JP2003318051A - Anisotropic sheet magnet, and method and apparatus for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thermoplastic elastomer or thermoplastic composition in which high orientation of anisotropic magnetic powder is possible for high magnetic characteristics, a flexible anisotropic sheet magnet of high orientation and high magnetic characteristics comprising the composition which is productive, and a method and apparatus for manufacturing the same. <P>SOLUTION: The manufacturing apparatus for an anisotropic sheet magnet has a plurality of transportation vessels for transporting a sheet mold provided to a manufacture line comprising process parts including a preheating process, a heat holding process, a magnetic field orientation process, and a cooling process. The transportation vessel has such shape as to pinch the sheet mold with plate-like surfaces. It is plate-like and comprises a bottom part and an upper lid of magnetic material, and is magnetically discontinuous with each other when loaded with the sheet mold. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a flexible high orientation
More specifically, the present invention relates to an anisotropic sheet magnet having high magnetic properties, a manufacturing apparatus and a manufacturing method for manufacturing the anisotropic sheet magnet, and more specifically, an elastomer composition containing a ferromagnetic powder is made into an isotropic sheet molded body by a calender roll or the like, and then this isotropic sheet is formed. And a magnetic sheet oriented by magnetic field orientation by applying heat to a flexible sheet molded body to bring the elastomer into a semi-molten state.

[0002]

2. Description of the Related Art A magnetized elastomer composition is obtained by kneading rubber and magnetic anisotropic magnetic powder (for example, rare earth magnetic powder containing Sm). In order to obtain a high-performance magnet, the compounding amount of magnetic anisotropic magnetic powder is, for example, about 50% by volume.
It is said that Then, the magnetizing composition is formed into a sheet or the like, and a magnetic field is applied to the sheet to orient the magnetically anisotropic magnetic powder to obtain a flexible magnet sheet. A magnet having a high magnetic force can be obtained by magnetizing the flexible magnet sheet in the anisotropic direction.

Conventionally, as a method for orienting magnetic particles contained in a thermoplastic elastomer or a thermoplastic, extrusion molding was performed while applying a magnetic field.
As described above, the method of giving a magnetic field and orienting the thermoplastic elastomer or the thermoplastic resin in a state of being melted by heat has high productivity but low magnetic properties. In order to obtain high magnetic properties, it is necessary to improve the degree of orientation of magnetically anisotropic magnetic powder, but in order to increase the degree of orientation in such extrusion molding, increase the mold temperature during magnetic field application. Also, the strength of the molded product when it comes out of the mold becomes weak and a sheet-shaped molded product cannot be obtained, or if the mold temperature is lowered to increase the strength of the molded product, the degree of orientation decreases. There is such a problem.

For example, in order to solve this problem, Japanese Unexamined Patent Application Publication No.
In Japanese Patent Publication No. 001-115044, heat of 15 ° C. to 80 ° C. is applied to a rolled sheet forming body, the sheet forming body is placed on a flat surface of a pole having a coil, and sandwiched between the poles to form a coil. It is described that a sheet molding is oriented by passing an electric current. This makes it possible to form a wide sheet with excellent magnetic properties.

[0005]

However, in order to carry out mass production, a manufacturing line including the handling of the molded body, the heating process, and the cooling process is installed. How is this manufacturing line performed? There was room for consideration such as whether to convey the sheet molded body or the anisotropic sheet magnet. Therefore, the present invention provides a thermoplastic elastomer or a thermoplastic composition capable of achieving highly oriented magnetic anisotropic magnetic powder and achieving high magnetic properties, and a highly productive flexible highly oriented composition using the composition. It is an object to provide an anisotropic sheet magnet having high magnetic properties, a manufacturing apparatus and a manufacturing method thereof.

[0006]

As a manufacturing apparatus for solving the present invention, a sheet is attached to a manufacturing line equipped with each processing section for performing a preheating step, a heating and holding step, a magnetic field orientation step, and a cooling step. An anisotropic sheet magnet manufacturing apparatus comprising a plurality of transport containers for transporting a molded body, wherein the transport container has a shape capable of narrowing a sheet molded body between substantially plate-shaped surfaces. And In order to manufacture a high-performance anisotropic sheet magnet, especially one having a high degree of orientation, it is necessary to orient each sheet compact in an optimal state. It was found that the temperature of the sheet molded body must be at least 100 ° C. or higher in order to obtain an orientation degree of 80 or even 90% or more.
A heating means can be provided in the apparatus for orienting the magnetic field, but a separate time is required to heat the sheet molded body, and the discharge amount in the orienting apparatus is reduced. Therefore, in mass production, it is necessary to provide heating means separately from the orienting device for sheet moldings. However, by simply rotating the sheet molding unit, the heat given by the heating means escapes to the outside during transportation and each sheet molding is performed. Temperature variation occurs for each body, and the anisotropic sheet magnet characteristics are not stable due to influence during orientation.
Also, the sheet molded body is in a very flexible and brittle state,
It is very difficult to convey the heating, magnetic field orientation, and cooling steps without deformation.

[0007] In order to solve these problems, it is necessary to narrow each sheet molded body in a thickness direction by a transport container and move it around the line. The deformation of the sheet molded body can be suppressed, the sheet is shielded from the outside air, the transport container itself also serves as a heat retaining member, and the magnetic characteristics due to orientation are stabilized. In addition, it is preferable that the carrying container has a bottom portion and a top lid, which are magnetic bodies, to be sandwiched, because it is easy to apply a desired orientation magnetic field to the sheet compact during orientation. As a matter of course, it is preferable that the surfaces of the bottom portion and the upper lid which are in contact with the sheet molding are parallel to each other. This transport container preferably has a shape in which the bottom portion and the upper lid are magnetically discontinuous when the sheet formed body is loaded, because the orientation magnetic field does not short-circuit between the bottom portion and the upper lid and effectively passes through the sheet formed body. Further, when the sheet molded body is sandwiched, it is preferable that the side surface of the sheet molded body is free of the magnetic material of the transport container. This is because when a magnetic body is arranged on the side surface of the sheet molded body, the magnetic flux escapes to this portion and the orientation may be disturbed on the side surface of the sheet molded body. Especially 1.5
This problem is likely to occur in a sheet molded body having a thickness of mm or more. The sheet molded body may be made smaller than the bottom area of the transport container to have a gap in the side surface portion, but separate consideration is required when sandwiching. For example, if the carrier container has a structure in which a non-magnetic material is placed on the side surface of the sheet molded body when the sheet molded body is loaded, and the sheet molded body is sealed by the bottom portion, the upper lid and the side surface portions, there is no problem with uniform orientation. It is possible to manufacture an anisotropic sheet magnet having a uniform structure. Further, even if the orienting means uses a pole piece having a diameter smaller than the size of the sheet molded body, the magnetic flux passes through the bottom and the upper lid of the magnetic body, and the magnetic flux is easily applied uniformly to the sheet molded body of the transport container, A suitable orientation state can be provided regardless of the size of sheet molding.
In the present invention, the transport container is defined as "a shape in which a sheet molded body can be narrowed between substantially plate-shaped surfaces", but the sandwiching method is not limited, and known means are applied. Just do it.

As a manufacturing method, a plurality of transfer containers for transferring the sheet molded body are provided at various places on a manufacturing line equipped with respective processing sections for performing a preheating step, a heating and holding step, a magnetic field orientation step, and a cooling step. In the method for producing an anisotropic sheet magnet continuously conveyed to, the transport container uses a shape capable of narrowing a sheet molded body with a bottom of a magnetic material and an upper lid, and the sheet molded body is used for the transport container. After narrowing, the sheet molded body is preheated and held at 100 to 300 ° C. together with the transport container, and then an orientation magnetic field is applied in the sheet thickness direction through the transport container promptly, followed by cooling. To do. It is also possible to perform the demagnetization step after magnetic field orientation or cooling.

Further, the thermoplastic elastomer or thermoplastic used for the sheet molding is nitrile rubber (NB
R), styrene-butadiene rubber (SBR), EVA,
Thermoplastic elastomer such as natural rubber or synthetic rubber such as butadiene rubber, silicone rubber, butyl rubber, urethane rubber, fluororubber and polyolefin resin such as polystyrene, polyethylene, polypropylene, chlorinated polyethylene, nylon, polyester, polyurethane, ethylene There are thermoplastics such as vinyl acetate copolymers. After preparing a compound in which magnetic anisotropic magnetic powder is uniformly dispersed in at least one elastomer or plastic selected from these groups, a sheet is prepared by a calender roll method or the like, and then 100
The inventors have found that it is possible to orient the magnetically anisotropic magnetic powder by heating at a temperature of ℃ to 300 ℃, preferably 120 ℃ to 200 ℃ and applying a magnetic field, and have completed the present invention. That is, the flexible magnet sheet of the present invention is obtained by orienting magnetic anisotropic magnetic powder having an average particle diameter of 10 μm or less in a binder containing a thermoplastic elastomer or a thermoplastic component and a surface treatment agent, a surfactant and the like. It is a thing. In the above magnet sheet, it is preferable that the elastomer component is 5 parts by weight or more and 15 parts by weight or less, and the magnetic anisotropic magnetic powder is 85 parts by weight or more and 95 parts by weight or less. preferable. Further, in the above magnetic elastomer composition, the binder is nitrile rubber (NBR), styrene-butadiene rubber (SBR), EVA, butadiene rubber, silicone rubber, butyl rubber, urethane rubber, fluorine rubber or other natural rubber or synthetic rubber. Elastomers such as polystyrene and polyolefin resins such as polystyrene, polyethylene, polypropylene and chlorinated polyethylene, and nylon,
Polyester, polyurethane, ethylene vinyl acetate copolymer, etc. are available. At least one selected from these groups is preferable, and the magnetic anisotropic rare earth magnetic powder is Sm-Co, Sm-Fe-N, or Nd-Fe-.
It is preferably a B-based magnetic anisotropic magnetic powder.

The method for producing the flexible magnet sheet of the present invention defines the method for producing the sheet from the above-mentioned binder and magnetic powder, and then forming the sheet by a calender roll method or the like. The known method can be used. In the above-described method for manufacturing a flexible anisotropic sheet magnet, the temperature is preferably 120 to 100 ° C. to apply a magnetic field in the thickness direction of the sheet to orient the easy axis of magnetization of the magnetically anisotropic magnetic powder in the thickness direction of the sheet. 20
At 0 ° C., the magnetic field strength is 796 kA / m (10 kOe) or more. If it is not within this range, it is difficult to obtain an anisotropic sheet magnet having an orientation degree of 80 or even 90% or more even if the present manufacturing method is used. A magnetized magnetic powder in this anisotropic sheet magnet is flexible and has great magnetic characteristics, and is useful as a magnet for a small motor or the like.

The magnetic anisotropic magnetic powder is a fine powder having a property that the easy axis of magnetization of the magnetic powder is oriented when a magnetic field is applied. The magnetic anisotropic magnetic powder is an intermetallic compound (alloy powder) of a rare earth element and a transition metal. Sm, Nd as the rare earth element
Examples of the transition metal include Fe, Co, and Ni. Examples of magnetic powder are Nd-Fe-B system, Sm-Co
And fine powder of Sm-Fe-N system. When Sm-Fe-N-based magnetic powder is used as the magnetic powder, workability, rust resistance,
It is preferable in terms of surface smoothness of the sheet. An example of the Sm-Fe-N-based magnetic powder is Sm ₂ Fe ₁₇ N ₃ alloy powder. This Sm
As a —Fe—N-based magnetic powder, R _α T in atomic%
_{100- (α + β + γ + δ)} M _β B _γ N _δ (R is at least one rare earth element including Y and always contains Sm, T is Fe or Fe and Co, M is Al, Ti, V, C
r, Mn, Cu, Ga, Zr, Nb, Mo, Hf, Ta
And at least one of W and 5 ≦ α ≦ 18, 0 ≦ β
≦ 10, 0 ≦ γ ≦ 4, 4 ≦ δ ≦ 30) are included.

In this composition, R always contains Sm, and in addition to Sm, Y, La, Ce, Pr, Nd, Eu, G
It is allowed to contain at least one of d, Tb, Dy, Ho, Er, Tm, Yb and Lu. A mixture of two or more kinds of rare earth elements such as Sm misch metal and didymium may be used. As R, more preferably Sm or Sm
And La and at least one combination of Y, Ce, Pr, Nd, Gd, Dy and Er, more preferably Sm or Sm and La and Y and Ce, Pr and Nd.
It is preferable that R is Sm or Sm and La in combination with at least one of the above. In terms of the purity of Sm, in order to satisfy iHc ≧ 397.9 kA / m (5 kOe), the Sm ratio in R is preferably 50 atom% or more, more preferably 70 atom% or more. R, O, H, C, Al, Si, Na, M, which is unavoidable in production,
Inevitable impurities such as g and Ca in total 10 out of R
It is allowed to contain not more than atomic%. R content (α)
Is preferably 5 to 18 atom%, more preferably 6 to 12 atom%. When the R content is less than 5 atomic%, iHc ≧ 397.9kA / m (5kO
It is difficult to obtain e), and if it exceeds 18 atomic%, (BH) max is greatly reduced.

Al, Ti, V, Cr, Mn, Cu, G
The content (β) of the M element consisting of at least one of a, Zr, Nb, Mo, Hf, Ta and W is preferably 0 to 10 atomic%. IHc increases with the increase of M element, but when the content of M element exceeds 10 atomic%, ThMn ₁₂
Type Sm (Fe, M) ₁₂ N _z phase is generated and iHc is greatly reduced. The B content (γ) is preferably 0 to 4 atomic%. IHc increases as the amount of B increases,
If it exceeds 4 atomic%, iHc is greatly reduced. The nitrogen content (δ) is preferably 4 to 30 atom%, more preferably 10 to 20 atom%. Below 4 atom% and above 30 atom%, iHc, (B
H) max is greatly reduced. 0.01 to 30 atom% of a part of Fe
Of Co is preferable, and 1 to 20 atomic% of Co
More preferably, Although the Curie temperature and the temperature coefficient of iHc are improved by containing a predetermined amount of Co, (BH) max and iHc are significantly reduced when the Co content exceeds 30 atomic%, and the addition effect is less than 0.01 atomic%. unacceptable.

The preferred thermoplastic elastomer or thermoplastic component is used in an amount of 5 to 15 parts by weight, more preferably 8 parts by weight or more and 12 parts by weight or less. The preferred magnetic powder component is used in an amount of 85 to 95 parts by weight, more preferably 88 parts by weight or more and 92 parts by weight or less. Such a thermoplastic elastomer or thermoplastic composition provides a flexible magnet sheet excellent in orientation of magnetic powder and mechanical properties, and also in surface smoothness, and also a magnet having high magnetic force. If the amount of magnetic powder is less than 85 parts by weight, magnetic properties are likely to deteriorate. On the other hand, if it exceeds 95 parts by weight, it becomes difficult to form it into a sheet and the flexibility of the sheet tends to be lost. The thermoplastic elastomer or the thermoplastic composition of the present invention may be blended with other additive components such as a stabilizer, a lubricant, a cross-linking agent, a colorant, a plasticizer and an antioxidant, if necessary.

A coupling agent can be used as the surface treatment agent, examples of which include titanate coupling agents and silane coupling agents. It is preferable to mix magnetic powder, which has been surface-treated with a coupling agent in advance, with the elastomer component. The preferable amount of the surface treatment agent used is about 0.01 to
The ratio is 5 parts by weight. The titanate-based coupling agent is a titanate ester (titanate) in which a hydrophilic group and a lipophilic group are bonded to the central element titanium, and the hydrophilic group is an oxyacetic acid group, -SO ₃ -group, -PO ₄ H- group, Examples of the lipophilic group include an alkoxyl group and the like, and a long-chain alkyl group having 8 to 25 carbon atoms. ). Examples of titanate-based coupling agents are RO-Ti- (OCOR1) ₃ [wherein R is an alkyl group such as methyl and ethyl, and R1 is the long-chain alkyl group described above. ]. When the titanate-based coupling agent is used, the dispersibility of the magnetic powder in the elastomer component and the binding force between the elastomer component and the magnetic powder are improved, and the packing can be increased.

The silane coupling agent has a silane functional group and an organic functional group, and is, for example, R-Si.
(OR1) ₃ [wherein R is a vinyl group, γ-methacryloxypropyl group or the like, and R1 is a methyl group, an ethyl group or the like. The silane coupling agent has two or more reactive groups in the molecule, one reactive group is an alkoxyl group such as methoxy group and ethoxy group, the other reactive group is a vinyl group,
An epoxy group or the like.

The thermoplastic elastomer or thermoplastic composition of the present invention can be easily obtained by mixing at least three components of an elastomer component, magnetic powder and a surface treatment agent, and if necessary, the above-mentioned additional components such as a lubricant. These mixtures can be kneaded at temperatures of about 100-200 ° C,
The kneaded product is crushed if necessary. Examples of the kneading device include a Henschel mixer, an extruder, a Banbury mixer, and a roll. As a means for promoting the orientation, there is a method of applying a magnetic field by a stationary magnetic field or an alternating magnetic field.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is described in detail below.
The magnetic powder was an Sm-Fe-N system, and a substantially spherical fine powder having an average particle diameter of 3 μm was used. The specific gravity of the magnetic powder was set to 7.6, and the specific gravity of the components other than the magnetic powder was set to 1 to calculate the weight percentage. For the orientation degree (%), the residual magnetic flux density Br1 in the magnetic field applying direction and the residual magnetic flux density Br2 in the direction perpendicular to the magnetic field are measured with a BH meter, and Br ₁ / (Br ₁ + Br ₂ ) × 10
Calculated from 0.

Example 1: 5 parts by weight of nitrile rubber, 4 parts of polystyrene, 90 parts of magnetic powder and 1 surface treatment agent
The mixture was kneaded and then finely pulverized with a pulverizer to obtain a magnetized elastomer composition. This magnetized elastomer composition has an elastomer component (nitrile rubber)
Magnetic powder (Sm-Fe-N based magnetic powder) was dispersed in a matrix containing a surface treatment agent (silane coupling agent). The magnetized elastomer composition was rolled by a calender at a roll temperature of 100 ° C. to give a width of 20.
A sheet having a length of 0 mm, a length of 20 m and a thickness of 1 mm was obtained. The sheet had excellent surface properties and had a smooth surface. This sheet was cut into 100 × 100 mm pieces, and sandwiched by a transport container whose bottom and top were made of a magnetic material as shown in FIG.
Next, this transport container was mounted on an anisotropic sheet magnet manufacturing apparatus having a series of stages as shown in FIG. This transport container was preheated to a temperature of 100 ° C. in stage 1. Next, on the stage 2, the transport container was held at a temperature of 140 ° C. for 120 seconds so that the temperature was uniform. Next, in stage 3, the carrier container is placed between the pole pieces of the electromagnet, and a current is passed through the coil to generate a magnetic field between the poles of 796 kA / m (10 kOe), and this magnetic field is held for 5 seconds. A magnetic field was applied in the thickness direction of the sheet. The diameter of the pole piece at this time is 70
It was mm. In the transport container shown in FIG. 1, that is, the sheet holding mold, an iron material (S45C), which is a high magnetic permeability material, is used for both the bottom portion and the top lid. The bottom and the top lid may be made of soft magnetic material. Highly permeable materials such as permendur are even more preferred. The holding mold does not need to have a particularly high mechanical strength, since the device does not need to be pressed. The inner diameter of the transfer container was a 100 × 100 mm square, and the thickness of the bottom and top lid was 2 mm. When the sheet thickness is thin as described above, the magnetic flux lines flow perpendicularly to the bottom portion and the upper lid in the vicinity of the side surface even if the side surface is a magnetic body, so the orientation of the sheet magnet is good, but the sheet thickness is large. In the case, the influence of the magnetic flux lines flowing through the side surface appears,
This results in disordered orientation. In such a case, as shown in FIG. 2, by inserting a non-magnetic (for example, SUS304) square ring inside, the magnetic flux lines passing through the seat portion can be made vertical. Alternatively, as shown in FIG. 3, it is possible to eliminate the short circuit of the magnetic flux on the side surface portion by forming the side surface portion entirely of a non-magnetic material. As the non-magnetic material, a ceramic material such as alumina can be used in addition to metal. After that, the current is applied in the opposite direction to 119
Generate a reverse magnetic field of 4 kA / m (15 kOe),
The magnetic field was demagnetized by holding it for 1 second and applying it. Next, cooling was performed on the stage 4. Cooling was performed by bringing a heat-radiating plate cooled by air or water into contact. At stage 6, the sheet magnet was taken out. After the flexible magnet sheet was manufactured by such a process, the maximum energy product [(BH) max] was measured as a magnetic property by a BH tracer manufactured by Toei Industry Co., Ltd. The magnetic characteristic is Br = 0.
67T (6.7 kG), iHc = 597 kA / m (7.
5 kOe), (BH) M = 74.8 kJ / m ³ (9.4
The degree of orientation in MGOe) was 91%. The results of magnetic properties are shown in Table 1.

[0020]

[Table 1]

As described above, even if a holding die having a top portion and a bottom portion having a larger area than the pole piece is used, the magnetic flux uniformly passes between the holding die which is a magnetic body, so that the orientation becomes uniform. Of course, it is possible to make the top lid and the bottom portion, which have the same magnetic characteristics anywhere in the seat surface, smaller than the pole piece, but the productivity is reduced. When a material other than the magnetic material is used for the upper lid and the bottom, uniform characteristics can be obtained only in the diameter range of the pole piece.

Examples 2 to 9 are the same as the resin of Example 1.
Except for the combination, a sheet was prepared in the same manner as in Example 1 and magnetic
It is the example which measured the characteristic. Examples 10 to 19 are
Change resin amount of 1 ~ 9, ratio of magnetic powder, type of surface treatment agent
A magnetic sheet was prepared in the same manner as in Example 1 except that
This is an example of measurement. From Examples 1-9 of Table 1, these
By molding with resin at the heating temperature shown in Table 1,
Coercive force of 398 kA / m (5 kOe) or more and 8
A degree of orientation of 0% or more is obtained, and 63.7 kJ / m ^Three(8M
(BH) max equal to or higher than GOe) was obtained.

Further, it can be seen from Examples 10 to 11 that excellent magnetic properties can be obtained by using these resins alone. Excellent magnetic properties were obtained even when the compounding amount was changed as shown in Examples 14 to 19. Table 2 shows the measurement results.

[0024]

[Table 2]

In Comparative Examples 1 to 3 shown in Table 3, the heating temperature is 1
An example is shown below when the temperature is set to 00 ° C. or lower and when set to 200 ° C. or higher. Others were the same as in Example 1. High iHc is obtained when the heating temperature is low, but the degree of orientation is 80%.
Below, only low (BH) max can be obtained. 200
If the temperature is above ℃, the degree of orientation will be higher than 90%.
c is deteriorated and cannot be put to practical use.

[0026]

[Table 3]

In Examples 20 to 25, the type of magnetic powder was Nd-F.
This is an example of examination by changing to the e-B system. Anisotropy N here
dFeB magnetic powder was used. By molding under the composition and heating conditions shown in Table 3, high magnetic characteristics similar to those of the SmFeN system were obtained.

The flexible anisotropic sheet magnet was passed through a demagnetizer for demagnetization, and then cut into strips having a width of 5 mm and a length of 30 mm. By incorporating this strip-shaped sheet inside a motor case and magnetizing it in a radial 12-pole pattern, a magnet having a magnetized flexible magnet sheet was obtained. A motor using this magnet has better magnetic characteristics and excellent heat resistance than a motor equipped with a magnet sheet manufactured using conventional isotropic rare earth magnetic powder, and has higher output and lower power consumption. It was a motor.

[0029]

As described above, according to the present invention,
It is possible to manufacture a thermoplastic elastomer or a thermoplastic composition capable of highly orienting magnetically anisotropic magnetic powder and achieving high magnetic properties, and a highly productive flexible magnet sheet using the composition. . This permanent magnet is useful in the field of electronic devices such as small motors and industrial products, and can contribute to high performance and miniaturization of electronic devices and industrial products.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of a carrier container used in the present invention.

FIG. 2 is a schematic cross-sectional view of another transport container used in the present invention.

FIG. 3 is a schematic cross-sectional view of another transport container used in the present invention.

FIG. 4 is an example of a production line used in the present invention.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Makoto Ushijima             5200 Mikkajiri, Kumagaya-shi, Saitama Hitachi Metals Co., Ltd.             Company Advanced Electronics Research Center F-term (reference) 5E040 AA11 AA19 BB04 CA01 HB07                       HB19 NN12                 5E062 CC04 CD05 CF02 CF05 CF09                       CG01

Claims (7)

[Claims] 1. Anisotropy comprising a plurality of transport containers for transporting a sheet molded body in a production line equipped with respective processing units for performing a preheating step, a heating and holding step, a magnetic field orientation step, and a cooling step. An apparatus for manufacturing a sheet magnet, wherein the transport container has a shape capable of narrowing a sheet molded body between substantially plate-shaped surfaces. 2. The transport container according to claim 1, wherein the transport container has a substantially plate-like bottom portion made of a magnetic material and an upper lid, and is magnetically discontinuous when the sheet molded body is loaded. Manufacturing equipment for anisotropic sheet magnets. 3. The transport container has a structure in which, when a sheet molded body is loaded, a non-magnetic material is arranged on a side surface of the sheet molded body, and the sheet molded body is sealed by a bottom portion, an upper lid and a side surface portion. Item 2. An anisotropic sheet magnet manufacturing apparatus according to item 2. 4. A production line equipped with processing units for performing a preheating step, a heating and holding step, a magnetic field orientation step, and a cooling step, and a plurality of transfer containers for transferring the sheet molded body are continuously provided at various places. In the method for manufacturing an anisotropic sheet magnet to be transported to, the transport container has a shape capable of narrowing a sheet molded body with a bottom and an upper lid of a magnetic body, and the sheet molded body is narrowed in the transport container. Then, the sheet molded body together with the transport container 10
A method for producing an anisotropic sheet magnet, comprising preheating and holding at 0 to 300 ° C., quickly applying an orientation magnetic field in the sheet thickness direction via a transport container, and then cooling. 5. The sheet molded body is mainly composed of Sm-Fe-N.
The method for producing an anisotropic sheet magnet according to claim 4, wherein the anisotropic sheet magnet is composed of a magnetic powder and a thermoplastic resin. 6. The method for producing an anisotropic sheet magnet according to claim 4, wherein the demagnetizing step is performed after magnetic field orientation or cooling. 7. An orientation degree of 80% or more and a coercive force iHc of 5
Anisotropic sheet magnet with 50 kA / m or more