CN-121978862-A - Cylindrical lens grating three-dimensional printing platemaking and zooming method

CN121978862ACN 121978862 ACN121978862 ACN 121978862ACN-121978862-A

Abstract

The invention discloses a cylindrical lens grating three-dimensional printing platemaking zoom method which comprises the following steps of taking one color as a reference color, taking other three colors as adjustment colors, respectively measuring deviation between adjustment color overprinting lines on two sides of an original four-color plate text and the reference color overprinting lines, calculating to obtain overprinting error values between the adjustment colors and the reference colors, calculating to obtain the zoom rate of the zoomed adjustment color plate text relative to the original adjustment color plate text, calculating to obtain the width of the zoomed adjustment color plate text, calculating to obtain the resolution of the zoomed adjustment color plate text, calculating to obtain the grating data of the zoomed adjustment color plate text, and manufacturing a zoomed four-color three-dimensional printing color plate. The invention can take the reference color plate text as the reference, and can accurately overprint the four-color overprinting lines after the scaling adjustment of other three-adjustment color plates and the reference color plate are combined to prepare the four-color three-dimensional printing color plate, namely the invention can improve the overprinting accuracy of the scaled four-color plate text.

Inventors

XIONG CHANGYOU
Deng Fuzhao
LONG WEICAI
MA YANJUN
DENG GANG
YANG CHENGYAN
LIN DAJUN
XU XIAOXIA
HE HUANMIN
Xu Sanfu
ZHANG XUBIN

Assignees

四川省宜宾普什集团3D有限公司
四川省宜宾普拉斯包装材料有限公司

Dates

Publication Date: 20260505
Application Date: 20260109

Claims (10)

1. The lenticular grating three-dimensional printing platemaking and scaling method is characterized by comprising the following steps of: Taking one color as a reference color and the other three colors as regulating colors; Respectively measuring deviation between the adjusting color overprinting lines and the reference color overprinting lines on two sides of the original four-color pattern text; According to the deviation between the adjusting color overprinting lines on two sides of the original four-color pattern text and the reference color overprinting lines, calculating to obtain overprinting error values between the adjusting colors and the reference colors; calculating the scaling rate of the scaled adjustment color plate text relative to the original adjustment color plate text according to the overprinting error value between the adjustment color and the reference color; calculating to obtain the width of the scaled adjustment color plate graph and text according to the scaling rate of the scaled adjustment color plate graph and text relative to the original adjustment color plate graph and text and the width of the original adjustment color plate graph and text; according to the width of the scaled adjustment color pattern and text and the transverse total pixels of the original adjustment color pattern and text, calculating to obtain the resolution of the scaled adjustment color pattern and text; According to the resolution ratio of the scaled and adjusted color plate image and text and the number of grating lenses of the original adjusted color plate image and text, calculating to obtain grating data of the scaled and adjusted color plate image and text; and manufacturing the scaled four-color three-dimensional printing color plate according to the grating data of the three scaled adjustment color plate images and texts and the grating data of the reference color plate images and texts.
2. The lenticular stereoscopic printing platemaking method according to claim 1, wherein if the adjustment color overprint line is inside the reference color overprint line, the deviation between the adjustment color overprint line and the reference color overprint line is negative; If the adjustment color overprinting line is outside the reference color overprinting line, the deviation between the adjustment color overprinting line and the reference color overprinting line is positive deviation.
3. The lenticular stereoscopic printing platemaking and scaling method according to claim 2, wherein the overprinting error value between the adjustment color and the reference color is equal to the sum of the deviations between the adjustment color overprinting lines and the reference color overprinting lines on both sides of the original four-color layout text.
4. The lenticular grating three-dimensional printing platemaking scaling method according to claim 3, wherein the calculation formula of the scaling rate x of the scaled adjustment color plate text relative to the original adjustment color plate text is: where e is the overprint error value between the adjustment color and the reference color.
5. The method for scaling lenticular three-dimensional printing plate according to claim 4, wherein the calculation formula for adjusting the width S of the color plate graph-text after scaling is as follows: wherein Y is the width of the original color-adjusting color plate graph and text.
6. The method for scaling lenticular three-dimensional printing plate according to claim 5, wherein the calculation formula for adjusting the resolution K of the color plate image and text after scaling is as follows: Wherein W is the transverse total pixel of the original color-adjusting color plate image-text.
7. The method for scaling lenticular three-dimensional printing plate according to claim 6, wherein the calculation formula of the scaled raster data L for adjusting the color version image and text is as follows: Wherein N is the number of grating lenses of the original color plate image and text.
8. The method for scaling lenticular stereoscopic printing plate according to claim 1, wherein the step of manufacturing the scaled four-color stereoscopic printing plate according to the three scaled raster data of the adjustment color plate image and the reference color plate image comprises: respectively manufacturing three scaled color plates according to grating data of the three scaled color plate images and texts; And combining the three scaled adjustment color plates and a reference color plate to manufacture the scaled four-color stereoscopic printing color plate.
9. The method for scaling lenticular three-dimensional printing plate according to claim 1, wherein scaled four-color plate images and texts are printed by utilizing scaled four-color three-dimensional printing color plate gratings.
10. The lenticular stereolithography process of claim 1, wherein the reference color is red or blue.

Description

Cylindrical lens grating three-dimensional printing platemaking and zooming method Technical Field The invention belongs to the technical field of 3D (three-dimensional) printing, and particularly relates to a lenticular grating three-dimensional printing platemaking and zooming method. Background The 3D stereolithography technology belongs to the field of lithography, which is a special printing technology. Compared with traditional lithographic printing, the 3D stereoscopic printing technology has higher printing screen line number and extremely high overprinting precision requirement due to the cylindrical lens amplification principle of the 3D grating material. At present, the 3D stereoscopic printing technology is widely applied to the fields of cartoon game cards, greeting cards, high-end cosmetic packages, electronic packages, food packages and the like. At present, a set of four-color three-dimensional printing color plate is generally manufactured according to data of grating materials by a 3D three-dimensional printing technology, and four-color plate images and texts are printed in a four-color three-dimensional mode by adopting an offset printing technology, wherein four-color overprinting lines are arranged on two sides of the four-color plate images and texts. However, the grating material is deformed under the influence of the temperature, pressure and other printing effects of the four color seats of the printer, so that the four-color plate graphics and texts after four-color three-dimensional printing are influenced, and the situation that one or more colors of the four-color plate graphics and texts are not overprinted is caused. Disclosure of Invention The invention provides a cylindrical lens grating three-dimensional printing platemaking scaling method for overcoming the defects of the prior art, which can improve the registration accuracy of four-color plate pictures and texts after scaling. The aim of the invention is achieved by the following technical scheme: a lenticular grating three-dimensional printing platemaking and scaling method comprises the following steps: Taking one color as a reference color and the other three colors as regulating colors; Respectively measuring deviation between the adjusting color overprinting lines and the reference color overprinting lines on two sides of the original four-color pattern text; According to the deviation between the adjusting color overprinting lines on two sides of the original four-color pattern text and the reference color overprinting lines, calculating to obtain overprinting error values between the adjusting colors and the reference colors; calculating the scaling rate of the scaled adjustment color plate text relative to the original adjustment color plate text according to the overprinting error value between the adjustment color and the reference color; calculating to obtain the width of the scaled adjustment color plate graph and text according to the scaling rate of the scaled adjustment color plate graph and text relative to the original adjustment color plate graph and text and the width of the original adjustment color plate graph and text; according to the width of the scaled adjustment color pattern and text and the transverse total pixels of the original adjustment color pattern and text, calculating to obtain the resolution of the scaled adjustment color pattern and text; According to the resolution ratio of the scaled and adjusted color plate image and text and the number of grating lenses of the original adjusted color plate image and text, calculating to obtain grating data of the scaled and adjusted color plate image and text; and manufacturing the scaled four-color three-dimensional printing color plate according to the grating data of the three scaled adjustment color plate images and texts and the grating data of the reference color plate images and texts. Further, if the adjustment color overprinting line is inside the reference color overprinting line, the deviation between the adjustment color overprinting line and the reference color overprinting line is negative; If the adjustment color overprinting line is outside the reference color overprinting line, the deviation between the adjustment color overprinting line and the reference color overprinting line is positive deviation. Further, the overprinting error value between the adjustment color and the reference color is equal to the sum of the deviation between the adjustment color overprinting lines and the reference color overprinting lines on two sides of the original four-color pattern text. Further, the calculation formula of the scaling rate x of the scaled adjustment color plate text relative to the original adjustment color plate text is as follows: where e is the overprint error value between the adjustment color and the reference color. Further, the calculation formula of the width S of the color version image-text after scaling is adjusted is a