JP4167529B2 - Metal wire manufacturing equipment - Google Patents

Description

【００９１】
表１に示すように、接触角が１０°以上である場合には、円板の直径が約２００ｍｍφで回転数が３０００ｒｐｍ〜７０００ｒｐｍといった高速回転であっても、９時間以上の成形が可能であり、しかも、歩留まりが８０％〜９４と良好である。これに対し、接触角が０°や５°といった接触角では、成形可能時間も短く（３．１〜７．６時間）、また、歩留まりも６０％〜７４％と低い。
【００９２】
次に、円板の回転数が５０００ｒｐｍの時の接触角と成形時間との関係をより詳細に測定した（図６参照）。なお、図６において、四角の点は、スクレーパの外周面と円板との間に堆積した除去済み付着物による円板の傷つきが原因で、溶融金属の飛散が発生し、装置を停止したものを示しており、三角の点は、測定の便宜上の装置を停止させたが、実際には、まだ成形が可能であったものを示している。
【００９３】
これより、１０°以上４５°以下の接触角とした場合、１０°を下回る接触角或いは４５°を越える接触角とした場合と比べて、顕著に成形可能時間が向上していることがわかる。
【００９４】
表２は、接触角が３０°、円板の回転数が３０００ｒｐｍ〜７０００ｒｐｍとした時の成形時間及び歩留まりの測定結果を示す表である。なお、測定の便宜上、成形時間を約９時間で装置を停止させているが、実際には、記載の成形時間を超えても成形が可能な状態であった。
【００９５】
【表２】

【００９６】
図６に示した測定結果では、円板の回転数を５０００ｒｐｍとしたが、表２に示すように、円板の回転数を３０００ｒｐｍ〜７０００ｒｐｍの間で変化させても、円板とスクレーパとの接触角によって、成形可能時間及び歩留まりの測定結果に同様の傾向があることがわかった。
【００９７】
これは、接触角θ１，θ２が１０°以上４５°以下であれば、スクレーパ１１，１２の円板６の回転の進行方向後方の側面１１ｂ，１２ｂと外周面１１ｃ，１２ｃとのコーナー部１１ｄ，１２ｄにより、円板６の周縁６ａに付着した付着物Ｘを削ぎ取るように除去できるためであると考えられる。また、本実施形態では、スクレーパ１１，１２と円板６との接触角θ１，θ２が１０°以上４５°以下と鋭いため、スクレーパ１１，１２と円板６との間に除去された付着物Ｘが挟まり難い。したがって、スクレーパ１１，１２の外周面１１ｃ，１２ｃに除去された付着物Ｘが突き刺さり難いため、除去済み付着物Ｘによる円板６への傷つけを抑制できるものと考えられる。
【００９８】
以上により、本実施形態の金属細線製造装置によれば、接触角が０°の場合と比べて、成形可能時間及び歩留まりを向上させることができる。
【００９９】
また、スクレーパ１１，１２は真円ではないため、スクレーパ１１，１２と円板６との接触が弱い部分があり、この接触が弱い部分で極くまれに円板６に付着した付着物Ｘを除去できない場合がある。こうした場合でも、本実施形態の製造装置によれば、スクレーパ１１，１２が接触角を持って配置されているため、円板６の付着物Ｘを良好に除去することができる。
【０１００】
すなわち、例えば、スクレーパ１２と円板６との間に隙間があるためスクレーパ１２で除去できなかった円板６の付着物Ｘは、スクレーパ１２が接触角を持って配置されているため、スクレーパ１２と円板６との間に挟まることなく通過する。そして、この付着物Ｘは円板６とともに回転し、スクレーパ１１と円板６とが接触する際、或いは、スクレーパ１２と円板６とが再び接触する際に除去することができる。
【０１０１】
なお、本発明の細線製造装置は、上述した実施形態に限定されるものではない。本発明の細線製造装置では、スクレーパの数は任意である。また、スクレーパの配置位置はスクレーパ同士或いは他の部品と互いに干渉しない位置であればどこでもよい。さらに、スクレーパを上方から俯瞰した状態におけるスクレーパの中心軸と円板の回転軸とのなす角度や傾斜角も任意である。
【０１０２】
さらに、第１〜第４の実施形態では、スクレーパを円板状としたが、スクレーパは必ずしも円板状でなくてもよく円弧状の外周面を有していればよい。すなわち、スクレーパは、扇形（中心角が０°以上３６０°以下となる円の一部）であってもよい。
【０１０３】
【発明の効果】
以上のように、この発明によれは、溶融金属の飛散を抑制できる金属細線製造装置が得られる。
【図面の簡単な説明】
【図１】 本発明の第１の実施形態に係る金属細線製造装置を示す断面図。
【図２】 図１中II−II線に沿う金属細線製造装置の一部の断面図。
【図３】 本発明の第２の実施形態に係る金属細線製造装置の円板及びスクレーパ近傍を示す側面図。
【図４】 図３の金属細線製造装置の円板及びスクレーパ近傍を図４の矢印Ｄの方向から見た側面図。
【図５】 本発明の第３の実施形態に係る金属細線製造装置の円板及びスクレーパ近傍を示す側面図。
【図６】 スクレーパの接触角と成形時間との関係を示す図。
【符号の説明】
６…円板、６ａ…周縁、６ｂ…先端部、６ｅ，６ｆ…傾斜面、７…金属材料、７ａ…溶融金属、１０，１１，１２…スクレーパ、２７…回転軸、４０…スクレーパ送り機構、Ｌ１，Ｌ１１，Ｌ１２…中心軸、Ｌ２１，Ｌ２２…接触部から円板の回転の進行方向後方に伸びる円板の接線の一部をなす線分[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fine metal wire production apparatus for producing fine metal wires.
[0002]
[Prior art]
Conventionally, a molten metal extraction method is known as a method for producing a thin metal wire. In this molten metal extraction method, a fine metal wire is produced as follows. First, a rod-shaped metal material is arranged above or below a disk whose edge is a sharp edge. The molten metal is formed by melting the tip portion of the metal material, and the metal material is moved toward the disk. And while rotating a disk at high speed, the periphery of a disk is made to contact a molten metal continuously, a part of molten metal is quenched, and it flies in the tangential direction of a disk. By doing in this way, a metal fine wire is manufactured.
[0003]
By the way, in the metal fine wire manufacturing apparatus to which the molten metal extraction method is applied, there are chips, dents, or scratches on the order of microns on the periphery of the disk. If chips, dents, or scratches present on the periphery of the disk are extremely small, these do not significantly affect the production of fine metal wires.
[0004]
However, a part of the molten metal is easily caught and attached to a chip, a dent, or a flaw of a certain size existing at the periphery of the disk. And the deposit | attachment (a part of molten metal) adhering to the periphery of a disk in this way gives a big impact to this molten metal when the periphery of a disk contacts with a molten metal, and obstructs manufacture of a metal fine wire. I will give you. Therefore, it is not preferable to leave the adhering molten metal as it is in terms of manufacturing the fine metal wire.
[0005]
For this reason, such a thin metal wire manufacturing apparatus is known that includes a disk-shaped scraper that removes deposits adhering to the periphery of the disk. The scraper is formed by laminating cotton cloth and stitching the entire surface of the laminate. This scraper is rotatably arranged so that its central axis is parallel to the rotation axis of the disk. The rotation direction of the scraper is the same as the rotation direction of the disc.
[0006]
Moreover, as a scraper used for another apparatus (alloy slab manufacturing apparatus), conventionally, a scraper made of metal (bimetal) and formed in a knife edge shape is known. (For example, refer to Patent Document 1).
[0007]
[Patent Document 1]
Japanese Patent Laid-Open No. 8-294533 (paragraphs 0014 to 0032, FIG. 2)
[0008]
[Problems to be solved by the invention]
In recent years, in order to improve productivity, in the metal fine wire manufacturing apparatus, the number of rotations of the disk has been increased. Accordingly, a scraper provided in the metal fine wire manufacturing apparatus is required to be able to satisfactorily remove deposits attached to the disk while suppressing damage to the disk.
[0009]
That is, deposits remaining on the periphery of the disk and scratches on the periphery of the disk, as described above, impact the molten metal when it rotates with the disk and contacts the molten metal. And the impact which the deposit | attachment remaining on the periphery of a disc and the damage | wound attached to the periphery of a disc exert on a molten metal becomes so large that the rotation speed of a disc is large. When the diameter of the disk is about 200 mmφ, if the rotation speed of the disk is about 3000 rpm, the deposits remaining on the periphery of the disk and the scratches on the periphery of the disk will not significantly impact the molten metal. It is difficult to scatter the molten metal. On the other hand, when the rotational speed of the disk exceeds approximately 3000 rpm, the impact on the molten metal due to deposits remaining on the periphery of the disk and scratches on the periphery of the disk increases, and as a result, the molten metal Will be scattered. In other words, in a metal fine wire manufacturing apparatus in which the rotational speed of the disc exceeds approximately 3000 rpm, if deposits remain or are damaged on the periphery of the disc, the production of the metal fine wire is hindered by the scattering of the molten metal. It may end up.
[0010]
Conventionally known metal knife-edge scrapers may damage the peripheral edge of the disk, and therefore are not preferable to be applied to a metal fine wire manufacturing apparatus.
[0011]
On the other hand, a scraper made of a disc-shaped cotton fabric laminate is softer than a scraper made of metal, so it is hard to damage the periphery of the disk, but it can remove the adhering matter attached to the periphery of the disk even though it is very small. There may not be.
[0012]
Furthermore, in the metal fine wire manufacturing apparatus provided with the scraper made of the disk-shaped cotton cloth laminate, the central axis is arranged in parallel with the rotation axis of the disk, so that the removed deposits are the outer peripheral surface of the scraper. Easy to pierce. For this reason, there exists a problem that the removed deposit stuck in the outer peripheral surface of a scraper will damage the periphery of a disc.
[0013]
That is, the adhering matter adhering to the periphery of the disc is removed so as to pierce the outer peripheral surface of the scraper at the contact portion where the scraper and the periphery of the disc contact. The removed deposit is carried to the contact portion where the scraper and the peripheral edge of the disk come into contact again by the rotation of the scraper, and is sandwiched by the contact portion and damages the disk.
[0014]
This invention is made | formed based on such a situation, and it aims at providing the metal fine wire manufacturing apparatus which can suppress scattering of a molten metal.
[0015]
[Means for Solving the Problems]
The apparatus for producing a fine metal wire according to the present invention has a peripheral edge that is rotationally driven in a fixed direction by a rotational drive mechanism and is brought into contact with the molten metal, and a part of the molten metal is brought into contact with the molten metal. Is provided so as to be in contact with the peripheral edge of the disk and a disk that rapidly cools and flies in the tangential direction of the peripheral edge to form a fine metal wire. , Consisting of a molded fiber molded from organic fibers, One or more scrapers for removing deposits formed by adhering the molten metal to the disc from the disc, and the scraper, A circular or arc-shaped outer peripheral surface provided around the central axis, one side surface positioned on the front side in the rotational direction of the disk with respect to the peripheral edge of the disk, and the peripheral edge of the disk A corner portion where the outer peripheral surface and the other side surface face the peripheral edge of the disc and the outer peripheral surface and the other side surface intersect each other. In contact with the periphery of the disc Thus, the center axis of the scraper is arranged in a twisted positional relationship with respect to the rotation axis of the disk.
[0016]
In the present invention, the “center axis of the scraper” refers to a straight line that passes through a position that is substantially perpendicular to both side surfaces of the scraper and that is the center of curvature of the arc that forms the outer peripheral surface. Further, “the scraper's central axis is arranged in a torsional positional relationship with respect to the rotational axis of the disc so that the side surface of the scraper faces the periphery of the disc” means that the scraper's central axis and the disc The angle α (0 ° ≦ α ≦ 90 °) between the central axis and the rotation axis in a state where the rotation axis is not parallel to or intersects with the scraper and viewed from above the scraper is 0 ° <α ≦ 90. It means that it becomes °.
[0017]
According to this fine metal wire manufacturing apparatus, the scraper is arranged so that the central axis of the scraper is in a torsional positional relationship with respect to the rotating shaft of the disk. Therefore, the deposit removed from the peripheral edge of the disk by the scraper at the contact portion where the scraper and the peripheral edge of the disk come into contact mainly sticks to the side surface of the both sides of the scraper that is behind the direction of rotation of the disk. In this way. Thereby, since the amount of the removed deposit stuck into the outer peripheral surface of the scraper can be reduced, the peripheral edge of the disk due to the removed deposit stuck in the outer peripheral surface of the scraper is suppressed.
[0018]
Further, in the present invention, as described above, by removing the adhering matter adhering to the disc as much as possible so that it sticks into the side surface of the scraper (the side surface behind the direction of rotation of the disc). Scratches on the periphery are suppressed. For this reason, the side surface of the scraper should be directed to the peripheral side of the disc as much as possible. That is, the value of the angle α is preferably 45 ° ≦ α ≦ 90 °, and most preferably 90 °.
[0019]
In practicing this invention, the scraper is preferably arranged so that the corner portion between the side surface and the outer peripheral surface at the rear in the direction of rotation of the disc is in contact with the tip of the peripheral edge of the disc.
[0020]
When the scraper is provided with one scraper and has a pair of inclined surfaces along the circumferential direction and the tip portion is tapered toward the outer side in the circumferential direction, the scraper is It is good to arrange | position so that the said front-end | tip part may be contact | connected.
[0021]
In addition, when a plurality of scrapers are provided and the peripheral edge of the disk has a pair of inclined surfaces along the circumferential direction and the tip end portion is tapered toward the outer side in the circumferential direction, at least Two scrapers of the plurality of scrapers are arranged such that one is in contact with the tip of the peripheral edge and the vicinity thereof from one inclined surface side of the pair of inclined surfaces, and the other is the pair of inclined surfaces. It is good to arrange | position so that the front-end | tip part of the said periphery and its vicinity may be contacted from the other inclined surface side.
[0022]
In that case, the two scrapers are rotatably provided, and the rotation direction at the contact portion with the disk of the scraper disposed so as to be in contact with the tip portion and the vicinity thereof from the one inclined surface side, The direction of rotation at the contact portion of the scraper that is arranged so as to approach the tip portion side from one inclined surface side and to contact the tip portion and the vicinity thereof from the other inclined surface side It is desirable that the direction from the other inclined surface side approaches the tip end side.
[0023]
Further, the scraper has a central axis of 10 degrees or more with respect to a line segment that forms a part of a tangent of the disk extending from the contact portion between the scraper and the disk in the direction of rotation of the disk. It is preferable to arrange so as to be inclined at an angle of 45 degrees or less.
[0024]
Moreover, it is preferable to provide a scraper feed mechanism that moves the scraper in a direction toward the center side of the disk so that the scraper and the disk are in contact with each other. By providing this scraper feed mechanism, even if the scraper wears out due to contact with the disc, the scraper is always moved toward the center of the disc so that the scraper and the disc come into contact with each other. Good contact with the disk, that is, good removal function of the deposits can be obtained.
[0025]
In that case, the scraper feed mechanism is controlled by any one or more of, for example, a rotation time of the disk, a torque current applied to a rotation drive mechanism that rotationally drives the disk, or a load applied to the scraper. Can be done.
[0026]
Further, the scraper may be rotationally driven by a rotational drive mechanism. In that case, the scraper feed mechanism is applied to, for example, the rotation time of the disk, the torque current applied to the rotation drive mechanism that rotates the disk, the torque current applied to the rotation drive mechanism that rotates the scraper, or the scraper. It can be controlled by any one or more of the loads.
[0027]
Here, the scraper feed mechanism is controlled by the rotation time of the disc so that the scraper feed mechanism moves the scraper by a predetermined amount toward the center of the disc every predetermined rotation time of the disc. It means that it is controlled.
[0028]
In addition, as the scraper wears due to contact with the disc and the contact area between the scraper and the disc decreases, the load applied to the disc and the scraper decreases. In other words, the torque current associated with the disc rotational drive mechanism is reduced or the torque current associated with the scraper rotational drive mechanism is reduced, which means that the contact resistance between the disc and the scraper is reduced. Yes.
[0029]
Therefore, the scraper feed mechanism is controlled by the torque current applied to the disk rotation drive mechanism when the torque current applied to the disk drive mechanism falls below a predetermined value. This means that it is controlled to move in the direction toward the center side of the disk.
[0030]
Similarly, the scraper feed mechanism is controlled by the torque current applied to the scraper rotation drive mechanism when the torque current applied to the scraper drive mechanism falls below a predetermined value. This means that it is controlled to move in the direction toward the center side of the plate.
[0031]
Furthermore, the fact that the load applied to the scraper main body is small means that the contact resistance between the disc and the scraper is small. Therefore, when the scraper feed mechanism is controlled by the load applied to the scraper, the scraper feed mechanism is controlled so as to move the scraper toward the center of the disk by a predetermined amount when the load applied to the scraper falls below. It means that it is done.
[0032]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2.
[0033]
As shown in FIG. 1, the metal fine wire manufacturing apparatus includes a chamber 2 that can be sealed. Inside the chamber 2, a cylindrical holder 3 that functions as a holding means for a rod-like (for example, round rod-like) metal material 7 that is a material of a thin metal wire to be manufactured, and a tip portion of the metal material 7 are melted. A high-frequency induction coil 4 that functions as a heating means for forming the molten metal 7a, a cooler 5 such as a cooling jacket, a disk 6 that is rotationally driven in a certain direction (the direction indicated by arrow A in the figure) by a rotational drive mechanism 25, and A scraper 10 or the like is provided. In addition, an exhaust device (not shown), an inert gas supply device, and the like are attached to the chamber 2 so that the inside of the chamber 2 can be maintained in a vacuum atmosphere or an inert gas atmosphere.
[0034]
The disc 6 is made of, for example, a metal having a high thermal conductivity such as copper (Cu) or a high melting point material such as molybdenum (Mo) or tungsten (W). Moreover, the diameter of the disc 6 is about 200 mmφ, for example.
[0035]
The disk 6 has a peripheral edge 6a that is brought into contact with the molten metal 7a (see FIG. 2) from above. As shown in FIG. 1, the peripheral edge 6a has a substantially perfect circular shape when the disk 6 is viewed from the front. Further, the peripheral edge 6a has a pair of inclined surfaces 6e and 6f along the circumferential direction when the disc 6 is viewed from the thickness direction, and is formed so as to taper outward in the circumferential direction. In the present embodiment, as shown in FIG. 2, the peripheral edge 6 a is an edge sharply sharpened in a V shape over the entire circumference of the disk 6 when the disk 6 is viewed from the thickness direction.
[0036]
The holder 3 is made of a heat resistant material such as ceramics. The holder 3 has a function of preventing the rod-shaped metal material 7 from moving in the lateral direction (radial direction) and guides the metal material 7 so that the metal material 7 can smoothly move upward (in the direction indicated by the arrow B). It plays a role as a guide member.
[0037]
The metal material 7 can be moved upward (in the direction indicated by the arrow B) toward the peripheral edge 6 a of the disk 6 at a desired speed by the material supply mechanism 20. The material supply mechanism 20 includes, for example, a roller 21 as shown in FIG. 1 or an actuator that can move in the vertical direction (for example, a linear motion mechanism that combines a motor, a ball screw, a linear movement guide member, and the like). ing. A seal portion 22 is provided at a location where the metal material 7 penetrates the bottom wall 2 a of the chamber 2. When the metal material 7 is disposed above the disc 6, the holder 3 and the cooler 5 may be omitted.
[0038]
The high frequency induction coil 4 is provided at a position surrounding the upper end portion of the metal material 7 held by the holder 3. The high frequency induction coil 4 is connected to a high frequency generator 23 as a power source for supplying a high frequency current. Further, a radiation thermometer 24 for detecting the temperature of the molten metal 7a in a non-contact manner is provided inside the chamber 2.
[0039]
As shown in FIG. 2, the chamber 2 is provided with a rotation drive mechanism 25 for rotating the disk 6. An example of the rotation drive mechanism 25 includes a motor 26 provided outside the chamber 2, a rotation shaft 27 that connects the output shaft 26 a of the motor 26 and the disk 6, and a portion where the rotation shaft 27 penetrates the side wall 2 b of the chamber 2. A sealing portion 28 for sealing is provided. The motor 26 rotates the disk 6 in a fixed direction (direction indicated by an arrow A) at a high speed of, for example, about several thousand revolutions per minute, for example, 3000 prm or more.
[0040]
In this metal fine wire manufacturing apparatus, the tip 6b of the metal material 7 is melted to form the molten metal 7a, and the tip 6b of the peripheral edge 6a is continuously attached to the molten metal 7a while rotating the disk 6 at high speed. A part of the molten metal 7a is blown in the tangential direction of the disk 6 and rapidly cooled to form a fine metal wire. Therefore, the thin wire | line collection | recovery part 29 is provided in the direction which a metal thin wire | line flys.
[0041]
By the way, in the metal thin wire manufacturing apparatus, since there are chips, dents, or scratches on the order of microns on the peripheral edge 6a of the disk 6, when the metal thin wire manufacturing apparatus is operated to manufacture the metal thin wire, one of the molten metal 7a is obtained. The portion is caught by a chip, a dent, or a scratch on the peripheral edge 6 a of the disk 6 and adheres to the peripheral edge 6 a of the disk 6.
[0042]
For this reason, this thin metal wire manufacturing apparatus is configured such that one disc-shaped scraper 10 that removes the deposit X adhering to the peripheral edge 6a of the disc 6 is brought into contact with the tip 6b of the peripheral edge 6a. It is provided above.
[0043]
The chamber 2 is provided with a rotation drive mechanism 30 for rotating the scraper 10. An example of the rotation drive mechanism 30 includes a motor 31 provided outside the chamber 2, a rotation shaft 32 that connects the output shaft 31 a of the motor 31 and the scraper 10, and a portion where the rotation shaft 32 penetrates the side wall 2 d of the chamber 2. A sealing portion 33 for sealing is provided. The rotation drive mechanism 30 rotates the scraper 10 in a certain direction.
[0044]
The direction of rotation of the scraper 10 may be the direction indicated by the arrow C1 in FIG. 2 or the direction indicated by the arrow C2. In this embodiment, the scraper 10 is rotationally driven in the direction of arrow C2, for example. Note that the scraper 10 may not be driven to rotate.
[0045]
As a material of the scraper 10, for example, a fiber molded body obtained by solidifying and molding organic fibers such as natural fibers and synthetic fibers using a binder or the like can be suitably used.
[0046]
In the scraper 10, the side surfaces 10 a and 10 b of the scraper 10 face the peripheral edge 6 a of the disc 6, and the positional relationship of the twist of the center axis L 1 (rotary shaft 32) of the scraper 10 with respect to the rotating shaft 27 of the disc 6. It is arranged to become. In the present embodiment, as shown in FIGS. 1 and 2, the scraper 10 is arranged so that the angle α formed by the central axis L <b> 1 and the rotary shaft 27 when viewed from above the scraper 10 is 90 °. .
[0047]
In addition to this condition, the scraper 10 is disposed such that the corner portion 10d between the side surface 10b and the outer peripheral surface 10c in the rearward direction of rotation of the disc 6 is in contact with the tip portion 6b of the peripheral edge 6a of the disc 6. . At this time, the scraper 10 is disposed directly above the disc 6, that is, so that the central axis L <b> 1 of the scraper 10 is on a surface passing through the tip 6 b of the peripheral edge 6 a.
[0048]
Note that the position and area of the contact portion where the scraper 10 and the disk 6 are in contact with each other vary within a certain range due to the bending or wear of the scraper 10. Therefore, if the corner portion 10d is a corner portion having an angle of 90 °, it is preferable because the deposit X attached to the disk 6 can be removed so as to be peeled off. However, the corner portion d is a curved surface with rounded corner portions. It is good.
[0049]
Further, the scraper 10 is placed in the center of the disc 6 so that the outer peripheral surface 10c of the scraper 10 and the tip 6b of the peripheral edge 6a of the disc 6 are always in good contact with the chamber 2 even if the scraper 10 is worn. A scraper feed mechanism 40 is provided that moves in a direction toward the side.
[0050]
The scraper feed mechanism 40 includes, for example, a feed device 41, a connection member 42 that connects the feed device 41 and the rotating shaft 32 of the scraper 10, and a seal portion that seals a portion where the connection member 42 penetrates the upper wall 2 c of the chamber 2. 43 etc. are comprised. A support portion 42 a that rotatably supports the rotating shaft 32 of the scraper 10 is provided at the distal end portion of the connecting member 42. The scraper feed mechanism 40 is configured to rotatably support the scraper 10 via the connecting member 42 and to move the scraper 10 linearly, for example, in a direction toward and away from the disk 6 by the feed device 41. Has been.
[0051]
In order to keep the scraper 10 and the disk 6 in contact with each other, the operation of the scraper feed mechanism 40 is performed, for example, by a rotation time (for example, total rotation time) of the disk 6 or a rotation driving mechanism 25 that drives the disk 6 to rotate. The control unit 44 is controlled by any one or more of the torque current, the torque current applied to the rotation drive mechanism 30 that drives the scraper 10 to rotate, and the load applied to the scraper 10.
[0052]
In the present embodiment, for example, the scraper feed mechanism 40 is controlled by the rotation time of the disk 6. That is, a timer that can measure and store the rotation time of the disk 6 is provided in the control unit 44 as shown in FIG.
[0053]
The timer 44a is less expensive than a torque current measuring device that measures the torque current applied to the rotation drive mechanism 25 that rotates the disk 6 or a device that measures the load applied to the scraper 10. Therefore, it is preferable to control the scraper feed mechanism 40 according to the rotation time of the disc 6 in that the control of the scraper feed mechanism 40 can be realized at low cost.
[0054]
Next, the operation of the metal fine wire manufacturing apparatus will be described.
The rod-shaped metal material 7 is inserted from below the boulder, and the material supply mechanism 20 is driven so that the upper end portion of the metal material 7 is located at the high frequency coil. The disc 6 is rotated by a rotation drive mechanism 25 in a constant direction and at a constant rotation speed (number of rotations per hour). By heating the upper end portion of the metal material 7 by the high frequency induction coil 4, the molten metal 7 a is formed at the upper end of the metal material 7. In this state, the metal material 7 is moved toward the front end 6b of the peripheral edge 6a of the disk 6 by the material supply mechanism 20 at a predetermined speed. The material supply speed at this time is set according to the rotational speed of the disk 6 or the like so that the fine metal wire to be manufactured has a desired wire diameter.
[0055]
The molten metal 7a in contact with the peripheral edge 6a of the disk 6 is rapidly cooled and solidified with the rotation of the disk 6 and continuously flies in the tangential direction of the disk 6 as a thin metal wire. Is housed in. The temperature of the molten metal 7a is constantly detected by the radiation thermometer 24, and the temperature detection signal of the molten metal 7a is fed back to the high frequency generator 23, whereby the output of the high frequency generator 23 is adjusted and the molten metal 7a is adjusted. The temperature of 7a is kept constant.
[0056]
At the same time as the production of the fine metal wires as described above, the deposit X attached to the peripheral edge 6 a of the disk 6 by being caught by the tip 6 b of the peripheral edge 6 a of the disk 6 is removed by the scraper 10.
[0057]
At this time, if the deposit X remains on the peripheral edge 6a of the disk 6, an impact is applied to the molten metal 7a when the peripheral edge 6a of the disk 6 contacts the molten metal 7a. And the molten metal 7a is scattered, and manufacture of a metal fine wire is prevented.
[0058]
Compared with the conventional metal wire manufacturing apparatus provided with the scraper 10 arranged so that the direction of the central axis L1 of the scraper 10 is parallel to the direction of the rotating shaft 27 of the disc 6 in the metal wire manufacturing apparatus of the present embodiment. It was confirmed that the time and yield for forming the fine metal wire were increased.
[0059]
This is because the center axis L1 (rotary shaft 32) of the scraper 10 is twisted with respect to the rotational shaft 27 of the disc 6 so that the side surfaces 10a, 10b of the scraper 10 face the peripheral edge 6a of the disc 6. This is considered to be because the removed deposit X is removed so as to pierce the side surface 10b on the rear side in the rotation direction of the disk 6 out of the side surfaces 10a and 10b of the scraper 10. That is, by arranging the scraper 10 so that the center axis L1 and the rotating shaft 27 of the disc 6 are in a torsional positional relationship, the amount of the deleted deposit X that pierces the outer peripheral surface 10c of the scraper 10 is reduced. Can do.
[0060]
Moreover, the scraper 10 is arranged so that the corner portion 10d between the side surface 10b and the outer peripheral surface 10c in the rearward direction of the rotation of the disc 6 is in contact with the tip portion 6b of the peripheral edge 6a of the disc 6. Therefore, the deposit X adhering to the peripheral edge 6a of the disc 6 is peeled off by being pushed out to the side surface 10b side of the scraper 10 by the corner portion 10d of the scraper 10. The deposits thus removed remain on the side surface 10b of the scraper 10 and hardly enter the contact portion and be pinched. Therefore, it is difficult to pierce the outer peripheral surface 10 c of the scraper 10.
[0061]
When the deposit X sticks into the scraper 10, the stuck deposit X damages the peripheral edge 6a of the disk 6 and induces scattering of the molten metal 7a. In this embodiment, as described above, the outer periphery of the scraper 10 Since the deposit X is unlikely to stick into the surface 10c, scattering of the molten metal 7a can be suppressed. Further, along with this, it is possible to improve the moldable time and the yield.
[0062]
Moreover, the fiber molded body formed by solidifying organic fibers such as natural fibers and synthetic fibers is harder than the cotton fabric laminate. Therefore, the scraper 10 can remove the deposit X adhering to the peripheral edge 6a of the disk 6 better than the conventional scraper 10 made of a cotton fabric laminate. In addition, since the scraper 10 is made of organic fibers, the disc 6 is not damaged like the conventional scraper 10 made of metal.
[0063]
As described above, according to the thin metal wire manufacturing apparatus of this embodiment, the central axis L1 of the scraper 10 is set to the rotating shaft 27 of the disc 6 so that the side surfaces 10a and 10b of the scraper 10 face the peripheral edge 6a of the disc 6. On the other hand, since it arrange | positions with the positional relationship of a twist, the damage to the peripheral edge 6a of the disc 6 by the scraper 10 can be suppressed, and the scattering of the molten metal 7a can be suppressed.
[0064]
Furthermore, according to the thin metal wire manufacturing apparatus of the present embodiment, the scraper 10 is configured such that the corner portion 10d between the side surface 10b and the outer peripheral surface 10c rearward in the direction of rotation of the disc 6 is the tip portion 6b of the peripheral edge 6a of the disc 6. Therefore, it is possible to further suppress the damage to the peripheral edge 6a of the disc 6 of the scraper 10 caused by the removed deposit X entering the contact portion.
[0065]
Further, in the case of the present embodiment having one scraper 10, it is preferable that the scraper 10 is disposed so as to contact the front end portion 6b of the peripheral edge 6a. The deposit X adhering to the tip 6b of 6a can be satisfactorily removed.
[0066]
Moreover, the scraper feed mechanism 40 which moves the scraper 10 in the direction which approaches the center side of the disc 6 so that the scraper 10 and the disc 6 may contact is provided in the metal fine wire manufacturing apparatus of this embodiment. That is, even if the scraper 10 is worn due to contact between the disc 6 and the scraper 10, the scraper 10 is moved toward the center of the disc 6 so that the scraper 10 and the disc 6 are in contact with each other by the scraper feed mechanism 40. Therefore, good contact between the scraper 10 and the disc 6 can be maintained for a long time. Therefore, the deposit X adhering to the peripheral edge 6a of the disk 6 can be removed well over a long period of time.
[0067]
Moreover, the scraper feed mechanism 40 is controlled by any one or more of the rotation time of the disk 6, the torque current applied to the rotation drive mechanism 25, and the load applied to the main body of the scraper 10. Without this, good contact between the scraper 10 and the disk 6 can be automatically maintained.
[0068]
Hereinafter, a second embodiment of the present invention will be described with reference to FIGS.
[0069]
The metal fine wire manufacturing apparatus of this embodiment is provided with a plurality of, for example, two scrapers. As shown in FIG. 3, these scrapers 11 and 12 are arranged at a predetermined interval in the circumferential direction of the disk 6 so as not to interfere with each other.
[0070]
As shown in FIG. 4, the first scraper 11 includes the tip 6b from one of the pair of inclined surfaces 6e and 6f included in the peripheral edge 6a of the disk 6, for example, the inclined surface 6f side. And the vicinity thereof. That is, the first scraper 11 is disposed so that the center portion thereof is located on the inclined surface 6f side from the surface including the tip portion 6b of the peripheral edge 6a of the disc 6, and the inclined surface 6f The tip 6b is in contact with the vicinity.
[0071]
Further, the rotation direction of the first scraper 11 at the contact portion where the first scraper 11 and the disk 6 come into contact is the direction approaching the tip 6b side of the peripheral edge 6a of the disk 6 from the inclined surface 6f side (FIG. 4). (Direction indicated by arrow E1).
[0072]
On the other hand, the second scraper 12 is in contact with the tip portion 6b and the vicinity thereof from any one of the pair of inclined surfaces 6e, 6f of the peripheral edge 6a of the disc 6, for example, the inclined surface 6e side. Are arranged as follows. That is, the second scraper 12 is disposed such that the center portion thereof is located on the inclined surface 6e side from the surface including the tip portion 6b of the peripheral edge 6a of the disc 6, and the inclined surface 6e. The tip 6b is in contact with the vicinity thereof.
[0073]
Further, the rotation direction of the second scraper 12 at the contact portion where the second scraper 12 and the disk 6 are in contact is the direction approaching the tip 6b side of the peripheral edge 6a of the disk 6 from the inclined surface 6e side (FIG. 4). (Direction indicated by arrow E2).
[0074]
Although omitted in FIG. 3, the rotation drive mechanism 30 is provided for each of the two scrapers 11 and 12. Further, the scraper feed mechanism 40 rotatably supports the scrapers 11 and 12 via the two connection members 42 and 42, and the direction in which the scrapers 11 and 12 are brought closer to and away from the disk 6 by one feed device 41. And is configured to be moved. Note that other configurations are the same as those in the first embodiment described above including the portions not shown, and therefore, duplicate descriptions are omitted by attaching the same reference numerals to the drawings.
[0075]
By the way, since the contact width between the peripheral edge 6a of the disc 6 and the molten metal is several hundred microns, it is preferable that the contact area between the scraper and the disc 6 is wide.
[0076]
As in the first embodiment, in the metal wire manufacturing apparatus in which the scraper 10 is disposed so as to be in contact with the front end portion 6b of the peripheral edge 6a of the disk 6 from directly above the disk 6, the scraper 10 causes the front end portion 6b of the peripheral edge 6a. Only the deposit X at the very tip is removed.
[0077]
On the other hand, in this embodiment, the adhering matter X adhering to the vicinity of the tip 6b of the inclined surface 6f of the peripheral edge 6a and the tip 6b is the side surface 11b behind the direction of rotation of the disk 6 of the first scraper 11. It is removed by piercing. Further, the adhering matter X adhering to and near the front end portion 6b of the inclined surface 6e of the peripheral edge 6a is removed so as to pierce the side surface 12b on the rear side in the traveling direction of the disc 6 of the second scraper 12. The That is, in the present embodiment, the adhering matter X attached to the vicinity of the tip portion 6b of the inclined surface 6f of the disc 6, the tip portion 6b, and the vicinity of the tip portion 6b of the inclined surface 6e can be removed.
[0078]
Further, in the present embodiment, the rotation direction at the contact portion of the scraper 11 with the disc 6 is the direction approaching the tip portion 6b side from the inclined surface 6f side, and the rotation at the contact portion of the scraper 12 with the disc 6 is performed. The direction is the direction approaching the tip 6b side from the inclined surface 6e side. Therefore, the deposit X adhering to the vicinity of the tip 6b of the inclined surface 6f of the disc 6, the tip 6b, and the vicinity of the tip 6b of the inclined surface 6e is scraped by the scrapers 11 and 12 toward the tip 6b of the disc 6. It is stripped off to be served. And it removes so that it may stab to the side surface 11b, 12b side of the rotation direction back of the disc 6 of the scrapers 11 and 12 back.
[0079]
As described above, according to the present embodiment, one scraper 11 is disposed so as to contact the tip 6b of the peripheral edge 6a and the vicinity thereof from the inclined surface 6f side, and the other scraper 12 is connected to the peripheral edge 6a from the inclined surface 6e side. Since the tip X is disposed so as to be in contact with the tip 6b and the vicinity thereof, the adhering matter X adhering to the vicinity of the tip 6b of the inclined surface 6f of the peripheral edge 6a, the tip 6b, and the tip 6b of the inclined surface 6f is attached. Can be removed.
[0080]
In addition, according to the present embodiment, the rotation direction at the contact portion of one scraper 11 with the disk 6 is set to the direction approaching the tip portion 6b side from the inclined surface 6f side, and the disk 6 of the other scraper 12 is disposed. Since the rotation direction at the contact portion is a direction approaching the tip portion 6b side from the inclined surface 6e side, the adhering matter X adhering to the peripheral edge 6a of the disc 6 is removed by the scrapers 11 and 12 on the disc 6 tip portion 6b side. It can be peeled off to be scraped off. Therefore, the deposit X adhering to the peripheral edge 6a of the disk 6 can be removed more satisfactorily.
[0081]
In this embodiment, two scrapers are arranged, but three or more scrapers may be arranged. In that case, as long as at least two scrapers are arranged as described above, the remaining scrapers may be arranged anywhere.
[0082]
Hereinafter, a third embodiment of the present invention will be described with reference to FIG.
[0083]
In the metal fine wire manufacturing apparatus according to the present embodiment, the scraper 11 includes a line segment L12 that forms a part of a tangent of the disk 6 that extends backward from the contact portion between the scraper 11 and the disk 6 in the direction of rotation of the disk 6. In this case, the angle (hereinafter referred to as the contact angle) θ1 formed by the line segment L12 and the central axis L11 of the scraper 11 is set to an angle of 10 ° to 45 °, for example, 30 °.
[0084]
When the scraper 12 is a line segment L22 that forms a part of the tangent of the disk 6 extending backward from the contact portion between the scraper 12 and the disk 6 in the direction of rotation of the disk 6, the line segment L22 An angle (hereinafter referred to as a contact angle) θ2 formed with the central axis L21 of the scraper 12 is arranged to be an angle of 10 ° to 45 °, for example, 30 °.
[0085]
Note that the position and area of the contact portion, which is a portion where the scrapers 11 and 12 and the disk 6 are in contact with each other, vary within a certain range due to bending or wear of the scrapers 11 and 12. Therefore, in the present embodiment, line segments L21 and L22 forming part of the tangent of the disk 6 extending from the respective contact portions of the scrapers 11 and 12 and the disk 6 to the rear in the traveling direction of the rotation of the disk 6, For example, it is defined as a line segment that forms a part of the tangent of the disk 6 that extends backward from the center of the contact portion between the disk 6 and the scraper 10 in the initial state in the direction of rotation of the disk 6.
[0086]
In this embodiment, as described above, the scrapers 11 and 12 have an inclination angle. Therefore, the scraper feed mechanism 40 includes not only a linear movement mechanism that linearly moves the scrapers 11 and 12 toward the disc 6, but also rotation or rotation in a direction that increases the respective contact angles θ1 and θ2. It is preferable to provide a rotation or rotation mechanism that can be applied to the scrapers 11 and 12.
[0087]
This is because, when the scraper feed mechanism 40 is provided with only a linear movement mechanism that linearly moves the scrapers 11 and 12 toward the disc 6, when wear of the scrapers 11 and 12 progresses, the center of the scrapers 11 and 12 is increased. This is because the cross-sectional shape that crosses the side surfaces 11a (11b) and 12a (12b) perpendicularly passes through a trapezoidal shape. When the trapezoidal cross section is formed in this way, only the same operation and effect as when the contact angle between the scrapers 11 and 12 and the disc 6 is 0 ° can be obtained, and the operation and effect by providing the scrapers 11 and 12 with a contact angle. The effect (this action and effect will be described later) cannot be obtained.
[0088]
Other conditions regarding the arrangement of the first and second scrapers 11 and 12 are the same as those in the third embodiment. Note that other configurations are the same as those in the first embodiment described above including the portions not shown, and therefore, duplicate descriptions are omitted by attaching the same reference numerals to the drawings.
[0089]
Table 1 is a table showing measurement results of molding time and yield when the rotational speed of the disk and the contact angle between the scraper and the disk are variously changed. In this measurement, the molding time is about 9 hours, and the diameter of the disc is about 200 mmφ. Further, the reason (1) for stopping is that the removed metal deposits between the outer peripheral surface of the scraper and the disk cause scratches on the disk and the molten metal is scattered.
[0090]
[Table 1]

[0091]
As shown in Table 1, when the contact angle is 10 ° or more, even if the disc has a diameter of about 200 mmφ and the rotational speed is 3000 rpm to 7000 rpm, it can be molded for 9 hours or more. Moreover, the yield is as good as 80% to 94. In contrast, when the contact angle is 0 ° or 5 °, the molding time is short (3.1 to 7.6 hours), and the yield is as low as 60% to 74%.
[0092]
Next, the relationship between the contact angle and the molding time when the rotational speed of the disc was 5000 rpm was measured in more detail (see FIG. 6). In FIG. 6, the square points are the ones where the molten metal scatters and the apparatus is stopped due to scratches on the disk due to removed deposits deposited between the outer peripheral surface of the scraper and the disk. The triangular points indicate that the apparatus for convenience of measurement was stopped, but in reality, the molding was still possible.
[0093]
From this, it can be seen that when the contact angle is 10 ° or more and 45 ° or less, the molding time is remarkably improved as compared with the case where the contact angle is less than 10 ° or more than 45 °.
[0094]
Table 2 is a table showing measurement results of molding time and yield when the contact angle is 30 ° and the rotational speed of the disc is 3000 rpm to 7000 rpm. For convenience of measurement, the apparatus was stopped at a molding time of about 9 hours. Actually, however, the molding was possible even if the molding time exceeded.
[0095]
[Table 2]

[0096]
In the measurement result shown in FIG. 6, the rotational speed of the disk is set to 5000 rpm. However, as shown in Table 2, even if the rotational speed of the disk is changed between 3000 rpm and 7000 rpm, the disk and the scraper It was found that there was a similar tendency in the molding time and yield measurement results depending on the contact angle.
[0097]
If the contact angles θ1 and θ2 are not less than 10 ° and not more than 45 °, the corner portions 11d between the side surfaces 11b, 12b and the outer peripheral surfaces 11c, 12c in the direction of rotation of the disc 6 of the scrapers 11, 12 are provided. This is considered to be because the deposit X adhering to the peripheral edge 6a of the disk 6 can be scraped off by 12d. Moreover, in this embodiment, since the contact angles θ1 and θ2 between the scrapers 11 and 12 and the disc 6 are as sharp as 10 ° or more and 45 ° or less, the deposits removed between the scrapers 11 and 12 and the disc 6 are removed. X is hard to get caught. Accordingly, it is considered that the attached matter X removed from the outer peripheral surfaces 11c and 12c of the scrapers 11 and 12 is hard to be pierced, so that it is possible to suppress damage to the disc 6 by the removed attached matter X.
[0098]
As described above, according to the metal fine wire manufacturing apparatus of the present embodiment, it is possible to improve the moldable time and the yield as compared with the case where the contact angle is 0 °.
[0099]
In addition, since the scrapers 11 and 12 are not perfect circles, there is a portion where the contact between the scrapers 11 and 12 and the disc 6 is weak, and the deposit X which is attached to the disc 6 is extremely rare in the portion where the contact is weak. It may not be removed. Even in such a case, according to the manufacturing apparatus of the present embodiment, since the scrapers 11 and 12 are arranged with a contact angle, the deposit X on the disk 6 can be removed well.
[0100]
That is, for example, the deposit X on the disc 6 that could not be removed by the scraper 12 because there is a gap between the scraper 12 and the disc 6 is disposed with a contact angle. And the disc 6 without passing between them. The deposit X rotates together with the disc 6 and can be removed when the scraper 11 and the disc 6 come into contact with each other or when the scraper 12 and the disc 6 come into contact again.
[0101]
The thin wire manufacturing apparatus of the present invention is not limited to the above-described embodiment. In the thin wire manufacturing apparatus of the present invention, the number of scrapers is arbitrary. Further, the position of the scraper may be anywhere as long as it does not interfere with each other or with other parts. Furthermore, an angle and an inclination angle between the center axis of the scraper and the rotation axis of the disk in a state where the scraper is viewed from above are also arbitrary.
[0102]
Furthermore, in the first to fourth embodiments, the scraper is disc-shaped, but the scraper does not necessarily have to be disc-shaped and may have an arcuate outer peripheral surface. That is, the scraper may have a fan shape (a part of a circle having a central angle of 0 ° to 360 °).
[0103]
【The invention's effect】
As mentioned above, according to this invention, the metal fine wire manufacturing apparatus which can suppress scattering of a molten metal is obtained.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a fine metal wire manufacturing apparatus according to a first embodiment of the present invention.
FIG. 2 is a partial cross-sectional view of the metal fine wire manufacturing apparatus along the line II-II in FIG.
FIG. 3 is a side view showing the vicinity of a disc and a scraper of a metal fine wire manufacturing apparatus according to a second embodiment of the present invention.
4 is a side view of the vicinity of a disk and a scraper of the metal fine wire manufacturing apparatus in FIG. 3 as viewed from the direction of arrow D in FIG.
FIG. 5 is a side view showing the vicinity of a disc and a scraper of a metal fine wire manufacturing apparatus according to a third embodiment of the present invention.
FIG. 6 is a diagram showing the relationship between the contact angle of the scraper and the molding time.
[Explanation of symbols]
6 ... disc, 6a ... peripheral edge, 6b ... tip, 6e, 6f ... inclined surface, 7 ... metal material, 7a ... molten metal, 10, 11, 12 ... scraper, 27 ... rotating shaft, 40 ... scraper feed mechanism, L1, L11, L12... Central axis, L21, L22.

Claims (6)

It has a peripheral edge (6a) that is rotationally driven in a fixed direction by a rotational drive mechanism and is brought into contact with the molten metal, and this peripheral edge (6a) is brought into contact with the molten metal to rapidly cool a part of the molten metal. And a disc (6) that is blown in the tangential direction of the peripheral edge (6a) to form a fine metal wire,
The disc (6) is provided so as to come into contact with the peripheral edge (6a), and is composed of a fiber molded body obtained by solidifying and molding organic fibers, and the molten metal adheres to the disc (6). One or more scrapers (10, 11, 12) to be removed from the disk (6),
The scraper (10, 11, 12) is provided rotatably around its central axis (L1, L11, L21), and has a circular or arcuate outer peripheral surface (10c, 11c, 12c) and the disc ( one side (10a to rim (6a) positioned in the rotation direction front side of the circular plate (6) of the 6), 11a, and 12a), the circular plate with respect to the peripheral edge (6a) of said disc (6) other side located in the rotational direction rear side of (6) (10b, 11b, 12b) and has the outer peripheral surface (10c, 11c, 12c) and said other side (10b, 11b, 12b) is the faces the periphery (6a) and said outer peripheral surface of the disc (6) (10c, 11c, 12c) and said other side (10b, 11b, 12b) corners and intersect (10d, 11d, 12d) is the circular the central axis of the plate peripheral edge (6) said scraper in contact with (6a) (10,11,12) (L1 , L11, L21) the disc rotation axis (6) skewed relative to (27) Metal fine wire manufacturing apparatus characterized by being arranged in relation. The said scraper (10) is arrange | positioned so that the said corner part (10d) may contact | connect the front-end | tip part (6b) of the periphery (6a) of the said disk (6), The said scraper (10) is arrange | positioned. Metal wire manufacturing equipment.   One scraper (10) is provided, and the peripheral edge (6a) of the disk (6) has a pair of inclined surfaces (6e, 6f) along the circumferential direction and is tapered outward in the circumferential direction. The thin metal wire according to claim 1 or 2, wherein the scraper (10) is arranged so as to be in contact with the tip (6b) of the peripheral edge (6a). Manufacturing equipment.   A plurality of the scrapers (11, 12) are provided, and the peripheral edge (6a) of the disk (6) has a pair of inclined surfaces (6e, 6f) along the circumferential direction and tapers outward in the circumferential direction. And at least two scrapers (11, 12) of the plurality of scrapers (11, 12) are one of the pair of inclined surfaces (6e, 6f). The other inclined surface (6f) of the pair of inclined surfaces (6e, 6f) is arranged so as to be in contact with the tip (6b) of the peripheral edge (6a) and the vicinity thereof from the inclined surface (6e) side of 3. The apparatus for producing a fine metal wire according to claim 1, wherein the metal wire manufacturing apparatus is disposed so as to be in contact with the tip end portion (6 b) of the peripheral edge (6 a) and the vicinity thereof from the side of the). The scraper (11, 12), the line segment the central axis (L11, L21) is extending in the tangential direction of the disc at the contact portion (6) of the scraper (11, 12) and the disc (6) 4. The apparatus for producing a fine metal wire according to claim 1, wherein the apparatus is disposed so as to be inclined at an angle of not less than 10 degrees and not more than 45 degrees with respect to (L12, L22).   A scraper feed mechanism for moving the scraper (10, 11, 12) toward the center side of the disc (6) so that the scraper (10, 11, 12) and the disc (6) are in contact with each other ( 40) is provided, The metal wiring manufacturing apparatus of any one of Claims 1-4 characterized by the above-mentioned.

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