WO2017199703A1 - Metal plate laminate and method for manufacturing same - Google Patents
Metal plate laminate and method for manufacturing same Download PDFInfo
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- WO2017199703A1 WO2017199703A1 PCT/JP2017/016296 JP2017016296W WO2017199703A1 WO 2017199703 A1 WO2017199703 A1 WO 2017199703A1 JP 2017016296 W JP2017016296 W JP 2017016296W WO 2017199703 A1 WO2017199703 A1 WO 2017199703A1
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- laminated
- metal plate
- insulating sheet
- plate laminate
- aramid
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/024—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with slots
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/04—Details of the magnetic circuit characterised by the material used for insulating the magnetic circuit or parts thereof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/26—Rotor cores with slots for windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/10—Applying solid insulation to windings, stators or rotors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Definitions
- the present invention relates to a laminate in which a plurality of metal plates are laminated, and a metal plate laminate in which a skew is introduced after inserting an insulating sheet mainly made of aramid paper into a slot, and a method for manufacturing the metal plate laminate, particularly a rotor or a fixing in a motor
- the present invention relates to a child and a manufacturing method thereof.
- a sheet-like insulating material or resin coating is used to insulate the slot from the coil.
- an insulating layer is formed by resin coating, a method of fixing at high temperature after spraying a thermosetting resin powder is often used.
- a dust-proof facility considering the safety of workers and a curing furnace used for curing after spraying the resin are required.
- energy consumption is also large.
- an insulating layer having a uniform thickness can be formed on a smooth surface, but in the case of an intricate structure such as a slot, it has corners such as the end of the slot.
- the insulating layer in the part tends to be thin. Therefore, although it is necessary to set the thickness at the time of powder resin spraying as a whole as a whole, when the insulating layer becomes thick, the space factor of the coil is reduced accordingly, and there is a problem that the efficiency is lowered.
- the strip-like sheet-like insulating material is inserted into the slot of the stator or rotor in a state of being curved along the shape of the slot.
- the motor can be made smaller and more efficient.
- continuous insertion by an automatic insertion machine having excellent efficiency is widely used.
- a slot subjected to skew since the shape of the slot is not linear, it is difficult to insert a sheet-like insulating material by an automatic insertion machine. Therefore, as disclosed in Japanese Patent Application Laid-Open No.
- a resin film such as a polyethylene naphthalate film or a polyethylene terephthalate film is used for the insulating sheet.
- these resin films are used alone, there is a problem that the corners and burrs of the slot openings are the starting points, and the resin film is likely to be torn or torn.
- Japanese Patent Application Laid-Open No. 2006-197662 discloses a skewed stator using a laminated film of a polyethylene naphthalate (PEN) film and a polyphenylene sulfide (PPS) film as an insulating sheet.
- PEN polyethylene naphthalate
- PPS polyphenylene sulfide
- the present invention provides a metal laminate in which a high heat-resistant insulating sheet composed of aramid paper and a resin film is applied to a slot of a skewed metal plate laminate, a manufacturing method thereof, and a rotor and a stator.
- the purpose is to do.
- the present invention includes the following aspects. 1. A step of laminating a plurality of metal plates, wherein the laminated metal plates have slots parallel to the thickness direction of the metal plates; Inserting a laminated insulating sheet formed by laminating aramid paper and a resin film into the slot; Introducing skew by rotating the stacked metal plates at different angles; The manufacturing method of the metal plate laminated body containing this. 2. The method for producing a metal plate laminate according to 1 above, wherein the laminated insulating sheet has a two-layer structure in which aramid paper is laminated on one side of a resin film. 3.
- a laminated insulating sheet comprising at least one layer each of aramid paper and a resin film inserted into the slot;
- a metal plate laminate comprising: 7).
- Said (b) laminated insulating sheet is a metal plate laminated body of said 6 which is a 2 layer structure which laminated
- FIG. 2 is a metal plate laminate model of Example 1.
- FIG. It is a photograph of the metal plate laminated body in which skew was formed. It is sectional drawing which showed an example of the laminated insulation sheet of a 3 layer structure.
- the laminated insulating sheet is a laminated sheet having a layer structure of at least two layers in which one or both sides of a resin film are bonded to aramid paper.
- FIG. 3 is a cross-sectional view showing an example of a laminated insulating sheet having a three-layer structure.
- the laminated insulating sheet 10 has a three-layer structure of aramid paper-resin film-aramid paper in which the aramid paper 11 is adhered to the front and back surfaces of the resin film 12, respectively.
- the thickness of the insulating laminated sheet is preferably 30 ⁇ m to 2000 ⁇ m, preferably 35 ⁇ m to 600 ⁇ m, and more preferably 40 ⁇ m to 200 ⁇ m.
- the elongation at break of the laminated insulating sheet at room temperature is preferably 15% or more, more preferably 20% or more. Since a two-layer product in which one resin film and one aramid paper are bonded together can provide a thin insulating layer, miniaturization of motors and generators can be expected. Since aramid paper is superior in long-term heat resistance as compared with general-purpose resin films, it is preferable to arrange aramid paper on the higher temperature side. A three-layer laminated insulating sheet having a structure in which one resin film is sandwiched between two sheets of aramid paper has an advantage of having a target structure in the thickness direction, and thus is less likely to warp after bonding. Therefore, it is suitable for use in an automatic insertion machine.
- Adhesive can be used for adhesion of the aramid paper to the resin film.
- the adhesive is not particularly limited, and a commercially available epoxy resin-based, phenol resin-based or acrylic resin-based curing type adhesive can be used.
- the adhesive can be applied or impregnated on one or both surfaces of the resin film and the aramid paper, and the resin film and the aramid paper can be bonded and bonded.
- aramid means a linear polymer compound in which 60% or more of amide bonds are directly bonded to an aromatic ring.
- examples of such aramids include polymetaphenylene isophthalamide and copolymers thereof, polyparaphenylene terephthalamide and copolymers thereof, and copolyparaphenylene 3,4'-diphenyl ether terephthalamide.
- These aramids are industrially produced by, for example, a solution polymerization method by a condensation reaction with an aromatic acid dichloride and an aromatic diamine, a two-step interfacial polymerization method, etc., and can be obtained as a commercial product.
- the present invention is not limited to this.
- polymetaphenylene isophthalamide is preferable in that it has good molding processability, flame retardancy, heat resistance, and the like.
- an aramid fibrid is a film-like fine particle made of aramid and may be referred to as an aramid pulp.
- Examples of the production method include those described in JP-B-35-11851, JP-B-37-5732, and the like.
- aramid fibrids have paper-making properties like ordinary wood pulp, it can be formed into a sheet by a paper machine after being dispersed in water.
- a so-called beating process can be performed for the purpose of maintaining quality suitable for papermaking. This beating process can be performed by a disk refiner, a beater, or other papermaking raw material processing equipment that exerts a mechanical cutting action.
- the shape change of the fibrid can be monitored with the freeness as defined in JIS P8121.
- the freeness of the aramid fibrid after the beating treatment is preferably in the range of 10 to 300 cm 3 (Canadian Standard Freeness).
- the freeness By controlling the freeness to 300 cm 3 or less, the strength of the sheet molded therefrom is increased.
- By setting the freeness to 10 cm 3 or more it is possible to increase the utilization efficiency of the mechanical power to be input, and to increase the throughput per unit time. Furthermore, moderate refinement
- the aramid short fiber is obtained by cutting a fiber made of aramid into a predetermined length.
- a fiber made of aramid examples include DuPont's “Nomex (registered trademark)”, “Kevlar ( Registered trademark), Teijin's “Conex (registered trademark)", “Technola (registered trademark)", and the like, but are not limited thereto.
- the aramid short fibers can preferably have a fineness within a range of 0.05 dtex or more and less than 25 dtex.
- Fibers having a fineness of 0.05 dtex or more are less likely to agglomerate during production by a wet method (described later), and fibers having a fineness of less than 25 dtex have an appropriate fiber diameter.
- the density is 1.4 g / cm with a perfect circle shape
- the diameter is 45 microns or more
- the aspect ratio may be reduced, the mechanical reinforcement effect may be reduced, and the uniformity of the aramid paper may be deteriorated.
- the length of the aramid short fibers is preferably selected from the range of 1 mm or more and less than 25 mm.
- the length of the short fiber is 1 mm or more, the mechanical properties of the aramid paper will be sufficient, and if it is less than 25 mm, the occurrence of “entanglement” and “binding” will occur during the production of the aramid paper by the wet method described later. Can be suppressed.
- the aramid paper is a sheet-like material mainly composed of the aramid fibrid and the aramid short fiber, and generally has a thickness of 20 ⁇ m to 1000 ⁇ m, preferably 25 ⁇ m to 500 ⁇ m, more preferably 30 ⁇ m to It has a thickness of 100 ⁇ m. Furthermore, the aramid paper generally has a basis weight of 10 g / m 2 to 1000 g / m 2 , preferably 15 g / m 2 to 400 g / m 2 , more preferably 20 g / m 2 to 100 g / m 2. Have.
- the mixing ratio of the aramid fibrid and the aramid short fiber can be arbitrary, but the ratio (mass ratio) of the aramid fibrid / aramid short fiber is preferably 1/9 to 9/1, more Although it is preferably 2/8 to 8/2, it is not limited to this range.
- Aramid paper is generally produced by a method of mixing the above-mentioned aramid fibrid and aramid short fibers and then forming a sheet.
- a method of forming a sheet using an air flow after dry blending the aramid fibrid and the aramid short fiber, a method of forming a sheet using an air flow, after the aramid fibrid and the aramid short fiber are dispersed and mixed in a liquid medium, the liquid permeation is performed.
- a so-called wet papermaking method using water as a medium is preferably selected.
- a single or mixed aqueous slurry containing at least aramid fibrids and aramid short fibers is fed to a paper machine and dispersed, then dewatered, squeezed and dried to be wound as a sheet. Is common.
- a long paper machine As the paper machine, a long paper machine, a circular paper machine, an inclined paper machine, and a combination paper machine combining these are used.
- a composite sheet composed of a plurality of paper layers can be obtained by forming and combining slurry having different blending ratios.
- Additives such as a dispersibility improver, an antifoaming agent, and a paper strength enhancer are used as necessary during papermaking.
- the aramid paper obtained as described above can be improved in density and mechanical strength by hot pressing at high temperature and high pressure between a pair of rolls. Examples of the hot pressure conditions include, but are not limited to, when using a metal roll, a temperature of 100 to 400 ° C. and a linear pressure of 50 to 400 kg / cm.
- a plurality of aramid papers can be laminated during hot pressing. The above hot pressing can be performed a plurality of times in an arbitrary order.
- a polyethylene terephthalate film, a polyethylene naphthalate film, or a polyphenylene sulfide film can be used as the resin film.
- the resin film preferably has a breaking elongation of 60% or more at normal temperature, more preferably 100% or more, and even more preferably 150% or more, and the thickness is not particularly limited.
- the thickness is preferably 10 ⁇ m to 1000 ⁇ m, more preferably 20 ⁇ m to 600 ⁇ m, more preferably 30 ⁇ m to 200 ⁇ m, and more preferably 30 ⁇ m to 100 ⁇ m.
- Such films include, for example, “Teflex (registered trademark)”, “Teijin (registered trademark) Tetron (registered trademark), film”, “Teonex (registered trademark)”, Toray ( “Torelina (registered trademark) film” of the company etc. can be illustrated, but is not limited to these.
- a motor is a device that converts electrical energy into mechanical energy using magnetic repulsion between a rotor and a stator.
- motors and small motors such as automobiles
- a metal conductor or a magnet is used for the rotor or the stator, but a metal plate laminate in which thin steel plates are laminated is used in order to reduce eddy current loss.
- a method of fixing the laminated metal plates there are a method of applying and bonding an adhesive to each metal plate, and a method of integrating by applying force in the axial direction of the laminated body. Further, in order to protect the coil and suppress the leakage current, it is necessary to provide an insulating layer between the coil and the stator or between the coil and the rotor. The optimum insulating layer is selected depending on the applied voltage and the amount of heat generated. In the present invention, a laminated insulating sheet containing aramid paper and a resin film is used for a plurality of metal plate laminates.
- the coil is inserted after the skew is formed.
- Another method of imparting skew is a method of imparting skew by shifting each laminated plate after laminating metal plates without shifting.
- the method of shifting the laminated plates is to form irregularities on each laminated plate in advance so that it rotates by a certain angle, and then twisting the uppermost layer and the lowermost layer after lamination, or all laminated laminates
- the coil may be inserted before or after the skew is applied.
- a polymetaphenylene isophthalamide fibrid was produced using a pulp particle production apparatus (wet precipitation machine) composed of a combination of a stator and a rotor described in JP-A-52-15621. This was processed with a disaggregator and a beater to adjust the length weighted average fiber length to 0.9 mm. The freeness of the obtained aramid fibrid was 90 cm 3 . Meanwhile, a DuPont meta-aramid fiber (Nomex (registered trademark), single yarn fineness 2 denier) was cut into a length of 6 mm (hereinafter referred to as “aramid short fiber”).
- aramid short fiber a DuPont meta-aramid fiber
- Example 1 Aramid paper (basis weight: 27.2 g / m 2 , thickness: 0.042 mm, density: 0.64 g / cm 3 ) and polyethylene terephthalate film (Teijin DuPont Films Ltd.) prepared by the method described in Reference Example “Teflex (registered trademark) FT, thickness 50 ⁇ m”, elongation at break at room temperature 220%) was bonded together with an adhesive to obtain a three-layer laminate of aramid paper-polyethylene terephthalate film-aramid paper. The main characteristics of the laminate thus obtained were evaluated by the following methods.
- Each metal plate is provided with a slot 2 at the same position on the circumference. Screw holes 7 are formed in the upper lid 4 and the lower base 6 on the upper side of the slot 2.
- a rotation column connected to the upper lid 4 rotates each metal plate by the same angle, thereby forming a skew.
- the strip-shaped laminated insulating sheet 8 with holes 9 was inserted along the curved surface of the slot 2 and fixed with screws and washers in accordance with the holes 9 of the laminated insulating sheet, the upper lid 4 and the holes 7 of the base 6. The presence or absence of breakage of the laminated insulating sheet 8 was investigated by rotating the handle to 60 °.
- Example 2 Aramid paper (basis weight: 41.2 g / m 2 , thickness: 0.058 mm, density: 0.71 g / cm 3 ) and polyethylene terephthalate film (Teijin DuPont Films Ltd.) produced by the method described in Reference Example “Teflex (registered trademark) FT, thickness: 80 ⁇ m”, elongation at break at room temperature: 220%) was bonded with an adhesive to obtain a two-layer laminate of an aramid paper-polyethylene terephthalate film. The main characteristics of the laminate thus obtained were evaluated in the same manner as in Example 1.
- the obtained three-layer insulating sheet has a structure in which aramid paper is provided on the surface, it is expected to be used for a rotor or a stator of a motor that requires high heat resistance.
Abstract
Provided is a method for manufacturing a metal plate laminate, said method including: a step in which multiple metal plates are laminated, the laminated metal plates having a slot parallel to the thickness direction of the metal plates; a step in which a laminate insulating sheet formed by laminating aramid paper and a resin film is inserted into the slots; and a step in which the laminated metal plates are rotated and their angle is changed, thereby introducing a skew.
Description
本発明は、複数の金属板を積層させた積層体において、スロットにアラミド紙を主体とする絶縁シートを挿入した後にスキューを導入した金属板積層体及びその製造方法、特にモータにおける回転子または固定子及びその製造方法に関する。
The present invention relates to a laminate in which a plurality of metal plates are laminated, and a metal plate laminate in which a skew is introduced after inserting an insulating sheet mainly made of aramid paper into a slot, and a method for manufacturing the metal plate laminate, particularly a rotor or a fixing in a motor The present invention relates to a child and a manufacturing method thereof.
モータの固定子や回転子においてスロットとコイルの絶縁にはシート状絶縁材料や樹脂塗装等の手法が用いられている。樹脂塗装によって絶縁層を形成する場合には、熱硬化性樹脂の粉体を吹き付けた後に、高温で固定化する手法が多く用いられている。熱硬化性樹脂を使用する場合には、作業者の安全に配慮した防塵設備や、樹脂吹き付け後の硬化に使用する硬化炉を必要とする。また、絶縁シートを適応した場合と比較すると、硬化炉を使用するため、エネルギー消費量も多い。さらに、粉体樹脂を吹き付ける場合、平滑な面には均一な厚みの絶縁層を形成することが可能であるが、スロットのような入り組んだ構造の場合にはスロットの端部など、角を有する部分の絶縁層は薄くなる傾向にある。そのため、全体としての粉体樹脂吹き付け時の厚みを厚く設定する必要があるが、絶縁層が厚くなると、その分コイルの占積率が低下するため、効率が低下するという課題がある。
In the stator and rotor of a motor, a sheet-like insulating material or resin coating is used to insulate the slot from the coil. When an insulating layer is formed by resin coating, a method of fixing at high temperature after spraying a thermosetting resin powder is often used. In the case of using a thermosetting resin, a dust-proof facility considering the safety of workers and a curing furnace used for curing after spraying the resin are required. Moreover, compared with the case where an insulating sheet is applied, since a curing furnace is used, energy consumption is also large. Further, when powder resin is sprayed, an insulating layer having a uniform thickness can be formed on a smooth surface, but in the case of an intricate structure such as a slot, it has corners such as the end of the slot. The insulating layer in the part tends to be thin. Therefore, although it is necessary to set the thickness at the time of powder resin spraying as a whole as a whole, when the insulating layer becomes thick, the space factor of the coil is reduced accordingly, and there is a problem that the efficiency is lowered.
一方でシート状絶縁材料を絶縁層に用いる場合には固定子や回転子のスロットに短冊状のシート状絶縁材料をスロットの形状に沿うように湾曲させた状態で挿入を行う。シート状絶縁材料の場合、粉体樹脂を吹き付けた場合よりも絶縁層が薄くなるため、モータの小型化や高効率化が可能である。挿入は効率に優れた自動挿入機による連続挿入が広く用いられている。しかしながら、スキューが施されたスロットの場合にはスロットの形状が直線的ではないため、シート状の絶縁材料を自動挿入機によって挿入することが困難である。そこで、特開２０１２－１９６０３３号公報のようにスキュー導入前のスロットが直線的な状態で絶縁シートを挿入してから積層鋼板にひねりを加えて絶縁シートと共にスキューを導入する方法が知られている。ひねりを加えるとスロット端の一方と他方の距離が広がるが、この際、挿入された絶縁シートはスロットに追随する必要がある。
On the other hand, when the sheet-like insulating material is used for the insulating layer, the strip-like sheet-like insulating material is inserted into the slot of the stator or rotor in a state of being curved along the shape of the slot. In the case of a sheet-like insulating material, since the insulating layer is thinner than when the powder resin is sprayed, the motor can be made smaller and more efficient. For insertion, continuous insertion by an automatic insertion machine having excellent efficiency is widely used. However, in the case of a slot subjected to skew, since the shape of the slot is not linear, it is difficult to insert a sheet-like insulating material by an automatic insertion machine. Therefore, as disclosed in Japanese Patent Application Laid-Open No. 2012-196033, there is known a method of introducing a skew together with an insulating sheet by inserting an insulating sheet after the slot before the skew is introduced in a straight state and then twisting the laminated steel sheet. . When a twist is applied, the distance between one end and the other end of the slot is increased. At this time, the inserted insulating sheet needs to follow the slot.
多くの場合、絶縁シートにはポリエチレンナフタレートフィルムやポリエチレンテレフタレートフィルム等の樹脂フィルムが用いられる。これらの樹脂フィルムを単体で用いる場合にはスロット開口部の角やバリが起点となって樹脂フィルムの裂けや破れが生じ易いという課題がある。特開２００６－１９７６６２号公報では、ポリエチレンナフタレート（ＰＥＮ）フィルムおよびポリフェニレンサルファイド（ＰＰＳ）フィルムの積層フィルムを絶縁シートとしたスキュー付固定子が開示されている。
In many cases, a resin film such as a polyethylene naphthalate film or a polyethylene terephthalate film is used for the insulating sheet. When these resin films are used alone, there is a problem that the corners and burrs of the slot openings are the starting points, and the resin film is likely to be torn or torn. Japanese Patent Application Laid-Open No. 2006-197662 discloses a skewed stator using a laminated film of a polyethylene naphthalate (PEN) film and a polyphenylene sulfide (PPS) film as an insulating sheet.
本発明は、スキューを有する金属板積層体のスロットに対して、アラミド紙と樹脂フィルムによって構成される高耐熱絶縁シートを適応させた金属積層体及びその製造方法、並びに回転子および固定子を提供することを目的とする。
The present invention provides a metal laminate in which a high heat-resistant insulating sheet composed of aramid paper and a resin film is applied to a slot of a skewed metal plate laminate, a manufacturing method thereof, and a rotor and a stator. The purpose is to do.
本発明は、次の態様を含む。
１．複数の金属板を積層する工程、ここで積層された金属板は金属板の厚み方向に平行なスロットを有し、
前記スロットに、アラミド紙と樹脂フィルムとを積層させてなる積層絶縁シートを挿入する工程、
前記積層された金属板を角度を変えて回転させることでスキューを導入する工程、
を含む金属板積層体の製造方法。
２．前記積層絶縁シートは、樹脂フィルムの片面にアラミド紙を積層した２層構造である、上記１の金属板積層体の製造方法。
３．前記積層絶縁シートは、樹脂フィルムの両面にアラミド紙をそれぞれ積層した３層構造である、上記１の金属板積層体の製造方法。
４．前記積層絶縁シートは、常温における破断伸度が１５％以上である、上記１～３のいずれかに記載の金属板積層体の製造方法。
５．前記積層絶縁シートは、厚みが３０μｍから２０００μｍである、上記１～４のいずれかに記載の金属板積層体の製造方法。
６．（ａ）積層された複数の金属板、ここで積層された金属板は金属板の厚み方向に平行なスロットを有し、かつ前記スロットは心棒と一定の角度をもって傾斜している、および （ｂ）前記スロットに挿入したアラミド紙と樹脂フィルムをそれぞれ少なくとも１層ずつ含む積層絶縁シート、
を含む金属板積層体。
７．前記（ｂ）積層絶縁シートは、樹脂フィルムの片面にアラミド紙を積層した２層構造である、上記６の金属板積層体。
８．前記（ｂ）積層絶縁シートは、樹脂フィルムの両面にアラミド紙をそれぞれ積層した３層構造である、上記６の金属板積層体。
９．前記（ｂ）積層絶縁シートは、常温における破断伸度が１５％以上である、上記６～８のいずれかに記載の金属板積層体。
１０．前記（ｂ）積層絶縁シートは、厚みが３０μｍから２０００μｍである、上記６～９のいずれかに記載の金属板積層体。
１１．上記６～１０のいずれかに記載の金属板積層体を含む固定子または回転子。 The present invention includes the following aspects.
1. A step of laminating a plurality of metal plates, wherein the laminated metal plates have slots parallel to the thickness direction of the metal plates;
Inserting a laminated insulating sheet formed by laminating aramid paper and a resin film into the slot;
Introducing skew by rotating the stacked metal plates at different angles;
The manufacturing method of the metal plate laminated body containing this.
2. The method for producing a metal plate laminate according to 1 above, wherein the laminated insulating sheet has a two-layer structure in which aramid paper is laminated on one side of a resin film.
3. The method for manufacturing a metal plate laminate according to 1 above, wherein the laminated insulating sheet has a three-layer structure in which aramid paper is laminated on both surfaces of a resin film.
4). 4. The method for producing a metal plate laminate according to any one of 1 to 3, wherein the laminated insulating sheet has a breaking elongation at room temperature of 15% or more.
5). 5. The method for producing a metal plate laminate according to any one of 1 to 4, wherein the laminated insulating sheet has a thickness of 30 μm to 2000 μm.
6). (A) a plurality of stacked metal plates, wherein the stacked metal plates have slots parallel to the thickness direction of the metal plates, and the slots are inclined at a constant angle with the mandrel; and (b) A laminated insulating sheet comprising at least one layer each of aramid paper and a resin film inserted into the slot;
A metal plate laminate comprising:
7). Said (b) laminated insulating sheet is a metal plate laminated body of said 6 which is a 2 layer structure which laminated | stacked the aramid paper on the single side | surface of the resin film.
8). (B) The laminated insulating sheet according to 6 above, wherein the laminated insulating sheet has a three-layer structure in which aramid paper is laminated on both surfaces of a resin film.
9. 9. The metal plate laminate according to any one of 6 to 8, wherein the (b) laminated insulating sheet has a breaking elongation at room temperature of 15% or more.
10. 10. The metal plate laminate according to any one of 6 to 9, wherein the (b) laminated insulating sheet has a thickness of 30 μm to 2000 μm.
11. A stator or rotor comprising the metal plate laminate according to any one of the above 6 to 10.
１．複数の金属板を積層する工程、ここで積層された金属板は金属板の厚み方向に平行なスロットを有し、
前記スロットに、アラミド紙と樹脂フィルムとを積層させてなる積層絶縁シートを挿入する工程、
前記積層された金属板を角度を変えて回転させることでスキューを導入する工程、
を含む金属板積層体の製造方法。
２．前記積層絶縁シートは、樹脂フィルムの片面にアラミド紙を積層した２層構造である、上記１の金属板積層体の製造方法。
３．前記積層絶縁シートは、樹脂フィルムの両面にアラミド紙をそれぞれ積層した３層構造である、上記１の金属板積層体の製造方法。
４．前記積層絶縁シートは、常温における破断伸度が１５％以上である、上記１～３のいずれかに記載の金属板積層体の製造方法。
５．前記積層絶縁シートは、厚みが３０μｍから２０００μｍである、上記１～４のいずれかに記載の金属板積層体の製造方法。
６．（ａ）積層された複数の金属板、ここで積層された金属板は金属板の厚み方向に平行なスロットを有し、かつ前記スロットは心棒と一定の角度をもって傾斜している、および （ｂ）前記スロットに挿入したアラミド紙と樹脂フィルムをそれぞれ少なくとも１層ずつ含む積層絶縁シート、
を含む金属板積層体。
７．前記（ｂ）積層絶縁シートは、樹脂フィルムの片面にアラミド紙を積層した２層構造である、上記６の金属板積層体。
８．前記（ｂ）積層絶縁シートは、樹脂フィルムの両面にアラミド紙をそれぞれ積層した３層構造である、上記６の金属板積層体。
９．前記（ｂ）積層絶縁シートは、常温における破断伸度が１５％以上である、上記６～８のいずれかに記載の金属板積層体。
１０．前記（ｂ）積層絶縁シートは、厚みが３０μｍから２０００μｍである、上記６～９のいずれかに記載の金属板積層体。
１１．上記６～１０のいずれかに記載の金属板積層体を含む固定子または回転子。 The present invention includes the following aspects.
1. A step of laminating a plurality of metal plates, wherein the laminated metal plates have slots parallel to the thickness direction of the metal plates;
Inserting a laminated insulating sheet formed by laminating aramid paper and a resin film into the slot;
Introducing skew by rotating the stacked metal plates at different angles;
The manufacturing method of the metal plate laminated body containing this.
2. The method for producing a metal plate laminate according to 1 above, wherein the laminated insulating sheet has a two-layer structure in which aramid paper is laminated on one side of a resin film.
3. The method for manufacturing a metal plate laminate according to 1 above, wherein the laminated insulating sheet has a three-layer structure in which aramid paper is laminated on both surfaces of a resin film.
4). 4. The method for producing a metal plate laminate according to any one of 1 to 3, wherein the laminated insulating sheet has a breaking elongation at room temperature of 15% or more.
5). 5. The method for producing a metal plate laminate according to any one of 1 to 4, wherein the laminated insulating sheet has a thickness of 30 μm to 2000 μm.
6). (A) a plurality of stacked metal plates, wherein the stacked metal plates have slots parallel to the thickness direction of the metal plates, and the slots are inclined at a constant angle with the mandrel; and (b) A laminated insulating sheet comprising at least one layer each of aramid paper and a resin film inserted into the slot;
A metal plate laminate comprising:
7). Said (b) laminated insulating sheet is a metal plate laminated body of said 6 which is a 2 layer structure which laminated | stacked the aramid paper on the single side | surface of the resin film.
8). (B) The laminated insulating sheet according to 6 above, wherein the laminated insulating sheet has a three-layer structure in which aramid paper is laminated on both surfaces of a resin film.
9. 9. The metal plate laminate according to any one of 6 to 8, wherein the (b) laminated insulating sheet has a breaking elongation at room temperature of 15% or more.
10. 10. The metal plate laminate according to any one of 6 to 9, wherein the (b) laminated insulating sheet has a thickness of 30 μm to 2000 μm.
11. A stator or rotor comprising the metal plate laminate according to any one of the above 6 to 10.
（積層絶縁シート）
積層絶縁シートとは樹脂フィルムの片面もしくは両面をアラミド紙と貼り合わせた、すくなくとも２層以上の層構造をなす積層シートである。図３は、３層構造の積層絶縁シートの一例を示した断面図である。積層絶縁シート１０は、上記樹脂フィルム１２の表面および裏面それぞれに、上記アラミド紙１１を接着させた、アラミド紙－樹脂フィルム－アラミド紙の３層構造である。
絶縁積層シートの厚みは、好ましくは３０μｍ～２０００μｍ、好ましくは３５μｍ～６００μｍであり、より好ましくは４０μｍ～２００μｍである。
積層絶縁シートの常温における破断伸度は、好ましくは１５％以上、より好ましくは２０％以上である。
１枚の樹脂フィルムと１枚のアラミド紙を貼りあわせた２層品は薄い絶縁層を提供することができるため、モータや発電機の小型化が期待できる。アラミド紙は汎用樹脂フィルムと比較して長期耐熱性に優れるため、より高温となる側にアラミド紙を配置することが好ましい。１枚の樹脂フィルムを２枚のアラミド紙で挟持させた構造を有する３層の積層絶縁シートは、厚さ方向に対象の構造を有するため、貼り合わせ後も反りが発生しにくいという利点があるため、自動挿入機における使用にも適している。 (Laminated insulation sheet)
The laminated insulating sheet is a laminated sheet having a layer structure of at least two layers in which one or both sides of a resin film are bonded to aramid paper. FIG. 3 is a cross-sectional view showing an example of a laminated insulating sheet having a three-layer structure. The laminatedinsulating sheet 10 has a three-layer structure of aramid paper-resin film-aramid paper in which the aramid paper 11 is adhered to the front and back surfaces of the resin film 12, respectively.
The thickness of the insulating laminated sheet is preferably 30 μm to 2000 μm, preferably 35 μm to 600 μm, and more preferably 40 μm to 200 μm.
The elongation at break of the laminated insulating sheet at room temperature is preferably 15% or more, more preferably 20% or more.
Since a two-layer product in which one resin film and one aramid paper are bonded together can provide a thin insulating layer, miniaturization of motors and generators can be expected. Since aramid paper is superior in long-term heat resistance as compared with general-purpose resin films, it is preferable to arrange aramid paper on the higher temperature side. A three-layer laminated insulating sheet having a structure in which one resin film is sandwiched between two sheets of aramid paper has an advantage of having a target structure in the thickness direction, and thus is less likely to warp after bonding. Therefore, it is suitable for use in an automatic insertion machine.
積層絶縁シートとは樹脂フィルムの片面もしくは両面をアラミド紙と貼り合わせた、すくなくとも２層以上の層構造をなす積層シートである。図３は、３層構造の積層絶縁シートの一例を示した断面図である。積層絶縁シート１０は、上記樹脂フィルム１２の表面および裏面それぞれに、上記アラミド紙１１を接着させた、アラミド紙－樹脂フィルム－アラミド紙の３層構造である。
絶縁積層シートの厚みは、好ましくは３０μｍ～２０００μｍ、好ましくは３５μｍ～６００μｍであり、より好ましくは４０μｍ～２００μｍである。
積層絶縁シートの常温における破断伸度は、好ましくは１５％以上、より好ましくは２０％以上である。
１枚の樹脂フィルムと１枚のアラミド紙を貼りあわせた２層品は薄い絶縁層を提供することができるため、モータや発電機の小型化が期待できる。アラミド紙は汎用樹脂フィルムと比較して長期耐熱性に優れるため、より高温となる側にアラミド紙を配置することが好ましい。１枚の樹脂フィルムを２枚のアラミド紙で挟持させた構造を有する３層の積層絶縁シートは、厚さ方向に対象の構造を有するため、貼り合わせ後も反りが発生しにくいという利点があるため、自動挿入機における使用にも適している。 (Laminated insulation sheet)
The laminated insulating sheet is a laminated sheet having a layer structure of at least two layers in which one or both sides of a resin film are bonded to aramid paper. FIG. 3 is a cross-sectional view showing an example of a laminated insulating sheet having a three-layer structure. The laminated
The thickness of the insulating laminated sheet is preferably 30 μm to 2000 μm, preferably 35 μm to 600 μm, and more preferably 40 μm to 200 μm.
The elongation at break of the laminated insulating sheet at room temperature is preferably 15% or more, more preferably 20% or more.
Since a two-layer product in which one resin film and one aramid paper are bonded together can provide a thin insulating layer, miniaturization of motors and generators can be expected. Since aramid paper is superior in long-term heat resistance as compared with general-purpose resin films, it is preferable to arrange aramid paper on the higher temperature side. A three-layer laminated insulating sheet having a structure in which one resin film is sandwiched between two sheets of aramid paper has an advantage of having a target structure in the thickness direction, and thus is less likely to warp after bonding. Therefore, it is suitable for use in an automatic insertion machine.
（積層絶縁シート製造方法）
アラミド紙の樹脂フィルムへの接着は、接着剤を用いることが出来る。接着剤は、特に限定されず、市販のエポキシ樹脂系、フェノール樹脂系またはアクリル樹脂系の硬化タイプ接着剤を用いることが出来る。当該接着剤を、樹脂フィルムおよびアラミド紙のいずれか、または両方の面に塗布または含浸させ、樹脂フィルムとアラミド紙を貼り合わせて接合させることができる。 (Laminated insulation sheet manufacturing method)
Adhesive can be used for adhesion of the aramid paper to the resin film. The adhesive is not particularly limited, and a commercially available epoxy resin-based, phenol resin-based or acrylic resin-based curing type adhesive can be used. The adhesive can be applied or impregnated on one or both surfaces of the resin film and the aramid paper, and the resin film and the aramid paper can be bonded and bonded.
アラミド紙の樹脂フィルムへの接着は、接着剤を用いることが出来る。接着剤は、特に限定されず、市販のエポキシ樹脂系、フェノール樹脂系またはアクリル樹脂系の硬化タイプ接着剤を用いることが出来る。当該接着剤を、樹脂フィルムおよびアラミド紙のいずれか、または両方の面に塗布または含浸させ、樹脂フィルムとアラミド紙を貼り合わせて接合させることができる。 (Laminated insulation sheet manufacturing method)
Adhesive can be used for adhesion of the aramid paper to the resin film. The adhesive is not particularly limited, and a commercially available epoxy resin-based, phenol resin-based or acrylic resin-based curing type adhesive can be used. The adhesive can be applied or impregnated on one or both surfaces of the resin film and the aramid paper, and the resin film and the aramid paper can be bonded and bonded.
（アラミド）
本発明においてアラミドとは、アミド結合の６０％以上が芳香環に直接結合した線状高分子化合物を意味する。このようなアラミドとしては、例えば、ポリメタフェニレンイソフタルアミドおよびその共重合体、ポリパラフェニレンテレフタルアミドおよびその共重合体、コポリパラフェニレン・３，４’－ジフェニルエーテルテレフタルアミドなどが挙げられる。
これらのアラミドは、例えば、芳香族酸二塩化物および芳香族ジアミンとの縮合反応による溶液重合法、二段階界面重合法等により工業的に製造されており、市販品として入手することができるが、これに限定されるものではない。これらのアラミドの中では、ポリメタフェニレンイソフタルアミドが良好な成型加工性、難燃性、耐熱性などの特性を備えている点で好ましい。 (Aramid)
In the present invention, aramid means a linear polymer compound in which 60% or more of amide bonds are directly bonded to an aromatic ring. Examples of such aramids include polymetaphenylene isophthalamide and copolymers thereof, polyparaphenylene terephthalamide and copolymers thereof, andcopolyparaphenylene 3,4'-diphenyl ether terephthalamide.
These aramids are industrially produced by, for example, a solution polymerization method by a condensation reaction with an aromatic acid dichloride and an aromatic diamine, a two-step interfacial polymerization method, etc., and can be obtained as a commercial product. However, the present invention is not limited to this. Among these aramids, polymetaphenylene isophthalamide is preferable in that it has good molding processability, flame retardancy, heat resistance, and the like.
本発明においてアラミドとは、アミド結合の６０％以上が芳香環に直接結合した線状高分子化合物を意味する。このようなアラミドとしては、例えば、ポリメタフェニレンイソフタルアミドおよびその共重合体、ポリパラフェニレンテレフタルアミドおよびその共重合体、コポリパラフェニレン・３，４’－ジフェニルエーテルテレフタルアミドなどが挙げられる。
これらのアラミドは、例えば、芳香族酸二塩化物および芳香族ジアミンとの縮合反応による溶液重合法、二段階界面重合法等により工業的に製造されており、市販品として入手することができるが、これに限定されるものではない。これらのアラミドの中では、ポリメタフェニレンイソフタルアミドが良好な成型加工性、難燃性、耐熱性などの特性を備えている点で好ましい。 (Aramid)
In the present invention, aramid means a linear polymer compound in which 60% or more of amide bonds are directly bonded to an aromatic ring. Examples of such aramids include polymetaphenylene isophthalamide and copolymers thereof, polyparaphenylene terephthalamide and copolymers thereof, and
These aramids are industrially produced by, for example, a solution polymerization method by a condensation reaction with an aromatic acid dichloride and an aromatic diamine, a two-step interfacial polymerization method, etc., and can be obtained as a commercial product. However, the present invention is not limited to this. Among these aramids, polymetaphenylene isophthalamide is preferable in that it has good molding processability, flame retardancy, heat resistance, and the like.
（アラミドファイブリッド）
本発明においてアラミドファイブリッドとは、アラミドからなるフィルム状微小粒子で、アラミドパルプと称することもある。製造方法は、例えば特公昭３５－１１８５１号、特公昭３７－５７３２号公報等に記載の方法が例示される。アラミドファイブリッドは、通常の木材パルプと同じように抄紙性を有するため、水中分散した後、抄紙機にてシート状に成形することができる。この場合、抄紙に適した品質を保つ目的でいわゆる叩解処理を施すことができる。この叩解処理は、ディスクリファイナー、ビーター、その他の機械的切断作用を及ぼす抄紙原料処理機器によって実施することができる。この操作において、ファイブリッドの形態変化は、ＪＩＳ Ｐ８１２１に規定の濾水度（フリーネス）でモニターすることができる。
本発明において、叩解処理を施した後のアラミドファイブリッドの濾水度は、１０～３００ｃｍ3（カナディアンスタンダードフリーネス）の範囲内にあることが好ましい。３００ｃｍ3以下に濾水度を制御することにより、それから成形されるシートの強度高まる。１０ｃｍ3以上の濾水度とすることにより、投入する機械動力の利用効率を高めることができ、単位時間あたりの処理量を高めることができる。さらに、ファイブリッドの適度な微細化が実現され、バインダー機能の低下が抑制される。 (Aramid Five Brid)
In the present invention, an aramid fibrid is a film-like fine particle made of aramid and may be referred to as an aramid pulp. Examples of the production method include those described in JP-B-35-11851, JP-B-37-5732, and the like. Since aramid fibrids have paper-making properties like ordinary wood pulp, it can be formed into a sheet by a paper machine after being dispersed in water. In this case, a so-called beating process can be performed for the purpose of maintaining quality suitable for papermaking. This beating process can be performed by a disk refiner, a beater, or other papermaking raw material processing equipment that exerts a mechanical cutting action. In this operation, the shape change of the fibrid can be monitored with the freeness as defined in JIS P8121.
In the present invention, the freeness of the aramid fibrid after the beating treatment is preferably in the range of 10 to 300 cm 3 (Canadian Standard Freeness). By controlling the freeness to 300 cm 3 or less, the strength of the sheet molded therefrom is increased. By setting the freeness to 10 cm 3 or more, it is possible to increase the utilization efficiency of the mechanical power to be input, and to increase the throughput per unit time. Furthermore, moderate refinement | miniaturization of a fibrid is implement | achieved and the fall of a binder function is suppressed.
本発明においてアラミドファイブリッドとは、アラミドからなるフィルム状微小粒子で、アラミドパルプと称することもある。製造方法は、例えば特公昭３５－１１８５１号、特公昭３７－５７３２号公報等に記載の方法が例示される。アラミドファイブリッドは、通常の木材パルプと同じように抄紙性を有するため、水中分散した後、抄紙機にてシート状に成形することができる。この場合、抄紙に適した品質を保つ目的でいわゆる叩解処理を施すことができる。この叩解処理は、ディスクリファイナー、ビーター、その他の機械的切断作用を及ぼす抄紙原料処理機器によって実施することができる。この操作において、ファイブリッドの形態変化は、ＪＩＳ Ｐ８１２１に規定の濾水度（フリーネス）でモニターすることができる。
本発明において、叩解処理を施した後のアラミドファイブリッドの濾水度は、１０～３００ｃｍ3（カナディアンスタンダードフリーネス）の範囲内にあることが好ましい。３００ｃｍ3以下に濾水度を制御することにより、それから成形されるシートの強度高まる。１０ｃｍ3以上の濾水度とすることにより、投入する機械動力の利用効率を高めることができ、単位時間あたりの処理量を高めることができる。さらに、ファイブリッドの適度な微細化が実現され、バインダー機能の低下が抑制される。 (Aramid Five Brid)
In the present invention, an aramid fibrid is a film-like fine particle made of aramid and may be referred to as an aramid pulp. Examples of the production method include those described in JP-B-35-11851, JP-B-37-5732, and the like. Since aramid fibrids have paper-making properties like ordinary wood pulp, it can be formed into a sheet by a paper machine after being dispersed in water. In this case, a so-called beating process can be performed for the purpose of maintaining quality suitable for papermaking. This beating process can be performed by a disk refiner, a beater, or other papermaking raw material processing equipment that exerts a mechanical cutting action. In this operation, the shape change of the fibrid can be monitored with the freeness as defined in JIS P8121.
In the present invention, the freeness of the aramid fibrid after the beating treatment is preferably in the range of 10 to 300 cm 3 (Canadian Standard Freeness). By controlling the freeness to 300 cm 3 or less, the strength of the sheet molded therefrom is increased. By setting the freeness to 10 cm 3 or more, it is possible to increase the utilization efficiency of the mechanical power to be input, and to increase the throughput per unit time. Furthermore, moderate refinement | miniaturization of a fibrid is implement | achieved and the fall of a binder function is suppressed.
（アラミド短繊維）
本発明においてアラミド短繊維とは、アラミドを原料とする繊維を所定の長さに切断したものであり、そのような繊維としては、例えば、デュポン社の「ノーメックス（登録商標）」、「ケブラー（登録商標）」、帝人（株）の「コーネックス（登録商標）」、「テクノーラ（登録商標）」などが例示できるが、これらに限定されるものではない。
アラミド短繊維は、好ましくは、０．０５ｄｔｅｘ以上２５ｄｔｅｘ未満の範囲内の繊度を有することができる。繊度が０．０５ｄｔｅｘ以上の繊維は、湿式法での製造（後述）において凝集が生じにくく、また、繊度が２５ｄｔｅｘ未満の繊維は、繊維直径が適度な大きさとなる。例えば、真円形状で密度を１．４ｇ／ｃｍ とすると、直径４５ミクロン以上である場合、アスペクト比の低下、力学的補強効果の低減、アラミド紙の均一性不良が生じるおそれがある。
アラミド短繊維の長さは、１ｍｍ以上２５ｍｍ未満の範囲から選ぶことが好ましい。短繊維の長さが１ｍｍ以上であると、アラミド紙の力学特性が十分なものとなり、２５ｍｍ未満であると、後述する湿式法でのアラミド紙の製造に際して「からみ」「結束」などの発生を抑制できる。 (Aramid short fiber)
In the present invention, the aramid short fiber is obtained by cutting a fiber made of aramid into a predetermined length. Examples of such a fiber include DuPont's “Nomex (registered trademark)”, “Kevlar ( Registered trademark), Teijin's "Conex (registered trademark)", "Technola (registered trademark)", and the like, but are not limited thereto.
The aramid short fibers can preferably have a fineness within a range of 0.05 dtex or more and less than 25 dtex. Fibers having a fineness of 0.05 dtex or more are less likely to agglomerate during production by a wet method (described later), and fibers having a fineness of less than 25 dtex have an appropriate fiber diameter. For example, when the density is 1.4 g / cm with a perfect circle shape, when the diameter is 45 microns or more, the aspect ratio may be reduced, the mechanical reinforcement effect may be reduced, and the uniformity of the aramid paper may be deteriorated.
The length of the aramid short fibers is preferably selected from the range of 1 mm or more and less than 25 mm. If the length of the short fiber is 1 mm or more, the mechanical properties of the aramid paper will be sufficient, and if it is less than 25 mm, the occurrence of “entanglement” and “binding” will occur during the production of the aramid paper by the wet method described later. Can be suppressed.
本発明においてアラミド短繊維とは、アラミドを原料とする繊維を所定の長さに切断したものであり、そのような繊維としては、例えば、デュポン社の「ノーメックス（登録商標）」、「ケブラー（登録商標）」、帝人（株）の「コーネックス（登録商標）」、「テクノーラ（登録商標）」などが例示できるが、これらに限定されるものではない。
アラミド短繊維は、好ましくは、０．０５ｄｔｅｘ以上２５ｄｔｅｘ未満の範囲内の繊度を有することができる。繊度が０．０５ｄｔｅｘ以上の繊維は、湿式法での製造（後述）において凝集が生じにくく、また、繊度が２５ｄｔｅｘ未満の繊維は、繊維直径が適度な大きさとなる。例えば、真円形状で密度を１．４ｇ／ｃｍ とすると、直径４５ミクロン以上である場合、アスペクト比の低下、力学的補強効果の低減、アラミド紙の均一性不良が生じるおそれがある。
アラミド短繊維の長さは、１ｍｍ以上２５ｍｍ未満の範囲から選ぶことが好ましい。短繊維の長さが１ｍｍ以上であると、アラミド紙の力学特性が十分なものとなり、２５ｍｍ未満であると、後述する湿式法でのアラミド紙の製造に際して「からみ」「結束」などの発生を抑制できる。 (Aramid short fiber)
In the present invention, the aramid short fiber is obtained by cutting a fiber made of aramid into a predetermined length. Examples of such a fiber include DuPont's “Nomex (registered trademark)”, “Kevlar ( Registered trademark), Teijin's "Conex (registered trademark)", "Technola (registered trademark)", and the like, but are not limited thereto.
The aramid short fibers can preferably have a fineness within a range of 0.05 dtex or more and less than 25 dtex. Fibers having a fineness of 0.05 dtex or more are less likely to agglomerate during production by a wet method (described later), and fibers having a fineness of less than 25 dtex have an appropriate fiber diameter. For example, when the density is 1.4 g / cm with a perfect circle shape, when the diameter is 45 microns or more, the aspect ratio may be reduced, the mechanical reinforcement effect may be reduced, and the uniformity of the aramid paper may be deteriorated.
The length of the aramid short fibers is preferably selected from the range of 1 mm or more and less than 25 mm. If the length of the short fiber is 1 mm or more, the mechanical properties of the aramid paper will be sufficient, and if it is less than 25 mm, the occurrence of “entanglement” and “binding” will occur during the production of the aramid paper by the wet method described later. Can be suppressed.
（アラミド紙）
本発明においてアラミド紙とは、前記のアラミドファイブリッド及びアラミド短繊維を主として構成されるシート状物であり、一般に２０μｍ～１０００μｍの厚さ、好ましくは２５μｍ～５００μｍの厚さ、より好ましくは３０μｍ～１００μｍの厚さを有している。
さらにアラミド紙は、一般に１０ｇ／ｍ2～１０００ｇ／ｍ2の坪量、好ましくは１５ｇ／ｍ2～４００ｇ／ｍ2の坪量、より好ましくは２０ｇ／ｍ2～１００ｇ／ｍ2の坪量を有している。ここで、アラミドファイブリッドとアラミド短繊維の混合割合は任意とすることができるが、アラミドファイブリッド／アラミド短繊維の割合（質量比）を１／９～９／１とするのが好ましく、より好ましくは２／８～８／２であるが、この範囲に限定されるものではない。
アラミド紙は、一般に、前述したアラミドファイブリッドとアラミド短繊維とを混合した後シート化する方法により製造される。具体的には、例えば上記アラミドファイブリッド及びアラミド短繊維を乾式ブレンドした後に、気流を利用してシートを形成する方法、アラミドファイブリッド及びアラミド短繊維を液体媒体中で分散混合した後、液体透過性の支持体、例えば網またはベルト上に吐出してシート化し、液体を除いて乾燥する方法などが適用できるが、これらのなかでも水を媒体として使用する、いわゆる湿式抄造法が好ましく選択される。
湿式抄造法では、少なくともアラミドファイブリッド、アラミド短繊維を含有する単一または混合物の水性スラリーを、抄紙機に送液し分散した後、脱水、搾水及び乾燥することによって、シートとして巻き取る方法が一般的である。抄紙機としては長網抄紙機、円網抄紙機、傾斜型抄紙機及びこれらを組み合わせたコンビネーション抄紙機などが利用される。コンビネーション抄紙機での製造の場合、配合比率の異なるスラリーをシート成形し合一することで複数の紙層からなる複合体シートを得ることができる。抄造の際に必要に応じて分散性向上剤、消泡剤、紙力増強剤などの添加剤が使用される。
上記のようにして得られたアラミド紙は、一対のロール間にて高温高圧で熱圧することにより、密度、機械強度を向上することができる。熱圧の条件は、たとえば金属製ロール使用の場合、温度１００～４００℃、線圧５０～４００ｋｇ／ｃｍの範囲内を例示することができるが、これらに限定されるものではない。熱圧の際に複数のアラミド紙を積層することもできる。上記の熱圧加工を任意の順に複数回行うこともできる。 (Aramid paper)
In the present invention, the aramid paper is a sheet-like material mainly composed of the aramid fibrid and the aramid short fiber, and generally has a thickness of 20 μm to 1000 μm, preferably 25 μm to 500 μm, more preferably 30 μm to It has a thickness of 100 μm.
Furthermore, the aramid paper generally has a basis weight of 10 g / m 2 to 1000 g / m 2 , preferably 15 g / m 2 to 400 g / m 2 , more preferably 20 g / m 2 to 100 g / m 2. Have. Here, the mixing ratio of the aramid fibrid and the aramid short fiber can be arbitrary, but the ratio (mass ratio) of the aramid fibrid / aramid short fiber is preferably 1/9 to 9/1, more Although it is preferably 2/8 to 8/2, it is not limited to this range.
Aramid paper is generally produced by a method of mixing the above-mentioned aramid fibrid and aramid short fibers and then forming a sheet. Specifically, for example, after dry blending the aramid fibrid and the aramid short fiber, a method of forming a sheet using an air flow, after the aramid fibrid and the aramid short fiber are dispersed and mixed in a liquid medium, the liquid permeation is performed. For example, a so-called wet papermaking method using water as a medium is preferably selected. .
In the wet papermaking method, a single or mixed aqueous slurry containing at least aramid fibrids and aramid short fibers is fed to a paper machine and dispersed, then dewatered, squeezed and dried to be wound as a sheet. Is common. As the paper machine, a long paper machine, a circular paper machine, an inclined paper machine, and a combination paper machine combining these are used. In the case of production with a combination paper machine, a composite sheet composed of a plurality of paper layers can be obtained by forming and combining slurry having different blending ratios. Additives such as a dispersibility improver, an antifoaming agent, and a paper strength enhancer are used as necessary during papermaking.
The aramid paper obtained as described above can be improved in density and mechanical strength by hot pressing at high temperature and high pressure between a pair of rolls. Examples of the hot pressure conditions include, but are not limited to, when using a metal roll, a temperature of 100 to 400 ° C. and a linear pressure of 50 to 400 kg / cm. A plurality of aramid papers can be laminated during hot pressing. The above hot pressing can be performed a plurality of times in an arbitrary order.
本発明においてアラミド紙とは、前記のアラミドファイブリッド及びアラミド短繊維を主として構成されるシート状物であり、一般に２０μｍ～１０００μｍの厚さ、好ましくは２５μｍ～５００μｍの厚さ、より好ましくは３０μｍ～１００μｍの厚さを有している。
さらにアラミド紙は、一般に１０ｇ／ｍ2～１０００ｇ／ｍ2の坪量、好ましくは１５ｇ／ｍ2～４００ｇ／ｍ2の坪量、より好ましくは２０ｇ／ｍ2～１００ｇ／ｍ2の坪量を有している。ここで、アラミドファイブリッドとアラミド短繊維の混合割合は任意とすることができるが、アラミドファイブリッド／アラミド短繊維の割合（質量比）を１／９～９／１とするのが好ましく、より好ましくは２／８～８／２であるが、この範囲に限定されるものではない。
アラミド紙は、一般に、前述したアラミドファイブリッドとアラミド短繊維とを混合した後シート化する方法により製造される。具体的には、例えば上記アラミドファイブリッド及びアラミド短繊維を乾式ブレンドした後に、気流を利用してシートを形成する方法、アラミドファイブリッド及びアラミド短繊維を液体媒体中で分散混合した後、液体透過性の支持体、例えば網またはベルト上に吐出してシート化し、液体を除いて乾燥する方法などが適用できるが、これらのなかでも水を媒体として使用する、いわゆる湿式抄造法が好ましく選択される。
湿式抄造法では、少なくともアラミドファイブリッド、アラミド短繊維を含有する単一または混合物の水性スラリーを、抄紙機に送液し分散した後、脱水、搾水及び乾燥することによって、シートとして巻き取る方法が一般的である。抄紙機としては長網抄紙機、円網抄紙機、傾斜型抄紙機及びこれらを組み合わせたコンビネーション抄紙機などが利用される。コンビネーション抄紙機での製造の場合、配合比率の異なるスラリーをシート成形し合一することで複数の紙層からなる複合体シートを得ることができる。抄造の際に必要に応じて分散性向上剤、消泡剤、紙力増強剤などの添加剤が使用される。
上記のようにして得られたアラミド紙は、一対のロール間にて高温高圧で熱圧することにより、密度、機械強度を向上することができる。熱圧の条件は、たとえば金属製ロール使用の場合、温度１００～４００℃、線圧５０～４００ｋｇ／ｃｍの範囲内を例示することができるが、これらに限定されるものではない。熱圧の際に複数のアラミド紙を積層することもできる。上記の熱圧加工を任意の順に複数回行うこともできる。 (Aramid paper)
In the present invention, the aramid paper is a sheet-like material mainly composed of the aramid fibrid and the aramid short fiber, and generally has a thickness of 20 μm to 1000 μm, preferably 25 μm to 500 μm, more preferably 30 μm to It has a thickness of 100 μm.
Furthermore, the aramid paper generally has a basis weight of 10 g / m 2 to 1000 g / m 2 , preferably 15 g / m 2 to 400 g / m 2 , more preferably 20 g / m 2 to 100 g / m 2. Have. Here, the mixing ratio of the aramid fibrid and the aramid short fiber can be arbitrary, but the ratio (mass ratio) of the aramid fibrid / aramid short fiber is preferably 1/9 to 9/1, more Although it is preferably 2/8 to 8/2, it is not limited to this range.
Aramid paper is generally produced by a method of mixing the above-mentioned aramid fibrid and aramid short fibers and then forming a sheet. Specifically, for example, after dry blending the aramid fibrid and the aramid short fiber, a method of forming a sheet using an air flow, after the aramid fibrid and the aramid short fiber are dispersed and mixed in a liquid medium, the liquid permeation is performed. For example, a so-called wet papermaking method using water as a medium is preferably selected. .
In the wet papermaking method, a single or mixed aqueous slurry containing at least aramid fibrids and aramid short fibers is fed to a paper machine and dispersed, then dewatered, squeezed and dried to be wound as a sheet. Is common. As the paper machine, a long paper machine, a circular paper machine, an inclined paper machine, and a combination paper machine combining these are used. In the case of production with a combination paper machine, a composite sheet composed of a plurality of paper layers can be obtained by forming and combining slurry having different blending ratios. Additives such as a dispersibility improver, an antifoaming agent, and a paper strength enhancer are used as necessary during papermaking.
The aramid paper obtained as described above can be improved in density and mechanical strength by hot pressing at high temperature and high pressure between a pair of rolls. Examples of the hot pressure conditions include, but are not limited to, when using a metal roll, a temperature of 100 to 400 ° C. and a linear pressure of 50 to 400 kg / cm. A plurality of aramid papers can be laminated during hot pressing. The above hot pressing can be performed a plurality of times in an arbitrary order.
（樹脂フィルム）
本発明において樹脂フィルムとしてはポリエチレンテレフタレートフィルム、ポリエチレンナフタレートフィルム、ポリフェニレンサルファイドフィルムを用いることができる。樹脂フィルムは、好ましくは常温において６０％以上の破断伸度、より好ましくは１００％以上の破断伸度、さらに好ましくは１５０％以上の破断伸度を有しており、厚さは特に限定されないが好ましくは１０μｍ～１０００μｍ、より好ましくは２０μｍ～６００μｍ、より好ましくは３０μｍ～２００μｍ、より好ましくは３０μｍ～１００μｍである。そのようなフィルムとしては、例えば、帝人デュポンフィルム（株）の「テフレックス（登録商標）」、「テイジン（登録商標）テトロン（登録商標）、フィルム」、「テオネックス（登録商標）」や東レ（株）の「トレリナ（登録商標）フィルム」などが例示できるが、これらに限定されるものではない。 (Resin film)
In the present invention, a polyethylene terephthalate film, a polyethylene naphthalate film, or a polyphenylene sulfide film can be used as the resin film. The resin film preferably has a breaking elongation of 60% or more at normal temperature, more preferably 100% or more, and even more preferably 150% or more, and the thickness is not particularly limited. The thickness is preferably 10 μm to 1000 μm, more preferably 20 μm to 600 μm, more preferably 30 μm to 200 μm, and more preferably 30 μm to 100 μm. Such films include, for example, “Teflex (registered trademark)”, “Teijin (registered trademark) Tetron (registered trademark), film”, “Teonex (registered trademark)”, Toray ( "Torelina (registered trademark) film" of the company etc. can be illustrated, but is not limited to these.
本発明において樹脂フィルムとしてはポリエチレンテレフタレートフィルム、ポリエチレンナフタレートフィルム、ポリフェニレンサルファイドフィルムを用いることができる。樹脂フィルムは、好ましくは常温において６０％以上の破断伸度、より好ましくは１００％以上の破断伸度、さらに好ましくは１５０％以上の破断伸度を有しており、厚さは特に限定されないが好ましくは１０μｍ～１０００μｍ、より好ましくは２０μｍ～６００μｍ、より好ましくは３０μｍ～２００μｍ、より好ましくは３０μｍ～１００μｍである。そのようなフィルムとしては、例えば、帝人デュポンフィルム（株）の「テフレックス（登録商標）」、「テイジン（登録商標）テトロン（登録商標）、フィルム」、「テオネックス（登録商標）」や東レ（株）の「トレリナ（登録商標）フィルム」などが例示できるが、これらに限定されるものではない。 (Resin film)
In the present invention, a polyethylene terephthalate film, a polyethylene naphthalate film, or a polyphenylene sulfide film can be used as the resin film. The resin film preferably has a breaking elongation of 60% or more at normal temperature, more preferably 100% or more, and even more preferably 150% or more, and the thickness is not particularly limited. The thickness is preferably 10 μm to 1000 μm, more preferably 20 μm to 600 μm, more preferably 30 μm to 200 μm, and more preferably 30 μm to 100 μm. Such films include, for example, “Teflex (registered trademark)”, “Teijin (registered trademark) Tetron (registered trademark), film”, “Teonex (registered trademark)”, Toray ( "Torelina (registered trademark) film" of the company etc. can be illustrated, but is not limited to these.
（回転子、固定子）
モータは回転子と固定子間の磁気的反発を利用して、電気エネルギーを力学エネルギーに変換する装置である。その種類は形状や構造、用いる電源によって多岐に渡るが、自動車等の駆動モータや小型モータにおいては回転子もしくは固定子のスロットにコイルを導入し、電流を流すことで回転子を回転させる方式が広く用いられている。回転子や固定子には金属導体や磁石が用いられるが、特に渦電流損を低減するために薄い鋼板を積層させた金属板の積層体が用いられる。積層させた金属板を固定する方法には、各金属板に接着剤を塗布して接着する方法や、積層体の軸方向に力を加えてかしめることで一体化させる方法などがある。
また、コイルを保護すると同時に、漏れ電流を抑制するために、コイル－固定子間もしくはコイル－回転子間には絶縁層を設ける必要がある。印加される電圧や発生する熱量によって最適な絶縁層が選択される。本発明においては、複数の金属板積層体に対してアラミド紙と樹脂フィルムとを含む積層絶縁シートを用いる。 (Rotor, stator)
A motor is a device that converts electrical energy into mechanical energy using magnetic repulsion between a rotor and a stator. There are a wide variety of types depending on the shape, structure, and power source used, but in drive motors and small motors such as automobiles, there is a method of rotating the rotor by introducing a coil into the rotor or stator slot and passing an electric current. Widely used. A metal conductor or a magnet is used for the rotor or the stator, but a metal plate laminate in which thin steel plates are laminated is used in order to reduce eddy current loss. As a method of fixing the laminated metal plates, there are a method of applying and bonding an adhesive to each metal plate, and a method of integrating by applying force in the axial direction of the laminated body.
Further, in order to protect the coil and suppress the leakage current, it is necessary to provide an insulating layer between the coil and the stator or between the coil and the rotor. The optimum insulating layer is selected depending on the applied voltage and the amount of heat generated. In the present invention, a laminated insulating sheet containing aramid paper and a resin film is used for a plurality of metal plate laminates.
モータは回転子と固定子間の磁気的反発を利用して、電気エネルギーを力学エネルギーに変換する装置である。その種類は形状や構造、用いる電源によって多岐に渡るが、自動車等の駆動モータや小型モータにおいては回転子もしくは固定子のスロットにコイルを導入し、電流を流すことで回転子を回転させる方式が広く用いられている。回転子や固定子には金属導体や磁石が用いられるが、特に渦電流損を低減するために薄い鋼板を積層させた金属板の積層体が用いられる。積層させた金属板を固定する方法には、各金属板に接着剤を塗布して接着する方法や、積層体の軸方向に力を加えてかしめることで一体化させる方法などがある。
また、コイルを保護すると同時に、漏れ電流を抑制するために、コイル－固定子間もしくはコイル－回転子間には絶縁層を設ける必要がある。印加される電圧や発生する熱量によって最適な絶縁層が選択される。本発明においては、複数の金属板積層体に対してアラミド紙と樹脂フィルムとを含む積層絶縁シートを用いる。 (Rotor, stator)
A motor is a device that converts electrical energy into mechanical energy using magnetic repulsion between a rotor and a stator. There are a wide variety of types depending on the shape, structure, and power source used, but in drive motors and small motors such as automobiles, there is a method of rotating the rotor by introducing a coil into the rotor or stator slot and passing an electric current. Widely used. A metal conductor or a magnet is used for the rotor or the stator, but a metal plate laminate in which thin steel plates are laminated is used in order to reduce eddy current loss. As a method of fixing the laminated metal plates, there are a method of applying and bonding an adhesive to each metal plate, and a method of integrating by applying force in the axial direction of the laminated body.
Further, in order to protect the coil and suppress the leakage current, it is necessary to provide an insulating layer between the coil and the stator or between the coil and the rotor. The optimum insulating layer is selected depending on the applied voltage and the amount of heat generated. In the present invention, a laminated insulating sheet containing aramid paper and a resin film is used for a plurality of metal plate laminates.
（スキュー）
直流モータにおいてスロットが回転軸に対して平行な場合、回転子の位置によって回転方向のトルクにばらつきが生じ、モータの騒音や振動を引き起こす場合がある。スロットを回転軸に対して角度を付けることによって、コイルに電流を流すことによって発生する電磁力が広い範囲に分散するため、回転時のトルクのばらつきを低減することが可能である。このようにスロットの回転軸に対して角度がついた斜めのスロットの状態のことをスキューと呼ぶ。回転子や固定子へのスキューの付与の方法は大きく分けて二つある。
一つは金属板を積層する際に所定の角度ずつ回転させて積層させ、各層を固定化することによってスキューを付与する方法である。この場合、コイルの挿入はスキューが形成された後になされる。スキュー付与のもう一つの方法は金属板をずらさずに積層させた後に各積層板をずらすことでスキューを付与する方法である。積層板をずらす方法には、一定角度ずつ回転するように、各積層板にあらかじめ凹凸を形成しておき、積層後に最上層と最下層にひねりを生じさせる方法や、積層させたすべての積層板にピンを貫通させて一定角度の傾きを与えることで各積層板をずらす方法がある。この場合、コイルの挿入はスキューを付与する前に行っても後に行ってもいずれでも良い。
本発明では、金属板をずらさずに積層させた後に積層絶縁シートを金属板積層体のスロットへ挿入し、次いで各積層板をずらすことでスキューを導入することができる。
以下、本発明を、実施例を挙げてさらに具体的に説明する。なお、これらの実施例は、単なる例示であり、本発明の内容を何ら限定するためのものではない。 (Skew)
In a DC motor, when the slot is parallel to the rotation axis, the torque in the rotational direction varies depending on the position of the rotor, which may cause noise and vibration of the motor. By angling the slot with respect to the rotation axis, the electromagnetic force generated by passing a current through the coil is dispersed over a wide range, so that it is possible to reduce the variation in torque during rotation. The state of the slanted slot having an angle with respect to the rotation axis of the slot is called skew. There are roughly two methods for imparting skew to the rotor and stator.
One is a method of imparting skew by rotating and laminating metal plates by a predetermined angle and fixing each layer. In this case, the coil is inserted after the skew is formed. Another method of imparting skew is a method of imparting skew by shifting each laminated plate after laminating metal plates without shifting. The method of shifting the laminated plates is to form irregularities on each laminated plate in advance so that it rotates by a certain angle, and then twisting the uppermost layer and the lowermost layer after lamination, or all laminated laminates There is a method of shifting each laminated plate by passing a pin through and giving a certain angle of inclination. In this case, the coil may be inserted before or after the skew is applied.
In the present invention, after laminating the metal plates without shifting, it is possible to introduce a skew by inserting the laminated insulating sheet into the slot of the metal plate laminate and then shifting each laminated plate.
Hereinafter, the present invention will be described more specifically with reference to examples. These examples are merely illustrative and are not intended to limit the content of the present invention.
直流モータにおいてスロットが回転軸に対して平行な場合、回転子の位置によって回転方向のトルクにばらつきが生じ、モータの騒音や振動を引き起こす場合がある。スロットを回転軸に対して角度を付けることによって、コイルに電流を流すことによって発生する電磁力が広い範囲に分散するため、回転時のトルクのばらつきを低減することが可能である。このようにスロットの回転軸に対して角度がついた斜めのスロットの状態のことをスキューと呼ぶ。回転子や固定子へのスキューの付与の方法は大きく分けて二つある。
一つは金属板を積層する際に所定の角度ずつ回転させて積層させ、各層を固定化することによってスキューを付与する方法である。この場合、コイルの挿入はスキューが形成された後になされる。スキュー付与のもう一つの方法は金属板をずらさずに積層させた後に各積層板をずらすことでスキューを付与する方法である。積層板をずらす方法には、一定角度ずつ回転するように、各積層板にあらかじめ凹凸を形成しておき、積層後に最上層と最下層にひねりを生じさせる方法や、積層させたすべての積層板にピンを貫通させて一定角度の傾きを与えることで各積層板をずらす方法がある。この場合、コイルの挿入はスキューを付与する前に行っても後に行ってもいずれでも良い。
本発明では、金属板をずらさずに積層させた後に積層絶縁シートを金属板積層体のスロットへ挿入し、次いで各積層板をずらすことでスキューを導入することができる。
以下、本発明を、実施例を挙げてさらに具体的に説明する。なお、これらの実施例は、単なる例示であり、本発明の内容を何ら限定するためのものではない。 (Skew)
In a DC motor, when the slot is parallel to the rotation axis, the torque in the rotational direction varies depending on the position of the rotor, which may cause noise and vibration of the motor. By angling the slot with respect to the rotation axis, the electromagnetic force generated by passing a current through the coil is dispersed over a wide range, so that it is possible to reduce the variation in torque during rotation. The state of the slanted slot having an angle with respect to the rotation axis of the slot is called skew. There are roughly two methods for imparting skew to the rotor and stator.
One is a method of imparting skew by rotating and laminating metal plates by a predetermined angle and fixing each layer. In this case, the coil is inserted after the skew is formed. Another method of imparting skew is a method of imparting skew by shifting each laminated plate after laminating metal plates without shifting. The method of shifting the laminated plates is to form irregularities on each laminated plate in advance so that it rotates by a certain angle, and then twisting the uppermost layer and the lowermost layer after lamination, or all laminated laminates There is a method of shifting each laminated plate by passing a pin through and giving a certain angle of inclination. In this case, the coil may be inserted before or after the skew is applied.
In the present invention, after laminating the metal plates without shifting, it is possible to introduce a skew by inserting the laminated insulating sheet into the slot of the metal plate laminate and then shifting each laminated plate.
Hereinafter, the present invention will be described more specifically with reference to examples. These examples are merely illustrative and are not intended to limit the content of the present invention.
［参考例］
（原料調製）
特開昭５２－１５６２１号公報に記載のステーターとローターの組み合わせで構成されるパルプ粒子の製造装置（湿式沈殿機）を用いて、ポリメタフェニレンイソフタルアミドのファイブリッドを製造した。これを、離解機、叩解機で処理して長さ加重平均繊維長を０．９ｍｍに調節した。得られたアラミドファイブリッドの濾水度は９０ｃｍ3であった。一方、デュポン社製メタアラミド繊維（ノーメックス（登録商標）、単糸繊度２デニール）を、長さ６ｍｍに切断（以下「アラミド短繊維」と記載）した。
（アラミド紙の製造）
上記の通り調製したアラミドファイブリッドとアラミド短繊維をおのおの水中で分散しスラリーを作製した。これらのスラリーを、アラミドファイブリッドとアラミド短繊維とが１／１の配合比率（重量比）となるように混合し、タッピー式手抄き機（断面積６２５ｃｍ2）にてシート状物を作製した。アラミド紙の坪量や厚みはスラリーの投入量を変えることで調節した。次いで、これを金属製カレンダーロールにより温度３３０℃、線圧３００ｋｇ／ｃｍで熱圧加工し、表１の実施例１及び２、並びに比較例１及び２に示すアラミド紙を得た。 [Reference example]
(Raw material preparation)
A polymetaphenylene isophthalamide fibrid was produced using a pulp particle production apparatus (wet precipitation machine) composed of a combination of a stator and a rotor described in JP-A-52-15621. This was processed with a disaggregator and a beater to adjust the length weighted average fiber length to 0.9 mm. The freeness of the obtained aramid fibrid was 90 cm 3 . Meanwhile, a DuPont meta-aramid fiber (Nomex (registered trademark),single yarn fineness 2 denier) was cut into a length of 6 mm (hereinafter referred to as “aramid short fiber”).
(Manufacture of aramid paper)
Aramid fibrids and aramid short fibers prepared as described above were each dispersed in water to prepare a slurry. These slurries are mixed so that the blend ratio (weight ratio) of aramid fibrids and aramid short fibers is 1/1, and a sheet-like material is produced by a tappy hand-making machine (cross-sectional area of 625 cm 2 ). did. The basis weight and thickness of the aramid paper were adjusted by changing the amount of slurry added. Next, this was hot-pressed with a metal calender roll at a temperature of 330 ° C. and a linear pressure of 300 kg / cm to obtain aramid paper shown in Examples 1 and 2 of Table 1 and Comparative Examples 1 and 2.
（原料調製）
特開昭５２－１５６２１号公報に記載のステーターとローターの組み合わせで構成されるパルプ粒子の製造装置（湿式沈殿機）を用いて、ポリメタフェニレンイソフタルアミドのファイブリッドを製造した。これを、離解機、叩解機で処理して長さ加重平均繊維長を０．９ｍｍに調節した。得られたアラミドファイブリッドの濾水度は９０ｃｍ3であった。一方、デュポン社製メタアラミド繊維（ノーメックス（登録商標）、単糸繊度２デニール）を、長さ６ｍｍに切断（以下「アラミド短繊維」と記載）した。
（アラミド紙の製造）
上記の通り調製したアラミドファイブリッドとアラミド短繊維をおのおの水中で分散しスラリーを作製した。これらのスラリーを、アラミドファイブリッドとアラミド短繊維とが１／１の配合比率（重量比）となるように混合し、タッピー式手抄き機（断面積６２５ｃｍ2）にてシート状物を作製した。アラミド紙の坪量や厚みはスラリーの投入量を変えることで調節した。次いで、これを金属製カレンダーロールにより温度３３０℃、線圧３００ｋｇ／ｃｍで熱圧加工し、表１の実施例１及び２、並びに比較例１及び２に示すアラミド紙を得た。 [Reference example]
(Raw material preparation)
A polymetaphenylene isophthalamide fibrid was produced using a pulp particle production apparatus (wet precipitation machine) composed of a combination of a stator and a rotor described in JP-A-52-15621. This was processed with a disaggregator and a beater to adjust the length weighted average fiber length to 0.9 mm. The freeness of the obtained aramid fibrid was 90 cm 3 . Meanwhile, a DuPont meta-aramid fiber (Nomex (registered trademark),
(Manufacture of aramid paper)
Aramid fibrids and aramid short fibers prepared as described above were each dispersed in water to prepare a slurry. These slurries are mixed so that the blend ratio (weight ratio) of aramid fibrids and aramid short fibers is 1/1, and a sheet-like material is produced by a tappy hand-making machine (cross-sectional area of 625 cm 2 ). did. The basis weight and thickness of the aramid paper were adjusted by changing the amount of slurry added. Next, this was hot-pressed with a metal calender roll at a temperature of 330 ° C. and a linear pressure of 300 kg / cm to obtain aramid paper shown in Examples 1 and 2 of Table 1 and Comparative Examples 1 and 2.
［実施例１］
［参考例］に記載の方法によって作成したアラミド紙（坪量：２７．２ｇ／ｍ2、厚み：０．０４２ｍｍ、密度：０．６４ｇ／ｃｍ3）及びポリエチレンテレフタレートフィルム（帝人デュポンフィルム（株）製「テフレックス（登録商標）ＦＴ、厚み５０μｍ」、常温における破断伸度２２０％）を接着剤で貼り合わせてアラミド紙－ポリエチレンテレフタレートフィルム－アラミド紙の３層積層体を得た。このようにして得られた積層体の主要特性を下記の方法で評価した。
［測定方法］
（１）坪量、厚み、密度
ＪＩＳ Ｃ ２３２３－２に準じて実施し、密度は（坪量／厚み）により算出した。
（２）引張強度、常温における破断伸度
ＪＩＳ Ｃ ２３２３－２に準じて実施した。
（３）スキュー形成時の破断
スキュー時の伸びはモータの回転子を模した金属板積層体モデルを使用して測定した。金属板積層体モデルは、図１に表すとおり、厚さ２ｍｍ、直径１００ｍｍのステンレス製円盤を５０枚積層させ、その中央部にズレ防止のための心棒３、下部に土台６、上部にハンドル５付き上蓋４をそれぞれ備える。各金属板には円周の同一位置にスロット２を備えている。スロット２の上側の上蓋４および下側の土台６には、ビス穴７が形成されている。
上部のハンドル５を円周方向に回転することで、上蓋４に接続された回転用柱が各金属板を同一角度ずつ回転させることで、スキューを形成した。穴９を開けた短冊状積層絶縁シート８をスロット２の曲面に沿わせるように挿入し、積層絶縁シートの穴９と上蓋４および土台６の穴７に合わせビスとワッシャーによって固定した。ハンドルを６０°まで回転させることで積層絶縁シート８の破断の有無を調査した。 [Example 1]
Aramid paper (basis weight: 27.2 g / m 2 , thickness: 0.042 mm, density: 0.64 g / cm 3 ) and polyethylene terephthalate film (Teijin DuPont Films Ltd.) prepared by the method described in Reference Example “Teflex (registered trademark) FT, thickness 50 μm”, elongation at break at room temperature 220%) was bonded together with an adhesive to obtain a three-layer laminate of aramid paper-polyethylene terephthalate film-aramid paper. The main characteristics of the laminate thus obtained were evaluated by the following methods.
[Measuring method]
(1) Basis weight, thickness, density Carried out according to JIS C 2323-2, and the density was calculated by (basis weight / thickness).
(2) Tensile strength, elongation at break at normal temperature Measured according to JIS C 2323-2.
(3) Break at the time of skew formation The elongation at the time of skew was measured using a metal plate laminate model simulating a rotor of a motor. As shown in FIG. 1, the metal plate laminate model is formed by stacking 50 stainless steel discs having a thickness of 2 mm and a diameter of 100 mm, amandrel 3 for preventing displacement at the center, a base 6 at the bottom, and a handle 5 at the top. A top cover 4 is provided. Each metal plate is provided with a slot 2 at the same position on the circumference. Screw holes 7 are formed in the upper lid 4 and the lower base 6 on the upper side of the slot 2.
By rotating theupper handle 5 in the circumferential direction, a rotation column connected to the upper lid 4 rotates each metal plate by the same angle, thereby forming a skew. The strip-shaped laminated insulating sheet 8 with holes 9 was inserted along the curved surface of the slot 2 and fixed with screws and washers in accordance with the holes 9 of the laminated insulating sheet, the upper lid 4 and the holes 7 of the base 6. The presence or absence of breakage of the laminated insulating sheet 8 was investigated by rotating the handle to 60 °.
［参考例］に記載の方法によって作成したアラミド紙（坪量：２７．２ｇ／ｍ2、厚み：０．０４２ｍｍ、密度：０．６４ｇ／ｃｍ3）及びポリエチレンテレフタレートフィルム（帝人デュポンフィルム（株）製「テフレックス（登録商標）ＦＴ、厚み５０μｍ」、常温における破断伸度２２０％）を接着剤で貼り合わせてアラミド紙－ポリエチレンテレフタレートフィルム－アラミド紙の３層積層体を得た。このようにして得られた積層体の主要特性を下記の方法で評価した。
［測定方法］
（１）坪量、厚み、密度
ＪＩＳ Ｃ ２３２３－２に準じて実施し、密度は（坪量／厚み）により算出した。
（２）引張強度、常温における破断伸度
ＪＩＳ Ｃ ２３２３－２に準じて実施した。
（３）スキュー形成時の破断
スキュー時の伸びはモータの回転子を模した金属板積層体モデルを使用して測定した。金属板積層体モデルは、図１に表すとおり、厚さ２ｍｍ、直径１００ｍｍのステンレス製円盤を５０枚積層させ、その中央部にズレ防止のための心棒３、下部に土台６、上部にハンドル５付き上蓋４をそれぞれ備える。各金属板には円周の同一位置にスロット２を備えている。スロット２の上側の上蓋４および下側の土台６には、ビス穴７が形成されている。
上部のハンドル５を円周方向に回転することで、上蓋４に接続された回転用柱が各金属板を同一角度ずつ回転させることで、スキューを形成した。穴９を開けた短冊状積層絶縁シート８をスロット２の曲面に沿わせるように挿入し、積層絶縁シートの穴９と上蓋４および土台６の穴７に合わせビスとワッシャーによって固定した。ハンドルを６０°まで回転させることで積層絶縁シート８の破断の有無を調査した。 [Example 1]
Aramid paper (basis weight: 27.2 g / m 2 , thickness: 0.042 mm, density: 0.64 g / cm 3 ) and polyethylene terephthalate film (Teijin DuPont Films Ltd.) prepared by the method described in Reference Example “Teflex (registered trademark) FT, thickness 50 μm”, elongation at break at room temperature 220%) was bonded together with an adhesive to obtain a three-layer laminate of aramid paper-polyethylene terephthalate film-aramid paper. The main characteristics of the laminate thus obtained were evaluated by the following methods.
[Measuring method]
(1) Basis weight, thickness, density Carried out according to JIS C 2323-2, and the density was calculated by (basis weight / thickness).
(2) Tensile strength, elongation at break at normal temperature Measured according to JIS C 2323-2.
(3) Break at the time of skew formation The elongation at the time of skew was measured using a metal plate laminate model simulating a rotor of a motor. As shown in FIG. 1, the metal plate laminate model is formed by stacking 50 stainless steel discs having a thickness of 2 mm and a diameter of 100 mm, a
By rotating the
［実施例２］
［参考例］に記載の方法によって作製したアラミド紙（坪量：４１．２ｇ／ｍ2、厚み：０．０５８ｍｍ、密度：０．７１ｇ／ｃｍ3）及びポリエチレンテレフタレートフィルム（帝人デュポンフィルム（株）製「テフレックス（登録商標）ＦＴ、厚み８０μｍ」、常温における破断伸度２２０％）を接着剤で貼り合わせてアラミド紙－ポリエチレンテレフタレートフィルムの２層積層体を得た。このようにして得られた積層体の主要特性を実施例１と同様の方法で評価した。 [Example 2]
Aramid paper (basis weight: 41.2 g / m 2 , thickness: 0.058 mm, density: 0.71 g / cm 3 ) and polyethylene terephthalate film (Teijin DuPont Films Ltd.) produced by the method described in Reference Example “Teflex (registered trademark) FT, thickness: 80 μm”, elongation at break at room temperature: 220%) was bonded with an adhesive to obtain a two-layer laminate of an aramid paper-polyethylene terephthalate film. The main characteristics of the laminate thus obtained were evaluated in the same manner as in Example 1.
［参考例］に記載の方法によって作製したアラミド紙（坪量：４１．２ｇ／ｍ2、厚み：０．０５８ｍｍ、密度：０．７１ｇ／ｃｍ3）及びポリエチレンテレフタレートフィルム（帝人デュポンフィルム（株）製「テフレックス（登録商標）ＦＴ、厚み８０μｍ」、常温における破断伸度２２０％）を接着剤で貼り合わせてアラミド紙－ポリエチレンテレフタレートフィルムの２層積層体を得た。このようにして得られた積層体の主要特性を実施例１と同様の方法で評価した。 [Example 2]
Aramid paper (basis weight: 41.2 g / m 2 , thickness: 0.058 mm, density: 0.71 g / cm 3 ) and polyethylene terephthalate film (Teijin DuPont Films Ltd.) produced by the method described in Reference Example “Teflex (registered trademark) FT, thickness: 80 μm”, elongation at break at room temperature: 220%) was bonded with an adhesive to obtain a two-layer laminate of an aramid paper-polyethylene terephthalate film. The main characteristics of the laminate thus obtained were evaluated in the same manner as in Example 1.
［比較例１］
［参考例］に記載の方法によって作製したアラミド紙（坪量：１１５ｇ／ｍ2、厚み：０．１３４ｍｍ、密度：０．８６ｇ／ｃｍ3）を単体で、実施例１と同様に評価した。
実施例１および２、並びに比較例１について、スキュー形成時の破断の結果を表１に示した。表１に示されるように、アラミド紙にポリエチレンテレフタレートフィルムを貼り合わせることで、同等の厚みを有するアラミド紙単体と比較して破断時の伸びが大きく改善することが判明した。上記の結果より、スキュー付の金属板積層体に絶縁シートを適応する場合には実施例に示されるような、伸びの大きな絶縁シートを用いることが有効であると考えられる。得られた３層絶縁シートは表面にアラミド紙を配した構造であるため、高耐熱性が要求されるモータの回転子や固定子への利用が期待される。 [Comparative Example 1]
Aramid paper (basis weight: 115 g / m 2 , thickness: 0.134 mm, density: 0.86 g / cm 3 ) produced by the method described in [Reference Example] was evaluated in the same manner as in Example 1 alone.
Table 1 shows the results of breakage at the time of skew formation for Examples 1 and 2 and Comparative Example 1. As shown in Table 1, it has been found that by bonding a polyethylene terephthalate film to aramid paper, the elongation at break is greatly improved as compared to a single aramid paper having the same thickness. From the above results, when applying an insulating sheet to a skewed metal plate laminate, it is considered effective to use an insulating sheet having a large elongation as shown in the examples. Since the obtained three-layer insulating sheet has a structure in which aramid paper is provided on the surface, it is expected to be used for a rotor or a stator of a motor that requires high heat resistance.
［参考例］に記載の方法によって作製したアラミド紙（坪量：１１５ｇ／ｍ2、厚み：０．１３４ｍｍ、密度：０．８６ｇ／ｃｍ3）を単体で、実施例１と同様に評価した。
実施例１および２、並びに比較例１について、スキュー形成時の破断の結果を表１に示した。表１に示されるように、アラミド紙にポリエチレンテレフタレートフィルムを貼り合わせることで、同等の厚みを有するアラミド紙単体と比較して破断時の伸びが大きく改善することが判明した。上記の結果より、スキュー付の金属板積層体に絶縁シートを適応する場合には実施例に示されるような、伸びの大きな絶縁シートを用いることが有効であると考えられる。得られた３層絶縁シートは表面にアラミド紙を配した構造であるため、高耐熱性が要求されるモータの回転子や固定子への利用が期待される。 [Comparative Example 1]
Aramid paper (basis weight: 115 g / m 2 , thickness: 0.134 mm, density: 0.86 g / cm 3 ) produced by the method described in [Reference Example] was evaluated in the same manner as in Example 1 alone.
Table 1 shows the results of breakage at the time of skew formation for Examples 1 and 2 and Comparative Example 1. As shown in Table 1, it has been found that by bonding a polyethylene terephthalate film to aramid paper, the elongation at break is greatly improved as compared to a single aramid paper having the same thickness. From the above results, when applying an insulating sheet to a skewed metal plate laminate, it is considered effective to use an insulating sheet having a large elongation as shown in the examples. Since the obtained three-layer insulating sheet has a structure in which aramid paper is provided on the surface, it is expected to be used for a rotor or a stator of a motor that requires high heat resistance.
表１
Table 1
1 金属板積層体モデル
2 スロット
3 心棒
4 上蓋
5 ハンドル
6 土台
7 ビス穴
8 短冊状絶縁シート
9 穴
10 積層絶縁シート
11 アラミド紙
12 樹脂フィルム 1 Metal plate laminate model
2 slots
3 mandrel
4 Upper lid
5 Handle
6 foundation
7 Screw hole
8 Strip insulation sheet
9 holes
10 Multilayer insulation sheet
11 Aramid paper
12 Resin film
2 スロット
3 心棒
4 上蓋
5 ハンドル
6 土台
7 ビス穴
8 短冊状絶縁シート
9 穴
10 積層絶縁シート
11 アラミド紙
12 樹脂フィルム 1 Metal plate laminate model
2 slots
3 mandrel
4 Upper lid
5 Handle
6 foundation
7 Screw hole
8 Strip insulation sheet
9 holes
10 Multilayer insulation sheet
11 Aramid paper
12 Resin film
Claims (11)
- 複数の金属板を積層する工程、ここで積層された金属板は金属板の厚み方向に平行なスロットを有し、
前記スロットに、アラミド紙と樹脂フィルムとを積層させてなる積層絶縁シートを挿入する工程、
前記積層された金属板を角度を変えて回転させることでスキューを導入する工程、
を含む金属板積層体の製造方法。 A step of laminating a plurality of metal plates, wherein the laminated metal plates have slots parallel to the thickness direction of the metal plates;
Inserting a laminated insulating sheet formed by laminating aramid paper and a resin film into the slot;
Introducing skew by rotating the stacked metal plates at different angles;
The manufacturing method of the metal plate laminated body containing this. - 前記積層絶縁シートは、樹脂フィルムの片面にアラミド紙を積層した２層構造である、請求項１の金属板積層体の製造方法。 The method for producing a metal plate laminate according to claim 1, wherein the laminated insulating sheet has a two-layer structure in which aramid paper is laminated on one side of a resin film.
- 前記積層絶縁シートは、樹脂フィルムの両面にアラミド紙をそれぞれ積層した３層構造である、請求項１の金属板積層体の製造方法。 The method for producing a metal plate laminate according to claim 1, wherein the laminated insulating sheet has a three-layer structure in which aramid paper is laminated on both sides of a resin film.
- 前記積層絶縁シートは、常温における破断伸度が１５％以上である、請求項１～３のいずれかに記載の金属板積層体の製造方法。 The method for producing a metal plate laminate according to any one of claims 1 to 3, wherein the laminated insulating sheet has a breaking elongation at room temperature of 15% or more.
- 前記積層絶縁シートは、厚みが３０μｍから２０００μｍである、請求項１～４のいずれかに記載の金属板積層体の製造方法。 The method for producing a metal plate laminate according to any one of claims 1 to 4, wherein the laminated insulating sheet has a thickness of 30 µm to 2000 µm.
- （ａ）積層された複数の金属板、ここで積層された金属板は金属板の厚み方向に平行なスロットを有し、かつ前記スロットは心棒と一定の角度をもって傾斜している、および
（ｂ）前記スロットに挿入したアラミド紙と樹脂フィルムをそれぞれ少なくとも１層ずつ含む積層絶縁シート、
を含む金属板積層体。 (A) a plurality of stacked metal plates, wherein the stacked metal plates have slots parallel to the thickness direction of the metal plates, and the slots are inclined at a constant angle with the mandrel; and (b) A laminated insulating sheet comprising at least one layer each of aramid paper and a resin film inserted into the slot;
A metal plate laminate comprising: - 前記（ｂ）積層絶縁シートは、樹脂フィルムの片面にアラミド紙を積層した２層構造である、請求項６の金属板積層体。 The metal plate laminate according to claim 6, wherein the (b) laminated insulating sheet has a two-layer structure in which aramid paper is laminated on one side of a resin film.
- 前記（ｂ）積層絶縁シートは、樹脂フィルムの両面にアラミド紙をそれぞれ積層した３層構造である、請求項６の金属板積層体。 The metal plate laminate according to claim 6, wherein the (b) laminated insulating sheet has a three-layer structure in which aramid paper is laminated on both sides of a resin film.
- 前記（ｂ）積層絶縁シートは、常温における破断伸度が１５％以上である、請求項６～８のいずれかに記載の金属板積層体。 The metal plate laminate according to any one of claims 6 to 8, wherein the (b) laminated insulating sheet has a breaking elongation at room temperature of 15% or more.
- 前記（ｂ）積層絶縁シートは、厚みが３０μｍから２０００μｍである、請求項６～９のいずれかに記載の金属板積層体。 10. The metal plate laminate according to claim 6, wherein the (b) laminated insulating sheet has a thickness of 30 μm to 2000 μm.
- 請求項６～１０のいずれかに記載の金属板積層体を含む固定子または回転子。 A stator or a rotor including the metal plate laminate according to any one of claims 6 to 10.
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| KR1020187036570A KR20190007496A (en) | 2016-05-20 | 2017-04-25 | Metal plate laminate and manufacturing method thereof |
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| DE102020116383A1 (en) * | 2020-06-22 | 2021-12-23 | Valeo Siemens Eautomotive Germany Gmbh | Method of manufacturing a skewed stator |
| FR3125366A1 (en) * | 2021-07-13 | 2023-01-20 | Nidec Psa Emotors | Rotating electrical machine stator and method of manufacture |
| FR3125365A1 (en) * | 2021-07-13 | 2023-01-20 | Nidec Psa Emotors | Rotating electrical machine stator and method of manufacture |
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| JP2006197662A (en) * | 2005-01-11 | 2006-07-27 | Matsushita Electric Ind Co Ltd | Stator with skew |
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| WO2010150669A1 (en) * | 2009-06-22 | 2010-12-29 | 河村産業株式会社 | Electric motor insulating sheet and a manufacturing method therefor |
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| JP7088419B1 (en) * | 2020-09-24 | 2022-06-21 | 東レ株式会社 | Laminate |
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| KR20190007496A (en) | 2019-01-22 |
| TWI731071B (en) | 2021-06-21 |
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| CN109155575B (en) | 2022-08-19 |
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