Printers are the most commonly used output devices for computers, and are indispensable as office equipment. The printer can not only print documents but also print beautiful pictures. Printers can generally be divided into three types: dot matrix printers, inkjet printers, and laser printers. The landlord as a senior office family, the printer is a must. The printers used by the company are all purchased in the Chenlipu Mall under Chenguang. Here, the factory direct sales are guaranteed and the quality is guaranteed. Let me share with you the working principles of two types of printers, the dot matrix printer and the inkjet printer.
The dot printers we usually refer to are matrix matrix printers. This printer is mainly composed of a print head, character car structure, ribbon, paper conveying mechanism and control circuit. Due to the development of large-scale integrated circuits, systems based on microprocessor control have also appeared in printers. In this way, all the complicated mechanical operations and character formation on the printer can be stored, controlled, and operated by the microprocessor. The print head is the core component of the needle printer, which includes the printing needle, electromagnet and so on. These steel needles are arranged in a single row or double rows in the longitudinal direction to form a print head. A row of steel needles is driven by an electromagnet to strike the ribbon first (most of the ribbons are made of nylon silk, and the ribbon is dipped with the color used for printing There are two types of mechanisms for loading ribbons: cassette type and disc type. Due to the simpler structure, better and more convenient structure of the ribbon type, we usually use cassette type ribbons on needle printers). Behind is the printing paper that rotates synchronously to print a dot matrix of characters, and the entire character is made up of dots printed by several steel needles.
Inkjet printers can be divided into two types: solid-state inkjet and liquid-jet inkjet. The phase-change ink used in solid-state inkjet is solid at normal temperature. When printing, the ink is heated and liquefied and then sprayed onto the paper and penetrates into it. Therefore, the adhesion of the ink is quite good, and the color is extremely bright. However, such printers are expensive and generally suitable for professional users. What we usually call an inkjet printer refers to a printer that uses liquid inkjet technology. As early as the 1860s, this inkjet principle was used to record the waveform of an oscilloscope. After more than 100 years of development and improvement, this inkjet principle has been applied to inkjet printers as a printout device for computer systems. During this time, inkjet technology itself has been greatly developed, including inkjet principles and ink preparation. Great progress. Since then, inkjet printers have begun to enter offices and homes, and are favored by users for their noiseless working methods, beautiful output quality, and low prices.
Liquid inkjet printer technology is divided into two types in principle, one is continuous inkjet method, the other is intermittent inkjet method. The difference between the two inkjet printing technologies is that the continuous inkjet method continuously ejects the ink flow, but when printing is not required, a dedicated abdominal cavity stores the ejected ink, filters it, and reinjects it into the ink tank for repeating. use. This mechanism is more complicated. The intermittent inkjet method is relatively simple, it only ejects ink during printing, so it does not require a filter and a complicated ink circulation system. The driving part of this intermittent inkjet method has two different technologies, one is piezoelectric intermittent inkjet, and the other is thermal intermittent inkjet.
The piezoelectric intermittent inkjet method uses a special piezoelectric material. When a voltage pulse acts on the piezoelectric material, it deforms and squeezes the ink from the nozzle and shoots it on the paper. The thermal intermittent inkjet method uses a heating resistor. When an electrical signal is applied to it, heat is quickly generated to maintain the thin layer of ink at the bottom of the nozzle at a temperature of 900 degrees Fahrenheit or more. Vaporization produces bubbles. As the bubbles increase, the ink is ejected from the nozzle, and ink droplets are formed at the tip of the nozzle. The small ink droplets spray the paper surface against the surface tension of the ink to form a dot. You may ask at this time: Is the printing effect like this satisfactory? In fact, we do n’t have to worry, because the ink droplets are generally only about one millionth of a person ’s tears; when the heating resistor cools, the bubbles extinguish themselves, and the attraction generated when the bubbles break up draws new ink from the ink cartridge Nozzle, waiting for the next work.
The above is the working principle of needle printer and inkjet printer, I hope this article can help everyone!
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