Resin molding device, manufacturing device for motor core, resin molding method, and manufacturing method for motor core

Abstract

The resin former of the present disclosure comprises: an extrusion conveyance path capable of conveying, in a conveyance direction, a powdery resin composition containing a thermosetting resin supplied to an upstream side in the conveyance direction; a screw which is provided with a screw main body and fins, the screw main body extends in the conveying direction so as to be spaced apart from the inner wall surface of the extrusion conveying path by a predetermined distance in the extrusion conveying path, and the fins are formed on the outer peripheral surface of the screw main body; a former-side heater capable of heating the powdered resin composition conveyed in the extrusion conveyance path; a rotating device that rotates the screw so as to knead the powdered resin composition and convey the kneaded resin composition in a conveying direction, thereby generating a kneaded resin body; and a jig for receiving an annular resin material comprising the resin kneaded body output from an output port provided on the downstream side of the extrusion conveyance path in the conveyance direction.

Description

Technical Field

[0001] The present disclosure relates to a resin former, a manufacturing apparatus for a motor core, a resin molding method, and a manufacturing method for a motor core. Background Art

[0002] In a rotating electrical machine, there is a rotating electrical machine in which permanent magnets are respectively assembled in a plurality of slots that are arranged in a circular ring shape at a predetermined interval in a motor core such as a rotor core. As a method for assembling a permanent magnet in a motor core, a method is known in which after inserting a permanent magnet into a slot, resin is filled around the permanent magnet and cured.

[0003] Japanese Unexamined Patent Application Publication No. 2019-134566 describes the following: When filling resin as a filler into a magnet insertion hole of a rotor core, a flat resin is put into a filler supply unit (sometimes also referred to as a "pot") and heated to soften and melt it before filling. Summary of the Invention

[0004] Problems to be Solved by the Invention

[0005] As in the case of a motor core used in a motor mounted on a vehicle, etc., when the motor core itself is large, as the size of the slots increases, the number of slots increases, and the lamination height increases, etc., the filling amount of the resin also increases. When the filling amount of the resin into the motor core increases, it is necessary to proportionally increase the resin piece put into the pot. The heating unit for heating the resin piece is generally arranged around the pot, but if the resin piece is flat (in other words, a solid cylindrical shape) as in Japanese Unexamined Patent Application Publication No. 2019-134566, since the resin piece becomes large, there will be a large difference in the distance from the heating unit. As a result, it is particularly easy to generate a temperature difference between the surface portion and the central portion of the resin piece, and it is difficult to uniformly heat the entire resin piece. The non-uniform heating of the resin piece causes a deviation in the curing reaction of the resin material.

[0006] In view of the above problems, the present disclosure provides a resin former and a resin molding method capable of uniformly heating a resin piece, and a manufacturing apparatus for a motor core and a manufacturing method for a motor core using them.

[0007] Solutions to the Problems

[0008] The resin former of the first aspect of the present disclosure includes: an extrusion conveying path that can convey a powdery resin composition containing a thermosetting resin supplied to the upstream side in the conveying direction along the conveying direction; a screw having a screw body and fins, wherein the screw body extends along the conveying direction at a predetermined interval from the inner wall surface of the extrusion conveying path, and the fins are formed on the outer peripheral surface of the screw body; a former-side heater that can heat the powdery resin composition conveyed in the extrusion conveying path; a rotating device that rotates the screw to knead and convey the powdery resin composition along the conveying direction to generate a resin kneaded body; and a jig that receives an annular resin piece formed of the resin kneaded body output from an output port provided on the downstream side in the conveying direction of the extrusion conveying path.

[0009] In the resin former as described above, an annular resin piece that can be uniformly heated can be formed. Furthermore, since the resin piece is annular, it can be heated to a predetermined temperature in a shorter time compared to the case of using a flat resin piece.

[0010] Regarding the resin former of the second aspect of the present disclosure, in the resin former of the first aspect of the present disclosure as described above, it further includes: a cutting device that can cut the resin kneaded body output from the output port of the extrusion conveying path.

[0011] In the resin former as described above, the resin kneaded body can be cut and separated at an arbitrary position, and the amount of the annular resin piece can be freely adjusted.

[0012] Regarding the resin former of the third aspect of the present disclosure, in the resin former of the first or second aspect of the present disclosure as described above, the jig includes an annular hole portion that can be connected to the output port.

[0013] In the resin former as described above, the resin kneaded body output from the output port can be reliably received in the jig while maintaining an annular shape.

[0014] Regarding the resin former of the fourth aspect of the present disclosure, in the resin former of the third aspect of the present disclosure as described above, it further includes: a lid that can close the end portion on the downstream side in the conveying direction of the annular hole portion.

[0015] In the resin former as described above, when supplying the resin kneaded body into the jig, it can prevent the supplied resin kneaded body from leaking to the outside of the jig. In addition, by pressing the resin kneaded body supplied into the jig against the lid and continuing to supply, the resin kneaded body can also be pressurized and compressed.

[0016] Regarding the resin former of the fifth aspect of the present disclosure, in the resin former of the third or fourth aspect of the present disclosure described above, it further includes: a pressure device capable of pressurizing a ring-shaped resin member accommodated in the ring-shaped hole portion from one end side of the ring-shaped hole portion.

[0017] In the resin former as described above, by compressing the ring-shaped resin member in the compression jig, the density of the ring-shaped resin member can be increased. Thereby, the shape retention of the ring-shaped resin member can be improved, and the voids in the resin member can be reduced.

[0018] Regarding the resin former of the sixth aspect of the present disclosure, in the resin former of any one of the third to fifth aspects of the present disclosure described above, on at least one of the inner wall surface and the outer wall surface of the inner side of the ring-shaped hole portion, a plurality of ridges extending along the conveying direction and bulging in a direction crossing the conveying direction are formed.

[0019] In the resin former as described above, the forming of a resin member in which a large amount of resin material is arranged near the portion to be filled can be achieved by the ridges.

[0020] Regarding the resin former of the seventh aspect of the present disclosure, in the resin former of any one of the first to sixth aspects of the present disclosure described above, it further includes a diameter-changing jig, and the diameter-changing jig includes: a circular ring-shaped first opening portion capable of communicating with the output port of the extrusion conveying path; a circular ring-shaped second opening portion, at least one of the outer diameter and the inner diameter of which is different from that of the first opening portion; and a communication path connecting the first opening portion and the second opening portion.

[0021] In the resin former as described above, the outer diameter and the inner diameter of the resin kneaded body can be adjusted, and the size of the formed ring-shaped resin member can be changed without being restricted by the inner diameter of the extrusion conveying path and the like.

[0022] Regarding the resin former of the eighth aspect of the present disclosure, in the resin former of any one of the first, second, and seventh aspects of the present disclosure described above, the top end portion of the screw main body is constituted by a closing block without the fins, and the resin former further includes a moving device for moving the screw main body along the conveying direction.

[0023] In the resin former as described above, most of the forming of the ring-shaped resin can be completed by the top portion of the screw, and the degree of freedom in the shape of the jig is increased.

[0024] The manufacturing apparatus for a motor core according to the ninth aspect of the present disclosure includes: a resin former that can form an annular resin member; a mold that can hold a motor core including a plurality of resin filling portions arranged in a ring shape with a predetermined interval therebetween; an annular chamber that communicates with a resin filling path formed in the mold and whose ends can communicate with the plurality of resin filling portions respectively, and can accommodate the annular resin member therein; a plunger that can move in the annular chamber; and a manufacturing apparatus side heater disposed outside the mold and around the annular chamber. The resin former includes: an extrusion conveyance path that can convey a powdery resin composition containing a thermosetting resin supplied to the upstream side in the conveyance direction along the conveyance direction; a screw having a screw main body and fins, wherein the screw main body extends along the conveyance direction in the extrusion conveyance path with a predetermined interval from the inner wall surface of the extrusion conveyance path, and the fins are formed on the outer peripheral surface of the screw main body; a former side heater that can heat the powdery resin composition conveyed in the extrusion conveyance path; a rotation device that rotates the screw to knead and convey the powdery resin composition along the conveyance direction to generate a resin kneaded body; and a jig that receives an annular resin member formed of the resin kneaded body output from an output port provided on the downstream side in the conveyance direction of the extrusion conveyance path.

[0025] In the manufacturing apparatus for a motor core as described above, after forming a powdery resin composition as a material into a ring shape, the annular resin member is heated in the chamber. Thus, there is no resin in the central portion which is a position far from the manufacturing apparatus side heater, and the resin in the chamber can be heated evenly. In addition, since the resin is filled from the annular chamber into the resin filling portions arranged in a ring shape, the resin filling path connecting the resin filling portion and the chamber can be shortened. Moreover, by adjusting the diameter of the annular resin member, it is also possible to cope with changes in the types of motor cores in which resin is filled while maintaining the state of shortening the resin filling path (for example, enlargement / miniatization, change in the resin filling position with the same diameter of the core itself, etc.). Furthermore, by using a resin former to form an annular resin member, preheating can also be performed evenly. In addition, since uniform heating of the resin in the chamber can be achieved, high-frequency preheating before molding is not required or can be shortened. Furthermore, since the resin member is annular, it can be heated to a predetermined temperature in a short time compared with the case of using a flat resin member.

[0026] Regarding the manufacturing apparatus for a motor core according to the tenth aspect of the present disclosure, in the manufacturing apparatus for a motor core according to the ninth aspect of the present disclosure described above, the annular chamber can accommodate the annular resin member and the jig that supports the annular resin member.

[0027] In the manufacturing apparatus for the motor core as described above, there is no need to extrude the formed ring-shaped resin member from the jig, which can simplify the manufacturing process.

[0028] Regarding the manufacturing apparatus for the motor core according to the eleventh aspect of the present disclosure, in the manufacturing apparatus for the motor core according to the ninth aspect of the present disclosure as described above, the jig includes a ring-shaped hole portion that can be connected to the output port, the ring-shaped chamber can accommodate the ring-shaped resin member, the jig that accommodates the ring-shaped resin member in the ring-shaped hole portion, and at least a part of an extrusion ring whose tip portion is inserted from one end side of the ring-shaped hole portion of the jig, and the extrusion ring functions as a part of the plunger.

[0029] In the manufacturing apparatus for the motor core as described above, there is no need to extrude the formed ring-shaped resin member from the jig, which can simplify the manufacturing process. In addition, since the softened resin is moved to the resin filling portion by using the extrusion ring, there is no need to change the shape of the plunger to match the shape of the resin.

[0030] Regarding the manufacturing apparatus for the motor core according to the twelfth aspect of the present disclosure, in the manufacturing apparatus for the motor core according to any one of the ninth to eleventh aspects of the present disclosure as described above, on at least one of the inner wall surface and the outer wall surface of the ring-shaped chamber, a plurality of ridges extending along the conveying direction and bulging in a direction crossing the conveying direction are formed at a position where the resin filling portion is not provided for the motor core disposed in the mold.

[0031] In the manufacturing apparatus for the motor core as described above, the molding of a resin member in which a large amount of resin material is disposed near a portion to be filled can be achieved by the ridges. In addition, if the ridges are disposed in consideration of the arrangement of the resin filling portion and the resin filling path of the motor core, the amount of resin cured in the chamber can be reduced, and more resin material can be filled into the groove portion.

[0032] The resin molding method according to the thirteenth aspect of the present disclosure includes the following steps: starting the supply of a powdery resin composition containing a thermosetting resin into the extrusion conveyance path from the upstream side in the conveyance direction; rotating a screw extending in the extrusion conveyance path along the conveyance direction to knead and convey the powdery resin composition; heating the inside of the extrusion conveyance path to melt at least a part of the powdery resin composition conveyed in the extrusion conveyance path to generate a resin kneaded body; connecting one end of the annular hole portion of a jig having an annular hole portion to an outlet provided on the downstream side in the conveyance direction of the extrusion conveyance path; supplying the resin kneaded body from the outlet into the annular hole portion; and when a predetermined amount of the resin kneaded body is supplied into the annular hole portion, cutting the resin kneaded body between the outlet of the extrusion conveyance path and the annular hole portion to mold an annular resin part.

[0033] In the resin molding method as described above, an annular resin part that can be uniformly heated can be molded. In addition, during the molding of the annular resin part, the annular resin part can also be preheated uniformly. Moreover, since uniform heating of the resin in the chamber can be achieved, high-frequency preheating before molding is not required or can be shortened.

[0034] Regarding the resin molding method according to the fourteenth aspect of the present disclosure, in the resin molding method according to the thirteenth aspect of the present disclosure described above, the following step is further included: pressing and compressing the annular resin part in the annular hole portion in the direction along the conveyance direction.

[0035] In the resin molding method as described above, by compressing the annular resin part in the jig, the density of the annular resin part can be increased, thereby improving the shape retention of the annular resin part and reducing voids in the resin part.

[0036] Regarding the resin molding method according to the fifteenth aspect of the present disclosure, in the resin molding method according to the thirteenth or fourteenth aspect of the present disclosure described above, the following step is further included: pressing and extruding the annular resin part in the annular hole portion in the direction along the conveyance direction to the outside of the jig.

[0037] In the resin molding method as described above, an annular resin part can be obtained as a single body.

[0038] The resin molding method of the sixteenth aspect of the present disclosure includes the following steps: starting the supply of a powdery resin composition containing a thermosetting resin into the extrusion conveying path from the upstream side in the conveying direction; rotating a screw extending in the extrusion conveying path along the conveying direction to knead and convey the powdery resin composition; heating the inside of the extrusion conveying path so that at least a part of the powdery resin composition conveyed in the extrusion conveying path melts to generate a resin kneaded body; closing the outlet provided on the downstream side in the conveying direction of the extrusion conveying path; when a predetermined amount of the resin kneaded body is supplied to an annular space defined between the tip of the screw and the extrusion conveying path, opening the outlet, and moving the screw in such a manner that its tip portion and the resin kneaded body around it are output from the outlet to the outside of the extrusion conveying path; and cutting the resin kneaded body output from the outlet to the outside of the extrusion conveying path together with the screw at a position close to the outlet to form an annular resin part.

[0039] In the resin molding method as described above, an annular resin part that can be uniformly heated can be formed. In addition, during the molding of the annular resin part, the annular resin part can also be preheated uniformly. Moreover, since uniform heating of the resin in the chamber can be achieved, high-frequency preheating before molding is not required or can be shortened. Furthermore, since the resin part is annular, it can be heated to a predetermined temperature in a shorter time compared with the case of using a flat plate-shaped resin part.

[0040] The manufacturing method of the motor core according to the seventeenth aspect of the present disclosure includes the following steps: starting the supply of the powdery resin composition containing the thermosetting resin in the extrusion conveying path from the upstream side in the conveying direction; rotating a screw extending along the conveying direction in the extrusion conveying path to knead and convey the powdery resin composition; heating the inside of the extrusion conveying path to melt at least a part of the powdery resin composition conveyed in the extrusion conveying path to generate a resin kneaded body; connecting one end of the annular hole portion of a jig having an annular hole portion to an output port provided on the downstream side in the conveying direction of the extrusion conveying path; supplying the resin kneaded body from the output port into the annular hole portion; when a predetermined amount of the resin kneaded body is supplied into the annular hole portion, cutting the resin kneaded body between the output port of the extrusion conveying path and the annular hole portion to form an annular resin member; putting the formed annular resin member into an annular chamber; in a mold having a resin filling path communicating with the annular chamber, holding a motor core including a plurality of resin filling portions arranged in a ring shape at a predetermined interval so that the end of the resin filling path communicates with the plurality of resin filling portions; heating the annular resin member in the annular chamber to soften it; operating a plunger capable of moving in the annular chamber to fill the softened resin formed by the annular resin member in the annular chamber into the plurality of resin filling portions; and curing the softened resin filled in the plurality of resin filling portions.

[0041] In the manufacturing method of the motor core as described above, after forming the resin material as a material into a ring shape and heating the annular resin member in the chamber, there is no resin in the central portion which is a position far from the heating machine on the manufacturing device side, and the resin in the chamber can be heated evenly. In addition, since the resin is filled from the annular chamber into the resin filling portions arranged in a ring shape, the resin filling path connecting the resin filling portion and the chamber can be shortened. In connection with this, more resin material can be filled into the groove portion than in the conventional method.

[0042] Regarding the manufacturing method of the motor core according to the eighteenth aspect of the present disclosure, in the manufacturing method of the motor core according to the seventeenth aspect of the present disclosure as described above, the step of putting the formed annular resin member into the annular chamber includes the following steps: putting the annular resin member and the jig having the annular resin member accommodated therein into the annular chamber.

[0043] In the manufacturing method of the motor core as described above, there is no need to extrude the formed annular resin member from the jig, and the manufacturing process can be simplified.

[0044] Regarding the method for manufacturing a motor core according to the nineteenth aspect of the present disclosure, in the method for manufacturing a motor core according to the seventeenth aspect of the present disclosure described above, the step of introducing the formed annular resin member into the annular chamber includes the following steps: introducing the annular resin member, a jig that internally accommodates the annular resin member, and an extrusion ring whose tip is inserted from one end side of the annular hole of the jig, and the extrusion ring operates to fill the softened resin into the plurality of resin filling portions as a part of the plunger.

[0045] In the method for manufacturing a motor core as described above, there is no need to extrude the formed annular resin member from the jig, which can simplify the manufacturing process. In addition, since the extrusion ring is used to move the softened resin to the resin filling portion, there is no need to change the shape of the plunger according to the shape of the resin.

[0046] The method for manufacturing a motor core according to the twentieth aspect of the present disclosure includes the following steps: starting the supply of a powdery resin composition containing a thermosetting resin into the extrusion conveying path from the upstream side in the conveying direction; rotating a screw extending along the conveying direction in the extrusion conveying path to knead and convey the powdery resin composition; heating the inside of the extrusion conveying path to melt at least a part of the powdery resin composition conveyed in the extrusion conveying path to generate a resin kneaded body; closing the outlet provided on the downstream side in the conveying direction of the extrusion conveying path; when a predetermined amount of the resin kneaded body is supplied to an annular space defined between the tip of the screw and the extrusion conveying path, opening the outlet and moving the screw so that its tip and the resin kneaded body around it are output from the outlet to the outside of the extrusion conveying path; cutting the resin kneaded body output from the outlet to the outside of the extrusion conveying path together with the screw at a position close to the outlet to form an annular resin member; introducing the formed annular resin member into the annular chamber; holding a motor core including a plurality of resin filling portions arranged in a ring shape at a predetermined interval in a mold having a resin filling path communicating with the annular chamber so that the ends of the resin filling path communicate with the plurality of resin filling portions; heating the annular resin member in the annular chamber to soften it; operating a plunger capable of moving in the annular chamber to fill the softened resin formed by the softened annular resin member in the annular chamber into the plurality of resin filling portions; and curing the softened resin filled in the plurality of resin filling portions.

[0047] In the method for manufacturing a motor core as described above, after the resin material as a raw material is formed into a ring shape, the ring-shaped resin member is heated in a chamber. As a result, there is no resin in the central portion, which is a position far from the heating machine on the manufacturing device side, and the resin in the chamber can be heated evenly. In addition, since the resin is filled from the ring-shaped chamber into the resin filling portions arranged in a ring shape, the resin filling path connecting the resin filling portion and the chamber can be shortened. Accordingly, more resin material can be filled into the groove portion than in the conventional method.

[0048] Advantages of the Invention

[0049] According to the resin former and the resin forming method of the present disclosure, a resin capable of uniformly heating a resin member can be provided. In addition, according to the manufacturing device and the manufacturing method of the motor core of the present disclosure, the motor core can be stably manufactured using the resin obtained by uniformly heating the resin member. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 FIG. is a schematic explanatory view showing an example of a resin former according to an embodiment of the present disclosure.

[0051] Figure 2A FIG. is a schematic explanatory view showing an example of a resin former according to an embodiment of the present disclosure. Figure 1 FIG. is an operation explanatory view showing an example of the operation state of the resin former shown in FIG.

[0052] Figure 2B FIG. is a schematic explanatory view showing an example of a resin former according to an embodiment of the present disclosure. Figure 1 FIG. is an operation explanatory view showing an example of the operation state of the resin former shown in FIG.

[0053] Figure 3A FIG. is an operation explanatory view showing an example of the operation of compressing and extruding the resin member in the jig shown in FIG. Figure 1 FIG. is an operation explanatory view showing an example of the operation of compressing and extruding the resin member in the jig shown in FIG.

[0054] Figure 3B FIG. is an operation explanatory view showing an example of the operation of compressing and extruding the resin member in the jig shown in FIG. Figure 1 FIG. is an operation explanatory view showing an example of the operation of compressing and extruding the resin member in the jig shown in FIG.

[0055] Figure 3C FIG. is an operation explanatory view showing an example of the operation of compressing and extruding the resin member in the jig shown in FIG. Figure 1 FIG. is an operation explanatory view showing an example of the operation of compressing and extruding the resin member in the jig shown in FIG.

[0056] Figure 3D FIG. is an operation explanatory view showing an example of the operation of compressing and extruding the resin member in the jig shown in FIG. Figure 1 FIG. is an operation explanatory view showing an example of the operation of compressing and extruding the resin member in the jig shown in FIG.

[0057] Figure 4 FIG. is an explanatory view showing a state in which a diameter changing jig is applied to the resin former shown in FIG. Figure 1 FIG. is an explanatory view showing a state in which a diameter changing jig is applied to the resin former shown in FIG.

[0058] Figure 5 It is a flowchart showing an example of a resin molding method according to an embodiment of the present disclosure.

[0059] Figure 6 It is a schematic explanatory view showing an example of a manufacturing apparatus for a motor core according to an embodiment of the present disclosure.

[0060] Figure 7A It shows in Figure 6 A schematic perspective view showing an example of a rotor core used in the manufacturing apparatus for the motor core shown.

[0061] Figure 7B It shows in Figure 6 A schematic perspective view showing an example of an annular resin member used in the manufacturing apparatus for the motor core shown.

[0062] Figure 8 It is a flowchart showing an example of a manufacturing method for a motor core according to an embodiment of the present disclosure.

[0063] Figure 9 It shows Figure 6 An operation explanatory view showing an example of the operation state of the manufacturing apparatus for the motor core shown.

[0064] Figure 10 It shows Figure 6 An operation explanatory view showing an example of the operation state of the manufacturing apparatus for the motor core shown.

[0065] Figure 11 It shows Figure 6 An operation explanatory view showing an example of the operation state of the manufacturing apparatus for the motor core shown.

[0066] Figure 12 It shows Figure 6 An operation explanatory view showing an example of the operation state of the manufacturing apparatus for the motor core shown.

[0067] Figure 13A It is a schematic cross-sectional view showing an example of an input member that can be inserted into the chamber.

[0068] Figure 13B It is a schematic cross-sectional view showing another example of an input member that can be inserted into the chamber.

[0069] Figure 14 It shows an example of a modified form of the input member that can be inserted into Figure 13A The figure corresponding to the state of the manufacturing apparatus for the motor core shown and Figure 9 Shown.

[0070] Figure 15It represents the ability to input Figure 13B A diagram showing the state corresponding to the motor core manufacturing apparatus of another modified example of the input member shown Figure 9 in the figure

[0071] Figure 16A It is an explanatory diagram for explaining a modified example of the first input member

[0072] Figure 16B It is an explanatory diagram for explaining a modified example of the first input member

[0073] Figure 17 It represents Figure 6 A diagram showing the state corresponding to the motor core manufacturing apparatus of yet another modified example of the motor core manufacturing apparatus shown Figure 9 in the figure

[0074] Figure 18 It represents the state after the lower die of the motor core manufacturing apparatus shown Figure 17 descends

[0075] Figure 19 It is a schematic explanatory diagram of an example of a resin former which is a modified example of an embodiment of the present disclosure

[0076] Figure 20A It represents Figure 19 An operation explanatory diagram of an example of the operation state of the resin former shown

[0077] Figure 20B It represents Figure 19 An operation explanatory diagram of an example of the operation state of the resin former shown

[0078] Figure 20C It represents Figure 19 An operation explanatory diagram of an example of the operation state of the resin former shown

[0079] Figure 21 It is a flowchart of an example of a resin molding method which is a modified example of an embodiment of the present disclosure Detailed implementation manners

[0080] This application is based on Japanese Patent Application No. 2022-198170 filed in Japan on December 12, 2022, the content of which forms a part of this application as the content of this application

[0081] In addition, the present disclosure can be more fully understood through the following detailed description. Through the following detailed description, the further application scope of the present application will become more apparent. However, the detailed description and specific examples are the preferred embodiments of the present disclosure and are only described for illustrative purposes. This is because, based on this detailed description, various changes and modifications are obvious to those skilled in the art within the spirit and scope of the present disclosure.

[0082] The applicant does not intend to dedicate any of the described embodiments to the public, and the disclosed changes and alternatives that may not be included within the scope of the claims in terms of expression are also considered part of the present invention under the doctrine of equivalents.

[0083] Hereinafter, each embodiment for implementing the present disclosure will be described with reference to the drawings. It should be noted that hereinafter, the scope required for the description for achieving the purpose of the present disclosure is schematically shown, and mainly the scope required for the description of the corresponding part of the present disclosure is described, and the parts omitted from the description are assumed to be based on well-known techniques. In addition, the same or corresponding components in the drawings are labeled with the same or similar reference numerals, and repeated descriptions are omitted. Moreover, in the case where a plurality of the same or corresponding components are included in one drawing, in order to easily understand the drawing, only some of the components may be labeled with reference numerals.

[0084] <Resin Molder>

[0085] Figure 1 is a schematic explanatory diagram showing an example of a resin molder according to an embodiment of the present disclosure. The resin molder 100 of the present embodiment can be a molder that can be used in a manufacturing apparatus for a motor core and can mold an annular resin member P. As Figure 1 shown, the resin molder 100 mainly includes an extruder 101 and a jig 130. In the following description, for the sake of easy understanding, sometimes the Figure 1 X direction shown is set as the left-right direction, the Y direction is set as the front-rear direction, and the Z direction is set as the height direction (or up-down direction) for description.

[0086] The extruder (sometimes also referred to as an "extruder") 101 can extend in one direction, for example, in the up-and-down direction, and is used to knead the powdery resin composition P1 supplied to the upstream side in the conveying direction, that is, the upper side, and convey it to the downstream side in the conveying direction, that is, the lower side. The extruder 101 at least includes: a sleeve 110 as an example of an extrusion conveying path, which extends in the up-and-down direction and conveys the powdery resin composition P1 inside it; a sleeve heater 115 as an example of a former-side heater, which can heat the powdery resin composition P1; a screw 120, which extends in the conveying direction inside the sleeve 110; and a motor 125 as an example of a rotating device for rotating the screw 120.

[0087] The sleeve 110 can also constitute a conveying path for kneading the powdery resin composition P1 supplied to the upstream side in the conveying direction and conveying it to the downstream side in the conveying direction. The sleeve 110 of the present embodiment can be composed of a cylindrical member with one end closed and the other end open. It can be that a supply port 111 for supplying the powdery resin composition P1 is formed at one end of the sleeve 110 on the upstream side in the conveying direction, and an output port 112 is formed at the other end on the downstream side in the conveying direction. It can be that a resin composition supply path 113 is connected to the supply port 111, and a resin composition supply source 114 is connected to the resin composition supply path 113. It should be noted that in the present embodiment, it is exemplified that the conveying direction inside the sleeve 110 extends in the up-and-down direction, but the extending direction of the sleeve 110 is not limited to this. For example, the conveying direction can also extend obliquely downward, and can also extend in the left-right direction or the front-back direction.

[0088] The powdery resin composition P1 supplied to the inside of the sleeve 110 from the supply port 111 can use a composition mainly containing a thermosetting resin material such as an epoxy resin, a phenolic resin, an unsaturated polyester resin, or a cyanate resin. In addition, in the powdery resin composition P1, in addition to adding a thermosetting resin composition, a curing agent, a filler, etc. can also be added.

[0089] In addition, the powdery resin composition P1 mentioned here refers to a resin composition formed by relatively small particles such as granular or particulate (including particles such as small pieces obtained by crushing and breaking relatively large resin blocks). It should be noted that not all of the resin composition supplied from the supply port 111 needs to be powdery. Specifically, for example, at least a part of it can also be paste-like or clay-like.

[0090] The sleeve heater 115 can be a device that heats the powdered resin composition P1 conveyed within the sleeve 110. The sleeve heater 115 can be composed of a known heater, such as an infrared heater or a sheath heater, and can be arranged inside the sleeve 110, for example, in a manner that substantially encloses the entire length of the conveying path within the sleeve 110.

[0091] The sleeve heater 115 can also melt at least a part of the powdered resin composition P1 conveyed within the sleeve 110 and heat it to a temperature at which the particles constituting the resin composition are welded to each other. More preferably, the powdered resin composition P1 heated by the sleeve heater 115 can be heated to a specified temperature above its melting temperature and lower than its softening temperature. In connection with this, the extruder 101 can also include a temperature sensor that detects the temperature of the powdered resin composition P1 conveyed within the sleeve 110 or the room temperature within the sleeve 110.

[0092] The screw 120 can knead the powdered resin composition P1 supplied from the supply port 111 into the sleeve 110 and convey it toward the output port 112. The screw 120 includes a screw body 121 that extends along the conveying direction at a specified interval from the inner wall surface of the sleeve 110 and fins 122 formed on the outer peripheral surface of the screw body 121.

[0093] The screw body 121 can be composed of a cylinder having an outer diameter smaller than the inner diameter of the sleeve 110. A motor 125 is assembled at its base end portion, and its tip portion can be disposed near the output port 112. In addition, it is preferable to form a blocking block 123 without fins 122 at the tip portion of the screw body 121. The blocking block 123 is formed by a cylinder extending to a position substantially the same as the output port 112 and can have a function of assisting the resin kneaded body P2 output from the output port 112 to become annular.

[0094] The fins 122 can be formed by ridges that stand up from the outer peripheral surface of the screw body 121 in a direction crossing its axial direction. In addition to this, the fins 122 can be one or more ridges formed in a spiral shape on the outer peripheral surface of the screw body 121. The height of the top portion in the height direction of the fins 122 is preferably adjusted to contact the inner peripheral surface of the sleeve 110 or to face it with a slight gap. When the screw 120 rotates, the fins 122 squeeze and knead the powdered resin composition P1 supplied between the inner wall surface of the sleeve 110 and the screw body 121 in the conveying direction.

[0095] The motor 125 connected to the base end portion of the screw main body 121 can be a device that kneads and conveys the powdery resin composition P1 in the sleeve 110 by rotating the screw 120 at an arbitrary rotational speed to form a resin kneaded body P2. The motor 125 can also control the supply amount of the resin material in the sleeve 110 by controlling the rotational speed of the screw 120. In other words, the supply amount of the resin kneaded body P2 output from the outlet 112 can be adjusted with high precision by controlling the rotational speed of the motor 125.

[0096] According to the extruder 101 having the above configuration, the powdery resin composition P1 supplied to the supply port 111 of the sleeve 110 can be heated, kneaded, and conveyed by operating the screw 120 and the sleeve heater 115. The powdery resin composition P1 conveyed in the sleeve 110 is kneaded by the heat from the sleeve heater 115 and the kneading action achieved by the screw 120, and the resin kneaded body P2 formed by fusing particles with each other is output from the outlet 112.

[0097] In addition, in the above extruder 101, the sleeve 110 is formed in a cylindrical shape, and the screw main body 121 and the closing block 123 disposed in the sleeve 110 are formed of cylinders extending coaxially with the sleeve 110. Therefore, the resin kneaded body P2 output from the extruder 101 has an outer diameter substantially the same as the inner diameter of the sleeve 110 and an inner diameter substantially the same as the outer diameter of the screw main body 121, and has an annular shape. The resin former 100 of the present embodiment can simply form an annular resin part P having an arbitrary outer diameter and inner diameter by outputting the resin kneaded body P2 in an annular shape from the outlet 112 of the extruder 101.

[0098] The jig 130 receives the annular resin part P composed of the resin kneaded body P2 output from the outlet 112 of the sleeve 110. In the present embodiment, the jig 130 can be a jig that forms the resin kneaded body P2 supplied from the above extruder 101 into an annular resin part P. In association therewith, the jig 130 includes an annular hole portion 131 that can be connected to the outlet 112 of the sleeve 110.

[0099] The annular hole portion 131 can be an input port 132 whose one end can be connected to the output port 112, and can be formed by a cylindrical space. In order to accommodate the resin kneaded body P2 output from the output port 112, for this annular hole portion 131, it is preferable that its outer diameter is substantially the same as the inner diameter of the sleeve 110, or is greater than or equal to the inner diameter of the sleeve 110, and its inner diameter is substantially the same as the outer diameters of the screw main body 121 and the closing block 123, or is less than or equal to the outer diameters of the screw main body 121 and the closing block 123. In addition, since the resin kneaded body P2 accommodated in the annular hole portion 131 forms an annular resin member P, it is preferable to adjust the inner diameter and the outer diameter of the annular hole portion 131 to match the shape of the chamber 30 of the motor core manufacturing apparatus 1 described later. Therefore, it is preferable to set the inner diameter of the sleeve 110 and the inner diameters of the screw main body 121 and the closing block 123 to match the shape of the chamber 30 of the motor core manufacturing apparatus 1.

[0100] The jig 130 may further include a lid body 135 which is provided on the surface opposite to the surface where the input port 132 is formed and closes the end portion 133 on the downstream side in the conveying direction of the annular hole portion 131. The lid body 135 can cover the entire lower surface of the jig 130 as shown in Figure 1 or may be formed in an annular shape same as the annular hole portion 131 and is closed by being pressed into the lower side of the annular hole portion 131. By this lid body 135, the resin kneaded body P2 input from the input port 132 can be prevented from leaking out of the jig 130 from the end portion 133 located on the opposite side of the input port 132.

[0101] In addition, by providing this lid body 135, with the resin kneaded body P2 input into the annular hole portion 131 being in contact with the lid body 135, further input of the resin kneaded body P2 is continued, whereby the resin kneaded body P2 in the annular hole portion 131 can be pressurized and compressed. Therefore, the amount and shape of the resin kneaded body P2 accommodated in the annular hole portion 131 can be stabilized. It should be noted that when the above compression operation is not required and, in addition, there is no concern that the resin kneaded body P2 supplied into the annular hole portion 131 will fall off from the annular hole portion 131 later, the lid body 135 can be omitted.

[0102] Figure 2 is an operation explanatory diagram showing an example of the operation state of the resin former shown in Figure 1 and shows a state where the resin kneaded body P2 is filled into the jig 130, Figure 2A Figure 2B ​Indicates the state of cutting the resin kneaded body by the tool. In addition to the above configuration, the resin former 100 of the present embodiment may further include a tool 140 as an example of a cutting device for cutting the resin kneaded body P2 output from the output port 112 of the sleeve 110. It is preferable that the tool 140 can be disposed in an inserted manner between the output port 112 and the input port 132.

[0103] When the tool 140 is operated at an arbitrary timing, for example, at the timing when a desired amount of the resin kneaded body P2 is filled in the annular hole portion 131 (for example, Figure 2A the state shown), the resin kneaded body P2 can be cut at a position between the output port 112 and the input port 132 (refer to Figure 2B ). In addition, if the tool 140 is held at a position between the output port 112 and the input port 132 after cutting the resin kneaded body P2, it is possible to prevent the resin kneaded body P2 from being accidentally output when replacing the jig 130 or the like.

[0104] In the present embodiment, a configuration in which the resin kneaded body P2 is cut using the tool 140 is exemplified. However, the present disclosure is not limited to such a configuration as long as the resin kneaded body P2 can be separated at an arbitrary position. Specifically, for example, the resin kneaded body P2 may also be cut by the shearing force at the ends of the output port 112 and the input port 132 by relatively moving the sleeve 110 and the jig 130 in the horizontal direction. It should be noted that hereinafter, the annular resin kneaded body P2 separated from the extruder 101 by the tool 140 is referred to as "annular resin part P".

[0105] FIG. 3 is an operation explanatory diagram showing an example of an operation of compressing and extruding the resin part in the jig shown in Figure 1 . Specifically, Figure 3A shows the state before the operation of the pressure device, Figure 3B shows the state of operating the pressure device to compress the resin kneaded body from the state of Figure 3A , Figure 3C shows the state after removing the cover from the jig in the state of Figure 3B , Figure 3D shows the state of extruding the annular resin part out of the jig from the state shown in Figure 3C . As shown in FIG. 3, in addition to the above configuration, the resin former 100 of the present embodiment may further include a pressure device 150 that can pressurize the annular resin part P accommodated in the annular hole portion 131 from one end side of the annular hole portion 131.

[0106] The pressure device 150 may include: a pressure device main body 151 that can operate in the extending direction of the annular hole portion 131, such as the up and down direction; and an annular extrusion ring 152 that is assembled to one end of the pressure device main body 151 and can be inserted into the annular hole portion 131. The pressure device main body 151 may adopt a known press that can move up and down, such as the slider of a mechanical press. In addition, the extrusion ring 152 may be composed of a member having a shape matching the outer diameter and inner diameter of the annular hole portion 131. More preferably, the extrusion ring 152 is preferably shaped such that when the pressure device 150 operates, it is inserted into the annular hole portion 131 from the input port 132 of the annular hole portion 131 with substantially no gap.

[0107] When using the pressure device 150 to compress the annular resin member P in the annular hole portion 131, first, the jig 130 including the lid 135 is disposed under the pressure device 150 (refer to Figure 3A ). Next, the pressure device 150 is operated downward, the extrusion ring 152 is inserted into the annular hole portion 131 from the input port 132, and the annular resin member P in the annular hole portion 131 is compressed from above (refer to Figure 3B ). When this compression is performed, the density of the annular resin member P increases, so the shape retention of the annular resin member P improves and the voids in the annular resin member P can be reduced. In addition, as the shape retention improves, the processing of the annular resin member P becomes easier.

[0108] In addition, when the pressure device 150 is further operated, the annular resin member P can be extruded from the jig 130. In this case, first, after removing the lid 135 from the jig 130 (refer to Figure 3C ), the jig 130 is supported by a support unit (not shown). If the pressure device 150 is further operated downward, the annular resin member P can be separated from the jig 130 (refer to Figure 3D ). In the present embodiment, a case where the annular resin member P is separated from the jig 130 for use is exemplified, but it may also be used in the manufacturing device of the motor core described later in a state of being accommodated in the jig 130. Details will be described later.

[0109] In addition, the resin former 100 of the present embodiment may include a former side control device 160 for controlling the above various components. The former side control device 160 may be a device that can implement an arbitrary forming process by being electrically connected to each component of the resin former 100 and controlling its operation. The former side control device 160 is, for example, as Figure 1As shown by the dashed line in the figure, it can be communicatively connected to each component via wired or wireless communication. The former side control device 160 can be implemented using a sequencer (Programmable Logic Controller (PLC)), a well-known computer, etc. In addition, the former side control device 160 can be constituted by only one of the above computers, etc., or by combining a plurality of them.

[0110] The former side control device 160 can implement the resin molding method of the present embodiment described later by operating the above components. In connection with this, the resin molding method of the present embodiment can be provided in the following ways: a software program including instructions for causing a computer constituting the former side control device 160 to execute a specified operation, a form of a non-transitory computer-readable recording medium storing the program, or a form of an application program provided via a network, etc. Details of the resin molding method of the present embodiment will be described later.

[0111] In the resin former 100 of the above embodiment, an example is shown in which the inner diameter and outer diameter of the output port 112 and the input port 132 are adjusted to be substantially the same. On the other hand, in the manufacturing device 1 of a motor core using a ring-shaped resin member P, the dimensions of the motor core filled with resin, such as the rotor core 2, can be changed in various ways. Therefore, it is preferable that the outer diameter and inner diameter of the ring-shaped resin member formed by the resin former 100 can also be easily changed. Therefore, hereinafter, a case where an example of a configuration for changing the diameter of the resin is adopted in the resin former 100 of the present embodiment will be described.

[0112] Figure 4 It shows the application of the diameter change jig to Figure 1 The state of the resin former shown in the figure. As Figure 4 shown, the resin former 100 of the present embodiment can include a diameter change jig 170 for changing the diameter of the resin kneaded body P2 output from the output port 112. The diameter change jig 170 can include: an annular first opening 171 that can communicate with the output port 112 of the sleeve 110; an annular second opening 172, at least one of the outer diameter and inner diameter of which is different from that of the first opening 171; and a communication path 173 connecting the first opening 171 and the second opening 172. It can be that the second opening 172 can communicate with the input port 132 of the annular hole 131.

[0113] In the diameter-changing fixture 170, the inner diameters and outer diameters of the first opening 171 and the second opening 172 are different. Therefore, it is possible to connect between the output port 112 and the input port 132 having different outer diameters and inner diameters. By using such a diameter-changing fixture 170, it is possible to simply mold the annular resin member P having different outer diameters and inner diameters with one extruder 101. The diameter-changing fixture 170 is preferably provided in the form of an accessory for the extruder 101. In connection therewith, for the diameter-changing fixture 170, it is preferable to prepare in advance a plurality of types of diameter-changing fixtures 170 having different shapes of the first opening 171 and the second opening 172, and selectively assemble them to the extruder 101 in accordance with the annular resin member P to be molded and the fixture 130 for the resin member P for use.

[0114] The shape of the annular resin member P molded by the resin former 100 can be changed, for example, by using the above-described diameter-changing fixture 170, regardless of the shape of the output port 112 of the sleeve 110. This change can also be implemented in the case of using other than the diameter-changing fixture 170. For example, first, a fixture having at least one of the outer diameter and the inner diameter of the annular hole portion larger than the outer diameter and the inner diameter of the output port 112 of the sleeve 110 is prepared. Then, if the resin kneaded body P2 is input into the annular hole portion of the fixture and cut, and then compressed by the pressure device 150, the annular resin member P in the annular hole portion 131 expands in the radial direction within the annular hole portion 131, and its shape can be changed.

[0115] As described above, according to the resin former 100 of the present embodiment, the annular resin member P having a desired size can be molded from the powdery resin composition P1 as a material. The annular resin member P molded here is formed with a through hole H in the central portion (see Figure 7B ), and therefore, when melted and softened, a local temperature difference is not easily generated, and uniform heating can be achieved.

[0116] Next, the resin molding method of the present embodiment will be described. In the following description of the resin molding method, the case of manufacturing the annular resin member P using the above-described resin former 100 will be described by way of example, but this method can also be implemented using a device other than the resin former 100.

[0117] <Resin Molding Method>

[0118] Figure 5The figure is a flowchart showing an example of a resin molding method according to an embodiment of the present disclosure. The resin molding method of this embodiment at least includes: a step of starting to supply a powdery resin composition P1 into the sleeve 110 from the upstream side in the conveying direction (corresponding to step S03 described later); a step of rotating a screw 120 extending in the conveying direction in the sleeve 110 to knead and convey the powdery resin composition P1; a step of heating the inside of the sleeve 110 to melt at least a part of the powdery resin composition P1 conveyed in the sleeve 110 to generate a resin kneaded body P2 (corresponding to step S01 described later); a step of connecting one end of the annular hole portion 131 of a jig 130 having an annular hole portion 131 to an outlet 112 provided on the downstream side in the conveying direction of the sleeve 110 (corresponding to step S04 described later); a step of supplying the resin kneaded body P2 from the outlet 112 into the annular hole portion 131 (corresponding to step S05 etc. described later); when a predetermined amount of the resin kneaded body P2 is supplied into the annular hole portion 131 (corresponding to step S06 described later), a step of cutting the resin kneaded body P2 between the outlet 112 of the sleeve 110 and the annular hole portion 131 to mold an annular resin part P (corresponding to steps S07 to S09 described later). Details are described below.

[0119] The resin molding method of this embodiment is further described in detail. First, the sleeve heater 115 is operated to start heating the inside of the sleeve 110 (step S01). Next, the motor 125 is operated to start the rotation operation of the screw 120 (step S02), and at the same time, the resin composition supply source 114 is operated to start supplying the powdery resin composition P1 to the supply port 111 of the sleeve 110 (step S03). By the rotation operation of the screw 120 and the heat from the sleeve heater 115, the powdery resin composition P1 supplied to the supply port 111 is conveyed and kneaded, and at least a part of it is melted, thereby generating a resin kneaded body P2.

[0120] In addition, the sleeve 110 and the jig 130 are connected in order to input the resin kneaded body P2 into the jig 130 (step S04). More specifically, the outlet 112 of the sleeve 110 and the inlet 132 of the jig 130 are connected (refer to Figure 2A ). In order to smoothly perform such a connection operation, it is preferable that the jig 130 can be continuously connected to the sleeve 110 using a conveying unit such as a conveyor belt, a cylinder, or a multi-axis robot (not shown). It should be noted that the order of the above steps S01 to S04 can be appropriately changed.

[0121] After the above-described steps S01 to S04 are completed, when a predetermined time has elapsed, the resin kneaded body P2 conveyed as the screw 120 rotates is output from the output port 112, and the supply of the resin kneaded body P2 into the annular hole portion 131 of the jig 130 is started (step S05). Then, when the supply amount of the resin kneaded body P2 into the annular hole portion 131 reaches a predetermined supply amount (Yes in step S06), as Figure 2B shown, a cutter 140 is inserted between the output port 112 and the input port 132 to cut the resin kneaded body P2 (step S07). Through this step S07, an annular resin member P can be formed in the annular hole portion 131.

[0122] In addition, the jig 130 that internally houses the annular resin member P by the above-described cutting can, for example, start the compression operation of the annular resin member P (step S08) after being moved to a position facing the pressure device 150 using a conveying unit (not shown) (refer to Figure 3A ). This compression operation can be performed by inserting the extrusion ring 152 of the pressure device 150 into the annular hole portion 131 from the input port 132 of the jig 130 (refer to Figure 3B ). In order not to extrude the annular resin member P from the annular hole portion 131 by this compression operation, it is preferable to attach a cover 135 to one surface of the jig 130.

[0123] Furthermore, by further operating the pressure device 150, the annular resin member P compressed through step S08 can be taken out from the jig 130. Specifically, first, the cover 135 of the jig 130 is removed (refer to Figure 3C ). Then, the annular resin member P in the annular hole portion 131 can be taken out by further pressing the extrusion ring 152 of the pressure device 150 into the annular hole portion 131 and extruding the annular resin member P in the annular hole portion 131 from the end portion 133 on the opposite side of the input port 132 (step S09) (refer to Figure 3D ). The annular resin member P extruded from the jig 130 is supplied to the manufacturing device 1 of the motor core described later and can be used for the assembly of the permanent magnet 3 into the groove portion 4 of the rotor core 2.

[0124] As described above, according to the resin molding method of the present embodiment, an annular resin member capable of achieving uniform heating can be molded in the manufacturing device of the motor core.

[0125] Next, the manufacturing device 1 of the motor core and the manufacturing method of the motor core using the above-described resin molding machine 100 and resin molding method will be described.

[0126] <Manufacturing Device of Motor Core>

[0127] Figure 6This is a schematic explanatory diagram showing an example of a manufacturing apparatus for a motor core according to an embodiment of the present disclosure. The manufacturing apparatus 1 for the motor core according to this embodiment may be an apparatus for assembling a permanent magnet 3 into a groove portion 4 formed in a motor core, such as an inner rotor type rotor core 2. Further, the assembly of the permanent magnet 3 may be achieved by resin molding. Note that, in this embodiment, the rotor core 2 is exemplified as the motor core, but the present disclosure is not limited thereto. Specifically, the manufacturing apparatus 1 for the motor core may be used, for example, for resin molding a portion wound with a coil of a stator core as the motor core, or for filling resin into a through hole provided axially in an unriveted laminated core to integrally fix the laminated core.

[0128] Figure 7A and Figure 7B are schematic perspective views respectively showing an example of the rotor core and an annular resin member of the manufacturing apparatus for the motor core shown in Figure 6 . As shown in Figure 7A , the rotor core 2 may be formed of a substantially cylindrical magnetic body formed by laminating a plurality of thin electromagnetic steel sheets. A through hole 5 for inserting a shaft constituting a rotating shaft when assembled into a motor may be provided in the axial center portion of the rotor core 2. Further, a plurality of (four in Figure 7A ) groove portions 4 extending in the axial center direction of the rotor core 2 are annularly arranged on the rotor core 2 so as to surround the through hole 5. The groove portion 4 may be formed in a shape into which the permanent magnet 3 (refer to Figure 6 ) can be inserted, for example, a rectangular parallelepiped shape or an arc-shaped through hole penetrating in the wall thickness direction of the rotor core 2, but its specific shape is not particularly limited. Similarly, its number may be arbitrarily changed, and may be more than the four shown in Figure 7A , and may be set to about 10 to 40, for example.

[0129] The permanent magnet 3 is inserted and fixed inside the groove portion 4 of the rotor core 2. The permanent magnet 3 may be formed, for example, of a rectangular parallelepiped slightly smaller than the groove portion 4 or a block having an arc shape in plan view. Further, the permanent magnet 3 may or may not be magnetized at the time of being inserted into the groove portion 4. Moreover, the permanent magnet 3 may or may not be divided in the stacking direction or a direction orthogonal to the stacking direction. When the permanent magnet 3 is inserted into the groove portion 4, a gap is at least partially formed between the outer peripheral surface of the permanent magnet 3 and the inner peripheral surface of the groove portion 4. The gap formed in the groove portion 4 may function as a filling space 6 as an example of a resin filling portion. When the rotor core 2 is placed on the lower mold 22, the plurality of filling spaces 6 can communicate with the ends of the resin filling paths 25, respectively.

[0130] The manufacturing apparatus 1 of the motor core according to the present embodiment includes the above-described resin former 100. In association therewith, the annular resin member P used in the manufacturing apparatus 1 of the motor core is an annular resin member P mainly containing a thermosetting resin formed by the above-described resin former 100. As Figure 7B shown, the annular resin member P may be composed of a resin molded body formed into an annular shape having a predetermined wall thickness, preferably an annular shape. In other words, the annular resin member P of the present embodiment can be said to be a resin molded body formed into an annular shape having a through hole H in its central portion. The detailed dimensions and the like of the annular resin member P can be adjusted by adjusting the respective constituent elements of the resin former 100 in accordance with the shapes of the chamber 30 and the resin filling path 25 described later, the capacity of the filling space 6, and the like.

[0131] The manufacturing apparatus 1 of the motor core according to the present embodiment includes, in addition to the resin former 100 that forms the annular resin member, as Figure 6 shown, at least: a mold 20 that can hold the rotor core 2; an annular chamber 30 that can accommodate the annular resin member P; an annular plunger 35 as an example of a plunger that can move within the chamber 30; and a manufacturing apparatus side heater 40 disposed around the mold 20 and the chamber 30. In addition, the above-described respective constituent elements may be accommodated in the manufacturing apparatus main body 10 or assembled to appropriate portions of the manufacturing apparatus main body 10.

[0132] The manufacturing apparatus main body 10 may include: a base 11; a plurality of (for example, four) columns 12 erected on the surface of the base 11; and a top plate 13 supported at the top portions of the columns 12. The top plate 13 has a top mold 21 of the mold 20 described later fixed to its lower surface, and can be moved up and down in the vertical direction together with the columns 12 and the top mold 21 by using an actuator (not shown). The lifting operation of the top plate 13 can be mainly performed when holding the rotor core 2 in the mold 20 or removing and outputting the rotor core 2 from the mold 20.

[0133] The mold 20 is a member for holding the rotor core 2. Specifically, the mold 20 may include a top mold 21 that abuts against and supports the upper portion of the rotor core 2, specifically, its upper surface, and a bottom mold 22 that abuts against and supports the lower portion of the rotor core 2, specifically, its lower surface.

[0134] Inside the bottom mold 22, a resin filling path 25 for supplying the softened resin to the plurality of filling spaces 6 of the rotor core 2 placed on the bottom mold 22 may be provided. The path structure of the resin filling path 25 is preferably changed in accordance with the number, shape, and the like of the filling spaces 6 of the rotor core 2, the shape of the chamber 30, and the like, but preferably has a structure that connects the filling space 6 and the chamber 30 at the shortest distance.

[0135] The rotor core 2 filled with resin in the slot portion 4 can often be changed to other shapes. Therefore, regarding the lower mold 22, it is advisable to prepare in advance a plurality of lower molds having resin filling paths 25 with different structures and appropriately replace them according to the rotor core 2 held in the mold 20 for use. In addition, the lower mold 22 may further include a lifter 26 capable of lifting the lower mold 22 to put the annular resin member P into the chamber 30, clean the resin filling path 25, and the like.

[0136] In addition, as described above, the upper mold 21 can move in the vertical direction together with the top plate 13. And when the rotor core 2 is placed on the lower mold 22, the upper mold 21 descends to press the upper surface (or the lower surface) of the rotor core 2 with a specified pressing force, whereby the rotor core 2 can be held between the upper mold 21 and the lower mold 22. The shape, material, etc. of the surfaces of the upper mold 21 and the lower mold 22 that come into contact with the rotor core 2 can be adjusted so that when resin is filled into the filling space 6, the filled resin does not leak out of the rotor core 2. Specifically, it can be adjusted so that the contact surface becomes airtight when the rotor core 2 is clamped by the upper mold 21 and the lower mold 22.

[0137] In the present embodiment, as described above, a structure in which the upper mold 21 moves up and down together with the top plate 13 is adopted. However, as long as it is a structure capable of relatively changing the vertical positions of the upper mold 21 and the lower mold 22, other structures can also be adopted. Specifically, for example, a structure in which the lower mold 22 moves in the vertical direction, or a structure in which both the upper mold 21 and the lower mold 22 move in the vertical direction can be adopted instead of the structure in which the upper mold 21 moves in the vertical direction.

[0138] In the present embodiment, as the slot portion 4 of the rotor core 2, a rectangular parallelepiped shape structure that is open in the vertical direction and substantially has no gap in the front-rear and left-right directions is exemplified. Therefore, the upper mold 21 and the lower mold 22 adopt a structure having a substantially flat contact surface, but the shape of the contact surface of the upper mold 21 and the lower mold 22 can be appropriately changed according to the shape of the held rotor core 2. For example, when the manufacturing apparatus 1 of the motor core of the present embodiment is used for resin molding of an inner rotor type stator core, it is advisable to adopt a structure including a protrusion to be inserted into the space formed in the center of the stator core as the upper mold 21 and the lower mold 22.

[0139] The chamber (sometimes also referred to as a "pot") 30 forms an annular space into which the annular resin member P to be filled in the filling space 6 can be inserted. In other words, the chamber 30 is constituted by a substantially cylindrical space formed inside a support table 31 provided on the base 11 and extending in the vertical direction. And this chamber 30 communicates with the resin filling path 25 formed in the lower mold 22. It should be noted that in the present embodiment, as the shape of the chamber 30, a shape formed by an annular space when viewed from above is exemplified, but it can be appropriately changed according to the shape of the inserted annular resin member P and the like.

[0140] The annular plunger 35 can be a member for conveying the resin in the chamber 30 constituted by the annular space toward the resin filling path 25. Therefore, it is sufficient that at least the pressing surface 37 at the upper part of the annular plunger 35 is annular, and the pressing surface 37 can be arranged to close the bottom of the annular plunger 35. In this case, the pressing surface 37 also functions as the bottom surface of the chamber 30. In addition, a lifting arm 36 connected to an actuator (not shown) can be assembled on the surface of the annular plunger 35 opposite to the pressing surface 37. The operation of the actuator is transmitted to the annular plunger 35 via the lifting arm 36, whereby the pressing surface 37 moves up and down in the chamber 30.

[0141] The manufacturing apparatus side heater 40 can be constituted by a known heater or the like, and can be a device for heating an appropriate part in the manufacturing apparatus main body 10. The manufacturing apparatus side heater 40 of the present embodiment at least includes a mold heater 41 disposed in the mold 20 and a chamber outer peripheral heater 42 disposed around the outside of the annular chamber 30.

[0142] It is preferable that the mold heater 41 is disposed in at least one of the upper mold 21 and the lower mold 22. In addition, the chamber outer peripheral heater 42 is preferably disposed at a position close to the outer wall surface of the annular chamber 30 so as to surround the periphery of the chamber 30. The mold heater 41 and the chamber outer peripheral heater 42 or the chamber inner peripheral heater 43 described later can be the same as the sleeve heater 115, and a known heater can be used. Specifically, an infrared heater or a sheathed heater can be used.

[0143] After the annular resin member P is inserted into the chamber 30, when the chamber outer peripheral heater 42 is operated, the annular resin member P can be heated. Here, since the annular resin member P is formed with a through hole H, the entire resin is disposed at a relatively close distance from the chamber outer peripheral heater 42. Thus, when the annular resin member P in the chamber 30 is heated to be softened, the local temperature difference that may be caused by the difference in distance from the heat source (for example, the chamber outer peripheral heater 42) can be suppressed to be small.

[0144] In addition to the above-described mold heater 41 and chamber peripheral heater 42, the manufacturing apparatus side heater 40 may further include a chamber inner peripheral heater 43 disposed around the inner periphery of the annular chamber 30. For the chamber inner peripheral heater 43 of the present embodiment, an example is shown in which it is provided on the columnar protrusion 22A formed at the center of the lower surface of the lower mold 22 and forming the inner wall surface of the chamber 30. The chamber inner peripheral heater 43 provided on the protrusion 22A is preferably disposed along the inner wall surface of the chamber 30 at the central portion of the annular chamber 30. In the present embodiment, since an annular resin member P is used instead of a flat resin as the resin, a heater can also be provided around the inner periphery of the resin. By providing this chamber inner peripheral heater 43, the inner portion of the annular resin member P located at a position relatively far from the chamber peripheral heater 42 can be assisted in heating. Therefore, more reliable uniform heating of the resin member can be performed. It should be noted that the manufacturing apparatus side heater 40 of the present embodiment is not limited to the above-described various heaters. For example, a heater may be separately provided at a position adjacent to the pressing surface 37 of the annular plunger 35.

[0145] The manufacturing apparatus 1 for the motor core of the present embodiment may further include a manufacturing apparatus side control device 50 for controlling the above-described respective components. The manufacturing apparatus side control device 50 may be a device that can achieve an arbitrary manufacturing process by being electrically connected to the above-described respective components and controlling their operations. For example, as shown by the dashed line in Figure 6 FIG., the manufacturing apparatus side control device 50 can be communicably connected to the respective components via wired or wireless communication. Similar to the former side control device 160 of the former, the manufacturing apparatus side control device 50 can be implemented using a sequencer, a well-known computer, etc. In addition, the manufacturing apparatus side control device 50 may be constituted by only one of the above-described computers, etc., or by combining a plurality of them.

[0146] The manufacturing apparatus side control device 50 can achieve the manufacturing method of the motor core of the present embodiment described later by causing the above-described respective components to operate. In connection with this, the manufacturing method of the motor core of the present embodiment can be provided in the following ways: a software program or the like containing instructions for causing a computer constituting the manufacturing apparatus side control device 50 to execute a predetermined operation, a non-transitory recording medium storing the program, or an application program provided via a network or the like. Details of the manufacturing method of the motor core of the present embodiment will be described later.

[0147] In the manufacturing apparatus 1 of the motor core having the above-described configuration, it should be particularly noted that the plurality of filling spaces 6 of the rotor core 2 for resin filling are arranged in a ring shape at a prescribed interval and the chamber 30 is ring-shaped. As in the present embodiment, if the arrangement of the filling spaces 6 is substantially the same as the outer diameter of the chamber 30, the length of the resin filling path 25 connecting the chamber 30 and the filling spaces 6 is shorter than, for example, the case where the chamber is located at the center of the apparatus in the past. Therefore, in the manufacturing apparatus 1 of the motor core according to the present embodiment, compared with the conventional apparatus, the time required to pass through the resin filling path 25 can be shortened, and more resin material can be filled into the groove portion 4 than in the conventional method.

[0148] As described above, in the manufacturing apparatus 1 of the motor core according to the present embodiment, by making both the chamber 30 and the ring-shaped resin member P to be introduced into the chamber 30 ring-shaped, a temperature difference is not easily generated when heating the resin member, and heating can be performed uniformly. For the resin softened by heating in the chamber 30, the temperature difference during heating is suppressed, so that the curing reaction can also be performed uniformly. Therefore, clogging of the resin filling path 25 and reduction in fluidity caused by the curing reaction proceeding contrary to intention can be suppressed. In addition, by molding the ring-shaped resin member using the resin molding machine 100, preheating can also be performed uniformly. Moreover, since uniform heating of the resin in the chamber 30 can be achieved, high-frequency preheating before molding is not required or can be shortened.

[0149] In addition, by making the shape of the chamber 30 match the arrangement of the filling spaces 6 to be ring-shaped, the length of the resin filling path 25 can be shortened, and the curing reaction of the resin can be suppressed from proceeding in the resin filling path 25. Thereby, the resin can be sufficiently filled into the groove portion 4.

[0150] In connection with the above, it is preferable to set the outer diameter and inner diameter of the chamber 30 in consideration of the arrangement of the filling spaces 6. Preferably, the outer diameter and inner diameter of the chamber are adjusted so that the distance between the chamber 30 and the filling spaces 6 is as short as possible. If the distance between the chamber 30 and the filling spaces 6 is short, the resin filling path 25 connecting the chamber 30 and the filling spaces 6 can also be shortened.

[0151] Next, the manufacturing method of the motor core of the present embodiment will be described. In the following description of the manufacturing method of the motor core, the case of manufacturing the rotor core 2 using the above-described manufacturing apparatus 1 of the motor core will be described by way of example, but it can also be achieved using an apparatus other than the manufacturing apparatus 1 of the motor core.

[0152] <Manufacturing Method of Motor Core>

[0153] Figure 8 It represents in Figure 1Flowchart of an example of the manufacturing process implemented in the manufacturing apparatus of the motor core shown. In addition, Figures 9 to 12 is a diagram showing Figure 6 an example of the operating state of the manufacturing apparatus of the motor core shown. Hereinafter, mainly with reference to Figures 8 to 12 the manufacturing method of the motor core of the present embodiment will be described. It should be noted that the manufacturing method of the motor core of the present embodiment includes, in addition to Figure 8 the series of manufacturing processes shown, the resin molding method of the present embodiment described above. Therefore, after implementing the Figure 5 resin molding method shown, the manufacturing process shown in Figure 8 is implemented. It should be noted that in Figures 9 to 12 , in order to make the figure easy to observe, members having a low relevance to a series of operations and their reference numerals are partially omitted.

[0154] When implementing the manufacturing method of the motor core of the present embodiment, first, a ring-shaped resin member P is formed by implementing the Figure 5 series of processes shown. When the ring-shaped resin member P is formed, as shown in Figure 9 , the elevator 26 is operated to raise the lower mold 22, and thereby the formed ring-shaped resin member P is put into the exposed chamber 30 (step S11). The ring-shaped resin member P put into the chamber 30 is placed on the pressing surface 37 of the ring-shaped plunger 35. The size of the ring-shaped resin member P put into the chamber 30 can be adjusted in consideration of the filling space 6 of the rotor core 2 and the size of the resin filling path 25 to be held later.

[0155] Preferably, before the above step S11, the chamber 30 is preheated. The preheating of the chamber 30 can be achieved, for example, by operating at least one of the outer peripheral heater 42 and the inner peripheral heater 43 of the chamber.

[0156] Next, before or after inserting the ring-shaped resin member P into the chamber 30, or in parallel with the insertion of the ring-shaped resin member P, a permanent magnet 3 and a rotor core 2 for assembling the permanent magnet 3 are prepared, and the permanent magnet 3 is inserted into the groove portion 4 of the rotor core 2 (step S12). Then, preheating of the mold 20 and the rotor core 2 is performed (step S13). The preheating of the mold 20 can be performed using, for example, a mold heater 41. The preheating of the rotor core 2 can be performed separately from the preheating of the mold 20 using a known heating unit (not shown), etc., but if the mold heater 41 is operated while the rotor core 2 is placed on the lower mold 22, it can also be performed simultaneously with the preheating of the mold 20. When preheating the mold 20 and the rotor core 2 simultaneously, it is preferable to perform a step S14 described later before step S13. The preheating temperatures of the mold 20 and the rotor core 2 can be set to about 100°C to 180°C, for example. It should be noted that this preheating can also be performed only on either the mold 20 or the rotor core 2.

[0157] Moreover, the order of step S12 and step S13 can be changed. In this case, after preheating the rotor core 2 and the mold 20, a preheated or non-preheated permanent magnet 3 is inserted into the groove portion 4 of the rotor core 2.

[0158] When the preheating of the mold 20 and the rotor core 2 is completed, as Figure 10 shown, after operating the elevator 26 to lower the lower mold 22, the rotor core 2 is placed on the lower mold 22, and then the upper mold 21 is moved downward, thereby holding the rotor core 2 in the mold 20 (step S14). At this time, the upper mold 21 is adjusted to press the upper surface of the rotor core 2 with a predetermined pressure, whereby the upper mold 21 can be brought into close contact with the upper surface of the rotor core 2 and the lower mold 22 can be brought into close contact with the lower surface of the rotor core 2, respectively.

[0159] At an appropriate timing after the above step S11, the chamber outer peripheral heater 42 and the chamber inner peripheral heater 43 are operated to heat the ring-shaped resin member P (step S15). The heating in the chamber 30 is used to reduce the viscosity of the ring-shaped resin member P and make it a softened resin (hereinafter referred to as "softened resin") P3. The chamber outer peripheral heater 42 and the chamber inner peripheral heater 43 used for this heating are preferably controlled so that no local temperature difference occurs in the ring-shaped resin member P. By this heating, the ring-shaped resin member P melts, its viscosity decreases, and it can be changed into a highly fluid softened resin P3.

[0160] When the ring-shaped resin member P is changed into the softened resin P3, then, as Figure 11As shown, the softening resin P3 is filled into the filling space 6 in each groove portion 4 by raising the annular plunger 35 and pushing up the softening resin P3 (step S16). The softening resin P3 pushed up by the pressing surface 37 of the annular plunger 35 flows from the chamber 30 into each filling space 6 through the resin filling path 25. It should be noted that, in order to smoothly perform the filling of the softening resin P3 into the filling space 6 in step S16, for example, air holes (not shown) for discharging the air in the filling space 6 may be provided at appropriate positions on the upper mold 21.

[0161] When the filling of the softening resin P3 into the filling space 6 is completed, the mold heater 41 is operated to heat the softening resin P3 in the filling space 6 at a temperature higher than that in step S15, thereby curing the softening resin P3 (step S17). When curing the softening resin P3, it is preferable to heat the softening resin P3 within the temperature range where its viscosity will increase significantly for about several minutes by the mold heater 41. The softening resin P3 changes into the cured resin P4 due to this heating, and thus the permanent magnet 3 is fixed in the groove portion 4 of the rotor core 2 by resin molding. It should be noted that the heating time in this step S17 can be appropriately adjusted according to the type of the resin material used in the annular resin member P and the like.

[0162] When the above series of resin molding processes are completed, the upper mold 21 is raised, and the resin-molded rotor core 2 is output to the outside of the device using a conveying unit (not shown) such as a robot arm (step S18). The output rotor core 2 can be transferred to other devices, for example, for assembling a shaft or the like. Then, when the output of the rotor core 2 is completed, the manufacturing device 1 is cleaned (step S19). As Figure 12 shown, the cleaning of the manufacturing device 1 includes operating the elevator 26 to remove the cured resin P4 cured in the resin filling path 25. In addition, it may include cleaning the surface of the mold 20, the inside of the chamber 30, etc. using cleaning members such as brushes.

[0163] As described above, according to the method for manufacturing a motor core of the present embodiment, since both the chamber 30 and the annular resin member P input into the chamber 30 are annular, it is not easy to generate a temperature difference during the heating of the resin member in the chamber 30, and the heating can be performed uniformly. In addition, since the shape of the chamber 30 is consistent with the configuration of the filling space 6, the length of the resin filling path 25 connecting the two can be shortened, and the curing reaction of the resin in the resin filling path 25 can be suppressed.

[0164] It should be noted that, in the above-mentioned present embodiment, the resin filling path 25 is provided in the lower mold 22, and the softened resin P3 is filled from the bottom to the filling space 6, but the filling direction is not limited to this. For example, a solution in which a resin filling path is provided in the upper mold 21 instead of the lower mold 22 and the softened resin is filled from the top may be adopted, or a solution in which a resin filling path is provided in both the lower mold 22 and the upper mold 21 and the resin is filled from both the bottom and the top may be adopted.

[0165] <Modification>

[0166] In the above-mentioned resin molding device 100 and resin molding method, an example is given in which the ring-shaped resin part P is extruded from the jig 130 using the pressure device 150, and the ring-shaped resin part P is used as a single body in the motor core manufacturing device 1 and the motor core manufacturing method, but the present disclosure is not limited to this. Therefore, as a modified example of the above-mentioned one embodiment, the motor core manufacturing device 1A and the motor core manufacturing method using the input components 60 and 70 composed of the ring-shaped resin part P and other components instead of the ring-shaped resin part P alone are described below.

[0167] FIG. 13 is a schematic cross-sectional view showing an example of an input member that can be input into the chamber. Figure 13A As shown in FIG. 1 , the first input member 60 may be composed of an annular resin member P and a fixture for supporting the annular resin member P, more specifically, a fixture 130 as a component of the resin molding device 100 for accommodating the annular resin member P in an annular hole 131. In other words, the first input member 60 may be said to be in a state before the annular resin member P is squeezed out of the fixture 130 (see FIG. 1 ). Figure 3C ).

[0168] Figure 14 It means that you can invest Figure 13A A manufacturing device for a motor core according to a modified example of the input member shown in FIG. Figure 9 The motor core manufacturing device 1A of this modification may include the same configuration as the motor core manufacturing device 1 of the above-mentioned embodiment, except for the configuration of the cavity 30A portion. Therefore, the following description will focus on the configuration different from the above-mentioned motor core manufacturing device 1, and the same components as those of the motor core manufacturing device 1 are denoted by the same reference numerals and their description will be omitted.

[0169] like Figure 14As shown, the chamber 30A of the manufacturing apparatus 1A for the motor core of this modification example may be constituted by a cylindrical space whose outer diameter is adjusted to be larger than that of the chamber 30 of the manufacturing apparatus 1 for the motor core described above. Further, the size of the cylindrical chamber 30A can be adjusted to allow the above-described first input member 60 to be inserted therein.

[0170] Except that the first input member 60 is inserted into the chamber 30A instead of the annular resin member P, the process of manufacturing the motor core using the manufacturing apparatus 1A for the motor core of this modification example may be the same as the method of manufacturing the motor core of the above-described one embodiment.

[0171] According to the manufacturing apparatus 1A for the motor core and the method of manufacturing the motor core of this modification example, the step of extruding the annular resin member P outside the jig 130 (step S09) in the process of molding the annular resin member P can be omitted. Therefore, a series of manufacturing processes can be simplified.

[0172] On the other hand, among the input members 60 and 70 shown in FIG. 13, the second input member 70 is the same as the first input member 70 and includes an annular resin member P and a jig that houses the annular resin member P therein. More specifically, it is the jig 130 which is a component of the resin molding machine 100. Further, in addition to including the above two components, the second input member 70 may further include an extrusion ring whose tip is inserted from one end side of the annular hole portion 131 of the jig 130, that is, the extrusion ring 152 which is a part of the pressure device 150. In other words, the second input member 70 can be said to be a member in which the extrusion ring 152 is separated from the pressure device main body 151 and integrated in a state before the annular resin member P is extruded from the jig 130 (see Figure 3C ).

[0173] Figure 15 It shows the state corresponding to Figure 13B a manufacturing apparatus for a motor core which is another modification example of the input member shown and which can input Figure 9 Except for the configurations of the chamber 30B and the plunger 35A, the manufacturing apparatus 1B for the motor core of this modification example may include the same configurations as those of the manufacturing apparatus 1 for the motor core of the above-described one embodiment. Therefore, hereinafter, the description will focus on the configurations different from those of the manufacturing apparatus 1 for the motor core, and the same reference numerals will be given to the components identical to those of the manufacturing apparatus 1 for the motor core and their description will be omitted.

[0174] The chamber 30B of the manufacturing apparatus 1B for the motor core of this modification example is as Figure 15As shown, it can be constituted by a cylindrical space whose outer diameter is adjusted to be larger than the chamber 30 of the above-described manufacturing apparatus 1 for motor cores. Further, the cylindrical chamber 30B can be adjusted to a size that allows the above-described second input member 70 to be inserted therein. It should be noted that the second input member 70 inserted into the input chamber 30B is preferably inserted in such a manner that the extrusion ring 152 is positioned downward.

[0175] As Figure 15 shown, the length of the plunger 35A of the manufacturing apparatus 1B for motor cores of the present modification in the vertical direction is adjusted to be shorter than that of the annular plunger 35 of the manufacturing apparatus 1 for motor cores of the above-described one embodiment. This is because the plunger 35A of the manufacturing apparatus 1B for motor cores of the present modification operates in a manner of pushing up the extrusion ring 152 to fill the softened resin P3 softened in the chamber 30B into the filling space 6. In other words, in the present modification, it can be said that the functions of the annular plunger are achieved by the two members, the plunger 35A and the extrusion ring 152. In connection with this, the plunger 35A shown in the present modification only needs to be able to push up the extrusion ring 152 and may not be annular.

[0176] Except for the points that the second input member 70 is inserted into the chamber 30B instead of the annular resin member P and that the softened resin P3 is filled into the filling space 6 by pushing up the extrusion ring 152 by the plunger 35A, the process of manufacturing a motor core using the manufacturing apparatus 1B for motor cores of the present modification can be the same as the manufacturing method of the motor core of the above-described one embodiment.

[0177] According to the manufacturing apparatus 1B for motor cores and the manufacturing method of motor cores of the present modification, the process of extruding the annular resin member P outside the jig 130 (process S09) in the process of molding the annular resin member P can be omitted. In addition, since the extrusion ring 152 functions as a part of the plunger, it is not necessary to previously change the shape of the plunger in accordance with the jig 130.

[0178] It should be noted that in the manufacturing apparatuses 1A and 1B for motor cores of the above-described respective modifications, since the jig 130 is disposed at a position corresponding to the through-hole H of the annular resin member P, it is difficult to dispose the inner peripheral heater 43 of the chamber in terms of structure. However, in the manufacturing apparatus for motor cores of the present disclosure, since the annular resin member P is used as the resin member, uneven heating is effectively suppressed. In addition, if the central portion of the jig 130 is formed in a cylindrical shape instead of the cylindrical shape as shown in FIG. 13 or the like, the inner peripheral heater 43 of the chamber can also be disposed by inserting it into the inside of the cylinder. When the central portion of the jig 130 is formed in such a cylindrical shape, the handling of the input member also becomes easy.

[0179] In the manufacturing apparatus and method of the motor core according to the above-described embodiment and each modification, as the annular resin member, the case where both the inner peripheral surface and the outer peripheral surface are circular is exemplified. However, the present disclosure is not limited thereto. Specifically, the shapes of the inner peripheral surface and the outer peripheral surface may be changed in accordance with the configuration of the filling space 6 of the rotor core 2. In connection therewith, hereinafter, a further modification of the first input member 60 exemplified as one modification will be described.

[0180] FIG. 16 is an explanatory diagram for explaining a modification of the first input member, Figure 16A which is a top view showing an example of the rotor core, Figure 16B and is a top view of a third input member 60A including an annular resin member P for the rotor core shown in Figure 16A . As shown in Figure 16B , the third input member 60A of this modification is the same as the first input member 60 in that it is composed of an annular resin member PA, a jig that houses the annular resin member PA therein, and more specifically, a jig 130A that can function as a component of the resin molding machine 100. However, in the jig 130A of the third input member 60A, a plurality of inner ridges 136 and outer ridges 137 that protrude in a direction crossing the conveying direction and extend along the conveying direction are formed on the inner and outer inner wall surfaces of the annular hole portion 131A thereof. As shown in Figure 16B , it is preferable that both side surfaces of the plurality of inner ridges 136 and outer ridges 137 are formed by curved surfaces. And the annular resin member PA included in the third input member 60A is formed with a plurality of necks in the circumferential direction.

[0181] The third input member 60A is preferably used for resin filling into the rotor core 2A that is annularly provided with six groove portions 4A as shown in Figure 16A . Here, as shown in Figure 16B , the circumferential positions of the inner ridges 136 and the outer ridges 137 formed on the jig 130A are preferably adjusted to be located at the positions of the rotor core 2A where the resin filling portions, i.e., the groove portions 4, are not provided. If the inner ridges 136 and the outer ridges 137 are arranged in this way, the amount of resin cured in the jig 130A can be reduced. Therefore, the flow path of the softened resin P3 becomes shorter, and more resin can be filled into the groove portion 4. It should be noted that in the above example, the case where both the inner ridges 136 and the outer ridges 137 are provided on the jig 130A is exemplified, but it may be only either one.

[0182] In addition, although not shown in the drawings, ridges similar to the inner ridge 136 and the outer ridge 137, which are exemplified as the third input member 60A, may be formed on the inner inner wall surface and the outer inner wall surface of the chamber. In this case, the amount of resin cured in the chamber can be reduced. Therefore, the flow path of the softened resin P3 becomes shorter, and more resin can be filled into the groove portion 4.

[0183] Figure 17 represents Figure 6 a diagram showing a state corresponding to that of the manufacturing apparatus for a motor core, which is another modified example of the manufacturing apparatus for a motor core shown in Figure 9 . In addition, Figure 18 is a diagram showing the state after the lower die of the manufacturing apparatus for a motor core shown in Figure 17 is lowered. As shown in Figure 17 and Figure 18 , the manufacturing apparatus 1C for a motor core of this modified example includes a guide member 80 at the central portion of the chamber 30 that can temporarily position the inner peripheral surface of the annular resin member P input into the chamber 30. It should be noted that the manufacturing apparatus 1C for a motor core of the present embodiment has the same configuration as the above-described manufacturing apparatus 1 for a motor core, except that it includes the guide member 80.

[0184] One end of the guide member 80 is supported at the center of the base of the annular plunger 35, and it may be composed of a spiral spring 82 extending in the upward direction and a block 81 that is fitted to the other end of the spiral spring 72 and closes the central portion of the chamber 30. It should be noted that the spiral spring 82 may be changed to a biasing unit having the same function.

[0185] The block 81 may be composed of a cylindrical member having a diameter substantially equal to that of the protruding portion 22A of the lower die 22. In addition, as shown in Figure 17 , the block 81 is arranged so that when the lower die 22 rises, it is pushed upward by the biasing force of the spiral spring 82 to close the central portion of the chamber 30. At this time, it is preferable that the upper surface of the block 81 is arranged at a position higher than the pressing surface 37 of the annular plunger 35. When the annular resin member P is input into the chamber 30 whose central portion is closed by the block 81, the annular resin member P is arranged in the chamber 30 in a state where the position of its inner peripheral surface is positioned by the block 81.

[0186] After the input of the annular resin member P into the chamber 30 is completed and the lower die 22 is lowered, the block 81 is pressed by the protruding portion 22A of the lower die 22 and descends against the biasing force of the spiral spring 82. At this time, since the diameter of the block 81 and the diameter of the protruding portion 22A are adjusted to be substantially equal as described above, the insertion operation of the protruding portion 22A into the inner peripheral side of the annular resin member P can be smoothly performed. When the lowering of the lower die 22 is completed, as shown in Figure 18As shown, the upper surface of the block 81 is preferably configured to move downward toward the pressing surface 37.

[0187] By providing the above-described guide member 80, in the manufacturing apparatus 1C of the motor core of this modification, when the lower die 22 descends, the protruding portion 22A does not contact the annular resin member P, and the descending operation of the lower die 22 can be smoothly performed without breaking the annular resin member P. It should be noted that chamfering or rounding is preferably performed on the outer periphery of the upper surface of the block 81 to facilitate the insertion of the annular resin member P.

[0188] In addition, in the resin former 100 of the above-described one embodiment, a case where the jig 130 having an annular hole portion 131 capable of accommodating the annular resin member P is used is exemplified, but the resin former of the present disclosure is not limited thereto. Therefore, hereinafter, mainly with reference to Figures 19 to 21 the resin former 100A and the resin forming method of the modification of this embodiment will be described.

[0189] Figure 19 is a schematic explanatory view showing an example of a resin former which is a modification of one embodiment of the present disclosure. The resin former 100A of this modification is the same as the resin former 100 of the above-described one embodiment and can form an annular resin member P. As Figure 19 shown, this resin former 100A mainly includes an extruder 101A, a jig 130A, and a cutter 140A.

[0190] The extruder 101A further includes a moving device 126 that moves the screw main body 121 in the conveying direction. Except for this point, it may have the same configuration as the extruder 101 of the above-described one embodiment. Therefore, the same reference numerals are given to the parts of the extruder 101A that are the same as those of the extruder 101, and the description thereof is omitted, and only the parts different from the extruder 101 will be described.

[0191] The moving device 126 may be constituted by an actuator that can slidably move the screw main body 121 in the extending direction of the sleeve 110. When the moving device 126 is operated, the tip portion of the screw main body 121, that is, the closing block 123 portion, can protrude from the outlet 112 of the sleeve 110 to the outside. Here, the length of the closing block 123 in the conveying direction is preferably adjusted to be the same as or greater than the axial length of the formed annular resin member P.

[0192] The jig 130A receives the formed annular resin part P. The jig 130A of this modification example can be composed of a flat plate-like member. In addition, it can be that the jig 130A of this modification example can selectively block the outlet 112 by abutting against the downstream end of the conveying direction of the sleeve 110. In association with this, in order to selectively block the outlet 112, the jig 130A can move in a direction approaching the outlet 112 and a direction away from the outlet 112. The jig 130A of this modification example can move in the vertical direction. It should be noted that in this modification example, an example is shown in which the jig 130A not only receives the annular resin part P but also has the function of blocking the outlet 112, but the outlet 112 can also be blocked by other members such as a known baffle (not shown).

[0193] The cutter 140A can be arranged at a position close to the outlet 112 and cut the resin kneaded body P2 output from the outlet 112 to the outside of the sleeve 110 together with the screw body 121 at a position close to the outlet 112. The cutter 140A of this modification example is arranged so as to surround the periphery of the outlet 112 and can move in a direction crossing the conveying direction, for example, the horizontal direction.

[0194] Figures 20A to 20C It shows Figure 19 An operation explanatory diagram which is an example of the operation state of the resin molding machine shown. In addition, Figure 21 It is a flowchart showing an example of a resin molding method according to an embodiment of the present disclosure. Next, mainly with reference to FIG. 20 and Figure 21 , the resin molding method of this modification example will be described. It should be noted that hereinafter, an example of implementing the resin molding method of this modification example using the above resin molding machine 100A will be described exemplarily.

[0195] The resin molding method of the present embodiment at least includes: a step of starting to supply the powdery resin composition P1 into the sleeve 110 from the upstream side in the conveying direction (corresponding to the subsequent step S23); a step of rotating the screw 120 extending along the conveying direction in the sleeve 110 to knead and convey the powdery resin composition P1; a step of heating the inside of the sleeve 110 to melt at least a part of the powdery resin composition P1 conveyed in the sleeve 110 to generate a resin kneaded body P2 (corresponding to the subsequent step S21); a step of closing the outlet 112 provided on the downstream side in the conveying direction of the sleeve 110 (corresponding to the subsequent step S24); when a predetermined amount of the resin kneaded body P2 is supplied to the annular space defined between the tip of the screw 120 and the sleeve 110 (corresponding to the subsequent step S26), opening the outlet 112 and moving the screw 120 to output its tip portion and the resin kneaded body P2 around it from the outlet 112 to the outside of the sleeve 110 (corresponding to the subsequent steps S27 and S28); a step of cutting the resin kneaded body P2 output from the outlet 112 to the outside of the sleeve 110 together with the screw 120 at a position close to the outlet to mold a ring-shaped resin part P (corresponding to the subsequent step S29). The following will be described in detail.

[0196] The resin molding method of this modification will be described in more detail. First, the sleeve heater 115 is operated to start heating the inside of the sleeve 110 (step S21). Next, the motor 125 is operated to start the rotation of the screw 120 (step S22), and at the same time, the resin composition supply source 114 is operated to start supplying the powdery resin composition P1 to the supply port 111 of the sleeve 110 (step S23). By the rotation of the screw 120 and the heat from the sleeve heater 115, the powdery resin composition P1 supplied to the supply port 111 is conveyed and kneaded, and at least a part of it is melted to generate a resin kneaded body P2.

[0197] In addition, the outlet 112 of the sleeve 110 is closed by operating the clamp 130A (step S24). When the resin kneaded body P2 is conveyed in the state where the outlet 112 is closed, as Figure 20A shown, the conveyance of the resin kneaded body P2 is restricted by the clamp 130A, and thus it stays in the annular space defined between the sleeve 110 and the screw body 121, that is, around the blocking block 123. In a state where a certain amount of the resin kneaded body P2 stays around the blocking block 123, if new resin kneaded body P2 is continuously conveyed, the resin kneaded body P2 located around the blocking block 123 is compressed and compression-molded into a circular ring shape matching the shape of the space between the sleeve 110 and the blocking block 123 (step S25). It should be noted that the order of performing the above steps S21 to S24 is not limited to the above content and can be appropriately changed.

[0198] Next, when the amount of the resin kneaded body P2 supplied to the periphery of the closing block 123 reaches a specified supply amount (Yes in step S26), a series of steps for separating and molding the annular resin part P from the resin kneaded body P2 are started. Specifically, first, the clamp 130A is actuated to open the outlet 112 of the sleeve 110 (step S27). It should be noted that a part of the resin kneaded body P2 in the sleeve 110 at this time is supported by the fins 122 or the like, whereby the state of being held around the screw body 121 is maintained.

[0199] Next, the moving device 126 is actuated to cause the tip of the screw body 121 to project outside the outlet 112. Specifically, as Figure 20B shown, the moving device 126 is actuated so that the closing block 123 portion of the screw body 121 and the resin kneaded body P2 held around the closing block 123 are moved in a manner of being output from the outlet 112 to the outside of the sleeve 110 (step S28).

[0200] Next, as Figure 20C shown, the cutter 140A disposed at a position close to the outlet 112 is actuated to cut the resin kneaded body P2 output to the outside of the outlet 112 together with the closing block 123 through the above steps (step S29). It should be noted that in this modified example, the conveyance direction length of the closing block 123 is adjusted in accordance with the axial length of the annular resin part P to be molded, and thus the cutting position of the cutter 140A is substantially located at the same position as the end of the outlet 112. However, if the cutting position of the cutter 140A is adjusted, the axial length of the annular resin part P can also be adjusted.

[0201] The resin kneaded body P2 cut by the cutter 140A is separated from the resin kneaded body P2 held around the screw body 121 and is output as the annular resin part P. The output annular resin part P can be received by the clamp 130A. Through the above steps, the molding of the annular resin part P is completed. It should be noted that the annular resin part P on the clamp 130A can be conveyed to a manufacturing device for a motor core or the like.

[0202] As described above, in the resin molding device 100A and the resin molding method of this modified example, the same effects as those of the resin molding device 100 and the resin molding method of the above-described present embodiment can also be achieved. In addition, since the degree of freedom of the structure of the clamp 130A is high, the processing of the molded annular resin part P is easy.

[0203] In addition, the resin former 100A and the resin forming method of the present modification example can also function as part of a manufacturing apparatus for a motor core and a manufacturing method for a motor core. It should be noted that, except for the part corresponding to the resin former 100A, the configuration of the manufacturing apparatus for the motor core in this case can be the same as the manufacturing apparatuses 1, 1A to 1C for the motor core exemplified above as an embodiment or a modification example. In addition, except for the above-described resin forming process, the processes of the manufacturing method for the motor core in this case can also be the same as the manufacturing method for the motor core exemplified above as an embodiment or a modification example. Therefore, detailed description of the manufacturing apparatus for the motor core and the manufacturing method for the motor core including the resin former 100A and the resin forming method of the present modification example is omitted here.

[0204] The present disclosure is not limited to the above-described embodiments, and various modifications can be made and implemented without departing from the gist of the present disclosure. And all these modifications are included in the technical idea of the present disclosure. In addition, in the present disclosure, as long as there is no contradiction, each component may exist only one or two or more.

[0205] Regarding all the documents including publications, patent applications, and patents cited in this specification, each document is specifically shown, referred to, and incorporated herein, and in addition, the entire content of each document is incorporated herein to the same extent as the content described herein.

[0206] Regarding the use of nouns and the same indicative terms used in connection with the description of the present disclosure (particularly in connection with the following claims), as long as there is no special indication in this specification or no obvious contradiction with the context, they are interpreted as covering both the singular and the plural. Regarding the terms "comprising", "having", "including", and "containing", as long as there is no special description, they are interpreted as open terms (i.e., meaning "including but not limited to..."). Regarding the specific description of the numerical range in this specification, as long as there is no special indication in this specification, it is only intended to serve as a shorthand notation for individually referring to each value falling within the range, and each value is incorporated into the specification as if it were individually listed in this specification. Regarding all the methods described in this specification, as long as there is no special indication in this specification or no obvious contradiction with the context, they can be carried out in any appropriate order. Regarding all the examples or exemplary phrases (such as "etc.") used in this specification, as long as there is no special claim, they are only intended to better explain the present disclosure and do not set a limitation on the scope of the present disclosure. No phrase in the specification should be construed as indicating an element not recited in the claims as essential to the practice of the present disclosure.

[0207] In this specification, preferred embodiments of the present disclosure are described, including the best mode known to the inventors for carrying out the present disclosure. For those skilled in the art, upon reading the above description, variations of these preferred embodiments should be obvious. The inventors expect skilled persons to appropriately apply such variations, and anticipate that the present disclosure will be implemented in ways other than those specifically described in this specification. Accordingly, to the extent permitted by applicable law, the present disclosure includes all modifications and equivalents of the content recited in the claims appended to this specification. Moreover, any combination of the above elements in all variations is included in the present disclosure as long as it is not specifically stated in this specification or is not clearly inconsistent with the context.

Claims

1. A resin former, comprising: An extrusion conveying path capable of conveying a powdery resin composition containing a thermosetting resin supplied to the upstream side in the conveying direction along the conveying direction; The screw has a screw body and fins, where The screw body extends along the conveying direction in the extrusion conveying path at a prescribed interval from the inner wall surface of the extrusion conveying path, and the fins are formed on the outer peripheral surface of the screw body; A former-side heating machine capable of heating the powdery resin composition conveyed in the extrusion conveying path; A rotating device that rotates the screw to knead the powdery resin composition and convey it along the conveying direction, thereby generating a resin kneaded body; And A jig that receives an annular resin piece composed of the resin kneaded body output from the output port provided on the downstream side in the conveying direction of the extrusion conveying path.

2. The resin former according to claim 1, further comprising: A cutting device capable of cutting the resin kneaded body output from the output port of the extrusion conveying path.

3. The resin former according to claim 1, wherein The jig has an annular hole portion capable of being connected to the output port.

4. The resin former according to claim 3, further comprising: A lid capable of closing the downstream end in the conveying direction of the annular hole portion.

5. The resin former according to claim 3, further comprising: A pressure device capable of pressurizing the annular resin piece accommodated in the annular hole portion from one end side of the annular hole portion.

6. The resin former according to claim 3, wherein On at least one of the inner and outer inner wall surfaces of the annular hole portion, a plurality of ridges extending along the conveying direction and bulging in a direction crossing the conveying direction are formed.

7. The resin former according to claim 1, wherein It further comprises a diameter-changing jig, and the diameter-changing jig includes: a circular first opening portion capable of communicating with the output port of the extrusion conveying path; a circular second opening portion, at least one of the outer diameter and the inner diameter of which is different from that of the first opening portion; and a communication path connecting the first opening portion and the second opening portion.

8. The resin former according to claim 1, wherein The tip portion of the screw body is constituted by a closing block without fins, The resin former further comprises a moving device for moving the screw body along the conveying direction.

9. A manufacturing device for a motor core, comprising: A resin former capable of forming an annular resin piece; A mold capable of holding a motor core including a plurality of resin filling portions arranged in a ring at a prescribed interval; An annular chamber communicating with a resin filling path formed in the mold and having ends respectively communicating with the plurality of resin filling portions, and capable of accommodating the annular resin piece therein; A plunger capable of moving in the annular chamber; and A manufacturing-device-side heating machine disposed outside the mold and around the annular chamber, The resin former includes: An extrusion conveying path capable of conveying a powdery resin composition containing a thermosetting resin supplied to the upstream side in the conveying direction along the conveying direction; A screw, comprising a screw body and fins, wherein the screw body extends along the conveying direction in the extrusion conveying path with a predetermined interval from the inner wall surface of the extrusion conveying path, and the fins are formed on the outer peripheral surface of the screw body; A former side heater, capable of heating the powdery resin composition conveyed in the extrusion conveying path; A rotating device, which rotates the screw to knead and convey the powdery resin composition along the conveying direction, thereby generating a resin kneaded body; and A jig, which receives an annular resin member composed of the resin kneaded body output from an output port provided on the downstream side in the conveying direction of the extrusion conveying path.

10. The manufacturing apparatus for a motor core according to claim 9, wherein The annular chamber can accommodate the annular resin member and the jig for supporting the annular resin member.

11. The manufacturing apparatus for a motor core according to claim 9, wherein The jig is provided with an annular hole portion capable of being connected to the output port, The annular chamber can accommodate the annular resin member, the jig in which the annular resin member is accommodated in the annular hole portion, and at least a part of an extrusion ring whose tip is inserted from one end side of the annular hole portion of the jig, The extrusion ring functions as a part of the plunger.

12. The manufacturing apparatus for a motor core according to claim 9, wherein On at least one of the inner side inner wall surface and the outer side inner wall surface of the annular chamber, a plurality of ridges extending along the conveying direction and bulging in a direction crossing the conveying direction are formed at positions where the resin filling portion is not provided for the motor core disposed in the mold.

13. A resin molding method, comprising the following steps: Start supplying a powdery resin composition containing a thermosetting resin into the extrusion conveying path from the upstream side in the conveying direction; Rotate a screw extending along the conveying direction in the extrusion conveying path to knead and convey the powdery resin composition; Heat the inside of the extrusion conveying path to melt at least a part of the powdery resin composition conveyed in the extrusion conveying path to generate a resin kneaded body; Connect one end of the annular hole portion of a jig having an annular hole portion to an output port provided on the downstream side in the conveying direction of the extrusion conveying path; Supply the resin kneaded body from the output port into the annular hole portion; and When a predetermined amount of the resin kneaded body is supplied into the annular hole portion, cut off the resin kneaded body between the output port of the extrusion conveying path and the annular hole portion to mold an annular resin member.

14. The resin molding method according to claim 13, further comprising the following step: Press and compress the annular resin member in the annular hole portion in the direction along the conveying direction.

15. The resin molding method according to claim 13, further comprising the following step: Press and extrude the annular resin member in the annular hole portion in the direction along the conveying direction to the outside of the jig.

16. A resin molding method, comprising the following steps: Start supplying a powdery resin composition containing a thermosetting resin into the extrusion conveying path from the upstream side in the conveying direction; Rotate a screw extending along the conveying direction in the extrusion conveying path to knead and convey the powdery resin composition; Heat the inside of the extrusion conveying path so that at least a part of the powdery resin composition conveyed in the extrusion conveying path melts to generate a resin kneaded body; Close the outlet provided on the downstream side in the conveying direction of the extrusion conveying path; When a predetermined amount of the resin kneaded body is supplied to an annular space defined between the tip of the screw and the extrusion conveying path, open the outlet, and move the screw in such a manner that its tip and the resin kneaded body around it are output from the outlet to the outside of the extrusion conveying path; and Cut the resin kneaded body output from the outlet to the outside of the extrusion conveying path together with the screw at a position close to the outlet to form an annular resin part.

17. A method for manufacturing a motor core, comprising the following steps: Start supplying a powdery resin composition containing a thermosetting resin into the extrusion conveying path from the upstream side in the conveying direction; Rotate a screw extending along the conveying direction in the extrusion conveying path to knead and convey the powdery resin composition; Heat the inside of the extrusion conveying path so that at least a part of the powdery resin composition conveyed in the extrusion conveying path melts to generate a resin kneaded body; Connect one end of the annular hole portion of a jig having an annular hole portion to the outlet provided on the downstream side in the conveying direction of the extrusion conveying path; Supply the resin kneaded body from the outlet into the annular hole portion; When a predetermined amount of the resin kneaded body is supplied into the annular hole portion, cut the resin kneaded body between the outlet of the extrusion conveying path and the annular hole portion to form an annular resin part; Put the formed annular resin part into an annular chamber; In a mold having a resin filling path communicating with the annular chamber, hold a motor core including a plurality of resin filling portions arranged in a ring shape at a predetermined interval so that the end of the resin filling path communicates with the plurality of resin filling portions; Heat the annular resin part in the annular chamber to soften it; Actuate a plunger capable of moving in the annular chamber, thereby filling the softened resin composed of the softened annular resin part in the annular chamber into the plurality of resin filling portions; and Cure the softened resin filled in the plurality of resin filling portions.

18. The method for manufacturing a motor core according to claim 17, wherein The step of putting the formed annular resin part into the annular chamber includes the following steps: putting the annular resin part and the jig having the annular resin part accommodated therein into the annular chamber.

19. The method for manufacturing a motor core according to claim 17, wherein The process of putting the formed annular resin part into the annular chamber includes the following steps: putting the annular resin part, a fixture that internally houses the annular resin part, and an extrusion ring whose tip is inserted from one end side of the annular hole of the fixture. The extrusion ring operates to fill the softened resin into the plurality of resin filling parts as a part of the plunger.

20. A method for manufacturing a motor core, comprising the following steps: Start supplying a powdery resin composition containing a thermosetting resin into the extrusion conveying path from the upstream side in the conveying direction. Rotate a screw extending along the conveying direction in the extrusion conveying path to knead and convey the powdery resin composition. Heat the inside of the extrusion conveying path to melt at least a part of the powdery resin composition conveyed in the extrusion conveying path to generate a resin kneaded body. Close the outlet provided on the downstream side in the conveying direction of the extrusion conveying path. When a predetermined amount of the resin kneaded body is supplied to an annular space defined between the tip of the screw and the extrusion conveying path, open the outlet, and move the screw so that its tip and the resin kneaded body around it are output from the outlet to the outside of the extrusion conveying path. Cut the resin kneaded body output from the outlet to the outside of the extrusion conveying path together with the screw at a position close to the outlet to form an annular resin part. Put the formed annular resin part into the annular chamber. In a mold having a resin filling path communicating with the annular chamber, hold a motor core including a plurality of resin filling parts arranged in a ring shape at a predetermined interval so that the end of the resin filling path communicates with the plurality of resin filling parts. Heat the annular resin part in the annular chamber to soften it. Operate a plunger capable of moving in the annular chamber to fill the softened resin formed by the softened annular resin part in the annular chamber into the plurality of resin filling parts. And Cure the softened resin filled in the plurality of resin filling parts.

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