Classification of printing machinery

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A brief introduction to the classification of printing machinery there are many types of printing machines, which can be classified according to the following five aspects:

first, according to the layout type, they are divided into relief printing machine, lithographic printing machine, gravure printing machine and hole printing machine

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

III. according to the number of printing colors, it is divided into: monochrome printing machine, two-color printing machine that uses these chemical reactions to chemically modify starch, and multi-color printing machine

IV. according to the printing format, it is divided into eight open printing machines, four open printing machines, folio printing machines, full sheet printing machines, ultra full sheet printing machines, etc

v. although there are many classification methods for printing machines, the core part of the printing machine is the imprinting mechanism of the printing device. Therefore, according to the way of applying pressure, the printing machines are generally divided into three types: flat, round and round

flat press flat press the structural feature of the flat press flat press is that both the plate loading mechanism and the imprinting mechanism are planar

during printing, the imprint lithography plate swings back and forth around the spindle to complete paper feeding and imprinting. As the printing plate (2) regularly changes the engine oil, the ink in the graphic part and the lithographic plate are all in contact at the same time, so the stamping 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 printing machine is small in size, slow in printing speed and low in production efficiency. It is suitable for printing small format printed materials, 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

circular platen printer

also known as platform printer, its structural feature is that the plate loading mechanism is planar, and the imprinting mechanism is a circular cylinder, commonly known as the imprinting cylinder

during printing, the printing plate moves back and forth with the plate loading platform relative to the imprinting cylinder. The imprinting cylinder is generally in a fixed position and rotates with the substrate while imprinting. The pressure exerted by the imprinting cylinder on the substrate is greater than that of the flat press. However, due to the reciprocating motion of the plate table, the printing speed is limited and the production efficiency is not high. The main body of printed books and periodicals. Such printing machines include: one rotary relief printing machine, two rotary relief printing machine, stop rotary relief printing machine, lithographic proofing machine, etc

circular press

is also called rotary printing machine. Its structural feature is that both the plate loading mechanism and the imprinting mechanism are cylindrical cylinders. The cylindrical printing machine plate loading mechanism is commonly known as the plate printing cylinder

during printing, the imprint cylinder carries the substrate and rotates in the opposite direction to the plate cylinder while imprinting. Due to the short contact time between the impression cylinder and the plate cylinder, the pressure on the substrate is smaller than that of the circular press

the circular press uses the continuous contact between the impression cylinder and the plate cylinder to imprint, with stable movement, simple structure and fast printing speed. If the printing devices are combined and designed into a satellite or unit type printing machine, it can also carry out double-sided and multi-color printing, with high production efficiency. At present, this kind of printing machine is most used, including lithographic printing machine, gravure printing machine, flexographic printing machine, and high-speed web printing machine for printing books, periodicals and newspapers

according to the layout type, it is divided into relief printing machine, lithographic printing machine, gravure printing machine and hole printing machine

relief printing machine

relief printing machine is the oldest printing machine. The graphic part of the printing plate surface is raised and the blank part is concave. When the machine is working, the rubber roller with ink on the surface rolls over the printing plate surface, and the convex graphic part is stained with a uniform ink layer, while the concave blank part is not stained with ink. The pressure mechanism transfers the ink to the surface of the printed matter, so as to obtain a clear impression and copy the required printed matter

relief printing machines mainly have three types: flat press, round press and round press. Flat press digital printing machine flat relief printing machine is also called flat press printing machine. The plate table and the imprinting mechanism of the printing plate are planar. When working, the printing plate is in full contact with the imprinting plate. The total pressure borne by the machine at one time is relatively large and the relative imprinting time is longer. This kind of printing machine requires that the printing plate and the embossing plate be flat, and the printing format is not large; The circular platen relief printing machine is also called platform printing machine. It has a flat platen for printing plates, and the impression mechanism is a circular cylinder. When the machine is working, the plate table moves back and forth, and the printing speed is limited, so the output is not high; The rotary relief printing machine is also called rotary transfer printing brush machine. It is equipped with a circular cylinder for both the plate table and the embossing mechanism. When the machine is working, the impression cylinder moves with the printed matter and contacts with the plate cylinder. The embossing cylinder and the plate cylinder rotate continuously and rapidly, so the productivity is high

lithographic press

the graphic part of the printing plate surface of the lithographic press is almost on the same plane as the blank part. It uses the principle that water and oil repel each other to make the graphic part resistant to water and oil, and the blank part resistant to oil. Although the standard also allows the ink to be transferred from the inking part to the surface of the printed matter under the pressure without taking the lead in the sample water, so as to complete the printing process

after the indirect printing method was adopted, the lithographic press developed rapidly with many varieties, such as the micro offset press for office, the large, multi-color and high-speed offset rotary press for books, newspapers and magazines, and the lithographic press for flat paper or web paper, single-sided or double-sided printing. Among them, monochrome Offset Press and web offset press are representative. Computer control devices have been widely used in lithographic printing machines, and the technology is becoming more and more advanced. Plate making equipment has also developed to use electronic color separators, and widely used precoated photosensitive plates

gravure printing press

the main features of gravure printing press are that the graphic part on the printing plate is concave and the blank part is convex, which is just opposite to the layout structure of the gravure printing press. When printing monochrome, the machine first rolls the printing plate in the ink tank, and the entire printing plate surface is then coated with an ink layer. Then, the ink layer on the blank part of the plate surface is scraped off, the convex part forms a blank, and the concave part is filled with ink. The deeper the concave part is, the thicker the ink layer is. The machine transfers the ink of the concave part to the printed matter through the pressure, so as to obtain the printed matter

when printing multi-color, overprint or indirect local inking method is adopted to make the inks of various colors distributed on the relevant parts of the printing plate surface as required. The basic printing principle of multi-color printing is the same as that of monochrome printing. There are mainly two kinds of printing plates used in gravure printing press. One is photographic gravure, that is, photowriting plate; The other is engraving. The engraving of engraving plate includes manual engraving, mechanical engraving and electronic engraving

silk screen printing brush machine

silk screen printing brush machine belongs to the representative printing equipment of hole plate printing machine. Its printing plate is a crisscross, longitude and latitude clear silk woven from real silk and other materials. We have produced many kinds of silk printing machines, such as plane, curved surface, forming, printing and dyeing, printed circuit and new-type rotary. Among them, the speed and productivity of the new rotary silk printing machine are relatively high. Its characteristic is that the silk is installed on the drum and the ink is poured in the drum. When the machine is working, the drum rotates, and the rubber doctor blade quickly prints the pattern on the printed matter

in addition to real silk, nylon wire, copper wire, steel wire or stainless steel wire can also be used to make silk. The principle of hole printing applied by screen printing brush machine originated from ancient template printing. There are many forms of hole printing, such as transcribed plate, stencil printing and silk printing

silk printing was initially operated manually. At that time, there was only one plate holder, one silk plate and one template. It was not until the 1950s that silk printing realized mechanization and automation. The roller type silk printing machine has a large amount of ink when printing. It is suitable for printing printed materials with thick ink layer. It can be printed on various paper, glass, wood, metal, ceramics, plastics or cloth. It can use a variety of inks, including conductive metallic inks

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