KR100965290B1 - Method for producing spiral supporting equipment - Google Patents

Abstract

The present invention provides a process of coating a metal wire core with a thermoplastic polymer material to obtain a coating wire, a step of forming a plurality of irregularities on at least one surface of the coating of the coating wire using pressure deformation means, and a metal wire core or a coating wire in a long spiral shape. It relates to a spiral supporter manufacturing method including a step of molding.

Spiral support, metal wire core, sheath, irregularities

Description

Spiral support manufacturing method {METHOD FOR PRODUCING SPIRAL SUPPORTING EQUIPMENT}

TECHNICAL FIELD The present invention relates to a spiral support for supporting an insulated wire and a manufacturing method thereof.

A conventional spiral support is first formed of a metal wire core into a long spiral curve by a die having a long spiral hole, and then the long spiral metal wire core is introduced into a cross head die of an extruder, and a polymer material on the front thereof. Insulating coating consisting of the above structure is applied, and the long spiral insulating coating wire is cut into a predetermined length, and the intermediate portion is formed into a predetermined shape such as a U-shape (see Japanese Patent Application Laid-Open No. 55-53114).

However, according to the conventional method, there was a fear that the position of the shim at the time of coating was not constant in shaping a long spiral coating line. That is, since the cross head die of the extruder is installed at a specific phase position of the long spiral metal wire core discharged from the long spiral forming die, and the sheath is formed at that specific phase position, the position of the cross head die with respect to the position of the long spiral is If it is not appropriate, shim shakes during coating, and the position of the long spiral phase and the crosshead die position may be displaced due to vibration or other causes during forming of the coating line, so that the position of the coating shim is fixed. There was a fear that the molded parts could not be formed or the seam could be partially changed.

Moreover, the problem which needs time and effort in proper positioning of a crosshead die with respect to a long spiral phase was also a subject which should be solved.

In view of the above points, an object of the present invention is to provide a method of manufacturing a spiral support and a spiral support which can prevent core shaking of the coating and also allow proper positioning of the crosshead die with respect to a long spiral phase in a short time. It is done.

1st invention of this invention is an invention regarding the manufacturing method of a helical support body, Comprising: The two-stage hole whose first half is a long spiral small hole into which a metal wire core can be inserted, and the latter half is a long spiral big hole with a larger inner diameter than the said small hole. The metal wire core is bent to form a long spiral in the first half of the die while forcibly transporting and supplying the metal wire core to the die on which the die is formed, and the polymer material is coated on the second half of the die.

2nd invention is an invention regarding the manufacturing method of a spiral support body, Comprising: The 1st process of conveying and supplying one strong metal wire core forward, The metal wire core supplied by the said 1st process is introduce | transduced into the die which formed the spiral hole, Furthermore, And a third step of forcibly passing through the die to form a spiral metal wire core, and a third step of introducing the spiral metal wire core according to the second step into the crosshead of the coating extrusion molding machine, and wrapping and covering the polymer material with a polymeric material. It is done.

The third invention relates to a method for manufacturing a spiral support tool consisting of a plurality of spiral metal wires, the first step of feeding and feeding a plurality of strong metal wire cores forward at the same speed and the spiral wire of the metal wire cores fed and transported by the first step. A second step of introducing into a die having a hole and forcing the die to pass through to form a parallel spiral metal wire core group; and introducing a spiral metal wire core group according to the second step into a crosshead of a coating extrusion machine; And a third step of enclosing and covering the polymer material to integrally collect and bind the spiral metal wire group.

A fourth aspect of the present invention relates to a method for producing a spiral support, comprising: forming a coating line by coating a thermoplastic polymer material on a metal wire core, and forming a plurality of irregularities on at least one surface of the coating by applying a pressure-deformation means to the coating of the coating wire; And a step of forming the metal wire core or the coating wire into a long spiral.

In 5th invention, the invention as described in any one of the 1st invention-the 3rd invention WHEREIN: The high molecular material or thermoplastic polymer material which coat | covers a metal wire core contains the fluorescent paint with good visibility.

A sixth invention is an invention relating to a spiral support, wherein a semiconductive terminal cap is provided on a terminal portion of a spiral support body in which a coating layer made of a polymeric material and a semiconductive material is formed on a spiral metal wire.

The first invention of the present invention relates to a method for manufacturing a spiral support, wherein the first half is a long spiral small hole in which a metal core can be inserted, and the second half is a long spiral large hole having a larger inner diameter than the small hole. The metal wire core is formed in a long spiral curve in the first half of the die while forcibly feeding and feeding the metal wire core to the formed die, and the polymer material is coated in the second half of the die, so that there is no shim on the coating. Therefore, the insulation reliability is high, the live work is very safe, and there is no need to perform the cumbersome operation of positioning the cross head die at the proper position when forming the long spiral coating.

2nd invention is an invention regarding the manufacturing method of a spiral support, Comprising: The 1st process of conveying and supplying one strong metal wire core forward, The metal wire core conveyed and supplied by the said 1st process is introduce | transduced into the die which forms a spiral hole, Next, a second step of forcibly passing through the die to form a spiral metal wire core, and a third step of introducing the metal wire core by the second step into the crosshead of the coating extrusion range, and wrapping and coating with a polymer material Since one metal wire can be formed in a spiral shape, and the coating is made by extrusion molding, an arbitrary and uniform coating layer can be obtained, thereby extending the life of the wire support and at the same time increasing the effect of preventing wire coating damage. The practical effect is great.

The third invention relates to a method for manufacturing a spiral support tool comprising a plurality of spiral metal wires, the spiral wire including a first step of feeding a plurality of strong metal wire cores forward at the same speed and supplying the spiral wires; A second step of introducing into a die forming a hole and forcing the die to pass through to form a parallel spiral metal wire core group, and a spiral metal wire core group by the second step into a crosshead of the coating extrusion machine; It is characterized by comprising a third step of encapsulating and covering with a polymer material and integrally converging the spiral metal wire group, so that a plurality of metal wires are simultaneously formed in a spiral shape by the first step and the second step, and thus the spiral metal wire group Is very easy to manufacture and the coating is by extrusion molding. It is possible to obtain an arbitrary and uniform coating layer, which can extend the life of the wire support and at the same time increase the effect of preventing the wire covering damage.

A fourth aspect of the present invention relates to a method for manufacturing a spiral support, comprising: applying a thermoplastic polymer material to a metal wire core to obtain a coating wire; and applying pressure deformation means to the coating of the coating wire to provide a plurality of irregularities on at least one surface of the coating. And a step of forming a metal wire core or a sheath in a long spiral shape, and since a large number of irregularities are provided on the inner side of the long spiral of the sheath, the frictional engagement force with the electric wire is large, and thus, a larger electric wire holding force ( Wire support capacity) can be obtained. Moreover, since the unevenness | corrugation is provided by the pressure deformation of a coating | cover, it can manufacture at low cost.

According to the fifth aspect of the invention, the polymer material or thermoplastic polymer material coated on the metal wire core contains a fluorescent paint with good visibility, so that no obstacles are caused in the air. It can be notified and can be used in places where power transmission lines are installed or in airfields.

Since the sixth invention is an invention relating to a spiral support, a semiconductive terminal cap is provided on a terminal portion of a spiral support body provided with a coating layer made of a polymeric material and a semiconductive material on a spiral metal wire. It can have a semi-conductive outer shell integrated with and can prevent the occurrence of tracking, and at the same time can be very easy and inexpensive to manufacture.

Next, embodiment of this invention is described based on drawing. FIG. 1 is a schematic diagram of a device for feeding and feeding a strong metal wire core 2 wound on a drum 1 to the front side (right direction in the drawing). In Fig. 1, reference numeral 5 denotes a feed roller, which is arranged in pairs up and down, respectively, and is supplied by inserting a metal wire core 2 into a groove which is driven by a driving device (not shown) and installed in the periphery. Here, 3 is a guide roller, and 4 is a calibration roller.

Then, when the feed rollers 5 are rotated, the metal wire core 2 is sent forward, that is, in the direction of the guide tube 7.

Next, the metal wire core 2 supplied by the above process is introduced into the die 8 in which the long spiral two-stage holes are formed, and the steel wire core 2 is forced through the die 8 to form a long spiral metal wire. The metal wire is coated with a polymer material. That is, in FIG. 2, the die 8 is provided with a spiral two-stage hole 81 that is long in the longitudinal direction. The first half of the long spiral two-stage hole 81 is a long spiral small hole 82 in which the metal wire core 2 is fitted, and the second half is a long spiral large hole 83 having a larger inner diameter than the long spiral small hole 82. . In this long spiral large hole 83, a covering material introduction hole 84 communicating with the extruder main body 6 is provided near the step portion with the long spiral small hole 82, and is extruded from the extruder main body 6. The molten polymer material such as polyethylene, vinyl chloride, synthetic rubber and the like is extruded into the long spiral large hole 83 through the coating material introduction hole 84.

In addition, as shown in FIG. 3, the die 8 consists of a metal outer cylinder B and a metal core C, and the long spiral two-stage hole 81 contacts the metal outer cylinder B and the core C. As shown in FIG. It is preferably formed along the surface.

Therefore, the metal wire shim 2 forcibly supplied by the metal wire shim feeder is bent and formed into a long spiral in the first half of the die 8, that is, in the long spiral small hole 82, and the second half of the die 8. It is covered by the portion, that is, the long spiral large hole 83, and becomes the long spiral covering line 10, and is discharged | emitted from the die 8.

At this time, the long spiral large hole 83 can be formed in any cross-sectional shape. In other words, if the long spiral metal wire core discharged from the long spiral small hole 82 can be enclosed and covered, the cross-sectional shape of the long spiral large hole 83 can be formed in various shapes such as a circle, a semicircle, and an ellipse. Do.

One embodiment of a long spiral sheath 10 is shown in FIG. 4. It is preferable that the coating | cover 11 is formed in the thickness which has insulation which can withstand electric wire voltage, and 1 mm-3 mm thickness is suitable normally.

Although not shown, it is preferable to provide a preheating device (apparatuses such as energizing heating, induction heating, infrared heating, hot air heating, etc.) of the metal wire cores 2 at appropriate positions. The spirally wound wire 10 thus obtained is cooled by the cold cutting device 9 while being cut into desired dimensions, and bent as necessary to the main part, if necessary, to produce a spiral support.

5 shows an example of the spiral support A manufactured according to the manufacturing method according to the present invention. In this example, the long spiral-shaped covering line 13 is loosened in the long spiral of the middle portion 14, and is bent in a folded shape in the middle portion 14. The spiral support A engages the bent intermediate portion 14 with a columnar fixing device, and the long spiral legs 15 and 15 are wound around the wire in an alternately engaging manner to fix the wire. Since the long spirals 16, 16 ... and the sheath 17 are formed by one die 8, there is no shim in the sheath 17, so that the insulation is highly reliable and live work In addition, it is extremely safe and in the shaping of the long spiral-coated wire 13, it is not necessary to perform a complicated operation of arranging the cross head die at an appropriate position.

Moreover, although having provided one metal wire core as an elongate spiral coating line, this long spiral coating line may be equipped with several parallel metal wire cores, and the die in this case is a plurality of parallel spiral small holes in the first half, and the latter half The part becomes one long spiral large hole of a shape in which a plurality of large holes larger than the small hole on the spiral communicate with each other.

This manufacturing method is demonstrated below.

FIG. 6 is a schematic diagram of an apparatus for feeding and feeding three tough metal wires 22a, 22b, 22c wound on drums 21, 21, 21 to the front (rightward direction with respect to the drawing) at the same speed. In this figure, 25, 25a, 25b, 25c, and 25d are arranged in a pair of up and down as feed rollers, respectively, and grooves 26 are provided in the periphery, and metal wires 22a, 22b, 22c in the grooves 26. ) And feeds it through. These feed feed rollers 25, 25a, 25b, 25c, 25d are driven at the same circumferential speed by a drive device not shown. Of the five sets of feed rollers, the front and back two sets of feed rollers 25 and 25d act to hold the three metal wires 22a, 22b and 22c almost evenly, and the three sets of feed rollers 25a, 25b and 25c in the center position. ) Acts to sandwich one metal wire (25a is 22a, 25b is 22b, 25c is 22c). These feed rollers 25, 25a, 25b, 25c, and 25d move up and down in response to fluctuations in the minute outer diameter of the metal wires 22a, 22b, and 22c (change within an allowable error), and effectively the metal wires 22a. , 22b, 22c). In addition, although the above is an example of the most preferable apparatus which conveys and supplies a some metal wire, a conveyance supply apparatus is not limited to this. Reference numerals 23 and 23 denote guide rollers, and reference numerals 24 and 24 denote calibration rollers.

In addition, when the feed rollers 25, 25a, 25b, 25c, and 25d are rotated at a constant circumferential speed by a driving device (not shown), the metal wires 22a, 22b and 22c move forward at the same speed, that is, the guide pipe 27. Feeds in the direction (first process).

Next, the metal wires 22a, 22b and 22c conveyed and supplied by the first step are introduced into the die 28 in which the spiral holes are formed, and are forced through the die 28 to form a parallel spiral metal wire group. (Second step). That is, in FIG. 7, reference numeral 28 is a die and is provided close to the guide tube 27, and in the die 28, three spiral holes 281, 281, and 281 along the longitudinal direction are identical to the same axis image. The inner diameter and the pitch are provided. Therefore, the conveyed and supplied metal wires 22a, 22b, and 22c are bent into spiral spirals having the same inner diameter and the same pitch by the spiral holes 28l, 281, and 281, respectively, to form a parallel spiral metal wire group 29, and die 28 Is discharged from

Next, the spiral metal wire group 29 is introduce | transduced into the crosshead of a coating extrusion molding machine, and it encloses and coat | covers with a polymeric material, and concentrates the spiral metal wire group 29 integrally (3rd process).

As a coating extrusion machine, the well-known extrusion molding machine 31 used for electric wire coating etc. is used, and the cross head 32 of the extrusion molding machine 31 is arrange | positioned at the exit side of the die 28. As shown in FIG. Therefore, when the spiral metal wire group 29 discharged from the die 28 passes through the cross head 32 in turn, the coating 30 made of a polymer material such as polyethylene, vinyl chloride, synthetic rubber, etc. is formed on the entire surface thereof. The spiral metal wire group 29 is integrally focused by this. The coating 30 is preferably formed to a thickness having insulation capable of withstanding wire voltage, and typically 1 mm to 3 mm thick.

Although not shown in the drawing, preheating devices (apparatuses such as energizing heating, induction heating, infrared heating, hot air heating, etc.) of the metal wires 22a, 22b, and 22c in place, and appropriate cooling are provided at positions subsequent to the crosshead 32. It is desirable to install the device.

The converging body 33 of the spiral metal wire obtained in this way is cut to a desired dimension, and the wire support is manufactured by bending the main part as necessary and according to the use.

An example of the wire support A manufactured by FIG. 8 by this invention is shown. In this example, in the spiral focusing body 33, the spiral of the intermediate portion 35 is unfolded again so that each of the metal wires 22a, 22b, 22c of the intermediate portion 35 is straight, and the intermediate portion ( In (35), it is bent in a folded shape. This wire support A engages the folded intermediate portion 35 to the columnar anchoring device, while the spiral legs 38 and 38 are wound around the wire alternately in engagement, but the sheath 30 ) Is obtained by extrusion molding, so that an arbitrary and uniform coating layer can be obtained. Therefore, as shown in Fig. 8B, the inner surface of the spiral of the sheath 30 is made into a wide smooth surface, and at the back of the helix of the sheath 30, U is provided between the metal wires 22a, 22b, and 22c. The grooves 37 and 37 are provided, and the metal wires 22a, 22b, and 22c can be formed in a flexible structure. In the embodiment of FIG. 8, the metal wires 22a, 22b, and 22c are hardly (relatively) freed from each other by the U-grooves 37 and 37, and thus free of the metal wires 22a, 22b, and 22c. By uniformly adhering the entire surface to the surface of the electric wire and having a very large width and a smooth surface in contact with the electric wire, it is possible to obtain an advantage of not damaging the electric wire coating than the conventional product. Reference numerals 39 and 39 are caps installed in the terminal to avoid exposure of the metal wires 22a, 22b, and 22c.

9 shows another embodiment of the wire support B according to the present invention, for intermediately supporting the wire to the pin insulator. In this example, in the converging body 33 of the spiral metal wire, the intermediate portion 40 is bent in a semicircle, and the spiral portions 41 and 41 extend in opposite directions to each other. This wire support B is fitted with the middle portion 40 fitted to the neck of the pin insulator, the spiral sections 42 and 42 are wound around the wire, respectively, and the wire is tightly wound around the pin insulator. As shown in FIG. 3, fins 43 and 43 are provided on both sides of the inner surface of the spiral, and the width of the inner surface of the spiral is further widened. Thus, the effect of not damaging the electric wire coating can be obtained.

According to the present invention, since a plurality of metal wires are simultaneously formed in a spiral shape by the first step and the second step, the manufacture of the group of spiral metal wires is very easy, and since the coating is by extrusion molding, an arbitrary and uniform coating layer can be obtained. In addition, the life of the wire support can be extended, and the effect of preventing damage to the wire coating can be further enhanced.

Next, another manufacturing method in this invention is demonstrated with reference to FIG. In FIG. 10, the metal wire shim 52 released from the winding drum D is immediately coated with a thermoplastic polymer material on the surface thereof by a cross head 111 of the extrusion machine 56, Moreover, it cools by the water cooling tank 57, and turns into the coating line 61 of linear form. Reference numerals 62 and 62 denote a pair of caterpillars and pull the covering line 61 therebetween.

Either (or both) of the caterpillar 62, 62 is formed with a plurality of irregularities on the surface in contact with the covering line 61 and a plurality of at least one surface of the covering line 61 drawn by the caterpillars 62, 62 Unevenness | corrugation is formed and the coating line 61 turns into the coating line 161 with an unevenness | corrugation.

The uneven coated wire 161 is once wound on the winding drum MD or directly supplied to a well-known long spiral forming apparatus 63, and a plurality of irregularities are provided on the inner side of the long spiral by the apparatus 63. An elongated spiral sheathed wire 162 is formed, cut into a predetermined length by a cutting device (not shown), and bent to an intermediate portion as necessary to form a spiral wire supporter A.

Fig. 11 is a partial perspective view of the spiral wire supporter molded as described above, and the metal wire core 72 is formed with a node, and the unevenness of the sheath 121 is made up of a plane and a conical protrusion 171.

12 is a spiral wire in the case where a plurality of spiral wire supports are provided (three in the figure) of metal wire cores 72, 72, and 72, and the unevenness of the sheath 121 is a flat and pyramidal protrusion 172. Partial perspective view of the support.

Next, the semi-conductive terminal cap provided in the terminal part of the spiral wire support body main body in this invention is demonstrated using FIG. 13 and FIG. In FIG. 13, reference numeral 201 denotes a spiral wire support, and the semiconductive terminal caps 205 and 2055 are provided on the support body 202 provided with a coating layer 204 made of a polymer material on the spiral metal wire 203. Is installed. In addition, although the support body was mentioned as the thing for the intermediate | middle wire support which provided the bending part 221 for insulator engagement in the middle part of the longitudinal direction, and the wire recommendation spiral parts 222 and 222 in the both ends, respectively, It may be a fixture, a line spacer, the thing for preventing an electric wire fall, the thing for winding an electric wire, etc. in some cases. In addition, although the coating layer 204 has an elliptical cross section, other cross-sectional shapes may be used.

The semiconducting terminal caps 205 and 205 are formed by injecting a semiconductive material containing a conductive material made of carbon powder, metal powder, or the like into a polymer material such as vinyl chloride, polyethylene, synthetic rubber, or the like. The contact surface with) is preferably a flat surface or a circular arc surface close to the plane so as to contact the electric wire in a large area as possible.

The spiral wire supporter 201 provided with the semiconductive terminal caps 205 and 205 having the above-described configuration engages, for example, the bent portion 221 for insulator engagement with the neck of the columnar pin insulator, and has the spiral portions 222 and 222. ) Is wound around the wire C, respectively, but at this time, as shown in FIG. 14, the contaminant damage portions B2 and B2 are formed along the spiral portion 222 of the support 201, and the passage of the leakage current Even if formed, since the terminal of the support 201 is semiconducting in a wide range by the semiconductive terminal cap 205, the electric field concentration is alleviated and the leakage current is dispersed, so that no tracking occurs. As described above, according to the present invention, by providing the semiconductive terminal caps 205 and 205 in the support body 202, it is possible to prevent the occurrence of tracking, and as compared with the prior art in which the semiconductive layer is provided on the coating layer. There is an effect that manufacture is extremely easy and can be made cheap.

It is needless to say that various embodiments can be taken without departing from the spirit of the invention. For example, in the present invention, the fixed support for the wire support has been described as an example, but needless to say, the wire support can also be implemented for the wire intermediate support, the line spacer, the rushing rod, and the like.

In addition, when the fluorescent material is contained in the polymer material or the thermoplastic polymer material coated on the metal wire core described above, the coating surface is reflected at night, indicating that there is an obstacle.

After using the apparatus for feeding and supplying the strong metal wire core 2 wound on the drum 1 shown in FIG. 1, the metal wire core 2 is sent forward, that is, in the direction of the guide tube 7, and then supplied. After introducing the metal wire core 2 into the die 80 provided with the long spiral hole 801 shown in FIG. 16, while forcibly passing the die 80 to form a long spiral metal wire, this long spiral metal wire The manufacturing method which introduce | transduces into the coating | cover material extrusion die 601 of the coating material extruder 60 shown in FIG. 15 can be provided.

That is, in FIG. 15, a molten polymer material such as polyethylene, vinyl chloride, synthetic rubber, etc., extruded from the coating material extruder 60 may be introduced into the coating material extrusion die 601 through the coating material introduction hole 602. Can be.

At this time, the coating material extrusion die 601 can be formed in arbitrary cross-sectional shape. In other words, the cross-sectional shape of the coating material extrusion die 601 can be implemented in various shapes such as a circle, a semicircle, and an ellipse as long as it is a shape that can surround and cover the long spiral metal wire core discharged from the die 80.

In addition, the die 80 shown in FIG. 16 consists of the metal outer cylinder B and the metal core C, and the long spiral hole 801 is formed along the contact surface of the metal outer cylinder B and the core C. As shown in FIG. desirable.

1 is a side view of a metal wire core feed supply device.

It is a side view of a long spiral coating wire manufacturing apparatus.

3 is a perspective view of a die.

4 is a plan view and a side view of a long spirally coated line.

5 is a plan view showing one embodiment of a spiral wire support according to the present invention.

6 is a schematic diagram for carrying out the first step of the present invention.

7 is a plan view of an apparatus for carrying out the second and third processes of the present invention.

8 is a diagram illustrating an example of an electric wire supporter.

9 is a diagram illustrating an example of an electric wire supporter.

10 is a schematic diagram of an apparatus for practicing the present invention.

11 is a partial perspective view of the spiral wire supporter.

12 is a partial perspective view of the spiral wire supporter.

13 is a plan view showing one embodiment of a spiral wire support.

14 is a partial perspective view of a use state.

It is a side view of a long spiral coating wire manufacturing apparatus.

16 is a perspective view of a die.

** Description of symbols for the main parts of the drawing **

1: drum

2: metal wire core

3: guide roller

4: straightening roller

5: conveying roller

6: extruder body

7: guide

8: die

9: cooling cutting device

10: long spiral sheath

11: cloth

Claims (1)

Coating the thermoplastic polymer material on the metal wire core 2 to obtain a linear covering wire 61; Next, a pair of caterpillars 62 and 62 which are in contact with both sides of the covering line 61 and in contact with the covering line and are provided with a plurality of irregularities are formed to press-deform the cover of the covering line. Forming a plurality of irregularities on at least one surface of the coating, Next, the manufacturing method of the spiral support body containing the process of shape | molding a metal wire core (2) or a coating wire in a long spiral.

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