JP7043902B2 - Rotor core manufacturing equipment, rotor core manufacturing method, and cal plate - Google Patents

Description

The present invention relates to a rotor core manufacturing apparatus and a manufacturing method used for a motor.

As a rotor core used for a motor, a magnet is known in which a magnet is accommodated in a magnet accommodating hole formed in the core body, a resin is filled in the magnet accommodating hole in which the magnet is accommodated, and the resin is cured to fix the magnet to the core body. There is. When manufacturing such a rotor core, it is necessary to cure the resin filled in the magnet accommodating hole and then remove the cured product of an unnecessary resin called cal formed outside the magnet accommodating hole. be.

As a conventional rotor core manufacturing device, there is a device in which a plate-shaped member called a cal plate is arranged between a molding die and a core body, and the cal plate is configured to hold the cal (for example, a patent). See Document 1). By providing the cal plate, if the cal plate is removed from the core body after the resin is cured, a plurality of cals are separated from the core body at once together with the cal plate, and the step of separating the cal is facilitated.

Japanese Patent No. 5805358

By the way, from the viewpoint of cost reduction, it is desirable to use the calplate repeatedly. Therefore, it is necessary to remove the caracal from the caracal plate after use.

In the cal plate, the size of the outlet of the hole for resin injection is formed to be small in order to facilitate the separation of cal. Therefore, when removing the cal from the cal plate, there is no choice but to push a small-diameter injector pin or the like from the outlet of the hole for resin injection to separate the cal from the hole, and it is not easy to remove the cal from the cal plate. rice field.

Therefore, it is an object of the present invention to provide a rotor core manufacturing apparatus , a rotor core manufacturing method, and a car plate capable of easily removing cal from the car plate.

For the purpose of solving the above problems, the present invention has a cylindrical core body in which a plurality of magnet accommodating holes are formed at intervals in the circumferential direction, and a plurality of magnet accommodating holes accommodated in the plurality of magnet accommodating holes. A manufacturing device for manufacturing a rotor core including a magnet and a resin filled and cured in each of the plurality of magnet accommodating holes, the fixed type on which the core body is mounted, and the core body. A movable type having a plurality of resin inlets, which is provided in the above, is arranged between the core main body and the movable type, and can move relative to the plate-shaped plate main body and the plate main body in the plate thickness direction. A cal plate having a dividing member is provided, the plate main body is arranged facing the movable mold, and the dividing member is arranged facing the core main body, and the cal plate is provided with the plurality of resins. The filling pot that guides the resin flowing in from the inflow port to each of the plurality of magnet accommodating holes and holds the cal, which is a cured product of the resin that has not been filled in the plurality of magnet accommodating holes, is the filling pot of the plurality of magnet accommodating holes. Of these, one is formed for each of the two magnet accommodating holes adjacent to each other in the circumferential direction of the core body, and each of the filling pots opens to the upper surface of the plate body and the movable resin inlet. It has a connection portion that communicates with, and two nozzle portions that open on the lower surface of the division member and communicate with each of the connection portion and the two magnet accommodating holes, and the division member is attached to the plate body. Provided is a rotor core manufacturing apparatus in which at least an end portion of the magnet held in the filling pot on the core body side can be detached from the filling pot by relatively moving in the plate thickness direction. do.

Further, the present invention is a method of fixing the magnet to the core main body by using the above-mentioned manufacturing apparatus for the purpose of solving the above-mentioned problems, and the core main body in which the magnet is accommodated in the magnet accommodating hole. Is placed on a fixed mold, and the cal plate is placed between the core body and the movable mold, and the resin supplied from the resin inlet is subjected to the magnet through the filling pot. A resin encapsulation step of flowing into the accommodating hole to fill the magnet accommodating hole and curing the resin filled in the magnet accommodating hole, and removing the movable mold and then removing the calplate from the core body from the core body. A cal separation step for separating the cal and a cal removing step for removing the cal from the cal plate are provided. In the cal removing step, the dividing member is relatively moved with respect to the plate body in the plate thickness direction. This provides a method for manufacturing a rotor core in which at least an end portion of the cal held in the filling pot on the core body side is detached from the filling pot.
Further, for the purpose of solving the above-mentioned problems, the present invention is housed in a cylindrical core body in which a plurality of magnet accommodating holes are formed at intervals in the circumferential direction, and in the plurality of magnet accommodating holes, respectively. A cal plate used for manufacturing a rotor core comprising a plurality of magnets and a resin filled and cured in each of the plurality of magnet accommodating holes, the plate having a plate-shaped plate body and the plate with respect to the plate body. It has a split member that can move relative to each other in the thickness direction, and the split member is arranged between the plate body and the core body to guide the resin to each of the plurality of magnet accommodating holes and the plurality of magnet accommodating holes. A filling pot for holding a cal, which is a cured product of the resin that was not filled in the magnet, is formed for each of the two magnet housing holes adjacent to each other in the circumferential direction among the plurality of magnet housing holes. The filling pot has a connection portion that opens on the surface of the plate body opposite to the split member, and the connection portion and the two magnet accommodating holes that open on the surface of the split member on the core body side. By having two nozzle portions communicating with the magnet and moving the dividing member relative to the plate body in the plate thickness direction, at least the core body side of the magnet held in the filling pot. Provided is a cal plate in which the end portion of the magnet is removable from the filling pot.

According to the present invention, it is possible to provide a rotor core manufacturing apparatus , a rotor core manufacturing method, and a car plate capable of easily removing cal from the car plate.

It is a figure which shows the rotor core manufactured by the rotor core manufacturing apparatus which concerns on one Embodiment of this invention, (a) is the perspective view, (b) is the sectional view which shows the cross section including the central axis. It is sectional drawing which shows the manufacturing apparatus of the rotor core which concerns on one Embodiment of this invention. It is a figure which shows the cal plate, (a) is a plan view, (b) is an enlarged sectional view in the vicinity of a filling pot. (A) and (b) are explanatory views explaining the removal of cal from a cal plate. (A) and (b) are cross-sectional views showing a modified example of a calplate. It is a flow chart which shows the procedure of the manufacturing method of the rotor core which concerns on this embodiment. (A) and (b) are explanatory views explaining a resin sealing process. (A) and (b) are explanatory views explaining a cal separation process. (A) and (b) are cross-sectional views showing a modified example of a calplate.

[Embodiment]
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

(Explanation of rotor core)
1A and 1B are views showing a rotor core manufactured by the rotor core manufacturing apparatus according to the present embodiment, FIG. 1A is a perspective view, and FIG. 1B is a cross-sectional view showing a cross section including a central axis. As shown in FIGS. 1A and 1B, the rotor core 10 is filled and cured in the core body 11, the magnet 14 housed in the magnet housing hole 13 formed in the core body 11, and the magnet housing hole 13. It has the resin 15 and the resin 15.

The core main body 11 is a laminated body in which a plurality of iron core pieces 12 made of electromagnetic steel sheets are laminated. The core main body 11 is formed in a substantially cylindrical shape as a whole, and a central hole 11a is formed in the axial center portion thereof so as to penetrate the core main body 11 in the axial direction. The reference numeral C in FIGS. 1 (a) and 1 (b) represents the central axis of the core main body 11. A key portion 11b is formed on the inner peripheral surface of the core main body 11 so as to project inward in the radial direction from the facing position. The key portion 11b is used for positioning with respect to the fixed mold 2 described later.

The magnet accommodating hole 13 is formed on the outer peripheral side of the central hole 11a and is formed so as to penetrate the core main body 11 in the axial direction. A plurality of magnet accommodating holes 13 are formed in the core main body 11 at intervals in the circumferential direction. The magnet accommodating hole 13 is formed in an elongated hole shape, and the major axis direction thereof is formed so as to be inclined with respect to the radial direction of the core main body 11. More specifically, a magnet accommodating hole 13 whose major axis direction is inclined by a predetermined angle with respect to the radial direction of the core main body 11 and a magnet whose major axis direction is inclined by a predetermined angle with respect to the radial direction of the core main body 11. The accommodating holes 13 are alternately formed so as to be separated from each other in the circumferential direction of the core main body 11.

Each magnet accommodating hole 13 accommodates a plate-shaped magnet 14 extending along the axial direction of the core main body 11. The magnet accommodating hole 13 is filled with a resin 15, and the magnet 14 is fixed to the core main body 11 by the resin 15. As the resin 15, a thermosetting resin such as an epoxy resin can be used.

A cooling hole 11c through which a cooling medium for cooling the magnet 14 is passed is formed on the outer peripheral side of the core main body 11 with respect to the central hole 11a and on the inner peripheral side with respect to the magnet accommodating hole 13. A plurality of cooling holes 11c are formed in the core main body 11 so as to be spaced apart from each other in the circumferential direction. Each cooling hole 11c is formed so as to penetrate the core main body 11 in the axial direction, and is formed in an arc shape curved along the circumferential direction of the core main body 11. Although not shown, each cooling hole 11c has a communication portion that branches inside the core body 11 and communicates with the center hole 11a.

(Explanation of rotor core manufacturing equipment)
FIG. 2 is a cross-sectional view showing a rotor core manufacturing apparatus according to the present embodiment. As shown in FIG. 2, in the rotor core manufacturing apparatus 1, the magnet 14 is accommodated in the magnet accommodating hole 13 formed in the core main body 11, and the magnet accommodating hole 13 accommodating the magnet 14 is filled with resin and cured. , A device for fixing a magnet 14 to a core body 11. The rotor core manufacturing apparatus 1 includes a fixed type 2, a movable type 3, and a cal plate 4.

In the fixed type 2, the core main body 11 in which the magnet 14 is housed is placed in the magnet accommodating hole 13, the fixed type main body 21, the support member 22 fixed to the upper surface of the fixed type main body 21, and the support member. It has a spacer 23 arranged on the upper surface of the 22.

The support member 22 protrudes upward from the plate-shaped base portion 22a fixed to the upper surface of the fixed type main body 21 by bolts shown in the figure and the central portion of the base portion 22a, and is inserted into the central hole 11a of the core main body 11. It has a post portion 22b having a substantially cylindrical shape. Although not shown, a pair of key grooves into which the key portion 11b of the core main body 11 is inserted is formed on the outer peripheral surface of the post portion 22b, and the key portion 11b is fixed by inserting the key portion 11b into the key grooves. The core body 11 is positioned with respect to the mold 2.

The spacer 23 is formed in a plate shape, and an insertion hole 23a through which the post portion 22b is inserted is formed in the central portion thereof. Although not shown, the spacer 23 has a pair of regulating protrusions that protrude into the insertion hole 23a and are inserted into the keyway of the post portion 22b. By inserting the regulating protrusions into the keyway, the support member is supported. The spacer 23 is positioned with respect to the 22 and the core body 11. The core body 11 is placed on the upper surface of the spacer 23, and the lower surface of the core body 11 and the upper surface of the spacer 23 come into contact with each other.

A pin hole 23b that penetrates the spacer 23 in the plate thickness direction is formed at a position of the spacer 23 corresponding to the magnet accommodating hole 13 of the core body 11, and a regulation pin 23c is formed in the pin hole 23b from below. It is inserted and fixed. The upper end of the regulating pin 23c projects upward from the upper surface of the spacer 23 and protrudes into the magnet accommodating hole 13, and supports the magnet 14 accommodated in the magnet accommodating hole 13 from below.

The movable mold 3 is provided on the core main body 11 mounted on the fixed mold 2 so as to be detachable from the fixed mold 2. The movable type 3 has a movable type main body 31 and a plate portion 32 fixed to the lower surface of the movable type main body 31. The outer shape of the plate portion 32 is larger than that of the cal plate 4. The movable type 3 has a plurality of resin inlets 33 for inflowing the resin that seals the magnet accommodating holes 13. Each resin inflow port 33 is formed so as to penetrate the movable main body 31 and the plate portion 32, and is formed in a circular shape in a plan view.

(Explanation of Cal Plate 4)
3A and 3B are views showing a cal plate 4, FIG. 3A is a plan view, and FIG. 3B is an enlarged cross-sectional view of the vicinity of the filling pot 41. In FIG. 3A, the position of the magnet insertion hole 13 when the cal plate 4 is placed on the core main body 11 is represented by a broken line. As shown in FIGS. 2 and 3, the cal plate 4 is formed in a plate shape and is arranged between the core main body 11 and the movable mold 3 (plate portion 32). The lower surface of the cal plate 4 abuts on the upper surface of the core body 11, and the upper surface of the cal plate 4 abuts on the lower surface of the plate portion 32.

The cal plate 4 is formed with a plurality of filling pots 41 that guide the resin flowing in from the resin inlet 33 of the movable type 3 to the magnet accommodating holes 13. In the present embodiment, one filling pot 41 is formed for each of the two magnet accommodating holes 13 adjacent to each other in the circumferential direction. Although the details will be described later, the filling pot 41 also serves to hold the cal, which is an unnecessary cured product of the resin, after the resin is cured.

The filling pot 41 is formed in a circular shape in a plan view, penetrates the connection portion 41a that opens on the upper surface and communicates with the resin inlet 33 of the movable type 3, and the bottom wall of the connection portion 41a, and accommodates the connection portion 41a and a magnet. It has two nozzle portions 41b that communicate with the hole 13. The nozzle portion 41b is formed in a rectangular shape in a plan view, and is formed in a tapered shape in which the opening becomes narrower toward the bottom (about the core body 11 side). As a result, after the resin is cured, the connecting portion connecting the resin 15 sealing the magnet accommodating hole 13 and the unnecessary cal becomes thinner, and the cal is easily separated from the resin 15.

In the rotor core manufacturing apparatus 1 according to the present embodiment, the cal plate 4 has a plate-shaped plate main body 42 and a split member 43 that can move relative to the plate main body 42 in the plate thickness direction. There is. Further, the cal plate 4 moves the dividing member 43 relative to the plate body 42 in the plate thickness direction, so that at least the end portion of the cal held in the filling pot 41 on the core body 11 side (lower side) is squeezed. It is possible to remove from the filling pot 41.

In the present embodiment, the dividing member 43 is formed in a plate shape, and the dividing member 43 is superposed on the core body 11 side (lower side) of the plate body 42 to form the cal plate 4. The connecting portion 41a of the filling pot 41 is formed in the plate main body 42, and the nozzle portion 41b of the filling pot 41 is formed over the plate main body 42 and the dividing member 43. As described above, a part of the filling pot 41 (here, the lower part of the nozzle portion 41b) is formed in the dividing member 43 so as to penetrate the dividing member in the plate thickness direction.

As a result, as shown in FIG. 4A, when the dividing member 43 is relatively moved in the plate thickness direction (downward) with respect to the plate body 42 and the dividing member 43 is removed from the plate body 42, the core body of the cal 5 is formed. The end portion (lower end portion) on the 11 side is separated from the filling pot 41. In this state, the cal 5 remains on the plate body 42. Therefore, as shown in FIG. 4 (b), the lower end portion of the cal 5 is brought into contact with the flat plate-shaped pedestal 6, and the plate body 42 is placed on the pedestal. Push it to the 6 side. Then, the cal 5 is pushed out above the plate body 42, and the cal 5 can be removed from the cal plate 4.

In the present embodiment, since the cal plate 4 is formed by superimposing the plate main body 42 and the dividing member 43, it is desired to easily align the two. Therefore, in the present embodiment, the dividing member 43 is provided with the locking projection 44a, the plate body 42 is provided with the locking groove 44b for accommodating the locking projection 44a, and the locking projection 44a is accommodated in the locking groove 44b. This makes it easy to align the plate body 42 with the dividing member 43. The relationship between the protrusion and the groove may be reversed, and the plate body 42 may be provided with the locking protrusion and the dividing member 43 may be provided with the locking groove.

Here, the division position of the plate body 42 and the division member 43 is set in the middle of the nozzle portion 41b, but the division position is not limited to this, and the division position of the plate body 42 and the division member 43 is set in the middle of the connection portion 41a or the connection portion. It can also be the boundary position between the 41a and the nozzle portion 41b. In this case, as shown in FIG. 5A, the connecting portion 41a is formed in a tapered shape that expands in diameter upward, or as shown in FIG. 5B, the inner wall of the connecting portion 41a expands upward. It is preferable to form it in a stepped shape so that the cal 5 can be left on the plate body 42 side when the dividing member 43 is removed.

(Explanation of how to manufacture the rotor core)
FIG. 6 is a flow chart showing a procedure of a method for manufacturing a rotor core according to the present embodiment. As shown in FIG. 6, in the rotor core manufacturing method according to the present embodiment, first, in step S1, a core body forming step of forming the core body 11 is performed. In the core body forming step of step S1, an electromagnetic steel sheet is pressed to form an iron core piece 12, and a plurality of formed iron core pieces 12 are laminated and pressed from above and below to form a core body 11. The specific process for forming the core body 11 is not limited to this.

After that, in step S2, a preparatory step of setting the core main body 11 in the rotor core manufacturing apparatus 1 is performed. In the preparation step of step S2, the core main body 11 is placed on the fixed mold 2, and the magnet 14 is accommodated in the magnet accommodating hole 13 of the core main body 11. Further, the cal plate 4 and the movable mold 3 are sequentially arranged on the core main body 11.

Then, in step S3, a resin sealing step is performed. In the resin sealing step of step S3, as shown in FIG. 7A, a base material 15a made of a thermosetting resin, which is a raw material of the sealing resin 15, is inserted into the resin inlet 33 of the movable type 3. Then, while pushing the base material 15a downward (on the core body 11 side) by the plunger 7, the base material 15a is melted by heat, and the resin (melted base material 15a) is supplied from the resin inlet 33. As shown in FIG. 7B, the resin supplied from the resin inflow port 33 flows into the magnet accommodating hole 13 through the filling pot 41, and the resin is filled in the filling pot 41. When the resin filled in the magnet accommodating hole 13 is cured by heat, the resin 15 for sealing the magnet accommodating hole 13 is formed, and the cal 5 is formed in the filling pot 41 of the cal plate 4. In the resin sealing step, it is preferable to heat a part of the core main body 11 and the rotor core manufacturing apparatus 1 in advance, and use this heat to melt the base material 15a and cure the resin.

Then, in step S4, a cal separation step is performed. In the caracal separation step of step S4, as shown in FIG. 8A, the movable mold 3 is moved upward to be detached, and then, as shown in FIG. 8B, the caracal plate 4 is moved from the core body 11. By removing it, the cal 5 is separated from the core body 11. If the core body 11 from which the cal 5 is separated is removed from the fixed mold 2, the rotor core 10 of FIG. 1 can be obtained.

Then, in step S5, a cal removal step of removing the cal 5 from the cal plate 4 is performed. In the cal removal step of step S5, as described in FIGS. 4A and 4B, the dividing member 43 is relatively moved in the plate thickness direction (downward) with respect to the plate body 42, so that the filling pot 41 is used. The end portion of the cal 5 held on the core body 11 side is separated from the filling pot 41. After that, when the lower end portion of the cal 5 is brought into contact with the flat plate-shaped pedestal 6 and the plate body 42 is pushed toward the pedestal 6, the cal 5 is removed from the cal plate 4.

(Variation example of Cal Plate 4)
In the present embodiment, the case where the dividing member 43 is formed into a plate shape and the cal plate 4 is formed by superimposing the plate main body 42 and the dividing member 43 has been described, but the shape and the like of the dividing member 43 are limited to this. It's not something. For example, as shown in FIGS. 9A and 9B, it is also possible to push the split member 43 upward from below to push the cal 5 held in the filling pot 41 upward. ..

In the example of FIGS. 9A and 9B, the dividing member 43 integrally has a plate-shaped pressing portion 43a and a shaft portion 43b extending downward from the pressing portion 43a. A through hole 42a penetrating the bottom wall is formed in the bottom wall of the connection portion 41a of the plate body 42, and by inserting the shaft portion 43b from above into the through hole 42a, the split member 43 becomes thicker. It is held by the plate body 42 so as to be movable in the direction. The upper surface of the pressing portion 43a is exposed in the filling pot 41 and comes into contact with the lower surface of the cal 5 formed in the filling pot 41.

When the shaft portion 43b is pushed upward with a jig, a finger, or the like and the dividing member 43 is relatively moved in the plate thickness direction (here, upward) with respect to the plate body 42, the cal 5 held in the filling pot 41 is pressed. It is pushed out to the inflow side (movable type 3 side, upper side) of the resin by the portion 43a, and the cal 5 is separated from the filling pot 41. A recess 42b is formed on the lower surface of the plate body 42 so that the shaft portion 43b can be easily pushed in, and the lower end portion of the shaft portion 43b projects into the recess 42b.

Here, in order to avoid interference with the core main body 11, the lower end portion of the shaft portion 43b is prevented from protruding below the lower surface of the plate main body 42, but the lower end portion of the shaft portion 43b is formed on the plate main body 42. A groove or a hole may be formed on the upper surface of the core main body 11 so as to avoid the lower end portion of the shaft portion 43b. As a result, the split member 43 can be pushed upward and the cal 5 can be separated by simply pressing the cal plate 4 against the flat plate-shaped pedestal or the like, and the work of removing the cal 5 becomes easier.

(Actions and effects of embodiments)
As described above, in the rotor core manufacturing apparatus 1 according to the present embodiment, the cal plate 4 has a plate-shaped plate main body 42 and a split member 43 that can move relative to the plate main body 42 in the plate thickness direction. By moving the dividing member 43 relative to the plate body 42 in the plate thickness direction, at least the end portion of the cal 5 held in the filling pot 41 on the core body 11 side is removed from the filling pot 41. It is said that it can be withdrawn.

With such a configuration, it becomes possible to easily remove the cal 5 from the cal plate 4 as compared with the case where the cal 5 is extruded by an injector pin having a small diameter or the like as in the conventional case. As a result, it becomes possible to improve the manufacturing efficiency of the rotor core 10, and it becomes possible to improve the mass productivity.

Although the embodiments of the present invention have been described above, the embodiments described above do not limit the invention according to the claims. It should also be noted that not all combinations of features described in the embodiments are essential to the means for solving the problems of the invention. Further, the present invention can be appropriately modified and implemented without departing from the spirit of the present invention.

1 ... Rotor core manufacturing device, 2 ... Fixed type, 21 ... Fixed type main body, 22 ... Support member, 22a ... Base part, 22b ... Post part, 23 ... Spacer, 23a ... Insertion hole, 23b ... Pin hole, 23c ... Restriction pin, 3 ... Movable type, 31 ... Movable body, 32 ... Plate part, 33 ... Resin inlet, 4 ... Cal plate, 41 ... Filling pot, 41a ... Connection part, 41b ... Nozzle part, 42 ... Plate body, 42a ... through hole, 42b ... recess, 43 ... dividing member, 43a ... pressing part, 43b ... shaft part, 44a ... locking protrusion, 44b ... locking groove, 5 ... cal, 6 ... pedestal, 7 ... plunger, 10 ... Rotor core, 11 ... core body, 11a ... center hole, 11b ... key part, 11c ... cooling hole, 12 ... iron core piece, 13 ... magnet accommodating hole, 14 ... magnet, 15 ... resin, 15a ... base material

Claims (4)

A cylindrical core body in which a plurality of magnet accommodating holes are formed at intervals in the circumferential direction, a plurality of magnets accommodated in the plurality of magnet accommodating holes, and each of the plurality of magnet accommodating holes are filled. A manufacturing device for manufacturing a rotor core provided with a hardened resin.
The fixed type on which the core body is placed and
A movable type provided on the core body and having a plurality of resin inlets,
It comprises a plate-shaped plate body arranged between the core body and the movable mold, and a cal plate having a dividing member that can move relative to the plate body in the plate thickness direction.
The plate body is arranged to face the movable mold, and the dividing member is arranged to face the core body.
The cal plate is filled with resin that has flowed in from the plurality of resin inlets and is guided to each of the plurality of magnet accommodating holes and holds cal, which is a cured product of the resin that has not been filled in the plurality of magnet accommodating holes. One pot is formed for each of the two magnet accommodating holes adjacent to each other in the circumferential direction of the core body among the plurality of magnet accommodating holes .
Each of the filling pots has a connecting portion that opens to the upper surface of the plate body and communicates with the movable resin inlet, and the connecting portion and the two magnet accommodating holes that open to the lower surface of the dividing member. Has two nozzles, which communicate with each of the
By moving the split member relative to the plate body in the plate thickness direction, at least the end portion of the cal held in the filling pot on the core body side can be detached from the filling pot. Yes,
Rotor core manufacturing equipment. The two nozzle portions are each formed in a series of tapered shapes, and are formed over the plate body and the dividing member.
A locking projection is provided on one of the plate body and the dividing member, and a locking groove is provided on the other.
The plate body and the dividing member are aligned by accommodating the locking projection in the locking groove.
The rotor core manufacturing apparatus according to claim 1. A method of fixing the magnet to the core body by using the manufacturing apparatus according to claim 1 or 2 .
A preparatory step of placing the core body containing the magnet in the magnet accommodating hole on the fixed mold and arranging the cal plate between the core body and the movable mold.
A resin sealing step of flowing the resin supplied from the resin inlet into the magnet accommodating hole through the filling pot to fill the magnet accommodating hole and curing the resin filled in the magnet accommodating hole.
A cal separation step of separating the cal from the core body by detaching the movable mold and then removing the cal plate from the core body.
A cal removal step of removing the cal from the cal plate is provided .
In the cal removal step, by moving the dividing member relative to the plate body in the plate thickness direction, at least the end portion of the cal held in the filling pot on the core body side is pressed into the filling pot. Withdraw from
How to manufacture the rotor core. A cylindrical core body in which a plurality of magnet accommodating holes are formed at intervals in the circumferential direction, a plurality of magnets accommodated in the plurality of magnet accommodating holes, and each of the plurality of magnet accommodating holes are filled. A cal plate used in the manufacture of a rotor core comprising a hardened resin.
It has a plate-shaped plate body and a dividing member that can move relative to the plate body in the plate thickness direction, and the dividing member is arranged between the plate body and the core body.
A filling pot that guides the resin to each of the plurality of magnet accommodating holes and holds a cal that is a cured product of the resin that has not been filled in the plurality of magnet accommodating holes is adjacent to the plurality of magnet accommodating holes in the circumferential direction. It is formed one for each of the two magnet housing holes that fit together.
Each of the filling pots has a connecting portion that opens on the surface of the plate body opposite to the dividing member, and the connecting portion and the two magnet accommodating holes that open on the surface of the dividing member on the core body side. Has two nozzles, which communicate with each of the
By moving the split member relative to the plate body in the plate thickness direction, at least the end portion of the cal held in the filling pot on the core body side can be detached from the filling pot. Yes,
Cal plate.

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