Talking about printing equipment

Printing machine

According to the different printing plates used, it is divided into letterpress printing machines, offset printing machines, gravure printing machines, stencil printing machines, special printing machines, etc. According to the embossing form, there are three basic types of flat press, round press and round press.

According to the form of the printing plate, the printing machine is divided into letterpress, offset, gravure and stencil printing presses; according to the plate and imprint structure, it is divided into flat press, round press and round press.

⒈Relief printing press: relief printing press

A machine that uses letterpress to complete the printing process. Such as business card machine (resin plate), type printing, zinc letterpress, set of numbers, etc.

⒉Planographic press: planographic press

A machine that uses lithography to complete the printing process. Such as multi-color machine, four-color machine, two-color machine, single color machine, fast printing machine, etc.

⒊Intaglio printing press: intaglio printing press

A machine that uses intaglio to complete the printing process. Such as glass bag printing of instant noodles, aluminum foil bag packaging of biscuits, etc.

⒋Screen printing machine: screen-process printing press

A machine that uses a silk screen to complete the printing process. Perforated printing: such as screen printing, circuit board printing, cloth printing, can printing, inscription printing, partial glazing, etc.

Classified by paper form

⒈Single-fed printing press: sheet-fed printing press uses a single-fed printing press.

⒉Web printing machine: roll-fed printing press; a printing press that uses roll paper.

Classification of press-printed structures

⒈Ping flat printing machine: platen press; the printing plate support body and the imprinting body are both flat printing machines`

⒉Round flat printing machine (flat-bed printing machine): flat-bed cylinder press; the printing plate support is flat, and the imprinting body is a cylindrical printing press.

⒊Stop-cylinder press: stop-cylinder press printing plate cooperates to reciprocate, when advancing, the impression cylinder rotates once, when returning, the impression cylinder stops rotating to complete a printing process.

⒋One-revolution printing press: single-revolution printing press; each time the printing plate table reciprocates once, the impression cylinder makes one revolution to complete a printing process.

⒌Two-revolution printing press: two-revolution printing press; a printing press that completes a printing process every time the printing plate moves back and forth

⒍Reversible printing press: a printing press that completes a printing process every time the impression cylinder rotates back and forth.

⒎Round pressing circular printing machine: rotary printing press The printing plate support body and the transfer body are all cylindrical, and when the printing process is completed, it is a printing press that is fully rotated.

Printing equipment is mainly composed of paper feeding device, printing device, paper delivery device and other devices. The following is a detailed introduction to the four major categories of printing characteristic equipment.

Paper feeding device

The paper feeding device is a device for installing, continuously feeding and replacing roll paper, mainly including: roll paper support device, paper feeding device, paper receiving device (single sheet, roll)

a. The roll paper support device mostly adopts the form of the center support of the roll paper:

⑴Mandrel for roller support

①Taper mandrel.

②Expandable mandrel.

⑵There is no mandrel supporting device. Mainly used for large printing presses.

⑶ Mandrel support seat.

b. Paper feeding device. During the printing process, the diameter of the roll paper is gradually reduced until it needs to be replaced with a new roll paper.

⑴ The form of the upper paper arm. According to the number of rolls that can be installed on the paper loading device, it can be divided into three types, namely single-arm type, double-arm type and three-arm type

⑵ Pneumatic paper feeding mechanism. The pneumatic paper loading mechanism is powered by compressed air, and the paper loading arm is driven by a pneumatic device to realize the lifting and lowering of the paper loading arm.

⑶ Electric paper feeding mechanism. This mechanism is composed of a motor and a mechanical transmission device

c. When using roll paper for long-version printing, it is not only required to replace the roll paper without stopping the machine, but also to stick it under the condition of the new and old paper tapes at the same speed to complete the whole process of changing the paper. For this reason, Generally set up non-stop automatic paper splicing device.

Printing device

It is a device that transfers the ink of the graphics and text on the printing plate to the paper. (Printing cylinder, ink delivery (water delivery))

Paper delivery device

The paper delivery system of the web printing machine refers to the system for rewinding or folding and collecting the printed paper tape, which mainly includes drying and cooling devices, rewinding devices, folding devices, etc. (rewinding, rewinding, online Processing)

a. Drying and cooling device.

⒈Drying device

⑴High-speed hot-air drying device

Traditionally, air is heated by electricity and sent to the printed matter by a fan. However, it is popular to use heat pump technology, which can achieve an energy-saving ratio of 60%-90%.

⑵Flame drying device

⑶Flame-hot air combined drying device

2. Cooling device. The surface temperature of the paper tape at the outlet of the drying device can often reach 120~180C, which requires cooling the surface of the paper tape. For this reason, there is no cooling device behind the drying device; the cooling device generally consists of 2 to 3 hollow cooling rollers. Composition, connected to the cooling water circulation system

b. Rewinding device. In the printing of flexible packaging materials, it is often necessary to rewind the printed paper tape after multi-color printing, drying and cooling, which requires a rewinding device.

c. The folding device is a device that cuts and folds the printed paper tape on the web printing machine.

Other devices

Including positioning, conveying, paper guiding, detection, tension, register and other control and adjustment devices

Strictly speaking, technical equipment management includes two aspects, one is technical management; the other is equipment management.

technology

Technical management is a planned and purposeful scientific management of all technical activities in the production process, in accordance with the characteristics and laws of the production technology itself, and in accordance with the current technical policies.

The basic tasks of technical management are: to establish the necessary work order for the conduct of various technical activities, establish and improve various technical management systems, carry out scientific research, actively promote and adopt new technologies, new processes, and new materials, and transform existing technical equipment , Continuously tap the potential, innovate, and transform to improve the modernization level of the printing plant; provide reliable technical basis for the reasonable and efficient organization of production, including product design, process plans and various technical documents; at the same time, provide technical guarantees for safe production .

The main contents of technical management include: formulating plans for plant science and technology development and tapping potential, innovation, and transformation, formulating and implementing relevant regulations and responsibility systems for process management, quality management, and equipment management. The collection and management of scientific research and technical information, the management of technological innovation and the introduction of new technologies and equipment, the management of technical files and technical data, and the technical education, training and assessment of employees.

Technical management must have professional and technical personnel to be responsible, special institutions must be established, and modern scientific methods must be applied.

equipment

Equipment management ensures that all kinds of equipment are in good condition at all times, improves the efficiency of the equipment, and ensures the normal production of production.

The main tasks of equipment management are: according to the principle of technologically advanced and economically reasonable, correct purchase of equipment; ensure that the machinery and equipment are always in the best technical state; grasp the repair and maintenance technology of imported equipment as soon as possible, and do a good job in the procurement and Supply and other work to ensure the normal operation of equipment; formulate relevant equipment maintenance and repair systems, and supervise and implement them; establish equipment maintenance files, etc.

In addition, the rational use of equipment is also an important part of equipment management. Only by arranging production reasonably can the equipment be fully utilized. It can not only obtain the best economic effect, but also reduce the wear and tear of the equipment, extend the service life of the equipment, and obtain long-term, stable and greater benefits.