JP2016134967A - Resin filling method and resin filling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin filling method by which a structure of a mold can be simplified and time and labor for removing an unnecessary resin portion can be saved, and a resin filling device.SOLUTION: The resin filling method uses the resin filling device 1 to fill, with a resin 7, a filling gap 42 that is formed by disposing a magnet 6 in a magnet arrangement hole 41 which is provided in an axial line direction L of a laminated core 4 of a rotary electric machine rotor. The laminated core 4 includes: a resin hole 43 in the axial line direction L of the laminated core 4; and a communication path 44 that communicates the resin hole 43 and the magnet arrangement hole 41. The resin filling method also includes holding the laminated core 4 between an upper mold 3 in which a plunger 32 is provided in a movable manner, and a lower mold 2. The resin 7 in a molten state stored in the resin hole 43 is then extruded to the gap 42 for filling via the communication path 44 by the plunger 32 that is inserted from a first end face 401 of the laminated core 4 into the resin hole 43, and fills the gap 42 for filling.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a resin filling method and a resin filling apparatus for filling a resin for fixing a magnet in a magnet arrangement hole of a laminated iron core of a rotor for a rotating electrical machine.

  As a technique for manufacturing a rotor used in a rotating electrical machine, a magnet placement hole is provided in a laminated iron core in which a plurality of electromagnetic steel plates are laminated, and resin (thermosetting) is formed in a gap formed when a magnet is placed in the magnet placement hole. A technique for filling resin) is known. For example, in the manufacturing apparatus and the manufacturing method of the rotor laminated iron core of Patent Document 1, it is disclosed that the permanent magnets inserted into the plurality of magnet insertion holes of the rotor laminated iron core are fixed by resin injected into the magnet insertion holes. Has been.

JP 2006-197693 A

  However, in the conventional technique of fixing a magnet with resin, the resin passes through the mold of the apparatus, and the resin is injected from the end face of the laminated core into the gap in the magnet arrangement hole. Therefore, after the resin is filled into the gap in the magnet arrangement hole, an unnecessary resin portion remains in the mold or on the end face of the laminated iron core. Therefore, after the resin is filled, it is necessary to remove an unnecessary resin portion from the end face of the mold or the laminated core.

  The present invention has been made in view of such a background, and it is intended to provide a resin filling method and a resin filling apparatus that can simplify the structure of the mold and can save the trouble of removing unnecessary resin portions. It was obtained as.

One aspect of the present invention is a resin filling method for filling a resin into a filling gap formed by placing a magnet in a magnet placement hole provided along the axial direction of a laminated core of a rotor for a rotating electrical machine,
The laminated iron core is provided with a resin hole along the axial direction of the laminated iron core, and a communication path communicating the resin hole with the magnet arrangement hole.
The above laminated iron core is sandwiched between an upper mold provided with a movable plunger and a lower mold,
By the plunger inserted into the resin hole from the first end surface of the laminated iron core, the molten resin stored in the resin hole is pushed out to the filling gap through the communication path, and the filling gap The resin filling method is characterized in that the resin is filled.

Another aspect of the present invention is a resin filling apparatus for filling a resin into a filling gap formed by arranging a magnet in a magnet arrangement hole provided along the axial direction of a laminated core of a rotor for a rotating electrical machine. ,
The laminated iron core is provided with a resin hole along the axial direction of the laminated iron core, and a communication path communicating the resin hole with the magnet arrangement hole.
A lower mold on which the laminated iron core is placed;
A plunger is movably provided, and includes an upper mold that sandwiches the laminated core between the lower mold,
The laminated core is sandwiched between the upper mold and the lower mold, and the molten resin is retained in the resin hole by the plunger inserted into the resin hole from the first end surface of the laminated core. The resin filling device is configured to push the resin into the filling gap through the communication path and fill the filling gap.

In the resin filling method, the laminated iron core is provided with a resin hole in which the resin to be filled into the magnet arrangement hole is once arranged, and a communication path that connects the resin hole and the magnet arrangement hole. When the molten resin is filled into the filling gap in the magnet arrangement hole, the resin is arranged in the resin hole. Here, a solid resin can be arranged in the resin hole, and a molten resin can also be arranged. When placing a solid resin in the resin hole, the resin is melted by a heating means.
Next, the laminated core is sandwiched between the upper mold and the lower mold, and the plunger in the upper mold is inserted into the resin hole from the first end surface of the laminated core. Then, the molten resin accumulated in the resin hole is pressurized by the plunger. At this time, the resin in the resin hole is pushed out to the filling gap through the communication path and filled into the filling gap.

Thus, in the resin filling method, the resin is supplied from the resin hole provided in the laminated iron core to the filling gap via the communication path. As a result, unnecessary resin portions do not remain on each end face of the laminated iron core, and the labor of removing the unnecessary resin portions can be saved.
In addition, it is not necessary to provide a portion for storing the resin pressurized by the plunger or a resin flow path (runner, gate, etc.) in the mold used when filling the resin, and the structure of the mold can be simplified. it can. And, an unnecessary resin portion does not remain in the mold, and the trouble of removing this unnecessary resin portion can be saved.

Therefore, according to the above resin filling method, the structure of the mold can be simplified, and the trouble of removing unnecessary resin portions can be saved.
In addition, the resin filling apparatus can simplify the structure of the mold as well as the resin filling method, and can save the trouble of removing unnecessary resin portions.

Cross-sectional explanatory drawing which shows the resin filling apparatus with which the laminated iron core concerning Example is mounted. Cross-sectional explanatory drawing which shows the resin filling apparatus of the state concerning which the plunger was inserted in the resin hole of the laminated iron core concerning an Example. Cross-sectional explanatory drawing which shows the resin filling apparatus of the state which filled the resin from the resin hole to the filling gap by the plunger concerning an Example. Cross-sectional explanatory drawing which shows the resin filling apparatus of the state concerning the Example where the laminated iron core was lifted by the ejector. Cross-sectional explanatory drawing which shows the laminated iron core with which the clearance gap for filling concerning an Example was filled with resin. Cross-sectional explanatory drawing which shows the laminated core with which the clearance gap for filling concerning an Example was filled with the resin seen from the end surface side. Cross-sectional explanatory drawing which shows the other resin filling apparatus concerning the Example which filled the resin from the resin hole to the filling gap with the plunger.

A preferred embodiment of the above-described resin filling method will be described.
In the resin filling method, the magnet arrangement hole is formed in a state of penetrating the entirety of the plurality of electromagnetic steel plates laminated in the axial direction of the laminated core, and the resin hole is formed in the laminated core. Of the plurality of electromagnetic steel plates laminated in the axial direction, the remaining electromagnetic steel plates except the outermost electromagnetic steel plate located on the second end surface opposite to the first end surface are formed in the remaining electromagnetic steel plates, and the communication path is It is formed on a predetermined number of electromagnetic steel sheets laminated adjacent to the outermost electromagnetic steel sheet, and the opening end on the first end face side in the magnet arrangement hole is closed by the upper mold, and the magnet arrangement The opening end on the second end face side of the hole may be closed by the lower mold or a transport pallet that can be attached to and detached from the lower mold.

Since the magnet arrangement hole penetrates the entire electromagnetic steel sheet, the magnet in the magnet arrangement hole can be arranged in the entire axial direction from the first end face to the second end face.
In addition, the resin ends left in the resin hole and the communication path after filling the resin into the filling gap by closing the opening end on the second end surface side of each of the resin hole and the communication path with the outermost electromagnetic steel plate, It can be prevented from coming out on the second end face of the laminated iron core.

  The predetermined number of electromagnetic steel sheets forming the communication path can be 2 to 5 electromagnetic steel sheets laminated adjacent to the outermost electromagnetic steel sheet. In other words, the predetermined number of electromagnetic steel sheets forming the communication path can be the second electromagnetic steel sheet adjacent to the outermost electromagnetic steel sheet and the third electromagnetic steel sheet adjacent to the second electromagnetic steel sheet. It can be from the second electromagnetic steel sheet adjacent to the electromagnetic steel sheet to the fifth electromagnetic steel sheet. By forming the communication path to the predetermined number of electromagnetic steel sheets, the resin can flow from the second end face side toward the first end face side in the filling gap. Thereby, the filling of the resin into the filling gap can be performed smoothly.

  In addition, the magnet arrangement hole and the resin hole may be an outermost electromagnetic steel sheet positioned on a second end surface opposite to the first end surface among the plurality of electromagnetic steel plates laminated in the axial direction of the laminated core. Except for the remaining electromagnetic steel sheet, the communication path is formed in a predetermined number of electromagnetic steel sheets laminated adjacent to the outermost electromagnetic steel sheet, and the first end face in the magnet arrangement hole The opening end on the side may be closed by the upper mold.

The magnet arrangement hole, the resin hole, and the communication path are formed after the resin is filled in the filling gap by closing the opening end on the second end face side of each of the magnet arrangement hole, the resin hole, and the communication path with the outermost electromagnetic steel plate. It is possible to prevent the resin left on the second end surface of the laminated core from coming out.
Similarly to the above, the predetermined number of electromagnetic steel sheets forming the communication path can be 2 to 5 electromagnetic steel sheets laminated adjacent to the outermost electromagnetic steel sheet.

In addition, after placing a solid resin in the resin hole and melting the solid resin by heating the laminated iron core, the resin is passed through the communication path by the plunger. It can be pushed out into the filling gap.
Thereby, the resin can be easily filled into the filling gap in the magnet arrangement hole.

Below, the Example concerning a resin filling method and a resin filling apparatus is described with reference to drawings.
In the resin filling method of this example, as shown in FIG. 1 to FIG. 3, a magnet placement hole 41 provided along the axial direction L of the laminated iron core 4 of the rotor for a rotating electrical machine is used by using the resin filling device 1. The resin 7 is filled into the filling gap 42 formed by arranging the magnet 6. The laminated core 4 is provided with a resin hole 43 along the axial direction L of the laminated core 4 and a communication path 44 that communicates the resin hole 43 and the magnet arrangement hole 41. In the resin filling method, the laminated iron core 4 is sandwiched between an upper mold 3 provided with a movable plunger 32 and a lower mold 2. Next, the molten resin 7 stored in the resin hole 43 is pushed out to the filling gap 42 through the communication path 44 by the plunger 32 inserted into the resin hole 43 from the first end surface 401 of the laminated core 4. The filling gap 42 is filled.

Next, the rotor for a rotating electrical machine will be described.
As shown in FIGS. 5 and 6, the rotor for the rotating electrical machine of this example is an inner rotor disposed on the inner peripheral side of the stator. The rotor is formed by fixing a magnet (permanent magnet) 6 with a resin 7 in a magnet arrangement hole 41 of the laminated iron core 4 and attaching a rotation shaft to the center of the laminated iron core 4. The laminated iron core 4 is formed by laminating a plurality of electromagnetic steel plates 51 to 54 in the axial direction L, and the magnet arrangement hole 41 is formed by connecting holes provided in the electromagnetic steel plates 51 to 54. ing. A plurality of magnet arrangement holes 41 are arranged side by side in the circumferential direction C of the laminated core 4 so that the magnets 6 arranged in the magnet arrangement holes 41 are opposed to the coils in the stator to form a magnetic circuit. In the laminated core 4, the two magnet arrangement holes 41 adjacent to each other constitute a magnet arrangement hole set 410, and the magnet arrangement hole set 410 is arranged in the circumferential direction C around the center of the laminated core 4. Thus, a plurality of sets are formed radially.

As shown in FIG. 6, the magnet arrangement hole set 410 is configured by two magnet arrangement holes 41 whose intervals in the circumferential direction C gradually increase toward the inner circumference side. The resin hole 43 is an intermediate position in the circumferential direction C with respect to the two magnet arrangement holes 41 constituting the magnet arrangement hole set 410, and is formed at a position facing the two magnet arrangement holes 41 from the inner circumference side. ing. The communication path 44 is formed from the resin hole 43 toward the two magnet arrangement holes 41. Further, the number of resin holes 43 corresponding to the number of magnet arrangement hole sets 410 is formed, and the number of communication paths 44 corresponding to the number of magnet arrangement holes 41 is formed.
The resin hole 43 is a hole provided for temporarily disposing the resin 7 in the laminated iron core 4, and is a discard hole that becomes unnecessary after the filling gap 42 is filled with the resin 7.

  As shown in FIG. 5, the magnet arrangement hole 41 is formed in a state of penetrating the entire plurality of electromagnetic steel plates 51 to 54 laminated in the axial direction L of the laminated iron core 4. The resin hole 43 excludes the outermost electromagnetic steel plate 51 located on the second end surface 402 opposite to the first end surface 401 among the plurality of electromagnetic steel plates 51 to 54 laminated in the axial direction L of the laminated iron core 4. The remaining electromagnetic steel sheet 54 is formed. The communication path 44 is connected to the second electromagnetic steel plate 52 and the third electromagnetic steel plate 53 adjacent to the outermost electromagnetic steel plate 51 as a predetermined number of electromagnetic steel plates 52 and 53 laminated adjacent to the outermost electromagnetic steel plate 51. Is formed. By forming the communication path 44 to the second electromagnetic steel plate 52 and the third electromagnetic steel plate 53, the resin 7 moves from the second end surface 402 side to the first end surface 401 side in the filling gap 42. Can flow.

  A central hole 45 for receiving the rotation shaft is provided along the axial direction L at the center of the laminated core 4. The electromagnetic steel plates 51 to 54 are punched from each other and stacked on each other, and are caulked to each other by a caulking portion 46 formed when the punching is performed. The remaining electromagnetic steel sheet 54 excluding the outermost electromagnetic steel sheet 51, the first electromagnetic steel sheet 52 and the third electromagnetic steel sheet 53 includes a portion constituting the center hole 45 by punching, a portion constituting the magnet arrangement hole 41, a resin hole The part which comprises 43 is formed. Further, the second electromagnetic steel plate 52 and the third electromagnetic steel plate 53 are provided with a portion forming the center hole 45 by punching, a portion forming the magnet arrangement hole 41, a portion forming the resin hole 43, and a communication path 44. To be formed. Further, the outermost electromagnetic steel sheet 51 is formed with a portion constituting the center hole 45 and a portion constituting the magnet arrangement hole 41 by punching.

  Note that, as shown in FIG. 7, the magnet arrangement hole 41 may not be formed in the outermost electromagnetic steel sheet 51. In this case, the opening end on the second end surface 402 side of the magnet arrangement hole 41, the resin hole 43, and the communication path 44, which is the entire portion of the second end surface 402 of the laminated core 4 that contacts the resin 7, is the endmost electromagnetic. Blocked by the steel plate 51. Therefore, the resin 7 filling the filling gap 42 can be prevented from coming out to the second end surface 402 of the laminated core 4.

As shown in FIG. 6, a magnet 6 having a rectangular shape is arranged in the magnet arrangement hole 41 as viewed from the end face of the laminated core 4. The filling gap 42 is formed with a pair of minute gaps 421A and 421B facing the long side of the rectangular magnet 6 and a resin reservoir 422 in which the resin 7 is stored in order to ensure the performance of the magnet 6. Has been. The communication path 44 is in communication with the minute gap portion 421 </ b> B located on the inner peripheral side of the laminated iron core 4.
The resin 7 is a thermosetting resin, which melts when heated and is further heated and cured. Note that the resin 7 may be a thermoplastic resin.

Next, the resin filling apparatus 1 used in the resin filling method will be described.
As shown in FIG. 1, the resin filling device 1 is capable of lowering relative to the lower die 2 on which the laminated core 4 is placed, the upper die 3 that is lowered with respect to the lower die 2, and the upper die 3. And a plurality of plungers 32 provided on the device.
A heater 21 for heating the laminated iron core 4 by heat transfer is embedded in the lower mold 2. A transport pallet 22 on which the laminated iron core 4 is placed can be attached to and detached from the upper surface of the lower mold 2. A center guide 222 is provided on the upper surface 221 of the transport pallet 22 so as to be positioned in the center hole 45 provided at the center of the stacked iron core 4 to position the stacked core 4 with respect to the transport pallet 22. The laminated iron core 4 is transported while being placed on the transport pallet 22, and the magnet 6 disposed in the magnet placement hole 41 is received by the transport pallet 22.

The upper mold 3 and the plurality of plungers 32 are configured to descend integrally with respect to the transport pallet 22 and the laminated iron core 4 placed on the lower mold 2. The plurality of plungers 32 are provided with respect to a plunger base 31 that can slide relative to the upper mold 3. Each plunger 32 is disposed in the plunger base 31 at a position facing each resin hole 43 of the laminated iron core 4 placed on the lower mold 2. A lower surface 301 for pressing the first end surface 401 of the laminated core 4 is formed at the lower end of the upper mold 3. The lower surface 301 is configured to close open ends on the first end surface 401 side in the plurality of magnet arrangement holes 41. A heater 33 for heating the laminated iron core 4 by heat transfer is embedded in the front end side portion of the upper mold 3.
As shown in FIG. 3, when the upper mold 3 is lowered with respect to the lower mold 2, the laminated iron core 4 is placed in the axial direction L between the lower surface 301 of the upper mold 3 and the upper surface 221 of the transport pallet 22. Compressed.

  As shown in FIGS. 1 and 4, the lower mold 2 has ejector pins 23 for lifting (floating) the laminated core 4 from the conveying pallet 22 after the filling gap 42 is filled with the resin 7. Buried. The lower mold 2 is provided with an arrangement hole 24 in which the ejector pin 23 is arranged, and the conveyance pallet 22 is formed with an insertion hole 223 into which the ejector pin 23 is inserted. After the filling gap 42 is filled with the resin 7, the ejector pin 23 is raised, and the laminated core 4 is lifted by the ejector pin 23 arranged in the insertion hole 223.

Next, the method for filling the filling gap 42 with the resin 7 using the resin filling apparatus 1 of this example and the operation and effect of this example will be described.
First, as shown in FIG. 1, the laminated iron core 4 in which a plurality of electromagnetic steel plates 51 to 54 are laminated is placed on the conveyance pallet 22, and the magnet 6 is arranged in the magnet arrangement hole 41 of the laminated iron core 4. Further, the lower mold 2 is heated by the heater 21. Further, the transport pallet 22 is placed on the lower mold 2, and the solid resin 7 is disposed in the resin hole 43 of the laminated core 4. At this time, the conveyance pallet 22 and the laminated iron core 4 are heated by the heater 21 in the lower mold 2 and the heater 33 in the upper mold 3, and the solid resin 7 is melted. The solid resin 7 can be solid as one lump, and can be a plurality of pellets or particles.

  Next, as shown in FIG. 2, the upper mold 3 and the plunger base 31 provided with the plurality of plungers 32 are lowered integrally. The lower ends of the plurality of plungers 32 are inserted into the upper portions of the resin holes 43 of the laminated core 4, and the upper mold 3 is placed on the first end surface (upper surface) 401 of the laminated core 4. At this time, the opening end on the first end surface 401 side in the magnet arrangement hole 41 is closed by the lower surface 301 of the upper mold 3. Further, the opening end on the second end surface 402 side in the magnet arrangement hole 41 is closed by the upper surface 221 of the transport pallet 22 facing the second end surface 402 in the laminated core 4.

When the upper mold 3 and the plunger base 31 are integrally lowered, the laminated core 4 is compressed in the axial direction L by the lower mold 2, the transport pallet 22 and the upper mold 3 as shown in FIG. 3. At the same time, the melted resin 7 is pressurized. The molten resin 7 flows from the resin hole 43 to the filling gap 42 through the communication path 44, and the molten resin 7 is filled into the communication path 44 and the filling gap 42.
Since the communication path 44 is formed in the second electromagnetic steel plate 52 and the third electromagnetic steel plate 53, the resin 7 is disposed on the first end surface 401 in order from the second end surface 402 side in the filling gap 42. Can flow toward the side. Thereby, the filling of the resin 7 into the filling gap 42 can be performed smoothly.

  Next, as shown in FIG. 4, the ejector pin 23 is raised to lift the laminated iron core 4 from the transport pallet 22, and the resin 7 in the filling gap 42 is once separated from the transport pallet 22. Thereafter, the conveyance pallet 22 on which the laminated core 4 is placed can be taken out from the lower mold 2, and the laminated core 4 can be removed from the conveyance pallet 22 outside the resin filling device 1. In the figure, the retracted upper die 3, plunger 32 and the like are omitted.

  In this example, as described above, the opening end on the first end face 401 side in the magnet arrangement hole 41 and the opening end on the second end face 402 side in the magnet arrangement hole 41 are closed by the upper mold 3 and the transport pallet 22. Can be removed. Thereby, after the resin 7 is filled into the filling gap 42, the resin 7 in the filling gap 42 can be prevented from coming out to the first end surface 401 and the second end surface 402 of the laminated core 4. Moreover, the resin hole 43 and the communication path 44 are closed by the outermost electromagnetic steel plate 51 at the opening end of the resin hole 43 and the communication path 44 on the second end surface 402 side. It is possible to prevent the resin 7 remaining in 44 from coming out on the second end face 402 of the laminated core 4.

Thus, in the resin filling method, the resin 7 is supplied from the resin hole 43 provided in the laminated iron core 4 to the filling gap 42 via the communication path 44. Thereby, unnecessary portions of the resin 7 are not left on the end surfaces 401 and 402 of the laminated core 4, and the labor for removing the unnecessary portions of the resin 7 can be saved.
Further, the lower mold 2, the upper mold 3, and the transport pallet 22 used when filling the resin 7 are provided with a portion for storing the resin 7 pressurized by the plunger 32 and a flow path (runner, gate, etc.) of the resin 7. There is no need to provide the structure, and the structure of the lower mold 2, the upper mold 3, and the transport pallet 22 can be simplified. In addition, unnecessary resin 7 portions do not remain in the lower mold 2, the upper mold 3, and the transport pallet 22, and the labor of removing the unnecessary resin 7 portions can be saved.

  Therefore, according to the resin filling method and the resin filling apparatus 1 of this example, the structures of the lower mold 2, the upper mold 3, and the transport pallet 22 can be simplified, and the trouble of removing unnecessary resin 7 portions is eliminated. Can be omitted.

The resin hole 43 and the communication path 44 can also be formed in the outermost electromagnetic steel sheet 51. In this case, it is possible to form a path through which the resin 7 passes by closing the resin hole 43 and the communication path 44 by the lower mold 2 or the transfer pallet 22 that can be attached to and detached from the lower mold 2.
Further, the resin hole 43 portion in the outermost electromagnetic steel sheet 51 can be punched out using a punch after the resin 7 is solidified. In this case, the resin hole 43 is formed over the entire length of the laminated iron core 4, and the mass balance of the rotor configured using the laminated iron core 4 is improved.

DESCRIPTION OF SYMBOLS 1 Resin filling apparatus 2 Lower mold | type 22 Transport pallet 3 Upper mold | type 31 Plunger base 32 Plunger 4 Laminated | stacking core 401 1st end surface 402 2nd end surface 41 Magnet arrangement | positioning hole 42 Filling gap 43 Resin hole 44 Communication path 51 Endmost electromagnetic steel plate 52 Second magnetic steel sheet 53 Third magnetic steel sheet 54 Remaining magnetic steel sheet 6 Magnet 7 Resin

Claims (5)

A resin filling method for filling resin into a filling gap formed by arranging magnets in magnet placement holes provided along the axial direction of the laminated iron core of the rotor for a rotating electrical machine,
The laminated iron core is provided with a resin hole along the axial direction of the laminated iron core, and a communication path communicating the resin hole with the magnet arrangement hole.
The above laminated iron core is sandwiched between an upper mold provided with a movable plunger and a lower mold,
By the plunger inserted into the resin hole from the first end surface of the laminated iron core, the molten resin stored in the resin hole is pushed out to the filling gap through the communication path, and the filling gap The resin filling method characterized by filling in. The magnet arrangement hole is formed in a state of penetrating the whole of a plurality of electromagnetic steel sheets laminated in the axial direction of the laminated iron core,
The resin hole is formed on the remaining electrical steel sheets excluding the outermost electrical steel sheet located on the second end surface opposite to the first end surface among the multiple electrical steel plates stacked in the axial direction of the laminated core. Formed,
The communication path is formed in a predetermined number of electromagnetic steel sheets laminated adjacent to the outermost electromagnetic steel sheet,
The opening end on the first end face side in the magnet arrangement hole is closed by the upper mold,
2. The resin filling method according to claim 1, wherein an opening end on the second end face side in the magnet arrangement hole is closed by the lower mold or a transport pallet that can be attached to and detached from the lower mold. The magnet arrangement hole and the resin hole are a plurality of electromagnetic steel plates laminated in the axial direction of the laminated iron core, excluding the outermost electromagnetic steel plate located on the second end surface opposite to the first end surface, Formed in the remaining electrical steel sheet,
The communication path is formed in a predetermined number of electromagnetic steel sheets laminated adjacent to the outermost electromagnetic steel sheet,
The resin filling method according to claim 1, wherein an opening end on the first end face side in the magnet arrangement hole is closed by the upper mold. A solid resin is placed in the resin hole,
The molten resin is melted by heating the laminated iron core, and then the resin is pushed out by the plunger into the filling gap through the communication path. The resin filling method according to any one of the above. A resin filling device that fills resin into a filling gap formed by arranging a magnet in a magnet arrangement hole provided along the axial direction of a laminated iron core of a rotor for a rotating electrical machine,
The laminated iron core is provided with a resin hole along the axial direction of the laminated iron core, and a communication path communicating the resin hole with the magnet arrangement hole.
A lower mold on which the laminated iron core is placed;
A plunger is movably provided, and includes an upper mold that sandwiches the laminated core between the lower mold,
The laminated core is sandwiched between the upper mold and the lower mold, and the molten resin is retained in the resin hole by the plunger inserted into the resin hole from the first end surface of the laminated core. The resin filling device is configured to push the resin into the filling gap through the communication path and fill the filling gap.

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