JP4775679B2 - Method and apparatus for manufacturing laminated ribbon - Google Patents

Description

【００２５】
【表２】

【００２６】
【発明の効果】
本発明の製造方法、及びそれを適用した製造装置により、熱処理により脆化した磁性薄帯が破断することなく安定して樹脂と複合することが可能で、製造コストの削減に大きな効果がある。
【図面の簡単な説明】
【図１】本発明の一実施例を示す製造装置の概略構成図である。
【図２】磁性薄帯コイルと接着ロールとの近接部の拡大図である。
【図３】複数の磁性薄帯コイルを配した本発明の一実施例の斜視図である。
【図４】従来の積層薄帯の製造装置の概略構成図である。
【図５】従来の装置での応力集中発生部を示す斜視図である。
【図６】従来の積層薄帯の製造装置の概略構成図である。
【符号の説明】
１ 樹脂フィルム巻出し機、２ 接着ロール、３ 磁性薄帯巻出し機、４ 非拘束磁性薄帯、５ 巻取り機、６ 樹脂フィルム、７ 磁性薄帯コイル、８ ガイドロール、９ 圧着ロール、１０ 応力集中発生部、１１ 積層薄帯、１２ 磁性薄帯の接着ロール外周での接触開始位置、１３ 樹脂フィルムの接着ロール外周での接触開始位置、１４ 磁性薄帯の磁性薄帯コイル外周上の巻出し位置[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method and an apparatus for manufacturing a laminated ribbon with improved handling properties of a magnetic ribbon obtained by heat-treating an amorphous material.
[0002]
[Prior art]
Amorphous materials and nanocrystalline materials are known as magnetic ribbons having excellent magnetic properties. A typical amorphous material can be obtained as a ribbon having a thickness of 50 μm or less by rapidly cooling the molten metal on the roll surface. Although it is often used as it is, it may be subjected to heat treatment to improve magnetic properties.
In addition, the nanocrystalline material is prepared by rapidly cooling a molten metal having an alloy composition that can be adjusted to a nanocrystalline structure, such as Fe-Cu-Nb- (Si, B), in the same manner as the above amorphous alloy. Then, it can be obtained by adjusting the crystal structure by heat treatment. The nanocrystalline material is a material in which at least 50% of the structure is composed of fine crystal grains having an average crystal grain size of 100 nm or less, as shown in, for example, Japanese Patent Publication No. 4-4393.
[0003]
A magnetic ribbon of an amorphous material or a nanocrystalline material subjected to the above-described heat treatment has a tendency to become brittle due to a decrease in toughness as compared with an amorphous material that has been rapidly cooled. In particular, when crystallized by heat treatment and adjusted to a nanocrystalline structure, the tendency to embrittle is remarkable, and there is a problem that the ribbon is easily broken during handling.
Applications of the amorphous material or nanocrystalline material include, for example, a sensor material described in Japanese Patent Publication No. 5-19196 and a shielding material described in Japanese Patent Application Laid-Open No. 1-241200. In such applications, the use of brittle ribbons causes problems such as cracking and chipping during handling during processing and use, so usually a resin is applied to one or both sides of the magnetic ribbon. In many cases, the composite ribbon is used as a laminated ribbon.
[0004]
When a magnetic ribbon and a resin are combined to form the above-described laminated ribbon, the resin generally has a heat resistance of only about 300 ° C., for example, 400 ° C. as in the above-described heat treatment of the nanocrystalline material. In the case of applying a temperature exceeding, the resin cannot be applied in advance or coated before the heat treatment, and therefore, a composite thin film is formed after the heat treatment.
Conventionally, a composite of a magnetic ribbon and a resin after heat treatment is manufactured by bonding the magnetic ribbon and the resin using two adhesive rolls as shown in FIGS. 4 and 5, for example. Japanese Patent Application Laid-Open No. 12-51933 describes a manufacturing method in which a roller or the like is pressed directly on a magnetic ribbon coil to attach a resin as shown in FIG.
[0005]
[Problems to be solved by the invention]
In the conventional method shown in FIGS. 4 and 5, since the unconstrained magnetic ribbon 4 that is unwound from the magnetic ribbon coil 7 and comes into contact with the adhesive roll 2 is long, it is inhomogeneous like an amorphous material or a nanocrystalline material. When handling a brittle material, breakage may occur when the magnetic ribbon is set in the apparatus.
In addition, even after the start of production, the twist as shown in FIG. 5 due to vibration, meandering in a severe case, and in addition, because the weight of the unconstrained magnetic ribbon portion is large, That is, a large stress is likely to be generated locally at the stress middle portion 10 at the contact start portion with the magnetic ribbon coil 10 or the adhesive roll 2. In an inhomogeneous brittle material such as an amorphous ribbon, the magnetic ribbon easily breaks particularly when the embrittled portion becomes the stress concentration portion 10.
[0006]
Torsion and meandering due to the above vibration can be alleviated by unwinding the magnetic ribbon with tension applied to the unconstrained magnetic ribbon, but in this case, constant stress is always applied to the end. In addition, when twisting occurs, the stress is locally concentrated at the end of the unconstrained magnetic ribbon.
As described above, the magnetic ribbon after the heat treatment is very brittle, and thus breaks easily due to the locally concentrated stress.
[0007]
On the other hand, the apparatus described in Japanese Patent Application Laid-Open No. 12-51933 shown in FIG. 6 has no portion corresponding to the unconstrained magnetic ribbon, so that stress concentration due to twisting and meandering as described above is difficult to occur, and breakage caused thereby is not caused. Not likely to occur.
However, since the resin film 6 is affixed by pressing the pressure roll 9 or the like on the magnetic ribbon coil, stress is constantly generated on the magnetic ribbon coil 7. For this reason, if there is a portion where the winding of the magnetic ribbon is not uniform, stress concentration occurs at that portion and local fracture occurs, which is not necessarily a stable method. Also, if the running direction of the resin film and the rotation axis of the magnetic ribbon coil are not exactly perpendicular, the slight angle deviation increases as the lamination continues, and the magnetic ribbon eventually breaks on the coil. Cause problems.
In view of the above-described problems, an object of the present invention is to provide a method and an apparatus for manufacturing a magnetic ribbon that can be stably combined with a resin without breaking the magnetic ribbon embrittled by heat treatment. .
[0008]
[Means for Solving the Problems]
The present inventor does not generate stress concentration due to bending such as twisting and meandering even if the magnetic ribbon is embrittled, and no breakage occurs if the magnetic ribbon is in a uniform weak stress state. The present invention was conceived by focusing on the above. That is, in the present invention, at least 50% or more of the structure obtained by heat-treating the Fe—Cu—Nb— (Si, B) amorphous ribbon is continuous with the magnetic ribbon having a nanocrystalline structure with an average crystal grain size of 100 nm or less. In particular, a laminated ribbon manufacturing apparatus for thermocompression bonding a resin film with a hot melt agent,
A magnetic ribbon unwinding machine that unwinds the magnetic ribbon from the magnetic ribbon coil;
A resin film unwinder for unwinding a resin film with a hot melt agent;
An adhesive roll on which the magnetic ribbon and the resin film with a hot melt agent overlap on the outer periphery;
A thermocompression bonding roll for thermocompression bonding the resin film with the hot melt agent to the magnetic ribbon;
A winder that winds the magnetic ribbon on which the resin film with the hot melt agent is thermocompression bonded;
Comprising
The adhesive roll comprises a heating means for heating the adhesive roll,
A bearing is provided in the bearing portion of the magnetic ribbon unwinding machine, and the unwinding tension of the magnetic ribbon is only the bearing resistance and the tension of the winder,
these,
The magnetic ribbon and the resin film with a hot melt agent have different contact start positions on the outer periphery of the adhesive roll, and the unwinding position on the outer periphery of the magnetic ribbon coil of the magnetic ribbon and the adhesive roll of the magnetic ribbon It is the manufacturing apparatus of the laminated ribbon characterized by arranging so that the distance L with respect to the contact start position may become 0 <L <= 20mm .
[0009]
The production method of the present invention can be preferably carried out by the following production apparatus of the present invention.
That is, a laminated ribbon manufacturing apparatus that continuously applies a resin film to a magnetic ribbon obtained by heat-treating an amorphous ribbon,
A magnetic ribbon unwinding machine that unwinds the magnetic ribbon from the magnetic ribbon coil;
A resin film unwinding machine for unwinding the resin film;
An adhesive roll on which the magnetic ribbon and the resin film overlap on the outer periphery;
these,
The contact start position on the outer periphery of each adhesive roll of the magnetic ribbon and the resin film is different,
And a laminated ribbon disposed such that a distance L between an unwinding position of the magnetic ribbon on the outer periphery of the magnetic ribbon coil and a contact start position of the magnetic ribbon on the outer periphery of the adhesive roll satisfies 0 <L ≦ 20 mm. It is a manufacturing device. The distance L is preferably 0 <L ≦ 10 mm.
[0010]
It is the above-mentioned apparatus, comprising two resin film unwinding machines, and magnetically controlled by an apparatus in which the resin film contact start positions are located at two positions before and after the contact position of the magnetic ribbon on the outer periphery of the adhesive roll in the circumferential direction. Resin films can be attached to both sides of the ribbon.
The adhesive roll is preferably provided with a heating means for heating the adhesive roll, so that the thermoplastic adhesive resin can be efficiently heated. Furthermore, it is preferable to provide a pressure-bonding roll that presses the laminated ribbon in cooperation with the adhesive roll, so that a healthy laminated ribbon with less bubbles can be produced.
In addition, by arranging a plurality of the magnetic ribbon coils in the width direction of the adhesive roll, sheets having a width equal to or greater than the width of the magnetic ribbon can be continuously produced.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
As described above, the important feature in the method for producing the laminated ribbon of the present invention is that the length L of the unconstrained magnetic ribbon until the magnetic ribbon is unwound from the magnetic ribbon coil and contacts the adhesive roll. Is 0 <L ≦ 20 (mm), preferably 0 <L ≦ 10 (mm).
Hereinafter, the present invention will be described based on an embodiment. FIG. 1 shows that a resin film 6 with an adhesive on one side is unwound from a resin film unwinding machine 1, and a magnetic ribbon is unwound from a magnetic ribbon coil 7 installed in a magnetic ribbon unwinding machine 3. It is a schematic block diagram of the manufacturing apparatus of the laminated ribbon which joins on the outer periphery of 2 and makes it the laminated ribbon 11. FIG. 2 is an enlarged schematic view of the magnetic ribbon unwinder 3 and the adhesive roll 2 of FIG.
[0012]
In the present invention, the length L of the unconstrained magnetic ribbon 4 unwound from the magnetic ribbon coil 7 until it contacts the adhesive roll 2 is set to 20 mm or less. This is because it causes a meandering and breakage easily. On the other hand, if the thickness is 20 mm or less, even if the magnetic ribbon is unwound with a weak tension, the magnetic ribbon is stabilized without causing a large twist or meandering. It is particularly stable at 10 mm or less. As a result, stress concentration and breakage at the end of the unconstrained magnetic ribbon can be prevented.
[0013]
In addition, L> 0 mm, that is, making the magnetic ribbon coil and the outer peripheral surface of the adhesive roll non-contact is that the compressive stress generated by pressing the contact roll 2 against the magnetic ribbon coil 7 is broken when contacted. It is a cause.
Furthermore, by making non-contact, the magnetic ribbon unwound from the magnetic ribbon coil has a degree of freedom in the movement in the direction perpendicular to the running direction of the resin film. Even when they are not exactly perpendicular to each other, it is possible to correct spontaneous displacement, and even if the lamination is continued after the occurrence of displacement, breakage hardly occurs.
In the present invention, the degree of torsion and meandering due to vibration of the unconstrained magnetic ribbon is also affected by the width and thickness of the magnetic ribbon. Is preferably applied to a magnetic ribbon having a thickness of 20 to 100 mm and a thickness of 15 to 30 μm.
As described above, the magnetic ribbon can be stably combined with the resin without breaking by the method of the present invention.
[0014]
The method of the present invention is particularly effective in producing a laminated ribbon using a nanocrystalline material in which at least 50% of the structure has a nanocrystalline structure with an average crystal grain size of 100 nm or less. Nanocrystalline materials are significantly more brittle than ordinary amorphous materials after heat treatment of amorphous ribbons. As described above, according to the manufacturing method of the present invention, stress concentration is unlikely to occur in the magnetic ribbon. Therefore, even if a nanocrystalline material that is extremely brittle and breaks easily is used, breakage is unlikely to occur during manufacturing.
[0015]
Next, the manufacturing apparatus of the present invention suitable for carrying out the manufacturing method of the present invention will be described with reference to FIGS.
In the apparatus of the present invention, the contact start position 12 on the outer periphery of the magnetic ribbon adhesive roll is different from the contact start position 13 on the outer periphery of the adhesive roll of the resin film, and unwinding of the outer surface of the magnetic ribbon coil of the magnetic ribbon is different. The distance L between the position 14 and the contact start position 12 on the outer periphery of the adhesive roll of the magnetic ribbon, that is, the length L of the unconstrained magnetic ribbon during the production of the laminated ribbon is 0 <L ≦ 20 mm, preferably 0 < A magnetic ribbon unwinding machine 3, a resin film unwinding machine 1, an adhesive roll 2, and a guide roll 8 are arranged so that L ≦ 10 mm.
By arranging each part so that the respective contact start positions 12 and 13 are different, the unwinding position 14 of the magnetic ribbon coil outer peripheral surface of the magnetic ribbon and the outer periphery of the adhesive roll of the magnetic ribbon without interfering with each other It is possible to make the contact start position 12 close. Thereby, as explained in the method of the present invention, the magnetic ribbon can be stably combined with the resin without breaking.
[0016]
Further, when a thermoplastic resin is used for adhesion between the magnetic ribbon and the resin film, the adhesive roll is preferably provided with a heating means for heating the adhesive roll.
In the conventional apparatus shown in FIG. 4, the magnetic ribbon and the resin film are substantially in contact with the adhesive roll with lines, whereas in the apparatus of the present invention shown in FIG. 1, the magnetic ribbon and the resin film are in contact with the adhesive roll, respectively. After that, a state in which the laminated ribbon is formed and contacted with the outer peripheral surface of the adhesive roll is maintained until it is separated. Therefore, it is possible to sufficiently heat the magnetic ribbon and the resin film on the adhesive roll, and as a result, it is possible to efficiently produce a laminated ribbon having good bonding without requiring a separate heating device. The entire apparatus is not increased in size as in the case where a heating device is provided.
[0017]
In addition, the present invention preferably includes a pressure-bonding roll. After laminating the magnetic ribbon and the resin film as shown in FIG. 1, the adhesion is strengthened by moderately reducing the pressure by the pressure roll 9, and further, the air bubbles wrapped around the adhesive interface of the ribbon can be discharged to the outside. I can do it.
In FIG. 1, the pressure-bonding roll 9 is provided at the position of the guide roll of the resin film so as to also serve as the guide roll, but may be provided separately. Further, in the apparatus of the present invention, as described above, after the magnetic ribbon and the resin film are in contact with the adhesive roll, the state where the magnetic ribbon and the resin film are in contact with the outer peripheral surface of the adhesive roll is maintained until the laminated ribbon is formed and separated. If necessary, a plurality of pressure-bonding rolls can be provided, and the adhesion can be further strengthened without increasing the size of the apparatus.
[0018]
Furthermore, as shown in FIG. 3, a wide laminated ribbon can be manufactured by arranging a plurality of magnetic ribbon coils 7 in the width direction. In the apparatus of the present invention, it is possible to appropriately arrange a magnetic ribbon coil at an arbitrary position on the adhesive roll 2, and a laminated ribbon exceeding the width of the magnetic ribbon without enlarging the apparatus other than the roll width. Can be manufactured. In FIG. 3, two magnetic ribbon coils 7 are arranged. However, if there is a space on the outer periphery of the adhesive roll, it is possible to arrange three or more magnetic ribbon coils.
[0019]
In the apparatus of the present invention described above, the resin film unwinder 1 is provided with a brake for applying tension to the resin film to stabilize the running, and the winder 5 is also provided with a take-up tension applying mechanism so as to be on the laminated ribbon. It is preferable because wrinkles can be suppressed. Further, in order to prevent a large tension from being generated in the unconstrained magnetic ribbon 4, a bearing is provided at the bearing portion of the magnetic ribbon coil unwinder 3, and only by the resistance of this bearing and the winding tension of the winder 5. It is preferable to unwind the magnetic ribbon.
Also, as the magnetic ribbon is unwound from the magnetic ribbon coil, the coil diameter decreases, and as a result, L increases, so when manufacturing a long laminated ribbon, the position of the magnetic ribbon unwinder is controlled. It is preferable to provide a control mechanism for keeping L constant.
[0020]
In the present invention, affixing a resin film means bonding or thermocompression bonding of the resin film.
A sheet of polyethylene terephthalate (PET) or the like is suitable as the resin film. The thickness is preferably 5 to 500 μm, and is attached to the magnetic ribbon with an adhesive or a hot melt agent.
Specifically, as shown in FIG. 1, it is affixed on only one side or both sides of the magnetic ribbon. Also, a resin film can be affixed on one side and a double-sided adhesive tape and release paper can be affixed on the other side.
[0021]
【Example】
An amorphous ribbon coil was formed by winding 20 m of an amorphous ribbon having the composition of Fe ₇₆ Cu ₁ Nb _2.5 Si _13.5 B ₇ (at%) and the width and thickness shown in Table 1. This was held at a heat treatment temperature of 550 ° C. for 1 hour and then cooled to obtain a magnetic ribbon coil. The structure of the magnetic ribbon after the heat treatment was observed with a transmission electron microscope, and it was confirmed that the average crystal grain size was 50 nm or less.
Using the apparatus shown in FIG. 3, a laminated ribbon was produced under the following conditions using the magnetic ribbon and the resin film, and the fracture frequency was evaluated by the following method. In addition, the degree of twisting and meandering of the unconstrained magnetic ribbon was confirmed visually.
[0022]
Manufacturing conditions Resin film: Polyethylene terephthalate film with hot melt agent Adhesive roll diameter: 0.2 m
Adhesive roll peripheral speed: 80 mm / sec
Adhesive roll surface temperature: 150 ° C
Length L of unconstrained magnetic ribbon: Evaluation method described in Table 2 Fracture frequency: Number of breaks that occurred while all of the magnetic ribbons for 3 coils were laminated ribbons under each condition.
The results are shown in Table 2. While it is almost independent of the width and thickness of the ribbon, fracture does not occur when L is 10 mm or less, but breakage occurs as L increases beyond this, and the frequency of fracture is high particularly when it is greater than 20 mm.
In addition, the torsion and meandering of the unconstrained magnetic ribbon during production was stable without twisting and meandering when L was 10 mm or less, while twisting of the unconstrained magnetic ribbon was confirmed above that. When L was 30 mm, meandering was also confirmed.
[0024]
[Table 1]

[0025]
[Table 2]

[0026]
【The invention's effect】
With the manufacturing method of the present invention and a manufacturing apparatus to which the manufacturing method is applied, the magnetic ribbon embrittled by the heat treatment can be stably combined with the resin without breaking, which has a great effect on the reduction of the manufacturing cost.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a manufacturing apparatus showing an embodiment of the present invention.
FIG. 2 is an enlarged view of a proximity portion between a magnetic ribbon coil and an adhesive roll.
FIG. 3 is a perspective view of an embodiment of the present invention in which a plurality of magnetic ribbon coils are arranged.
FIG. 4 is a schematic configuration diagram of a conventional laminated ribbon manufacturing apparatus.
FIG. 5 is a perspective view showing a stress concentration generation unit in a conventional apparatus.
FIG. 6 is a schematic configuration diagram of a conventional laminated ribbon manufacturing apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Resin film unwinding machine, 2 Adhesive roll, 3 Magnetic ribbon unwinding machine, 4 Unconstrained magnetic ribbon, 5 Winder, 6 Resin film, 7 Magnetic ribbon coil, 8 Guide roll, 9 Crimp roll, 10 Stress concentration generating part, 11 laminated ribbon, 12 contact start position on the outer periphery of the adhesive roll of the magnetic ribbon, 13 contact start position on the outer periphery of the adhesive roll of the resin film, 14 winding on the outer periphery of the magnetic ribbon coil of the magnetic ribbon Out position

Claims (4)

A hot-melt agent is continuously applied to a magnetic ribbon in which at least 50% or more of the structure obtained by heat-treating an Fe—Cu—Nb— (Si, B) -based amorphous ribbon is a nanocrystalline structure having an average crystal grain size of 100 nm or less. a resin film an apparatus for producing a laminated ribbon for thermal compression per,
A magnetic ribbon unwinding machine that unwinds the magnetic ribbon from the magnetic ribbon coil;
A resin film unwinder for unwinding a resin film with a hot melt agent ;
And bonding roll the on outer peripheral magnetic ribbon and a resin film with hot-melt agent overlap,
A thermocompression bonding roll for thermocompression bonding the resin film with the hot melt agent to the magnetic ribbon;
A winder that winds the magnetic ribbon on which the resin film with the hot melt agent is thermocompression bonded;
Comprising
The adhesive roll comprises a heating means for heating the adhesive roll,
A bearing is provided in the bearing portion of the magnetic ribbon unwinding machine, and the unwinding tension of the magnetic ribbon is only the bearing resistance and the tension of the winder ,
these,
The magnetic ribbon and the resin film with a hot melt agent have different contact start positions on the outer periphery of the adhesive roll, and the unwinding position on the outer periphery of the magnetic ribbon coil of the magnetic ribbon and the adhesive roll of the magnetic ribbon An apparatus for producing a laminated ribbon, characterized in that the distance L to the contact start position is such that 0 <L ≦ 20 mm. 2. The laminated ribbon manufacturing apparatus according to claim 1, wherein the distance L is 0 <L ≦ 10 mm. Two resin film unwinding machines with the hot melt agent, the contact start position of the resin film with the hot melt agent at two positions in the circumferential direction of the contact start position of the magnetic ribbon on the outer periphery of the adhesive roll The apparatus for producing a laminated ribbon according to claim 1 or 2 , wherein the apparatus is located. The apparatus for producing a magnetic ribbon according to any one of claims 1 to 3 , comprising a plurality of the magnetic ribbon coils in a width direction of the adhesive roll.

Images