller a10 and a roller b11 . The roller a10 and the roller b11 are respectively arranged on both sides of the printing paper 9 . The roller a10 and the roller b11 are in rolling contact with the printing paper 9 .

[0023] After the printed paper 9 is lifted up, when it enters the contact position between the roller a10 and the roller b11, the paper width will become smaller. After printing, the image and text will become larger along the paper width direction. When printing the color mark, the color mark detector 7 drives the micro linear motor 3 to drive the wire-increasing wheel 1 to lift the printed paper 9, which can correct the paper width dimensions of the color marks 8 of various colors to ensure that the paper width dimensions of the color marks 8 are consistent, thereby achieving the automatic registration effect of the wire-increasing.

[0024] Example 3 The automatic registration system for increasing the line of printed paper disclosed in this embodiment comprises an adjustment mechanism, a roller group and a color mark detector 7 which are sequentially arranged along the moving direction of the printed paper 9, the adjustment mechanism abuts against the bottom of the printed paper 9, the printed paper 9 passes through the roller group, the color mark detector 7 is located at the top of the printed paper 9, the color mark detector 7 is connected to the adjustment mechanism signal, a plurality of color marks 8 are printed on the top surface of the printed paper 9 along the moving direction and on both sides of the adjustment mechanism, the adjustment mechanism comprises a wall panel support shaft 6, a fixing seat 5 is fixedly connected to the outer wall of the wall panel support shaft 6, the fixing seat 5 is respectively connected to a support arm 2 and a micro linear motor 3, the fixing seat 5 is connected to the support arm 2 through a rotating shaft 4, the support arm 2 is rotatably connected to a line increase wheel 1, the line increase wheel 1 abuts against the printed paper 9, and the telescopic end of the micro linear motor 3 abuts against the support arm 2. In this embodiment, a plurality of color marks 8 are divided into two groups, the two groups of color marks 8 are symmetrically arranged along the center line of the paper, the colors of each group of color marks 8 are different along the moving direction, the color marks 8 are standard color marks, and match the color mark detector 7.

[0025] The present invention also discloses an automatic registration method for the expansion line of printed paper. The above-mentioned automatic registration system for the expansion line of printed paper is used to print color marks 8 on both sides of the printed paper 9. The color mark detector 7 detects the deviation between two adjacent color marks 8 to determine the error size between the color marks 8 in the paper width direction of the printed paper 9. The color mark detector 7 drives the micro linear motor 3 to drive the support arm 2 to further drive the expansion wheel 1 to lift the printed paper 9 to adjust the printing error.

[0026] Figure 2 In the figure, the middle winding wheel 1 lifts up the printed paper 9 to realize the simultaneous winding adjustment of the color marks 8 on both sides of the paper format direction; the winding wheels 1 on both sides lift up the printed paper 9 to only adjust the winding registration error of the color mark 8 on one side.

[0027] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0028] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0029] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The automatic registration system for printing paper expansion line is characterized by: The invention comprises an adjustment mechanism, a roller group and a color mark detector (7) which are arranged in sequence along the moving direction of a printing paper (9), the adjustment mechanism abuts against the bottom of the printing paper (9), the printing paper (9) passes through the roller group, the color mark detector (7) is located on the top of the printing paper (9), the color mark detector (7) is connected to the adjustment mechanism signal, and a plurality of color marks (8) are printed on the top surface of the printing paper (9) along the moving direction and on both sides of the adjustment mechanism.

2. The printing paper expansion automatic registration system according to claim 1, characterized in that: The adjustment mechanism comprises a wall panel support shaft (6); a fixing seat (5) is fixedly connected to the outer wall of the wall panel support shaft (6); the fixing seat (5) is respectively connected to a support arm (2) and a micro linear motor (3); the fixing seat (5) is connected to the support arm (2) via a rotating shaft (4); the support arm (2) is rotatably connected to a wire tensioning wheel (1); the wire tensioning wheel (1) abuts against the printed paper (9); and the telescopic end of the micro linear motor (3) abuts against the support arm (2).

3. The printing paper expansion automatic registration system according to claim 2 is characterized in that: Three groups of adjustment mechanisms are evenly distributed on the bottom of the printing paper (9) along a direction perpendicular to the paper movement direction, wherein the tensioning wheels (1) of one group of adjustment mechanisms are located at the center line of the printing paper (9), and the tensioning wheels (1) of the other two groups of adjustment mechanisms are symmetrically arranged relative to the center line of the printing paper (9).

4. The printing paper expansion automatic registration system according to claim 2, characterized in that: The roller group comprises a roller a (10) and a roller b (11), wherein the roller a (10) and the roller b (11) are respectively arranged on both sides of the printing paper (9), and the roller a (10) and the roller b (11) are in rolling contact with the printing paper (9).

5. The printing paper expansion automatic registration system according to claim 2, characterized in that: The plurality of color marks (8) are divided into two groups, the two groups of color marks (8) are symmetrically arranged along the center line of the paper, and the colors of the color marks (8) in each group are different along the moving direction.

6. A method for automatically registering the expansion line of printed paper, using the automatic registration system for the expansion line of printed paper as claimed in any one of claims 2 to 5, characterized in that: Color marks (8) are printed on both sides of a printing paper (9), and a color mark detector (7) detects the deviation between two adjacent color marks (8) to determine the error between the color marks (8) in the paper web direction of the printing paper (9). The color mark detector (7) drives a micro linear motor (3) to drive a support arm (2) to further drive a tensioning wheel (1) to lift the printing paper (9) to adjust the printing error.

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