Charging roller and its manufacturing method

Abstract

An electrically charging roller is composed of metallic core, elastic layer and protecting layer. It is prepared through extruding out the electrically conductive foam rubber tube, microwave sulfurizing at 180-200 deg.C, thermally stabilizing at 160-180 deg.C for 4-5 hr, inserting a metal core in the rubber tube, grinding, spraying the mixture of electrically conductive water-soluble polyurethane paint and solidifying agent on the surface of rubber tube, thermal solidifying at 130 deg.c for 3 hr, and cutting chort. Its volume intrinsic resistivity is 10 to the power 7-8 ohm.cm.

Description

technical field [0001] The present invention relates to a charging roller used in electrostatic latent image equipment such as laser printers, electrostatic copiers, facsimile machines, and cameras, and a manufacturing method thereof. Background technique [0002] According to electrostatic photography technology, the charging roller used in electrostatic latent image equipment such as laser printers, fax machines, copiers, and cameras is in contact with the photosensitive drum and rotates. Expose (laser beam) the electrostatic latent image of the image, make the toner transfer on the paper, complete the electrostatic latent image, and record it as a visible image on the paper, thus completing the laser printing (photography) process. [0003] In the past, the charging roller was added to the rubber with a conductive agent to make a conductive elastic layer, and then coated with a conductive paint to make the elastic layer of the charging roller. The elastic layer of this t...

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Problems solved by technology

[0004] Chinese patent CN 1298124A "charging roller for imaging equipment developing machine, manufacturing method and device of charging roller" discloses the technology of conductive foam elastic layer, and its foaming and vulcanization process is carried out between molds (metal molds or polymer molds) and It is carried out in a vulcanization tank, and the heat energy of these processes is transferred from the outside to the inside, and the foaming and vulcanization process also occurs from the outside to the inside, so the degree of vulcanization and foaming is not uniform, and naturally the resistance range of the elastic layer is large and not uniform enough.

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