CN107672329B

CN107672329B - Method for improving printing effect of silk screen product

Info

Publication number: CN107672329B
Application number: CN201710975121.1A
Authority: CN
Inventors: 孙叶; 朱昕鹏; 刘治新; 王建宏
Original assignee: Jiangsu Dareglobal Printing Co ltd
Current assignee: Jiangsu Dareglobal Printing Co ltd
Priority date: 2017-10-19
Filing date: 2017-10-19
Publication date: 2020-07-03
Anticipated expiration: 2037-10-19
Also published as: CN107672329A

Abstract

The invention discloses a method for improving the printing effect of a silk screen product, which belongs to the technical field of printing and comprises the following steps: 1) performing prepress file processing, 2) filling a process line on a screen, 3) performing product silk-screen printing, 4) performing die cutting to remove the process line, wherein the process line is filled at the tail end of the screen and is positioned outside the product die cutting line, the width of the process line is 2-4mm, the silk-screen printing ink is diluted by a diluent to 5.5-6.5P year round, then stirring, heating and keeping the diluted ink at a constant temperature for 1 hour for later use, the specification of the screen cloth is 300 meshes, the printing angle is 21 degrees, and a stirrer, a heating rod and a thermometer are arranged in the heating device to keep the silk-screen printing ink at a constant temperature of 35-40 ℃ in the constant temperature device. The process of the invention enables the pattern effect of the printed matter to reach an ideal state, the tail part of the printed matter does not have the phenomenon of rough selvedge unclean, the workload of frequently wiping the screen printing plate by an operator due to the problem of rough selvedge unclean of the tail part of the printed matter is reduced, the material is saved, and the production efficiency is also improved.

Description

Method for improving printing effect of silk screen product

Technical Field

The invention relates to a product packaging printing process, in particular to a method for improving the printing effect of a silk screen product, and belongs to the technical field of printing.

Background

The surface printing of the traditional product packaging (plastic, paper and other materials) generally adopts a screen printing process. The silk-screen printing product has the characteristics of bright color, rich layers, vivid scenery, clear pictures and texts and the like, in the silk-screen printing process, when a silk-screen scraper scrapes the tail of a screen plate, redundant ink cannot be scraped completely, the phenomenon that the tail of the printing plate receives ink and is not smooth frequently occurs, so that quality problems of virtual edges, rough edges, sawtooth edges and the like occur on the printed product, and the silk-screen printing product is particularly prominent when solvent ink is adopted for silk-screen printing. In industrial operation, the screen printing plate is scrubbed to reduce the phenomenon of poor ink collection of the printing plate tail, but the effect is not good.

With the continuous innovation and development of product packaging, the screen printing process is widely applied to a plurality of product packaging. In actual production, in the production process of using solvent ink for screen printing, the tail part of the printing plate surface of a printing product often has the phenomenon of rough edges and poor cleanness due to poor ink collection at the tail end of a screen printing plate, although an operator frequently wipes the printing plate, the problem cannot be obviously improved, and the quality and the production efficiency of a screen printing product are seriously influenced. Therefore, there is a need for research on the selection of the ink and the plate making process.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a method for improving the printing effect of a silk screen product, and solves the problems that the ink collected at the tail of a printing plate is not smooth and is easy to generate burrs.

In order to achieve the purpose, the invention adopts the following technical scheme:

firstly, processing a prepress file;

secondly, filling process lines on the screen;

thirdly, silk-screen printing of the product;

finally, the process line is removed by die cutting.

The method comprises the following steps of printing a product on a screen, wherein the tail part of the screen is subjected to process adjustment, namely a process line is added at the tail part of the screen, the process line is positioned outside a product die cutting line, and residual ink at the tail end of the screen is transferred to the process line, so that a printed matter pattern reaches a required ideal state and can be finally removed as a waste edge through die cutting.

Specifically, the width of the process line is 2-4 mm.

In one embodiment, in order to meet the requirements of leveling property, surface tension and adhesive force of the printing ink and be suitable for screen printing, process test comparison of the printing ink with different concentrations is carried out, the viscosity of the screen printing ink is diluted to 5.5-6.5P by adopting a diluent, and the screen printing process can be better suitable for the process.

In one embodiment, in order to further improve the fluidity and transfer performance of the ink, so that the ink can fully flow and transfer in the screen printing process and ensure that the surface of a product is uniform and has no wire drawing phenomenon after printing, stirring is carried out before the ink is used for 1 hour, a 300-mesh screen cloth plate roller is selected to finish the transfer of the screen printing ink in the screen printing process, and the printing angle is 21 degrees.

In one embodiment, the screen printing ink after stirring is placed in a thermostat device in which a stirrer, a heating rod and a thermometer are installed, so that the screen printing ink is kept at a constant temperature of 35-40 ℃ in the thermostat device to achieve the drying speed of the screen printing ink in screen printing and to increase the fluidity of the ink.

Specifically, the constant temperature device is heated by water bath, the number of the heating rods is 2, and the power of the heating rods is 2 KW.

The invention has the beneficial effects that:

the method has strong operability, and a process line is added at the tail end of the screen printing plate through the treatment of the prepress file, so that the process line is positioned outside a product die cutting line, the pattern effect of a printed matter reaches an ideal state, and the phenomenon of rough edges which are not polished and cleaned does not occur at the tail part of the printed matter.

The workload of frequently wiping the screen printing plate due to the problem that the tail part of a printed matter is not polished and burrs are reduced, materials are saved, and the production efficiency is improved.

Detailed Description

To more clearly illustrate embodiments of the present invention or solutions in the prior art, the present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these examples provide those skilled in the art with an understanding of the teachings of the present invention.

Unless otherwise defined, terms (including technical and scientific terms) used herein should be construed to have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms used herein should be interpreted as having a meaning that is consistent with their meaning in the context of this specification and the relevant art, and should not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

The method for improving the printing effect of the silk screen product disclosed by the invention is verified when the packaging material of the cigarette product is subjected to silk-screen printing by using solvent ink.

First, the conventional processing of prepress documents is performed.

Secondly, a process line with the width of 2-4mm is added at the tail part of the screen printing plate, and the process line is positioned outside a product die cutting line.

And thirdly, performing a conventional silk-screen printing process of the product, and transferring residual ink at the tail end of the screen plate to the process line (burrs and unclean phenomena appear on the process line) when a silk screen scraper scrapes the tail end of the screen plate, so that the pattern of the printed matter reaches a required ideal state.

And finally, removing the process line as a waste edge by using a die cutting machine to enable the edge of the pattern of the product to be smooth.

In the aspect of ink selection, in order to meet the requirements of ink flow smoothness, surface tension and adhesive force, the ink with the viscosity of 5.5-6.5P is selected (the ink is diluted by a diluent), so that the ink can be fully transferred in a screen printing process, and the uniform surface and no wire drawing phenomenon of a product after printing are ensured. Before use, the ink was stirred for 1 hour to improve the ink fluidity.

In order to overcome the defect that the printing ink cannot be sufficiently transferred in the screen printing process, the characteristics of the screen printing process are analyzed, the mesh number of the mesh cloth has a large influence on the transfer performance of the printing ink, and the 300-mesh screen roller can meet the problem that the printing ink can be sufficiently transferred by carrying out printing tests on various mesh cloths with different mesh numbers.

In order to improve the drying speed and the fluidity of the ink, the ink is stirred, heated and kept at a constant temperature before printing, 2 heating rods with 2KW are adopted to heat in water, and an ink barrel is placed in a hot water bath, and the temperature of the ink barrel is controlled to be 35-40 ℃.

The comparison shows that the method can obviously improve the quality of the silk-screen printing product, the yield is improved by more than 5 percent, the machine halt is reduced by more than 30 percent, the printing surface effect is uniform and consistent, no crease, no punch mark, no scratch and no wire drawing phenomenon exist, and the tail part of the printed matter does not have the phenomenon of rough edge which is not smooth and clean.

While the invention has been described herein with reference to specific aspects, features and illustrative embodiments of the invention, it will be appreciated that the invention is not thus limited in its application, but extends to and encompasses numerous other variations, modifications and alternative embodiments, as will suggest themselves to those of ordinary skill in the art to which the invention pertains, based on the disclosure herein. Accordingly, any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method of enhancing the printing effect of a screen product, comprising the steps of:

1) the pre-press file processing is carried out,

2) the process line is added on the screen printing plate,

3) the product is processed by the silk-screen printing method,

4) the die cutting removes the processing line, its characteristic is: the process line is filled at the tail end of the screen printing plate and is positioned outside a product die cutting line, the width of the process line is 2-4mm, the silk-screen printing ink is diluted by a diluent until the viscosity is 5.5-6.5P, then the diluted printing ink is stirred for 1 hour for later use, the specification of the anilox roller is 300 meshes, the printing angle is 21 degrees, and when a silk screen scraper scrapes the tail end of the screen printing plate, the residual printing ink at the tail end of the screen printing plate is transferred to the process line.

2. The method of enhancing the printing of a screen product of claim 1, wherein: and placing the stirred screen printing ink in a constant temperature device, wherein a stirrer, a heating rod and a thermometer are arranged in the constant temperature device, so that the screen printing ink is kept at a constant temperature of 35-40 ℃ in the constant temperature device.

3. The method of enhancing the printing of a screen product of claim 2, wherein: the constant temperature device is used for heating in a water bath, the number of the heating rods is 2, and the power of the heating rods is 2 KW.