Abstract
A multi-pole magnet roller is used in the development unit, which is a part of electrophotography such as copiers, or laser printers. One production method of the multi-pole magnet roller is the extrusion molding in a high magnetic field. We must adjust various parameters such as a shape of dies and current in the coils for the magnetic characteristics specifications. To make this process more efficient, we create the electromagnetic field simulation tools for the molding process. And Genetic Algorism is applied to the optimization of these parameters. Then we can obtain a higher flux magnetic density at the main magnetic pole than ever before, in a short period.
