JP2009148060A - Method of manufacturing mold coil, mold apparatus for mold coil and mold coil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mold coil which is easily worked and has high space factor and high heat dissipation. <P>SOLUTION: A manufacturing method includes a coil positioning process for positioning a coil 1a in a mold 30 while a prescribed gap is made between adjacent wirings in a coil axis direction, a mold resin implanting process for implanting mold resin in the mold where the coil is positioned, a coil shaping process for compressing the coil in an axial direction and bringing winding close to the coil axis direction just after the mold resin implanting process or in the middle of the mold resin implanting process and a mold releasing process for taking out a coil compact molded by mold resin from the mold. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a molded coil manufacturing method and a molded coil. Specifically, the present invention relates to a method for manufacturing a molded coil that can improve the space factor and improve heat dissipation.

  For example, in a hybrid vehicle or an electric vehicle, an electric motor is used for driving. This drive motor is required not only to have high output and high efficiency, but also to be reduced in size and weight. For this reason, various improvements and developments have been made.

  In an electric motor, a coil is formed by winding a winding made of a conductor around a core of a stator made of a magnetic material. However, in order to realize a smaller size at a high output, the space factor of the winding is used. Is required to be improved to the limit. Further, in order to obtain a large output by increasing the magnetic force, it is necessary to flow a large current through the winding. In order to increase the space factor and allow a large current to flow, an edgewise coil configured by winding a rectangular winding having a rectangular cross section with its short side directed in the axial direction of the coil is often employed. . On the other hand, a molded coil in which a coil is resin-molded is often employed in order to reduce the size and weight and improve the economic efficiency in the manufacturing process. By adopting the edgewise coil or the molded coil for the electric motor, it is possible to configure the annular stator only by inserting the coil into the teeth portion of the stator that is annularly arranged.

  However, the edgewise coil has a wide conductor width because the winding cross section is rectangular, and a large eddy current tends to be generated because the short side is wound toward the axis of the coil. For this reason, there is a problem that the loss is large. In addition, when forming a coil, there is also a problem that bending is difficult because the conductor width in the bending direction is wide. In order to avoid the inconvenience of the edgewise coil, a plurality of copper wires having a small conductor width are electrically wound, and these are connected in parallel to reduce eddy currents and can be easily processed. Coils have been proposed.

JP 2007-195333 A 6-29117

  The coil described in Patent Document 2 is configured by winding a plurality of parallel lines in which thin conductors covered with an insulating layer are joined in parallel in one plane in the width direction.

  While the coil described in Patent Document 2 can be easily bent, it has a low shape retaining property and is easily deformed. Therefore, care must be taken when assembling the stator or the like.

  In addition, since a large number of windings are stacked and wound, gaps are easily generated between the windings. Therefore, it is conceivable that the space factor decreases and the heat dissipation decreases.

  Usually, shape retention is improved by resin-molding the coil, but it is difficult to fill the mold resin with no gap between the windings. In particular, in order to increase the thermal conductivity of the mold resin, powder such as alumina filler is often added, so that the fluidity of the resin tends to be lowered. For this reason, in the case of a coil in which a plurality of windings are arranged in the radial direction, it is very difficult to fill the gap between the inner windings with mold resin, and not only the space factor decreases. Also, there is a problem that an air layer is generated inside the coil and heat dissipation is reduced.

  The present invention has been devised to solve the above problems, and an object thereof is to provide a molded coil that is easy to process and has a high space factor and high heat dissipation.

  The present invention relates to a coil positioning step for positioning a coil in a mold with a predetermined gap between windings adjacent to each other in the coil axis direction, and a mold for injecting mold resin into the mold in which the coil is positioned. A resin injection step, a coil shaping step that compresses the coil at least in the axial direction immediately after the mold resin injection step or in the middle of the mold resin injection step, and brings the winding close to the coil axial direction, and the mold resin And a mold release step for removing the molded coil molded body from the mold.

  The type and purpose of the coil to which the present invention can be applied are not particularly limited. It can be applied not only to electric motors but also to coils used in various devices such as transformers. Further, the coil form is not particularly limited as long as it can be molded. The present invention can be applied not only to a cylindrical coil but also to various types of coils such as a truncated cone.

  In the present invention, the coil is positioned in a state where a predetermined gap is opened between the windings. That is, the coil is positioned in a state of being expanded in the axial direction. The said clearance gap can be set according to the dimension shape of a coil, and the fluidity | liquidity of the mold resin to employ | adopt. For example, the gap can be set to 0.3 to 1 mm.

  After positioning in the mold with the gap opened, a mold resin as a molding material is injected into the mold. Various resin materials can be adopted as the mold resin. For example, it is preferable to employ a heat-resistant mold resin such as a liquid crystal polymer resin, a polyphenylene sulfide resin, or an epoxy resin. Moreover, in order to improve heat dissipation, the said resin is mixed with a thermally conductive filler, such as alumina powder.

  The molding method is not particularly limited. For example, general injection molding can be used. Moreover, it can shape | mold using the metal mold | die for compression molding utilized for shaping | molding of thermosetting resin etc. In the injection molding method using a thermoplastic resin, it is preferable to employ a mold device having a heating device for enhancing the fluidity of the resin.

  By filling the resin with a gap between the windings of the coil, the resin can be spread over the gap. On the other hand, if it hardens | cures as it is, a space factor will fall. In the present invention, the coil shaping step is performed before the mold resin is cured, that is, immediately after the mold resin injection step or in the middle of the forming material injection step.

  The coil shaping step is performed by compressing the coil at least in the axial direction and bringing the windings expanded in the coil positioning step closer. That is, the coil shaping process is performed by pressing the mold resin filled between the windings so that the windings are compressed and approached.

  The form of the coil shaping process is not particularly limited. For example, it can be performed by displacing the mold surface located in the axial direction of the coil toward the coil axis. Further, as in the invention described in claim 3, the coil shaping step can be performed by a pressing member that extends from the inner periphery of the mold into the mold and acts on a predetermined position of the winding. . For example, the coil shaping step can be performed by holding a pin as a pressing member on the inner surface of the mold so that the pin can be projected and retracted and causing the pin to act on a predetermined portion of the coil.

  The form of the pressing member is not particularly limited as long as the pressing member is brought into contact with at least a part of the coil winding and can hold or position the winding in a predetermined position. In addition, the said press member can be provided in a metal mold | die so that it can protrude and protrude using a various method. For example, it can be made to appear and disappear by hydraulic pressure, pneumatic pressure, spring force, or the like.

  The invention described in claim 2 of the present application performs the coil shaping step by positioning each winding at a predetermined mold position by applying a force in a direction perpendicular to the coil axis.

  When the shape retaining property of the winding is low, in the coil positioning step, the winding row in the coil radial direction may be disturbed, or a part of the winding may be displaced by the flow pressure when filling with mold resin. Further, when a pressing force is applied in the axial direction of the coil, it is also conceivable that the resin whose hardness has increased in the mold flows in the lateral direction, whereby the winding is displaced in the direction perpendicular to the axis. In particular, when a truncated cone-shaped or truncated pyramid-shaped coil is adopted, the coil shaping step is performed, and each winding is accurately positioned at a position perpendicular to the axis so that the winding is accurately positioned at a predetermined position of the molded body. It becomes possible to mold.

  In particular, as in the invention described in claim 4, when a coil formed by winding a plurality of windings in a state of being laminated in the radial direction is adopted, the windings themselves are easily deformed. Therefore, by positioning in the coil radial direction, it becomes possible to resin-mold the coil with high accuracy by suppressing the displacement of the winding, and it is possible to form a molded coil with high space factor and high heat dissipation.

  Since both terminal portions of the coil need to be electrically connected, it is necessary to extend or expose the coil both terminal portions from the mold. Various methods can be employed as a method of extending or exposing. For example, it is possible to adopt a method of holding a cap or the like that is held between mold members in a mold or removed after molding so as not to touch the filling resin.

  Further, as in the invention described in claim 5, the mold resin injection step and the coil shaping step can be performed by positioning the two terminal portions of the coil in the die while being exposed from the die. Since the coil terminal portion is to be electrically connected later, it is desirable to perform each step in a state of being isolated from the mold resin.

  The method for exposing the coil terminal portion from the mold is not particularly limited. For example, a parting line of a mold can be provided in the vicinity of the terminal part so that the terminal part can be exposed, and a groove or the like that does not leak the injection mold resin in the molding space can be provided.

  The invention described in claim 6 is a coil molding die apparatus for resin molding of a coil, and includes shaping means for shaping the winding immediately after the molding resin injection or in the middle of the molding resin injection process.

  The shaping means is not particularly limited. For example, it can be configured by providing a device for displacing a part of the mold immediately after the molding resin injection process or simultaneously with the molding resin injection process. Further, it is possible to provide a pressing means that appears and disappears in the mold.

  The form and mechanism of the shaping means are not particularly limited. For example, as in the invention described in claim 7, the shaping means can be configured to include an axial direction pressing means for pressing the winding in the coil axial direction. Further, as in the invention described in claim 8, the shaping means includes a radial pressing means for pressing or holding the windings in a direction perpendicular to the coil axis and positioning each winding at a predetermined position. Can do.

  The configuration of the pressing means is not particularly limited, and for example, as in the invention described in claim 9, it can be configured by providing a pressing member that can be retracted and held inside the mold.

  The invention described in claim 10 is a coil molded with resin, and the coil includes a plurality of windings wound in a stacked state in a radial direction of the coil, and the windings are in proximity to each other. And is filled with resin between these windings.

  Many conventional mold coils are formed by winding a single winding, and filling resin between the windings has not been a problem. On the other hand, in a coil configured by winding or combining a plurality of windings, it is difficult to fill a mold resin between the windings inside the coil, and the thermal conductivity of the coil cannot be improved. It was. In particular, in a coil used for a stator or the like for passing a large current for an electric motor, high heat dissipation is required, and it is difficult to employ a molded coil in which a plurality of thin windings are combined. In the present invention, the above manufacturing method makes it possible to fill the resin between the windings inside the coil, and it is possible to configure a coil with unprecedented performance.

  In the present invention, a force is applied to the winding of the coil by the shaping means immediately after the molding resin filling process or during the molding resin filling process. The shaping means is configured to extend into a molding space into which resin is injected and press a predetermined part of the winding. For this reason, as in the invention described in claim 11, a shaping recess is formed from the outer peripheral coating layer surface to the surface of a predetermined portion of the coil molded inside.

  The shaping recess is formed as a result of shaping the coil, and the winding position of the coil can be visually confirmed from the recess. As a result, it is possible to easily determine the state of the coil inside the resin mold, and it is possible to improve the reliability of the product by discriminating a coil with poor shaping or the like.

  According to the present invention, it is possible to provide a molded coil which can be easily bent and has a high space factor and high heat dissipation.

  Embodiments of the present invention will be specifically described below with reference to the drawings.

  FIG. 1 is an overall perspective view showing an example of a molded coil according to the present invention. FIG. 2 is an overall perspective view of the coil 1a molded in resin. In the present embodiment, the present invention is applied to a split stator coil of an electric motor.

  The molded coil 1 according to the present embodiment is formed in a truncated pyramid shape having a through hole 12 into which a tooth portion of a core (not shown) is inserted inside. The terminal portions 21 and 22 of the coil 1a are exposed and extended from the upper edge portion and the lower edge portion on one coil end side of the molded coil 1.

  FIG. 2 shows an overall perspective view of the coil 1a. The coil 1a according to this embodiment includes four substantially rectangular cylindrical coil members 6, 7, 8, and 9 formed by winding rectangular windings 2, 3, 4, and 5, respectively. It is assembled and formed. As the windings 2, 3, 4 and 5, copper wires having a substantially rectangular cross section are employed as shown in FIG. 3, and each winding is provided with an insulation coating (not shown).

  In the present embodiment, the tapered coil side-side inner peripheral surfaces of the stacked cylindrical coil members 6, 7, 8, 9 are brought into contact with the outer peripheral surface of the cylindrical coil member inserted therein. And assembled. Moreover, in the present embodiment, each of the cylindrical coil members 6, 7, 8, and 9 is formed in a rectangular cylindrical shape as a whole. For this reason, each cylindrical coil member 6,7,8,9 can be positioned with high precision, and can be assembled | attached easily.

  Moreover, the said coil 1a applies this application to the coil of the division | segmentation stator which is arrange | positioned annularly and comprises a stator, The circumferential direction outer peripheral surface 15 and the circumferential direction inner peripheral surface 16 of the said mold coil 1 shown in FIG. The taper angle is set to an angle corresponding to the number of divisions of the divided stator. For this reason, when the divided stators are assembled in an annular shape, the gap between the adjacent divided stators can be minimized, and the performance of the stator can be improved. The taper angle may be set corresponding to the number of divisions of the divided stator, and in this embodiment, is set to about 10 ° (a total of 20 ° of both-side tapers).

  The coil 1a includes terminal portions 2a, 3a, 4a, 5a extending from the yoke side on the coil end side of the four cylindrical coil members 6, 7, 8, 9 arranged in the radial direction, and teeth side. The four cylindrical coil members 6, 7, 8, 9 arranged in the radial direction are connected in parallel by short-circuiting the extending terminal portions 2b, 3b, 4b, 5b. Accordingly, the thick wire rectangular coil having a rectangular cross section is configured to exhibit the same function as edgewise winding.

  By adopting the above configuration, it is possible to suppress the generation of eddy currents, which has been a problem when edge-wise winding a thick rectangular coil having a conventional rectangular cross section, and improve the performance of the coil. Moreover, since the windings 2, 3, 4 and 5 are made of copper wires having a rectangular cross section, and the windings 2, 3, 4 and 5 are configured to contact each other without any gaps, the coil space is increased. The rate does not decrease.

  On the other hand, when the coil 1a is resin-molded by a conventional method, it is difficult to fill the mold resin up to the periphery of the internal coil member.

  The mold coil manufacturing method according to the present invention makes it possible to fill the mold resin between the windings of the coil member arranged inside the coil configured as described above without any gaps.

  The mold resin is not particularly limited, and various resins can be employed. For example, what knead | mixed the alumina powder etc. for improving heat conductivity to heat resistant resin materials, such as liquid crystal polymer resin, polyphenylene sulfide resin, and an epoxy resin, is employable. Also, the molding technique is not particularly limited. In the present embodiment, the present invention is applied to a manufacturing method using an injection molding method. Note that the method of forming the molded coil is not limited to injection molding, and various methods can be employed.

  FIG. 5 shows a schematic configuration of an example of a mold apparatus 30 for manufacturing the molded coil 1.

  As shown in FIG. 5, the mold apparatus 30 includes a lower mold 32 and an upper mold 31. The upper mold 31 is shown in a state where the substrate 33 is seen through so that the form of the mold portion can be easily understood.

  As shown in FIGS. 5 and 6, the upper mold 31 is formed to extend downward from the substrate 33 and correspond to the inner peripheral surface of the coil 1a, and one terminal of the coil 1a. The holding part 41 of the first holding mechanism 40 for holding the part 21 in the mold, each part 61, 62, 63 of the mold resin escape mechanism 60 that can accommodate the removed mold resin, and winding of the coil 1a It comprises pressing parts 23a, 24a, 25a, 26a that press the upper part of the line.

  On the other hand, the lower mold 32 includes an outer peripheral mold part 35 corresponding to the outer peripheral form of the coil 1a and each part of the first terminal part holding mechanism 40 that accommodates and holds one terminal part 21 of the coil 1a in the mold. 42, 43, 44, 45, the terminal portion insertion groove 54 and the bottom surface 55 of the second terminal portion holding mechanism 50 that accommodates and holds the other terminal portion 22 in the mold, the mold resin injection path 70, and the discharge hole 71. With. In this embodiment, the mold resin injection path is provided in the middle part of the lower mold 32 for easy understanding. However, the mold resin injection path 70 and the discharge hole 71 can be easily filled and released from the mold resin. What is necessary is just to provide in a site | part.

  The first terminal holding mechanism 40 is provided in the upper die 31 and in the holding member receiving groove 44 provided in the lower die 32, and the holding member 41 provided in contact with the upper surface of the terminal portion 21 of the coil 1a. And a pressing member 42 slidably held in a state in which the coil spring 43 is elastically biased upward. Although not shown, the upper surface 42 of the pressing member is set at a position where a predetermined gap is formed between the windings of the coil 1a.

  The second terminal holding mechanism 50 includes a pinching member 51 slidably held in a holding member receiving groove 52 provided in the upper die 31, and the lower die 32. And a guide groove 54 for guiding the member 51 to the bottom of the mold part. The pinching member 51 is configured so that the terminal portion 22 can be pinched with the bottom surface 55 to be positioned and held in the mold resin injection step, and the mold resin does not adhere to the surface of the terminal portion.

  Hereafter, the manufacturing process of the mold coil 1 using the said metal mold apparatus 3 is demonstrated using FIGS. 7-10.

  As shown in FIG. 7, the coil 1 a is inserted into the molding space 35 of the lower mold 32. In the coil 1 a, one terminal portion 21 is placed on the upper surface 45 of the pressing member 42, and the other terminal portion 22 is positioned on the bottom surface 55 of the guide groove 54. In this state, the coil 1a is not positioned, and each terminal portion of the coil may be separated from the portion.

  In the above state, the upper die 31 and the lower die 32 are brought close to each other and fitted until the state shown in FIG. In this state, the one terminal portion 21 is sandwiched and positioned between the pressing portion 41 and the upper surface 45 of the pressing member 42. The other terminal portion 22 is positioned by being pinched between the bottom surface 55 of the guide groove 54 and the lower surface 56 of the pinching member 51. The positioning portions of both the terminal portions 21 and 22 are set so that a predetermined gap is formed between the windings of the coil 1a. Thereby, the coil 1a is positioned and held in the mold 30 with a predetermined gap between windings adjacent in the coil axis direction.

  As shown in FIG. 9, the mold resin M is injected from the mold resin injection path 70 and the discharge hole 71 into the molding space formed by the upper mold 31 and the lower mold 32 and in which the coil 1 is positioned. The Since the mold resin M is injected into the mold with a gap between the windings of the coil 1a, the mold resin can be filled into the coil 1a.

  Immediately after performing the mold resin injection step, that is, before the mold resin M is cured, the upper die 31 and the lower die 32 are brought closer to each other by a predetermined amount. As shown in FIG. 10, at this time, as shown in FIG. 5, the pressing portions 23a, 24a, 25a, and 26a formed on the upper mold 31 press the upper winding portion of the coil 1a to Compress. In the present embodiment, the coil 1a can be compressed by displacing not only the pressing portions 23a, 24a, 25a, and 26a but also the entire upper die 31 downward.

  As shown in FIG. 10, the pressing member 42 of the first terminal portion holding mechanism 40 is in a state where one terminal portion 21 is pressed and held between the pressing portion 41 provided on the upper mold 31. To be displaced. Thereby, the coil 1a whole is compressed, and between each winding can be adjoined to the up-down direction, and the clearance gap between windings can be reduced.

  In the above embodiment, the entire upper die 31 is displaced downward to compress the coil 1a in the axial direction, and accordingly, the mold resin must be excluded from the molding space. In this embodiment, the mold resin escape mechanism 60 is provided so that the mold resin can escape from the mold.

  The mold resin escape mechanism 60 is configured such that a piston 63 is slidably held via a coil spring 61 in a mold resin retraction hole 63 provided in the upper mold 31. The piston 63 is elastically urged by the coil spring 61 so as not to slide and displace at the pressure at which the mold resin is injected. On the other hand, when a large pressure is applied to the mold resin in the mold due to the displacement of the upper mold 31, the piston 63 is moved upward to form the resin retraction hole 63 on the inner peripheral surface, and the upper mold 31. The resin removed by the movement flows into the resin escape hole 63. Thereby, the coil 1 a can be compressed in the axial direction inside the mold 30. The resin escape mechanism is used when the resin is injected into the sealed space such as an injection molding method at a high pressure, and is not necessary in the casting molding method performed in the open space. Further, in the case of adopting a configuration in which only the pin or the like brought into contact with the coil 1a is displaced without displacing the entire upper die 31, it is not necessary as long as the resin removal amount is not large. The resin that has flowed into the retraction hole may be excised after the mold release step, as in the case of removing burrs.

  FIG. 11A schematically shows a cross section of the coil 1a immediately after the molding resin injection step. As shown in this figure, a gap is formed between the windings adjacent in the axial direction, and this gap is filled with mold resin. In this state, when the coil 1a is compressed in the coil axis direction, the vertical windings are brought close to each other as shown in FIG. 11B, and excess resin between the windings is eliminated.

  With the manufacturing method according to the above-described embodiment, the mold resin can be filled between the windings of the coil without any gap to increase the heat dissipation, and the space factor can be increased by bringing the windings close to each other.

  In the above embodiment, both the terminal portions 21 and 22 of the coil are held in the mold 30 and the mold resin injection step and the coil shaping step are performed. However, the terminal portions 21 and 22 are exposed outside the mold. The above steps can also be performed.

  In the embodiment, the resin escape mechanism 60 is provided so that the mold resin can be removed in response to the mold displacement. However, the resin escape mechanism 60 may be discharged out of the mold.

  Furthermore, in the present embodiment, the coil 1a is compressed in the coil axis direction, but a force is applied from the direction orthogonal to the coil axis to correct disturbances in the coil winding arrangement and the like, and mold resin is injected. can do.

  For example, protrusions that abut the inner peripheral portion 34 of the upper die 31 and the outer peripheral portion of the lower die 32 in contact with the inner peripheral portion and the outer peripheral portion of the coil 1 in a coil positioning state to restrict the displacement of the coil in the radial direction. By providing this, the shape and posture of the coil 1a can be held or corrected in the mold. Thereby, a uniform resin coating layer can be formed around the coil 1a.

  As shown in FIG. 12, the grooves 23a, 23b, 23c, 24a, 24b, 24c, 25a, 25b, 25c, 26a, 26b, and 26c are formed around the coil molded body 16 after the molding. Since each of the grooves reaches the surface of the coil 1a molded inside, the molded state of the coil 1a can be visually inspected.

  The present invention is not limited to the embodiment described above. It should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is defined not by the above-described meaning but by the scope of the claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of the claims.

Industrial availability

  Bending can be easily performed, and a mold coil with high space factor and high heat dissipation can be provided.

It is a whole perspective view of the mold coil manufactured by the manufacturing direction which concerns on this invention. It is the whole coil perspective view embedded in the mold coil shown in FIG. It is sectional drawing which follows the III-III line in FIG. It is sectional drawing which follows the IV-IV line in FIG. It is a whole perspective view showing typically the structure of the metallic mold used for the manufacturing method concerning the present invention. It is sectional drawing which shows the structure and effect | action of the metal mold | die which concern on this invention. It is sectional drawing which shows the structure and effect | action of the metal mold | die which concern on this invention. It is sectional drawing which shows the structure and effect | action of the metal mold | die which concern on this invention. It is sectional drawing which shows the structure and effect | action of the metal mold | die which concern on this invention. It is sectional drawing which shows the structure and effect | action of the metal mold | die which concern on this invention. It is explanatory drawing which shows the state of the coil cross section in the middle of the manufacturing method which concerns on this invention. It is a whole perspective view of the molded coil which concerns on 2nd Embodiment which concerns on this invention.

Explanation of symbols

1a Coil 30 Inside the mold

Claims (11)

A coil positioning step of positioning the coil in the mold with a predetermined gap between windings adjacent in the coil axis direction;
A mold resin injection step of injecting a mold resin into the mold in which the coil is positioned;
Immediately after the mold resin injection step or in the middle of the mold resin injection step, the coil is compressed at least in the axial direction, and the coil shaping step for bringing the windings close together,
A mold coil manufacturing method comprising: a mold release step of taking out a coil molded body molded with the mold resin from the mold.   The method for manufacturing a molded coil according to claim 1, wherein the coil shaping step applies a force in a direction perpendicular to the coil axis to position each winding at a predetermined mold position.   The mold according to claim 1, wherein the coil shaping step is performed by a pressing member that extends from an inner periphery of the mold into the mold and is applied to a predetermined position of the winding. Coil manufacturing method.   The method for manufacturing a molded coil according to any one of claims 1 to 3, wherein the coil is formed by winding a plurality of windings in a state of being stacked in a radial direction.   The method for manufacturing a molded coil according to any one of claims 1 to 4, wherein the coil is positioned on the mold in a state where both terminal portions are exposed from the mold. A coil molding die device for resin-molding a coil,
A mold apparatus for a coil mold comprising shaping means for shaping a winding immediately after mold resin injection or in the middle of a mold resin injection process.   The mold apparatus for a coil mold according to claim 6, wherein the shaping means includes an axial direction pressing means for pressing the winding in the coil axial direction.   The coil shaping device according to any one of claims 6 and 7, wherein the shaping means includes radial pressing means capable of pressing or holding the windings in a direction perpendicular to the coil axis and positioning each winding at a predetermined position. Mold equipment.   The mold apparatus for a mold coil according to claim 7 or 8, wherein the pressing means is a pressing member that is caused to appear and disappear inside the mold. A coil molded with resin,
The coil includes a plurality of windings wound in a stacked state in the radial direction of the coil,
A molded coil in which the windings are molded in a close state, and a resin is filled between the windings.   A molded coil comprising a shaping recess extending from the outer peripheral coating layer surface to the surface of a predetermined portion of the coil molded inside.

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