Magnetic roller
At present, the main body of the laser printer toner drum magnetic roller commonly used in the market is usually composed of a magnetic roller magnetic core and a wear-resistant adsorption layer; the magnetic roller is generally made of four independent magnetic strips bonded on a metal shaft to obtain magnetism, and its magnetic poles The angle is controlled by the equipment fixture. In this way, since the magnetic strip is bonded to the metal shaft by an adhesive, the function of the magnetic roller is that the magnetic roller (MR) rubs against the powder knife to charge the toner, and the machine controls the magnetic roller. Charging, the triboelectrically charged toner is adsorbed on the surface of the magnetic roller.
Composition: The magnetic roller is composed of a magnetic core, a bracket, a conductive wire and a magnetic sleeve; the magnetic sleeve is composed of an aluminum layer and a coating; the coating must have certain conductivity, wear resistance and roughness. The paper feeding mechanism of an inkjet printer is mainly composed of a paper feed motor, a pickup roller, a paper feed roller, and a paper output roller.
Paper feeding mechanism:
Uses: printers, copiers, fax machines, cashier POS machines, quick-wash photographic equipment,The paper conveying device of the printer includes three parts: the media seperator, the media stopper, and the picking mechanism. Among them, the main board, key operation panel, stepper motor maintenance, sensor power supply, etc. provide working voltage; +24V voltage is mainly for paper feeding motor drive, multi-edge motor drive, high voltage board, cooling fan, etc.; +220V voltage is mainly for fuser Provide working voltage. The low-voltage power supply circuit is mainly composed of a heating circuit, a rectifier circuit, a filter circuit, a switch circuit, and a protection circuit. The electric mechanism becomes a stepper motor with a rare earth permanent magnet rotor, including EPSON, Canon, Ricoh, OKI, etc. The stepper motor used is divided into 24 steps and 48 steps, and the corresponding permanent magnet rotor is also 24 poles or 48 in outer diameter. pole magnetization.
Cooling mechanism
When continuously printing 500-1000 pages, etc., the heat dissipation will be automatically suspended after printing dozens of pages. The purpose of stopping the heat dissipation of the printer is to protect the heating components of the printer and delay the service life of the heating components. At present, the mainstream built-in heat dissipation method in the market is air-cooled heat dissipation. In other words, the built-in heat dissipation fan ensures that the temperature of the device drops below the required value before restarting the printing work. Cooling fans generally choose permanent magnet DC fans. This kind of cooling fan equipped with rare earth permanent magnets has the characteristics of high efficiency and quietness. It can quickly cool the equipment while creating a quiet and comfortable environment with low noise.
الوسم : application of permanent magnets in office automation, China, manufacturers, suppliers, factory, customized, made in China
