JP5881046B2 - Insulated wire manufacturing equipment - Google Patents

Description

  The present invention relates to an insulated wire manufacturing apparatus, and more particularly to an insulated wire manufacturing apparatus having a coiled coil.

  Conventionally, an enameled wire in which an insulating coating is coated on a conductor is known. Enameled wires are widely used, for example, as wiring for various electric devices and windings for motors and transformers.

  In general enameled wire, the process of applying an insulating varnish on a conductor, and the process of passing the conductor coated with the insulating varnish through a baking furnace, drying and curing the insulating varnish, and baking the insulating layer (insulating film) ) Is repeated several times until a predetermined thickness is reached.

  As a technique relating to the manufacture of enameled wire, a technique for drying enamel varnish using an induction heating means is described in, for example, Japanese Patent Application Laid-Open No. 60-136111 (Patent Document 1). In the manufacture of the enameled wire described in this publication, after enamel varnish is applied to the outside of the conductor, the solvent in the varnish coating layer is evaporated by heating with an induction heating coil, and the varnish coating layer is dried. The applied film is cured with a heater or the like.

JP-A-60-136111

  However, when an enameled wire is manufactured by the method described in JP-A-60-136111, it is necessary to individually adjust the frequency applied to the induction heating coil for drying and the current applied to the heater for curing. Therefore, the configuration of the manufacturing apparatus was complicated.

  This invention is made | formed in view of the above subjects, The objective is to provide the manufacturing apparatus of the insulated wire which can control the heating of a conductor by simple structure.

  The insulated wire manufacturing apparatus according to the present invention includes a plurality of coiled coils and a moving part. Each of the plurality of winding coils has a straight portion extending along the moving direction of the conductor. At least one of the plurality of coiled coils is a movable coiled coil in which the distance between the conductor and the straight portion can be changed. The moving part is for automatically changing the distance between the conductor and the linear part of the movable coil.

  The insulated wire manufacturing apparatus according to the present invention has a plurality of winding coils, and at least one of the plurality of winding coils is a movable winding coil in which the distance between the conductor and the straight portion can be changed. is there. Thereby, even if the same power supply is connected to a plurality of coiled coils, the heating condition of the conductor can be changed by changing the distance between the linear portion and the conductor in the movable coiled coil. Therefore, it is possible to reduce the equipment cost by sharing the power source, and it is possible to change the heating conditions for each coil.

  Preferably, the above-described insulated wire manufacturing apparatus further includes a control unit for controlling the moving unit. Thereby, the distance between the straight portion of the coil and the conductor can be adjusted with high accuracy.

  Preferably, the insulated wire manufacturing apparatus further includes a temperature sensor for measuring the temperature of the linear portion of the movable coiled coil. The control unit can move the linear part of the movable coiled coil relative to the conductor based on the temperature of the linear part of the movable coiled coil measured by the temperature sensor. Thereby, the distance between the linear portion of the coil and the conductor can be adjusted with higher accuracy.

  Preferably, the above insulated wire manufacturing apparatus further includes an application unit, a drying unit, and a curing unit. The application part is for applying an insulating paint to the conductor. The drying section is for heating the conductor coated with the insulating paint to a temperature below the boiling point of the solvent contained in the insulating paint. The curing part is for heating the conductor heated by the drying part to a temperature not lower than the boiling point of the solvent. At least one of the drying unit and the curing unit includes a movable coiled coil.

  According to the above insulated wire manufacturing apparatus, the coil along the drying section and the coil along the curing section are electrically connected to each other. Therefore, since the power source for applying a voltage to the winding coil of the drying unit and the winding coil of the curing unit can be shared, the configuration of the insulated wire manufacturing apparatus is simplified.

  Preferably, the insulated wire manufacturing apparatus includes a first application unit, a first heating unit, a second application unit, and a second heating unit. The first application part is for applying the first insulating paint to the conductor. The first heating unit is for heating the conductor coated with the first insulating paint. The second application part is for applying the second insulating paint to the conductor heated by the first heating part. The second heating unit is for heating the conductor coated with the second insulating paint. At least one of the first heating unit and the second heating unit includes a movable coiled coil.

  According to the above insulated wire manufacturing apparatus, the winding coil of the first heating unit and the winding coil of the second heating unit are electrically connected. Therefore, since the power source for applying a voltage to the winding coil of the first heating unit and the winding coil of the second heating unit can be shared, the configuration of the insulated wire manufacturing apparatus is simplified.

  As described above, according to the present invention, an insulated wire manufacturing apparatus capable of controlling the heating of a conductor with a simple configuration can be provided.

It is a schematic diagram which shows roughly the structure of the manufacturing apparatus of the insulated wire in one embodiment of this invention. It is a schematic sectional drawing (C) in alignment with the IIC-IIC line | wire of the side view (A), front view (B), and front view (B) for demonstrating the structure of a winding coil. It is a schematic diagram which shows schematically the structure which concerns on the 1st modification of the manufacturing apparatus of the insulated wire in one embodiment of this invention. It is a schematic diagram which shows schematically the structure which concerns on the 2nd modification of the manufacturing apparatus of the insulated wire in one embodiment of this invention. It is a schematic perspective view for demonstrating the structure of a moving part. It is a schematic diagram for demonstrating operation | movement of a movable coastal coil.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated. The present invention is not limited to this form.

  Referring to FIG. 1, an insulated wire manufacturing apparatus 10 according to the present embodiment is for manufacturing an insulated wire by applying an insulating paint to a conductor 11. It mainly has a die 7, a plurality of stoppers 8, a plurality of heating units 9, a transport unit 13, a control unit 15, and a temperature sensor 16. The plurality of heating units 9 have a coiled coil 200.

  Each of the plurality of application portions 6 is filled with an insulating paint such as a polyamide-imide resin varnish or a polyimide resin varnish, and the conductor 11 passes through the application portion 6 so that the outer peripheral surface of the conductor 11 has an insulating paint. It is comprised so that can be apply | coated.

  Each of the plurality of dies 7 is provided with a tapered through hole, and the conductor 11 passes through the through hole so that the thickness of the insulating coating applied to the outer peripheral surface can be adjusted. . The die 7 is configured to be movable along the moving direction of the conductor 11.

  Each of the plurality of stoppers 8 is provided on the downstream side of each of the plurality of dies 7 and is for restricting movement of each of the plurality of dies 7. Here, the downstream means that it is on the downstream side with respect to the moving direction of the conductor 11.

  Each of the plurality of heating units 9 is for drying or curing the insulating coating applied on the conductor 11. In the present embodiment, each of the plurality of heating units 9 is a coiled coil 200 disposed along the traveling direction of the conductor 11. The plurality of coiled coils 200 are electrically connected to each other through, for example, the connecting portion 17.

  2A, 2B, and 2C, the coiled coil 200 includes two linear portions 200a that extend linearly along the conductor 11 while sandwiching the conductor 11 of the conductor 11, and It consists of one copper pipe which has the curved part 200b connected to each edge part of the two linear parts 200a. The curved portion 200b is curved so as to go around the conductor 11 so as not to interfere with the conductor 11. The curved portion 200b is preferably flexible.

  Referring to FIG. 1, the power supply 14 is for applying a current to the winding coil 200. In the present embodiment, a plurality of winding coils 200 are connected in series. Therefore, a single power source 14 can apply a voltage to the plurality of winding coils 200.

  The coiled coil 200 is made of, for example, a copper tube. The copper tube has a tubular shape and has a cavity formed therein. The copper pipe is configured to be cooled so that the cooling liquid is introduced into the cavity. In the present embodiment, the cooling liquid is introduced into the cavity of the copper pipe forming the winding coil 200 from the cooling liquid supply port 21, and the cooling liquid is discharged from the cooling liquid discharge port 22, so that the cooling coil 200 can be cooled. It is configured.

  At least one of the plurality of winding coils 200 is the movable winding coil 20 configured such that the distance between the linear portion 200a of the winding coils 200 and the conductor 11 can be changed. The insulated wire manufacturing apparatus 10 of the present embodiment includes, for example, one movable coiled coil 20.

  The movable coiled coil 20 has a straight portion 20 a, a flexible portion 20 b, and a moving part 12. The straight line portion 20 a is a portion that extends along the moving direction of the conductor 11. The flexible portion 20b is connected to the linear portion 20a and has flexibility. The moving part 12 is a part for moving the straight part 20a in a direction intersecting the moving direction of the conductor 11 (for example, a direction perpendicular to the moving direction of the conductor 11). The moving unit 12 is provided, for example, near both ends of the linear portion 20a.

  Referring to FIG. 5, moving parts 12a and 12c are provided above and below one straight line part 20a, and moving parts 12b and 12d are provided above and below the other straight line part 20a. The moving parts 12a to 12d have a holding surface 121 and a sliding surface 122, for example. The holding surface 121 holds the straight portion 20 a of the movable coiled coil 20. The slide surface 122 is provided so that the rail 19 can slide. The rail 19 extends in a direction perpendicular to the extending direction of the linear portion 20a. Thereby, the moving parts 12a to 12d can move in a direction perpendicular to the direction in which the linear portion 20a extends (in other words, the traveling direction of the conductor 11). For example, the moving unit 12a and the moving unit 12c can move to the left side in the drawing, and the moving unit 12b and the moving unit 12d can move to the right side in the drawing. The flexible portions 20b and 20c are configured to be extendable and contractible. As described above, the moving units 12 a to 12 d are configured to be able to move the linear portion 20 a relative to the conductor 11.

  With reference to FIG. 1, the insulated wire manufacturing apparatus 10 of the present embodiment includes a control unit 15 for controlling the moving unit 12. For example, the control unit 15 can automatically move the moving unit 12 to a predetermined position by inputting the distance between the linear portion 20a of the movable coiled coil 20 and the conductor 11 to the computer.

  The insulated wire manufacturing apparatus 10 according to the present embodiment includes a temperature sensor 16 for measuring the temperature of the linear portion 20a of the movable coiled coil 20. The control unit 15 is configured to automatically move the linear portion 20 a relative to the conductor 11 based on the temperature of the linear portion 20 a measured by the temperature sensor 16. For example, when the temperature of the straight portion 20 a is higher than a predetermined temperature, the moving unit 12 automatically moves in a direction in which the straight portion 20 a is separated from the conductor 11.

  The transport unit 13 is for transporting the conductor 11 from the upstream side to the downstream side. The transport unit 13 allows the conductor 11 to pass through the application unit 6 and the heating unit 9.

  As will be described later, a series of operations is performed in which an insulating paint is applied to the conductor 11 by the application unit 6, the thickness of the insulating paint is controlled by the die 7, and the insulating paint is dried and cured by the heating unit 9. Is called. When the application unit 6, the die 7, the stopper 8, and the heating unit 9 are a set of application units, the insulated wire manufacturing apparatus 10 of the present embodiment has a plurality of sets of application units. . Thereby, the insulating paint can be applied to the conductor 11 a plurality of times.

Next, the operation of the movable armored coil will be described.
With reference to FIG. 6, the movable coiled coil 20 includes a straight portion 20a and flexible portions 20b and 20c. The moving part 12 is provided above and below the straight portion 20a. For example, the distance between the straight line portion 20 a and the conductor 11 is input to the control unit 15 for controlling the moving unit 12. Based on the inputted distance, the moving unit 12 moves to adjust the distance between the straight line portion 20a and the conductor 11.

  Specifically, referring to FIG. 6, moving unit 12 provided on the upper side and the lower side of left linear portion 20a moves to the left side. Moreover, the moving part 12 provided on the upper side and the lower side of the right straight portion 20a moves to the right side. As a result, the left straight portion 20a moves to the left, and the right straight portion 20a moves to the right. As a result, the width between the two straight portions 20a and 20a changes from the width WA to the width WB. In this way, the distance between the conductor 11 and the straight portion 20a changes.

Next, the manufacturing method of the insulated wire which concerns on this Embodiment is demonstrated.
With reference to FIG. 1, first, the conductor 11 passes through the coating portion 6 positioned at the uppermost stream of the movement path of the conductor 11, whereby the first layer of the insulating paint is applied to the outer peripheral surface of the conductor 11. After that, the conductor 11 to which the first layer of the insulating paint is applied passes through the tapered through hole formed in the die 7, so that the first layer of the insulating paint applied to the outer peripheral surface of the conductor 11. Is controlled to be constant. Thereafter, the conductor 11 that has passed through the through hole 5 of the die 7 moves to the heating unit 9. In the heating unit 9, the insulating paint applied on the conductor 11 is dried and cured.

  The conductor 11 to which the first-layer insulating coating is applied moves to the second application portion 6. In the 2nd application part 6, the 2nd layer insulation paint is applied on the 1st layer insulation paint. The first-layer insulating paint and the conductor 11 coated with the second-layer insulating paint thereon pass through the through-hole 5 of the second die 7. The size of the through hole 5 of the second die 7 is larger than the size of the through hole 5 of the first die 7. The conductor 11 passes through the through hole 5 of the second die 7.

  The first-layer insulating paint and the conductor 11 on which the second-layer insulating paint is applied pass through the heating unit 9 and the second-layer insulating paint is dried and cured. By repeating the coating, drying, and curing a predetermined number of times (n times: for example, 10 times), an n-layer insulating coating is applied to the outer peripheral surface of the conductor 11. As described above, the insulated wire is manufactured by applying the insulating paint to the conductor 11.

  As the insulating paint 24 used in the present embodiment, for example, a resin obtained by dissolving a constituent resin of enamel coating with a solvent is used. This constituent resin is not particularly limited as long as it has high insulating properties and high heat resistance. Specifically, a polyamide resin, a polyimide resin, a polyamideimide resin, a polyesterimide resin, or the like can be suitably used. As the solvent, N-methyl-2-pyrrolidone or cresol can be used.

  Specific examples of the conductor 11 include, for example, copper wire, copper alloy wire, tin-plated copper wire, aluminum wire, aluminum alloy wire, steel core aluminum wire, copper fly wire, nickel-plated copper wire, silver-plated copper wire, copper Examples include covered aluminum wire.

  Next, a modified example of the insulated wire manufacturing apparatus of the present embodiment will be described with reference to FIGS.

  Referring to FIG. 3, heating unit 9 of insulated wire manufacturing apparatus 10 according to Modification 1 of the present embodiment includes drying unit 3 and curing unit 4.

  The drying unit 3 is for heating the conductor 11 and the insulating paint to mainly dry the insulating paint applied on the conductor 11, and is provided on the downstream side of the stopper 8. Here, the drying of the insulating paint means heating to a temperature at which the solvent contained in the insulating paint is vaporized and the insulating paint is not cured. The drying unit 3 is, for example, an induction heating type movable coiled coil 20.

  The drying unit 3 includes two straight portions 20a and a flexible portion 20b that connects the two straight portions 20a. Moving parts 12 are provided at both ends of the straight line portion 20a. The moving unit 12 is configured to be able to change the distance d1 between the linear portion 20a and the conductor 11.

  The curing unit 4 is for heating the conductor 11 and the insulating paint in order to mainly cure the insulating paint on the conductor 11. Here, curing the insulating paint means heating to a temperature higher than the temperature at which the insulating paint is cured. This hardening part 4 is, for example, an induction heating type movable coiled coil 20.

  The hardening part 4 has two straight portions 20a and two flexible portions 20c. Moving parts 12 are provided at both ends of the straight line portion 20a. The moving unit 12 is configured to be able to change the distance d2 between the linear portion 20a and the conductor 11.

  Here, the distance d1 between the linear portion 20a and the conductor 11 in the drying unit 3 is configured to be larger than the distance d2 between the linear portion 20a and the conductor 11 in the curing unit 4. Thereby, the temperature of the conductor 11 in the drying part 3 becomes lower than the temperature of the conductor 11 in the hardening part 4.

  With reference to FIG. 4, the insulated wire manufacturing apparatus 10 according to Modification 2 of the present embodiment has a coating unit 6, a die 7, a stopper 8, and a heating unit 9 as one unit. It has a plurality of units. Specifically, the insulated wire manufacturing apparatus 10 according to the second modification includes a first application unit 6a, a first die 7a, a first stopper 8a, and a first heating unit 9a. A first unit, a second application unit 6b, a second die 7b, a second stopper 8b, a second unit having a second heating unit 9b, a third application unit 6c, The third unit has a third die 7c, a third stopper 8c, and a third heating unit 9c.

  The first application part 6 a of the first unit is a part for applying the first insulating paint (first insulating paint) to the surface of the conductor 11. The first heating unit 9a is a part for heating the conductor 11 to which the first insulating paint is applied. In the present embodiment, the first heating unit 9 a is composed of a movable coiled coil 20. The movable coiled coil 20 includes a straight portion 20a extending along the moving direction of the conductor 11, a flexible portion 20b, and a moving portion 12 provided at both ends of the straight portion 20a.

  The 2nd application part 6b of the 2nd unit is a part for applying the 2nd insulating paint to the conductor 11 heated by the 1st heating part 9a. More specifically, the second insulating paint is applied on the first insulating paint applied to the conductor 11. The second insulating paint may be the same material as the first insulating paint, or may be a different material.

  The second heating unit 9b is a part for heating the conductor 11 to which the second insulating paint is applied. In the present embodiment, the second heating unit 9 b includes the movable coiled coil 20. The movable coiled coil 20 includes a straight portion 20a extending along the moving direction of the conductor 11, a flexible portion 20b, and a moving portion 12 provided at both ends of the straight portion 20a.

  Similarly, the 3rd heating part 9c is a part for heating the conductor 11 with which the 3rd insulating coating material was apply | coated by the 3rd application part 6c. In the present embodiment, the third heating unit 9 c is composed of the movable coiled coil 20. The movable coiled coil 20 includes a straight portion 20a extending along the moving direction of the conductor 11, a flexible portion 20b, and a moving portion 12 provided at both ends of the straight portion 20a.

  The first heating part 9a and the second heating part 9b are electrically connected at the connection part 17, and the second heating part 9b and the third heating part 9c are also electrically connected at the connection part 17. ing. That is, the 1st heating part 9a, the 2nd heating part 9b, and the 3rd heating part 9c are connected in series.

  Further, the distance d3 between the linear portion 20a and the conductor 11 in the first heating unit 9a of the present embodiment is configured to be larger than the distance d4 between the linear portion 20a and the conductor 11 in the second heating unit 9b. The distance d4 between the linear portion 20a and the conductor 11 in the second heating unit 9b is configured to be larger than the distance d5 between the linear portion 20a and the conductor 11 in the third heating unit 9c. For example, when a current of 200 A is applied to a movable coil along a φ3 mm pipe with a distance d3 of 1 mm, a distance d4 of 1.5 mm, and a distance d5 of 2 mm, the conductor 11 that is a copper wire of φ2.6 mm The rate of temperature rise is 86 ° C. per second, 55 ° C. per second and 45 ° C. per second, respectively.

  In the present embodiment, the first heating unit 9a, the second heating unit 9b, and the third heating unit 9c all have the movable coiled coil 20, but the first heating unit 9a, At least one of the second heating unit 9b and the third heating unit 9c may be the movable coiled coil 20.

Next, the effect of the insulated wire manufacturing apparatus according to the present embodiment will be described.
The insulated wire manufacturing apparatus 10 according to the present embodiment includes a plurality of winding coils 200, and at least one of the plurality of winding coils 200 can change the distance between the conductor and the straight portion. This is a movable coiled coil 20. Thereby, even if the same power supply is connected to the plurality of coiled coils 200, the heating condition of the conductor 11 can be changed by changing the distance between the straight portion 20 a and the conductor 11 in the movable coiled coil 20. Therefore, it is possible to reduce the facility cost by sharing the power source, and it is possible to change the heating condition for each coil 200.

  Moreover, the insulated wire manufacturing apparatus 10 according to the present embodiment can automatically change the distance between the conductor 11 and the straight portion 20a of the movable coiled coil 20. Therefore, the heating condition of the conductor 11 can be adjusted to a desired condition.

  Furthermore, the insulated wire manufacturing apparatus 10 according to the present embodiment includes a control unit 15 for controlling the moving unit 12. Thereby, the distance between the linear portion 20a of the movable coiled coil 20 and the conductor 11 can be adjusted with high accuracy.

  Furthermore, the insulated wire manufacturing apparatus 10 according to the present embodiment further includes a temperature sensor 16 for measuring the temperature of the linear portion 20a of the movable coiled coil 20. The controller 15 can move the linear portion 20 a of the movable coastal coil 20 relative to the conductor 11 based on the temperature of the linear portion 20 a of the movable coastal coil 20 measured by the temperature sensor 16. Thereby, the distance between the linear portion 20a of the movable coiled coil 20 and the conductor 11 can be adjusted more accurately.

  Furthermore, in the insulated wire manufacturing apparatus 10 according to the present embodiment, the movable coiled coil 20 of the drying unit 3 and the movable coiled coil 20 of the curing unit 4 are electrically connected to each other. Therefore, since the power source for applying a voltage to the movable coiled coil 20 of the drying unit 3 and the movable coiled coil 20 of the curing unit 4 can be shared, the configuration of the insulated wire manufacturing apparatus 10 is simplified. .

  Furthermore, in the insulated wire manufacturing apparatus 10 according to the present embodiment, the movable coiled coil 20 of the first heating unit 9a and the movable coiled coil 20 of the second heating unit 9b are electrically connected. Therefore, it is possible to share a power source for applying a voltage to the movable coiled coil 20 of the first heating unit 9a and the movable coiled coil 20 of the second heating unit 9b. The configuration of is simplified.

  The embodiment disclosed this time is to be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  3 Drying unit, 4 curing unit, 6 coating unit, 7 dice, 8 stopper, 9 heating unit, 10 manufacturing device, 11 conductor, 12 moving unit, 13 transport unit, 14 power supply, 15 control unit, 16 temperature sensor, 17 connection Part, 19 rail, 20 movable side coil, 20a, 200a linear part, 20b, 20c flexible part, 21 coolant supply port, 22 coolant outlet, 121 holding surface, 122 slide surface, 200 side coil, 200b Curved part.

Claims (5)

A plurality of coiled coils each having a straight portion extending along the direction of movement of the conductor;
At least one of the plurality of coiled coils is a movable coiled coil in which a distance between the conductor and the linear portion can be changed.
An apparatus for manufacturing an insulated wire, comprising: a moving unit for automatically changing a distance between the conductor and the linear portion of the movable coiled coil.   The insulated wire manufacturing apparatus according to claim 1, further comprising a control unit for controlling the moving unit. A temperature sensor for measuring the temperature of the linear portion of the movable coiled coil;
The said control part can move the said linear part of the said movable coastal coil with respect to the said conductor based on the temperature of the said linear part of the said movable coastal coil measured by the said temperature sensor. Insulated wire manufacturing equipment. An application portion for applying an insulating paint to the conductor;
A drying section for heating the conductor coated with the insulating paint to a temperature below the boiling point of the solvent contained in the insulating paint;
A curing part for heating the conductor heated by the drying part to a temperature equal to or higher than the boiling point of the solvent;
The insulated wire manufacturing apparatus according to any one of claims 1 to 3, wherein at least one of the drying unit and the curing unit includes the movable coiled coil. A first application portion for applying a first insulating paint to the conductor;
A first heating unit for heating the conductor coated with the first insulating paint;
A second application unit for applying a second insulating paint to the conductor heated by the first heating unit;
A second heating unit for heating the conductor coated with the second insulating paint,
The insulated wire manufacturing apparatus according to any one of claims 1 to 3, wherein at least one of the first heating unit and the second heating unit includes the movable coiled coil.

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