Isotropic bonded NdFeB magnet and magnetic roller consisting of same

An isotropic, NdFeB technology, applied in the direction of magnetic objects, magnetic materials, permanent magnets, etc., can solve the problems of difficulty in obtaining a homogeneous magnetic field, affecting imaging quality, and high production costs, and achieves difficult demagnetization and high remanence , The effect of strong magnetic properties
CN101673606BActive Publication Date: 2013-06-12上海三环磁性材料有限公司 +1
2 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
上海三环磁性材料有限公司
Publication Date
2013-06-12

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a magnetic roller used in a laser printer and a copier. An isotropic bonded NdFeB magnet used by the magnetic roller contains rare earth permanent magnetic powder and adhesive resin, wherein the rare earth permanent magnetic powder is a mixture of NdFeB magnetic powder and ferrit magnetic powder, and the formed magnet has the length of between 210 and 910mm. When the isotropic bonded NdFeB magnet is used to replace one or more ferrit permanent magnet poles in the magnetic roller, because the bonded NdFeB magnet has stronger magnetic performance than ferrit magnets, a strong magnetic filed can be formed on an outer surface taking the bonded NdFeB magnet as a pole so as to provide stronger magnetic filed adsorptive power, contribute to the size distribution of multiple kinds of color matching powder, and reduce the grey back of copying and printing to contribute to clear imaging.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of magnetic rollers used in printers and copiers. Background technique

[0002] The magnetic roller is the key component of development in laser printers and copiers, and its performance is directly related to the quality of imaging. At present, a typical magnetic roller includes a mandrel, a cylindrical permanent magnet fixed on the outside of the said mandrel, the surface of the permanent magnet has a plurality of magnetic poles extending in the axial direction, the magnetic roller is covered with a sleeve, and the magnetic roller can be relatively sleeved. Drum turns. Its working principle is: through the relative rotation of the magnetic roller and the sleeve, the magnetic roller absorbs the magnetic developer onto the surface of the sleeve, and then transports it to the developing area and develops it by electrostatic charge. Usually such a magnetic roller has an outer diameter of 10-60 mm, a length o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More