Manufacturing device of rotor core and manufacturing method of rotor core

Abstract

The present invention provides a rotor core manufacturing device and a rotor core manufacturing method capable of preventing a magnet from moving and causing damage at an end portion thereof when a resin material is injected. The rotor core manufacturing device includes a first mold (7) having an insertion recess (7a) into which a laminated core (2) having a magnet (3) inserted into a magnet insertion hole (2c) is fitted and in which the laminated core (2) is held, a second mold (8) which is engaged with the first mold (7) and which, together with the first mold (7), clamps the laminated core (2) and seals the laminated core (2), a resin injection portion (9) which is provided to the second mold (8) and which injects a resin material (4) into the magnet insertion hole (2c) using a molding machine, and a magnet positioning and holding mechanism (11) which positions and holds the magnet (3) in a state in which the laminated core (2) is fitted to the insertion recess (7a) of the first mold (7).

Description

Technical Field

[0001] This invention relates to an apparatus for manufacturing a rotor core and a method for manufacturing a rotor core. Background Technology

[0002] For example, such as Figure 1 As shown, the IPM type rotor core (embedded magnet type rotor core) 1 is configured to include: a laminated iron core 2 obtained by stacking multiple core components (thin plate-shaped components) formed by punching an electromagnetic steel plate; a permanent magnet 3 inserted into and housed in a magnet insertion hole 2c formed from one end 2a to the other end 2b in the direction of the axis O1 of the laminated iron core 2; and a resin material 4 injected into the magnet insertion hole 2c to embed and fix the permanent magnet 3.

[0003] For example, such as Figure 2 As shown, the SPM type rotor core (surface magnet type rotor core) 5 is configured to include: a laminated iron core 2, permanent magnets 3 arranged at equal intervals along the circumferential direction on the outer peripheral surface of the laminated iron core 2, a cylindrical outer shell member 6 surrounding and covering the laminated iron core 2 together with the permanent magnets 3, and a resin material 4 injected between the outer shell member 6 and the laminated iron core 2 to embed and fix the permanent magnets 3.

[0004] In addition, the laminated iron core 2 has a central hole (shaft hole) 2d formed by extending from one end 2a on its axis O1 to the other end 2b for embedding the rotor.

[0005] On the other hand, for example, such as Figure 8 As shown, the manufacturing apparatus for rotor cores 1 and 5 is configured to include: a first mold 7 having a fitting recess 7a for fitting and holding a laminated iron core 2 (or a laminated iron core 5 with a permanent magnet 3 and a housing member 6 installed) inserted into a magnet insertion hole 2c in the axial direction O1; a second mold 8 that engages with the first mold 7 and together with the first mold 7 closes / seals the laminated iron core 2 in the mold cavity; and a resin injection section 9 provided in the second mold 8 (or the first mold 7) for injecting resin material 4 into the magnet insertion hole 2c (or between the housing member 6 and the laminated iron core 2) of the laminated iron core 2 in the mold cavity (for example, see Patent Document 1). The first mold 7 integrally includes a mandrel 10 for positioning and holding the laminated iron core 2 by inserting it into the center hole (shaft hole) 2d of the laminated iron core 2 when the laminated iron core 2 is fitted into the fitting recess 7a.

[0006] like Figure 8 , Figure 9 As shown, during the manufacturing of rotor cores 1 and 5, after sealing the laminated iron core 2 by closing the first mold 7 and the second mold 8, as... Figure 10As shown, using an injection molding machine, resin material 4 is injected from the resin injection section 9 into the magnet insertion hole 2c (or between the outer shell component 6 and the laminated iron core 2). Figure 11 As shown, the first mold 7 and the second mold 8 are opened at the appropriate time, and the rotor core 1 (5) is demolded and removed. Thus, a rotor core 1 (5) is manufactured by embedding and fixing the permanent magnet 3 using resin material 4.

[0007] Patent Document 1: Publication No. WO2016 / 147211 Summary of the Invention

[0008] The problem the invention aims to solve

[0009] On the other hand, such as Figure 12 As shown, in the above-mentioned conventional rotor core manufacturing apparatus and manufacturing method, when the resin material 4 is injected into the magnet insertion hole 2c, the magnet 3 moves due to the injection pressure, causing one end 3a of the magnet 3 to come into contact (impact) with the mold surface 7b, which may cause damage such as cracks in the magnet 3.

[0010] Therefore, a method is desired to prevent the magnet 3 from being damaged by impact with the mold surface 7b under the injection pressure of the resin material 4.

[0011] Solution for solving the problem

[0012] As a technical solution of the rotor core manufacturing apparatus disclosed herein, it includes: a first mold having a fitting recess for fitting and holding a stacked iron core in which a magnet is inserted into a magnet insertion hole, or a stacked iron core with a magnet and a housing component mounted on its outer periphery; a second mold engaging with the first mold and together with the first mold closing and sealing the stacked iron core; a resin injection section disposed in the first mold or the second mold, for injecting resin material into the magnet insertion hole or between the housing component and the stacked iron core using a molding machine; and a magnet positioning and holding mechanism for positioning and holding the magnet when the stacked iron core is fitted into the fitting recess of the first mold.

[0013] As a technical solution of the rotor core manufacturing method disclosed herein, the rotor core manufacturing apparatus described above is used to inject resin material into the magnet insertion hole or between the outer shell component and the laminated iron core while the magnet is positioned and held by the magnet positioning and holding mechanism.

[0014] The effects of the invention

[0015] According to the above-mentioned technical solution, the magnet inserted into the magnet insertion hole is positioned and held in a state where the end of the magnet is separated from the mold surface and abuts against the mold surface, which can prevent the magnet from moving under the injection pressure of the resin material. Therefore, it is possible to reliably prevent the end of the magnet from impacting the mold surface under the injection pressure of the resin material and causing damage to the magnet. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view showing a rotor (rotor structure) according to one embodiment.

[0017] Figure 2 This is a perspective view of a rotor core (IPM type rotor core) according to one embodiment.

[0018] Figure 3 This is a cross-sectional view showing a manufacturing apparatus and manufacturing method for a rotor core (IPM type rotor core) according to one embodiment.

[0019] Figure 4 This is a cross-sectional view showing the manufacturing apparatus and manufacturing method of the rotor core (IPM type rotor core) of the first embodiment.

[0020] Figure 5 This is a cross-sectional view showing the manufacturing apparatus and manufacturing method of the rotor core (IPM type rotor core) of the first embodiment.

[0021] Figure 6 This is an enlarged view of the guide plate and protrusion of the manufacturing apparatus for the rotor core (IPM type rotor core) of the second embodiment.

[0022] Figure 7 This is a cross-sectional view showing the manufacturing apparatus and manufacturing method of the rotor core (IPM type rotor core) of the second embodiment.

[0023] Figure 8 It is a cross-sectional view showing the manufacturing apparatus and manufacturing method of an existing rotor core (IPM type rotor core).

[0024] Figure 9 It is a cross-sectional view showing the manufacturing apparatus and manufacturing method of an existing rotor core (IPM type rotor core).

[0025] Figure 10 It is a cross-sectional view showing the manufacturing apparatus and manufacturing method of an existing rotor core (IPM type rotor core).

[0026] Figure 11 It is a cross-sectional view showing the existing rotor (rotor structure).

[0027] Figure 12It is a cross-sectional view showing the manufacturing apparatus and method of an existing rotor core (IPM type rotor core), which shows the impact of the end of the magnet with the mold surface when the resin material is injected.

[0028] Explanation of reference numerals in the attached figures

[0029] 1. IPM type rotor core; 2. Laminated iron core; 2a. One end; 2b. The other end; 2c. Magnet insertion hole; 2d. Center hole (shaft hole); 3. Permanent magnet; 4. Resin material; 5. SPM type rotor core; 6. Outer shell component; 7. First mold; 7a. Fitting recess; 7b. Mold surface; 8. Second mold; 9. Resin injection part; 10. Core rod; 11. Magnet positioning and holding mechanism; 11a. Electromagnet; 11b. Manufacturing fixture; 11c. Pressing pin (mechanical magnet pressing mechanism); A. Rotor core manufacturing apparatus; O1. Axis. Detailed Implementation

[0030] The following is for reference Figures 1-5 The rotor core manufacturing apparatus and rotor core manufacturing method of the first embodiment will be described.

[0031] Here, as Figure 1 , Figure 2 As shown, the rotor cores 1 and 5 of this embodiment are coaxially mounted with the shaft by passing through a central hole (shaft hole) 2d formed by the shaft through the center of the axis O1 of the rotor cores 1 and 5 of this embodiment, thereby constituting the rotor of an electric rotating machine such as an electric motor of an automobile or an electrified product.

[0032] In this embodiment, the structure of rotor core 1 is described as an IPM type rotor core (embedded magnet type rotor core).

[0033] For example, such as Figure 1 As shown, the rotor core 1 of this embodiment is configured to include: a stacked iron core (core) 2 formed by stacking multiple core components (thin plate-shaped components) formed by punching an electromagnetic steel plate; a permanent magnet (magnet) 3 arranged in a plurality of magnet insertion holes 2c formed from one end 2a to the other end 2b in the direction of the axis O1 of the stacked iron core 2; and a resin material 4 injected into the magnet insertion holes 2c to fix the permanent magnet 3 and embed it in the stacked iron core 2.

[0034] like Figure 3 , Figure 4 , Figure 5As shown, the apparatus (rotor core manufacturing apparatus) A for manufacturing the rotor core 1 of this embodiment with the above-described structure includes: a first mold 7 having a fitting recess 7a and a cylindrical mandrel 10, the fitting recess 7a fitting and holding the laminated iron core 2 into which a permanent magnet 3 is inserted in a magnet insertion hole 2c, the mandrel 10 fitting into a central hole 2d formed through the laminated iron core 2 in the direction of axis O1; a second mold 8 that engages with the first mold 7 and together with the first mold 7 molds and seals the laminated iron core 2; a resin injection section 9 provided in the second mold 8, which injects resin material 4 into the magnet insertion hole 2c using an injection molding machine; and a magnet positioning and holding mechanism 11 for positioning and holding the permanent magnet 3 inserted into the magnet insertion hole 2c.

[0035] The resin injection section 9 provided in the second mold 8 is configured to include a resin flow path for conveying resin material 4 from the injection molding machine and supplying and injecting resin material 4 into the magnet insertion hole 2c of the stacked iron core 2 which has been molded by the first mold 7 and the second mold 8.

[0036] like Figure 4 As shown, the main components of the magnet positioning and holding mechanism 11 of this embodiment are a manufacturing jig 11b including at least one of an electromagnet 11a, a permanent magnet, and an air attraction mechanism. The magnet positioning and holding mechanism 11 is configured such that, with the laminated iron core 2 fitted into the fitting recess 7a of the first mold 7, the magnetic force of the electromagnet 11a or the permanent magnet of the manufacturing jig 11b, and the air attraction force of the air attraction mechanism, act on the permanent magnet 3 inserted into the magnet insertion hole 2c, thereby positioning and holding the permanent magnet 3 by attracting it towards the other end 2b of the laminated iron core 2. Furthermore, in Figure 4 The diagram shows a case where the magnet positioning and holding mechanism 11 includes an electromagnet 11a.

[0037] Or, such as Figure 5As shown, the magnet positioning and holding mechanism 11 of this embodiment can also be configured to extend through the fitting recess 7a from the outside of the first mold 7. With the laminated iron core 2 fitted into the fitting recess 7a of the first mold 7, a pressing force is applied to the end 3a of the permanent magnet 3 inserted into the magnet insertion hole 2c, on the side of the end 2a of the laminated iron core 2. The permanent magnet 3 is then positioned inside the magnet insertion hole 2c on the other end 2b side of the laminated iron core 2. For a magnet positioning and holding mechanism 11 provided with a first mold 7 like this, examples include mechanical magnet pressing mechanisms 11c such as pressing pins. For instance, if a pressing pin (11c) is inserted into the magnet insertion hole 2 to press the permanent magnet 3 toward the other end 2b side of the laminated iron core 2 and hold the permanent magnet 3, the permanent magnet 3 can be positioned and held. Furthermore, the mechanical magnet pressing mechanism 11c is not limited to a pressing pin.

[0038] Next, a method for manufacturing the rotor core 1 using the manufacturing apparatus A of the rotor core 1 of this embodiment, which is composed of the above-described structure (a method of injecting resin material 4 to embed and fix the permanent magnet 3 to the laminated iron core 2 to form a whole) will be described.

[0039] First, the permanent magnets 3 are inserted into the multiple magnet insertion holes 2c of the stacked iron core 2 (magnet insertion process).

[0040] Next, the stacked iron core 2 is fitted into the fitting recess 7a of the first mold 7 to be configured (first mold installation process).

[0041] Next, as Figure 4 As shown, a manufacturing jig 11b is arranged on the other end 2b side of the stacked iron core 2, and the magnetic force of the electromagnet 11a, the magnetic force of the permanent magnet, or the attractive force of the air attraction mechanism is applied to the permanent magnet 3. The permanent magnet 3 inserted into the magnet insertion hole 2c is attracted to the other end 2b side of the stacked iron core 2, and the permanent magnet 3 is positioned and held by the magnetic force and the attractive force (magnet positioning and holding process).

[0042] Here, in the case where the manufacturing jig 11b, which is configured to act on the permanent magnet 3 by the magnetic force of the electromagnet 11a, the magnetic force of the permanent magnet, or the attractive force of the air attraction mechanism, is used to position and hold the permanent magnet 3 in the stacked iron core 2, during the stage of inserting the permanent magnet 3 into the multiple magnet insertion holes 2c, and in this state, the stacked iron core 2 is fitted into the fitting recess 7a of the first mold 7. That is, the magnet positioning and holding process can also be performed before the first mold installation process.

[0043] Furthermore, in this case, for example, when the robot is used to transport the laminated iron core 2 after the permanent magnet 3 has been inserted into the fitting recess 7a of the first mold 7 and to fit the laminated iron core 2, since the permanent magnet 3 in the magnet insertion hole 2c is held in advance by the magnetic force and air attraction force of the manufacturing jig 11b, it is also possible to prevent the permanent magnet 3 from coming out of the magnet insertion hole 2c of the laminated iron core 2.

[0044] On the other hand, such as Figure 5 As shown, when the mechanical magnet pressing mechanism 11c, including a pressing pin, is used, after the stacked iron core 2 is fitted into the fitting recess 7a of the first mold 7, for example, the pressing pin (11c) is inserted into the magnet insertion hole 2c to press the permanent magnet 3 toward the other end 2b side of the stacked iron core 2, and the permanent magnet 3 is positioned and held (magnet positioning and holding process).

[0045] Next, the second mold 8 is joined with the first mold 7, and together with the first mold 7, the stacked iron core 2 is closed and sealed (second mold installation process).

[0046] Then, resin material 4 is injected into the magnet insertion hole 2c via the resin injection section 9 provided in the second mold 8 using an injection molding machine (resin injection process).

[0047] At this time, since the permanent magnet 3 in the magnet insertion hole 2c is positioned and held by the magnet positioning and holding mechanism 11, the resin material 4 can be filled into the magnet insertion hole 2c in such a way that the permanent magnet 3 will not move toward the mold surface 7b side of the first mold 7 due to the injection pressure (injection pressure) of the resin material 4.

[0048] Next, molds 7 and 8 are opened at the appropriate time, and rotor core 1 is demolded. In addition, manufacturing jigs and the like are used to manufacture other rotor cores 1.

[0049] Therefore, in the rotor core 1 manufacturing apparatus A and rotor core 1 manufacturing method of this embodiment, since the permanent magnet 3 inserted into the magnet insertion hole 2c of the laminated iron core 2 is attracted or pressed into the other end 2b side (the injection port side of the resin material 4) of the laminated iron core 2 by the magnet positioning and holding mechanism, and the permanent magnet 3 is positioned and held, the permanent magnet 3 will not move towards the mold surface 7b side of the first mold 7 due to the injection pressure (injection pressure) of the resin material 4.

[0050] Therefore, according to the rotor core 1 manufacturing apparatus A and the rotor core 1 manufacturing method of this embodiment, it is possible to reliably prevent damage to the permanent magnet 3 from occurring as in the past, where the permanent magnet 3 moves within the magnet insertion hole 2c under the action of injection pressure during the injection of resin material 4, causing the end 3a of the permanent magnet 3 to collide with the mold surface 7b. Thus, a high-quality, highly reliable rotor core 1 can be manufactured. Furthermore, it is also possible to improve the manufacturing efficiency of the rotor core 1.

[0051] In addition, the manufacturing apparatus A of the rotor core 1 in this embodiment can also be used to prevent the permanent magnet 3 from coming out of the magnet insertion hole 2c during the period until the stacked iron core 2 with the permanent magnet 3 inserted into the magnet insertion hole 2c of the stacked iron core 2 is transported to the first mold 7 and the stacked iron core 2 is fitted into the fitting recess 7a.

[0052] The first embodiment of the rotor core manufacturing apparatus and the rotor core manufacturing method has been described above, but the present invention is not limited to the first embodiment described above, and appropriate modifications can be made without departing from its spirit.

[0053] For example, in this embodiment, the rotor core is described as an IPM type rotor core (embedded magnet type rotor core), but it can also be an SPM type rotor core (surface magnet type rotor core).

[0054] Specifically, for example, such as Figure 2 As shown, the SPM type rotor core 5 is configured to include: a laminated iron core 2, permanent magnets 3 arranged at equal intervals along the circumferential direction on the outer peripheral surface of the laminated iron core 2, a cylindrical outer shell member 6 surrounding and covering the laminated iron core 2 together with the permanent magnets 3, a resin material 4 injected between the outer shell member 6 and the laminated iron core 2 to embed and fix the permanent magnets 3, and a magnet positioning and holding mechanism 11.

[0055] When manufacturing the SPM-type rotor core 5, the same as in this embodiment, a manufacturing jig 11c and a pressing pin (mechanical magnet pressing mechanism 11) are used to attract or press the magnet 3 located between the outer shell member 6 and the laminated iron core 2, and to position and hold the magnet 3. Therefore, when the permanent magnet 3 is embedded and fixed by injecting resin material from the resin injection section 9 between the outer shell member 6 and the laminated iron core 2, the permanent magnet 3 will not move, and the same effect as in this embodiment can be obtained.

[0056] Next, refer to Figure 1 , Figure 3 , Figure 6 , Figure 7 The manufacturing apparatus A and the manufacturing method of the rotor core according to the second embodiment will be described.

[0057] In this embodiment, the only differences from the first embodiment are the structure of the magnet positioning and holding mechanism 11 and the position in which the permanent magnet 3 is positioned and held inside the magnet insertion hole 2c of the laminated iron core 2. Therefore, the same reference numerals are used for the same structures as in the first embodiment, and detailed descriptions thereof are omitted.

[0058] In this embodiment, the magnet positioning and holding mechanism 11 does not, as in the first embodiment, attract or press the permanent magnet 3 inserted into the magnet insertion hole 2c of the laminated iron core 2 toward the other end 2b of the laminated iron core 2 by separating one end 3a of the permanent magnet 3 from the mold surface 7b, and thus position and hold the permanent magnet 3. Instead, it is as follows: Figure 6 , Figure 7 As shown, the permanent magnet 3 is configured to attract or press the permanent magnet 3 by directly (or indirectly) abutting one end 3a of the permanent magnet 3 against the mold surface 7b of the first mold 7, and to position and hold the permanent magnet 3.

[0059] Specifically, such as Figure 6 As shown, the magnet positioning and holding mechanism 11 of this embodiment takes at least one of an electromagnet 11a, a permanent magnet, or an air attraction mechanism provided at a predetermined position in the first mold 7 as its main components. It is configured such that when the stacked iron core 2 is fitted into the fitting recess 7a of the first mold 7, the magnetic force of the electromagnet or the permanent magnet and the air attraction force of the air attraction mechanism act on the permanent magnet 3 inserted into the magnet insertion hole 2c, so as to attract the permanent magnet 3 towards one end 2a of the stacked iron core 2, thereby causing one end 3a of the permanent magnet 3 to directly or indirectly abut against the mold surface 7b to position and hold the permanent magnet 3.

[0060] Alternatively, the magnet positioning and holding mechanism 11 of this embodiment may also be configured such that, with the stacked iron core 2 fitted into the fitting recess 7a of the first mold 7, the permanent magnet 3 is inserted into the magnet insertion hole 2c from the other end 2b side of the stacked iron core 2, and force is applied to the other end 3b of the permanent magnet 3 to press the permanent magnet 3 deeper into the magnet insertion hole 2c until one end 3a of the permanent magnet 3 abuts against the mold surface 7b to position and hold the permanent magnet 3.

[0061] As such a magnet positioning and holding mechanism 11, for example, it is configured to press the permanent magnet 3 in and hold it by inserting a pressing pin (mechanical magnet pressing mechanism 11c) into the magnet insertion hole 2c. Alternatively, it may be configured to include an electromagnet, a permanent magnet, an air pressing mechanism, etc., and press the permanent magnet 3 in by blowing air into the magnet insertion hole 2c or by using the repulsive force of the magnetic force.

[0062] The method for manufacturing the rotor core 1 using the manufacturing apparatus A of the rotor core 1 of this embodiment with the structure described above (a method of embedding and fixing the permanent magnet 3 to the laminated iron core 2 by injecting resin material 4 to form a whole) will be described.

[0063] First, the permanent magnets 3 are inserted into the multiple magnet insertion holes 2c of the stacked iron core 2 (magnet insertion process).

[0064] Next, the stacked iron core 2 is fitted into the fitting recess 7a of the first mold 7 to be configured (first mold installation process).

[0065] Here, when an electromagnet 11a, a permanent magnet, and an air attraction mechanism are used as the magnet positioning and holding mechanism 11, the magnetic force of the electromagnet 11a, the magnetic force of the permanent magnet, or the attractive force of the air attraction mechanism acts on the permanent magnet 3, causing the permanent magnet 3 to be attracted toward the mold surface 7b and positioned and held in a state where one end 3a abuts against the mold surface 7b (magnet positioning and holding process).

[0066] On the other hand, when a mechanical magnet pressing mechanism 11c, such as a pressing pin, or an air pressing mechanism is used as the magnet positioning and holding mechanism 11, the pressing pin is pressed into the magnet insertion hole 2c from the other end 2b of the laminated iron core 2, or air is blown in to press the permanent magnet 3 into the depth of the magnet insertion hole 2c. Then, the permanent magnet 3 is positioned and held in a state where one end 3a abuts against the mold surface 7b (magnet positioning and holding process).

[0067] Next, the second mold 8 is joined with the first mold 7, and together with the first mold 7, the stacked iron core 2 is closed and sealed (second mold installation process).

[0068] Then, resin material 4 is injected into the magnet insertion hole 2c via the resin injection section 9 provided in the second mold 8 using an injection molding machine (resin injection process).

[0069] At this time, since the permanent magnet 3 in the magnet insertion hole 2c is positioned and held by the magnet positioning and holding mechanism so that one end 3a abuts against the mold surface 7b of the first mold 7, the permanent magnet 3 will not move toward the mold surface 7b of the first mold 7 due to the injection pressure (injection pressure) of the resin material 4.

[0070] Next, molds 7 and 8 are opened at the appropriate time, and rotor core 1 is demolded.

[0071] Therefore, in the rotor core 1 manufacturing apparatus A and rotor core 1 manufacturing method of this embodiment, the permanent magnet 3 inserted into the magnet insertion hole 2c of the laminated iron core 2 is attracted or pressed towards the mold surface 7b side located at one end 2a side of the laminated iron core 2 by using the magnet positioning and holding mechanism, and the permanent magnet 3 is positioned and held, so the permanent magnet 3 will not move towards the mold surface 7b side of the first mold 7 due to the injection pressure (injection pressure) of the resin material 4.

[0072] Therefore, according to the rotor core 1 manufacturing apparatus A and the rotor core 1 manufacturing method of this embodiment, it is possible to reliably prevent damage to the permanent magnet 3 from occurring as in the past, where the permanent magnet 3 moves within the magnet insertion hole 2c under the action of injection pressure during the injection of resin material 4, causing the end 3a of the permanent magnet 3 to collide with the mold surface 7b. Thus, a high-quality, highly reliable rotor core 1 can be manufactured. Furthermore, it is also possible to improve the manufacturing efficiency of the rotor core 1.

[0073] The second embodiment of the rotor core manufacturing apparatus and the rotor core manufacturing method has been described above. However, the present invention is not limited to the above-described second embodiment and may be implemented in various ways, including variations of the first embodiment.

Claims

1. An apparatus for manufacturing a rotor core, wherein, The apparatus for manufacturing the rotor core includes: The first mold has a fitting recess for fitting and holding a stacked iron core into which a magnet is inserted in a magnet insertion hole, or into which a magnet and a housing component are mounted on the outer periphery. The second mold engages with the first mold and, together with the first mold, closes the laminated iron core and seals the laminated iron core. A resin injection section, located in either the first or second mold, injects resin material into the magnet insertion hole or between the outer casing component and the laminated iron core using a molding machine; and A magnet positioning and holding mechanism, which positions and holds the magnet inserted into the magnet insertion hole when the stacked iron core is fitted into the fitting recess of the first mold. The magnet positioning and holding mechanism is configured to attract the magnet toward the end side of the stacked iron core facing the second mold, such that the end of the magnet is separated from the mold surface forming the fitting recess of the first mold, rather than attracting or pressing the magnet toward the mold surface forming the fitting recess of the first mold, thereby positioning and holding the magnet.

2. The rotor core manufacturing apparatus according to claim 1, wherein, The magnet positioning and holding mechanism includes any one of an electromagnet, a permanent magnet, or an air attraction mechanism.

3. A method for manufacturing a rotor core, wherein, The method for manufacturing the rotor core uses the rotor core manufacturing apparatus according to claim 1 or 2, wherein, with the magnet positioned and held by the magnet positioning and holding mechanism, resin material is injected into the magnet insertion hole or between the outer shell component and the laminated iron core.

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