| 摘要 |
PROBLEM TO BE SOLVED: To enhance performance by forming a plurality of gates on the circumference of a resin molding die in positions corresponding to the positions of formation of resin injection gates and injecting resin through the gates to fill the space in a yoke. SOLUTION: Three melted resin injecting gates are formed in proximity to the rim of the top of a resin molding upper die 61U and three gates 68, 69, and 69 for introducing melted resin from the outside are formed at the lower end of the side of the die in positions corresponding to the positions of the three resin injection gates 48, 49, and 49 formed in a yoke 1, respectively. A resin molding lower die 61L is provided with an inner ring 63L. When melted resin is injected through the three gates 68, 69, and 69, it collides with the corners in the substantially L-shaped path and is thereby decelerated. Thereafter, the melted resin is guided to the gates 68, 69, and 69 and let to flow directly to the resin injection gates 48, 49, and 49 without colliding with the outer side of the yoke 1 to form a stator 70. Thus deformation in magnet wires is prevented and the performance of electromagnetic actuators is enhanced.
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