Composite component comprising ring-shaped bonded magnet and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-11646154-B2
Application number	US-202117303571-A
Country	US
Kind code	B2
Filing date	Jun 2, 2021
Priority date	Apr 28, 2017
Publication date	May 9, 2023
Grant date	May 9, 2023

Abstract

The present invention relates to a composite component including a metal component having a substantially cylindrical shape or a substantially annular shape, and a ring-shaped bonded magnet disposed on the outer periphery of the metal component, the ring-shaped bonded magnet containing a thermoplastic resin, magnetic particles, and rubber particles.

First claim

What is claimed is:

1. A composite component, comprising:
a metal component having a substantially cylindrical shape or a substantially annular shape; and
a ring-shaped bonded magnet disposed on an outer periphery of the metal component,
the ring-shaped bonded magnet comprising a thermoplastic resin, magnetic particles, and rubber particles,
wherein the rubber particles contain no magnetic material, and the amount of the rubber particles in the ring-shaped bonded magnet is 0.3% by mass or greater and 1.0% by mass or less.

2. The composite component according to claim 1 ,
wherein each of the rubber particles comprises silicone rubber.

3. The composite according to claim 2 ,
wherein an average particle size of the rubber particles is more than 0.7 μm and less than 1 mm.

4. A method of manufacturing the composite according to claim 3 , the method comprising:
kneading a thermoplastic resin with magnetic particles to obtain a compound; and
integrally molding the compound and rubber particles with a metal component having a substantially cylindrical shape or a substantially annular shape.

5. A method of manufacturing the composite according to claim 2 , the method comprising:
kneading a thermoplastic resin with magnetic particles to obtain a compound; and
integrally molding the compound and rubber particles with a metal component having a substantially cylindrical shape or a substantially annular shape.

6. The method according to claim 5 ,
wherein the rubber particles are added in an amount of 0.3 parts by mass or greater and 1.0 parts by mass or less with respect to 100 parts by mass of the compound.

7. The composite component according to claim 1 ,
wherein an average particle size of the rubber particles is more than 0.7 μm and less than 1 mm.

8. A method of manufacturing the composite according to claim 7 , the method comprising:
kneading a thermoplastic resin with magnetic particles to obtain a compound; and
integrally molding the compound and rubber particles with a metal component having a substantially cylindrical shape or a substantially annular shape.

9. The method according to claim 8 ,
wherein the rubber particles are added in an amount of 0.3 parts by mass or greater and 1.0 parts by mass or less with respect to 100 parts by mass of the compound.

10. The composite component according to claim 7 ,
wherein an average particle size of the rubber particles is more than 2 μm and less than 1 mm.

11. A method of manufacturing the composite component according to claim 1 , the method comprising:
kneading a thermoplastic resin with magnetic particles to obtain a compound; and
integrally molding the compound and rubber particles with a metal component having a substantially cylindrical shape or a substantially annular shape.

12. The method according to claim 11 ,
wherein the rubber particles are added in an amount of 0.3 parts by mass or greater and 1.0 parts by mass or less with respect to 100 parts by mass of the compound.

13. A composite component, comprising:
a metal component; and
a ring-shaped bonded magnet disposed on an outer periphery of the metal component,
the ring-shaped bonded magnet comprising a thermoplastic resin, magnetic particles, and rubber particles,
wherein the rubber particles contain no magnetic material, and the amount of the rubber particles is 0.3% by mass or greater and 1.0% by mass or less, and
wherein each of the rubber particles comprises a silicone rubber, and the thermoplastic resin comprises a polyamide resin.

14. A composite component, comprising:
a metal component; and
a ring-shaped bonded magnet disposed on an outer periphery of the metal component,
the ring-shaped bonded magnet comprising a thermoplastic resin, magnetic particles, and rubber particles,
wherein the rubber particles contain no magnetic material, and the amount of the rubber particles is 0.3% by mass or greater and 1.0% by mass or less, and
wherein the ring-shaped bonded magnet further comprises rubber magnet particles containing magnetic particles.

Assignees

• Nichia Corp

Inventors

• Yoshida Rie
• Abe Masahiro
• Kume Michiya
• Ihara Kohei
• Tada Shuichi

Classifications

• H01F41/0266 Primary

  Moulding; Pressing (H01F41/0273 takes precedence; hard magnetic particles H01F1/06, H01F1/11) · CPC title

• B22F2998/10

  Processes characterised by the sequence of their steps · CPC title

• H01F1/06

  in the form of particles, e.g. powder (H01F1/047 takes precedence {; record carriers G11B5/70605}) · CPC title

• H01F1/113

  in a bonding agent · CPC title

• B22F3/225

  by injection molding · CPC title