Printing machinery5

2022-03-12 17:54

Printing machinery

Printing machinery is the general name of machines and equipment used to produce printed matter. Its function is to print the layout

The ink of the text part is transferred to the surface of the substrate.

The printing press is generally composed of paper feeding, ink feeding, printing, paper receiving and other devices. The lithographic press also has a water delivery device. There are many types of printing presses, which can be classified according to the following five aspects:

1、 According to the layout type, it is divided into: relief printing machine, lithographic printing machine, gravure printing machine and hole printing machine;

2、 According to the size and specification of paper, it is divided into: lithographic paper or sheet fed printing machine, web printing machine;

3、 According to the number of printing colors, it is divided into: monochrome printing press, two-color printing press and multi-color printing press;

4、 According to the printing format, it is divided into "eight open printing machine, four open printing machine, folio printing machine, full sheet printing machine, ultra full sheet printing brush machine, etc;

5、 Although there are many classification methods of printing presses, the core part of the printing press is the embossing mechanism of the printing device. Therefore, according to the way of applying pressure, the printing press is generally divided into flat type, round type, round type and oblique type.

Flat type

The structural feature of flat press is that the plate loading mechanism and embossing mechanism are planar.

During printing, the embossing lithography swings back and forth around the main shaft to complete paper feeding and embossing. Because the ink of the graphic part of the printing plate is in full contact with the embossing lithography at the same time, the embossing time is long and the pressure on the substrate is large, so the ink color of the printed matter is thick and the lines and strokes are full.

The flat press flat printing machine has the advantages of small volume, slow printing speed and low production efficiency. It is suitable for printing printed materials with small format, such as greeting cards, invitations, book covers, envelopes, labels, etc. This kind of printing machine includes movable type typesetter, copper zinc plate proofing machine and disc machine.

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