Copier precision components

    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 needs There is a certain degree of conductivity, wear resistance and roughness.

    (1) The toner in the powder bin is attracted to the surface of the magnetic roller sleeve through the internal magnetic core.

    (2) The carbon powder is charged with static electricity through the friction between the coating on the surface of the magnetic sleeve, the carbon powder particles and the polyurethane sheet on the powder ejection knife.

    (3) The magnetic roller sleeve uses AC (alternating current) and DC (direct current) voltage to make the charged toner between the magnetic roller sleeve and the surface of the drum core OPC“ Beating”, so that the “electrostatic latent image” on the surface of the drum core is adsorbed to the toner.

    Matters needing attention

    (1) The surface roughness of the magnetic roller will affect the printing quality, so pay attention to it during use Protect the coating on the surface of the magnetic roller and its roughness.

    (2) Do not overlap and press the magnetic roller during production to avoid deformation of the magnetic sleeve; do not touch the surface with your hands or oil.

    (3) Note that the conductive wire or conductive spring on the conductive support of the magnetic roller can meet the normal contact with the conductive steel sheet of the magnetic roller during the assembly without deformation.

    The magnetic roller is one of the components that has the greatest impact on the blackness of the print quality. The thickness and roughness of the black coating will change with continuous use. After blowing off the toner adsorbed on the magnet roller, if the black coating on the magnet roller looks very thin, even if you see the color of the aluminum base or the surface looks very shiny, then the print quality produced by such a magnet roller will be very good. Shallow, it should be replaced with a new magnet roller or magnet roller cover.