阅读说明：本技术 一种凹印珠光油墨改连线柔印的方法 (Method for changing gravure pearlescent ink into online flexo printing ) 是由 郭镇洪 王宏伟 张小岗 胡松 于 2019-11-21 设计创作，主要内容包括：本发明公开了一种凹印珠光油墨改连线柔印的方法,包括如下步骤：制作柔印版；制作印版辊筒；选用网纹辊；更换凹版印刷机组；增加胶印机组；印刷操作：首先进行上卷料、走纸工作,然后对承印材料进行调整纠偏工作,保证后续正常的走料,随后调节印版辊与网纹辊和胶印辊之间的压力,使三辊能够正常进行印刷工作,之后,进行珠光油墨的上墨工作,后续经过压印、干燥、模切、分切、收卷等工序便可以完成柔版印刷工作。该凹印珠光油墨改连线柔印的方法,将凹版印刷的方式改变成柔版印刷的方式,因此采用柔版印刷与胶印相结合完成连线柔印生产,通过印刷油墨的调整、印刷方式的改变与结合,可大大节约成本,提高生产效率与成品率。(The invention discloses a method for changing gravure pearlescent ink into connection line flexo printing, which comprises the following steps: manufacturing a flexible printing plate; manufacturing a printing plate roller; selecting an anilox roller; replacing the gravure printing unit; adding an offset printing unit; printing operation: the method comprises the following steps of firstly carrying out coil feeding and paper feeding, then carrying out adjustment and deviation rectification on a printing material to ensure subsequent normal feeding, then adjusting the pressure between a printing plate roller and an anilox roller and an offset printing roller to enable the three rollers to carry out printing normally, then carrying out the inking of pearlescent ink, and then carrying out the processes of impressing, drying, die cutting, slitting, rolling and the like to finish the flexographic printing. The method for changing gravure pearlescent ink into online flexo printing changes the gravure printing mode into the flexo printing mode, so that online flexo printing production is completed by combining flexo printing and offset printing, and through the adjustment of printing ink and the change and combination of printing modes, the cost can be greatly saved, and the production efficiency and the yield are improved.)

1. A gravure pearl ink changes the method of the on-line flexography, including the following step, characterized by that:

s1: manufacturing a flexographic plate: the method of heating and pressurizing natural rubber or synthetic rubber material to support the printing plate by a model or the technology of forming plate pictures and texts by utilizing the photopolymerization process of monomers and polymers is adopted to manufacture the flexographic printing plate for flexographic printing;

s2: manufacturing a printing plate roller: fixing the prepared rubber flexible printing plate on the outer side of the roller in a bonding mode, and simultaneously ensuring that two ends of the rubber flexible printing plate are in seamless contact on the outer side of the roller to form a printing plate roller;

s3: selecting an anilox roller: firstly, estimating and selecting anilox rollers with the number of lines per inch to meet the ink amount of a print according to the inking areas of various colors of pictures and texts of a printed matter by daily experience, and secondly, observing the hue, saturation and the like of each color print in the primary plate correcting overprinting process according to the ink absorption amount of a printing material, and selecting a proper anilox roller;

s4: replacing the gravure printing unit: because the spreading printing of the pearl ink belongs to gravure printing, and the subsequent printing belongs to offset printing, different printing modes must be finished by different processes, the production of a single process and multiple processes inevitably causes various cost increases, and the rejection rate is increased, so that an intaglio printing unit on a printing unit is replaced by a flexographic printing unit;

s5: adding an offset printing unit: an offset printing unit which works in cooperation with the flexographic printing unit is added on the flexographic printing unit of the printing equipment, and transfer printing is carried out through the offset printing unit, so that the production efficiency and the yield can be improved;

s6: printing operation: the method comprises the following steps of firstly carrying out coil feeding and paper feeding, then carrying out adjustment and deviation rectification on a printing material to ensure subsequent normal feeding, then adjusting the pressure between a printing plate roller and an anilox roller and an offset printing roller to enable the three rollers to carry out printing normally, then carrying out the inking of pearlescent ink, and then carrying out the processes of impressing, drying, die cutting, slitting, rolling and the like to finish the flexographic printing.

2. The method of gravure pearlescent ink re-wiring flexography as claimed in claim 1, wherein: the method for supporting the printing plate by heating and pressurizing natural rubber or synthetic rubber materials by using the model comprises the steps of firstly manufacturing a metal original plate, namely a metal relief printing plate, then manufacturing a resin intaglio (casting template) by using thermosetting resin (such as phenolic resin), finally heating and pressurizing on a hot press to manufacture an original rubber plate, and then grinding the original rubber plate to form the flexible printing plate.

3. The method of gravure pearlescent ink re-wiring flexography as claimed in claim 1, wherein: the technology for forming the plate graph and text by utilizing the photopolymerization process of the monomer and the polymer comprises the steps of firstly forming a solid photosensitive resin plate by a protective film, a photosensitive resin layer, an adhesive layer, a plate base and a protective layer, and then completing the manufacturing of the photosensitive resin flexible plate through negative preparation, back pre-exposure and main exposure processes.

4. The method of gravure pearlescent ink re-wiring flexography as claimed in claim 1, wherein: and the anilox roller is matched with the flexo-printing pearl ink.

5. The method of gravure pearlescent ink re-wiring flexography as claimed in claim 1, wherein: the pearlescent ink is firstly conducted to an anilox roller in an ink groove, the pearlescent ink is transferred to a flexible plate roller by the anilox roller, a printing pattern is transferred to an offset printing roller by the flexible plate roller, and finally the pattern is printed on a printing stock by the offset printing roller.

Technical Field

The invention relates to the technical field of product printing processes and equipment, in particular to a method for changing gravure pearlescent ink into online flexo printing.

Background

With the continuous development of the printing industry, various printing modes and printing processes are developed, and a plurality of new elements are added to printing equipment, printing processes and the like on the basis of the tradition. The original gravure and flexo printing belong to two completely different printing modes, through continuous development, the two modes with different attributes are softened, the finally achieved effect is the same, and meanwhile, the cost can be saved. For the printing product with the pearly luster base, the spreading printing of pearly luster ink is required before the printing and coloring, and then the coloring printing is carried out. Because the spreading printing of the pearl ink belongs to gravure printing, and the subsequent printing belongs to offset printing, different printing modes must be finished by working procedures, so that the production of single working procedure and multiple working procedures inevitably causes various cost increases, and the rejection rate is increased. For the flat paper printing, the printing speed has obvious difference, the production efficiency of the single intaglio printing is about 5000 sheets/h, the printing production efficiency of the offset printing is about 10000 sheets/h, and the difference is two times of the production efficiency, so that the offset printing cannot be recognized by production enterprises.

Therefore, we propose a method of changing gravure pearlescent ink into line flexo printing so as to solve the problems mentioned above.

Disclosure of Invention

The invention aims to provide a method for changing gravure pearlescent ink into online flexo printing, which aims to solve the problems of high production cost, high rejection rate and low production efficiency of the existing gravure printing mode in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a gravure pearl ink line-changing flexible printing method comprises the following steps:

s1: manufacturing a flexographic plate: the method of heating and pressurizing natural rubber or synthetic rubber material to support the printing plate by a model or the technology of forming plate pictures and texts by utilizing the photopolymerization process of monomers and polymers is adopted to manufacture the flexographic printing plate for flexographic printing;

s2: manufacturing a printing plate roller: fixing the prepared rubber flexible printing plate on the outer side of the roller in a bonding mode, and simultaneously ensuring that two ends of the rubber flexible printing plate are in seamless contact on the outer side of the roller to form a printing plate roller;

s3: selecting an anilox roller: firstly, estimating and selecting anilox rollers with the number of lines per inch to meet the ink amount of a print according to the inking areas of various colors of pictures and texts of a printed matter by daily experience, and secondly, observing the hue, saturation and the like of each color print in the primary plate correcting overprinting process according to the ink absorption amount of a printing material, and selecting a proper anilox roller;

s4: replacing the gravure printing unit: because the spreading printing of the pearl ink belongs to gravure printing, and the subsequent printing belongs to offset printing, different printing modes must be finished by different processes, the production of a single process and multiple processes inevitably causes various cost increases, and the rejection rate is increased, so that an intaglio printing unit on a printing unit is replaced by a flexographic printing unit;

s5: adding an offset printing unit: an offset printing unit which works in cooperation with the flexographic printing unit is added on the flexographic printing unit of the printing equipment, and transfer printing is carried out through the offset printing unit, so that the production efficiency and the yield can be improved;

s6: printing operation: the method comprises the following steps of firstly carrying out coil feeding and paper feeding, then carrying out adjustment and deviation rectification on a printing material to ensure subsequent normal feeding, then adjusting the pressure between a printing plate roller and an anilox roller and an offset printing roller to enable the three rollers to carry out printing normally, then carrying out the inking of pearlescent ink, and then carrying out the processes of impressing, drying, die cutting, slitting, rolling and the like to finish the flexographic printing.

Preferably, the method for supporting the printing plate by heating and pressing the natural rubber or synthetic rubber material using the mold includes the steps of firstly making a metal original plate, i.e. a metal relief plate, then making a resin intaglio plate (a casting template) by using a thermosetting resin (such as a phenolic resin), finally making a rubber original plate by heating and pressing on a hot press, and then grinding the rubber original plate to form the flexographic printing plate.

Preferably, the technology for forming the plate graph and text by utilizing the photopolymerization process of the monomer and the polymer comprises the steps of firstly forming a solid photosensitive resin plate by a protective film, a photosensitive resin layer, an adhesive layer, a plate base and a protective layer, and then completing the manufacturing of the photosensitive resin flexible plate through negative preparation, back pre-exposure and main exposure processes.

Preferably, the anilox roller is matched with the flexo pearl ink.

Preferably, the pearlescent ink is firstly conducted to an anilox roller in an ink groove, the pearlescent ink is transferred to a flexographic roller by the anilox roller, a printing pattern is transferred to an offset printing roller by the flexographic roller, and finally the pattern is printed on a printing stock by the offset printing roller.

Compared with the prior art, the invention has the beneficial effects that: the method for changing gravure pearlescent ink into connection line flexo printing changes the gravure printing mode into the flexo printing mode, thereby changing the mode that the gravure printing and offset printing are completed in different working procedures in the working process, for the flat paper printing, the printing speed has obvious difference, the production efficiency of single gravure printing is about 5000 sheets/h, the printing production efficiency of offset printing is about 10000 sheets/h, the difference is two times of production efficiency, and the production efficiency can not be accepted by production type enterprises, therefore, the connection line flexo printing production is completed by combining the flexo printing and the offset printing, the cost can be greatly saved by adjusting the printing ink and changing and combining the printing mode, and the production efficiency and the yield are improved.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a technical scheme that: a gravure pearl ink line-changing flexible printing method comprises the following steps:

s1: manufacturing a flexographic plate: the method of heating and pressurizing natural rubber or synthetic rubber material to support the printing plate by a model or the technology of forming plate pictures and texts by utilizing the photopolymerization process of monomers and polymers is adopted to manufacture the flexographic printing plate for flexographic printing;

s2: manufacturing a printing plate roller: fixing the prepared rubber flexible printing plate on the outer side of the roller in a bonding mode, and simultaneously ensuring that two ends of the rubber flexible printing plate are in seamless contact on the outer side of the roller to form a printing plate roller;

s3: selecting an anilox roller: firstly, estimating and selecting anilox rollers with the number of lines per inch to meet the ink amount of a print according to the inking areas of various colors of pictures and texts of a printed matter by daily experience, secondly, observing the hue, saturation and the like of each color print in the primary plate correcting overprinting process according to the ink absorption amount of a printing material, and selecting the anilox rollers matched with flexo pearlescent ink;

s4: replacing the gravure printing unit: because the spreading printing of the pearl ink belongs to gravure printing, and the subsequent printing belongs to offset printing, different printing modes must be finished by different processes, the production of a single process and multiple processes inevitably causes various cost increases, and the rejection rate is increased, so that an intaglio printing unit on a printing unit is replaced by a flexographic printing unit;

s5: adding an offset printing unit: an offset printing unit which works in cooperation with the flexographic printing unit is added on the flexographic printing unit of the printing equipment, and transfer printing is carried out through the offset printing unit, so that the production efficiency and the yield can be improved;

s6: printing operation: the method comprises the steps of firstly carrying out coil feeding and paper feeding, then carrying out adjustment and deviation rectification on a printing material to ensure subsequent normal feeding, then adjusting the pressure between a printing plate roller and an anilox roller and an offset printing roller to enable the three rollers to carry out printing normally, then carrying out inking of pearlescent ink, conducting the pearlescent ink to the anilox roller in an ink tank, transferring the pearlescent ink to a flexible plate roller by the anilox roller, transferring a printing pattern on the offset printing roller by the flexible plate roller, finally printing the pattern on a printing stock by the offset printing roller, and then carrying out drying, die cutting, slitting, rolling and other processes to complete the flexible plate printing.