18岁末年禁止观看免费国产

<form id="wuclf"><tr id="wuclf"><kbd id="wuclf"></kbd></tr></form>
<progress id="wuclf"></progress>

<rp id="wuclf"></rp>
  • news

    » Home » News » News » Printing Machine Introduction and Its Development

    Printing Machine Introduction and Its Development

    Date:2017-09-29 01:32:35 Visit:1368

    Modern printing machine are usually made up of such institutions as loading, inking, embossing, conveying paper (including folding). Its working principle is: first, to be printed words and images to make plate, installed on the printer, then by artificial or printing ink coating on the plate there is words and images, and then directly or indirectly, transfer to the paper or other substrates, such as textile, metal, plastic, leather, wood, glass and ceramics), so as to reproduce the same as the plate of the print。


    Before the 1950s, traditional letterpress printing was dominant in the printing industry, and the printing press was dominated by letterpress printing presses. However, the printing process of lead alloy is the disadvantage of high labor intensity, long production cycle and pollution environment. Since the 1960s, the lithographic process with short cycle and high productivity has been developed and developed, and the offset printing of lead alloy has been replaced by offset printing. Soft relief printing, hole printing, electrostatic printing, inkjet printing, etc., are also developed in packaging, printing and printing. The world printing machinery has made great progress since the 1980s. Over the past 20 years, the development of printing machinery has gone through three stages:


    The first stage is the beginning of 1980 s to the early 90 s, this phase is the heyday of offset printing process development. This period of sheet-fed offset printing speed for the largest 10000 printed/hour. A four-color printing press pre-adjustment preparation time is usually about 2 hours. The automatic control of the printing presses mainly focuses on automatic paper, automatic paper collecting, automatic cleaning, automatic detection of ink color, automatic control of ink and the set of remote control. In addition to the monochrome, double color conversion, this period also has almost every sheet-fed offset press manufacturers in four-color machine manufacturing capabilities, most manufacturers are able to make paper flip agencies, double-sided printing。


    The second phase was the early 1990s to the late 20th century. In the 1990s, the international printing machinery design and manufacturing level took a big step forward. Compared with the first stage of the model, a new generation of models to further improve the speed of the, by the 10000 printed/hour to 15000 / hour, prepress preset adjustment time also by the first phase of the 2 hours shorten for 15 minutes. The automation and productivity of the machines have also been greatly improved。


    In the 21st century, printing machinery has ushered in a third stage of development. Sheet-fed offset press some models can reach 17000-18000 / hour, but manufacturers don't hankers after the printer printing speed increases, the largest but through the application of information technology, further shorten the prepress preparation time and replace live a time to pursue a higher production efficiency.

    Keywords in this article:
    18岁末年禁止观看免费国产

    <form id="wuclf"><tr id="wuclf"><kbd id="wuclf"></kbd></tr></form>
    <progress id="wuclf"></progress>

    <rp id="wuclf"></rp>