JP4870504B2 - Manufacturing method of laminated core - Google Patents

Description

The present invention, a motor, a generator, in which relates to the production how a laminated core formed by laminating magnetic plate material used in transformers.

  In a conventional method for manufacturing a laminated core, the core member is caulked and laminated at the time of punching. That is, by forming, for example, a convex portion on the front side and a concave portion on the back side in the thickness direction of the core member to be punched, the concave and convex portions are press-fitted and the core members are fixed to each other by stacking. (For example, refer to Patent Document 1).

  In addition, a method is shown in which an insulating adhesive is applied to the core member and laminated, and the core members are bonded together by applying varnish as an adhesive or immersing the laminated core member in the adhesive. (For example, refer to Patent Document 2).

JP-A-6-165447 ([0007] to [0009], FIG. 5) JP 2003-324869 ([0017], [0018], FIG. 1)

  In a method of caulking a core member that has been conventionally used as a method for manufacturing a laminated core, it is necessary to provide irregularities on the core member. However, in order to ensure the positional accuracy of the irregularities between the laminated core members, A pressing process is required. For this reason, there exists a problem that a metal mold | die becomes large, a press machine itself becomes large, a some metal mold | die is needed, and an installation becomes expensive.

  In addition, there is a problem in that, by forming an uneven portion on a thin core member or caulking, processing distortion occurs in the core member and the magnetic characteristics are deteriorated. As the product becomes smaller, the influence of the processing strain due to caulking on the magnetic characteristics becomes larger, which makes it difficult to reduce the size.

  In addition, there is a method of suppressing eddy current by laminating a thin core member in order to improve magnetic characteristics, but there is a problem that it becomes difficult to form unevenness when the plate thickness is reduced.

  Since the caulking portion is only fixed by press fitting, not all the core members to be laminated are completely fixed, and there is a portion where a gap is generated between the irregularities. For this reason, there was a problem that the core members slip relative to each other during use and generate noise.

  As a method for suppressing the deterioration of magnetic characteristics due to processing strain, there is a method of fixing the core member with an adhesive, but there is a problem that the dimensional accuracy is deteriorated because the coating thickness of the adhesive varies.

  There are also methods to immerse the laminated core member in the adhesive or to infiltrate the adhesive between the punched core members, but it is difficult to allow the adhesive to penetrate into the air in the atmosphere. Are often impregnated in a vacuum.

  In addition, when an adhesive is used, the adhesive may leak between the laminated core members, and there is a problem that the manufacturing cost becomes high, such as a step of removing the protruding adhesive.

The present invention has been made in order to solve the above-described conventional problems, and does not require caulking when the core members are laminated, and has a highly accurate shape that absorbs accumulated errors due to thickness deviation of the core members. to provide a manufacturing how of the laminated core.

The method for producing a laminated core according to the present invention includes the step of placing a solid thread resin, which is a thermoplastic resin, on a reciprocating member, and reciprocating the reciprocating member on the magnetic plate material, thereby causing the thread resin to be contained in the core member of the magnetic plate material. one of the first fixing step and a step of punching laminating the magnetic plate which is fixed to the thermoplastic resin into a plurality of core members, the core member having the stacked to fix by partially disposed to heat rather than the entire surface It consists of a second fixing step in which the core members arranged at both ends in the laminating direction are heated while being pressed so as to maintain a parallel state, and the laminated core members are fixed together by the thermoplastic resin.

By the present invention lever, since the core member by a thermoplastic resin is fixed, caulking is not necessary, can be produced inexpensively laminated core and cheap die cost.

  Further, since caulking is not necessary, it is possible to reduce processing strain generated in the core member and obtain a laminated core having good magnetic properties.

  In addition, by fixing the core member with a thermoplastic resin, the adhesive strength is improved and the core members do not slide relative to each other, and even if an external force is applied during winding of the coil, the shape is not easily collapsed, and the accuracy is high. A high laminated core can be obtained.

  Furthermore, when the laminated core is disassembled, by heating, the thermoplastic resin is melted again, the core member is disassembled, and the recycling cost can be reduced.

In particular, the core members arranged at both ends in the lamination direction among the laminated core members are pressurized so as to maintain a parallel state, and the thermoplastic resin partially arranged instead of the entire surface of each core member is melted to each. Since the core member is fixed, the heated thermoplastic resin is thinly formed between the core members, the iron loss is reduced by reducing the eddy current loss, and the accumulated error due to the thickness deviation of the core member is absorbed, resulting in a highly accurate shape. Obtainable. For this reason, it is possible to reduce noises such as a beat sound emitted from the laminated core, and to obtain a motor having high energy conversion efficiency and less electromagnetic noise and vibration.

Embodiment 1 FIG.
1 is a cross-sectional view of a principal part showing a laminated core manufacturing apparatus and manufacturing method according to Embodiment 1 of the present invention. A magnetic plate material 1 is fed from a plate material roll 10 around which a magnetic plate material 1 such as an iron plate or an electromagnetic steel plate having a thickness of 1 mm or less is wound, and a pair of thermoplastic resin resin rolls 20 (in FIG. 1, resin rolls are also wound). 20 is shown, but another one is arranged in the direction perpendicular to the paper surface), and the thread-like resin 2 having a diameter of about 200 μm is fed out and arranged on the magnetic plate 1. The magnetic plate material 1 and the thread-like resin 2 are nipped and fed between the upper roller 3 and the lower rotor 4, and the upper roller 3 is heated by incorporating a heater (not shown), for example. By heating the upper roller 3 to a temperature substantially equal to the melting point of the filamentous resin 2, the filamentous resin 2 is welded to the magnetic plate material 1. The magnetic plate 1 to which the thread-like resin 2 is welded is conveyed and punched between the upper mold 5 and the lower mold 6 constituting the mold mechanism. In this way, the magnetic plate 1 to which the thread-like resin 2 is welded is laminated by sequentially repeating the conveyance of the magnetic plate 1 and the punching by the mold. FIG. 2A is a conceptual diagram showing how the magnetic plate 1 is punched in this case. In the example of FIG. 2A, the magnetic plate 1 has a substantially T-shaped core comprising a yoke part 1a, a tooth part 1b protruding from the yoke part 1a, and a tooth tip part 1c located at the tip of the tooth part 1b. Punched into member 1A. Moreover, as the thermoplastic thread-like resin 2, thermoplastic materials such as nylon, vinyl chloride, polypropylene, polystyrene, and polyethylene can be used.

  When the thread-shaped resin 2 and the magnetic plate 1 are sandwiched between the upper roller 3 and the lower roller 4, the thread-shaped resin 2 partially adheres to the upper roller 3 and cannot be continuously welded to the magnetic sheet 1 due to long-term use. Sometimes it happens. For this reason, as shown in FIG. 1B, a coating material 7 having a small surface energy is formed on the surface of the upper roller 3. Here, the surface energy will be briefly described. Since the surface of the solid is surrounded by a different kind of material, the solid surface is in a higher energy state than the inside. This excess energy on the surface is called surface energy. In the present embodiment, the provision of the low surface energy coating material 7 makes it difficult for the filamentous resin 2 to adhere to the upper roller 4 and is maintenance-free, thereby reducing manufacturing costs. As a material of the covering material 7, a method of applying and baking PTFE (polytetrafluoroethylene), other than PTFE, applying or baking PFA (perfluoroalkoxy), FEP (fluorinated ethylene propylene), CF3 polymer, or the like. There is a technique to attach.

  For example, as shown in FIG. 3 (a), the magnetic plate material 1 and the thread-like resin 2 that are punched and laminated are arranged on a positioning jig 8 provided with positioning pins 8a and are shown in FIG. 3 (b). As described above, the magnetic plate material 1 laminated by the pressing jig 9 is pressed and pressurized, and in this state, the filamentous resin 2 is melted by being left in a heating furnace for a predetermined time. Then, the magnetic plate material 1 and the positioning jig 8 are taken out from the heating furnace and cooled, and the laminated magnetic plate material 1 is fixed by the thread-like resin 2. FIG. 2B is a perspective view showing a state in which the laminated magnetic plate material 1 is fixed with the thread-like resin 2 to create the laminated core 100.

  In the example shown in FIG. 3, the laminated magnetic plate 1 is left and fixed in a heating furnace. However, as shown in FIG. 4A, a heater 11a is arranged on the positioning jig 8 and heated. May be. In addition, there are heating methods such as induction heating and laser irradiation. Further, as shown in FIG. 4B, the ultrasonic vibrator 11b is provided in the pressing jig 9, and the magnetic plate material 1 is ultrasonically vibrated, thereby melting the filamentous resin 2 and fixing the magnetic plate material 1. You can also. In the example shown in FIG. 4B, the ultrasonic vibrator 11b is attached to the pressing jig 9, but it may be attached to the positioning jig 8, and the magnetic plate material 1 is fixed by melting the filamentous resin 2. be able to.

  Further, in the example shown in FIG. 1, only one pair of roll-shaped thread-like resins 2 is arranged. However, as shown in FIG. By disposing a plurality of resins 2 on the magnetic plate material 1, the adhesive strength between the magnetic plate materials 1 can be increased and the reliability can be improved. Further, only one thread-like resin 2 may be arranged.

  Next, in the present embodiment, by disposing the filamentous resin 2 partially rather than between the magnetic plates 1, the thickness deviation of the magnetic plate 1 is absorbed and a constant laminated height is obtained over the entire laminated core. The effect to be obtained will be described. As shown in FIG. 6, the filamentous resin 2 is partially arranged on the magnetic plate 1 rather than the entire surface (in two rows in the example of FIG. 6), and the upper and lower magnetic members 1-1 and 1-4 are in a parallel state. Pressurize to maintain. At this time, even if a magnetic plate material having a plate thickness deviation (plate plate 1-3 in FIG. 6) exists, the thread-like resin 2 is divided into a thin resin portion and a thick portion as shown in the figure, and the above plate thickness deviation. By melting so as to absorb, the height of the laminated core 100 is maintained at a predetermined laminated height H over the entire surface of the magnetic plate 1 (core member 1A).

  Here, a suitable arrangement of the thread-like resin 2 on the magnetic plate material 1 will be considered. FIG. 7 shows an example in which two thermoplastic thread-like resins 2 are arranged on the core member 1A from which the magnetic plate material 1 is punched. The areas of the thermoplastic resin are S1 and S2, respectively, and the centroids are G1 and G2. The distances from the centroid O of the core member 1A to the centroids G1 and G2 of the thermoplastic resins are r1 and r2, the density of the thermoplastic resin is ρ, and the main axis passes through the centroid O (the paper plane passing through the centroid O in FIG. 7). ) And the centroids G1 and G2, the sum of the moments of the thermoplastic resin in the principal axis direction becomes substantially zero, that is, ρ · r1 · S1 · sinθ1 + ρ · r2 · S2. When satisfying sin θ2 = 0, the arrangement balance of the thermoplastic resin is improved, and the plate thickness deviation of the magnetic plate 1 can be further absorbed to obtain a constant stacking height over the entire surface of the stacked core.

  Here, when the above equation is generalized, the area of the thermoplastic resin is S1, S2,..., Sn, and the centroids are G1, G2,. The distance from the centroid O of the core member 1A to the centroids G1, G2,..., Gn of each thermoplastic resin is r1, r2,..., Rn, the density of the thermoplastic resin is ρ, and the centroid O is When the angles θ1, θ2,..., Θn formed by the main axis passing through and the centroids G1, G2,..., Gn are substantially zero, the sum of the moments of the thermoplastic resin in the main axis direction is substantially zero. When Expression (1) is satisfied, the arrangement balance of the thermoplastic resin is improved.

  Further, according to the present embodiment, by bonding the magnetic plate material 1 with the thermoplastic thread-like resin 2, caulking is unnecessary, and the die cost for punching the magnetic plate material 1 is reduced, so that the laminated core can be manufactured at low cost. Can be manufactured. In the conventional laminated core bonded by caulking, not all the magnetic plate 1 is fixed at the press-fitting portion of the uneven portion, and a gap is partially generated at the uneven portion due to the dimensional error of the magnetic plate 1. There is also. However, in the present embodiment, by fixing the magnetic plate 1 with the thermoplastic thread-like resin 2, there can be obtained a laminated core with good dimensional accuracy without deviation between the magnetic plates 1.

  In addition, when the magnetic plate 1 is caulked, the magnetic plate 1 is warped, the gaps between the magnetic plates 1 become non-uniform, eddy current loss increases, and dimensional accuracy deteriorates. However, when the magnetic plate material 1 is partially bonded, a thin and uniform gap is formed, and a laminated core with good dimensional accuracy can be obtained.

  Further, when the laminated core 100 is discarded, by heating, the filamentous resin 2 can be melted again and the laminated core 100 can be decomposed, and the recycling cost can be reduced.

Embodiment 2. FIG.
In the first embodiment, the thread-shaped resin 2 is formed into a roll shape and is disposed on the magnetic plate 1 while rotating the resin roll 20. However, as illustrated in FIG. By installing and reciprocating the shuttle 12 in the width direction of the magnetic plate 1, the filamentous resin 2 can be disposed on the magnetic plate 1. The shuttle 12 is guided and supported by a guide 13 and reciprocates on the magnetic plate 1, and the guide 13 is disposed obliquely or perpendicularly to the conveying direction of the magnetic plate 1. For this reason, as shown in FIG. 8B, the adhesion area per thread-like resin in the magnetic plate material 1 is increased, and the adhesive force between the magnetic plate materials 1 can be increased to improve the reliability. Further, as shown in FIG. 8C, the guide 13 for guiding the shuttle 12 is prepared so as to cover the periphery of the shuttle 12, for example, by flying on the air flow, the shuttle 12 is moved. It can be reciprocated.

  According to the present embodiment, the thermoplastic resin can be arranged on the magnetic plate 1 in a short time by reciprocating the shuttle 12 on which the thread-like resin 2 is installed. Moreover, since the amount of the thermoplastic resin arranged on the magnetic plate 1 can be freely adjusted by adjusting the reciprocating speed of the shuttle 12, the manufacturing cost can be reduced.

Embodiment 3 FIG.
In the first embodiment, the thread-like resin 2 is welded to the magnetic plate material 1 with the heated roller 3, but it is not necessary to weld the whole thread-like resin 2 to the magnetic plate material 1. That is, since the thread-like resin 2 does not have to fall off before the magnetic plate 1 is punched out, the thread-like resin 2 only needs to be partially fixed to the magnetic plate 1. Therefore, as shown in FIG. 9, by irradiating the laser beam from the laser beam emitter 14 onto the magnetic plate 1, the filamentous resin 2 can be welded in a short time. As a result, it is possible to shorten the time required for manufacturing by speeding up the feeding of the magnetic plate material 1.

  As shown in FIG. 10, another method for welding the laser-like thread-like resin 2 is to put a solvent, hot water, or the like in the dropping jig 15 and drop it on the magnetic plate 1 to melt the thread-like resin 2. Thus, the thread-like resin 2 can be fixed to the magnetic plate material 1. By partially welding the resin with a solvent, hot water, etc., the manufacturing equipment becomes inexpensive and the manufacturing cost can be reduced.

  Further, the filamentous resin 2 can be welded to the magnetic plate 1 using a heater. As shown in FIG. 11, a heater 16 is disposed on the magnetic plate 1 to heat the magnetic plate 1 and the thread resin 2 and melt the thread resin 2. In this way, the facility can be configured easily, and the facility cost and the maintenance cost can be reduced. Then, as shown in FIG. 12, the upper roller 3 and the lower roller 4 are arranged in the vicinity of the heater 16, and the thickness of the thread resin 2 is made uniform by sandwiching the magnetic plate material 1 and the thread resin 2. Therefore, the dimensional accuracy of the laminated core 100 can be improved. In addition, since the thread-like resin 2 can be formed on the magnetic plate 1 with a small thickness, it is possible to obtain the laminated core 100 with good magnetic characteristics such as eddy current loss and iron loss. 11 and 12, a heater is used as a heat source. However, as shown in FIG. 13, the magnetic plate material 1 and the filamentous material are fed by induction heating that energizes the heating coil 17 to generate an eddy current in the magnetic plate material 1. The resin 2 can be heated and fixed.

Embodiment 4 FIG.
In the embodiment described above, the method of heating the thread-like resin 2 and fusing it to the magnetic plate 1 has been described. However, the thread-like resin 2 can be fixed to the magnetic plate 1 by ultrasonic vibration. As shown in FIG. 14, for example, the thread-like resin 2 and the magnetic plate material 1 can be fixed by ultrasonically vibrating the vibration type roller 18 disposed on the lower side. As shown in FIG. 15A, the upper roller 3 on which the covering material 7 is formed is arranged on the upper surface of the magnetic plate material 1, and the lower surface of the magnetic plate material 1 facing the upper roller 3 is composed of an indenter 19 and a vibrator 20. The vibration type roller 18 is attached. The thread-like resin 2 is fixed to the magnetic plate 1 by sandwiching the magnetic sheet 1 and the thread-like resin 2 between the upper roller 3 and the vibration roller 18 and causing friction. As the vibrator 20, for example, as shown in FIG. 15B, a stacked piezoelectric element or a bimorph vibrator can be used. The vibration type roller 18 has the same effect even if it is attached to the upper roller 3 side.

Embodiment 5 FIG.
In the first embodiment, the method of punching the magnetic plate material 1 on which the thread-like resin 2 is arranged, laminating the magnetic plate material 1 and heating it to melt the thread-like resin 2 and fixing the magnetic plate materials 1 to each other has been described. As shown in FIG. 16, the lower die 6 may be kept at a predetermined temperature at all times by embedding a heater 26 in the lower die 6. The magnetic plate material 1 punched into the lower die 6 is heated by heat transfer from the lower die 6, and at the same time as the magnetic plate material 1 is punched out, the filamentous resin 2 is melted to bond the magnetic plate material 1. In addition, what is necessary is just to embed the heater 26 so that the circumference | surroundings of the magnetic board | plate material 1 (core member 1A) may be enclosed, as shown in FIG.16 (b).

  Thus, by providing the lower die 6 with the heating element, the magnetic plate 1 is fixed with the thread-like resin 2 at the same time as punching, and a laminated core can be manufactured in a short time, and an inexpensive laminated core can be obtained. .

  In the above example, the heater 26 is used in the lower mold 6. However, instead of the heater 26, the heating coil 17 is embedded in the same manner as in FIG. 16, and the heating coil 17 is energized. Accordingly, the lower mold 6 may be heated by generating an eddy current in the lower mold 6.

  In the example shown in FIG. 16, the heating source such as the heater 26 and the heating coil 27 is embedded in the lower mold 6. However, when the startup time until the equipment is operated may be slightly longer, As shown in FIG. 17, the same effect can be obtained simply by arranging the heater 26 and the heating coil 27 under the lower mold 6. In this case, since it is not necessary to provide a heating body in the lower mold 6, the manufacturing cost of the lower mold 6 can be saved.

  In the example shown in FIGS. 16 and 17, the heating element is provided for the lower mold 6, but it is not always necessary to arrange the heating element on the lower mold 6. As shown in FIG. 18A, the heater 26 and the heating coil 27 can be embedded in the upper mold 5. Further, as shown in FIG. 18B, the same effect can be obtained even if the heater 26 and the heating coil 27 are arranged on the upper part of the upper mold 5.

  Further, as shown in FIG. 19, by introducing the laser beam from the laser beam emitter 24 between the upper mold 5 and the lower mold 6, the magnetic plate material 1 is locally heated to melt the filamentous resin 2. The magnetic plate 1 can be fixed simultaneously with the punching of the magnetic plate 1. By using laser light, heating can be performed in a short time without contact, and thus there is an effect that a large amount of the laminated core 100 can be manufactured. Further, since the magnetic plate 1 is locally heated, the thermoplastic resin does not adhere to the mold, and the mold maintenance cost can be reduced.

  As a method of locally heating the magnetic plate 1, a discharge phenomenon can be used. As shown in FIG. 20, a spark is generated between the electrodes 32 by applying a high voltage to a pair of electrodes 32 connected to the coil 31. When the magnetic plate material 1 is punched, the electrode 32 is moved instantaneously so as not to interfere with the mold mechanism. When the upper die 5 moves upward, the operation of moving the electrode 32 between the upper die 5 and the lower die 6 to generate a spark is repeated. In this way, while punching out the magnetic plate material 1 by the mold mechanism, a spark is generated to locally heat the magnetic plate material 1 to melt the filamentous resin 2 and fix the magnetic plate material 1. Thus, since the magnetic plate material 1 is locally heated, the thermoplastic resin does not adhere to the mold mechanism (upper mold and lower mold), and the mold maintenance cost can be reduced. Moreover, compared with the case where a laser beam is used, an installation cost can be saved and the laminated core 100 can be manufactured at low cost.

  In the example shown in FIG. 20, a spark is generated by applying a high voltage. However, a spark may be generated by installing a piezoelectric element instead of a high-voltage power supply and applying a load to the piezoelectric element.

Embodiment 6 FIG.
In the fifth embodiment, the method of melting the filamentous resin 2 by heating the magnetic plate 1 or the mold is shown. However, as in the fourth embodiment, the magnetic plate 1 may be fixed using ultrasonic vibration. it can. As shown in FIG. 21, a built-in type vibrator 43 including an indenter 41 and a vibrator 42 is disposed below the lower mold 6 so as to press the punched magnetic plate material 1. The filamentous resin 2 is fixed to the magnetic plate 1 by vibrating and rubbing the magnetic plate 1 and the filamentous resin 2 with the built-in vibrator 43. Since it is not necessary to heat the magnetic plate material 1 or the mold, it is possible to shorten the mold maintenance and setup time required to remove the attached thermoplastic resin.

  Further, as shown in FIG. 22, the built-in vibrator 43 may be disposed on the side surface of the lower mold 6 so that the magnetic plate material 1 is vibrated from the side surface. By arranging on the side instead of the lower side of the magnetic plate 1, there is no need to move the built-in vibrator 23 according to the change in the number of magnetic plates 1, and a small and inexpensive facility can be obtained. Manufacturing cost can be reduced.

Embodiment 7 FIG.
In Embodiment 1, the thread-like resin 2 is arranged on one side of the magnetic plate material 1, but as shown in FIG. 23, the magnetic plate material 1 is placed in the central space portion of the donut-shaped resin roll 50 wound with the thread-like thermoplastic resin. It is also possible to arrange the filamentous resin 2 on the front and back surfaces of the magnetic plate 1 by winding the filament roll 2 around the magnetic plate 1 while rotating the resin roll 50. As shown in FIG. 23, two magnetic plate materials 1 are simultaneously conveyed, and two magnetic plate materials 1 are simultaneously punched and laminated by disposing the thread-like resin 2 on the front and back surfaces of one magnetic plate material 1. Can do. As shown in FIG. 23 (b), by simply placing the thread-like resin 2 on one of the two magnetic plates 1, the two laminated magnetic plates 1 can be fixed with the yarn-like resin 2. It becomes possible. Thus, by simultaneously punching the two magnetic plate materials 1, the lamination and bonding time of the magnetic plate materials 1 can be shortened, and the laminated core 100 can be manufactured at a low cost. Further, even if the magnetic plate 1 is thinned, by stacking two sheets, the rigidity of the magnetic plate 1 is increased, and the amount of plastic deformation at the time of punching can be suppressed, and the laminated core 100 with good dimensional accuracy can be manufactured. .

It is principal part sectional drawing which shows the manufacturing apparatus and manufacturing method of the laminated core by Embodiment 1 of this invention. It is a perspective view which shows the mode of the punching and lamination | stacking of the magnetic board | plate material by Embodiment 1 of this invention. It is a figure which shows the mode of the positioning of the magnetic board | plate material by Embodiment 1 of this invention. It is a figure which shows the mode of the adhering of the laminated magnetic board material by Embodiment 1 of this invention. It is a figure which shows the manufacturing method of the laminated core of the other example by Embodiment 1 of this invention. It is sectional drawing which shows the state of lamination | stacking of the magnetic board | plate material by Embodiment 1 of this invention. It is a top view which shows the mode of arrangement | positioning of the filamentous resin by Embodiment 1 of this invention. It is a figure which shows the manufacturing apparatus and manufacturing method of the laminated core by Embodiment 2 of this invention. It is a figure which shows the manufacturing apparatus and manufacturing method of a laminated core by Embodiment 3 of this invention. It is a figure which shows the manufacturing apparatus and manufacturing method of a laminated core by Embodiment 3 of this invention. It is a figure which shows the manufacturing apparatus and manufacturing method of a laminated core by Embodiment 3 of this invention. It is a figure which shows the manufacturing apparatus and manufacturing method of a laminated core by Embodiment 3 of this invention. It is a figure which shows the manufacturing apparatus and manufacturing method of a laminated core by Embodiment 3 of this invention. It is a figure which shows the manufacturing apparatus and manufacturing method of a laminated core by Embodiment 4 of this invention. It is a figure which shows the manufacturing apparatus of the laminated core by Embodiment 4 of this invention. It is a figure which shows the manufacturing apparatus of the laminated core by Embodiment 5 of this invention. It is a figure which shows the manufacturing apparatus of the laminated core by Embodiment 5 of this invention. It is a figure which shows the manufacturing apparatus of the laminated core by Embodiment 5 of this invention. It is a figure which shows the manufacturing apparatus of the laminated core by Embodiment 5 of this invention. It is a figure which shows the manufacturing apparatus of the laminated core by Embodiment 5 of this invention. It is a figure which shows the manufacturing apparatus of the laminated core by Embodiment 6 of this invention. It is a figure which shows the manufacturing apparatus of the laminated core by Embodiment 6 of this invention. It is a figure which shows the manufacturing apparatus of the laminated core by Embodiment 7 of this invention.

Explanation of symbols

1 Magnetic plate material, 2 Filament resin, 3 Upper roller, 4 Lower roller, 5, Upper mold, 6 Lower mold,
7 coating material, 8 positioning jig, 9 pressing jig, 11a heater,
11b ultrasonic transducer, 12 shuttle, 13 guide, 14 laser light emitter,
15 dropping jig, 16 heater, 17 heating coil, 18 vibration type roller,
19 indenters, 20 vibrators, 26 heaters, 27 heating coils,
100 laminated core.

Claims (2)

A solid filamentous resin, which is a thermoplastic resin, is placed on the reciprocating member, and the reciprocating member is reciprocated on the magnetic plate material, so that the filamentous resin is disposed not on the entire surface of the core member of the magnetic plate material but heated. A first fixing step that is fixed by the step, a step of punching and laminating the magnetic plate material to which the thermoplastic resin is fixed to a plurality of core members, and core members disposed at both ends in the stacking direction among the stacked core members. A method for producing a laminated core comprising: a second adhering step in which the laminated core members are adhered to each other by the thermoplastic resin by heating while pressing so as to maintain a parallel state. In the first fixing step, one or more thermoplastic resins are disposed on the core member, and the areas of the thermoplastic resins are S1, S2,..., Sn (n is a natural number),
The centroids G1, G2,..., Gn of the respective areas S1, S2,..., Sn and the centroids O of the core members are distances r1, r2,.
The density of the thermoplastic resin is ρ,
When the angles formed by the principal axis passing through the centroid O of the core member and the centroids G1, G2,..., Gn of the areas of the respective thermoplastic resins are respectively θ1, θ2,.
The said thermoplastic resin is arrange | positioned so that following formula (1) may be satisfy | filled, The manufacturing method of the laminated core of Claim 1 characterized by the above-mentioned.

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