阅读说明：本技术 一种透明印刷材料的套印装置及套印方法 (Overprinting device and overprinting method for transparent printing material ) 是由 邢顺川 都基超 林龙杰 栾军 马理 董春莹 孙德武 刘治 于 2020-12-30 设计创作，主要内容包括：本发明公开一种透明印刷材料的套印装置,其特征在于：所述的装置包括印刷辊,所述印刷辊由同轴且等径的主图文辊(1)和光标辊(2)两部分组成,且主图文辊(1)和光标辊(2)通过连接轴(3)连接,连接轴(3)的外径小于主图文辊(1)的外径,与所述印刷辊相配有印刷槽(4),所述印刷槽(4)内设置有隔板(5),隔板(5)将印刷槽(4)分为油墨槽(6)和透明涂层槽(7)两部分,在工作状态下,所述隔板(5)的顶端高于主图文辊(1)和光标辊(2)的底边沿。同时还公开了一种利用上述装置进行透明印刷材料套印的方法。(The invention discloses an overprinting device for transparent printing materials, which is characterized in that: the device include the printing roller, the printing roller comprises coaxial and equal footpath main graph and text roller (1) and cursor roller (2) two parts, and main graph and text roller (1) and cursor roller (2) are connected through connecting axle (3), and the external diameter of connecting axle (3) is less than the external diameter of main graph and text roller (1), with the printing roller is matched with printing groove (4), be provided with baffle (5) in printing groove (4), baffle (5) divide into printing ink groove (6) and clear coat groove (7) two parts with printing groove (4), under operating condition, the top of baffle (5) is higher than the base edge of main graph and text roller (1) and cursor roller (2). Also discloses a method for overprinting transparent printing materials by using the device.)

1. An overprinting device for transparent printing materials, characterized in that: the device include the printing roller, the printing roller comprises coaxial and equal footpath main graph and text roller (1) and cursor roller (2) two parts, and main graph and text roller (1) and cursor roller (2) are connected through connecting axle (3), and the external diameter of connecting axle (3) is less than the external diameter of main graph and text roller (1), with the printing roller is matched with printing groove (4), be provided with baffle (5) in printing groove (4), baffle (5) divide into printing ink groove (6) and clear coat groove (7) two parts with printing groove (4), under operating condition, the top of baffle (5) is higher than the base edge of main graph and text roller (1) and cursor roller (2).

2. A method of printing a transparent printing material using the overprinting apparatus according to claim 1, wherein: fill normal printing ink in ink groove (6), fill transparent printing ink, clear coating, transparent gloss lacquer or transparent cold seal glue in clear coating groove (7), the bottom border of printing roller immerses printing groove (4), lets cursor roller (2) fully contact with the normal printing ink in ink groove (6), and transparent printing ink, clear coating or the transparent cold seal glue in main graph writing roller (1) and clear coating groove (7) fully contact, then utilize the printing roller to print.

Technical Field

The invention relates to the field of printing, in particular to an overprinting device and an overprinting method for a transparent printing material.

Background

Overprinting is a common printing mode, which means that image-text printing of each color plate is required to be in overlapping registration during multicolor printing, that is, single-color printing plates with different screen angles, which are prepared by color separation of an original, are sequentially overlapped and registered according to the color sequence of the printing plates, and finally, a printed product with the same level and color tone as the original is obtained by printing. In order to guarantee the accuracy of the monochromatic printing plate each time, color codes with colors need to be printed at the edges of printed matters in the overprinting process, and the overprinting position is adjusted by an overprinting system according to the variation of the positions of the color codes, so that the quality of final pictures and texts is guaranteed.

For printing materials such as transparent ink, varnish, coating or cold sealing glue, the materials have no color, and when the materials are printed on the surfaces of films or paper, the positions of color marks printed after drying are colorless, so that the photoelectric device is difficult to detect, the color marks cannot be used for positioning, and the efficient production cannot be realized under normal conditions.

In the prior art, a fluorescent substance, a colored ink or the like is often added to a colorless material so that an optoelectronic device can detect the colorless material during printing. However, in the aspect of food packaging, the fluorescent substance contained has great influence on the safety of packaged food, and the national standard regulation is restricted in use, so that the use of the method is restricted.

There is therefore a need for a method or apparatus that addresses the above-mentioned problems.

Disclosure of Invention

The invention aims to solve the defects in the prior art, provides an overprinting device which meets the verification requirement of a transparent printing material and ensures the printing quality and accuracy in the overprinting process, and also discloses a method for realizing overprinting by using the overprinting device.

The technical solution of the invention is as follows: an overprinting device for transparent printing materials, characterized in that: the device include the printing roller, the printing roller comprises coaxial and 2 two parts of main picture and text roller 1 and cursor roller of constant diameter, and main picture and text roller 1 and cursor roller 2 connect through connecting axle 3, and the external diameter of connecting axle 3 is less than the external diameter of main picture and text roller 1, with the printing roller is matched with printing groove 4, be provided with baffle 5 in the printing groove 4, baffle 5 divide into printing ink tank 6 and clear coat layer groove 7 two parts with printing groove 4, under operating condition, baffle 5's top is higher than the end border of main picture and text roller 1 and cursor roller 2.

A method of printing a transparent printing material using an overprinting apparatus as described above, characterized in that: normal ink is poured into the ink groove 6, transparent ink, a transparent coating, transparent gloss paint or transparent cold sealing glue is poured into the transparent coating groove 7, the bottom edge of the printing roller is immersed into the printing groove 4, the cursor roller 2 is enabled to be in full contact with the normal ink in the ink groove 6, the main image-text roller 1 is in full contact with the transparent ink, the transparent coating, the transparent gloss paint or the transparent cold sealing glue in the transparent coating groove 7, and then the printing roller is used for printing.

Compared with the prior art, the invention has the following advantages:

the overprinting device for the transparent printing material is simple in structure, ingenious in design and reasonable in layout, and is designed to solve the problems existing in overprinting of the traditional transparent material, a special structure is designed to creatively divide a printing groove into two parts, and a printing roller is also designed into two parts matched with the printing groove, so that a cursor roller part on the printing roller can be stained with colored normal ink to print a cursor in one-time printing operation, and a main image roller part can be stained with the transparent printing material (such as transparent ink, a transparent coating, transparent varnish or transparent cold sealing glue) to print the transparent material on the main body part of a printed body. The overprinting device and the overprinting method matched with the overprinting device solve the problems existing in the traditional process of printing the transparent material, and can realize the effective printing of the transparent printing material without any addition on the premise of ensuring the printing accuracy.

Drawings

Fig. 1 is a schematic structural diagram of an overprinting apparatus according to an embodiment of the present invention.

Detailed Description

The following description will explain embodiments of the present invention with reference to the accompanying drawings. As shown in fig. 1: the utility model provides an overprinting device of transparent printing material, it includes the printing roller, the printing roller comprises coaxial and 2 two parts of main picture and text roller and cursor roller of constant diameter, and main picture and text roller 1 and cursor roller 2 are connected through connecting axle 3, and the external diameter of connecting axle 3 is less than the external diameter of main picture and text roller 1, with the printing roller is matched with printing groove 4, be provided with baffle 5 in the printing groove 4, baffle 5 divide into printing ink tank 6 and clear coat groove 7 two parts with printing groove 4, under operating condition, the top of baffle 5 is higher than the end border of main picture and text roller 1 and cursor roller 2.

A method of printing a transparent printing material using an overprinting device as described above, operating according to the following steps: normal ink is poured into the ink groove 6, transparent ink, a transparent coating or transparent cold sealing glue is poured into the transparent coating groove 7, the bottom edge of the printing roller is immersed into the printing groove 4, the cursor roller 2 is enabled to be in full contact with the normal ink in the ink groove 6, the main image-text roller 1 is in full contact with the transparent ink, the transparent coating, the transparent gloss paint or the transparent cold sealing glue in the transparent coating groove 7, and then the printing roller is used for printing.

In the overprinting device, the inner cavity of the printing groove 4 is divided into the ink groove 6 and the transparent coating groove 7 by the partition plate 5, which is equivalent to designing independent spaces for normal colored ink and transparent printing materials, so that the cursor roller 2 and the main pattern roller 1 cannot be influenced mutually during printing; meanwhile, the main image-text roller 1 and the cursor roller 2 are connected into an integral structure through the connecting shaft 3, namely, the main image-text roller and the cursor roller synchronously rotate at the same time, so that the printing precision can be ensured when the main image-text roller and the cursor roller respectively work; the cursor roller 2 is printed with a color code part for checking, and the main image character roller 1 is simultaneously printed with formal image character materials, so that the color code part can play a role in checking the position precision, and colored ink does not need to be mixed into the transparent printing material.