Motor manufacturing method and motor manufacturing device

Abstract

Provided are a motor manufacturing method and a motor manufacturing device with which a reduction in equipment height in a motor core manufacturing process is achieved and a contribution to the improvement of productivity in the motor core manufacturing process is possible. This motor manufacturing method includes: at a first position, feeding a tablet into a lower mold in a state in which a plurality of cores arranged along an axial direction with an intermediate plate therebetween are above and separated from the lower mold; lowering the plurality of cores toward the lower mold; moving the lower mold and the plurality of cores to a second position facing an upper mold; and, at the second position, filling a resin filling part formed in each of the plurality of cores with a resin.

Description

Motor manufacturing method and motor manufacturing device

[0001] The present disclosure relates to a motor manufacturing method and a motor manufacturing apparatus.

[0002] A rotating electric machine is provided with a motor core (e.g., including a rotor core (rotor iron core) and a stator core (stator iron core). Hereinafter, the rotor core and stator core will be collectively referred to simply as the core). The core has a plurality of slots arranged in a circular ring at predetermined intervals, each of which has a permanent magnet attached to it. One known method for attaching the permanent magnet to the core is to insert the permanent magnet into the slot, then fill the surrounding area with resin and allow it to harden (see, for example, Japanese Patent No. 5681027).

[0003] In the technology described in Patent No. 5681027, when multiple cores are lined up along the axial direction and filled with resin, in order to load a tablet into the lower die of the molding machine after the multiple cores have been set, a gap must be formed between the stacked cores and the lower die, which increases the height of the equipment. On the other hand, if the tablet is loaded before the cores are placed in the molding machine, the tablet will heat up during the time until the multiple cores are placed, which will cause the resin that forms the tablet to harden, making it difficult to fill with resin.

[0004] In view of the above-mentioned problems, the present disclosure aims to provide a motor manufacturing method and a motor manufacturing apparatus that can reduce the equipment height in the motor core manufacturing process and contribute to improving productivity in the motor core manufacturing process.

[0005] In order to achieve the above object, a first aspect of the technology disclosed herein is a motor manufacturing method that includes: inserting a tablet into a lower mold at a first position with multiple cores arranged axially via an intermediate plate and spaced upward from the lower mold; lowering the multiple cores toward the lower mold; moving the lower mold and the multiple cores to a second position opposite the upper mold; and filling resin into the resin-filled portions formed in each of the multiple cores at the second position.

[0006] A second aspect of the technology disclosed herein is a motor manufacturing method according to the first aspect, in which multiple lower dies are provided on a support base, and a tablet can be inserted into one of the multiple lower dies located in a first position.

[0007] A third aspect of the technology of the present disclosure is a motor manufacturing method according to the first aspect, in which the lower mold is mounted on a support base, and the lower mold and the multiple cores are moved to a second position by rotating the support base.

[0008] A fourth aspect of the technology of the present disclosure is a motor manufacturing method according to the first aspect, in which the lower mold is mounted on a support base, and the support base slides to move the lower mold and the multiple cores to a second position.

[0009] A fifth aspect of the technology of the present disclosure is a motor manufacturing method according to the first aspect, in which a plurality of lower dies are provided on a support base, and a plurality of cores filled with resin are separated from one of the plurality of lower dies located in a third position.

[0010] A sixth aspect of the technology of the present disclosure is a motor manufacturing method according to the first aspect, in which a plurality of lower dies are provided on a support base, and a plurality of cores placed on a lower die located in a third position among the plurality of lower dies are heated to further harden the resin.

[0011] A seventh aspect of the technology of the present disclosure is a motor manufacturing method according to the first aspect, in which multiple lower dies are provided on a support base, and multiple cores before being filled with resin are placed above a lower die located in a fourth position among the multiple lower dies.

[0012] An eighth aspect of the technology of the present disclosure is a motor manufacturing method according to the first aspect, in which a plurality of lower dies are provided on a support base, and among the plurality of lower dies, a lower die in a fourth position and / or a plurality of cores before being filled with resin are preheated.

[0013] A ninth aspect of the technology of the present disclosure is a motor manufacturing apparatus that includes a support mechanism that supports, at a first position, multiple cores arranged along the axial direction via an intermediate plate so that the multiple cores can be raised and lowered freely to a position where a tablet can be inserted into a lower mold, a moving mechanism that moves the lower mold and multiple cores to a second position opposite the upper mold, and a resin filling mechanism that fills resin into resin filling portions formed in each of the multiple cores at the second position.

[0014] In view of the above-mentioned problems, the present disclosure provides a motor manufacturing method and a motor manufacturing apparatus that can reduce the height of motor core manufacturing equipment and contribute to improving productivity in the motor core manufacturing process.

[0015] FIG. 1 is a schematic explanatory diagram showing an example of a schematic configuration of a rotor core manufacturing apparatus according to an embodiment. FIG. 2 is a perspective view showing a schematic configuration of a rotor core and an intermediate plate according to an embodiment. FIG. 3 is a schematic explanatory diagram showing an example of a schematic configuration of a rotor core manufacturing apparatus according to an embodiment. FIG. 4 is a schematic explanatory diagram showing an example of a schematic configuration of a rotor core manufacturing apparatus according to an embodiment. FIG. 5 is a schematic explanatory diagram showing an example of a schematic configuration of a rotor core manufacturing apparatus according to an embodiment. FIG. 6 is a schematic explanatory diagram showing an example of a schematic configuration of a rotor core manufacturing apparatus according to an embodiment. FIG. 7 is a schematic explanatory diagram showing an example of a schematic configuration of a rotor core manufacturing apparatus according to an embodiment. FIG. 8 is a schematic explanatory diagram showing an example of a schematic configuration of a rotor core manufacturing apparatus according to an embodiment. FIG. 9 is a schematic explanatory diagram showing an example of a schematic configuration of a rotor core manufacturing apparatus according to an embodiment.

[0016] Hereinafter, each embodiment for carrying out the present disclosure will be described with reference to the drawings. Note that the scope necessary for the explanation to achieve the object of the present disclosure will be schematically shown below, and the scope necessary for explaining the relevant parts of the present disclosure will be mainly explained, and the parts for which explanation is omitted will be referred to as publicly known technologies. Furthermore, identical or corresponding components in the drawings will be given the same or similar reference numerals, and redundant explanations will be omitted. Furthermore, when a single drawing includes multiple identical or corresponding components, only some of them may be given reference numerals to make the drawing easier to understand.

[0017] <<First Embodiment>> <Outline of Rotor Core Manufacturing Apparatus> First, an outline of a rotor core manufacturing apparatus 10 according to this embodiment will be described with reference to Figures 1 and 2. Figure 1 is a schematic explanatory diagram showing an outline of the rotor core manufacturing apparatus 10 according to this embodiment. Figure 2 is a perspective view showing the general configuration of a rotor core 2 and an intermediate plate 22 according to this embodiment.

[0018] As shown in Fig. 1, rotor core manufacturing apparatus 10 is an apparatus that can fill resin into magnet insertion holes 4 of multiple rotor cores 2 (i.e., perform molding). Specifically, rotor core manufacturing apparatus 10 is an apparatus that fills resin into magnet insertion holes 4 formed in each of multiple rotor cores 2 that are lined up along the axial direction. Rotor core manufacturing apparatus 10 is an example of a "motor manufacturing apparatus" according to the technology of the present disclosure. Multiple rotor cores 2 are an example of a "multiple cores" according to the technology of the present disclosure.

[0019] The rotor core manufacturing apparatus 10 includes an upper die support portion 11 and a table portion 30. The upper die support portion 11 is a mechanism that supports an upper die 33. When the rotor core 2 is filled with resin, the upper die support portion 11 positions the upper die 33 at a position facing the rotor core 2.

[0020] The upper die support portion 11 includes a support column 12 extending in the vertical direction, and a horizontal portion 14 extending from the upper end of the support column 12 toward the table portion 30. The horizontal portion 14 is provided with a plurality of lifting rods 16 (three in this example), and an upper die 33 is positioned below the horizontal portion 14 by the lifting rods 16. The upper die 33 is movable in the vertical direction by the lifting rods 16. The upper die 33 is an example of an "upper die" according to the technology of the present disclosure.

[0021] The table unit 30 includes a rotary table 31 and a plurality of lower dies 32 provided on the rotary table 31. The rotary table 31 is a table-like member having a substantially rectangular parallelepiped shape in a plan view. The rotary table 31 is provided with a plurality of lower dies 32. In the example shown in FIG. 1 , two lower dies 32A and 32B are provided on the upper surface of the rotary table 31. A rotary shaft unit 36 ​​is provided in the center of the rotary table 31. The rotary shaft unit 36 ​​is rotatable by receiving power from a drive source (not shown). The rotary table 31 is rotatable in accordance with the rotation of the rotary shaft unit 36. The table unit 30 is an example of a "moving mechanism" according to the technology of the present disclosure. The rotary table 31 is an example of a "support base" according to the technology of the present disclosure.

[0022] Support plates 20A and 20B are provided above the lower dies 32A and 32B, respectively. A plurality of rotor cores 2 are placed on the lower dies 32A and 32B via the support plates 20A and 20B. Resin filling paths 23 are formed in the support plates 20A and 20B. In the following description, when it is not necessary to distinguish between the lower dies 32A and 32B, they will also be simply referred to as "lower dies 32." Furthermore, in the following description, when it is not necessary to distinguish between the support plates 20A and 20B, they will also be simply referred to as "support plates 20." The lower die 32 is an example of a "lower die" according to the technology of the present disclosure.

[0023] A support rod 21 is attached between the support plate 20B and the lower mold 32B. The support rod 21 is extendable and retractable. The extension and contraction of the support rod 21 allows the support plate 20B to be raised and lowered relative to the lower mold 32B. Specifically, the support rod 21 supports the support plate 20B, on which multiple rotor cores 2 are placed, so that it can be raised and lowered up to a position where tablets T can be inserted. The support plate 20B and the support rod 21 are an example of a "support mechanism" according to the technology of the present disclosure.

[0024] The number and shape of the support rods 21 are not particularly limited as long as they have the strength to lift and lower the multiple rotor cores 2 placed on the support plate 20. In addition, although the support plate 20B provided on the lower mold 32B is given as an example here, the lower mold 32A is also provided with a support plate 20A and support rods 21 of a similar configuration.

[0025] A plunger 34A is provided in the center of the lower mold 32A. The plunger 34A is housed in a through-hole that communicates between the lower mold 32A and the rotary table 31. Similarly, a plunger 34B is provided in the center of the lower mold 32B. The plunger 34B is housed in a through-hole that communicates between the lower mold 32B and the rotary table 31. In the following description, when there is no need to distinguish between the plungers 34A and 34B, they will also be simply referred to as "plungers 34." The plunger 34 is an example of a "resin filling mechanism" according to the technology of the present disclosure.

[0026] A tablet T (i.e., a resin material solidified into a predetermined shape) can be poured above the plungers 34A and 34B. In other words, the space within the through holes above the plungers 34A and 34B functions as a pot that is a resin reservoir. The rotor core manufacturing apparatus 10 operates under the control of the control device 15. The tablet T is an example of a "tablet" according to the technology of the present disclosure.

[0027] In this embodiment, the multiple rotor cores 2 are arranged side by side along the axial direction of the rotor core 2 (i.e., the central axis direction of the cylindrical rotor core 2). That is, the multiple rotor cores 2 are arranged in multiple stages.

[0028] Specifically, the plurality of rotor cores 2 are lined up in the axial direction with the intermediate plates 22 interposed therebetween. In other words, the plurality of rotor cores 2 are stacked in the axial direction with the intermediate plates 22 interposed therebetween. In this way, the rotor cores 2 and the intermediate plates 22 are stacked without any gaps before being set in the rotor core manufacturing apparatus 10. The stacking operation of the rotor cores 2 is achieved, for example, by using a robot arm to stack the rotor cores 2 placed on the intermediate plates 22. In this case, the rotor core 2 in the bottom row does not need to be placed on the intermediate plate 22. The intermediate plate 22 is an example of an "intermediate plate" according to the technology of the present disclosure.

[0029] Furthermore, when multiple rotor cores 2 are arranged side by side in the axial direction, the magnet insertion holes 4 of each of the multiple rotor cores 2 are communicated with each other via the through holes 22A of the intermediate plate 22. In other words, the through holes 22A are formed at positions corresponding to the magnet insertion holes 4 of the rotor cores 2 placed on the intermediate plate 22.

[0030] In the example shown in Fig. 1, four rotor cores 2 are arranged in the axial direction via intermediate plates 22. However, this is merely an example, and it goes without saying that two or three rotor cores 2 may be stacked, or five or more rotor cores 2 may be stacked.

[0031] Note that, although an example in which multiple rotor cores 2 have the same shape (here, the same core height (i.e., axial length)) has been described here, this is merely one example. Multiple rotor cores 2 may have different shapes (for example, core heights). Furthermore, in addition to differences in core height, differences may also exist in the arrangement and number of magnet insertion holes 4 and / or core diameter, etc.

[0032] Furthermore, multiple rotor cores 2 manufactured by rotor core manufacturing apparatus 10 according to this embodiment may be stacked and used in the same motor core, or may be used in separate motor cores. Note that the term "motor" in this specification also includes a semi-finished product in which some parts are attached to a motor core (rotor core or stator core).

[0033] As shown in FIG. 2 , the rotor core 2 is formed by laminating multiple thin electromagnetic steel sheets. The rotor core 2 has a cylindrical shape, and a through-hole 5 is provided in the center of the rotor core 2 (i.e., the region including the central axis of the cylindrical shape). When the rotor core 2 is assembled into a motor, a shaft constituting a rotating shaft is inserted into the through-hole 5. The rotor core 2 also has multiple (four in FIG. 2 ) magnet insertion holes 4 arranged circumferentially and extending along the axial direction of the rotor core 2, surrounding the through-hole 5. The magnet insertion holes 4 can be configured in a shape that allows insertion of permanent magnets 3, such as a rectangular parallelepiped or arc-shaped through-hole that penetrates the rotor core 2 in the thickness direction, but the specific shape is not particularly limited. Similarly, the number of magnet insertion holes 4 can be arbitrarily changed and can be more than the four shown in FIG. 2 , for example, approximately 10 to 40. The magnet insertion holes 4 are an example of a "resin-filled portion" according to the technology disclosed herein.

[0034] The permanent magnets 3 are inserted into and fixed in the magnet insertion holes 4 of the rotor core 2. The permanent magnets 3 can be formed, for example, as rectangular parallelepiped or arc-shaped blocks slightly smaller than the magnet insertion holes 4. The permanent magnets 3 may be magnetized or not when inserted into the magnet insertion holes 4. Furthermore, the permanent magnets 3 may be divided in the stacking direction or in a direction perpendicular to the stacking direction. When the permanent magnets 3 are inserted into the magnet insertion holes 4, at least partial gaps are formed between the outer circumferential surface of the permanent magnets 3 and the inner circumferential surface of the magnet insertion holes 4. The gaps formed in the magnet insertion holes 4 function as spaces to be filled with resin. These multiple spaces communicate with the through holes 22A provided in the intermediate plate 22.

[0035] In this embodiment, the magnet insertion holes 4 of the rotor core 2 are exemplified as rectangular parallelepiped holes that are open in the vertical direction and have substantially no gaps in the front-to-back or left-to-right directions. Therefore, the upper mold 33 and the lower mold 32 have substantially flat contact surfaces, but the shapes of the contact surfaces of the upper mold 33 and the lower mold 32 can be changed as appropriate to match the shape of the rotor core 2 to be held. For example, when the rotor core manufacturing apparatus 10 according to this embodiment is used for resin molding an inner rotor type stator core, it is preferable to use the upper mold 33 and the lower mold 32 that include protrusions that are inserted into spaces formed in the center of the stator core.

[0036] 2 , the intermediate plate 22 has a rectangular shape when viewed from above. The rotor core 2 is placed on the upper surface of the intermediate plate 22. The rotor core 2 is placed on the intermediate plate 22 with the central axis of the intermediate plate 22 and the central axis of the rotor core 2 substantially aligned. The intermediate plate 22 also has a shape that allows the rotor core 2 to be placed thereon (for example, a width that is larger than the outer diameter of the rotor core 2, and a plate thickness that provides sufficient rigidity to support the rotor core 2).

[0037] The intermediate plate 22 has through holes 22A formed therethrough in the plate thickness direction. The through holes 22A are formed at positions facing the magnet insertion holes 4 of the rotor core 2. In other words, when the rotor core 2 is placed on the intermediate plate 22, the through holes 22A communicate with the magnet insertion holes 4. The number and arrangement of the through holes 22A are determined according to the number and arrangement of the magnet insertion holes 4 in the rotor core 2.

[0038] The intermediate plate 22 also has a protruding portion 22B that protrudes from the surface (here, the upper surface) on which the rotor core 2 is placed. The protruding portion 22B has a cylindrical shape and is insertable into a through hole formed in the rotor core 2. The rotor core 2 is positioned relative to the intermediate plate 22 by inserting the protruding portion 22B into the through hole 5. Furthermore, the engagement between the protruding portion 22B and the through hole 5 prevents the rotor core 2 from falling off the placement surface of the intermediate plate 22. The protruding length of the protruding portion 22B (i.e., the height from the placement surface to the tip) is set appropriately depending on the positioning accuracy, etc.

[0039] Note that the cylindrical protrusion 22B is merely one example, and may be columnar. Furthermore, the protrusion 22B may be a pin-shaped member provided in plurality along the circumferential direction of the rotor core 2. In this case, the pin-shaped members serving as the protrusion 22B are inserted into holes formed in the rotor core 2 (for example, through holes provided in the rotor core 2 for weight reduction or through holes that serve as flow paths for cooling the core).

[0040] Next, the manner in which the rotor core 2 is molded will be described with reference to Figures 3 to 6. Figure 3 is a schematic explanatory diagram showing an example of how the rotor core 2 according to this embodiment is placed in a mold. Figure 4 is a schematic explanatory diagram showing an example of how the rotor core 2 according to this embodiment is molded. Figure 5 is a schematic explanatory diagram showing an example of how the rotor core 2 according to this embodiment is molded. Figure 6 is a schematic explanatory diagram showing an example of how the rotor core 2 according to this embodiment is moved from inside the mold.

[0041] As shown in FIG. 3 , multiple rotor cores 2 lined up along the axial direction are placed on the support plate 20. Here, multiple rotor cores 2 are placed on the support plate 20B. Then, tablets T are placed in the lower die 32B. The tablets T are placed into the lower die 32 from between the support plate 20 and the lower die 32. That is, the tablets T are placed into the lower die 32 with the multiple rotor cores 2 separated from the lower die 32. Thereafter, the support plate 20B is lowered, and the multiple rotor cores 2 are lowered toward the lower die 32B. Finally, the multiple rotor cores 2 are placed on the lower die 32 via the support plate 20B.

[0042] The rotor cores 2 placed on the support plate 20 may be preheated by a heating furnace (not shown). After being placed on the support plate 20, the rotor cores 2 may be preheated by heating equipment (not shown).

[0043] 4, the rotary table 31 is then rotated 180 degrees, and the lower die 32B and the plurality of rotor cores 2 placed thereon are moved to a position facing the upper die 33. In this manner, the plurality of rotor cores 2 lined up along the axial direction are placed inside the mold (i.e., between the upper die 33 and the lower die 32 (here, the lower die 32B)).

[0044] As the rotary table 31 rotates 180 degrees, the lower die 32A, which was originally located below the upper die 33, moves to the position where the lower die 32B was located. In other words, the positions of the lower die 32B and the lower die 32A are swapped. In this case, preparation for the resin filling operation may be performed in the lower die 32A. Specifically, a plurality of rotor cores 2 are placed on the support plate 20A. Then, tablets T are inserted into the lower die 32A. Thereafter, the support plate 20A is lowered, and the plurality of rotor cores 2 are placed on the lower die 32A via the support plate 20A.

[0045] The timing of the preparation work for the lower die 32A as described above is not particularly limited as long as it is completed before the next rotation of the rotary table 31. For example, it may be performed while the rotor core 2 placed on the lower die 32B (described later) is being filled with resin.

[0046] As shown in Figure 5, multiple rotor cores 2 are held by an upper mold 33 and a lower mold 32 in a state lined up in the axial direction via intermediate plates 22. The upper mold 33 abuts against the upper part of the topmost rotor core 2, more specifically, against its upper surface, to support it. The lower mold 32 abuts against the bottommost rotor core 2 via a support plate 20 to support it. The upper mold 33 can be raised and lowered by a lifting rod 16 powered by an actuator (not shown). The lifting and lowering operation of the upper mold 33 is mainly performed when holding the rotor core 2 within the mold or when moving the rotor core 2 from within the mold.

[0047] As described above, the upper die 33 may be movable in the vertical direction. The upper die 33 descends and presses the upper surface of the rotor core 2 with a predetermined pressing force, thereby holding multiple rotor cores 2 sandwiched between the upper die 33 and the lower die 32. The shapes, materials, etc. of the surfaces of the upper die 33 and the lower die 32 that face the rotor core 2 can be adjusted so that the filled resin does not leak out of the rotor core 2 when the resin is filled into the magnet insertion holes 4. Specifically, the contact surfaces can be adjusted so that they are sealed when the rotor core 2 is sandwiched between the upper die 33 and the lower die 32.

[0048] In this embodiment, as described above, a structure is adopted in which the upper mold 33 is directly moved up and down, but other structures can be adopted as long as they are structures that allow the relative vertical positions of the upper mold 33 and the lower mold 32 to be changed. Specifically, for example, instead of moving the upper mold 33 up and down, a structure may be adopted in which the lower mold 32 is moved up and down, or both the upper mold 33 and the lower mold 32 are moved up and down.

[0049] A resin filling path 23 is formed between the lower mold 32 and the support plate 20 to supply softened resin R to the multiple magnet insertion holes 4 of the rotor core 2. The path structure of the resin filling path 23 is set appropriately according to the number and shape of the magnet insertion holes 4 of the rotor core 2, the shape of the pots, etc.

[0050] Since the rotor core 2 in which resin is filled into the magnet insertion holes 4 can often be changed to another shape, it is a good idea to prepare multiple support plates 20 in advance that have resin filling paths 23 of different structures, and replace them as appropriate to match the rotor core 2 held in the upper mold 33 and lower mold 32.

[0051] The plunger 34 presses the resin R softened by heating the tablet T with a heater (not shown). In the example shown in Fig. 5, the resin R is pressed by a cylindrical plunger 34B provided in the center of the lower mold 32B. This causes the softened resin R to flow, and after passing through the resin filling path 23, the resin R is filled into the magnet insertion holes 4 of the rotor core 2.

[0052] The flowing resin R first enters the magnet insertion holes 4 of the bottom-most rotor core 2, then enters the magnet insertion holes 4 of the second and third rotor cores 2, and finally enters the magnet insertion holes 4 of the top-most rotor core 2. In this way, the resin R is filled into each of the magnet insertion holes 4 of the multiple rotor cores 2.

[0053] The resin R mainly contains a thermosetting resin material. Specifically, the resin R may contain a thermosetting resin material such as an epoxy resin, a phenol resin, an unsaturated polyester resin, or a cyanate resin. In addition to the thermosetting resin material, a curing agent, a filler, etc. may be added to the resin R.

[0054] As shown in Figure 6, after filling with resin R is complete, the turntable 31 rotates 180 degrees, causing the lower die 32B and the plurality of rotor cores 2 placed thereon to move from below the upper die 33. In this way, the plurality of rotor cores 2 lined up along the axial direction are removed from the die. The removed plurality of rotor cores 2 are cut off from the support plate 20 and removed from the rotor core manufacturing apparatus 10. The plurality of rotor cores 2 are then transported to the next process.

[0055] Meanwhile, the rotation of the rotary table 31 switches the positions of the lower mold 32B and the lower mold 32A, so that the plurality of rotor cores 2 placed on the lower mold 32A are placed in the mold. Then, the magnet insertion holes 4 of each of the plurality of rotor cores 2 are filled with resin R.

[0056] The positional relationship between the lower molds 32A and 32B in a series of molding steps will be described with reference to Fig. 7. Fig. 7 is a schematic plan view showing an example of the configuration of a rotor core manufacturing apparatus 10 according to this embodiment.

[0057] 7, first, a plurality of rotor cores 2 lined up in the axial direction with the intermediate plate 22 interposed therebetween are placed on the lower die 32 of the rotor core manufacturing apparatus 10. Here, the lower die 32A is placed at a position where molding is performed (i.e., the filling position E2), and the lower die 32B is placed at a position where preparatory work for molding is performed (i.e., the standby position E1). The plurality of rotor cores 2 are placed on the lower die 32B at the standby position E1.

[0058] At the standby position E1, the preparatory work described above can be performed. Specifically, a plurality of rotor cores 2 are placed on the support plate 20B. Then, tablets T are placed in the lower mold 32B. Thereafter, the support plate 20B is lowered, and the plurality of rotor cores 2 are placed on the lower mold 32B via the support plate 20B. The standby position E1 is an example of a "first position" according to the technology of the present disclosure.

[0059] After the preparatory work is completed, the rotary table 31 rotates 180 degrees, moving the lower mold 32B and the multiple rotor cores 2 from the standby position E1 to the filling position E2. At the filling position E2, the multiple rotor cores 2 placed on the lower mold 32B are filled with resin. Meanwhile, the lower mold 32A moves from the filling position E2 to the standby position E1. The preparatory work described above is performed with the lower mold 32A at the standby position E1. The filling position E2 is an example of a "second position" according to the technology of the present disclosure.

[0060] After the resin filling is completed, the rotary table 31 rotates again by 180 degrees, causing the lower die 32B to move from the filling position E2 to the standby position E1. The lower die 32B that has moved to the standby position E1 cuts out a plurality of rotor cores 2. Meanwhile, the lower die 32A moves from the standby position E1 to the filling position E2, and the rotor cores 2 placed on the lower die 32A are filled with resin.

[0061] After the lower mold 32B returns to the standby position E1, it is cleaned and then prepared for molding again. In this manner, molding and the preparation or cleaning for molding are carried out continuously while the lower molds 32A and 32B are interchanged.

[0062] <Rotor Manufacturing Method> Next, a rotor manufacturing method according to this embodiment will be described with reference to Fig. 8. Fig. 8 is a flowchart showing an example of a rotor manufacturing process according to this embodiment.

[0063] 8 , the rotor core 2 is first placed on the intermediate plate 22 (step S01). In this case, the protrusions 22B are inserted into the through holes 5 of the rotor core 2, thereby positioning the rotor core 2 with respect to the intermediate plate 22. Note that the rotor core 2 that is at the bottom of the stack does not necessarily have to be placed on the intermediate plate 22.

[0064] Next, permanent magnets 3 and rotor cores 2 to which the permanent magnets 3 are attached are prepared, and the permanent magnets 3 are inserted into the magnet insertion holes 4 of the rotor cores 2 (step S02). Then, the multiple rotor cores 2 are arranged side by side in the axial direction via intermediate plates 22 (step S03).

[0065] Next, the intermediate plate 22, the rotor core 2, and the permanent magnets 3 are preheated (step S04). These are preheated using a known heating means (not shown). The heating temperature can be, for example, about 100 to 180°C.

[0066] The rotor cores 2 arranged along the axial direction are placed on the support plate 20 (step S05). Tablets T are introduced into the lower die 32 from between the support plate 20 and the lower die 32 (step S06). A heater (not shown) is operated on the tablets T introduced into the lower die 32 to soften the resin R (step S07). Specifically, the viscosity of the resin forming the tablets T is reduced by heating in the pot, resulting in softened resin R (hereinafter referred to as "softened resin"). The heater used for this heating is preferably controlled so as not to generate partial temperature differences in the tablets T. The tablets T melt as a result of this heating, reducing their viscosity and transforming into softened resin R with high fluidity.

[0067] Next, the support plate 20 on which the plurality of rotor cores 2 are placed is lowered (step S08). As a result, the plurality of rotor cores 2 are placed on the lower die 32 via the support plate 20. Then, the rotary table 31 is rotated (step S09). As a result, the plurality of rotor cores 2 lined up in the axial direction via the intermediate plate 22 are placed in the die.

[0068] The rotor core 2 is held within the upper die 33 and the lower die 32 (i.e., the metal mold) by moving the upper die 33 downward (step S10). At this time, the upper die 33 is adjusted to press the upper surface of the rotor core 2 with a predetermined pressure, thereby bringing the upper die 33 and the upper surface of the rotor core 2, and the lower die 32 and the lower surface of the intermediate plate 22 into close contact with each other.

[0069] Once the tablets T have turned into softened resin R, the softened resin R is filled into the magnet insertion holes 4 via the plunger 34 (step S11). Specifically, the plunger 34 is moved upward to press the resin R, and the softened resin R is injected into the resin filling path 23. The softened resin R that has flowed through the resin filling path 23 is then filled into each of the magnet insertion holes 4 of the multiple rotor cores 2 that are lined up along the axial direction. Note that, to smoothly fill the magnet insertion holes 4 with the softened resin R in step S10, air holes (not shown) for venting air from within the magnet insertion holes 4 may be provided in appropriate locations on the upper mold 33 and the intermediate plate 22, for example.

[0070] A mold heater (not shown) is operated to harden the softened resin R in the magnet insertion holes 4 (step S12). For example, the mold heater may be operated before, during, and / or after the resin is filled, and the resin may be hardened while being filled. That is, steps S11 and S12 may be performed simultaneously. When hardening the softened resin R, it is advisable to heat it, for example, at 100 to 180°C for several minutes. As the softened resin R hardens through heating, the permanent magnets 3 are fixed in the magnet insertion holes 4 of the rotor core 2 by the resin mold. The heating time in step S12 may be adjusted as appropriate depending on the specific composition of the resin used in the tablet T.

[0071] Once the series of resin molding processes described above is complete, the upper mold 33 is raised and the rotary table 31 is rotated (step S13). As a result, the resin-molded rotor core 2 is carried out of the mold. The carried-out rotor core 2 is then removed to another device for, for example, shaft attachment (step S14). Then, once removal of the rotor core 2 is complete, the lower mold 32 is cleaned (step S15). Cleaning the lower mold 32 may include cleaning the support plate 20, the lower mold 32, the inside of the pot, etc., using a cleaning member such as a brush.

[0072] As described above, with the rotor core manufacturing apparatus 10 according to the first embodiment, multiple rotor cores 2 lined up axially at the standby position E1 can be separated from the lower mold 32, and tablets T can be inserted into the lower mold 32 in this state. This reduces the equipment height by the amount of the upper mold 33 and its support structure compared to when multiple rotor cores 2 are installed and tablets T are inserted below the upper mold 33. Furthermore, because the tablets T can be inserted into the lower mold 32 while the rotor cores 2 are stacked, resin filling can be completed in a relatively short time compared to when the tablets T are inserted and then the rotor cores 2 are installed. As a result, the resin is prevented from hardening too much before filling, making filling difficult.

[0073] For example, as shown in Figure 9, consider the case where multiple rotor cores 2 are placed in a line along the axial direction between the upper mold 33 and the lower mold 132. In this case, to place multiple rotor cores 2 on the support plate 120, the upper mold 33 must be raised by the amount required to raise the support plate 120 and the amount of clearance required to place the multiple rotor cores 2. Furthermore, when molding multiple rotor cores 2, a larger amount of resin is required for filling, and the height of the tablet T increases, so the amount of lift of the support plate 120 becomes even greater. As a result, the height of the rotor core manufacturing apparatus 100 increases.

[0074] Furthermore, if the tablets T are loaded into the lower mold 132 in advance, the support plate 120 can be lowered, reducing the equipment height. However, in this case, the time from loading to the start of filling is longer than when multiple rotor cores 2 are installed and then loaded. In particular, when multiple rotor cores 2 are installed in an axially aligned manner, the weight and height increase compared to when a single core is installed, requiring careful work and time for installation in the molding device. Therefore, if the resin hardens faster than expected due to the passage of time after loading, filling with resin becomes difficult. With this configuration, as described above, the equipment height can be reduced by the amount of the upper mold 33 and its support structure, and resin filling can be completed in a relatively short time after loading the tablets T.

[0075] Furthermore, according to the rotor core manufacturing apparatus 10 according to the first embodiment, the lower die 32 is provided on the rotary table 31. The tablets T can be loaded into the lower die 32 when it is in the standby position E1. This allows the tablets T to be loaded into the lower die 32 when it is not inside the die, improving work efficiency. In other words, because the loading of the tablets T, which is a preparatory step required for filling the resin, can be performed outside the die, the time the die is occupied can be reduced, contributing to improved work efficiency in the rotor core manufacturing process.

[0076] Furthermore, according to the rotor core manufacturing apparatus 10 according to the first embodiment, the lower die 32 is provided on the rotary table 31, and the plurality of rotor cores 2 placed on the lower die 32 move to the filling position E2 by rotation of the rotary table 31. A circular path can be adopted as the movement trajectory of the lower die 32 and the plurality of rotor cores 2, which improves the degree of freedom in the facility layout of the rotor core manufacturing apparatus 10.

[0077] In the first embodiment, an example in which the turntable 31 rotates 180 degrees has been described, but the technology of the present disclosure is not limited to this. The turntable 31 may also rotate 90 degrees. In this case, the turntable 31 is an L-shaped table in a plan view, and the rotation shaft 36 is provided at the bent portion of the L-shape.

[0078] Second Embodiment In the first embodiment, an example in which the rotary table 31 is used as the table unit 30 has been described, but the technology of the present disclosure is not limited to this. In the second embodiment, a slide table 40 is used instead of the rotary table 31.

[0079] As shown in Fig. 10 , the slide table 40 is a table-like member having a substantially rectangular parallelepiped shape in a plan view. The slide table 40 is a table that can slide along the longitudinal direction. The slide table 40 is supported, for example, by a guide rail mechanism and is movable along the guide rails by receiving power from a drive source (not shown). The slide table 40 is provided with a plurality of lower dies 32. In the example shown in Fig. 10 , the slide table 40 is provided with lower dies 32A and 32B.

[0080] First, a plurality of rotor cores 2 lined up in the axial direction with the intermediate plate 22 interposed therebetween are placed on the lower die 32 of the rotor core manufacturing apparatus 10. Here, the lower die 32A is placed at the standby position E1, and the lower die 32B is placed at the filling position E2. The plurality of rotor cores 2 are placed on the lower die 32A which is at the standby position E1.

[0081] After the preparatory work is performed at standby position E1, the slide table 40 slides (here, moves leftward as viewed from the front side of the page), moving the lower mold 32A and the plurality of rotor cores 2 from standby position E1 to filling position E2. At filling position E2, the plurality of rotor cores 2 placed on the lower mold 32A are filled with resin. Meanwhile, the lower mold 32B moves from filling position E2 to standby position E3. At the lower mold 32B at standby position E3, the preparatory work is performed.

[0082] After the resin filling is completed, the slide table 40 slides in the opposite direction from the previous movement (here, to the right as viewed from the front side of the page), thereby moving the lower mold 32A from the filling position E2 to the standby position E1. A plurality of rotor cores 2 are cut from the lower mold 32A that has moved to the standby position E1. Meanwhile, the lower mold 32B moves from the standby position E3 to the filling position E2, and the rotor cores 2 placed on the lower mold 32A are filled with resin.

[0083] The lower mold 32A in the standby position E1 is cleaned and then prepared for molding again. In this manner, molding and the preparation or cleaning for molding are performed continuously while the lower molds 32A and 32B change positions.

[0084] As described above, the rotor core manufacturing apparatus 10 according to the second embodiment provides the same effects as those of the first embodiment described above. Furthermore, according to the rotor core manufacturing apparatus 10 according to the second embodiment, the lower die 32 is provided on the slide table 40, and the plurality of rotor cores 2 placed on the lower die 32 are moved to the filling position E2 by the sliding movement of the slide table 40. This allows a linear path to be adopted as the movement trajectory of the lower die 32 and the plurality of rotor cores 2, thereby improving the degree of freedom in the facility layout of the rotor core manufacturing apparatus 10.

[0085] In the second embodiment, an example in which two lower dies 32A and 32B are provided on the slide table 40 has been described, but the technology of the present disclosure is not limited to this. For example, three or more lower dies 32 may be provided on the slide table 40.

[0086] <<Third Embodiment>> In the above-described first embodiment, an example configuration in which two lower dies 32A and 32B are provided in rotor core manufacturing apparatus 10 has been described, but the technology of the present disclosure is not limited to this. In this third embodiment, rotor core manufacturing apparatus 10 is provided with four lower dies 62A to 62D.

[0087] As shown in FIG. 11 , the rotor core manufacturing apparatus 10 according to this embodiment has a table unit 60. The table unit 60 includes a rotary table 61 and a plurality of lower dies 62 provided on the rotary table 61. The rotary table 61 is a table-shaped member that is circular in plan view. A plurality of lower dies 62 are provided on the upper surface of the rotary table 61. In the example shown in FIG. 1 , four lower dies 62A to 62D are provided. A rotary shaft unit 63 is provided in the center of the rotary table 61. The rotary shaft unit 63 is rotatable by receiving power from a drive source (not shown). The rotary table 61 is rotatable in accordance with the rotation of the rotary shaft unit 63. The rotary table 61 is an example of a "support base" according to the technology disclosed herein.

[0088] For ease of explanation, the following description will be given taking the lower die 62A and the plurality of rotor cores 2 placed on the lower die 62A as an example. Similar operations may be performed on the lower dies 62B to 62D and the plurality of rotor cores 2 placed thereon. In the following description, when there is no need to distinguish between the lower dies 62A to 62D, they will also be simply referred to as the "lower die 62." The lower die 62 is an example of a "lower die" according to the technology of the present disclosure.

[0089] When the lower mold 62A is located at the setup position S1, the multiple rotor cores 2 lined up in the axial direction are placed on the support plate 20A. That is, the multiple rotor cores 2 are arranged above the lower mold 62A. The setup position S1 is an example of a "fourth position" according to the technology of the present disclosure. Then, when the turntable 61 rotates 90 degrees with the multiple rotor cores 2 placed on the support plate 20A, the lower mold 62A moves from the setup position S1 to the loading position S2. The loading position S2 is an example of a "first position" according to the technology of the present disclosure.

[0090] As shown in Figure 12, when the lower mold 62A is located at the loading position S2, a tablet T is loaded into the lower mold 62A. The tablet T is loaded into the lower mold 62A from between the support plate 20A and the lower mold 62A. The support plate 20A then descends, and the multiple rotor cores 2 are placed on the lower mold 62A via the support plate 20A. Then, with the multiple rotor cores 2 loaded on the lower mold 62A, the turntable 61 rotates 90 degrees, and the lower mold 62A and the multiple rotor cores 2 move from the loading position S2 to the filling position S3. The filling position S3 is an example of a "second position" according to the technology disclosed herein.

[0091] 13 , when the lower die 62A is located at the filling position S3, the multiple rotor cores 2 are held by the upper die 65 and the lower die 62A in a state where they are lined up in the axial direction via the intermediate plate 22. The plunger 64A presses the resin R that has been softened by heating the tablets T with a heater (not shown). This causes the softened resin R to flow, and after passing through the resin filling path 23, the resin R is filled into the magnet insertion holes 4 of the rotor core 2.

[0092] When filling with the resin R is complete, the turntable 61 rotates 90 degrees, moving the lower mold 62A and the multiple rotor cores 2 from the filling position S3 to the separation position S4. In other words, the multiple rotor cores 2 lined up along the axial direction are carried out from the mold. The separation position S4 is an example of a "third position" according to the technology of the present disclosure.

[0093] 14, when the lower die 62A is located at the separation position S4, the plurality of rotor cores 2 are separated from the support plate 20A. That is, the plurality of rotor cores 2 are separated from the lower die 62A. The plurality of rotor cores 2 removed from the rotor core manufacturing apparatus 10 are transported to the next process.

[0094] As described above, according to the rotor core manufacturing apparatus 10 according to the third embodiment, the same effects as those of the first embodiment described above can be obtained.

[0095] Furthermore, according to the rotor core manufacturing apparatus 10 according to the third embodiment, a plurality of lower dies 62 are provided on the rotary table 61. A plurality of rotor cores 2 are separated from the lower dies 62 at the separation position S4. This allows the separation work of a plurality of rotor cores 2 to be performed on the lower dies 62 that are not inside the mold, improving work efficiency. In other words, because the separation work can be performed outside the mold, the time the mold is occupied can be reduced, contributing to improved work efficiency in the rotor core manufacturing process.

[0096] Furthermore, in the case of multiple rotor cores 2 lined up along the axial direction, if the multiple rotor cores 2 are to be separated within the mold, it is necessary to raise the upper mold 65 by the amount required for the separation work. In this configuration, the separation work is performed outside the mold, so there is no need to raise the upper mold 65, and the equipment height can be reduced.

[0097] Furthermore, according to the rotor core manufacturing apparatus 10 according to the third embodiment, a plurality of lower dies 62 are provided on the rotary table 61. A plurality of rotor cores 2 are then placed on the lower dies 62 at the setup position S1 via the support plate 20. This allows a plurality of rotor cores 2 to be placed on the lower dies 62 that are not inside the die, improving work efficiency. In other words, because the placement work can be performed outside the die, the time the die is occupied can be reduced, contributing to improved work efficiency in the rotor core manufacturing process.

[0098] In the third embodiment, an example is given in which the plurality of rotor cores 2 are separated from the lower mold 62 at the separation position S4, but the technology of the present disclosure is not limited to this. In this first modification, the plurality of rotor cores 2 placed on the lower mold 62 are heated at the separation position S4 to additionally harden the resin.

[0099] As shown in FIG. 15 , when the lower mold 62A is located at the separation position S4, additional heating is performed on the multiple rotor cores 2 placed on the support plate 20A. The additional heating is performed by heating equipment 66. The heating equipment 66 includes a main body 66A that surrounds the multiple rotor cores 2 and a resistance heater 66B provided therein. The heating equipment 66 is movable relative to the multiple rotor cores 2 and is retracted to a position where it does not interfere with the rotational movement of the multiple rotor cores 2 except when heating is being performed. In this modified example, the separation position S4 is an example of a "third position" according to the technology of the present disclosure.

[0100] The heating method is not particularly limited, and for example, the heating method of the heating equipment 66 may be a hot air circulating furnace method, or a heating method using a lamp heater, a high-frequency heater, a block heater, and / or an infrared heater, etc. Also, while the heating equipment 66 has been described here as an example in which heating is performed from the radial outside of the multiple rotor cores 2, this is merely one example. For example, heating may be performed by a mold heater (not shown) provided in the lower mold 62A. Heating may also be performed by a heater abutting the top surface of the uppermost rotor core 2 of the multiple rotor cores 2. Furthermore, the multiple rotor cores 2 may be heated while sandwiched between the lower mold 62A and the heater.

[0101] Heating by the heating equipment 66 promotes additional hardening of the resin R filled in the magnet insertion holes 4 of the multiple rotor cores 2. When additionally hardening the resin R, it is advisable to heat it at 100 to 180°C for several minutes to several hours. As the softened resin R hardens through this heating, the permanent magnets 3 are fixed in the magnet insertion holes 4 of the rotor cores 2 with a resin mold. The heating time can be adjusted as appropriate to suit the specific composition of the resin used in the tablets T.

[0102] The additional curing of the resin R improves the heat resistance and elastic modulus of the cured resin R, which is expected to improve the performance of the rotating electric machine when the rotor core 2 is used as a motor. After the additional curing of the multiple rotor cores 2 is performed at the separation position S4, the multiple rotor cores 2 are separated from the lower mold 62A.

[0103] As described above, in this first modified example, multiple lower dies 62 are provided on the rotary table 61. Then, at the separation position S4, heating is performed on the multiple rotor cores 2 for additional hardening. This allows additional hardening of the multiple rotor cores 2 to be performed on the lower dies 62 that are not inside the mold, improving work efficiency. In other words, because additional hardening can be performed outside the mold, the time the mold is occupied can be reduced, contributing to improved work efficiency in the rotor core manufacturing process.

[0104] Here, an example has been described in which heating for additional hardening is performed at the separation position S4, and after heating, the multiple rotor cores 2 are separated from the lower mold 62A, but the technology of the present disclosure is not limited to this. For example, heating for additional hardening may be performed at an additional hardening position located between the separation position S4 and the filling position S3. In this case, the additional hardening position functions as the "third position" according to the technology of the present disclosure. Furthermore, heating for additional hardening may also be performed while the turntable 61 is rotating.

[0105] Furthermore, although an example in which additional curing is achieved by heating using the heating equipment 66 has been described here, the technology of the present disclosure is not limited to this. For example, a configuration may be adopted in which multiple rotor cores 2 are left together without using the heating equipment 66, thereby promoting the curing of the resin by accumulating heat in the rotor cores 2. In this case, the time for which the multiple rotor cores 2 are left is, for example, about several minutes to several hours.

[0106] In the third embodiment, a plurality of rotor cores 2 are arranged on the lower mold 62 at the setup position S1. However, the technology of the present disclosure is not limited to this. In this first modification, the plurality of rotor cores 2 are preheated at the setup position S1.

[0107] As shown in FIG. 16 , when the lower mold 62A is located at the setup position S1, preheating is performed on the multiple rotor cores 2 placed on the support plate 20A. Preheating is performed by heating equipment 68. The heating equipment 68 includes a main body 68A that surrounds the multiple rotor cores 2 and a resistance heater 68B provided therein. The heating equipment 68 is movable relative to the multiple rotor cores 2 and is retracted to a position where it does not interfere with the rotational movement of the multiple rotor cores 2 except when heating is being performed. In this modified example, the setup position S1 is an example of a "fourth position" according to the technology of the present disclosure.

[0108] The heating method is not particularly limited, and for example, the heating method of the heating equipment 68 may be a hot air circulating furnace method, or a heating method using a lamp heater, a high-frequency heater, a block heater, and / or an infrared heater, etc. Also, while the heating equipment 68 has been described here as an example in which heating is performed from the radial outside of the multiple rotor cores 2, this is merely one example. For example, heating may be performed by a mold heater (not shown) provided in the lower mold 62A. Heating may also be performed by a heater abutting the top surface of the uppermost rotor core 2 of the multiple rotor cores 2. Furthermore, the multiple rotor cores 2 may be heated while sandwiched between the lower mold 62A and the heater.

[0109] When filling the magnet insertion holes 4 with resin, if the rotor cores 2 are at a low temperature, the resin cools and its fluidity decreases. As a result, the resin may not be sufficiently filled inside the magnet insertion holes 4. By preheating the rotor cores 2, the fluidity of the resin is ensured, making it easier to fill the resin.

[0110] After the plurality of rotor cores 2 are preheated at the setup position S1, the lower die 62A and the plurality of rotor cores 2 move to the loading position S2.

[0111] As described above, in this second modified example, multiple lower dies 62 are provided on the rotary table 61. Then, multiple rotor cores 2 are preheated at the setup position S1. This allows multiple rotor cores 2 to be preheated for the lower dies 62 that are not inside the die, improving work efficiency. In other words, because preheating can be performed outside the die, the time the die is occupied can be reduced, contributing to improved work efficiency in the rotor core manufacturing process.

[0112] Here, an example has been described in which preheating is performed after multiple rotor cores 2 are placed on the support plate 20A at the setup position S1, but the technology of the present disclosure is not limited to this. For example, preheating may be performed at a preheating position provided between the setup position S1 and the loading position S2. In this case, the preheating position functions as the "fourth position" according to the technology of the present disclosure. Preheating may also be performed while the turntable 61 is rotating.

[0113] Furthermore, in the second modified example, an example in which multiple rotor cores 2 are preheated has been described, but the technology of the present disclosure is not limited to this. The lower mold 62 may be preheated instead of or in addition to preheating the multiple rotor cores 2. In this case, the lower mold 62 may be preheated by a mold heater (not shown).

[0114] It is needless to say that the first modified example and the second modified example described above may be combined. That is, additional curing of the resin may be performed at the separation position S4, and preheating of the rotor core 2 may be performed at the setup position S1.

[0115] Furthermore, in the third embodiment, additional hardening of the resin and separation of the plurality of rotor cores 2 from the lower mold 62 may be performed at the filling position S3. However, as described above, from the viewpoint of reducing the time the mold is occupied, it is desirable to perform additional hardening of the resin and separation of the plurality of rotor cores 2 from the lower mold 62 at the separation position S4.

[0116] In the third embodiment, the installation of a plurality of rotor cores 2, the preheating of the plurality of rotor cores 2, and the introduction of tablets T may be performed at the setup position S1.

[0117] Furthermore, in the third embodiment, an example in which four lower dies 62 are provided on the rotary table 61 has been described, but the technology of the present disclosure is not limited to this. For example, three lower dies 62 may be provided, or five or more lower dies 62 may be provided. Furthermore, the shape of the rotary table 61 does not have to be circular, and may be, for example, polygonal.

[0118] (Other Modifications) In addition, in the above-described embodiments, an example in which the resin is filled by the plunger 34 or 64 provided in the center of the lower mold 32 or 62 has been described, but the technology of the present disclosure is not limited to this. For example, the resin may be filled by an annular plunger that presses an annular resin tablet. Also, a multi-plunger including multiple plungers may press a tablet arranged in a position facing the magnet insertion hole 4 along the circumferential direction of the lower mold 32 or 62.

[0119] In addition, in the above-described embodiments, the intermediate plate 22 has a rectangular shape when viewed from above, but the technology of the present disclosure is not limited to this. The intermediate plate 22 may have another polygonal shape or a circular shape.

[0120] The above-described description and illustrations are a detailed explanation of the parts related to the technology of the present disclosure and are merely an example of the technology of the present disclosure. For example, the above description of the configuration, functions, actions, and effects is an explanation of an example of the configuration, functions, actions, and effects of the parts related to the technology of the present disclosure. Therefore, it goes without saying that unnecessary parts may be deleted, new elements may be added, or replacements may be made to the above-described description and illustrations within the scope of the gist of the technology of the present disclosure. Furthermore, to avoid confusion and facilitate understanding of the parts related to the technology of the present disclosure, the above-described description and illustrations omit explanations of common technical knowledge that do not require particular explanation to enable the implementation of the technology of the present disclosure.

[0121] In this specification, "A and / or B" is synonymous with "at least one of A and B." In other words, "A and / or B" means that it may be only A, only B, or a combination of A and B. Furthermore, in this specification, the same concept as "A and / or B" is also applied when three or more things are expressed by connecting them with "and / or."

[0122] All publications, patent applications, and technical standards mentioned in this specification are herein incorporated by reference to the same extent as if each individual publication, patent application, or technical standard was specifically and individually indicated to be incorporated by reference.

[0123] The following supplementary notes are further disclosed regarding the above embodiment. <Supplementary Note 1> A motor manufacturing method comprising: loading a tablet into a lower die at a first position with a plurality of cores arranged axially via an intermediate plate and spaced above the lower die; lowering the plurality of cores toward the lower die; moving the lower die and the plurality of cores to a second position facing the upper die; and filling, at the second position, resin into the resin-filled portions formed in each of the plurality of cores. <Supplementary Note 2> The motor manufacturing method according to Supplementary Note 1, wherein a plurality of the lower dies are provided on a support base, and the tablet can be loaded into one of the plurality of lower dies that is located at the first position. <Supplementary Note 3> The motor manufacturing method according to Supplementary Note 1 or Supplementary Note 2, wherein the lower die is provided on a support base, and the lower die and the plurality of cores are moved to the second position by rotating the support base. <Supplementary Note 4> The motor manufacturing method according to Supplementary Note 1 or Supplementary Note 2, wherein the lower mold is provided on a support base, and the lower mold and the plurality of cores are moved to the second position by sliding the support base. <Supplementary Note 5> The motor manufacturing method according to any one of Supplementary Note 1 to Supplementary Note 4, wherein a plurality of the lower molds are provided on the support base, and the plurality of cores filled with the resin are separated from one of the plurality of lower molds that is located at a third position. <Supplementary Note 6> The motor manufacturing method according to any one of Supplementary Note 1 to Supplementary Note 5, wherein a plurality of the lower molds are provided on the support base, and the plurality of cores placed on one of the plurality of lower molds that is located at a third position are heated to additionally harden the resin. <Supplementary Note 7> The motor manufacturing method according to any one of Supplementary Note 1 to Supplementary Note 6, wherein a plurality of the lower molds are provided on the support base, and the plurality of cores before being filled with the resin are placed above one of the plurality of lower molds that is located at a fourth position. <Supplementary Note 8> The motor manufacturing method according to any one of Supplementary Note 1 to Supplementary Note 7, wherein a plurality of the lower dies are provided on a support base, and among the plurality of lower dies, the lower die located at a fourth position and / or the plurality of cores before being filled with the resin are preheated.

[0124] The disclosure of Japanese Patent Application No. 2024-057132, filed on March 29, 2024, is incorporated herein by reference in its entirety. All documents, patent applications, and technical standards described herein are incorporated herein by reference to the same extent as if each individual document, patent application, and technical standard was specifically and individually indicated to be incorporated by reference.

Claims

1. At a first position, a tablet is placed into the lower die in a state where the cores arranged along the axial direction are spaced apart upward from the lower die; lowering the plurality of cores toward the lower die; moving the lower mold and the plurality of cores to a second position facing the upper mold; and and filling the resin-filled portions formed in each of the plurality of cores with resin at the second position. Motor manufacturing method.

2. The lower mold is provided in plurality. The motor manufacturing method according to claim 1 .

3. The lower mold has a resin filling mechanism that fills the resin filling portion with resin. The motor manufacturing method according to claim 1 .

4. A plurality of the lower dies are provided on the support base, The tablet can be inserted into the lower die at the first position among the plurality of lower dies. The motor manufacturing method according to claim 1 .

5. The lower mold is provided on a support base, The support base is rotated, and thereby the lower mold and the plurality of cores are moved to the second position. The motor manufacturing method according to claim 1 .

6. The lower mold is provided on a support base, The support base slides, thereby moving the lower die and the cores to the second position. The motor manufacturing method according to claim 1 .

7. A plurality of the lower dies are provided on the support base, The cores filled with the resin are separated from the lower mold at a third position among the lower molds. The motor manufacturing method according to claim 1 .

8. A plurality of the lower dies are provided on the support base, Among the plurality of lower molds, the plurality of cores placed on the lower mold at a third position are heated for additional curing of the resin. The motor manufacturing method according to claim 1 .

9. A plurality of the lower dies are provided on the support base, Among the plurality of lower dies, the plurality of cores before being filled with the resin are disposed above the lower die at the fourth position. The motor manufacturing method according to claim 1 .

10. A plurality of the lower dies are provided on the support base, Among the plurality of lower dies, the lower die at a fourth position and / or the plurality of cores before being filled with the resin are preheated. The motor manufacturing method according to claim 1 .

11. a support mechanism that supports the cores aligned along the axial direction at a first position so as to be able to freely move up and down to a position where the tablet can be inserted into the lower die; a moving mechanism that moves the lower mold and the plurality of cores to a second position facing the upper mold; a resin filling mechanism that fills resin into the resin filling portions formed in each of the plurality of cores at the second position. Motor manufacturing equipment.