1. Structure and composition of toner cartridge
Toner cartridges consist of photosensitive drums, toner container, waste toner container, primary charge roller, magnetic roller and other parts.
Photosensitive drum: It is the core component of the toner cartridge. It is generally a cylinder made of aluminum with a layer of photosensitive material or organic photosensitive material coated on the surface. During the printing process, the surface of the photosensitive drum will be charged, exposed and other operations according to the image signal received by the printer, thereby forming an electrostatic latent image. For example, when the printer wants to print a word, the signal sent by the computer will cause the corresponding area of the photosensitive drum to change the charge distribution accordingly.
Toner container: It is used to store toner.
Toner powder: Toner is a fine powder composed of pigments, plastic resins and additives. It is the “raw material” of the printed content. Different brands and models of toner may have different colors and qualities. When an electrostatic latent image is formed on the photosensitive drum, the toner will be adsorbed onto the latent image, thereby visualizing the latent image.
Waste toner container: During the printing process, waste toner is generated when the photosensitive drum is cleaned. The waste toner container is used to collect these waste toners to prevent waste toner leakage from polluting the inside of the printer, and it is also beneficial to the environment.
Primary charging roller: The function of the charge roller is to charge the photosensitive drum evenly, preparing for subsequent exposure and forming an electrostatic latent image.
Magnetic roller: The magnetic roller is mainly responsible for adsorbing the toner from the toner container and charging it so that it can be better adsorbed to the electrostatic latent image of the photosensitive drum.
2. Working principle of the toner cartridge
First, at the beginning of printing, the charging roller will charge the surface of the photosensitive drum evenly, so that the surface of the photosensitive drum has a certain electrostatic charge. Then, the printer’s laser scanning system (also called the exposure device) will expose the photosensitive drum according to the image signal of the printed content. The charge of the exposed area will disappear, so that an electrostatic latent image corresponding to the printed content is formed on the surface of the photosensitive drum.
Then, the magnetic roller adsorbs the toner in the toner container and charges it. These charged toners will be adsorbed to the electrostatic latent image area on the photosensitive drum, turning the latent image into a visible toner image. After that, the toner image is transferred to the paper through the transfer roller. Finally, the paper passes through the fuser roller, which heats and pressurizes the fixing roller to firmly adhere the toner to the paper, completing the printing process. After the photosensitive drum completes one print, it will be cleaned by the cleaning blade to remove the residual toner and collect the waste toner in the waste toner container to prepare for the next print.
3. Importance and maintenance
The quality of the toner cartridge directly affects the print quality. If the surface of the photosensitive drum of the toner cartridge is scratched or worn, it may cause problems such as streaks, blur or uneven colors in the printed image. The quality of the toner is also critical. Poor-quality toner may cause paper jams, poor fixing or poor printing effects.
In order to extend the service life of the toner cartridge, you need to pay attention to correct use and maintenance. When installing and removing the toner cartridge, follow the requirements of the printer manual to avoid collision and damage. At the same time, keep the printer’s working environment clean to prevent dust and other impurities from entering the toner cartridge. If the printer is not used for a long time, it is best to take out the toner cartridge and store it in a dry, cool place to prevent the toner cartridge from getting damp or the photosensitive material from aging.
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