Plastic magnet construction

Abstract

Abstract PURPOSE:To obtain a material excellent in resistance against temperature change and in magnetic performance by providing a cushion layer made of a synthetic resin binder which has lower melting point or greater ductility than that of the synthetic resin binder of a plastic magnet and magnetic powder between the plastic magnet and a metal core. CONSTITUTION:Between a plastic magnet 4 and a metal core 2, a cushion layer 3 made of a synthetic resin binder which has lower melting point or greater ductility than that of the synthetic resin binder of the plastic magnet 4 and magnetic powder is provided. For example, in a metal mold inserted with a shaft 2, a mixed magnetic composition material of polyethylene resin and barium ferrite is formed by pressing to make the cushion layer 3. The material is inserted in a metal mold which can obtain a product of required dimensions and a mixed magnetic composition material 6 of nylon and barium ferrite is formed by injection to make the plastic magnet 4 whereby a magnet roll 1 is made.

Inventors

• 👤 Kunio Okumura
• 👤 奥村　邦夫
• 👤 Atsuo Tanaka
• 👤 田中　敦雄

Bibliographic Details