Method for manufacturing rotor

Abstract

To provide a method for manufacturing a rotor, in which productivity of the rotor can be improved.SOLUTION: A manufacturing device 40 includes a stationary mold 50 and a movable mold 70 that sandwich and clamp a plurality of rotor cores 11 with magnets 20 stored in slots 14 in an axial direction. The stationary mold 50 has a plurality of biasing portions 53 that respectively bias the plurality of rotor cores 11 toward the movable mold 70. The movable mold 70 has a plurality of second through-holes 72a through which a resin material 30 is supplied to the respective slots 14 of the plurality of rotor cores 11. The stationary mold 50 and the movable mold 70 collectively sandwich and clamp the plurality of rotor cores 11 against biasing forces of the plurality of biasing portions 53.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a rotor manufacturing apparatus. [Background technology]

[0002] A rotor for a rotating electric machine includes a cylindrical rotor core and a plurality of magnets. The rotor core has a plurality of slots that penetrate in the axial direction. Each slot houses a magnet. Each magnet is fixed to the rotor core by a resin material that fills the slot.

[0003] The rotor manufacturing apparatus described in Patent Document 1 includes a fixed mold, a movable mold having a resin inlet, and a cull plate having a filling pot. The fixed mold supports the lower surface of the rotor core. The cull plate is placed on the upper surface of the rotor core. The movable mold contacts the upper surface of the cull plate.

[0004] A thermosetting resin material is supplied to the resin inlet of the movable mold. The resin material in the resin inlet is melted by the heat of the device and then pushed out by the plunger. This causes the resin material to fill the slot through the filling pot of the cull plate and solidify. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2019-161850 Summary of the Invention [Problem to be solved by the invention]

[0006] In the rotor manufacturing apparatus described in Patent Document 1, it is desired to improve rotor productivity. [Means for solving the problem]

[0007] A rotor manufacturing device for solving the above problem is an apparatus for manufacturing multiple rotors at once, the multiple rotors each having a cylindrical rotor core with slots penetrating in the axial direction, magnets housed in the slots, and a resin material filled in the slots to fix the magnets to the rotor core, the device comprising a first mold and a second mold that clamp the multiple rotor cores with the magnets housed in the slots in the axial direction and clamp them together, the first mold has a plurality of biasing portions that respectively bias the multiple rotor cores toward the second mold, and either the first mold or the second mold has a plurality of supply paths that supply the resin material to the slots of each of the multiple rotor cores, and the first mold and the second mold clamp the multiple rotor cores together against the biasing forces of the multiple biasing portions.

[0008] According to the above configuration, the first and second dies clamp the rotor cores together in the axial direction against the biasing forces of the biasing parts. In this state, resin material is supplied through the supply passages to the slots containing the magnets, thereby fixing the magnets to the rotor cores.

[0009] Here, when the first and second dies clamp multiple rotor cores together and clamp them together, if the multiple rotor cores have different axial dimensions, the following problem may occur: That is, a rotor core with a small axial dimension may not be clamped by the first and second dies. In this case, the difference in dimensions of the multiple rotor cores may cause gaps to form inside the manufacturing device during clamping, allowing resin material to leak out.

[0010] In this regard, according to the above configuration, the multiple rotor cores are each biased toward the second mold by multiple biasing portions. Therefore, the multiple biasing portions absorb the dimensional differences between the multiple rotor cores, making it less likely that gaps will form in the manufacturing device that allow the resin material to leak when the molds are closed. This allows multiple rotors to be manufactured at the same time. Therefore, rotor productivity can be improved. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a perspective view of a rotor according to the first embodiment. [Figure 2] FIG. 2 is a cross-sectional view of the rotor of FIG. [Figure 3] FIG. 3 is a cross-sectional view of the rotor manufacturing apparatus according to the first embodiment. [Figure 4] FIG. 4 is an enlarged cross-sectional view of FIG. [Figure 5] FIG. 5 is a cross-sectional view of the first embodiment showing a state in which the intermediate plate is in contact with the cull plate. [Figure 6] FIG. 6 is a cross-sectional view showing a state in which the fixed mold and the movable mold are clamped together in the first embodiment. [Figure 7] FIG. 7 is a cross-sectional view of the first embodiment showing a state in which the resin material is filled in the slot. [Figure 8] FIG. 8 is a cross-sectional view of a rotor manufacturing apparatus according to the second embodiment. [Figure 9] FIG. 9 is a cross-sectional view showing a state in which the support member is in contact with the cull plate in the second embodiment. [Figure 10] FIG. 10 is a cross-sectional view showing a state in which the fixed mold and the movable mold are clamped together in the second embodiment. [Figure 11] FIG. 11 is a cross-sectional view showing a state in which the resin material is filled in the slot in the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0012] [First embodiment] A first embodiment of a rotor manufacturing apparatus will be described below with reference to FIGS. First, a rotor 10 manufactured by the rotor manufacturing apparatus of this embodiment (hereinafter referred to as manufacturing apparatus 40) will be described.

[0013] (Rotor 10) 1 and 2, the rotor 10 includes a rotor core 11, a plurality of magnets 20, and a plurality of resin materials 30. The rotor 10 is used, for example, in an embedded magnet motor.

[0014] The rotor core 11 has a substantially cylindrical shape and is formed by laminating a plurality of core pieces 12 that are punched out from electromagnetic steel sheets, for example. Hereinafter, the axial direction of rotor core 11 will be simply referred to as the axial direction, the radial direction of rotor core 11 will be simply referred to as the radial direction, and the circumferential direction of rotor core 11 will be simply referred to as the circumferential direction.

[0015] The rotor core 11 has a first end face 11a and a second end face 11b located on opposite sides in the axial direction. The rotor core 11 has a central hole 13 and a plurality of slots 14. A shaft (not shown) is inserted into the central hole 13. The plurality of slots 14 are formed at intervals from one another in the circumferential direction.

[0016] The central hole 13 and the slots 14 pass through the rotor core 11 in the axial direction. That is, the central hole 13 and the slots 14 are both open to the first end face 11a and the second end face 11b.

[0017] 1, the center hole 13 has a substantially circular shape in a plan view. Two keys 13a that protrude radially opposite each other are provided on the inner surface of the center hole 13. The two keys 13a fit into key grooves provided in a shaft (not shown), thereby restricting relative movement between the rotor core 11 and the shaft in the circumferential direction.

[0018] The cross-sectional shape of the slot 14 perpendicular to the axial direction is a substantially rectangular shape having long and short sides, and the cross-sectional shape of the slot 14 is the same throughout the axial direction. The magnets 20 are housed one per slot 14. The magnets 20 are fixed to the rotor core 11 via a resin material 30 filled in the slots 14.

[0019] The magnet 20 is, for example, a permanent magnet. The magnet 20 has an elongated shape that is long in the axial direction. The length of the magnet 20 in the axial direction is shorter than the length of the rotor core 11 in the axial direction. The cross section of the magnet 20 perpendicular to the axial direction is substantially rectangular.

[0020] One axial end face of magnet 20 is located, for example, more inward in the axial direction than first end face 11a. The other axial end face of magnet 20 opposite to the one axial end face is, for example, flush with second end face 11b.

[0021] The resin material 30 is filled, for example, between the inner surface of the slot 14 and the outer surface of the magnet 20 over the entire periphery of the magnet 20 . The resin material 30 covers one end face of the magnet 20 in the axial direction, and is formed flush with the first end face 11a of the rotor core 11.

[0022] The resin material 30 is, for example, a thermosetting resin. (Manufacturing equipment 40) As shown in Fig. 3, the manufacturing apparatus 40 includes a fixed mold 50 and a movable mold 70 configured to be capable of clamping and opening. The movable mold 70 is disposed above the fixed mold 50. The movable mold 70 is configured to be able to move forward and backward in the vertical direction relative to the fixed mold 50. The fixed mold 50 is an example of a "first mold." The movable mold 70 is an example of a "second mold."

[0023] The manufacturing apparatus 40 includes a plurality of cull plates 80 that are placed on the first end faces 11a of the plurality of rotor cores 11. The fixed mold 50 and the movable mold 70 clamp the plurality of rotor cores 11 together via the plurality of cull plates 80.

[0024] The manufacturing apparatus 40 is an apparatus for manufacturing a plurality of rotors 10 in a batch by filling and solidifying resin material 30 into slots 14 of a plurality of rotor cores 11 arranged between a fixed mold 50 and a movable mold 70. The manufacturing apparatus 40 of this embodiment is an apparatus for manufacturing two rotors 10 in a batch.

[0025] (Fixed type 50) The fixed mold 50 includes a support base 51, two end blocks 52, two support jigs 60, two biasing portions 53, and two positioning portions 56.

[0026] The support base 51 has a flat upper surface, on which a plurality of accommodating recesses 51a are formed, each of which accommodates a biasing member 55 (described later). Each end block 52 protrudes from the support base 51 toward the movable die 70. Each end block 52 comes into contact with the movable die 70 when the die is clamped, thereby defining the bottom dead center of the movable die 70.

[0027] The two support jigs 60 support the two rotor cores 11 from below, respectively. The support jigs 60 are configured to be movable relative to the support base 51. The support jigs 60 also function as transport jigs that transport the rotor cores 11 in a supported state before and after the manufacturing of the rotor 10 by the manufacturing apparatus 40.

[0028] As shown in Fig. 4, the support jig 60 has a base plate 61, a post 62, and a spacer 64. The base plate 61 is flat. The post 62 protrudes upward from the center of the base plate 61. The spacer 64 is placed on the base plate 61 and supports the second end surface 11b of the rotor core 11.

[0029] The base plate 61 has a plurality of through holes 61a that penetrate in the thickness direction of the plate. The plurality of through holes 61a are provided at intervals from one another so as to surround the post 62. The post 62 is cylindrical. The post 62 passes through the spacer 64. The post 62 is inserted into the central hole 13 of the rotor core 11. An unillustrated key groove is provided on the outer peripheral surface of the post 62, into which a key 13a (see FIG. 1) of the rotor core 11 engages. The rotor core 11 is positioned relative to the support jig 60 by the key 13a engaging with the key groove. A plurality of positioning pins 63 are provided on the tip surface of the post 62.

[0030] The spacer 64 is shaped like a flat plate. The spacer 64 has a central hole 64a into which the post 62 is inserted. Although not shown, the spacer 64 is provided so as to be able to move up and down along the post 62 by an elevating mechanism that moves up and down within the through-hole 61a of the base plate 61. The rotor core 11 is removed from the support jig 60 by the spacer 64 rising relative to the post 62.

[0031] 3, the two biasing portions 53 respectively bias the two support jigs 60 toward the movable die 70. More specifically, each biasing portion 53 biases the rotor core 11 toward the movable die 70 via the support jigs 60.

[0032] Each of the biasing sections 53 has a plurality of support members 54 and a plurality of biasing members 55. The plurality of support members 54 support the support jig 60 from below. The plurality of support members 54 are provided at intervals from one another along the outer periphery of the support jig 60. The plurality of biasing members 55 bias the plurality of support members 54 toward the movable die 70, respectively. The biasing members 55 are, for example, compression coil springs.

[0033] The biasing member 55 is accommodated in the accommodation recess 51a of the support base 51. One end of the biasing member 55 is connected to the bottom of the accommodation recess 51a. The other end of the biasing member 55 opposite to the one end is connected to the support member 54.

[0034] The two biasing portions 53 have the same biasing force. More specifically, the two biasing portions 53 have the same composite spring constant. The two positioning portions 56 respectively position the two support jigs 60. The positioning portions 56 have a pair of guide rails 57 protruding from the upper surface of the support base 51. The pair of guide rails 57 are located on opposite sides of the support jig 60 in the planar direction of the upper surface of the support base 51 and extend parallel to each other. The upper ends of the pair of guide rails 57 protrude in directions approaching each other so as to cover the ends of the base plate 61 from above (see FIG. 4).

[0035] The support jig 60 is movable between the pair of guide rails 57 along the guide rails 57. The support jig 60 is positioned relative to the support base 51 by being disposed between the pair of guide rails 57. The two positioning portions 56 restrict the two support jigs 60 from moving in directions approaching each other.

[0036] (Movable type 70) The movable mold 70 includes a pressure plate 71 , an intermediate plate 72 , and a plurality of plungers 74 .

[0037] The pressure plate 71 is applied with a clamping force for clamping the fixed mold 50 and the movable mold 70 together. The pressure plate 71 has a plurality of first through holes 71a into which the plurality of plungers 74 are respectively inserted. The first through holes 71a penetrate the pressure plate 71 in the plate thickness direction.

[0038] The intermediate plate 72 is disposed below the pressure plate 71. The intermediate plate 72 is connected to the pressure plate 71 by a connecting member (not shown) so as to be able to move up and down. The intermediate plate 72 has a plurality of second through holes 72a into which the plurality of plungers 74 are respectively inserted. The second through holes 72a penetrate the intermediate plate 72 in the plate thickness direction. The second through holes 72a are provided at positions corresponding to the first through holes 71a.

[0039] Pellets of resin material 30 are placed in the second through holes 72a (see FIG. 5). The resin material 30 melts inside the second through holes 72a due to, for example, the heat of the manufacturing apparatus 40. The second through holes 72a function as passages for supplying the resin material 30 to the slots 14 of the rotor core 11 via connection passages 81 of a cull plate 80, which will be described later. The second through holes 72a are an example of a "supply passage."

[0040] The intermediate plate 72 has opposing portions 73 that face each end block 52 in the vertical direction. The opposing portions 73 come into contact with the end blocks 52 when the molds are clamped. The plunger 74 is configured to be able to protrude from and retract into the lower surface of the pressure plate 71. The plunger 74 pressurizes the molten resin material 30 inside the second through-hole 72a, filling it into the slot .

[0041] (Calplate 80) 4, the cull plate 80 is placed on the first end face 11a of the rotor core 11 supported by the support jig 60. The cull plate 80 has a plurality of connection paths 81 that connect the second through holes 72a of the intermediate plate 72 and the slots 14.

[0042] The connecting passage 81 has a runner portion 82 and a communication hole 83. The runner portion 82 opens to the top surface of the cull plate 80. The communication hole 83 opens to the bottom surface of the runner portion 82 and penetrates the cull plate 80 in the thickness direction. The communication hole 83 connects the runner portion 82 and the slot 14.

[0043] Culplate 80 has a recess 84 and a positioning hole 85. Recess 84 opens to the lower surface of the center of cull plate 80. Positioning hole 85 opens to the upper surface of recess 84 and penetrates cull plate 80 in the thickness direction.

[0044] The tip of the post 62 is inserted into the recess 84. The positioning pin 63 of the post 62 is inserted into the positioning hole 85. By inserting the positioning pin 63 into the positioning hole 85, the cull plate 80 is positioned relative to the support jig 60. This allows the connection path 81 and the slot 14 to communicate with each other.

[0045] (Manufacturing procedure for rotor 10) Next, a manufacturing procedure for the rotor 10 using the manufacturing apparatus 40 will be described using an example in which two rotors 10 having different axial dimensions within the range of the manufacturing tolerance of the rotor 10 are manufactured.

[0046] Hereinafter, of the two rotor cores 11 having different axial dimensions, the larger rotor core 11 may be referred to as rotor core 11L, and the smaller rotor core 11 may be referred to as rotor core 11S. In this embodiment, the rotor cores 11L and 11S have different numbers of laminated core pieces 12, which causes the rotor cores 11L and 11S to have different axial dimensions.

[0047] When manufacturing the rotor 10, first, the magnets 20 are accommodated in the slots 14 of the two rotor cores 11 supported by the two support jigs 60, respectively. Next, the cull plates 80 are placed on the first end faces 11a of the two rotor cores 11. At this time, the positioning pins 63 are inserted into the positioning holes 85.

[0048] Next, each support jig 60 is placed in a heating device (not shown), whereby each support jig 60, each rotor core 11, and each cull plate 80 are preheated to a predetermined temperature. In addition, the fixed mold 50 and the movable mold 70 are preheated to a predetermined temperature.

[0049] 3, next, two support jigs 60 are placed between the fixed mold 50 and the movable mold 70. More specifically, a conveying device (not shown) moves the support jigs 60 along the pair of guide rails 57 and places them between the pair of guide rails 57, and then places the support jigs 60 on the support members 54.

[0050] 5, the intermediate plate 72 then descends, causing the intermediate plate 72 to come into contact with the upper surface of the cull plate 80 corresponding to the rotor core 11L. At this time, a gap is created between the lower surface of the intermediate plate 72 and the upper surface of the cull plate 80 corresponding to the rotor core 11S.

[0051] Thereafter, the pellet-shaped resin material 30 is placed in the second through-hole 72a. The resin material 30 placed in the second through-hole 72a is melted by the heat of the preheating. As shown in FIG. 6 , the pressure plate 71 then descends, pressing the intermediate plate 72 downward. As the pressure plate 71 descends, the intermediate plate 72 first presses the cull plate 80 corresponding to the rotor core 11L. This compresses the biasing member 55 of the biasing portion 53 corresponding to the rotor core 11L. Next, the intermediate plate 72 presses the cull plate 80 corresponding to the rotor core 11S. This compresses the biasing member 55 of the biasing portion 53 corresponding to the rotor core 11S. The pressure plate 71 then presses the two cull plates 80 collectively toward the support base 51 via the intermediate plate 72. In this state, each support jig 60 is biased toward the movable mold 70 by the biasing portion 53, so that the upper surface of each cull plate 80 is pressed against the lower surface of the intermediate plate 72. As a result of the above, the fixed die 50 and the movable die 70 clamp the two rotor cores 11 together in the axial direction via the two cull plates 80 against the biasing forces of the two biasing portions 53, thereby clamping the two rotor cores 11 together in the axial direction.

[0052] In this embodiment, because the axial dimensions of the rotor cores 11L and 11S are different from each other, the compression amount of the biasing member 55 corresponding to the rotor core 11L and the compression amount of the biasing member 55 corresponding to the rotor core 11S are different from each other during mold clamping. More specifically, the compression amount of the biasing member 55 corresponding to the rotor core 11L is greater than the compression amount of the biasing member 55 corresponding to the rotor core 11S. Therefore, during mold clamping, the lower surface of the support jig 60 supporting the rotor core 11S is located higher than the lower surface of the support jig 60 supporting the rotor core 11L. Note that the lower surface of the support jig 60 supporting the rotor core 11L may be located higher than the upper surface of the support base 51.

[0053] As shown in FIG. 7, the plunger 74 is then lowered, pressurizing the molten resin material 30 inside the second through-hole 72a and the connecting passage 81. As a result, the resin material 30 fills the interior of the slot 14 through the connecting passage 81 of the cull plate 80. The resin material 30 filled inside the slot 14 is heated by the heat of the preheating and solidifies. As a result, the magnet 20 is fixed to the rotor core 11.

[0054] Thereafter, the fixed mold 50 and the movable mold 70 are opened, and the intermediate plate 72 is separated from each cull plate 80. Thereafter, each cull plate 80 is taken out of the manufacturing apparatus 40, and the rotor 10 is removed from each support jig 60.

[0055] In this manner, two rotors 10 are manufactured. <Operation of this embodiment> The fixed die 50 and the movable die 70 clamp the two rotor cores 11 together in the axial direction against the biasing forces of the two biasing portions 53. In this state, the magnets 20 are fixed to the rotor cores 11 by supplying the resin material 30 through the second through holes 72a into the slots 14 in which the magnets 20 are housed.

[0056] Here, when the fixed die 50 and the movable die 70 clamp the two rotor cores 11 together, if the axial dimensions of the two rotor cores 11 are different from each other, the following inconvenience may occur: That is, the rotor core 11S with the smaller axial dimension may not be clamped by the fixed die 50 and the movable die 70. In this case, due to the difference in dimensions of the two rotor cores 11, a gap may be created inside the manufacturing apparatus 40 during clamping, which may allow the resin material 30 to leak out.

[0057] In this regard, according to the above configuration, the two rotor cores 11 are each urged toward the movable mold 70 by the two urging portions 53. Therefore, the dimensional difference between the two rotor cores 11 is absorbed by the two urging portions 53, making it less likely that a gap through which the resin material 30 leaks will be generated inside the manufacturing apparatus 40 when the molds are clamped.

[0058] <Effects of this embodiment> (1-1) The fixed die 50 has a plurality of biasing portions 53 that respectively bias the plurality of rotor cores 11 toward the movable die 70. The movable die 70 has a plurality of second through holes 72a that supply the resin material 30 to the slots 14 of each of the plurality of rotor cores 11. The fixed die 50 and the movable die 70 clamp the plurality of rotor cores 11 together against the biasing forces of the plurality of biasing portions 53 and clamp the rotor cores 11 together.

[0059] According to the above configuration, two rotors 10 can be manufactured at once, thereby improving the productivity of the rotors 10. (1-2) The fixed die 50 and the movable die 70 clamp the two rotor cores 11 together via the two cull plates 80.

[0060] For example, if the second through hole 72a and the slot 14 are directly connected, there is a risk that a portion of the resin material 30 that has filled and solidified in the slot 14 will remain in the second through hole 72a. In this case, in order to continuously manufacture the rotors 10, it is necessary to remove the resin material 30 that remains in the second through hole 72a after manufacturing the rotor 10. For this reason, it will be difficult to manufacture the next rotor 10 until the resin material 30 is removed.

[0061] In this regard, with the above configuration, the second through holes 72a and the slots 14 are connected via the connecting passages 81 of the cull plate 80, so that a portion of the resin material 30 that has filled and solidified in the slots 14 remains in the connecting passages 81. Therefore, by pulling the cull plate 80 away from the rotor core 11 after the resin material 30 has solidified, the resin material 30 in the slots 14 and the resin material 30 in the connecting passages 81 can be separated. Therefore, by preparing a new cull plate 80, the production of the next rotor 10 can be started early. This improves the productivity of the rotor 10.

[0062] (1-3) The biasing forces of the two biasing portions 53 are the same. According to the above configuration, the two biasing sections 53 can have a common configuration, which prevents the configuration of the manufacturing apparatus 40 from becoming complicated.

[0063] (1-4) The manufacturing apparatus 40 includes two positioning units 56 . According to the above configuration, each rotor core 11 disposed between the fixed die 50 and the movable die 70 is positioned. Therefore, the resin material 30 can be suitably filled into the slots 14 of each rotor core 11.

[0064] [Second embodiment] Hereinafter, a second embodiment of the rotor manufacturing apparatus will be described with reference to FIGS. In the second embodiment, the same symbols are used for the same configurations as in the first embodiment, and for configurations corresponding to those in the first embodiment, duplicate explanations may be omitted by adding "1**", which is the symbol "**" in the first embodiment plus "100".

[0065] 8, the manufacturing apparatus 140 includes a fixed mold 150 and a movable mold 170 that are configured to be capable of clamping and opening. The fixed mold 150 is an example of a "second mold." The movable mold 170 is an example of a "first mold."

[0066] The fixed mold 150 includes a support base 151, two end blocks 52, two support jigs 60, and two positioning portions . The upper surface of the support base 151 supports two support jigs 60 .

[0067] The movable mold 170 includes a pressure plate 71 , an intermediate plate 172 , a plurality of plungers 74 , and two biasing portions 153 . The intermediate plate 172 has a plurality of second through holes 172a into which the plurality of plungers 74 are inserted, respectively.

[0068] Each of the urging portions 153 has a support member 154 and a urging member 155. The urging portions 153 are arranged on the opposite side of the rotor core 11 from the support jig 60. The support member 154 has a flat plate shape. The support member 154 supports the upper surface of the cull plate 80 when the mold is closed. The outer shape of the support member 154 is larger than the outer shape of the cull plate 80. The support member 154 has a plurality of third through holes 154a into which the plurality of plungers 74 are respectively inserted. The third through holes 154a penetrate the support member 154 in the plate thickness direction. The third through holes 154a are provided at positions opposite the second through holes 172a. The third through holes 154a are an example of a "supply path."

[0069] The biasing member 155 biases the support member 154 toward the fixed mold 150. The biasing member 155 is a compression coil spring. One end of the biasing member 155 is connected to the lower surface of the intermediate plate 172. The other end of the biasing member 155 opposite to the one end is connected to the support member 154.

[0070] (Manufacturing procedure for rotor 10) Next, the manufacturing procedure for the rotor 10 using the manufacturing apparatus 140 will be described, focusing on the differences from the first embodiment.

[0071] Hereinafter, of the two support members 154, the support member 154 positioned above rotor core 11L may be referred to as support member 154A, and the support member 154 positioned above rotor core 11S may be referred to as support member 154B.

[0072] 8, two rotor cores 11 supported by two support jigs 60 are arranged between a fixed die 150 and a movable die 170. More specifically, a conveying device (not shown) moves the support jigs 60 along the pair of guide rails 57 and arranges them between the pair of guide rails 57, and then places the support jigs 60 on a support stand 151.

[0073] 9, next, intermediate plate 172 descends, causing support member 154A to contact the upper surface of cull plate 80 corresponding to rotor core 11L. At this time, a gap is created between the lower surface of support member 154B and the upper surface of cull plate 80 corresponding to rotor core 11S.

[0074] Thereafter, the pellet-shaped resin material 30 is placed in the third through-hole 154a. The resin material 30 placed in the third through-hole 154a is melted by the heat of the preheating. As shown in FIG. 10 , the pressure plate 71 then descends, pressing the intermediate plate 172 downward. As the pressure plate 71 descends, the biasing member 155 biasing the support member 154A is compressed. As the pressure plate 71 descends, the support member 154B comes into contact with the upper surface of the cull plate 80 corresponding to the rotor core 11S, and then the biasing member 155 biasing the support member 154B is compressed. Then, the pressure plate 71 presses the two cull plates 80 collectively toward the support base 151 via the intermediate plate 72 and the two biasing portions 153. In this state, each support member 154 is biased toward the fixed mold 150 by the biasing member 155, and the lower surface of each support member 154 is pressed against the upper surface of the cull plate 80. As a result of the above, the fixed die 150 and the movable die 170 clamp the two rotor cores 11 together in the axial direction via the two cull plates 80 against the biasing forces of the two biasing portions 153, thereby clamping the two rotor cores 11 together.

[0075] 11, the plunger 74 is then lowered, pressurizing the molten resin material 30 inside the third through-hole 154a and the connecting passage 81. As a result, the resin material 30 fills the interior of the slot 14 through the connecting passage 81 of the cull plate 80. The resin material 30 filled inside the slot 14 is heated by the heat of the preheating and solidifies. As a result, the magnet 20 is fixed to the rotor core 11.

[0076] Thereafter, the fixed mold 150 and the movable mold 170 are opened, and the support members 154 are separated from the cull plates 80. Thereafter, the cull plates 80 are taken out of the manufacturing apparatus 140, and the rotors 10 are removed from the support jigs 60.

[0077] In this manner, two rotors 10 are manufactured. <Operation of this embodiment> The fixed die 150 and the movable die 170 clamp the two rotor cores 11 together in the axial direction against the biasing forces of the two biasing portions 153. In this state, the magnets 20 are fixed to the rotor cores 11 by supplying the resin material 30 through the third through-holes 154a into the slots 14 in which the magnets 20 are housed.

[0078] The two rotor cores 11 are each biased toward the fixed mold 150 by two biasing portions 153. Therefore, the dimensional difference between the two rotor cores 11 is absorbed by the two biasing portions 153, making it less likely that a gap will form inside the manufacturing apparatus 140 that allows the resin material 30 to leak out when the molds are closed.

[0079] <Effects of this embodiment> According to the manufacturing apparatus 140 of this embodiment, it is possible to achieve the same effects as the effects (1-1) to (1-4) of the first embodiment.

[0080] <Example of change> Each embodiment can be modified as follows: Each embodiment and the following modifications can be combined with each other to the extent that no technical contradiction occurs.

[0081] In the following, a modified example of the first embodiment will be described, but the same can be applied to the second embodiment as long as there is no technical contradiction. The resin material 30 may be a thermoplastic resin.

[0082] The fixed mold 50 does not have to include the positioning portion 56. The biasing forces of the multiple biasing portions 53 may be different from one another. In this case, it is preferable that the biasing force of each biasing portion 53 is equal to or greater than the biasing force required to apply a desired clamping force to the rotor core 11 during clamping.

[0083] The manufacturing apparatus 40 does not have to include the cull plate 80. In this case, the second through-holes 72a and the slots 14 may be directly connected. The movable mold 70 may be disposed below the fixed mold 50 .

[0084] The biasing member 55 may be configured by one support member 54 and one biasing member 55. The biasing member 55 may be a leaf spring, a hydraulic cylinder, an electric cylinder, or the like, instead of a compression coil spring.

[0085] The manufacturing apparatus 40 may manufacture three or more rotors 10. A supply path for supplying the resin material 30 to the slots 14 may be provided in the fixed mold 50. In this case, the cull plate 80 may be omitted, and the connection path 81 may be provided in the support jig 60. Also, instead of the support jig 60, the cull plate 80 may be disposed between the support base 51 and the rotor core 11.

[0086] <Additional Notes> Each of the above embodiments includes the configurations described in the following supplementary notes. [Appendix 1] An apparatus for manufacturing multiple rotors at once, the multiple rotors including a cylindrical rotor core having slots penetrating in the axial direction, magnets housed in the slots, and a resin material filled in the slots to secure the magnets to the rotor core, the rotor manufacturing apparatus including a first mold and a second mold that clamp the multiple rotor cores with the magnets housed in the slots in the axial direction and clamp them together, the first mold having a plurality of biasing portions that respectively bias the multiple rotor cores toward the second mold, one of the first mold and the second mold having a plurality of supply paths that supply the resin material to the slots of each of the multiple rotor cores, and the first mold and the second mold clamp the multiple rotor cores together against the biasing forces of the multiple biasing portions.

[0087] [Appendix 2] A rotor manufacturing apparatus as described in [Appendix 1], which has a connecting passage connecting the supply passage and the slot, and is provided with a plurality of cull plates arranged on one end face in the axial direction of each of the plurality of rotor cores, and the first mold and the second mold clamp the plurality of rotor cores together via the plurality of cull plates.

[0088] [Appendix 3] The rotor manufacturing device according to [Appendix 1] or [Appendix 2], wherein the biasing forces of the multiple biasing portions are the same. [Appendix 4] A method for manufacturing a rotor according to any one of [Appendix 1] to [Appendix 3], comprising a plurality of positioning portions for positioning each of the plurality of rotor cores arranged between the first die and the second die. [Explanation of symbols]

[0089] 10...Rotor 11, 11L, 11S...Rotor core 11a...first end surface 11b…Second end surface 12...Iron core piece 13...Center hole 13a...Key 14...Slot 20...Magnet 30...Resin material 40,140…Manufacturing equipment 50,150…Fixed type 51,151...Support stand 51a...accommodating recess 52...End block 53,153... Actuating unit 54, 154, 154A, 154B...Support members 55, 155... Urging member 56... Positioning part 57...Guide rail 60...Support jig 61...Base plate 61a...Through hole 62...Post 63...Locating pin 64...Spacer 64a…Center hole 70,170…Movable type 71...Pressure plate 71a...1st through hole 72,172...Intermediate plate 72a, 172a…Second through hole 73...Facing part 74...Plunger 80...Calplate 81...Connecting road 82...Runners 83...Communication hole 84...recess 85...Positioning hole 154a...Third through hole

Claims

1. An apparatus for collectively manufacturing a plurality of rotors, the apparatus comprising: a cylindrical rotor core having slots penetrating in an axial direction; magnets housed in the slots; and a resin material filled in the slots to fix the magnets to the rotor core, a first die and a second die that clamp the rotor cores, each having the magnet housed in the slot, in the axial direction, and clamp the rotor cores; the first die has a plurality of biasing portions that bias the plurality of rotor cores toward the second die, one of the first die and the second die has a plurality of supply paths that supply the resin material to the slots of the plurality of rotor cores, the first die and the second die clamp the plurality of rotor cores together against the biasing forces of the plurality of biasing portions; Rotor manufacturing equipment.

2. a plurality of cull plates each having a connecting passage connecting the supply passage and the slot, the cull plates being disposed on one end surface in the axial direction of each of the plurality of rotor cores; The first die and the second die clamp the plurality of rotor cores together via the plurality of cull plates. The rotor manufacturing apparatus according to claim 1 .

3. The biasing forces of the plurality of biasing portions are the same. The rotor manufacturing apparatus according to claim 1 .

4. a plurality of positioning portions that position each of the plurality of rotor cores arranged between the first die and the second die; The rotor manufacturing apparatus according to any one of claims 1 to 3.

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