The woven bag printing machine is divided into a letterpress, lithographic, gravure and stencil printing machine according to the printing plate form; it is divided into a flat pressing type, a round flat type and a circular pressing type woven bag printing machine according to the plate loading and embossing structure.
The letterpress woven bag printing machine is the oldest woven bag printing machine. The graphic part of the surface of the printing plate is convex and the blank part is concave. When the machine is working, the rubber roller coated with ink rolls over the surface of the printing plate, and the raised image portion is covered with a uniform ink layer, while the concave blank portion is not stained with ink. The pressure mechanism transfers the ink to the surface of the print to obtain a clear print that replicates the desired print.
The graphic portion of the surface of the lithographic printing press printing plate is almost in the same plane as the blank portion. It utilizes the principle of water and oil repelling, so that the graphic part is resistant to water and oil, and the blank part is resistant to oil and hydrophilic without ink, and the ink of the inked part is transferred to the surface of the printed matter under pressure to complete the printing process.
After the indirect printing method, the lithographic woven bag printing machine has developed rapidly and has many varieties, such as office micro offset printing machines, large, multi-color, high-speed newspapers and magazines offset printing machines for sheet paper or web. , single-sided or double-sided lithographic woven bag printing machine. Among them, monochrome offset presses and web offset presses are representative. The lithographic bag printing machine has widely used electronic computer control devices, and the technology is becoming more and more advanced. Plate-making equipment has also been developed to use electronic color separation machines, and pre-coated photosensitive plates are widely used.
The letterpress woven bag printing machine mainly has three types: flat flat, round flat and round pressed. The flat-pressed flat-plate woven bag printing machine is also called a flat-press woven bag printing machine. The plate and the imprinting mechanism of the printing plate are flat. When working, the printing plate is in full contact with the imprinting plate, and the total pressure of the machine is relatively large at one time, and the relative imprinting time is longer. The woven bag printing machine requires that the printing plate and the embossing plate are flat and the printing surface is not large; the circular embossing embossed bag printing machine is also called the platform woven bag slitting machine , and the plate plate of the printing plate is planar, and the pressure is pressed. The printing mechanism is a circular roller. When the machine is working, the plate reciprocating motion, the printing speed is limited, so the output is not high; the round-pressed and convex woven bag printing machine is also called the rotary woven bag printing machine, and the plate and the printing mechanism of the printing plate are round. Shaped roller. When the machine is in operation, the impression cylinder moves with the print and contacts the plate cylinder. The impression cylinder and the plate cylinder continuously rotate at a high speed, so the productivity is high.
The main feature of the gravure woven bag printing machine is that the graphic part on the printing plate is concave and the blank part is convex, which is opposite to the layout structure of the letterpress woven bag printing machine. When the machine is printing a single color, the plate is first immersed in the ink tank to roll, and the entire surface of the printing plate is coated with the ink layer. Then, the ink layer on the surface of the printing plate which is a blank portion is scraped off, the convex portion is formed into a blank, and the concave portion is filled with the ink, and the deeper the recess is, the thicker the ink layer is. The machine transfers the ink of the recessed portion to the printed matter by pressure to obtain a printed matter.
The screen woven bag printing machine belongs to the more representative printing equipment in the stencil printing machine. The printing plate is a vertical and horizontal, latitude and longitude woven wire mesh woven from silk and other materials. A variety of screen woven bag printing machines, such as planes, curved surfaces, forming, printing and dyeing, printed circuits and new types of rotation, have been produced . Among them, the new rotary screen woven bag printing machine has higher speed and productivity. It is characterized in that the screen is mounted on the drum and the ink is poured into the drum. The drum rotates while the machine is working, and the squeegee prints the pattern quickly onto the print. ( http:// )
pressure transmitter is a device that converts pressure into a pneumatic signal or an electric signal for control and remote transmission. Pressure Sensor can convert the physical pressure parameters such as gas and liquid felt by the load cell sensor into a standard electrical signal (such as 4~20mADC, etc.), to supply secondary instruments such as indicating alarms, recorders, regulators, etc. for measurement and indication and process regulation.
Pressure transmitters are used in various industrial automatic control environments, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automatic control, aerospace, military industry, petrochemical, oil wells, electric power, ships, machine tools, pipelines and many other industries.
There are two types of pressure transmitters: electric and pneumatic. The uniform output signal of the electric type is a direct current signal such as 0-10mA, 4-20mA or 1-5V. The unified output signal of the pneumatic type is the gas pressure of 20-100Pa.
Pressure transmitters can be divided into force (torque) balance type, capacitive type, inductive type, strain type and frequency type according to different conversion principles.
Our advantageous products are mainly compact pressure transmitters, pressure transmitters with display, differential pressure transmitters, wind pressure transmitters, etc.
The main advantage
1. The pressure transmitter has the characteristics of reliable operation and stable performance
2. Dedicated V/I integrated circuit, less peripheral components, high reliability, simple and easy maintenance, small size, light weight, and extremely convenient installation and debugging;
3. Aluminum alloy die-casting shell, three-terminal isolation, electrostatic spray protection layer, durable;
4. 4-20mA DC two-wire signal transmission, strong anti-interference ability and long transmission distance;
5. LED, LCD, and pointer three kinds of indicator heads, the on-site reading is very convenient. Can be used to measure viscous, crystalline and corrosive media;
6. High accuracy and high stability. In addition to the imported original sensor that has been corrected by laser, the comprehensive temperature drift and nonlinearity of the whole machine within the operating temperature range are finely compensated.
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Wuxi Winsun Automation Instrument Co., Ltd , https://www.jswxwinsun.com