WO2017203801A1

WO2017203801A1 - Device for manufacturing coated wire

Info

Publication number: WO2017203801A1
Application number: PCT/JP2017/010207
Authority: WO
Inventors: 貴行近藤; 正紀深田
Original assignee: 株式会社Tkx
Priority date: 2016-05-24
Filing date: 2017-03-14
Publication date: 2017-11-30
Also published as: SG11201804316UA; JPWO2017203801A1; TW201741056A; JP6271825B1

Abstract

Provided is a device for manufacturing a coated wire in which a coating core wire is heated while being passed through a hollow part of a transparent tube, wherein clouding of the transparent tube is inhibited and the problem of a decrease in production efficiency due to replacement of the transparent tube is eliminated. This invention is provided with: an application means (6) for applying a coating paste onto a core wire (4); a running means for running the coated core wire (8), onto which the coating paste has been applied, upwards; a heating means (10) for irradiating the running coated core wire (8) with heat rays and causing the applied coating paste to harden; a transparent tube (16) through which the coated core wire (8) is inserted, the transparent tube (16) surrounding at least the portion of the coated core wire (8) irradiated with the heat rays; and an airflow formation means (18) provided at the lower end part in the transparent tube (16), the airflow formation means (18) feeding a gas introduced from a compressed gas source to the hollow part of the transparent tube (16).

Description

Covered wire manufacturing equipment

The present invention relates to a coated wire manufacturing apparatus such as a resin bond wire saw (a wire saw in which abrasive grains are fixed to a wire with a resin adhesive). In particular, the present invention is a fixing used for slicing of materials for solar cells / electronic substrates, compound semiconductor substrates such as gallium arsenide, and magnetic / optical substrates such as magnetic materials, quartz, and glass, represented by silicon ingots. The present invention relates to an abrasive wire saw manufacturing apparatus.

Resin bond wire saws are manufactured by curing a paint by heating while running a coated core wire coated with a paint paste containing abrasive grains. It is disclosed that an enamel wire baking furnace (for example, Patent Document 1) or an image furnace (for example, Patent Document 2) is used for heating.

There are two types of enamel wire baking furnaces: an electric heating furnace method and a hot air circulation method. In the electric furnace method, an electric heater is provided in the baking chamber to heat the inside of the apparatus. In the hot air circulation method, the baking chamber is configured by a part of the hot air circulation path, and a large amount of hot air is circulated in the baking apparatus. In any method, the traveling speed of the coated core wire is limited, and it is difficult to perform heat treatment at a high speed of, for example, 100 m / min.

The heat treatment using an image furnace is a system in which heat rays (infrared rays) radiated from a heat source are condensed using a curved reflector or the like, and the coating core wire is caused to travel to the focal point. This method enables heat treatment at a high speed of 100 m / min or more. In this method, in order to prevent the reflecting surface from being clouded by volatiles from the paint paste generated when the coated core wire is heated, the traveling coated core wire is covered with a transparent tube. However, when this volatile matter reaches the inner peripheral surface of the transparent tube, a phenomenon occurs in which the inner peripheral surface condenses, and the inner peripheral surface becomes contaminated and cloudy. When the inner peripheral surface is clouded, the heat rays (infrared rays) radiated from the heating source are prevented from passing through the wall of the transparent tube, making it difficult for the coating core wire to be heated and reducing the efficiency of the heat treatment. It was. Further, once the inner peripheral surface of the transparent tube is contaminated, it is necessary to replace and clean the transparent tube, and there is a problem that the production efficiency is lowered due to frequent replacement of the transparent tube.

Patent Document 1 Japanese Patent No. 3078020 Patent Document 2 Japanese Patent No. 5792208

The present invention is a manufacturing apparatus for manufacturing a coated wire such as a resin bond wire saw by heating a coated core wire while passing through a hollow portion of a transparent tube. An object of the present invention is to provide an apparatus for manufacturing a covered wire, which eliminates the problem of performing.

As a result of intensive studies to solve the above-mentioned problems, the present inventors sent resin rectified to the inner peripheral surface of the lower end portion of the transparent tube, so that the resin bond is accompanied with the traveling of the coating core wire. The inventors have found that a coated wire such as a wire saw can be efficiently produced, and have completed the present invention.

The coated wire manufacturing apparatus of the present invention includes a coating means for applying a paint paste to a core wire, a running means for running the coated core wire coated with the paint paste upward, and irradiating the traveling coating core wire with heat rays. A heating means for curing the applied paint paste, a transparent cylinder that passes through the coating core wire and surrounds at least the portion of the coating core wire that is irradiated with heat rays, and is provided at the lower end of the transparent cylinder and introduced from a compressed gas source An air flow forming means for sending out the gas to the hollow portion of the transparent cylinder, and an opening is formed between the air flow forming means and the inner peripheral surface of the transparent cylinder along the inner peripheral surface. The gas is sent out to the hollow portion of the transparent tube by the airflow forming means.

In the coated wire manufacturing apparatus of the present invention, the airflow forming means includes a baffle plate having a diameter smaller than the inner diameter of the transparent tube, and the outer peripheral surface of the baffle plate is relatively opposed to the inner peripheral surface of the transparent tube through a gap. The gap is an opening.

Further, in the coated wire manufacturing apparatus of the present invention, the airflow forming means includes a baffle plate located at the upper end, a cylindrical intermediate material portion having a smaller diameter than the baffle plate, a pedestal portion that supports the intermediate material portion, and an inner diameter that is intermediate. It consists of a cylindrical side wall part that is larger than the diameter of the outer peripheral surface of the material part and whose outer diameter is less than or equal to the diameter of the baffle plate, and the intermediate material part is erected from the center part of the pedestal part and is arranged coaxially with the baffle plate Is interposed between the pedestal and the baffle plate, the side wall surrounds the intermediate member and is erected on the upper surface of the pedestal on the same axis as the outer peripheral surface of the intermediate member, and the side wall has an upper edge. The pedestal is connected to the lower surface of the baffle plate, and the pedestal is provided with a mounting surface on which the transparent tube is mounted, so that a gap is formed between the inner peripheral surface of the transparent tube to be mounted and the outer peripheral surface of the side wall. Introduced into the space surrounded by the baffle plate, the intermediate material part, the pedestal part, and the side wall part at the bottom part and arranged coaxially with the side wall part A plurality of outlets penetrating the side wall portion inward and outward are formed in the side wall portion so as to make a round in the circumferential direction, and vertically penetrate the shafts of the baffle plate, the intermediate material portion, and the pedestal portion. The insertion hole through which the coating core wire is inserted is formed.

Further, the coated wire manufacturing apparatus of the present invention is characterized in that the axial direction of the outlet is oblique to the radial direction of the transparent tube.

Further, the coated wire manufacturing apparatus of the present invention is characterized in that the outlet is continuously opened in the circumferential direction.

Further, in the covered wire manufacturing apparatus of the present invention, the pedestal portion is provided with a guide tube that is erected in the vertical direction and is arranged coaxially with the axis of the intermediate member portion. It is characterized in that the outer peripheral surface of the cylinder is guided so as to be inserted and removed in the vertical direction.

The coated wire manufacturing apparatus of the present invention is characterized in that the heating means disposed near the outer periphery of the transparent tube uses a heat source that emits infrared rays.

Furthermore, the coated wire manufacturing apparatus of the present invention is characterized in that the heating means is a plurality of image furnaces arranged in the vertical direction.

According to the present invention, it is possible to prevent the inner peripheral surface of the transparent cylinder surrounding the coating core wire from being contaminated by the volatile matter generated when the coating core wire is heated and cured. And the stable production can be continuously performed without reducing the heating efficiency when the coated core wire is heated and cured by the heating means. Moreover, it is possible to produce without reducing the production efficiency by reducing the frequency of replacement and cleaning of the transparent tube.

(A) The cross-sectional schematic diagram which looked at the front view which shows the aspect of the manufacturing apparatus of the coated wire of this invention. (B) The cross-sectional schematic diagram which shows the aspect of the airflow formation means of this invention. The schematic diagram which shows the inside of the airflow formation means of the manufacturing apparatus of the covered wire shown in FIG. The schematic diagram which shows the inside of the other aspect of the airflow formation means of the manufacturing apparatus of the covered wire | line shown in FIG. FIG. 3 is a sectional end view of the airflow forming means shown in FIG. 2. FIG. 5 is a cross-sectional end view of the air flow forming means shown in FIG. FIG. 5 is a cross-sectional end view of the airflow forming unit shown in FIG. FIG. 5 is a cross-sectional end view of the air flow forming means shown in FIG. Sectional end view which shows the other aspect of the airflow formation means of the manufacturing apparatus of the covered wire | line shown in FIG. Sectional end view which shows the other aspect of the airflow formation means shown in FIG. FIG. 10 is a cross-sectional end view of the air flow forming means shown in FIG. FIG. 10 is a cross-sectional view of the airflow forming unit shown in FIG. Sectional end view which shows the other aspect of the airflow formation means shown in FIG.

A coated wire manufacturing apparatus according to an embodiment of the present invention will be described below.

The coated wire manufacturing apparatus according to the present embodiment is a device for manufacturing a resin bond wire saw in which abrasive grains are fixed to the surface of a core wire through a resin.

FIG. 1 (a), (b) shows an example of the aspect of the coated wire manufacturing apparatus of the present invention. In addition, the same code | symbol shown over each figure shows the same or the same thing.

As shown in FIGS. 1 (a) and 1 (b), a coated wire manufacturing apparatus 2 according to this embodiment includes an application means 6 for applying a paint paste to a core wire 4, and an applied core wire 8 formed by applying the paint paste. From the bottom to the top (arrow 3), traveling means (not shown), heating means 10 for heating the applied coating core wire 8 to cure the applied coating paste, and heating means 10 for heating. And a transparent tube 16 surrounding the heated portion of the coating core wire 8. The transparent cylinder 16 is erected with the traveling axis of the coating core wire 8 as an axis. At the lower end of the transparent tube 16, airflow forming means 18 for introducing compressed gas from the outside, rectifying it, and sending the gas into the transparent tube 16 is provided. An insertion hole 26 through which the coating core wire 8 is inserted and travels is provided at the center of the airflow forming means 18. Reference numeral 12 denotes a guide roll that guides the traveling of the core wire 4 and the coating core wire 8.

The heating means 10 is preferably a heat source that emits heat rays, and examples thereof include a halogen lamp and an infrared lamp. In particular, the heat source using the infrared ray is preferable as the heat source of the heating means 10, and by irradiating the infrared ray, the chemical reaction of curing the adhesive composition contained in the paint paste is effectively accelerated. Therefore, compared with the case where the resin is cured by heating with hot air or the like, the curing reaction is performed at a higher speed, and a uniform higher-order structure of molecules can be obtained. In addition, since the image furnace can reflect the heat rays by the reflecting curved plate and collect the light at the position of the coating core wire 8, the heating efficiency is good, and it is preferable that a plurality of image furnaces are arranged along the traveling direction of the core wire 4. . As the image furnace, for example, an infrared gold image furnace (registered trademark “Gold Image”) manufactured by Advance Riko Co., Ltd. is used.

The heating means 10 is provided in three stages in this embodiment. In the lowermost heating means 10, the coating core wire 8 is heated to evaporate volatiles such as an organic solvent. The middle heating means 10 evaporates the remaining volatiles and fires the coated core wire 8. The upper heating means 10 sufficiently calcinates the coated core wire 8 and bakes and hardens the resin containing abrasive grains on the core wire 4. The temperature of the heating means 10 from the lower stage to the upper stage may be constant, but the temperature may be set higher from the lower stage to the upper stage in accordance with the physical properties of the coating core wire 8, or vice versa. The number of stages is not limited to three, but may be one, two, or four or more.

The transparent cylinder 16 is disposed so as to surround the coating core wire 8 so as to partition the heating means 10 and the coating core wire 8. Since the transparent tube 16 is required to transmit the heat rays irradiated from the heating means 10 to heat the coating core wire 8, a quartz glass tube is used. The transparent tube 16 is not limited to a quartz glass tube as long as it is thermally resistant and has good heat ray transmittance. The inner diameter d of the transparent cylinder 16 is 20 to 50 mm, for example.

The airflow forming means 18 includes a pedestal portion 32 at the lower end, an intermediate material portion 36 located in the middle, a side wall portion 38, and a baffle plate 28 at the upper end in the order of travel of the coating core wire 8. The broken lines drawn in the airflow forming means 18 in FIGS. 1A and 1B indicate the boundaries of each part. The axes of the pedestal 32, the intermediate member 36, the side wall 38, and the baffle plate 28 are arranged coaxially with the travel axis of the coating core wire 8. A space surrounded by the baffle plate 28, the intermediate material portion 36, the side wall portion 38, and the pedestal portion 32 is formed as an annular gas chamber 48. In addition, an insertion hole 26 is formed through the baffle plate 28, the intermediate material portion 36, and the pedestal portion 32 so as to penetrate the coating core wire 8. The airflow forming means 18 takes in the gas from the compressed gas source into the annular gas chamber 48 and rectifies it, and rectifies it into the hollow part of the transparent cylinder 16 (hereinafter referred to as “hollow part”). To send out gas. As the compressed gas source, an air compressor or an air pump is used when the gas is air, and a gas cylinder is used when the gas is nitrogen gas or the like.

The pedestal portion 32 is disposed at the lower end of the airflow forming means 18 and is provided with a placement surface 42 on which the transparent tube 16 is placed and a guide tube 44 for guiding the transparent tube 16 to the placement surface. The guide tube 44 is erected vertically with respect to the mounting surface 42 of the pedestal portion 32 with the traveling axis of the coating core wire 8 as an axis. The outer peripheral surface of the lower end part of the transparent cylinder 16 is guided by the inner peripheral surface of the guide cylinder 44 so as to be inserted / removed vertically.

The baffle plate 28 is disposed at the upper end of the airflow forming means 18 and has a diameter smaller than the inner diameter of the transparent tube 16. The upper surface of the baffle plate 28 is provided horizontally as in the radial direction of the transparent tube 16. An annular opening 20 having a gap g is disposed between the outer peripheral surface of the baffle plate 28 and the inner peripheral surface of the placed transparent cylinder 16. The rectified gas is sent from the opening 20 to the hollow portion of the transparent tube 16. The gap g is, for example, 0.5 to 2 mm. The shape of the outer edge of the baffle plate 28 may be selected according to the shape of the inner peripheral surface of the opposing transparent cylinder 16, and may be circular or polygonal. The upper surface of the baffle plate 28 is not horizontal and may be inclined or convex.

The intermediate material portion 36 has a cylindrical shape smaller in diameter than the baffle plate 28, is erected from the center of the pedestal portion 32, and is connected to the lower surface of the baffle plate 28. The side wall 38 has an inner diameter larger than that of the outer peripheral surface of the intermediate member 36, an outer diameter equal to or smaller than the outer diameter of the baffle plate 28, an upper end connected to the lower surface of the baffle plate 28, and a lower end a pedestal The upper surface of the part 32 is connected. A predetermined gap 22 is also provided between the inner peripheral surface of the transparent tube 16 and the outer peripheral surface of the side wall portion 38. The gap width of the predetermined gap 22 may be the same as the gap g of the annular opening 20, or may be small or large.

An introduction port 58 that communicates with the annular gas chamber 48 from the outside is provided at the bottom of the air flow forming means 18, and the gas is fed from the compressed gas source via a pipe joint (not shown) connected to the introduction port 58. It is introduced into the gas chamber 48. In the side wall portion 38, outlet ports 50 penetrating inward and outward are arranged in a circle at a predetermined interval in the circumferential direction (FIG. 2). The gas taken into the annular gas chamber 48 passes through the outlet 50 and is led out to the gap 22 provided between the inner peripheral surface of the transparent tube 16 and the outer peripheral surface of the side wall 38. The gas led to the gap 22 rises through the gap 22 and is sent from the annular opening 20 to the hollow portion of the transparent tube 16. The gas sent to the hollow portion from the entire circumference of the annular opening 20 rises along the inner peripheral surface of the transparent tube 16. That is, the gas sent from the annular opening 20 to the hollow portion of the transparent tube 16 forms an air flow layer parallel to the inner peripheral surface of the transparent tube 16, that is, an air curtain. The number of the inlets 58 arranged at the bottom of the airflow forming means 18 is not limited to one, and a plurality of inlets 58 may be provided. The outlet 50 provided in the side wall portion 38 is not limited to the one provided at intervals, but may be continuously opened in the circumferential direction (FIG. 3).

The compressed gas introduced into the gas chamber 48 from the introduction port 58 is once blocked by the side wall portion 38 and distributed throughout the gas chamber 48, so that the pressure is equalized over the entire circumference of the gas chamber 48, and the outlet port of the side wall portion 38. The flow velocity of the gas derived from 50 is almost the same. For this reason, the air curtain rising from the opening 20 along the inner peripheral surface of the transparent tube 16 has substantially the same flow velocity and flow rate in the entire periphery. The flow rate of the gas sent from the entire circumference of the opening 20 to the hollow portion of the transparent tube 16 is preferably 15 to 30 liters / min although it depends on the diameter of the transparent tube 16 and the like.

As the coating core wire 8 travels, accompanying airflow is brought into the hollow portion of the transparent tube 16 from the insertion hole 26. When the coating core wire 8 is heated, the volatile matter generated from the paint paste diffuses around. Volatile substances that diffuse to the surroundings rise together with the accompanying airflow around the coating core wire 8. The accompanying airflow including volatile matter increases further as the ambient temperature rises when the coating core wire 8 is heated, and rises while spreading in the radial direction of the transparent tube 16.

Examples of the gas sent to the hollow portion of the transparent tube 16 through the airflow forming means 18 include air, nitrogen, and inert gas, but air is preferable in terms of cost. At least pressurized to atmospheric pressure or higher is supplied.

As the core wire 4 of the coated wire used in the present invention, a metal wire or a resin wire is used. For the resin bond wire saw, a steel wire is preferably used, and the wire diameter is not particularly limited, but is generally 0.05 to 0.3 mm.

The paint paste applied to the core wire 4 is mainly composed of resin, abrasive grains and solvent before curing. Examples of the resin used for the resin bond wire saw include phenol resins and epoxy resins. The abrasive grains are not particularly limited as long as they are abrasive grains for a fixed-abrasive wire saw. Examples thereof include diamond abrasive grains, cubic boron nitride (CBN) abrasive grains, alumina abrasive grains, and silicon carbide abrasive grains. . A filler made of inorganic particles may be added to the paint paste. The paint paste is applied to a substantially uniform thickness by the applying means 6. As an example, after the core wire 4 is immersed in the paint paste, it is uniformly applied by passing through a die (not shown).

Next, the operation and effect of the coated wire manufacturing apparatus 2 of the present invention will be described.

One of the purposes of installation of the airflow forming means 18 is to form an air curtain that rises along the inner peripheral surface of the transparent tube 16. The air curtain obstructs the radial path of the accompanying airflow containing volatiles generated during heating from the coating paste of the coating core wire 8, and mixes the air curtain airflow and the accompanying airflow to reduce the concentration of volatiles. , Has a role of quickly discharging so as not to stay on the inner peripheral surface of the transparent tube 16.

Another purpose of the installation of the airflow forming means 18 is to capture the volatile matter generated when the coating core wire 8 is heated by the accompanying airflow brought from the insertion hole 26 as the coating core wire 8 travels, and to the outside of the transparent tube 16. It is to discharge. The flow rate of the accompanying airflow depends on the diameter of the insertion hole 26 shown in FIG. 1b. However, if the diameter is too large, the accompanying airflow becomes excessive and the heating efficiency of the coating core wire 8 is reduced. It is preferably 8 to 15 mm. The gas brought into the transparent tube 16 as an accompanying airflow is heated by the coating core wire 8 and the surrounding gas is also heated, so that the flow velocity is increased and becomes an ascending airflow. The rising airflow with the increased flow velocity captures the volatile matter generated from the paint paste and further rises while spreading in the radial direction of the transparent tube 16.

The accompanying airflow containing volatiles spreads in the radial direction of the transparent cylinder 16 as it rises, but the course in the radial direction is blocked by the air curtain rising along the inner peripheral surface of the transparent cylinder 16 to form an air curtain. It rises while mixing with the air current. The mixed airflow of the air curtain airflow and the accompanying airflow rises to the upper end of the transparent tube 16. The mixed airflow that has reached the upper end of the transparent cylinder 16 is sucked and discharged together with volatile matter from an opening at the upper end of the transparent cylinder 16 by an exhaust duct (not shown) provided in the vicinity of the opening. The exhaust duct may be directly connected to the upper end of the transparent tube 16. Thus, the accompanying airflow containing volatile matter is mixed with the airflow of the air curtain, so that the approaching and staying of the volatile matter with a high concentration to the inner peripheral surface of the transparent cylinder 16 is prevented. Since the mixed airflow of the air curtain airflow and the accompanying airflow is quickly discharged from the opening at the upper end of the transparent tube 16, adhesion of volatile substances to the entire inner peripheral surface of the transparent tube 16 is minimized. Therefore, the heat ray radiated from the heating means 10 can be produced without reducing the permeability of the transparent core 16 and without reducing the heating efficiency of the coated core wire 8.

Generally, when gas is excessively fed into the heating chamber to prevent contamination of the wall surface of the heating chamber, the heat of the workpiece is taken away by the gas, so that the heating efficiency of the workpiece is lowered. Therefore, as in the present invention, by sending the compressed gas having the minimum flow rate to the airflow forming means 18 provided at the lower end portion in the transparent tube 16, the air curtain flowing along the inner peripheral surface of the transparent tube 16, and the coating It is preferable to prevent the inner peripheral surface from being soiled by the interaction with the accompanying air flow introduced from the insertion hole 26 through which the core wire 8 travels.

Directly blowing gas over the entire surface of the inner surface of the transparent tube 16 or flowing a large amount of gas over the entire surface of the inner surface of the transparent tube 16 has the effect of preventing volatiles from adhering to the inner surface. Although a large amount of gas is introduced into the hollow portion of the transparent tube 16 and this gas hinders the temperature rise of the coating core wire 8 during heating, high-speed heat treatment cannot be performed, and the coating core wire 8 As a result, a large shake occurs and the infrared ray is not separated from the condensing part of the infrared ray so that it cannot be heated effectively. Moreover, since such an aspect is accompanied by installation of many complicated-shaped apparatuses in a hollow part, it becomes the obstruction | occlusion of the driving | running | working of the coating core wire 8. FIG.

In the present embodiment, the gas sent to the hollow portion is accompanied by the gas sent upward from the opening 20 along the inner peripheral surface of the transparent tube 16 at the lower end of the transparent tube 16 and the traveling of the coating core wire 8. In this case, only the accompanying air flow brought in from the insertion hole 26 is used, and no gas is directly blown onto the coating core wire 8, so that the influence on the heating of the coating core wire 8 and physical effects such as vibrations are minimized. Can do. In addition, the flow rate of the gas sent to the transparent tube 16 can be minimized, and the degree to which this gas hinders the temperature rise of the coating core wire 8 during heating can be reduced. Further, since the diameter of the insertion hole 26 into which the accompanying airflow is brought is suppressed to 8 mm to 15 mm, the heating process for curing the coating paste of the coated core wire 8 can be performed at a high speed of 100 m / min or more. .

Also, the coated wire manufacturing apparatus 2 of the present invention has no protrusion on the upper surface, and no gas blowing device or member is installed above the flat baffle plate 28. Therefore, it is not necessary to install a member or device for gas spraying or a member or device for controlling the flow of gas that hinders traveling or handling operation in the hollow portion of the coating core wire 8.

Referring to FIG. 4, a more preferable aspect of the airflow forming means 18 used in the present invention will be described.

As shown in FIG. 4, the airflow forming means 18a includes a baffle plate 28a located at the upper end, an intermediate member 36a, a side wall 38a, and a pedestal 32a located at the lower end. It is arranged with the travel axis as the axis. A space surrounded by the baffle plate 28a, the intermediate member 36a, the side wall 38a, and the pedestal 32a is formed as an annular gas chamber 48a. In addition, an insertion hole 26a is provided through the baffle plate 28a, the intermediate material portion 36a, and the pedestal portion 32a in the vertical direction and through which the coating core wire 8 is inserted. The upper surface of the baffle plate 28a extends horizontally in the direction perpendicular to the travel axis of the coating core wire 8, that is, in the radial direction of the transparent tube 16a. The baffle plate 28a and the inner peripheral surface of the transparent tube 16a are coaxially arranged with the traveling axis of the coating core wire 8 as the axis. As shown in FIGS. 4 and 5, an annular opening 20a having a predetermined gap g is provided between the outer peripheral surface of the baffle plate 28a and the inner peripheral surface of the transparent tube 16a.

A mounting surface 42a on which the transparent cylinder 16a is mounted is provided on the upper surface of the horizontally provided pedestal portion 32a. Furthermore, a guide tube 44a that guides and inserts the lower end portion of the transparent tube 16a is erected on the upper surface of the pedestal portion 32a with the traveling axis of the coating core wire 8 as an axis. The transparent cylinder 16a is loosely inserted inside the guide cylinder 44a and placed on the placement surface 42a. The baffle plate 28a, the intermediate member 36a, and the side wall 38a are integrally formed, and are fixed to the pedestal 32a by screws or the like. The outer edge shape of the baffle plate 28a may be selected according to the shape of the inner peripheral surface of the opposing transparent cylinder 16a, and may not be a circle shown in FIG.

As shown in FIG. 6, the side wall portion 38a is provided with a plurality of outlets 50a that penetrate in the radial direction and make a round with a predetermined interval in the circumferential direction. FIG. 6 is substantially the same embodiment as FIG. The shapes of the plurality of outlets 50a are preferably the same shape and the same size in order to equalize the flow velocity and flow rate of the gas exiting each outlet 50a. In addition, the pedestal portion 32a is provided with an inlet 58a for introducing gas from a compressed gas source such as an air pump or an air compressor into the annular gas chamber 48a (see FIG. 7).

As shown in FIG. 4, the gas introduction path is a path from the opening 20a to the inner peripheral surface of the transparent cylinder 16a through the introduction port 58a, the gas chamber 48a, the outlet port 50a, and the gap 22a. An arrow 56a indicates a gas flow. The compressed gas introduced into the gas chamber 48a from the introduction port 58a reaches the gas chamber 48a, and the pressure in the entire circumference of the gas chamber 48a becomes substantially the same. The pressure-equalized gas is led out to the gap 22a between the transparent tube 16a and the side wall 38a from a plurality of outlets 50a penetrating the side wall 38a. The gas led out to the gap 22a is sent from the annular opening 20a to the hollow portion of the transparent tube 16a, and forms an air curtain that rises along the inner peripheral surface.

As the coating core wire 8 travels, the accompanying airflow that is brought up rises while the coating core wire 8 is heated and catches volatiles generated from the coating paste. The accompanying airflow is warmed and becomes an upward airflow due to the influence of the heated coating core wire 8, and rises while spreading in the radial direction of the transparent cylinder 16a. The accompanying airflow spreads in the radial direction of the transparent cylinder 16a, but the path is blocked by the air curtain flowing upward along the inner peripheral surface of the transparent cylinder 16a, and rises while mixing with the airflow forming the air curtain. The mixed airflow of the air curtain airflow and the accompanying airflow is discharged from the opening at the upper end of the transparent tube 16a. Therefore, the accompanying airflow does not approach the inner peripheral surface of the transparent cylinder 16a with a high concentration of volatile matter, and adhesion of volatile substances to the inner peripheral surface of the transparent cylinder 16a can be minimized.

FIG. 8 shows another embodiment of the airflow forming means 18a. The airflow forming means 18a may be configured such that the through direction (axial direction) of each outlet 50b is oblique to the radial direction of the side wall 38b.

As shown in FIG. 8, a plurality of outlets 50b that horizontally penetrate the side wall 38b from the outside to the inside are arranged in a circumferential manner with a predetermined interval. The penetration direction (axial direction) of each outlet 50b is oblique to the radial direction of the side wall 38b. Thereby, the penetration direction of the outlet 50b is oblique to the radial direction of the transparent cylinder 16a. In other words, in the embodiment shown in FIG. 8, the arrangement relationship between the outlet 50b and the central axis of the transparent cylinder 16a is arranged to be similar to the arrangement relationship between the rotation shaft and the blades of the steam turbine.

With the arrangement of the outlet 50b, the gas led out from the outlet 50b is blown obliquely onto the inner peripheral surface of the transparent cylinder 16a as viewed from the radial direction of the transparent cylinder 16a, and then sent out from the annular opening 20a. The gas delivered from the opening 20a flows along the inner peripheral surface of the transparent cylinder 16a by centrifugal force to form an air curtain. The airflow that forms the air curtain rises spirally along the inner peripheral surface of the transparent tube 16a. In this aspect, the time during which the gas stays in the transparent cylinder 16a is longer than when an air curtain is formed in which the gas exiting from the opening 20a rises directly above the central axis of the transparent cylinder 16a. Therefore, since the time for capturing the accompanying airflow containing volatiles can be increased, the effect of preventing the attachment of volatiles to the inner peripheral surface when flowing the same flow rate of gas is great.

Therefore, in this embodiment, the effect of preventing the adhesion of a predetermined volatile substance is obtained with a gas having a smaller flow rate, and the degree of the gas hindering the temperature rise of the coating core wire 8 during heating is small, and the outlet 50a as shown in FIG. Compared with the case where the through direction is the radial direction of the transparent tube 16a, higher-speed heat processing is possible.

Referring to FIG. 9, another preferred aspect of the coated wire manufacturing apparatus 2 of the present invention will be described. An annular outlet 50c that opens continuously in the circumferential direction may be provided on the side wall 38b of the airflow forming means 18b. FIG. 9 is substantially the same embodiment as FIG.

Airflow forming means 18b is provided so as to surround the traveling coating core wire 8. The airflow forming means 18b includes a pedestal portion 32b, an intermediate material portion 36b, a side wall portion 38b, and a baffle plate 28b. The broken lines drawn in the airflow forming means 18b in FIG. 9 indicate the boundaries between the parts. An insertion hole 26b is formed through the baffle plate 28b, the intermediate member 36b, and the pedestal 32b in the vertical direction and through which the coating core wire 8 is inserted. A space surrounded by the pedestal 32b, the intermediate member 36b, the side wall 38b, and the baffle plate 28b is formed as an annular gas chamber 48b.

Between the lower end of the side wall part 38b and the upper surface of the base part 32b, the cyclic | annular outlet 50c which has the clearance gap m and opens continuously in the circumferential direction is provided. The pedestal portion 32b is provided with an introduction port 58b for introducing gas from the compressed gas source into the gas chamber 48b. A guide tube 44b is provided on the upper surface of the pedestal portion 32b to guide the lower end of the transparent tube 16b and place it on the mounting surface 42b. The guide tube 44 b is provided coaxially with the coating core wire 8. An annular opening 20b having a predetermined gap g is provided between the outer peripheral surface of the baffle plate 28b and the inner peripheral surface of the transparent tube 16b. (See Figure 10)

Although the cross-sectional shape of the side wall part 38b is not particularly limited, for example, it may be triangular as shown in FIG. The oblique sides of the introduction port 58b and the side wall portion 38b are arranged to face each other. As shown in FIG. 11, the intermediate member portion 36 b, the side wall portion 38 b, the baffle plate 28 b, the transparent tube 16 b and the guide tube 44 b are arranged with the traveling axis of the coating core wire 8 as the axis. The outer edge shape of the baffle plate 28b may be selected according to the shape of the inner peripheral surface of the opposing transparent cylinder 16b, and may be a polygon instead of a circle.

The gas introduction path is a path from the opening 20b to the inner peripheral surface of the transparent cylinder 16b through the introduction port 58b, the gas chamber 48b, the outlet port 50c, and the gap 22b. The gas from the compressed gas source is introduced into the gas chamber 48b from the introduction port 58b. The introduced gas hits the slope of the triangular side wall 38b, and the gas flow direction is changed to the substantially radial direction of the gas chamber 48b. The inner peripheral surface side of the side wall portion 38b, that is, the gas chamber 48b is spread with gas. The gas chamber 48b is spread with gas, and the pressure in the gas chamber 48b is substantially uniform over the entire circumference. Thereafter, rectified gas having substantially the same flow velocity is led out to the gap 22b from the annular outlet 50c below the side wall portion 38b. The gas led out to the gap 22b is further sent from the annular opening 20b to the hollow portion of the transparent tube 16b (arrow 56b). The delivered gas forms an air curtain that rises along the inner peripheral surface of the transparent tube 16b.

The accompanying airflow accompanying the travel of the coating core wire 8 is brought into the hollow portion of the transparent tube 16b from the insertion hole 26b. The accompanying airflow containing the volatile matter generated from the coating paste of the coating core wire 8 heated by the heating means 10 is further heated and increases at a higher speed. As the accompanying airflow rises, it expands in the radial direction of the transparent tube 16b. The accompanying airflow spreads in the radial direction of the transparent tube 16b, but the path is blocked by the air curtain flowing upward along the inner peripheral surface of the transparent tube 16b, and rises while mixing with the airflow forming the air curtain. The mixed airflow of the air curtain airflow and the accompanying airflow is discharged from the opening at the upper end of the transparent tube 16b. Therefore, the accompanying airflow does not approach the inner peripheral surface of the transparent cylinder 16b with a high concentration of volatile matter, and the attachment of volatiles to the inner peripheral surface of the transparent cylinder 16b can be minimized.

As another embodiment, as shown in FIG. 12, the air flow forming means 18c may be provided with an introduction port 58c that penetrates the side wall 38c in the horizontal direction from the side surface of the guide tube 44c. With such a configuration, gas can be introduced into the bottom of the gas chamber 48c.

The gas introduction path is a path from the opening 20c to the inner peripheral surface of the transparent cylinder 16c through the introduction port 58c, the gas chamber 48c, the outlet port 50d, and the gap 22c. An arrow 56c indicates a gas flow. The gas introduced from the introduction port 58c reaches the entire circumference of the gas chamber 48c, and the pressure becomes uniform. Therefore, the gas sent from the gas chamber 48c through the outlet 50d through the opening 20c has substantially the same speed on the entire circumference of the inner circumference of the transparent cylinder 16c, and the entire circumference of the inner circumference of the transparent cylinder 16c with the minimum flow rate. It is possible to effectively suppress volatiles from adhering to the surface. Moreover, since the stain | pollution | contamination to the internal peripheral surface of the transparent cylinder 16c can be prevented, it can produce, without reducing the heating efficiency of the application | coating core wire 8. FIG.

As described above, the embodiment of the present invention has been described. However, the coated wire manufacturing apparatus 2 of the present invention can suppress fogging of the transparent cylinder 16 caused by volatiles generated from the paint paste during production. In addition, there is less time and effort for cleaning and replacing the transparent tube 16, which increases production efficiency.

Furthermore, the coated wire manufacturing apparatus 2 of the present invention can be configured such that the transparent tube 16 is inserted from above into the guide tube 44 erected on the pedestal portion 32 and mounted on the mounting surface 42 (FIG. 1). ). This facilitates insertion / removal of the transparent tube 16 from the airflow forming means 18, facilitates mounting of the coating core wire 8 at the start of operation, and facilitates replacement and cleaning of the transparent tube 16.

It will be apparent to those skilled in the art that various changes and modifications can be made by those skilled in the art within the scope of the claims, and the invention is not limited to the illustrated examples. Modifications can be made as appropriate within the range described. Further, in the above embodiment, when referring to the shape and positional relationship of the component, etc., the mentioned shape, positional relationship, etc., except where it is essentially limited to a specific shape, positional relationship, etc. It is not limited to.

The coated wire manufacturing apparatus of the present invention can be applied to a heat treatment apparatus for a traveling linear workpiece such as a heating furnace for baking a coating such as an insulating resin paint on a core wire such as a conductor wire, and at high speed. High-efficiency heat treatment can be performed.

2 ... Coated wire manufacturing device 4 ... Core wire 6 ... Application means 8 ... Application core wire 10 ... Heating means 16, 16a, 16b, 16c ...

Transparent tubes

18, 18a, 18b, 18c ... -

Airflow forming means

20, 20a, 20b, 20c-

Ring openings

22, 22a, 22b, 22c-

Gap

26, 26a, 26b, 26c-

Insertion holes

28, 28a, 28b, 28c-

Baffle plate

32, 32a, 32b, 32c ..

pedestal portions

36, 36a, 36b, 36c ..

intermediate material portions

38, 38a, 38b, 38c ..

side wall portions

42, 42a, 42b, 42c .. mounting

surfaces

44, 44a, 44b, 44c ···

Guide tubes

50, 50a, 50b, 50c, 50d · ·

Outlet port

58, 58a, 58b, 58c · · Inlet port

Claims

Application means for applying a paint paste to the core wire;
Traveling means for traveling the coated core wire formed by applying the paint paste upward;
Heating means for curing the coating paste applied by irradiating the coated core wire traveling with heat rays;
A transparent tube that passes through the coated core wire and surrounds at least a portion of the coated core wire that is irradiated with the heat ray; and
An airflow forming means that is provided at the lower end in the transparent cylinder and sends out the gas introduced from the compressed gas source to the hollow part of the transparent cylinder,
An opening is formed between the air flow forming means and the inner peripheral surface of the transparent cylinder, and an opening is formed along the inner peripheral surface, and gas is sent from the opening to the hollow portion of the transparent cylinder. An apparatus for producing a coated wire, characterized in that
The airflow forming means includes a baffle plate having a diameter smaller than the inner diameter of the transparent cylinder, the outer peripheral surface of the baffle plate is opposed to the inner peripheral surface of the transparent cylinder via a gap, and the gap is formed with the opening. The coated wire manufacturing apparatus according to claim 1.
The airflow forming means includes
The baffle plate located at the upper end, a cylindrical intermediate material portion having a smaller diameter than the baffle plate, a pedestal portion supporting the intermediate material portion, an inner diameter larger than a diameter of an outer peripheral surface of the intermediate material portion, and an outer diameter A cylindrical side wall portion having a diameter equal to or less than the diameter of the baffle plate, and
The intermediate material portion is erected from the center portion of the pedestal portion, is disposed coaxially with the baffle plate, and is interposed between the pedestal portion and the baffle plate,
The side wall portion surrounds the intermediate material portion and is erected on the upper surface of the pedestal portion coaxially with the outer peripheral surface of the intermediate material portion, and the upper edge of the side wall portion is continuous with the lower surface of the baffle plate,
The pedestal is provided with a mounting surface on which the transparent tube is mounted, and is coaxial with the side wall so that a gap is formed between the inner peripheral surface of the transparent tube to be mounted and the outer peripheral surface of the side wall. Arranged,
An inlet for introducing gas from the compressed gas source into the space surrounded by the baffle plate, the intermediate material part, the pedestal part, and the side wall part is provided at the bottom part,
In the side wall portion, a plurality of outlets penetrating the side wall portion from the inside to the outside are formed around the circumferential direction at intervals.
The device for manufacturing a covered wire according to claim 2, wherein an insertion hole is formed through the baffle plate, the intermediate material portion, and the pedestal portion so as to penetrate the coating core wire.
The coated wire manufacturing apparatus according to claim 3, wherein an axial direction of the outlet port is oblique to a radial direction of the transparent cylinder.
The said lead-out port is opening continuously in the circumferential direction, The manufacturing apparatus of the covered wire | line of Claim 3 characterized by the above-mentioned.
The pedestal portion is provided with a guide tube that is erected in the vertical direction and is arranged coaxially with the axis of the intermediate member portion. The outer peripheral surface of the transparent tube is guided on the inner peripheral surface of the guide tube and is The coated wire manufacturing apparatus according to any one of claims 3 to 5, wherein the apparatus is provided so as to be insertable / removable in a direction.
The coated wire manufacturing apparatus according to any one of claims 1 to 6, wherein the heating means uses a heat source that emits infrared rays.
The coated wire manufacturing apparatus according to any one of claims 1 to 7, wherein the heating means is a plurality of image furnaces arranged in the vertical direction.