JP2002008936A - Method and device for manufacturing inner/outer peripheral material of coil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize resource conservation by reducing the used amount of an insulating resin on the inner and outer peripheries of the coil of a stationary induction electromagnetic apparatus, by improving the mechanical strength and insulation strength of the inner or outer peripheral material of the coil manufactured through winding of a sheet-like insulating material a plurality of times, by increasing the bonding property between the layers of the insulating material. SOLUTION: Since the inner or outer peripheral material of the coil is manufactured through winding and shaping the sheet-like insulating material 1 by means of a core 4, and a pressurizing roller 6 after the material 1 is heated with a light beam emitted from a light beam generator 15, the joining property between the layers of the material wound a plurality of times can be enhanced, and accordingly, the mechanical strength and insulation strength of the inner and outer peripheral materials of the coil can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil of a stationary induction electromagnetic device which is electrically insulated by a solid insulating material such as a resin.

[0002]

2. Description of the Related Art A conventional method for manufacturing a coil inner peripheral material or an outer peripheral material of a solid insulated stationary induction electromagnetic device is to wind a sheet-shaped insulating material around a core, heat-harden the material, and further apply an insulating resin to the outside thereof. By providing a layer, insulation strength and mechanical strength were increased. Further, in order to enhance the bonding between the layers of the sheet-like insulating material wound a plurality of times in order to increase the insulation strength and the mechanical strength, the sheet-like insulating material is heated and molded by a heating roller at the time of winding the sheet-like insulating material.

FIG. 5 shows a method of manufacturing a coil inner peripheral material or an outer peripheral material of a conventional stationary induction electromagnetic device.

In FIG. 5, reference numeral 101 denotes a sheet-like insulating material;
Reference numeral 102 denotes a heating roller that heat-molds the sheet-shaped insulating material during winding, 103 denotes a winding core that winds the sheet-shaped insulating material,
Reference numeral 104 denotes a rotating shaft that rotates the core.

[0005] A sheet-shaped insulating material 101 is mounted on a core 103 attached to a rotating shaft 104, and the core 103 is rotated via the rotating shaft 104 to take up the sheet-shaped insulating material 101, and the inner peripheral material of the coil or Manufacture outer material. In this case, when the sheet-shaped insulating material 101 is wound up, it is wound and formed while being heated and pressed by the heating roller 102, so that the bonding between the layers of the sheet-shaped insulating material wound up a plurality of times is enhanced, and the mechanical strength is increased. It is manufactured so that there is no gap that becomes defective in terms of electrical insulation and electrical insulation.

[0006]

However, if the sheet-like insulating material is simply wound by the winding core, a gap is formed between the layers of the sheet-like insulating material. There was a problem in mechanical strength and electrical insulation. Therefore, by providing an insulating resin layer outside the coil inner peripheral material and the coil outer peripheral material, mechanical strength and electrical insulation have been enhanced.

Further, in the manufacturing method shown in FIG. 5 in which the winding quality of the sheet-like insulating material is improved to increase the mechanical strength and the electrical insulation of the coil inner peripheral material and the coil outer peripheral material, the heating roller 102 In order to perform heating, the contact area with the sheet-shaped insulating material 101 is small, and the heating of only the contact surface of the sheet-shaped insulating material does not raise the temperature of the opposite surface, so that sufficient heating cannot be performed. Poor connectivity.

When the temperature of the heating roller is increased to sufficiently heat the sheet, the sheet-like insulating material 102 on the contact surface with the heating roller 102 melts violently.
2, the resin of the sheet-like insulating material 101 adheres, and there is a problem of maintenance during manufacturing.

Further, if the heating contact time between the heating roller 102 and the sheet-like insulating material 101 is increased in order to sufficiently perform heating, there is a problem that the manufacturing time is increased.

Further, when the pressing force of the heating roller 102 is increased in order to sufficiently perform heating, the resin of the molten sheet-shaped insulating material 101 may protrude from a specified width,
There was a problem that the mechanical strength of the core 103 and the rotating shaft 104 had to be increased.

The present invention solves the above-mentioned problems, and
It is possible to increase the mechanical strength and the insulation strength of the inner or outer peripheral material of the coil formed by winding the sheet-shaped insulating material a plurality of times.

[0012]

In order to achieve the above object, a first means of the present invention is to provide a method for winding a sheet-like insulating material which can be bonded to the inner or outer periphery of a coil by heating. This is a method for manufacturing a coil inner / outer peripheral material in which after heating an insulating material, the heated sheet-shaped insulating material is wound while being pressed and molded by a roller.

A second means of the present invention is to heat a sheet-like insulating material which can be adhered by heating with a heating device, and then take up the sheet-like insulating material mounted on the core while pressing it with a roller. This is a manufacturing device for the coil inner and outer peripheral materials.

A third aspect of the present invention is the method for manufacturing the coil inner and outer peripheral members according to the first aspect, wherein the heating of the sheet-like insulating material is performed by a heating roller.

According to a fourth aspect of the present invention, in the second aspect, the heating device is a roller type heating device, and is a device for manufacturing the coil inner and outer peripheral members.

According to a fifth aspect of the present invention, there is provided a method of manufacturing a coil inner and outer peripheral material according to the first aspect, wherein the heating of the sheet-like insulating material which can be bonded by heating is performed by hot air.

According to a sixth aspect of the present invention, in the second aspect, the heating device is a hot air generating device, and is a device for producing a coil inner and outer peripheral material.

A seventh means of the present invention is the method of manufacturing the coil inner and outer peripheral members according to the first means, wherein the heating of the sheet-like insulating material which can be bonded by heating is performed by a radiant heater.

According to an eighth aspect of the present invention, in the second aspect, the heating device is a device for producing a coil inner and outer peripheral member which is a radiant heater.

A ninth aspect of the present invention is a method of manufacturing the coil inner and outer peripheral members according to the first aspect, wherein the heating of the sheet-like insulating material which can be bonded by heating is performed by a light beam.

According to a tenth aspect of the present invention, in the second aspect, the heating device is a light beam device, and a coil inner / outer peripheral material manufacturing apparatus.

According to an eleventh aspect of the present invention, in the first aspect, the third aspect, the fifth aspect, the seventh aspect, or the ninth aspect, wherein the sheet-like insulating material comprises a fiber carrying an epoxy prepreg. In this method, a sheet-shaped insulating material is heated to 90 ° C. to 150 ° C. and then wound and formed to produce a coil inner peripheral material or a coil outer peripheral material.

According to a twelfth aspect of the present invention, in the second means, the fourth means, the sixth means, the eighth means or the tenth means, wherein the sheet-like insulating material is a fiber carrying an epoxy prepreg. After heating the sheet-like insulating material to 90 ° C. to 150 ° C. with a heating device, the sheet-like insulating material mounted on the core was wound up while being pressed and molded with a roller. This is a device for manufacturing a coil inner peripheral material or an outer peripheral material.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first means of the present invention is to heat a sheet-like insulating material which can be adhered to the inner or outer periphery of a coil by heating, after heating the sheet-like insulating material. By manufacturing the coil inner and outer peripheral materials to be wound while pressing the sheet-shaped insulating material with a roller, good heating of the sheet-shaped insulating material becomes possible, and the bonding between the layers of the wound sheet-shaped insulating material is improved. As a result, the insulation strength and mechanical strength of the coil inner and outer peripheral materials are improved.

The second means of the present invention is that, after heating a sheet-like insulating material which can be adhered by heating with a heating device, the sheet-like insulating material attached to the core is wound up while being pressed and molded by a roller. By using a manufacturing apparatus for the coil inner and outer peripheral materials, it is possible to heat the sheet-like insulating material in a favorable manner, and to improve the bonding between the layers of the wound sheet-like insulating material. The mechanical strength is improved.

A third means of the present invention is the method according to the first means, wherein the heating of the sheet-shaped insulating material is performed by a method of manufacturing a coil inner and outer peripheral material by a heating roller. By increasing the temperature, sufficient heating becomes possible, and the bonding between the layers of the wound sheet-shaped insulating material is improved, so that the insulation strength and mechanical strength of the coil inner and outer peripheral materials are improved.

According to a fourth aspect of the present invention, in the second aspect, the heating device is a roller type heating device for manufacturing the inner and outer peripheral members of the coil, thereby increasing the heating area of the sheet-shaped insulating material. As a result, sufficient heating is possible, and the bonding between the layers of the wound sheet-like insulating material is improved, so that the insulation strength and mechanical strength of the coil inner and outer peripheral materials are improved.

According to a fifth aspect of the present invention, in the first aspect, a method of manufacturing the inner and outer peripheral members of the coil is performed, wherein the heating of the sheet-like insulating material which can be bonded by heating is performed by hot air.
The sheet-shaped insulating material can be heated in a non-contact manner, and the heating area is increased and sufficient heating becomes possible, and the bonding property between the layers of the wound sheet-shaped insulating material is improved. The mechanical strength is improved.

In a sixth aspect of the present invention, the sheet-like insulating material can be heated in a non-contact manner in the second means, wherein the heating device is a hot air generator and a device for manufacturing the inner and outer peripheral members of the coil. The heating area is increased, sufficient heating is possible, and the bonding between the layers of the wound sheet-shaped insulating material is improved, so that the insulation strength and mechanical strength of the coil inner and outer peripheral materials are improved.

A seventh aspect of the present invention is a method according to the first aspect, wherein the heating of the sheet-like insulating material which can be adhered by heating is performed by a method of manufacturing a coil inner and outer peripheral material performed by a radiant heater. Since the insulating material can be heated uniformly without contact and the heating area can be easily increased, sufficient heating is possible, the bonding between the layers of the wound sheet-like insulating material is improved, and the inner and outer circumferences of the coil are improved. The insulation strength and mechanical strength of the material are improved.

In an eighth aspect of the present invention, in the second aspect, the heating device is a device for manufacturing the inner and outer peripheral members of the coil which is a radiant heater, so that the sheet-shaped insulating material can be uniformly heated in a non-contact manner. And the heating area can be easily increased, so that sufficient heating is possible, the bonding between the layers of the wound sheet-shaped insulating material is improved, and the insulation strength and mechanical strength of the coil inner and outer peripheral materials are improved. I do.

A ninth aspect of the present invention is a method according to the first aspect, wherein the heating of the sheet-like insulating material that can be bonded by heating is performed by a method of manufacturing a coil inner and outer peripheral material by a light beam. The material can be heated sufficiently in a non-contact manner, the bonding between the layers of the wound sheet-shaped insulating material is improved, and the insulation strength and mechanical strength of the coil inner and outer peripheral materials are improved.

According to a tenth aspect of the present invention, in the second aspect, the heating device is a device for manufacturing the inner and outer peripheral members of the coil, which is a light beam device, so that the sheet-like insulating material can be sufficiently heated without contact. As a result, the bonding between the layers of the wound sheet-like insulating material is improved, and the insulation strength and mechanical strength of the coil inner and outer peripheral materials are improved.

An eleventh means of the present invention is that the sheet-like insulating material is made of a fibrous material carrying epoxy prepreg, and the sheet-like insulating material is heated to 90 ° C. to 150 ° C. and then wound and formed. By using the method of manufacturing the coil inner peripheral material or the coil outer peripheral material, the bonding between the layers of the wound sheet-shaped insulating material is improved, and the insulating strength and mechanical strength of the coil inner and outer peripheral materials are improved.

The twelfth means of the present invention is that the sheet-like insulating material is made of a fibrous material carrying epoxy prepreg, and the sheet-like insulating material is heated to 90 ° C.
By making the coil inner peripheral material or coil outer peripheral material manufacturing device equipped with a heating device for heating to 150 ° C., the sheet-like insulating material can be sufficiently heated in a non-contact manner, and an interlayer between the wound sheet-like insulating material can be obtained. Is improved, and the insulation strength and mechanical strength of the coil inner and outer peripheral materials are improved.

(Embodiment 1) Hereinafter, Embodiment 1 of the present invention will be described with reference to FIG.

FIG. 1 is a perspective view of a coil inner peripheral material winding device according to Embodiment 1 of the present invention.

In FIG. 1, reference numeral 1 denotes a sheet-like insulating material in which an epoxy prepreg is carried on a glass gloss substrate, and 2 denotes a sheet-like insulating material that is held in a rotating manner and is pulled when the sheet-like insulating material is wound. A material holding shaft having a rotary brake mechanism to apply a pulling force in a direction opposite to the direction, a heating roller for heating the sheet-like insulating material,
4 is a winding core for winding the sheet-shaped insulating material 1, 5 is a rotating shaft for rotating the winding core 4, 6 is a pressing roller for pressing and molding when winding the sheet-shaped insulating material 1, and 7 is holding a pressing roller 6 Reference numeral 8 denotes a motor unit for rotating the rotating shaft 5, and 9 denotes a support plate on which the holding shaft 2, the heating roller 3 and the holding legs 7 are mounted.

The sheet-shaped insulating material 1 is mounted on a material holding shaft 2, passed through a heating roller 3 and mounted on a core 4. Core 4
Is attached to the rotating shaft 5, is rotated by the motor unit 8 and the rotating shaft 5, and winds the sheet-shaped insulating material 1 around a plurality of times.
Form the coil inner peripheral material.

In this case, in a state where the sheet-like insulating material 1 is heated by the heating roller 3, the sheet-like insulating material 1 is wound up by the winding core 4 while applying a pulling force by the rotation brake of the material holding shaft 2, and further pressed by the pressing roller 6. By molding, the gap between the layers of the sheet-like insulating material 1 wound a plurality of times can be eliminated, and the bonding between the layers can be improved.

Further, since the heating roller 3 for heating the sheet-like insulating material 1 is independent of the pressure roller 6, the heating contact area of the sheet-like insulating material 1 can be increased, so that sufficient heating is possible. Since the epoxy of the sheet-like insulating material 1 can be in a good molten state,
It is possible to further improve the bonding between the layers of the sheet-like insulating material wound a plurality of times, and to increase the mechanical strength and the electrical insulation strength of the coil inner peripheral member formed by winding the sheet-like insulating material a plurality of times. .

Then, by winding a conductor having been subjected to interlayer insulation around the above-described coil inner peripheral material to form a static induction electromagnetic device coil such as a transformer or a reactor, a coil having high mechanical strength and high insulation strength can be easily obtained. The surrounding material can be manufactured.

As described above, according to the first embodiment, the heating area can be increased by heating the sheet-like insulating material 1 with the heating roller 3 independent of the pressing roller 6, so that the sheet-like insulating material can be increased. The material 1 can be sufficiently heated. Then, the sufficiently heated sheet-shaped insulating material 1 is wound up by the winding core 4 while applying a pulling force by the rotation brake of the material holding shaft 2, and further pressure-formed by the pressure roller 6 to produce a coil inner peripheral material. I do. This can eliminate gaps between the layers of the sheet-shaped insulating material 1 that has been wound a plurality of times, and can further improve the bonding between the layers and integrate them. Strength and insulation strength can be increased.

When the sheet-like insulating material is a fibrous material carrying epoxy prepreg, the heating temperature of the sheet-like insulating material by the heating roller is preferably 90 ° C. to 150 ° C. If the temperature is lower than 90 ° C., the epoxy prepreg is not sufficiently melted, and the bonding between the layers of the wound sheet-shaped insulating material is insufficient. On the other hand, when the temperature exceeds 150 ° C., the degree of melting of the epoxy prepreg becomes large, and the strength at the time of winding the sheet-like insulating material becomes insufficient, causing problems such as breakage.

Further, in this embodiment, an example is shown in which the sheet-like insulating material is a material in which an epoxy prepreg is carried on a glass cloth substrate, but not only a glass cloth substrate but also a glass nonwoven fabric, polyethylene terephthalate (hereinafter referred to as PET). The same effect can be obtained even with a base material such as cloth and pet nonwoven fabric. Similar effects can be obtained not only with epoxy prepregs, but also with prepregs such as phenol and aromatic polyamide.

In this embodiment, the material holding shaft 2
Has an example in which a rotary brake is provided, but the same effect can be obtained not only with the rotary brake but also with a structure in which a roller applies a pulling force in a direction opposite to the winding direction when winding the sheet-like insulating material. . The same effect can be obtained by employing a structure in which a tensile force is applied in a direction opposite to the winding direction when winding the sheet-shaped insulating material by another method. Further, the pulling force in this case is 0.5
kg to 5 kg are desirable. If the weight is smaller than 0.5 kg, a gap is easily formed between layers of the sheet-shaped insulating material wound a plurality of times. If it is more than 5 kg, problems such as breakage of the sheet-like insulating material occur.

In the present embodiment, the heating roller 3
Although the example in which two are attached is shown, the same effect can be obtained even if not two. In addition, effective heating is also possible with a structure in which a sheet-shaped insulating material is sandwiched between a plurality of heating rollers to simultaneously heat both surfaces.

When the sheet-like insulating material 1 heated by the pressure roller 6 is pressed, good pressure molding can be performed by setting the pressure of the pressure roller 6 to 7.5 kPa to 30 kPa. When the pressure is lower than 7.5 kPa, the pressure is insufficient and the bonding between the layers of the sheet-like insulating material wound a plurality of times becomes insufficient. In addition, when the pressing force is larger than 30 kPa, there is a problem that the molten resin of the sheet-shaped insulating material protrudes beyond the width of the fibrous material and does not have a specified size.

(Embodiment 2) Hereinafter, Embodiment 2 of the present invention will be described with reference to FIG.

FIG. 2 is a perspective view of a coil inner peripheral material winding device according to a second embodiment of the present invention. The same components as those in FIG. 1 are denoted by the same reference numerals and description thereof is omitted.

Reference numeral 10 denotes a support plate on which the holding shaft 2 and the holding legs 7 are attached. Reference numeral 11 denotes a hot air generator, 12 denotes a hose for sending hot air blown from the hot air generator 11, and 13 denotes a sheet of hot air blown from the hot air generator 12. It is an outlet for blowing on insulating material.

The sheet-shaped insulating material 1 is mounted on the material holding shaft 2, mounted on the core 4, and arranged so that the sheet-shaped insulating material 1 is wound around the rotating shaft 5 a plurality of times. I have.

The hot air blown from the hot air generator 12 is blown through the hose 13 and the hot air outlet 14 onto the sheet-like insulating material 1 before being wound by the winding core 4.

In this case, in a state where the sheet-like insulating material 1 is heated by the hot air blown from the hot-air generating device 12, the sheet-like insulating material 1 is wound by the winding core 4 while applying a pulling force by the rotary brake of the material holding shaft 2, and further wound. The inner peripheral material of the coil is manufactured while being pressed by the pressure roller 6.

As a result, it is possible to eliminate the gap between the layers of the sheet-shaped insulating material 1 wound a plurality of times, and to further improve the bonding between the layers.

Further, since the sheet-like insulating material 1 is heated by hot air, the heating area can be made wider than the heating area when the roller is used for both heating and pressurization as shown in the conventional example, so that sufficient heating can be achieved. And the epoxy of the sheet-like insulating material 1 can be brought into a good molten state, so that the bonding between the layers of the sheet-like insulating material wound a plurality of times can be further improved, and the sheet-like insulating material 1 can be further improved. Can be increased a plurality of times to increase the mechanical strength and electrical insulation strength of the coil inner peripheral material.

Then, a coil having high mechanical strength and high insulation strength can be easily obtained by winding a conductor having been subjected to interlayer insulation around the above-described coil inner peripheral material to form a coil for a static induction electromagnetic device such as a transformer or a reactor. The inner peripheral material can be manufactured.

As described above, according to the second embodiment, the heating area can be increased by heating the sheet-like insulating material 1 with hot air, so that the sheet-like insulating material 1 can be sufficiently heated. Become. Then, the sufficiently heated sheet-shaped insulating material 1 is wound up by the winding core 4 while applying a pulling force by the rotation brake of the material holding shaft 2, and further pressure-formed by the pressure roller 6 to produce a coil inner peripheral material. By doing so, it is possible to eliminate the gap between the layers of the sheet-shaped insulating material 1 wound a plurality of times, and to further improve the bonding between the layers and integrate them, so that the coil inner peripheral material of the stationary induction electromagnetic device It is possible to increase the mechanical strength and the insulation strength of the steel.

When the sheet-like insulating material is a fibrous material carrying epoxy prepreg, the heating temperature of the sheet-like insulating material by hot air is preferably 90 ° C. to 105 ° C. If the temperature is lower than 90 ° C., the epoxy prepreg does not melt sufficiently, and the bonding between the layers of the wound sheet-like insulating material becomes insufficient. On the other hand, when the temperature exceeds 150 ° C., the degree of melting of the epoxy prepreg becomes large, and the strength at the time of winding the sheet-like insulating material becomes insufficient, causing problems such as breakage.

Further, in this embodiment, an example is shown in which the sheet-like insulating material is a material in which an epoxy prepreg is supported on a glass cloth substrate, but not only a glass cloth substrate but also a glass nonwoven fabric, polyethylene terephthalate (hereinafter, referred to as “polyethylene terephthalate”).
The same effect can be obtained even with a base material such as a (pet) cloth or a nonwoven fabric of a pet. Similar effects can be obtained not only with epoxy prepregs, but also with prepregs such as phenol and aromatic polyamide.

In the present embodiment, the material holding shaft 2
Has an example in which a rotary brake is provided, but the same effect can be obtained not only with the rotary brake but also with a structure in which a roller applies a pulling force in a direction opposite to the winding direction when winding the sheet-like insulating material. . The same effect can be obtained by employing a structure in which a tensile force is applied in a direction opposite to the winding direction when winding the sheet-shaped insulating material by another method. Further, the pulling force in this case is 0.5
kg to 5 kg are desirable. If the weight is smaller than 0.5 kg, a gap is easily formed between layers of the sheet-shaped insulating material wound a plurality of times. If it is more than 5 kg, problems such as breakage of the sheet-like insulating material occur.

In this embodiment, the example in which the hot air outlet is attached to one place is shown. However, it is possible to increase the heating area by attaching a plurality of places and to heat both sides of the sheet-like insulating material. Effective heating is possible.

When the sheet-like insulating material 1 heated by the pressure roller 6 is pressed, good pressure molding can be performed by setting the pressure of the pressure roller 6 to 7.5 kPa to 30 kPa. When the pressure is lower than 7.5 kPa, the pressure is insufficient and the bonding between the layers of the sheet-like insulating material wound a plurality of times becomes insufficient. In addition, when the pressing force is larger than 30 kPa, there is a problem that the molten resin of the sheet-shaped insulating material protrudes beyond the width of the fibrous material and does not have a specified size.

(Embodiment 3) Embodiment 3 of the present invention will be described below with reference to FIG.

FIG. 3 is a perspective view of a coil inner peripheral member winding device according to Embodiment 3 of the present invention. The same components as those in FIG. 1 are denoted by the same reference numerals and description thereof is omitted.

Reference numeral 14 denotes a radiation heater.

The sheet-like insulating material 1 is attached to the material holding shaft 2, attached to the core 4, and arranged so as to be wound around the sheet-like insulating material 1 a plurality of times by the core 4 attached to the rotating shaft 5. I have.

The radiant heater 14 is arranged so as to heat the sheet-like insulating material 1 before being wound by the winding core 4.

In this case, the sheet-like insulating material 1 is heated by the radiant heat of the radiant heater 14, wound up by the winding core 4 while applying a pulling force by the rotating brake of the material holding shaft 2, and furthermore by the pressing roller 6. The inner peripheral material of the coil is manufactured while press-molding with.

As a result, it is possible to eliminate the gap between the layers of the sheet-like insulating material 1 wound a plurality of times, and to further improve the bonding between the layers.

Further, since the sheet-like insulating material 1 is heated by the radiant heater 14, the heating area can be easily expanded, so that sufficient heating can be performed, and the epoxy resin of the sheet-like insulating material 1 can be easily removed. The molten state can be further improved, so that the bonding between the layers of the sheet-shaped insulating material wound multiple times is further improved, and the mechanical strength and electric strength of the coil inner peripheral member formed by winding the sheet-shaped insulating material multiple times are improved. The insulation strength can be increased.

A coil having high mechanical strength and high insulation strength can be easily obtained by winding a conductor having been subjected to interlayer insulation around the coil inner peripheral material shown above to form a coil for a static induction electromagnetic device such as a transformer or a reactor. The inner peripheral material can be manufactured.

As described above, according to the second embodiment, the heating area can be easily increased by heating the sheet-like insulating material 1 with the radiant heat of the radiant heater 14. Can be sufficiently heated.
Then, the sufficiently heated sheet-shaped insulating material 1 is wound up by the winding core 4 while applying a pulling force by the rotation brake of the material holding shaft 2, and further pressure-formed by the pressure roller 6 to produce a coil inner peripheral material. By doing so, it is possible to eliminate the gap between the layers of the sheet-shaped insulating material 1 wound multiple times,
Furthermore, since the layers can be integrated by improving the connectivity between the layers, it is possible to increase the mechanical strength and insulation strength of the coil inner peripheral member of the stationary induction electromagnetic device.

When the sheet-like insulating material is a fibrous material carrying epoxy prepreg, the heating temperature of the sheet-like insulating material by hot air is preferably 90 ° C. to 150 ° C. If the temperature is lower than 90 ° C., the epoxy prepreg is not sufficiently melted, and the bonding between the layers of the wound sheet-shaped insulating material is insufficient. On the other hand, when the temperature exceeds 150 ° C., the degree of melting of the epoxy prepreg becomes large, and the strength at the time of winding the sheet-like insulating material becomes insufficient, causing problems such as breakage.

In this embodiment, an example is shown in which the sheet-like insulating material is a material in which an epoxy prepreg is supported on a glass cloth substrate, but not only a glass cloth substrate but also a glass nonwoven fabric, polyethylene terephthalate (hereinafter referred to as PET). The same effect can be obtained even with a base material such as cloth and pet nonwoven fabric. Similar effects can be obtained not only with epoxy prepregs, but also with prepregs such as phenol and aromatic polyamide.

In this embodiment, the material holding shaft 2
Has an example in which a rotary brake is provided, but the same effect can be obtained not only with the rotary brake but also with a structure in which a roller applies a pulling force in a direction opposite to the winding direction when winding the sheet-like insulating material. . The same effect can be obtained by employing a structure in which a tensile force is applied in a direction opposite to the winding direction when winding the sheet-shaped insulating material by another method. Further, the pulling force in this case is 0.5
kg to 5 kg are desirable. If the weight is smaller than 0.5 kg, a gap is easily formed between layers of the sheet-shaped insulating material wound a plurality of times. If it is more than 5 kg, problems such as breakage of the sheet-like insulating material occur.

Further, in this embodiment, the example in which the radiant heater 14 is attached to one place is shown. However, it is possible to increase the heating area by attaching a plurality of places and to heat both surfaces of the sheet-shaped insulating material. Further effective heating is possible.

When the sheet-like insulating material 1 heated by the pressure roller 6 is pressed, good pressure molding can be performed by setting the pressure of the pressure roller 6 to 7.5 kPa to 30 kPa. When the pressure is lower than 7.5 kPa, the pressure is insufficient and the bonding between the layers of the sheet-like insulating material wound a plurality of times becomes insufficient. In addition, when the pressing force is larger than 30 kPa, there is a problem that the molten resin of the sheet-shaped insulating material protrudes beyond the width of the fibrous material and does not have a specified size.

(Embodiment 4) Embodiment 4 of the present invention will be described below with reference to FIG.

FIG. 4 is a perspective view of a coil inner peripheral material winding device according to Embodiment 4 of the present invention. The same components as those in FIG. 1 are denoted by the same reference numerals and description thereof is omitted.

Reference numeral 15 denotes a light beam generator that collects light emitted from a xenon lamp to generate a light beam, and 16 denotes an optical fiber for transmitting light from the light beam generator 15 to an emission unit 17.

The sheet-like insulating material 1 is attached to the material holding shaft 2, attached to the core 4, and arranged so that the sheet-like insulating material 1 is wound around the core 4 attached to the rotating shaft 5 a plurality of times. I have.

Further, the light beam emitted from the light beam generator 15 is arranged so as to irradiate the sheet-like insulating material 1 before being wound on the core 4 via the optical fiber 16 and the emission unit 17.

In this case, the sheet-like insulating material 1 is heated by the light beam emitted from the light beam generator 15 and wound up by the core 4 while applying a pulling force by the rotation brake of the material holding shaft 2. Further, the inner peripheral material of the coil is manufactured while performing pressure molding with the pressure roller 6.

As a result, a gap between the layers of the sheet-shaped insulating material 1 wound a plurality of times can be eliminated, and the bonding between the layers can be further improved.

Further, since the sheet-like insulating material 1 is heated by the light beam, the heating area can be easily widened, so that sufficient heating is possible, and the epoxy resin of the sheet-like insulating material 1 is brought into a good molten state. Therefore, the bonding between the layers of the sheet-shaped insulating material wound multiple times can be further improved, and the mechanical strength and electrical insulation of the coil inner peripheral member formed by winding the sheet-shaped insulating material multiple times can be improved. Strength can be increased.

By winding a conductor having been subjected to interlayer insulation around the above-described coil inner peripheral material to form a static induction electromagnetic device coil such as a transformer or a reactor, a coil having high mechanical strength and high insulation strength can be easily obtained. The surrounding material can be manufactured.

As described above, according to the fourth embodiment, the sheet-like insulating material 1 can be heated sufficiently by heating the sheet-like insulating material 1 with a light beam, so that the sheet-like insulating material 1 can be sufficiently heated. Becomes Then, the sufficiently heated sheet-shaped insulating material 1 is wound up by the winding core 4 while applying a pulling force by the rotation brake of the material holding shaft 2, and further pressure-formed by the pressure roller 6 to produce a coil inner peripheral material. By doing so, it is possible to eliminate the gap between the layers of the sheet-shaped insulating material 1 wound a plurality of times, and to further improve the bonding between the layers and integrate them, so that the coil inner peripheral material of the stationary induction electromagnetic device It is possible to increase the mechanical strength and the insulation strength of the steel.

When the sheet-like insulating material is a fibrous material carrying epoxy prepreg, the heating temperature of the sheet-like insulating material by hot air is preferably 90 ° C. to 150 ° C. If the temperature is lower than 90 ° C., the epoxy prepreg is not sufficiently melted, and the bonding between the layers of the wound sheet-shaped insulating material is insufficient. On the other hand, when the temperature exceeds 150 ° C., the degree of melting of the epoxy prepreg becomes large, and the strength at the time of winding the sheet-like insulating material becomes insufficient, causing problems such as breakage.

In this embodiment, an example is shown in which the sheet-like insulating material is a material in which an epoxy prepreg is supported on a glass cloth substrate, but not only a glass cloth substrate but also a glass nonwoven fabric, polyethylene terephthalate (hereinafter referred to as PET). The same effect can be obtained even with a base material such as cloth and pet nonwoven fabric. Similar effects can be obtained not only with epoxy prepregs, but also with prepregs such as phenol and aromatic polyamide.

In the present embodiment, the material holding shaft 2
Has an example in which a rotary brake is provided, but the same effect can be obtained not only with the rotary brake but also with a structure in which a roller applies a pulling force in a direction opposite to the winding direction when winding the sheet-like insulating material. . The same effect can be obtained by employing a structure in which a tensile force is applied in a direction opposite to the winding direction when winding the sheet-shaped insulating material by another method. Further, the pulling force in this case is 0.5
kg to 5 kg are desirable. If the weight is smaller than 0.5 kg, a gap is easily formed between layers of the sheet-shaped insulating material wound a plurality of times. If it is more than 5 kg, problems such as breakage of the sheet-like insulating material occur.

In this embodiment, the light beam generator 15 collects the light of a xenon lamp to generate a light beam. However, the light beam generator 15 collects the light of another lamp instead of the xenon lamp. A device that generates a light beam,
The same effect as described above can be obtained even with a laser device such as a YAG laser, a semiconductor laser, and a CO2 laser.

Further, in this embodiment, an example in which the light beam emitting unit 17 is provided at one location is shown. However, by attaching the light beam emitting unit 17 at a plurality of locations to increase the heating area or heating both surfaces of the sheet-like insulating material, Effective heating is possible. Further, by making the lens of the emission unit 17 an anamorphic lens and making the light beam elliptical, more effective heating can be performed.

When the sheet-like insulating material 1 heated by the pressure roller 6 is pressed, good pressure molding can be performed by setting the pressure of the pressure roller 6 to 7.5 kPa to 30 kPa. When the pressure is lower than 7.5 kPa, the pressure is insufficient and the bonding between the layers of the sheet-like insulating material wound a plurality of times becomes insufficient. In addition, when the pressing force is larger than 30 kPa, there is a problem that the molten resin of the sheet-shaped insulating material protrudes beyond the width of the fibrous material and does not have a specified size.

In the first to fourth embodiments, the example in which the coil inner peripheral material is manufactured has been described. However, a coil in which an insulated conductor is wound around the coil inner peripheral material is attached to the core, and the above-mentioned coil outer peripheral member is attached to the outer periphery of the coil. In the same manner as described above, the same effect as described above can be obtained by winding a sheet-shaped insulating material and using it as a coil outer peripheral material.

Also, in the first to fourth embodiments, an example has been shown in which a single sheet-like insulating material is wound around a core to produce a coil inner peripheral member. The same effects as described above can be obtained also in the case of manufacturing a mold coil inner peripheral material.

Further, in Embodiments 1 to 4, even greater effects can be obtained by using a pressure roller capable of heating the pressure roller 6.

[0098]

As described above, according to the first aspect of the present invention, the coil inner peripheral material or the coil outer peripheral material is made of a sheet-like insulating material which can be adhered by heating by being wound a plurality of times,
After heating the sheet-like insulating material at the time of winding the sheet-like insulating material, the heated sheet-like insulating material is rolled while being pressed and molded by a roller, and the coil inner peripheral material or the coil outer peripheral material is manufactured. Heating of the sheet-like insulating material becomes possible, and the bonding between the layers of the wound sheet-like insulating material is improved, so that the insulating strength and mechanical strength of the coil inner and outer peripheral materials are improved, and the amount of insulating resin is reduced. This makes it possible to save the resources of the coil.

According to the second means of the present invention, after the sheet-like insulating material that can be bonded by heating is heated by a heating device, the sheet-like insulating material attached to the core is pressed and molded by a roller. By using the coil inner peripheral material or the coil outer peripheral material manufacturing apparatus, it becomes possible to heat the sheet-like insulating material in a favorable manner, and the bonding between the layers of the wound sheet-like insulating material is improved. Since the insulation strength and mechanical strength of the material can be improved and the amount of insulating resin can be reduced, it is possible to save the resources of the coil.

According to the third aspect of the present invention, the sheet-like insulating material is heated by a heating roller when the sheet-like insulating material is wound, and then the heated sheet-like insulating material is pressure-formed by a pressure roller. By using a manufacturing method in which the coil inner peripheral material or the coil outer peripheral material is produced while winding, the heating area of the sheet-like insulating material can be increased and sufficient heating can be performed. Is improved, the insulation strength and mechanical strength of the coil inner and outer peripheral materials are improved, and the amount of insulating resin can be reduced, so that the resource of the coil can be saved.

According to the fourth aspect of the present invention, after the sheet-like insulating material that can be bonded by heating is heated by a roller-type heating device, the sheet-like insulating material attached to the core is applied by a pressure roller. By using a coil inner peripheral material or coil outer peripheral material manufacturing device equipped with a mechanism for winding while pressing, the heating area of the sheet-like insulating material can be increased and sufficient heating can be performed. Since the bonding between the layers of the material is improved, the insulating strength and mechanical strength of the coil inner and outer peripheral materials are improved, and the amount of the insulating resin can be reduced, so that the coil can be resource-saving.

According to the fifth aspect of the present invention, the sheet-like insulating material is heated by hot air at the time of winding the sheet-like insulating material, and then the heated sheet-like insulating material is wound up while being pressed with a roller. Since the sheet-shaped insulating material can be heated in a non-contact manner by using the manufacturing method of manufacturing the coil inner peripheral material or the coil outer peripheral material, the maintenance property is good and the heating area can be easily increased. . As a result, sufficient heating becomes possible, and the bonding between the layers of the wound sheet-shaped insulating material is improved, so that the insulating strength and mechanical strength of the coil inner and outer peripheral materials are improved, and the amount of insulating resin can be reduced. As a result, the coil can be resource-saving.

According to the sixth aspect of the present invention, the sheet-like insulating material which can be bonded by heating is heated by a hot air generator, and then the sheet-like insulating material attached to the core is pressure-formed by a roller. By using a coil inner peripheral material or coil outer peripheral material manufacturing device equipped with a winding mechanism, the sheet-like insulating material can be heated in a non-contact manner, so that the maintenance property is good and the heating area can be easily increased. It becomes possible. As a result, sufficient heating becomes possible, and the bonding between the layers of the wound sheet-shaped insulating material is improved, so that the insulating strength and mechanical strength of the coil inner and outer peripheral materials are improved, and the amount of insulating resin can be reduced. As a result, the coil can be resource-saving.

According to the seventh aspect of the present invention, the sheet-like insulating material is heated by a radiant heater when the sheet-like insulating material is wound, and then the heated sheet-like insulating material is wound while being pressed with a roller. By adopting a manufacturing method for manufacturing the coil inner peripheral material or the coil outer peripheral material, the sheet-shaped insulating material can be uniformly heated without contact. Furthermore, the heating area can be easily increased, and the maintainability is improved. This makes it possible to sufficiently heat the sheet-like insulating material, to improve the bonding between the layers of the wound sheet-like insulating material, and to improve the insulation strength and mechanical strength of the coil inner and outer peripheral materials. The amount of resin can be reduced, and the resources of the coil can be saved.

According to the eighth means of the present invention, after the sheet-like insulating material which can be bonded by heating is heated by a radiant heater, the sheet-like insulating material attached to the core is pressure-formed by a roller. By using the coil inner peripheral material or the coil outer peripheral material manufacturing apparatus provided with a winding mechanism, the sheet-shaped insulating material can be heated uniformly without contact. Furthermore, the heating area can be easily increased, and the maintainability is improved. This makes it possible to sufficiently heat the sheet-shaped insulating material, improves the bonding between the layers of the wound sheet-shaped insulating material, and improves the insulating strength and mechanical strength of the inner and outer peripheral materials of the coil. The amount of insulating resin can be reduced,
Resource saving of the coil becomes possible.

According to the ninth means of the present invention, the sheet-like insulating material is heated by a light beam at the time of winding the sheet-like insulating material, and then the heated sheet-like insulating material is rolled while being pressed by a roller. By using the manufacturing method of manufacturing the coil inner peripheral material or coil outer peripheral material, sufficient heating can be performed without contacting the sheet-like insulating material, and the bonding between the layers of the wound sheet-like insulating material is improved. However, since the insulation strength and mechanical strength of the coil inner and outer peripheral materials are improved, the amount of insulating resin can be reduced, and the resources of the coil can be saved.

A tenth means of the present invention is that a sheet-like insulating material which can be adhered by heating is heated by a light beam device, and then the sheet-like insulating material mounted on the core is rolled while being pressure-formed by a roller. By using a coil inner peripheral material or coil outer peripheral material manufacturing device equipped with a take-off mechanism, sufficient heating of the sheet-like insulating material is possible without contact, and the bonding between the layers of the wound sheet-like insulating material is improved. However, since the insulation strength and mechanical strength of the coil inner and outer peripheral materials are improved, the amount of insulating resin can be reduced, and the resources of the coil can be saved.

According to the eleventh means of the present invention, the sheet-like insulating material is made of a fibrous material carrying epoxy prepreg, and the sheet-like insulating material is heated at 90 ° C. to 150 ° C.
By heating to ℃ and winding and forming the inner and outer coil materials, the bonding between the layers of the wound sheet-shaped insulating material is improved, and the insulation of the inner and outer materials of the coil is improved. Since the strength and the mechanical strength are improved, the amount of the insulating resin can be reduced, and the resources of the coil can be saved.

According to the twelfth aspect of the present invention, the sheet-like insulating material is made of a fibrous material carrying an epoxy prepreg, and the sheet-like insulating material is formed at the time of winding.
By using a coil inner peripheral material or coil outer peripheral material manufacturing device equipped with a heating device for heating to 0 ° C. to 150 ° C., the sheet-shaped insulating material can be sufficiently heated in a non-contact manner, and the wound sheet-shaped insulating material can be heated. Since the bonding between the layers of the material is improved, and the insulating strength and mechanical strength of the inner and outer peripheral materials of the coil are improved, the amount of insulating resin can be reduced, and the resource of the coil can be saved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a coil inner peripheral material winding device according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a coil inner peripheral material winding device according to a second embodiment of the present invention.

FIG. 3 is a perspective view of a coil inner peripheral material winding device according to a third embodiment of the present invention.

FIG. 4 is a perspective view of a coil inner peripheral material winding device according to a fourth embodiment of the present invention.

FIG. 5 is a perspective view of a coil inner and outer peripheral material winding device in a conventional example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 sheet-shaped insulating material 2 material holding shaft 3 heating roller 4 core 5 rotating shaft 6 pressure roller 7 pressure roller support leg 8 motor unit 9 support plate 10 support plate 11 hot air generator 12 hose 13 hot air outlet 14 radiation type Heater 15 Light beam generator 16 Optical fiber 17 Light beam emitting unit 101 Sheet-like insulating material 102 Heating / pressing roller 103 Roll core 104 Rotation axis

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Koichi Hirakawa 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Shuji Hasegawa 1006 Kadoma Kadoma, Kadoma City Osaka Pref. (72) Inventor Hirokazu Nitta 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture F-term in Matsushita Electric Industrial Co., Ltd. 5E044 AA07 AB01 AB02 AB06 AB08 AC01 CA03 CA05 CB03 CC04

Claims (12)

[Claims] When winding a sheet-like insulating material that can be adhered to the inner or outer periphery of a coil by heating, after heating the sheet-like insulating material, the heated sheet-like insulating material is pressure-formed with a roller. A method of manufacturing the coil inner and outer peripheral materials that are wound while being wound. 2. A rotating shaft for winding a sheet-like insulating material which can be adhered by heating, a winding core mounted on the rotating shaft for winding and forming the sheet-like insulating material, and heating the sheet-like insulating material. A heating device, and a roller for pressing the sheet-like insulating material wound by the core, heating the sheet-like insulating material with the heating device, and then attaching the sheet-like insulating material to the core. For manufacturing a coil inner and outer peripheral material that is wound while pressure-molding with a roller. 3. The method according to claim 1, wherein the heating of the sheet-like insulating material is performed by a heating roller. 4. The apparatus according to claim 2, wherein the heating device is a roller heating device. 5. The method according to claim 1, wherein the heating of the sheet-like insulating material that can be bonded by heating is performed by hot air. 6. The heating device according to claim 2, wherein the heating device is a hot air generator.
An apparatus for manufacturing a coil inner and outer peripheral material according to the above. 7. The method according to claim 1, wherein the heating of the sheet-like insulating material that can be bonded by heating is performed by a radiation heater. 8. The heating device according to claim 2, wherein the heating device is a radiant heater.
An apparatus for manufacturing a coil inner and outer peripheral material according to the above. 9. The method according to claim 1, wherein the heating of the sheet-like insulating material that can be bonded by heating is performed by a light beam. 10. The apparatus according to claim 2, wherein the heating device is a light beam device. 11. The sheet-like insulating material is made of a fibrous material carrying an epoxy prepreg, and is heated to 90 ° C. to 150 ° C. when the sheet-like insulating material is wound up, and then the sheet-like insulating material is wound up and formed. The method according to claim 1, 3, 5, 7, or 9. 12. After the sheet-like insulating material is made of a fibrous material carrying epoxy prepreg, and the sheet-like insulating material is heated to 90 ° C. to 150 ° C. by a heating device,
The coil inner / outer peripheral member manufacturing apparatus according to claim 2, further comprising a mechanism for winding the sheet-shaped insulating material attached to the core while pressing the sheet-shaped insulating material with a roller.