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Marking method for circular tube printing object overprinting starting point

A marking method and substrate technology, applied in printing, printing devices and other directions, can solve problems such as low overprinting accuracy, and achieve the effects of improving overprinting accuracy, saving production man-hours, and high implementation efficiency

Active Publication Date: 2019-02-05
广东旭展科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of low overprint accuracy of the existing circular tubular color substrate, the present invention provides a marking method for the overprint starting point of the circular tubular substrate

Method used

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  • Marking method for circular tube printing object overprinting starting point
  • Marking method for circular tube printing object overprinting starting point

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Experimental program
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specific Embodiment approach 1

[0018] Specific implementation mode one: as figure 1 , figure 2 As shown, the method for marking the overprint starting point of a circular tubular substrate given in this embodiment specifically includes:

[0019] When the first color is printed on the circular tubular substrate, the sensor is used for ring detection, and a specific point is selected from the detected points of the first color as the overprinting starting point for marking;

[0020] The sensor in this embodiment can be a color mark sensor, an optical fiber sensor and a laser sensor.

[0021] For the color printing of circular tubular substrates, it is necessary to set N printing units according to the number of colors N of the printing pattern to print different colors sequentially. The starting point of N color printing must be consistent with the starting point of the first color printing. Therefore, usually after the first color is printed, the starting point is selected by the sensor for marking, and ...

specific Embodiment approach 2

[0033] Embodiment 2: This embodiment is different from Embodiment 1 in that 1°≤ω≤359°. The circle of the tubular substrate is 360°, and 1°~359° can avoid the situation that the two points obtained are actually the same point due to the influence of error or servo motor delay (the delay is very small and can be ignored).

[0034] Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0035] Embodiment 3: This embodiment is different from Embodiment 1 or Embodiment 2 in that ω is selected as 90°. The line connecting the two points and the center of the circular detection circle is perpendicular to each other, and a special angle is selected to facilitate identification and calculation.

[0036] Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a marking method for a circular tube printing object overprinting starting point, and relates to a marking method for an overprinting starting point, and belongs to the technical field of color printing technology. The marking method for the circular tube printing object overprinting starting point comprises the following steps that when the first color printing is carried out on the circular tube printing object, annular detection is carried out by the aid of a sensor, and selecting one specific point from the detected point of the first color to serve as an overprinting starting point for marking; the selection mode of the specific fixed point is any one of the following steps a, selecting a starting point or an ending point of the maximum distance block; b, selecting a starting point or an ending point of the closest distance cell block; c, selecting a starting point or an ending point in the two points with the largest deviation angle; and d, and selecting astarting point or an ending point in the two points with the deviation angle omega. The marking method solve the problem that the overprinting precision of an existing circular tube colored printing object is low. The method can be applied to printing of circular tube colored printing object.

Description

technical field [0001] The invention relates to a marking method for an overprint starting point, and belongs to the technical field of color printing technology. Background technique [0002] The demand for color printing has grown steadily since the introduction of color printing presses decades ago. Overprinting means that in multi-color printing, it is required that the graphic printing of each color plate needs to be overlapped and registered, that is, the single-color printing plates with different screen line angles obtained after color separation of the original are overlapped and aligned in sequence according to the color sequence of the printing plate, and finally Printing results in the same level and tone as the original. Accurate overprinting is the most basic requirement in multi-color printing, and overprinting accuracy directly affects the quality of printed products during multi-color printing. If the overprinting precision is high, the dot overprint effec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41M1/18B41M1/40
CPCB41M1/18B41M1/40
Inventor 程利军
Owner 广东旭展科技有限公司
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