Printing alignment device for colorless paint

Abstract

The utility model discloses a colorless paint printing alignment device, which comprises a controller, a control device and two groups of printing units, each group of printing unit comprises a plate roller and a mechanical color code disc, the plate roller and the mechanical color code disc are coaxially connected through a connecting shaft, a plurality of color code lines are arranged on the mechanical color code disc, and the printing unit further comprises a color code sensor. The color code sensor is aligned with a color code line of the mechanical color code disc; each printing unit is connected with a control device, the control device controls the mechanical color code disc and the plate roller to rotate together, and the color code sensor of each printing unit and the control device are both electrically connected with the controller. Through the mechanical color code disc which is coaxial with and synchronously rotates with the printing roller, the printing roller is synchronously rotated to the mechanical color code disc, so that the position of the colorless pattern on the printing roller can be determined by detecting the color code line of the mechanical color code disc, and the colorless pattern alignment of the two printing rollers is realized.

Description

Technical Field

[0001] The utility model belongs to the field of printing machinery, and in particular relates to a printing alignment device for colorless coatings. Background Art

[0002] The traditional printing method is to carve a printing pattern on the first plate roller and carve a color mark for identifying the position of the pattern on one edge of the plate roller. Carve a printing pattern on the second plate roller and carve a color mark for identifying the position of the pattern on the edge of the second plate roller. Figure 2-4 In this way, when the printed material passes through printing plate roller one, the pattern and color mark of plate roller one will be printed on the material. When the material passes through printing plate roller two, pattern two and color mark two will be printed on the material. If pattern one and pattern two are required to be aligned, the implementation method is to use color mark sensor one to identify the position of color mark one, and use color mark sensor two to identify the position of color mark two, and then rotate the plate roller position to align the patterns. Because the pattern position and the color mark sensor position are fixed, the positions measured by color mark sensors one and two are recorded. This recorded position is the position of pattern alignment. When the positions of color mark one and color mark two change during the printing process, the color mark sensor will measure it, and then adjust the plate roller position to the originally recorded pattern alignment position to achieve printing pattern alignment. This method can be achieved for colored coatings, but for colorless coatings, this method is not suitable because the color mark sensor cannot recognize the color mark. Utility Model Content

[0003] The utility model aims to provide a printing alignment device for colorless coatings, so as to solve the problem that a color mark sensor cannot recognize a color mark due to the use of colorless coatings during printing.

[0004] The purpose of the utility model is achieved by the following technical means: a printing alignment device for colorless coatings, comprising a controller, a control device and two groups of printing units, each group of printing units comprising a plate roller and a mechanical color standard disk, the plate roller and the mechanical color standard disk being coaxially connected via a connecting shaft, a plurality of color mark lines being provided on the mechanical color standard disk, the printing unit further comprising a color mark sensor, the color mark sensor being aligned with the color mark lines of the mechanical color standard disk;

[0005] Each printing unit is connected to a control device, which controls the mechanical color mark disk and the plate roller to rotate together. The color mark sensor and control device of each printing unit are electrically connected to the controller.

[0006] The color mark line is arranged on the side of the mechanical color mark disk.

[0007] The color mark sensor is aligned with the color mark line on the side of the mechanical color mark disk.

[0008] The plurality of color scale lines are distributed at equal intervals.

[0009] The control device is a motor, and the output shaft of the motor is connected to the plate roller.

[0010] The mechanical color standard disk is connected to one bottom surface of the plate roller through a connecting shaft, and the control device is connected to the other bottom surface of the plate roller.

[0011] The beneficial effect of the utility model is that the rotation of the plate roller is synchronized with the mechanical color scale disk by using the mechanical color scale disk that is coaxial and rotates synchronously with the plate roller, so that the position of the colorless pattern on the plate roller can be determined by detecting the color mark line of the mechanical color scale disk, thereby achieving alignment of the colorless patterns of the two plate rollers. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural diagram of the printing unit;

[0013] Figure 2 This is a structural diagram of an existing printing unit;

[0014] Figure 3 This is a structural diagram of the existing printing unit 2;

[0015] Figure 4 This is the existing printed result diagram;

[0016] In the figure, 1 is the plate roller; 2 is the connecting shaft; 3 is the color mark sensor; 4 is the mechanical color mark disk;

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0018] [Example 1]

[0019] like Figure 1 As shown, a printing alignment device for colorless coatings includes a controller, a control device, and two printing units. Each printing unit includes a plate roller 1 and a mechanical color scale plate 4. The plate roller 1 and the mechanical color scale plate 4 are coaxially connected via a connecting shaft 2. The mechanical color scale plate 4 is provided with a plurality of color mark lines. The printing unit also includes a color mark sensor 3, which is aligned with the color mark lines of the mechanical color scale plate 4.

[0020] Each printing unit is connected to a control device, which controls the mechanical color mark disk 4 and the plate roller 1 to rotate together. The color mark sensor 3 and the control device of each printing unit are electrically connected to the controller.

[0021] The color mark line is arranged on the side of the mechanical color mark disk 4 .

[0022] The color mark sensor 3 is aligned with the color mark line on the side of the mechanical color mark disk 4.

[0023] The plurality of color scale lines are distributed at equal intervals.

[0024] The control device is a motor, and the output shaft of the motor is connected to the plate roller 1.

[0025] The mechanical color scale plate 4 is connected to one bottom surface of the plate roller 1 through the connecting shaft 2, and the control device is connected to the other bottom surface of the plate roller 1.

[0026] The control device drives the printing unit to rotate under the instruction of the controller. In theory, printing unit one and printing unit two rotate at the set speed, but in actual work, there will be an error between the actual speed of the printing unit and the set value, that is, the output value of the control device, resulting in an error between the printed pattern and the actual required position. Therefore, it is necessary to detect the actual position of the printed pattern online.

[0027] Specifically, the plate roller 1 is a cylinder including two bottom surfaces and side surfaces on the left and right sides. The mass to be printed and the colorless coating are arranged on the side surfaces of the plate roller 1 .

[0028] The mechanical color scale plate 4 is connected to one bottom surface of the plate roller 1 , and the control device, ie, the motor, is connected to the other bottom surface of the plate roller 1 .

[0029] Furthermore, the mechanical color scale plate 4, the connecting shaft 2, the plate roller 1 and the output shaft of the control device motor are all coaxial, and the plate roller 1 and the mechanical color scale plate 4 are driven by the motor to rotate synchronously.

[0030] The mechanical color scale plate 4 is also cylindrical, and a plurality of color scale lines are equidistantly engraved on its side. The color scale lines are vertical and perpendicular to the bottom surface. Specifically, the color scale lines are equidistantly engraved at 10mm intervals for identifying the position of the plate roller 1.

[0031] The color mark sensor 3 does not require a specific installation location, and only needs to align the front end with the color mark line on the side of the mechanical color mark disk 4. It can be fixed with an additional bracket or installed on an existing mechanical structure.

[0032] After selecting a color mark line, the color mark sensor 3 detects the time difference between the two color mark lines and compares it with the set speed to determine whether the actual speed has any errors. For example, if the plate roller 1 and the mechanical color mark disk 4 are set to rotate once every 100ms and there are 10 color mark lines, the pattern is normally aligned. At this time, the color mark sensor 3 detects that the interval between the first and second color mark lines is 10ms. If the color mark sensor 3 detects the corresponding color mark line again at a time different from 10ms, the data is fed back to the controller, which adjusts the speed of the control device to restore the plate roller 1 to a rotation of 100ms, thus achieving the purpose of pattern alignment.

[0033] When in use, first rotate the two plate rollers 1 so that the colorless patterns thereon are aligned.

[0034] The color mark sensor 3 of each of the two printing units selects a color mark line of the mechanical color mark disk 4 of the corresponding printing unit as a reference color mark line for detection.

[0035] The two color mark sensors 3 can select different color mark lines. For example, if there are 10 color mark lines, numbered 1-10, the color mark sensor 3 of printing unit 1 initially detects color mark line 3, and the color mark sensor 3 of printing unit 2 initially detects color mark line 4.

[0036] At this time, the color mark line has been determined, and the relative position of the color mark line and the colorless pattern on the plate roller 1 will not change as the plate roller 1 rotates. Therefore, it is only necessary to use the color mark sensor 3 to detect whether the reference color mark line rotates to the correct position at the correct time to know whether the colorless patterns on the two plate rollers 2 are aligned.

[0037] The specific detection method is to use the color mark sensor 3 to detect the time when the reference color mark line is recognized each time, and compare the difference between the two times with the set speed to know whether it is aligned.

[0038] That is, the color mark sensor 3 of the printing unit 1 detects a color mark line, namely No. 4, after 10ms, and detects a color mark line No. 5 after another 10ms. If it is not detected after 10ms, it means that the pattern is not aligned.

[0039] The detection is based on the alignment of a color mark line, whether the next color mark line is detected every 10ms.

[0040] For example, if printing unit 1 is set to rotate once every 100ms, and printing unit 2 is set to rotate once every 100ms, the color mark sensor will measure the color mark twice in 10ms. If both detection data match the setting, the colorless patterns on the two printing rollers 1 are aligned. If the detection data does not match, feedback is sent to the controller, which changes the speed of the control device so that the next detection data matches the setting, and the colorless patterns on the two printing rollers 1 are aligned.

Claims

1. A printing alignment device for colorless coating, characterized in that: The invention comprises a controller, a control device and two groups of printing units, each group of printing units comprises a plate roller (1) and a mechanical color standard disk (4), the plate roller (1) and the mechanical color standard disk (4) are coaxially connected via a connecting shaft (2), a plurality of color standard lines are provided on the mechanical color standard disk (4), and the printing unit further comprises a color standard sensor (3), and the color standard sensor (3) is aligned with the color standard lines of the mechanical color standard disk (4); Each printing unit is connected to a control device, which controls the mechanical color mark disk (4) and the plate roller (1) to rotate together. The color mark sensor (3) and the control device of each printing unit are electrically connected to the controller.

2. The printing alignment device for colorless coating according to claim 1, characterized in that: The color mark line is arranged on the side of the mechanical color mark disk (4).

3. The printing alignment device for colorless coating according to claim 2, characterized in that: The color mark sensor (3) is aligned with the color mark line on the side of the mechanical color mark disk (4).

4. A printing alignment device for colorless coating according to claim 1 or 2, characterized in that: The plurality of color scale lines are distributed at equal intervals.

5. The printing alignment device for colorless coating according to claim 1, characterized in that: The control device is a motor, and the output shaft of the motor is connected to the plate roller (1).

6. The printing alignment device for colorless coating according to claim 1, characterized in that: The mechanical color scale disk (4) is connected to one bottom surface of the plate roller (1) via a connecting shaft (2), and the control device is connected to the other bottom surface of the plate roller (1).

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