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Dampening device of lithographic machine

A technology of printing presses and lithography, applied in the direction of lithographic rotary printing machines, printing machines, rotary printing machines, etc., can solve the problems of increasing the cost of printing enterprises, and achieve the effect of reducing the adhesion of paper powder and reducing costs

Inactive Publication Date: 2010-09-29
上海紫明印刷机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For most printing companies, if they want to print with two different dampening methods for different paper qualities, they must be equipped with two dampening devices at the same time, which greatly increases the cost of printing companies

Method used

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  • Dampening device of lithographic machine
  • Dampening device of lithographic machine
  • Dampening device of lithographic machine

Examples

Experimental program
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Effect test

Embodiment Construction

[0017] Such as figure 1 As shown, the dampening device of the lithographic printing machine of the present invention is an improvement on the alcohol dampening device, and the improvement is to remove the intermediate roller, and put the water wool cover 601 on the bucket roller 501 and the water roller 504 , 602. The specific method is to select a water bucket roll with a diameter 4.5mm smaller than that of the alcohol dampening device, and then put on a 140-pin water fleece sleeve 601, and select a water roll with a diameter smaller than that of the alcohol dampening device. The little 4.5mm impingement roller of diameter, and put on it the velvet cover 602 of 126 needles.

[0018] Putting the water fleece cover 601 on the water bucket roller 501 can make the water dampening solution pass from the water bucket 101 to the metering roller 502 smoothly, and putting the water fleece cover 602 on the water roll 504 can transfer the water on the printing plate The paper powder i...

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PUM

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Abstract

The invention discloses a dampening device of a lithographic machine. The dampening device comprises a bailer, a water foundation roller partly arranged in the bailer, a metering roller contacted with the water foundation and a form damping roller one side of which is connected with the metering roller and the other side of which is contacted with a dampening vibrator, wherein the form damping roller is contacted with a plate cylinder, and the water foundation roller and the form damping roller are sleeved with molletons. In the invention, the printing way of water dampening can be realized by slightly changing an alcohol dampening device, thus printing enterprises do not have to allocate specific water dampening machines, thereby saving the cost of the printing enterprises.

Description

technical field [0001] The invention belongs to the technical field of printing machines, and relates to a planographic printing machine, in particular to a dampening device of a planographic printing machine. Background technique [0002] Double-sided lithographic printing machines mainly print books and periodicals. The processing fee of books and periodicals in the industry is very low, and the quality of paper varies greatly, and some papers have a lot of paper powder. [0003] Offset printing is based on the principle of oil-water incompatibility to complete ink transfer printing. The lithographic printing machine is equipped with a dampening device, which forms the graphic and blank part on the same flat printing plate (actually, the difference between the graphic and blank part of the printing plate is only 5-8um). During printing, the dampening device first supplies dampening liquid to the printing plate, and then the ink supply device supplies ink to the printing p...

Claims

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Application Information

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IPC IPC(8): B41F7/24
Inventor 陈勇吴杰
Owner 上海紫明印刷机械有限公司
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