Classification of printing machinery and equipment: printing machinery into which five


Published on:

2019-01-03

Abstract: Printing machinery is a printing machine, binding machine, plate making machine and other auxiliary machinery and equipment collectively. These machinery and equipment have different properties and uses, therefore, the mechanical form of their composition is not exactly the same. Printing machinery can be basically divided into the following five categories: flat printing presses, circular presses, circular presses, letterpress printing machines, lithographic printing machines. Classification of printing machinery and equipment printing machinery into which five types of printing presses, can be classified according to the following five aspects: First, according to the layout type is divided into: gravure printing press, letterpress printing machine, lithographic printing machine, hole plate printing machine; Second

Classification of printing machinery and equipment: printing machinery into which five

Abstract: Printing machinery is a printing machine, binding machine, plate making machine and other auxiliary machinery and equipment collectively. These machinery and equipment have different properties and uses, therefore, the mechanical form of their composition is not exactly the same. Printing machinery can be basically divided into the following five categories: flat presses, round presses, round presses, letterpresses, lithographic presses.

 

The classification of printing machinery and equipment printing machinery into which five

There are many types of printing presses, which can be classified according to the following five aspects:

First, according to the layout type is divided into: gravure printing press, letterpress printing machine, lithographic printing machine, hole plate printing machine;

Second, according to the size of the paper specifications are divided into: lithographic or sheetfed printing presses, web printing presses;

Third, according to the number of printing colors: single-color printing presses, two-color printing presses, multi-color printing presses;

Fourth, according to the printing width is divided into "octavo printing press, quarto printing press, folio printing press, full-sheet printing press, super full-sheet printing press, etc.;

V. Although there are many ways to classify printing presses, but the core part of the printing press is the printing device embossing mechanism, therefore, according to the way to apply pressure, the general printing presses are divided into three types of flat, round, round and so on.

 

Gravure printing machine

The main feature of the gravure printing machine is that the graphic part of the plate is concave and the blank part is raised, which is the opposite of the layout structure of the letterpress printing machine. Machine in the printing of a single color, the first plate dipped in the ink tank rolling, the entire surface of the printing plate is then coated with ink printing machinery layer. Then, the printing plate surface belonging to the blank part of the ink layer scraped off, the raised part of the formation of blank, while the recessed part is filled with ink, the deeper the recessed place ink layer is also thicker. The machine transfers the ink of the recessed part to the printed matter through pressure, thus obtaining the printed matter.

Printing multi-color using overprinting method or indirect local inking method, so that the ink of various colors according to the need to distribute in the relevant part of the printing plate surface, printing multi-color basic printing principle and printing the same single color. Gravure printing presses used in the printing plates are mainly two kinds, one is photogravure, that is, photocopying plate; the other is engraved plate. Engraving plate engraving manual engraving, mechanical engraving and electronic engraving and other methods.

Flat-press type printing machine

The structure of a flat press is characterized by the flat shape of both the plate loading mechanism and the impression mechanism.

During printing, the platen oscillates reciprocally around the spindle to complete paper delivery and impressions. As the ink of the graphic part of the printing plate and the impression plate all contact at the same time, so the impression time is longer, the pressure exerted on the substrate is larger, so the ink color of the printed material is heavy, full of lines and strokes.

Flat press type printing machine, smaller, slow printing speed, low production efficiency, suitable for printing width.

Small printed materials, such as: greeting cards, invitations, book covers, envelopes, labels, etc.. This type of printing machine has a movable type version of the machine, copper and zinc plate proofing machine and disc machine.

Round press type printing machine

Also known as a platform printing machine, its structure is characterized by a flat plate mounting mechanism and a circular cylinder, commonly known as the impression cylinder.

When printing, the printing plate with the plate loading platform, relative to the impression cylinder for reciprocal movement, the impression cylinder is generally in a fixed position, with the substrate while rotating the impression, the pressure exerted by the impression cylinder on the substrate than the flat pressure flat type printing machine greater improvement, but due to the reciprocal movement of the plate table, the printing speed is limited, the production efficiency is not high. Mainly printing the body of the booklet. This type of printing machine: a rotary letterpress, two rotary letterpress printing machine, stop rotary letterpress printing machine, flat plate proofing machine.

Round press type printing machine

Also known as a rotary printing press, its structure features a cylindrical cylinder for both the plate loading mechanism and the impression mechanism, which is cylindrical in shape.

The plate loading mechanism, commonly known as the impression cylinder.

When printing, the impression cylinder carries the substrate, relative to the plate cylinder in the opposite direction while rotating and embossing. Since the contact time between the impression cylinder and the plate cylinder is shorter, the pressure on the substrate is smaller than that of a circular press.

A circular press uses the impression cylinder and the plate cylinder to make contact and make impressions without stopping, resulting in smooth movement, simple structure and fast printing speed. If the printing device is combined together and designed as a satellite or unit type printing machine, it can also be double-sided, multi-color printing, and high production efficiency. This type of printing press, currently the most used, there are lithographic printing presses, gravure printing presses, flexographic printing presses and printing books, newspapers, high-speed web presses, etc.. According to the layout type is divided into: letterpress, lithographic printing machine, gravure printing machine, hole plate printing machine.

Toppan Printing Machine

The letterpress is the oldest printing machine, which has a raised graphic part and a concave blank part on the surface of the printing plate. When the machine is working, the ink-coated rollers roll over the surface of the printing plate and the raised graphic part is coated with an even layer of ink, while the concave blank part is not coated with ink. The pressure mechanism of the ink is transferred to the surface of the print, thus obtaining a clear print and reproducing the desired print.

There are three main types of letterpress printing machines: flat, round and round.

The flat letterpress is also known as a flat press. It device printing plate plate and embossing mechanism are flat shape, work, the plate and embossing plate full contact, the machine once the total pressure is relatively large, the relative embossing time is longer. This kind of printing machine requires a flat plate and impression plate, the printing area is not large; round press letterpress printing machine, also known as platform printing machine, it device plate plate for the flat shape, while the impression mechanism is a round cylinder. When the machine works, the plate table reciprocating movement, printing speed is limited to a certain extent, so the output is not high; circular press letterpress, also known as rotary printing machine, it device plate table and impression mechanism are round cylinder. When the machine is working, the impression cylinder with the printed matter movement, and the plate cylinder in contact with each other. The impression cylinder and plate cylinder continuously rotate at high speed, so the productivity is high.

Lithographic printing machine

Lithographic printing machine printing plate surface of the graphic part and the blank part almost in the same plane. It uses the principle of water and oil repulsion, so that the graphic part of the water-resistant hydrophilic, the blank part of the oil-resistant hydrophilic and non-stick ink, under the pressure of the inking part of the ink transfer to the surface of the printed matter, so as to complete the printing process.

After the use of indirect printing method, lithographic printing presses developed rapidly, more varieties, such as office printing machinery micro offset presses, large, multi-color, high-speed books and magazines offset rotary presses, for flat sheets of paper or webs, single-sided printing or double-sided printing lithographic presses. Among them, monochrome offset presses and web offset presses are representative. Lithographic presses have been widely used electronic computer control devices, increasingly advanced in technology. Plate making equipment has also developed to the use of electronic color separation machine, and the widespread use of pre-coated photographic plates.

Screen printing machine

Screen printing machine belongs to the more representative printing equipment in the hole plate printing machine, its printing plate is a silk screen woven by real silk and other materials, crisscrossing, warp and weft. There are many kinds of screen printing machines such as flat, curved, forming, printing and dyeing, printing circuit and new rotary screen printing machines. Among them, the new rotary screen printing machine has a higher speed and productivity it is characterized by the screen mounted on a roller.

The cylinder, the ink is poured in the cylinder. When the machine works the roller rotates and the rubber squeegee prints the pattern onto the printed matter quickly.

The material used to make the screen, in addition to real silk, can also be used nylon wire, copper wire, steel wire or stainless steel wire. Screen printing machine application of the principle of hole plate printing originated in the ancient stencil printing. Hole plate printing has a transcribed version, openwork version of the spray and screen printing and other forms.

Screen printing was initially done by hand, when there was only a plate holder, a screen plate and a stencil. By the 1950s screen printing to achieve mechanization, automation. Roller screen printing machine printing ink, suitable for printing thick ink layer of printed materials, can be printed on a variety of paper, glass, wood, metal, ceramic, plastic or cloth, available in a variety of inks, including metallic ink can be conductive.