METHOD FOR MANUFACTURING ARMATURE CORE AND ARMATURE
First Claim
1. A method for manufacturing an armature core, comprising:
- forming an inner core by laminating a plurality of magnetic steel plates;
placing the inner core in a molding tool and filling the interior of the molding tool with magnetic powder; and
compression molding the magnetic powder in the molding tool, thereby forming an outer core such that the outer core is integrated with the inner core.
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Accused Products
Abstract
An armature includes an armature core, a rotary shaft inserted into a shaft fixing hole of the armature core, and coils each wound about one of teeth of the armature core. The teeth extend radially. The armature core includes an inner core having the shaft fixing hole, and an outer core that is provided about and is integrated with the inner core. The inner core is formed by laminating a plurality of magnetic steel plates. The outer core is formed by compression molding magnetic powder, and includes the teeth. Accordingly, the armature core has a high mechanical strength and is capable of obtaining a high magnetic flux density. Also, the armature core is easy to manufacture.
14 Citations
8 Claims
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1. A method for manufacturing an armature core, comprising:
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forming an inner core by laminating a plurality of magnetic steel plates; placing the inner core in a molding tool and filling the interior of the molding tool with magnetic powder; and compression molding the magnetic powder in the molding tool, thereby forming an outer core such that the outer core is integrated with the inner core. - View Dependent Claims (2)
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3. A method for manufacturing an armature core, comprising:
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separately forming a first core piece and a second core piece; and coaxially combining the first core piece and the second core piece, the forming of the first core piece and the forming of the second core piece each including; forming an inner core by laminating a plurality of magnetic steel plates; placing the inner core in a molding tool and filling the interior of the molding tool with magnetic powder; and compression molding the magnetic powder in the molding tool, thereby forming an outer core such that the outer core is integrated with the inner core. - View Dependent Claims (4, 5)
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6. A method for manufacturing an armature, comprising:
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forming an inner core by laminating a plurality of magnetic steel plates; placing the inner core in a molding tool and filling the interior of the molding tool with magnetic powder; compression molding the magnetic powder in the molding tool, thereby forming an outer core such that the outer core is integrated with the inner core, the outer core including a plurality of teeth extending radially; inserting a rotary shaft into a shaft fixing hole of the armature core; and winding coils about each tooth.
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7. A method for manufacturing an armature, comprising:
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separately forming a first core piece and a second core piece; coaxially combining the first core piece and the second core piece, inserting a rotary shaft into a shaft fixing hole of the armature core; and winding coils about each of a plurality of teeth of the armature core that extend radially, the forming of the first core piece and the forming of the second core piece each including; forming an inner core by laminating a plurality of magnetic steel plates; placing the inner core in a molding tool and filling the interior of the molding tool with magnetic powder; and compression molding the magnetic powder in the molding tool, thereby forming an outer core such that the outer core integrated with the inner core. - View Dependent Claims (8)
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Specification