TW539776B - Method of producing metal ferrules, and device therefor - Google Patents

Abstract

A method of producing metal ferrules and a device therefor, wherein metal ferrules are produced with high productivity and high dimensional accuracy by arranging a plurality of long-sized core wires. A metal ferrule producing method and device, characterized in that a jig for receiving a metal to be electrocast is placed in an electrocasting tank, a holding unit in which a plurality of core wire holders for holding core wires are held in circumferential array is installed in the electrocasting tank, and the core wire holders and the holding unit are rotatable on their respective axes. It is preferable that the resistivity of the core wires be 5x10<-6> Omegacm or less. A core wire plated within a thin layer of metal having a resistivity of 5x10<-6> Omegacm or less may be used. Further, it is advisable to provide a conductive electric discharge body on the front end of the core wire. The resistivity of the conductor is preferably 10x10<-6> Omegacm or less, and the surface area of the conductive electric discharge body is preferably 10-100 times the outer surface area of the core wire. Further, the jig for receiving the metal to be electrocast is preferably such that a metal plate of given width extending longitudinally of the jig substantially throughout the length of the jig is formed to face in the direction of the core wire in such a manner as to project perpendicularly from the lateral surface of the jig. Further, the core wire holder is preferably provided with an elastic mechanisms, such as a spring or rubber for tightening the core wire, or with a wide prop projecting outwardly of the holder.

Description

539776 A7 B7 V. Description of the Invention (1) [Technical Field] The present invention relates to a method for forming a metal film on the surface of a core wire by electroforming, and a method for manufacturing a metal ferrule by drawing the core wire from the formed metal film and a device for manufacturing the metal ferrule. . [Technical Background] The ferrule is used as a part of a component of a connector for connecting a silica-based optical fiber. The optical connector is fixed by a ferrule. The thickness of the optical fiber is about 125 mm, which can correctly match the position of the core of the optical fiber. The ferrule used today is made of stainless steel, 塑胶 or plastic, but the mainstream is pin. When manufacturing a ferrule made of chrome, first, chrome powder is mixed with a resin, and the injection molding, extrusion molding, etc. are formed into a cylindrical shape, and the molding is heated at a temperature of about 500 t to decompose and remove the resin component, and It is fired at a high temperature of about 120 ° C. After firing, it is cut to a predetermined length, and honing is performed on a hole in the center of the cylinder through a linear diamond honing body, and the inner diameter is polished with a precision. This honing operation is performed by hand and requires accuracy. In addition, mid-drilling honing is performed, and the honing end face is subjected to ferrule processing. In addition, in order to improve the coaxial accuracy of the inner and outer diameters, a centerless wire drawing process is performed. As described above, even if the above-mentioned processes are performed, the inner diameter, the outer diameter, and the coaxiality are not uniform. Therefore, it is actually necessary to check one by one to distinguish the size and classification. The manufacturing of pin ferrules must require expensive injection molding machines, extrusion molding machines, and molds, and the life of the molding machines and molds is short, and the paper size applies to China National Standard (CNS) A4 specifications (210X297 mm) — 1 --------- (pain first read, the notes on the back before filling this page) Order

Printed by the Employees' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs -4- 776 776 A7 B7 Printed by the Consumers' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (2) 1 2 0 '〇 It has high energy cost for processing zirconium resin molding In addition, in order to obtain the dimensional accuracy of the central hole, the hole must be honed with a linear diamond honing body. Honing is a problem due to the operator's highly skilled manual operation and low productivity. The invention obtains a metal ferrule by electroforming instead of the manufacturing of a ferrule made of zirconium. It has long been known to make small-pore tubes by electroforming. For example, Japanese Patent Laid-Open Nos. 11 to 19 3485 describe a method for controlling the formation of a metal film on the surface of a core material and leaving the formed metal film with pores removed from the core material. Also, Japanese Patent Application Laid-Open No. Sho 5 6-9 0 9 9 5 and Japanese Patent Application Laid-Open No. 4 1 3 1 5 8 · 9 describe electroformed metal on the outer surface of a core wire that can dissolve chemicals, and cut a predetermined size. Then, a method of manufacturing a small-diameter tube by melting and removing the core wire with a drug is performed. That is, after the core wire is prepared by electroporation, the metal is electrophoresed around the core wire by an electroforming operation, and then the core wire is removed by an appropriate method to produce a method having a small diameter tube. Basically, by this method, a ferrule for optical fiber connection can be manufactured. The outer diameter of the fiber optic cable is set to 0 · 125 mm according to the specifications. Therefore, the inner diameter of the ferrule is about 0.126 mm. The length of the ferrule itself is less than 12 mm, and the outer diameter is about 2.5 mm. As described above, when a small-sized and small-diameter pipe is manufactured by electroforming, there are various problems, especially productivity and dimensional accuracy. In order to improve productivity, a method in which electroforming is performed using a long core wire at the same time and then cut to a predetermined length is preferable. When using long core wires and applying multiple core wires at the same time, there will be a large uniformity problem. The ferrule must have a garment (please read the precautions on the back before filling this page).

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This paper size applies the Chinese National Standard (CNS) A4 specification (210X 297 mm) 539776 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (3) High circularity and coaxiality Every root, the thickness of the electroformed layer in the length direction must be uniform, and the thickness of the electrophoretic layer of the plurality of core wires must also be uniform. The problem of uniformity is how to make the circularity of the ferrule, that is, the inner and outer diameters of the ferrule are uniform and coaxial, even if the inner diameter and the center of the outer diameter axis coincide. For example, using a stainless steel round wire with a diameter of 0, 125 mm as the core wire, and using this as the cathode to connect the power source for electroforming, as shown in Figure 3 (b), the diameter above the upper diameter can be obtained. Small electroformed body with uneven electrophoresis. This is because the current density of the stainless steel core wire near the power source is large, but the part that is farther away from the power source has a smaller current density due to the resistance of the core wire. The amount of electrophoresis of metal is proportional to the current density. Therefore, the closer the power density of the power source is, the greater the amount of electrophoresis is. The larger, the farther away from the power supply part, the smaller the diameter. The phenomenon that the diameter of the electroformed body is large at one end, and the diameter of the electroformed body is smaller as it is closer to the other end, produces a large problem when the size of the ferrule for optical fiber is small. In particular, as a means for improving the productivity of the ferrule, there is a problem when a method of cutting a predetermined length is used in manufacturing a long-sized tube. * Also, when a metal ball is used as the anode, the metal ball is placed in a conductive net-shaped cylinder or the like. When the core wire is electroformed, the shape of the electroformed body is strongly related to the shape of the tube in which the metal ball is placed. For example, when the shape of the cylinder expands toward the outside, the electroformed body forms a large outer portion corresponding to its position (please read the precautions on the back before filling this page).

This paper size applies to China National Standard (CNS) 8-4 (210X297 mm) -6- 539776 printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (4) When the shape of the tube is sunken toward the inside , Forming a relatively small outer diameter of the electroformed body. That is, as shown in FIG. 13 (a), a nickel metal block 64 is housed in a metal cylinder 6 1 made of titanium. The metal cylinder 61 is tapered from the center to the inside. When the metal cylinder 61 is used for electroforming, the obtained electroformed body has a problem that it becomes thinner as shown in FIG. 13 (b), which corresponds to the portion that sinks toward the inside of the metal cylinder. In addition, the cause of the uneven size of the electroformed body is a problem related to the degree of extension of the core wire. That is, when the tension acting on the core wire is large, the core wire is stretched to cause a difference in the core wire diameter in the length direction, and the obtained outer diameter of the electroformed body is also different, and a ferrule with high dimensional accuracy cannot be obtained . In addition, when the tension is small, the core wire is loosened, and the uniformity of the obtained electroformed body is also impaired. The present invention provides a small ferrule with an inner diameter of about 0.126 mm, which can efficiently and productively produce a uniform inner diameter and outer diameter with a small inner diameter and high coaxiality, especially when the small ferrule is manufactured by electroforming. Method and device for ferrule. [Disclosure of Invention] The present invention provides a method for manufacturing a metal ferrule and a device for manufacturing a metal ferrule. In the manufacturing method of the present invention, a metal film is formed on the outer surface of the core wire by electroforming, and a method of manufacturing a metal ferrule by drawing the core wire from the formed film is characterized in that a plurality of peripheral wires are provided for use in electroforming. It is a manufacturing method of an electroformed metal ferrule equipped with a metal clamping tool to rotate the core wire bracket and rotate the holder at the same time. In addition, the resistance of the core wire used in electroforming is based on the Chinese National Standard (CNS) A4 specification (210X297 mm) — (Please read the precautions on the back before filling this page).

539776 A7 B7 printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. The invention description (5) The best rate is below 5 X 10- 6Ω cm, or it can be electroformed on stainless steel and phosphor bronze core wires. Resistivity 5 The first thin metal layer of X 1 0 to 6 Ω cm or less is electroformed with a second metal having a predetermined diameter. The first metal includes gold, silver, copper, inscriptions, and any alloy mainly composed of these metals, and the second metal is nickel or an alloy mainly composed of nickel. A conductive discharge body can be maintained on the distal side of the power supply of the core wire. In addition, the resistivity of the discharge body is preferably 10 X 1 0 to 6 Ω cm or less, and the surface area of the conductive discharge body is preferably 10 to 100 times the outer surface area of the core wire. In addition, when manufacturing metal ferrules by electroforming, stainless steel or phosphor bronze is used, and electroforming metal can use nickel or nickel-based alloys. A clamping tool for accommodating electroformed metal may be a metal plate having a certain width in the longitudinal direction of the clamping tool, which is approximately the entire length of the clamping tool in the longitudinal direction of the clamping tool, and vertically protrudes from the side of the clamping tool. The metal clamp is preferably a titanium mesh cylinder. It can be equipped with elastic mechanism such as spring or rubber for tightening the core wire on the core wire holder. The elastic mechanism conveys the tension of the core wire so that the elastic limit of the core wire is preferably below. In addition, the core wire support may be provided with a wide pillar extending toward the outside of the support. In addition, the pillars are preferably arranged in a radial shape, and the shape is rectangular, and the pillars are preferably 2 to 4. The device for manufacturing a metal ferrule according to the present invention is characterized in that: inside the electroforming groove, a holder for holding a plurality of core wire brackets for holding the core wire in a circular shape is arranged, and a plurality of peripheral parts are used for electroforming. The paper size with metal is applicable to Chinese National Standard (CNS) A4 (210X297 mm) (Please read the precautions on the back before filling this page)

Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 539776 A7 ______ B7 __ V. Description of the invention (6) Clamping device enables the core wire bracket to rotate on one side and the holder to rotate at the same time. In this device, the clamping tool placed in the electroformed metal can be arranged in the core wire support in a circular shape; the electroforming solution is equipped with an ultrasonic generating device for stirring the electroforming solution; and the conductive discharge body is maintained from the core power source. Distal side. The resistivity of the conductive discharge body is preferably 10 × 10 to 6 Ω cm or less, and the surface area of the conductive discharge body is preferably 10 to 100 times the outer surface area of the core wire. In addition, the core wire has a resistivity of 5 X 1 0 to 6 Ω cm, and a thin-layer coating film of a metal having a resistivity of 5 X 1 0 to 6 Ω cm or less is preferred. A clamping tool for accommodating electroformed metal may be a metal plate having a certain width in the longitudinal direction of the clamping tool, which is approximately the entire length of the clamping tool in the longitudinal direction of the clamping tool, and vertically protrudes from the side of the clamping tool. The metal clamp is preferably a titanium mesh cylinder. It can be equipped with elastic mechanism such as spring or rubber for tightening the core wire on the core wire holder. The elastic mechanism conveys the tension of the core wire so that the elastic limit of the core wire is preferably below. In addition, the core wire support may be provided with a wide pillar extending toward the outside of the support. In addition, the pillars are preferably arranged in a radial shape, and the shape is rectangular, and the pillars are preferably 2 to 4. [Brief description of the drawings] FIG. 1 is a diagram showing an example of a ferrule, FIG. 2 is a diagram showing an example of an electroforming apparatus of the present invention, FIG. 3 is a diagram showing a processing state of an electroformed body, and FIG. An example diagram of the core wire bracket of the present invention, and FIG. 5 is an example diagram showing the arrangement state of the core wire bracket, holder, and metal clamping tools of the present invention. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297). Li) (Qin Xian read the notes on the back and fill in the purchase)

539776 A7 _B7 V. Description of the invention (7) (Please read the precautions on the back and then fill out this page). Figure 6 shows an example of the core wire of the discharge body of the present invention. Figure 7 shows the discharge of the invention. FIG. 8 is a diagram showing an example of a core wire support provided with a wide support of the present invention, FIG. 9 is a diagram showing an example of a core wire support provided with the elastic mechanism of the present invention, and FIG. Another example of the core wire holder of the elastic mechanism of the present invention is shown in FIG. 11 and FIG. 11 are diagrams showing a metal clamping device provided with the metal plate of the present invention, and FIG. Fig. 13 is a diagram showing an example of a metal clamp and an electroformed body obtained. '' Comparison table of main components · · 10 Electroforming equipment 11 Power supply 12 Motor 13 Shaft 15 Anode 16 Core wire 17 Coupling Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economy 18 Electroforming liquid 2 0 Keep the upper frame 2 1 Keep the lower frame 2 2 Extension section 26 Ultrasonic generating device 2 8 Holder 3 1 Pillar This paper size is applicable to Chinese National Standard (CNS) A4 (210X297 mm) -10-539776 A7 B7 ^ ------------ ----- V. Description of the invention (8) 2, 3 3 Fixing parts 3 4 Rotating shaft 3 5, 3 6 Upper frame 3 7, 3 8 Groove 3 9 Lower frame 4 1 Upper frame 4 2 Horizontal frame 4 3 Lower frame · 44-45 Fasteners 5 1 Clip · Tightening tool · 5 2 Elastic mechanism 5 3 Bottom frame 5 7 Cylinder part 5 8 Core wire holding part 59 Spring holding part 6 0 Spring 6 3 Bottom frame (the best form for implementing the invention ) When manufacturing a ferrule, it is a very small object with a maximum length of about 12 mm and an outer diameter of up to 2.5 mm. Therefore, the point of how to improve productivity is actually a great problem. Therefore, a method is proposed in which electroforming is performed simultaneously on a relatively long plural core wires and then a predetermined length is cut. Where long core wires are used and multiple core wires are electroformed at the same time, this paper size applies the Chinese National Standard (CNS) A4 specification (210 × 297 mm) (#Read first • Notes on the back before filling this page), ιτ

Produced by the Intellectual Property Bureau of the Ministry of Economic Affairs, printed by employees -11-539776 A7 B7 V. Description of Invention (9) In particular, there will be problems such as large uniformity. The ferrule is to obtain high circularity and concentricity. Therefore, for each core wire, it is necessary to obtain a uniform electrophoretic layer thickness in the longitudinal direction, and at the same time to obtain a uniform electrophoretic layer thickness of a plurality of core wires. For long-size electroformed products with high coaxiality and uniformity, it is important to make the ion concentration in the core wire and the anode around the electroformed bath uniform. Although stirring is performed during the electroforming operation, the main point of the stirring is the uniform ion concentration around the electrode. The metal ions in the electroforming bath are transported to the periphery of the cathode by convection, etc., and move to the surface of the cathode by diffusion caused by the difference between the concentration of metal ions on the surface of the cathode and the concentration of metal ions in the electroforming bath. The metal ions moving to the surface of the cathode are metal crystals that are incorporated on the surface of the cathode and lose their charge. An electrical double layer is formed around the cathode, which produces a collusion in the metal ion concentration. The difference in the concentration of the metal ions should be reduced as much as possible along the length of the core wire, and the thickness of the diffusion layer should be reduced. A uniform metal must be electrophoresed along the length of the core wire. In order to reduce the difference in the concentration of metal ions, the present invention rotates the holders holding the plurality of core wire holders while rotating the core wires forming the cathode with each holder. The diameter of the core wire is very small, about 0.126 mm. The core wire is set on the core wire holder and immersed in the electroforming bath. Therefore, when electroforming is performed on a plurality of core wires at the same time, the core wires are set on the core wire holder holder by each bracket. The core wire rotates the holders of the core wire while the brackets rotate, thereby obtaining a uniform ion concentration around the core wire. The number of rotations of the core wire support is preferably 30 to 100 times / minute. Alternatively, the paper size of the core wire holder is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) ---------- Read the precautions on the t-face before filling in this page

Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs -12- 539776 A7 _B7__ V. Description of Invention (10) The number of revolutions is preferably 20 to 80 times / minute. Read-Read the notes of r &amp; first, and then fill out this page. First, as mentioned above, because the so-called diffusion layer of electrical double layer is generated around the cathode, how to obtain this small diffusion layer is one of the focus of stirring. In particular, ultrasonic waves can achieve the effect of reducing the diffusion layer. The wavelength of the ultrasonic wave used is preferably from 15 kHz to 60 kHz, and its energy source is preferably from 2 to 4 W / cm 2. When an ultrasonic wave having characteristics in any of these ranges is used, a large stirring effect can be obtained. When the wavelength of the ultrasonic wave is less than 15 kHz, the effect of using the ultrasonic wave is small, and conversely, the effect is reduced when it is larger than 60 pm, so the frequency can be set within this range. In addition, even if the use of energy is not effective, and if the energy is too large, wrinkles may occur in the electroformed product. Therefore, the above is an appropriate energy range. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, as shown in Figure 2. The electroforming apparatus 10 includes an anode and a cathode. The anode 15 is a metal plate for electrophoresis, and a metal plate, a metal ball, or the like can be used. When a metal ball is used, it can be used with a conductive metal ball in a bag or the like. The anode can be provided in multiples as required. The anode is connected to a power source 11 such as the anode of a battery. The cathode is an electroformed core wire 16 connected to a power source 11, such as the cathode of a battery. The core wire 1 6 is supported on the core wire bracket 2 1. In a state where the core wire 16 is supported by the core wire holder 21, the core wire 16 is held in the holder 28 and immersed in the electroforming solution 18, and is electroformed. The core wire 21 can be represented by, for example, Fig. 4 (a) and (b). In Fig. 4 (a), three wave pillars 31 are arranged between the upper frames 3 5, 3 6 and the lower frames 3 9 to maintain the overall shape. A part of the upper frame 36 and the lower frame 3 9 are respectively provided with grooves 3 7 and 3 8, and the core wire 16 is fixed on the core wire support 21 using fixing members 3 2 and 3 3. In addition, the motor can be set according to the Chinese standard (CNS) A4 size (210X297 mm) 13 539776 A7 _B7_ V. Description of the invention (11) 1 2 The rotating shaft 3 of the core wire bracket 2 1 is transmitted. In Figure 4 (b) (please read the precautions on the back before filling out this page), the core wire bracket is composed of upper frame 4 1, lower frame 4 3 and horizontal frame 4 2, and the core wire 16 is a fixing member 4 4 , 4 5 are fixed on the upper frame 41 and the lower frame 4 3. The core wire support is not limited to such shapes, and of course, various types can be appropriately used. The plurality of core wire holders 21 are held on the holder in a circular shape, for example. In the second figure, the holder 2 8 is composed of holding the upper frame 20, holding the lower frame 2 5, the rotating shaft 13 and its extension 22, and the core wire support 2 1 supports and holds the holding upper frame 20 and holds. The lower box is between 2 and 5. The holding frame 20 group is provided with a device for rotating the core wire support 21. It does not necessarily need the shaft extension 22, but it is for the purpose of providing a stable holder 28 to rotate. The front end of the shaft extension is provided with a bearing 2 3 provided at the bottom of the electroforming bath, which helps to stabilize the holder 28. A plurality of core wires are provided on the holders 2 8 by a plurality of brackets 21. It is better to install as many wires as possible. For example, 100 core wires can be installed in a circle in a circle on each support frame around the holder 28. The holder 28 is rotated on a shaft 13 by a motor 12 through a coupler 17. A device for individually rotating the core wire holder 21 is attached to a portion holding the upper frame 20. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. Figure 2 shows that the side of the electric search bath is provided with a plurality of ultra-clover wave generating devices 2 6. If necessary, the ultrasonic generator can be operated to obtain a uniform ion concentration in the electroforming bath. Fig. 5 is a perspective view showing a state in which the core wire 21, the holder 28, and the metal clamping tool 51 are placed in a row from above. Holders 2 8 are arranged in a circular shape between the upper holding frame 2 0 and the lower holding frame (not shown). This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) ~ One 539776 A? ______________ B7 V. Description of the invention (12) I # Please read the precautions on the back before filling in this page) 衩 Number of M core wire brackets 2 1. A plurality of clamps 5 1 placed in the metal are arranged in a ii⑸M shape to surround the holders 2 8. The rotation from the motor 12 is turned through the device (not shown) in the upper frame 20 to rotate the core wire support, and the holder 28 is rotated at M. As described above, when a long core wire is used; when a plurality of core wires are electroformed at one time, there is a problem of uniformity. For example, as shown in Fig. 3 (b), the non-uniform electroformed body will decrease in diameter from one end to the other end. As a result of various investigations by the inventors of the present invention on solving such problems as non-uniform diameters, the conductive discharge body was maintained at the other end of the core wire, thereby obtaining a sleeve having a uniform outer diameter even when using a long-sized core wire. ring. That is, a discharge body is provided at the other end of the core wire, and the resistivity or surface area of the discharge body is appropriately selected so that the current flowing through the core wire actually forms a current density flowing from the discharge body to form a certain length of the core wire. As a result, a uniform electrophoresis amount along the length of the core wire is formed, and a ferrule having a uniform outer diameter can be obtained. Fig. 6 shows a state in which the spherical discharge body 19 is attached to the front end of the core wire 16. The discharge body is preferably made of a material having a small resistivity. This is because the resistivity of the discharge discharge body which concentrates the current in the discharge body is 10 × 10 6 printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. In addition, the surface area of the discharge body plays an important role. Therefore, the surface area of the discharge body must be carefully determined. When a beta discharge body is provided with a core wire for electroforming, of course, electrophoresis also occurs in the discharge body. This || 彳: When the surface area of the discharge body is large, the current density of the discharge body will increase, which will increase the amount of metal in the discharge body by 5 and reduce the amount of metal electrophoretic on the important core line h. As a result,-·-.. _ Ί. ......... .....-The size of the wood paper is in accordance with the Chinese National Standard (CNS) A4 (210X29 * 7mm) 539776 A7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. Description of the invention (13) The time required for electroforming is extremely long. Conversely, when the surface area of the discharge body is small, the uniformity of the core current density is insufficient, and an uneven electrophoresis® is formed toward the length of the core wire, and an electroformed body with a uniform outer diameter cannot be obtained. Therefore, in order to obtain an electroformed body with a uniform outer diameter, it is important to set the surface area of the discharge body to the most appropriate. For the purpose of obtaining the most appropriate surface area of the discharge body, it is best to set the surface area of the core wire to 10 to About 100 times. The core wire is electroformed to increase the diameter of the metal. As the diameter of the core wire increases, the amount of metal electrophoresed on the core wire will gradually exceed that of the electrophoretic discharge body. That is, when the gold core wire is immersed in the electroforming solution to start electroforming, compared with electrophoresis in the discharge body, the metal is more than the core wire itself, but as the amount of metal in the electrophoresis core wire increases, the metal is preferentially electrophoresed on the core wire. The discharge body 19 can take various forms. For example, as shown in FIG. 6, a spherical shape may be used, or a plate shape as shown in FIG. 7 (a) may be used. Alternatively, as shown in FIG. 7 (b), a discharge body is provided below the support frame. In addition, the inventors focused on the effect of the core wire resistivity on the diameter nonuniformity, and used a smaller metal with a resistivity less than a predetermined value as the core wire, thereby obtaining a long core wire. Ferrules with uniform outer diameter. That is, by reducing the resistivity of the surface of the core wire, a uniform metal ferrule can be obtained. The specific resistance of the surface of the core wire is preferably 5 X 1 0-6 Ω cm. When the resistivity is larger than this range, it is difficult to obtain an electroformed product having a uniform outer diameter when electroforming is performed using a long core wire. Resistivity is 5 (please read the notes on the back before filling this page).

This paper size applies to China National Standard (CNS) A4 (210X297 mm) -16- Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 539776 A7 B7 V. Description of the invention (14) X 1 〇6 Ω cm The following substances can be exemplified Such as gold, silver, copper, Ming and alloys based on these. In addition, phosphor bronze has a low resistivity and a large tension, and can be effectively used. The resistivity of the core wire is preferably 5 X 1 0-6 Ω cm or less. Therefore, the core wire itself may have a resistivity of 5 X 1 0-6 Ω cm or less. A metal with a large resistivity may be, for example, stainless steel. A thin layer of metal with a small resistivity of about 10 vm is electroformed on the wire. At this time, the metal with the small specific resistivity of the first electroformed thin layer on the core wire is referred to as the first metal, and the metal with the low specific resistivity electroformed is referred to as the second metal. These core wires are used for electroforming to form a uniform electrophoresis amount along the length of the core wires, and a ferrule with a uniform outer diameter can be obtained. The thickness of the first metal layer having a low electroformed resistivity is sufficient as long as it can ensure a good electrical conductivity, and it can be suitably used in the range of several to several ten μm. Electroforming is applied thereon until the second metal is formed to a predetermined diameter. You can choose stainless steel and phosphor bronze as the matrix of the wire used by the master mold, and apply silver, gold, and copper electroforming on the core wire with a thickness of about 10 // m. In addition, the substrate can be made of gold, silver, aluminum, copper, or an alloy mainly composed of these materials. The surface of the core wire is preferably a smooth surface, but it is often formed with small unevenness. When a metal with a low resistivity is electroformed on the surface, the outer surface of the core wire has the advantage of being smooth. Also, since the stainless steel wire or phosphor bronze wire has a high tension, the core wire can be effectively drawn from the ferrule. In order to make the core wire holder have a stirring effect, it is better to provide a wide pillar in the core wire holder. When the wide support is rotated by the core wire support, it will be subjected to the resistance of the large electroforming solution to obtain excellent stirring effect. The shape of the pillar is basically as long as it can accept the resistance of the electroforming solution. Except for the rectangular shape of the general shape, this paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) (Please read the precautions on the r side before filling in (This page)

-17- Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 539776 A7 _B7_ V. Description of the invention (15) For example, circular or polygonal pillars, or those with jagged shapes, can also be provided with bumps and small holes on the pillars. And so on. In order to increase the stirring effect, it is better to form a pillar that extends toward the outside of the core wire support. When the core wire support is turned, the resistance of the extension part to receiving the electroforming solution is increased, and the stirring effect is increased. It is preferable that the pillars are arranged in a radial pattern. This is due to the rotation of the core wire bracket, and the pillars are arranged in a radial shape to have the best stirring effect. In addition, the pillar is preferably a rectangular plate. The rectangular plate shape is the simplest shape, but has excellent stirring effect. The core wire support of the present invention has the feature that the pillar has a stirring effect. As long as it is a pillar, there must be two or more pillars. The number of pillars is preferably 2-4. This is because it is difficult to expect a greater improvement in the stirring effect even if five or more are provided. Fig. 8 shows an example of a core wire holder. The pillars are replaced by rectangular plate-shaped pillars 5 4, 5 5 and 5 6. This pillar is arranged to extend partly toward the outside of the core wire bracket, or the pillar is arranged in a radial direction toward the core wire bracket, that is, radially arranged. With the configuration of the above-mentioned pillars, a large stirring effect can be obtained when the core wire support rotates. When supporting the core wire bracket, the pillar does not cause the whole pillar to extend outside the core wire bracket. About 20% to 80% of the area is preferably stretched to the outside. The pillar has a rectangular plate shape as shown in Fig. 8, but it is not limited to this. For example, the protrusions may be provided in a zigzag manner, or the plate may be provided with irregularities. Alternatively, use at least 2 pillars. From the viewpoint of stirring effect, it is generally preferable to use about three. Even if five are set, the effect will not increase sharply. In order to obtain an electroformed body of uniform thickness, the tension of the core wire is one of the key points. High longitudinal electroforming with excellent circularity, coaxiality, and manufacturing uniformity (talk about the precautions for t * face before filling out this page)

This paper size applies Chinese National Standard (CNS) A4 (210X297 mm) -18- 539776 A7 B7 V. Description of the invention (16) The core wire in the electroforming bath must be given proper tension to form a tensioned state. When giving a moderate tension to the core wire, a core wire holder with an elastic mechanism can be used. As the elastic mechanism, an elastic body such as a spring or rubber can be used. The magnitude of the tension applied to the core wire is preferably less than the elastic limit which does not cause permanent deflection. In particular, a tension of about 10 to 50% of the elastic limit is preferred. An example of providing an elastic mechanism in the core wire holder is shown in FIG. 9. An elastic mechanism 5 2 and a frame bottom frame 5 3 for holding the elastic mechanism are provided at the lower part of the support. One end of the elastic mechanism 52 is connected to the lower frame 30 of the bracket, and the other end of the elastic mechanism 52 is connected to the bottom frame 53 of the bracket. The lower frame of the bracket. 3 9 is moved up and down to control the tension applied to the core wire. Although the elastic mechanism 52 is formed of a spring in Fig. 9, it is not limited to a spring, and an elastic body known to other manufacturers such as rubber may be used. Since the spring can be selected to have a predetermined tension, it can be effectively used in electroforming. According to the core wire used, a spring with a considerable tension in the core wire is selected. The tension applied to the core wire is below the elastic limit of the core wire. Once the elastic limit is exceeded, the core wire will be permanently deflected and a uniform electroformed body cannot be obtained. In particular, it is preferable to give the core wire tension an elastic limit of 10 to 50%. Other examples of the elastic mechanism are shown in FIG. 10. The core wire 16 is fixed to the core wire holding portion 58. The bracket bottom frame 6 3 is connected to the cylindrical portion 5 7 by a spring holding portion 5 9. A spring 60 is wound around the cylindrical portion 57. One end of the spring 60 is coupled to the spring holding portion 59, and the other end is coupled to the core wire holding portion 58. The core wire holding portion 5 8 is provided so as to be able to move up and down along the cylindrical portion 5 7. The core wire holding portion 58 is pulled downward by the spring 60, and as a result, the core wire can be tightened. This paper size applies to China National Standard (CNS) A4 specification (210X297 mm) (Please read the precautions for the poor side before filling this page) Order

Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 539776 A7 B7 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Have a great impact. Therefore, in response to this problem, a porous metal cylinder is provided with a metal plate which is vertically arranged from the side of the cylinder in the longitudinal direction of the cylinder. This metal plate can be provided with a vertically protruding side surface of the porous metal tube in substantially the entire length of the tube in the longitudinal direction. In addition, it is preferable that the metal plate has a certain width. Especially in the longitudinal direction of the porous metal tube, a metal plate of a certain width protruding vertically from the side of the tube is formed over the entire length of the tube, so that the current can be concentrated on the metal plate and the metal plate can flow Forming a vertical direction allows the current to flow uniformly toward the length of the metal plate, and has a significant effect of uniformly forming the shape of the obtained electroformed body. As a result, even when the shape of the re-porous metal cylinder is deflected, an electroformed body having a uniform shape can be obtained. The metal plate provided in the porous metal tube is preferably oriented toward the core wire. An electric current was passed between the metal plate of the porous metal cylinder and the core wire, and electroforming was performed. Therefore, in order to obtain a uniform electroformed body, it is preferable that the current flow from the metal plate of the porous metal cylinder toward the core wire. The porous metal cylinder is preferably one that is not impregnated with an electroforming solution. From the viewpoint, a porous metal cylinder made of titanium is preferred. For example, a metal mesh cylinder shown in Fig. 11 can be used. The porous metal cylinder 61 is provided with a metal plate 62 having a certain width, which protrudes perpendicularly from the side of the cylinder. An electroformed metal block 6 4 is placed in the porous metal tube 6 1. The porous metal tube may be a metal mesh tube, but it is not limited to this. A plurality of holes may be provided in the tube formed by the metal plate. (Please read the notes on the back before filling this page)

This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) -20- 539776 A7 _____B7 V. Description of the invention (18) Please read the precautions on the r side before filling in the operating conditions for electroforming on this page to direct current A current density of about 7 to 10 A / dm 2 conducts electricity throughout the day, thereby growing into a sleeve with a diameter of about 3 mm. From this ferrule, the wire used for the master die is drawn, and the core wire 16 is removed by extrusion, or by dissolving in an acid or water-reducing solution. Depending on the metal type of the selected core wire 16, the core wire can be drawn, or extruded, dissolved in acid, alkali, etc. The electroforming liquid is determined according to the type of electroforming metal used for the purpose. The electroformed metal may be an electroformed metal such as nickel or an alloy thereof, iron or an alloy thereof, copper or an alloy thereof, cobalt or an alloy thereof, and a tungsten alloy. Corresponding to these metals, nickel sulfamate, nickel chloride, nickel sulfate, ferrous sulfamate, ferrous fluoborate, copper pyrophosphate, and copper sulfate can be used; copper fluoborate, copper fluosilicate, and titanium fluoride Liquids containing copper hydroxide, copper alkanolsulfonate, cobalt sulfate, and sodium tungstate as main components. Among them, nickel or an alloy containing nickel as a main component is preferably used as the metal for electroforming. In the case of electroforming nickel, especially an electroforming liquid containing nickel sulfamate as a main component can be effectively used from the aspects of ease of electroforming work, physical properties such as product hardness, chemical stability, and ease of welding. use. In addition, the electroforming liquid is printed with high-speed filtration using a filter with a filtration accuracy of about 0 · 1 to 2 // m. The consumer property cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs has controlled this heating temperature to a temperature range of about ± 5 ° C. Frequent activated carbon treatment removes organic impurities. If necessary, nickel-plated iron corrugated plates can be used as anodes, and carbon can be used as cathodes to remove metal impurities. The anode is determined by the intended electroformed metal. Therefore, nickel, iron, copper, cobalt, and the like are selected, and the shape of the metal can be appropriately used as a plate or a ball. When using a ball, put it in a titanium basket and cover it with a cloth bag that is resistant to electroforming liquids such as polyester. -21-This paper size applies the Chinese National Standard (CNS) A4 specification (210 × 297 mm) Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 539776 A7 __B7_ V. Description of the invention (19) The material used as the master mold can be used appropriately Aluminum, copper, and iron are alloys, metals such as gold and silver. When the core wire is removed by drawing or extruding, other metals may be appropriately used to treat the stainless steel wire, phosphor bronze wire and these surfaces. After the surface of the core wire is electroformed to form a metal film, the metal film is cut to a predetermined size, the core wire is removed from the metal film, and the ferrule is obtained by finishing. The removal of the core wire can be performed by drawing. At the same time, it can be removed by dissolving the drug, but the core wire with a small diameter is actually impossible to dissolve. The core wire is drawn by cutting the metal film obtained by electroforming to a predetermined size, and using a clamping tool to protrude a core wire end portion from one end face of the metal film block, and protrude the core wire from the other end face of the metal film block. Holding the protruding core wire is performed by drawing the core wire. At this time, the protrusions having a diameter smaller than the diameter of the core wire protrude from the center portion of the core wire, and the core wire ends on the opposite side are stretched to draw the core wire. [Embodiment 1] The present invention will be described based on an embodiment as follows. A phosphor bronze wire with a circular cross-section diameter of 0.126 mm and a length of 35 mm was mounted on the core wire support 21. This set of 100 core wires was set on the holder 28 and immersed in the electroforming bath 18. The core support is rotating at 60 times / minute, and the holder is rotating at 30 times / minute. The electroforming bath is a liquid containing nickel sulfamate as the main component. 50 anodes with nickel balls placed in a titanium mesh made of polyester bag are set around the holder, and the size is about 9 A / dm 2 The cathodic current density was applied by electroforming for 10 hours. Nickel electroformed products with an average diameter of 2 mm were obtained by electroforming. This electroformed body is cut into an NC automatic processing machine. The paper size is in accordance with the Chinese National Standard (CNS) A4 (210X297 mm) (talk about the precautions on the f * side before filling out this page)

-22- 539776 A7 B7 V. Description of the invention (20) The length is 12 mm, and one end is bored. The processed product is longitudinally oriented with the boring surface as the upper side. A core wire punch with a diameter of 0.126 nim is struck from above with a hammer having a protrusion smaller than this diameter, and pulled from below the processed product. Remove the core wire by making a part of the core wire that sticks out. Then, finishing is performed. The obtained product was a non-problematic product within a predetermined specification. In addition, by using an ultrasonic wave of 30 kHz at an intensity of 3 W / cm2, a product having a predetermined specification can be obtained similarly. [Example 2] A stainless steel core wire with a diameter of 0 ·· 1.2 6 m and a length of 3 5 5 m having a circular cross section was set on a clamping device for electroforming shown in Fig. 2. Further, as shown in Fig. 6, copper balls having a surface area of 0.2 cm 2 as a discharge body were connected to the lower portion of the core wire. On the other hand, a nickel metal plate was set in an electroforming bath containing nickel sulfamate as a main component. And immerse the core wire in the electroforming bath. A core stainless steel wire was used as a cathode, and a nickel plate was used as an anode. Electroforming was performed for 18 hours at a current density of about 10 A / dm 2. An electroformed body having an average diameter of about 2 mm to 5 mm was obtained. The outer diameter of the electroformed body in the longitudinal direction is in the range of 2.5 mm ± 0.5 mm, and the ferrule thus obtained has good uniformity, roundness, and coaxiality. [Embodiment 3] A stainless steel wire having a diameter of 0,126 mm, and a length of 3,55 mm was electroformed with a cross section of 1 0 // m of gold (resistivity 2.0 5 X 1 0-6 Ω cm) to obtain a core wire with a diameter of 0 · 136 mm. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) (please read the precautions on the back before filling this page)

Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs -23- 539776 A7 _ _B7 _ V. Description of the invention (21) The core wire is set in the clamping device for electroforming as shown in Figure 2. On the other hand, a nickel metal plate is set in an electroforming solution containing nickel sulfamate as a main component. And immersed in the electroforming bath. The core wire was used as the cathode, the nickel plate was used as the anode, and electroforming was performed for 18 hours at a current density of about 10 A / d m 2. With this electroforming, nickel electroformed articles having an average diameter of about 2.5 mm were obtained. The electroformed product has an outer diameter in the range of 2.5mm ± 0 · 05mm in the longitudinal direction, and a uniform electroformed product can be obtained. The ferrule can also be obtained from the electroformed product, which also has good circularity and coaxiality. [Example 4] · 'A phosphor bronze wire having a circular cross section with a diameter of 0, 126 mm, and a length of 3,55 mm was set on the electroforming apparatus shown in FIG. 2. On the other hand, a titanium porous metal cylinder made of a nickel metal block was set in an electroforming bath containing nickel sulfamate as a main component. This porous metal cylinder includes a metal plate 62 projecting substantially completely in the longitudinal direction of the cylinder shown in Fig. 11. Then, the metal plate 62 is set to face the rotation axis direction of the holder 28. The core wire 16 and the bracket 21 are immersed in each electroforming solution. The core wires are arranged in a circular shape with 100 wires. The porous metal cylinder is set so that the metal plate faces the rotation axis of the holder 28. The core wire was used as a cathode, and a porous metal cylinder containing a nickel block was used as an anode. Electroforming was performed for 18 hours at a current density of about 10 A / dm 2. Nickel electroformed bodies with an average diameter of about 2.5 mm were obtained by electroforming. The electroformed body has a uniform outer diameter within a range of 2.5 mm ± 0.5 mm along the longitudinal direction. The ferrule obtained from the electroformed product also has good circularity and coaxiality. This paper size applies to Chinese National Standard (CNS) A4 (210X297 mm) (please read the precautions on the back before filling this page).

Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs-24- 539776 A7 B7 V. Description of Invention (22) [Example 5] Set a bronze core wire with a circular cross-section with a diameter of 0 · 126 mm and a length of 355 mm on the core wire support Then, it is immersed in the electroforming apparatus 10 (FIG. 2). On the other hand, a meshed porous metal cylinder made of titanium in which a nickel metal block was placed was set in an electroforming bath containing nickel sulfamate as a main component. The core wire 16 and the core wire holder 21 are immersed in an electroforming solution. The core wires are arranged in a circular shape with 100 wires. Many? [: The metal tube is set so that the metal plate faces the rotation axis of the holder 28. The core wire was used as a cathode, and a porous metal cylinder containing a nickel block was used as an anode. Electroforming was performed for 18 hours at a current density of about 10 A / d m 2. An electroformed nickel body having an average diameter of about 2.5 mm was obtained by electroforming. The electroformed body can obtain a uniform electroformed body within a range of 2.5 mm m and 0.05 mm along the length. The sleeve obtained from the electroformed product also has good circularity and coaxiality. [Example 6] A bronze core wire with a diameter of 0.126 mm and a length of 3,55 mm in a circular cross section was set on a core wire holder shown in Fig. 9 and immersed in an electroforming apparatus. The setting load of the spring set on the stand is 0.1 5 N. On the other hand, a mesh porous metal cylinder made of titanium in which a nickel metal block was placed was set in an electroforming bath containing nickel sulfamate as a main component. The core wire 16 and the core wire holder 21 are immersed in an electroforming solution. The core wires are arranged in a circular shape with 100 wires. The porous metal cylinder is set so that the metal plate faces the rotation axis direction of the holder 2 8. The core wire is used as the cathode, and the porous metal tube containing nickel blocks is based on the Chinese paper standard (CNS) A4 (210X297 mm). -25- 539776 A7 B7 printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the Invention (23) Anode / Electroforming for 18 hours at a current density of about 10 A / dm 2. An electroformed nickel body having an average diameter of about 2.5 mm was obtained by electroforming. The electroformed body can obtain a uniform electroformed body in a range of 2.5 m m soil 0 · 0 5 m along the length direction. The ferrule obtained from the electroformed product also has good circularity and coaxiality. [Comparative Example] A core wire made of stainless steel (resistivity 9 0 X 1 0 _ 6 Ω c m) with a diameter of 0 · 1 2 6 m m and a length of 3 5 5 m m was used. Electroforming was performed in the same manner as in the embodiment. The obtained electroformed product has a larger diameter above and a smaller diameter below. That is, the diameter at the upper side is 2. 7 7 m m, and the diameter at the lower side is about 2. 4 2 m m. As described above, when a stainless steel core wire is used without a discharge body provided at the tip of the core wire, it can be seen that only non-uniform electroformed products can be obtained. [Industrial Applicability] When electroforming is performed on a plurality of long-sized core wires, while the core wires are rotated in the electroforming solution, the holders holding the plurality of core wire holders are rotated. Fortunately, this was a productive situation. Manufacture metal ferrules with uniform outer diameter, roundness and high coaxiality. According to the manufacturing of the sleeve according to the present invention, an expensive molding machine and a mold can be unnecessary, and only an inexpensive electroforming equipment can be used. In addition, there is no high-temperature firing step, so energy costs are low. In addition, the size transfer accuracy of the electroforming is very good, and the size of the product can be higher than that of the size measurement without the need to distinguish the amount. This paper size is applicable to the Chinese National Standard (CNS) A4 size (210X297 cm) (Notes on the back then fill out this page). ^^ 衣.

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-26 · 539776 A7 B7 V. Description of the invention (24) 〇 In addition, in recent years, due to the diversification and multifaceted optical communication, the requirements for ferrules for optical fibers are those with an outer diameter of 2.5 mm or less, especially for outer diameters of Very fine objects such as 1.25 mm, 0.9 mm, or 0.75 mm. It is impossible to manufacture ferrules with an outer diameter of 1 · 25 mm or less by pins. However, the metal ferrule produced by the manufacturing method and the device of the present invention can obtain extremely fine and excellent workability. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs This paper is sized to the Chinese National Standard (CNS) A4 (210 × 297 mm) -27-

Claims (1)

539776 A8 B8 C8 D8 Announcement 1 &quot; &quot; &quot; &quot; &quot; &quot; &quot; | ..: 1.: 11: ::. Ι »· Ι &quot;» ΙΙ &gt;: ΙΙΓ1 ~-, i-hole, patent application, No. 89 1 2835 Patent Application No. 1 ~ Chinese Patent Application Amendment (please read the precautions on the back before filling out this page) Amended on November 4, 1991, I4. 1. A method of manufacturing a metal ferrule, which is made by electroforming on the core wire A method of forming a metal film on the outer surface of a metal wire, and manufacturing a metal ferrule by drawing a core wire from the formed film, is characterized in that: a plurality of holders for holding a core wire holder for holding the core wire are arranged in a circle shape, and The peripheral part is provided with a plurality of straight clamping devices configured with metal used in electroforming, so that the core wire bracket can rotate on one side while rotating the holder to perform electroforming. 2 _ The manufacturing method of metal sleeves as described in item 1 of the scope of the patent application, which uses electro-forming using core wires with a resistivity of 5 X 1 0 _ 6 Ω cm or less. 0 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. 3 · The manufacturing method of the metal sheath according to item 1 of the scope of the patent application, wherein the first metal thin layer with an electrical resistivity of 5 X 1 0 to 6 Ω cm or less is formed on a core wire made of stainless steel or phosphor bronze, on which An electric prayer was entered in% ^ metal of a predetermined diameter. 4 · The manufacturing method of the metal ferrule as described in item 3 of the scope of the patent application, wherein the first metal is made of gold, silver, copper, aluminum and any alloy mainly composed of these metals, and the second metal is made of Made of nickel or nickel-based alloys. 5. The method for manufacturing a metal ferrule according to any one of the items 1 to 4 of the scope of application for a patent, wherein a conductive discharge body that maintains a conductive discharge from a power source of a core wire enters an electric prayer at a fast end side. This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) 539776 A8 B8 C8 _ D8 々, patent application scope 6 · The manufacturing method of metal ferrule as described in item 5 of the patent application scope, in which conductive discharge The resistivity of the body is less than 1 〇x 1 〇- 6 Ω cm or less 〇 (Please read the precautions on the back before filling out this page) 7 · The manufacturing method of the metal ferrule described in item 5 of the scope of patent application, where The surface area of the conductive discharge body is 10 to 100 times the surface area outside the core wire. 8. The method for manufacturing a metal ferrule as described in item 6 of the scope of the patent application, wherein the surface area of the conductive discharge body is 10 to 100 times the surface area outside the core wire. 9. The method for manufacturing a metal ferrule as described in item 1 of the scope of the patent application, wherein the core wire is made of stainless steel or phosphor bronze, and the electroformed metal is nickel or nickel-based alloy. 10 · The manufacturing method of metal sleeves as described in item 8 of the scope of patent application, wherein the core wire is made of stainless steel or phosphor bronze, and the electroformed metal is nickel or nickel-based alloy. 1 1 · The manufacturing method of metal ferrules printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs as described in any one of the scope of patent application, including springs and rubbers for tightening the core wire on the core wire support And other flexible mechanisms. 1 2 · The manufacturing method of the metal sleeve according to item 8 of the scope of the patent application, which includes a spring, rubber and other elastic mechanisms for tightening the core wire on the core wire support. 1 3 · The method of manufacturing a metal ferrule as described in item 11 of the scope of patent application, wherein the tension transmitted to the core wire by the elastic mechanism is below the elastic limit of the core wire. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 539776 A8 B8 C8 D8 VI. Application for patent scope 1 4 · The manufacturing method of metal ferrule as described in item 12 of patent scope, in which the elastic mechanism The tension transmitted to the core wire is below the elastic limit of the core wire. 1 5. The method for manufacturing a metal ferrule according to any one of items 1 to 4 of the scope of the patent application, wherein the clamping tool for accommodating the electroformed metal is formed toward the core wire so that the clamping tool is longitudinal A metal plate with a certain width in the direction substantially equal to the entire length of the clamping tool is vertically protruding from the side of the clamping tool. 16 · The manufacturing method of the metal sleeve according to item 8 of the scope of the patent application, wherein the clamping tool for accommodating the electroformed metal is formed toward the core wire so that the clamping tool is approximately the clamping tool in the longitudinal direction. A metal plate with a certain length over the entire length protrudes vertically from the side of the clamp. 17 • The method for manufacturing a metal ferrule as described in item 13 of the scope of patent application, wherein the clamping device is a titanium mesh cylinder. 18 · The method for manufacturing a metal sleeve according to item 14 of the scope of patent application, wherein the clamping device is a titanium mesh cylinder. 19 · The method of manufacturing a metal jacket according to any one of the first to fourth aspects of the patent application scope, wherein the core wire support is provided with a wide pillar extending toward the outside of the support. 20 · The manufacturing method of the metal sleeve according to item 8 of the scope of the patent application, wherein the core wire support is provided with a wide post extending toward the outside of the support. 2 1 · The method of manufacturing a metal ferrule as described in item 19 of the scope of patent application, wherein the pillars are arranged in a radial pattern. 2 2 · The paper size of the metal ferrule as described in item 19 of the scope of patent application is subject to the Chinese National Standard (CNS) A4 specification (210X297 mm)-&lt;-(Please read the precautions on the back first (Please fill in this page again) Order printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs -3- 539776 A8 B8 C8 D8 々, Patent Application Law, in which the pillars are rectangular plate-shaped. 2 3. The method for manufacturing a metal ferrule as described in item 19 of the application scope, wherein the number of pillars is 2 to 4. 24. A manufacturing device for a metal ferrule, which is characterized in that: inside the electroforming groove, a plurality of holders for holding a plurality of core holders for holding a core wire in a circular shape are arranged, and are arranged at the periphery thereof. Equipped with metal clamping tools, the core wire bracket can rotate on one side and the holder on the other. 25. The manufacturing device for the metal ferrule according to item 24 of the scope of the patent application, wherein the clamping device for placing the electroformed metal is arranged in a circle around the core wire support. 2 6 _ The manufacturing device of the metal ferrule according to item 25 of the scope of patent application, wherein the electroforming tank is provided with an ultrasonic generating device for stirring the electroforming liquid. 2 7 · The manufacturing device for the metal ferrule as described in item 24 or item 25 of the scope of patent application, wherein the conductive discharge body is kept on the distal side from the core power source. 28. The manufacturing device of the metal ferrule according to item 27 in the scope of the patent application, wherein the electrical resistivity of the conductive discharge body is less than 1 Ox 1 0-6 Ω cm. 29. The manufacturing device of the metal ferrule according to item 28 of the scope of the patent application, wherein the surface area of the conductive discharge body is 10 to 100 times the outer surface area of the core wire. 3 〇. The manufacturing device of the metal ferrule described in the scope of application for patent No. 24 or No. 25, wherein the core wire has a resistivity of 5x 1 6 Ω cm 〇 This paper standard applies Chinese National Standard (CNS) A4 specifications (210X297 mm)-(Please read the notes on the back before filling this page), 1T Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs-4-539776 A8 B8 C8 D8 VI. Patent Application Scope (please first (Please read the notes on the back and fill in this page) 3 1 · As for the manufacturing device of the metal ferrule described in the scope of patent application No. 24 or No. 25, where the core wire bracket is provided with springs and rubber for tightening the core wire And other flexible mechanisms. 3 2 · The manufacturing device for a metal ferrule as described in item 31 of the scope of patent application, wherein the tension transmitted by the elastic mechanism to the core wire is below the elastic limit of the core wire. 3 3 · The manufacturing device of the metal ferrule according to item 24 or item 25 of the scope of patent application, wherein the clamping tool for accommodating the electroformed metal is formed toward the core wire, and the clamping tool is longitudinally oriented. The metal plate with a certain width over the entire length of the clamp is vertically projected from the side of the clamp. 34. The manufacturing device for a metal ferrule according to item 33 of the scope of the patent application, wherein the clamping device is a titanium mesh cylinder. 3 5 · The manufacturing device for a metal jacket according to item 24 of the scope of patent application, wherein the core wire support is provided with a wide pillar extending toward the outside of the support. 36. The manufacturing device for a metal ferrule according to item 25 of the scope of the patent application, wherein the core wire support is provided with a wide pillar extending toward the outside of the support. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 37 • The manufacturing device of the metal ferrule as described in Item 35 of the scope of patent application, in which the pillars are arranged in a radial pattern. 38. The manufacturing device for a metal ferrule according to item 35 of the scope of patent application, wherein the pillars are rectangular plate-shaped. 39. The manufacturing device for a metal jacket according to item 36 of the scope of patent application, wherein the pillars are rectangular plate-shaped. This paper size applies to China National Standard (CNS) A4 specification (210X297 mm) ~: ^ 539776 ABCD VI. Application for patent scope 4 〇. The metal sleeve manufacturing device as described in item 35 of the patent scope, among which the pillar The quantity is 2 ~ 4. 4 1. The manufacturing device for a metal ferrule as described in any one of items 37 to 39 in the scope of patent application, wherein the number of pillars is 2 to 4 (please read the precautions on the back before filling in this Page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs This paper is sized for the Chinese National Standard (CNS) A4 (210X297 mm) -6-