JP2019075963A - Apparatus for manufacturing motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor manufacturing apparatus capable of manufacturing a motor while maintaining the shape of a stator core. According to the present invention, a stator core 53 is placed close to a cavity 10c formed by bringing a movable mold 11 close to a fixed mold 12, and the cavity 10c is filled with a resin 54 and cured to form a stator 51 of a motor. The movable mold 11 has a tapered movable center post 111 extending in the first direction X1 toward the fixed mold 12 and narrowing along the first direction X1. The mold 12 has a tapered fixed center post 121 extending in the second direction X2 toward the movable mold 11 and narrowing along the second direction X2, and the tip of the movable center post 111 and the fixed center post 121. It is a motor manufacturing apparatus 10 that faces the tip and forms a cylindrical stator 51 with a resin 54 filled between a movable center post 111 and a fixed mold 12. [Selection diagram] Fig. 1

Description

  The present invention relates to a motor manufacturing apparatus, and more particularly to a motor manufacturing apparatus capable of manufacturing a motor while maintaining the shape of a stator core.

  A motor manufacturing apparatus is known that includes a mold having a movable mold and a fixed mold, and the mold is filled with a resin and cured to form a stator.

  In Patent Document 1, the motor stator core is placed in a cavity (cavity) formed by bringing a movable die (moving die) close to a stationary die, and resin is filled in the cavity to make the motor stator An apparatus for manufacturing a forming motor is disclosed. However, in the motor manufacturing apparatus described in Patent Document 1, in order to easily remove the molded product (stator) from the mold, a tapered shape which is tapered toward the tip is used as a movable center post. There is. For this reason, it is difficult to maintain the shape of the stator core by the center post, and there is a possibility that axial deviation may occur in the molded product.

JP, 2014-23387, A

  As described above, there is a problem that it is difficult to manufacture the motor while maintaining the shape of the stator core.

  An object of the present invention is to provide a motor manufacturing apparatus capable of manufacturing a motor while maintaining the shape of a stator core.

The present invention
An apparatus for manufacturing a motor, in which a stator core is placed close to a cavity formed by bringing a movable die into proximity to a fixed die, and resin is filled in the cavity and cured to form a motor stator,
The movable mold has a tapered movable movable center post that extends in a first direction toward the fixed mold and narrows along the first direction,
The fixed mold has a tapered fixed fixed center post that extends in a second direction toward the movable mold and narrows along the second direction,
The tip of the movable center post and the tip of the fixed center post face each other,
Forming the cylindrical stator by the resin filled between the movable center post and the fixed mold and between the fixed center post and the movable mold;
It is a manufacturing apparatus of a motor.
According to such a motor manufacturing apparatus, not only the movable type but also the fixed type has a center post supporting the stator core, and the two center posts can support the stator core.

  According to the present invention, since each of the movable type and the fixed type has the center post supporting the stator core, it is possible to provide a motor manufacturing apparatus capable of manufacturing the motor while maintaining the shape of the stator core.

It is a schematic diagram which illustrates the movable type and fixed type of the manufacture device of the motor concerning an embodiment. It is a schematic diagram which illustrates the part D of FIG. It is a schematic diagram which illustrates the part D of FIG. It is a schematic diagram which illustrates the movable type and fixed type of the manufacture device of the motor concerning the comparative example of an embodiment. It is a schematic diagram which illustrates the part E of FIG. It is a schematic diagram which illustrates the part E of FIG. It is a schematic diagram which illustrates the part E of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding elements are denoted by the same reference numerals, and redundant description will be omitted as appropriate for the clarity of the description.

Embodiment
FIG. 1 is a schematic view illustrating a movable mold and a fixed mold of the motor manufacturing apparatus according to the embodiment.
FIG. 1 is an example of a horizontal injection molding machine.

  As shown in FIG. 1, the motor manufacturing apparatus 10 according to the embodiment matches the relative positional relationship between the mold 10 a and the stator core 53 in the resin sealing process of the stator 51 sealing the stator core 53 with the resin 54. In order to ensure the insertability of the stator core 53, the structure of the mold 10a can restrict the positions of both ends of the stator core 53.

  In addition, the stator 51 is a part which comprises a motor. Further, the stator 51 is obtained by resin molding the coil 52 and the stator core 53 with the resin 54.

  The motor manufacturing apparatus 10 includes a movable mold 11 and a fixed mold 12. The movable mold 11 and the fixed mold 12 are collectively referred to as a mold 10a.

  The movable mold 11 has a movable center post 111. The movable center post 111 extends in a first direction X1 toward the fixed mold 12. The shape of the movable center post 111 is a tapered shape that narrows along the first direction X1.

  The fixed mold 12 has a fixed center post 121. The fixed center post 121 extends in the second direction X2 toward the movable mold 11. The shape of the fixed center post 121 is a tapered shape that narrows along the second direction X2. That is, the shape of each of the movable center post 111 and the fixed center post 121 is a tapered shape in which the tip is thinner than the root.

  The tip of the movable center post 111 and the tip of the fixed center post 121 face each other.

  The motor manufacturing apparatus 10 approaches the stator core 53 in a cavity 10 c formed by bringing the movable mold 11 close to the stationary mold 12. Then, the resin 54 is filled in the cavity 10c thus formed and cured to mold the stator 51 of the motor. That is, the cylindrical stator 51 is formed of the resin 54 filled between the movable center post 111 and the fixed mold 12 and between the fixed center post 121 and the movable mold 11.

FIG. 2A is a schematic view illustrating a portion D of FIG.
FIG. 2A is a schematic view illustrating a movable type and a fixed type in an ideal state.
FIG. 2B is a schematic view illustrating a portion D of FIG.
FIG. 2B is a schematic view illustrating the movable type and the fixed type when the stator core is dropped by its own weight.

  As shown in FIG. 2A, in the motor manufacturing apparatus 10, a gap 10d may be provided between the movable center post 111 and the fixed center post 121. When the resin 54 is injected from the resin injection port 10 e and filled with the resin 54, the gap 10 d serves as a flow path of the resin 54 as a disk gate.

  After the stator core 53 is formed, the disk gate is removed by a general method such as mechanical cutting or laser. Molding is performed by, for example, a transfer mold or an injection molding machine.

  Also, by moving any one of the movable mold 11 and the fixed mold 12 in a direction parallel to the reference axis C (first direction X1 or second direction X2), the variation is absorbed and fixed to the movable center post 111. The gap 10d with the mold center post 121 may be eliminated. The movement in the direction parallel to the reference axis C is performed by a known method such as, for example, a spring, air pressure or oil pressure.

  When forming the stator core 53, in the ideal state, as shown in FIG. 2A, the reference axis of the stator core 53 and the reference axis of the center post (the movable center post 111 and the fixed center post 121) coincide as a reference axis C. It is complete. In the ideal state, there is no axis deviation and the coaxiality is zero.

  However, as shown in FIG. 2B, when the stator core 53 is formed, the stator core 53 actually falls by its own weight. As the stator core 53 falls by its own weight, the movable center post 111, the fixed center post 121, and the resin 54 move. As a result, the position P1 of the reference axis C moves to the position P2 and the position P3. The position P2 is the position of the reference axis of the center post, and the position P3 is the position of the reference axis of the stator core 53.

  The motor manufacturing apparatus 10 includes center posts (the movable center post 111 and the fixed center post 121) for supporting the stator core 53 not only for the movable mold 11 but also for the fixed mold 12. By having these two center posts, the tip of the stator core 53 does not sag. Since the tip of the stator core 53 does not sag, the offset of the reference axis C due to this can be eliminated, and the coaxiality is improved as compared with the case where the number of center posts is one.

  The coil may be referred to as a coil wire. Also, the weight of oneself may be referred to as its own weight. Moreover, molding may be called resin molding.

  In the motor manufacturing apparatus 10 according to the embodiment, each of the movable mold 11 and the fixed mold 12 has a center post that supports the stator core 53, so the shape of the stator core 53 can be maintained. Each center post has a tapered shape that narrows toward the tip, and in particular, the tapered portion can hold the shape of the stator core 53 at the thick portion.

  As a result, it is possible to provide a motor manufacturing apparatus capable of manufacturing the motor while maintaining the shape of the stator core.

  Further, in the motor manufacturing apparatus 10, since each center post has a tapered shape, the molded stator 51 (molded product) can be easily removed from the mold 10a. That is, the shape of the stator core 53 can be maintained while maintaining the ease of mold removal of the molded stator 51.

  Further, in the motor manufacturing apparatus 10, since each center post has a tapered shape, the stator core 53 can be easily inserted into the cavity 10c. Further, in the motor manufacturing apparatus 10, the cavity 10c can be made larger than when the center post is not tapered, and a larger stator 51 can be inserted into the cavity 10c.

[Comparative example]
FIG. 3 is a schematic view illustrating the movable type and the fixed type of the motor manufacturing apparatus according to the comparative example of the embodiment.
FIG. 3 is an example of a horizontal injection molding machine.

  As shown in FIG. 3, the motor manufacturing apparatus 20 according to the comparative example is different from the motor manufacturing apparatus 10 according to the embodiment in that the fixed mold 22 is not provided with the fixed center post. Further, in the motor manufacturing apparatus 20, the length of the movable center post 211 along the first direction X1 is greater than the length of the movable center post 111 along the first direction X1 as compared to the motor manufacturing apparatus 10. Also the long point is different.

FIG. 4A is a schematic view illustrating a portion E of FIG.
FIG. 4A is a schematic view illustrating a movable type and a fixed type in an ideal state.
FIG. 4B is a schematic view illustrating a portion E of FIG.
FIG. 4B is a schematic view illustrating the movable type and the fixed type when the stator core is dropped by its own weight.
FIG. 4C is a schematic view illustrating a portion E of FIG.
FIG. 4C is a schematic view illustrating the movable type and the fixed type when the tip of the stator core is dropped.

  As shown in FIG. 4A, in the motor manufacturing apparatus 20 according to the comparative example, when the stator core 53 is formed as in the motor manufacturing apparatus 10 according to the embodiment, in the ideal state, the reference axis of the stator core 53 and the center axis The reference axes of the posts coincide with each other as the reference axis C.

  As shown in FIG. 4B, in the motor manufacturing apparatus 20 according to the comparative example, when the stator core 53 is formed, the position P1 of the reference axis C is the position P2 as in the motor manufacturing apparatus 10 according to the embodiment. And move to position P3. The position P2 is the position of the reference axis of the center post, and the position P3 is the position of the reference axis of the stator core 53.

  As shown in FIG. 4C, in the motor manufacturing apparatus 20 according to the comparative example, only the movable die 21 has a center post (movable center post 211) supporting the stator core 53. Further, in the motor manufacturing apparatus 20 according to the comparative example, the fixed mold 12 does not have the center post that supports the stator core 53. The movable center post 211 has a tapered shape in consideration of the insertability of the stator core 53 and the releasability after resin molding.

  When the reference of the reference axis of the stator core 53 is on the tip side of the movable center post 211, the degree of coaxiality is deteriorated by the amount of inclination of the movable center post 211 by the tapered shape. Therefore, the position of the reference axis further moves, and the position P2 moves to the position P4, and the position P3 moves to the position P5.

  The stator core 53 is inclined according to the tapered shape of the movable center post 211, and the tip of the stator core 53 sags. Then, with the tip of the stator core 53 hanging down, the mold is clamped and resin molded.

  As described above, in the motor manufacturing apparatus 20 according to the comparative example, since the tip of the stator core 53 hangs down, it is difficult to maintain the shape of the stator core 53.

  As a result, it is difficult to provide a motor manufacturing apparatus capable of manufacturing the motor while maintaining the shape of the stator core.

  The present invention is not limited to the above embodiment, and can be appropriately modified without departing from the scope of the invention.

  10, 20: Motor manufacturing apparatus 10a: mold 10c: cavity 10d: gap 10e: resin injection port 11, 21: movable type 111, 211: movable type center post 12, 22: fixed type 121: fixed type center post 51 ... Stator 52 ... Coil 53 ... Stator core 54 ... Resin C ... Reference axis D, E ... Portion P1, P2, P3, P4, P5 ... Position X1 ... First direction X2 ... Second direction

Claims (1)

An apparatus for manufacturing a motor, in which a stator core is placed close to a cavity formed by bringing a movable die into proximity to a fixed die, and resin is filled in the cavity and cured to form a motor stator,
The movable mold has a tapered movable movable center post that extends in a first direction toward the fixed mold and narrows along the first direction,
The fixed mold has a tapered fixed fixed center post that extends in a second direction toward the movable mold and narrows along the second direction,
The tip of the movable center post and the tip of the fixed center post face each other,
Forming the cylindrical stator by the resin filled between the movable center post and the fixed mold and between the fixed center post and the movable mold;
Motor manufacturing equipment.

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