Method for UV (Ultra-Violet Ray) lustering of offset press through hollowing lining papers

A backing paper and offset printing machine technology, applied to printing machines, printing, general parts of printing machinery, etc., can solve the problems of low work efficiency, high production cost, and low durability of blankets, and achieve convenient and fast manufacturing. Low cost, the effect of reducing printing costs

Inactive Publication Date: 2015-04-29
SICHUAN JINSHI PRINTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for UV coating of an offset printing machine by hollowing out the backing paper. The technical problems to be solved are high production cost, low work efficiency and poor durability of the blanket in the existing UV coating method for offset printing machines The problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for UV varnishing of an offset press by hollowing out liner paper, comprising the steps of:

[0022] Step 1: Select 3 sheets of padding paper with a width of 800mm and a length of 1100mm, and the thickness of each padding paper is 0.3mm.

[0023] Step 2: cutting off the area of ​​the liner paper corresponding to the non-image part of the printed matter to form a hollow, leaving the printed area.

[0024] Step 3: According to the specifications and thickness of the printed paper, adjust the pressure of the ink roller between each printing group, and install the color sequence printing plate.

[0025] Step 4: Place the cut liner paper on the printing area on the blanket correspondingly, and then install the liner paper together with the blanket on the blanket cylinder and fix and lock them.

[0026] Step 5: Select the anilox roller, after adjusting the printing pressure, start the varnish pump to pump the UV varnish into the varnish chamber.

[0027] Step 6: Ad...

Embodiment 2

[0030] The main difference between this embodiment and Embodiment 1 is that: 6 sheets of liner paper with a width of 750 mm and a length of 1000 mm are selected, and the thickness of each liner paper is 0.1 mm.

Embodiment 3

[0032] The main difference between this embodiment and Example 1 is that in the step 1, four sheets of liner paper with a width of 787 mm and a length of 1092 mm are selected, and the thickness of each liner paper is 0.2 mm. for the best implementation.

[0033] According to the thickness of the printed paper and the range value of the printing pressure specified by the equipment, choose the liner paper that can withstand the printing pressure range close to this, to avoid the dot expansion caused by too high pressure, and the imprint will be blurred and printed inaccurately if the pressure is too small. Affect the quality of printed products; indirect printing is carried out under the action of printing pressure between the printing plate cylinder, the rubber cylinder and the impression cylinder, and the cushion paper is placed under the blanket, because the required value of the blanket for the cushion paper must be controlled within Within the error range of 0.015mm, if the...

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PUM

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Abstract

The invention relates to a method for UV (Ultra-Violet Ray) lustering of an offset press through hollowing lining papers, which has advantages of low production cost, high efficiency and improvement of service life of rubber blankets. The method specifically comprises the following steps of: choosing 3-6 pieces of lining papers, wherein the width of the lining papers is 750-800mm, the length is 1000-1100mm and the thickness of each piece of lining paper is 0.1-0.3mm; cutting the areas of the lining papers where corresponded to non-image parts of a print to form hollows, and reserving printing areas; according to the specification and the thickness of the papers of the print, calibrating the pressures among the ink rollers of all printing units, and then installing color sequence printing plate; flatly paving and correspondingly arranging the cut lining papers on the printing area of the rubber blanket, then installing the lining papers and the rubber blanket on a rubber roller, and then fixing and locking; choosing an anilox roller, starting a gloss oil after calibrating printing pressure, and then pumping UV gloss oil to a gloss oil chamber; adding ink to a printing color unit, then calibrating the pressures of the ink rollers and the printing pressure among the three rollers, and then starting the offset press.

Description

technical field [0001] The invention relates to the technical field of printing, in particular to a method for UV glazing of an offset printing machine by hollowing out a liner paper. Background technique [0002] In China, offset printing is an absolutely dominant printing method. Due to its fast printing speed, relatively stable printing quality, and short printing cycle, etc., [0003] Offset printing is a kind of lithographic printing, which is a printing method in which the graphics and text on the printing plate are transferred to the substrate by means of rubber (rubber cloth). The blanket plays an irreplaceable role in printing, such as: it can well compensate for the unevenness of the surface of the substrate, fully transfer the ink, reduce the transfer of water from the printing plate to the substrate, and so on. [0004] When producing products on offset printing machines, there are two existing methods that can meet the full-page UV coating requirements. One is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41F23/08
Inventor 李海坚
Owner SICHUAN JINSHI PRINTING
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