METAL RIBBON MANUFACTURING SYSTEM

Abstract

The present invention aims to provide a metal ribbon manufacturing system that can provide a uniform flow of molten metal throughout the ribbon manufacturing process by actively controlling the flow speed of molten metal using other means without relying on the self-weight of the molten metal. According to the above purpose, the present invention provides a metal ribbon manufacturing system in which a melting unit into which molten metal enters is configured in a vacuum chamber, a nozzle unit at the bottom of the melting unit is closed together with the melting unit and evacuated to vacuum-melt a substance and the nozzle unit is open, then gas is injected into the vacuum chamber where the melting unit is configured to pressurize the molten metal so that the molten metal flows to the nozzle unit, and the flow speed of the molten metal can be precisely controlled by the gas injection.

Claims

1. A molten metal manufacturing and supply module characterized by the following: a molten metal manufacturing and supply module, which manufactures, discharges and supplies molten metal, comprises a melting unit that vacuum-melts materials; a nozzle unit installed at the bottom of the above melting unit and elutes the molten metal; and a pressure control unit that regulates the vacuum level and pressure for the above melting unit and the nozzle unit; the above melting unit includes a vacuum chamber for vacuum melting; a melting furnace for containing materials; a heater for heating the above melting furnace, and a power supply unit for supplying power to the heater; the above nozzle unit includes a nozzle formed at the bottom of the melting furnace to discharge the molten metal; a stopper that opens and closes the above nozzle from inside the nozzle; and an opening/closing unit at the bottom of the nozzle unit for opening and closing the above nozzle from outside the bottom of the vacuum chamber; the above pressure control unit includes a gas port for controlling the vacuum level, atmosphere, and air pressure of the vacuum chamber, wherein the vacuum chamber is opened to load the material into the melting furnace, the vacuum chamber is sealed, the opening/closing unit at the bottom of the nozzle unit is closed, the inside of the vacuum chamber is evacuated through the gas port, an inert gas is injected to create an inert atmosphere around the melting furnace, the heater is turned on and heats the melting furnace to make molten metal, and the opening/closing unit at the bottom of the nozzle unit is opened, the above pressure control unit supplies an inert gas to the vacuum chamber through the gas port to pressurize the molten metal, the stopper of the above nozzle unit is raised from the nozzle to open the nozzle and discharge the molten metal from the nozzle, and the pressure control unit controls the flow of the molten metal by controlling the pressure for pressurizing the molten metal.

2. The melting molten metal manufacturing and supply module unit according to claim 1, wherein the melting unit characterized by having a component analysis unit that can analyze the components of the molten metal after manufacturing the molten metal and before discharging it, and the component analysis unit that collects the molten metal from the melting furnace without breaking the vacuum of the vacuum chamber and transports it out of the vacuum chamber, and by adding a material of a specific component to the melting furnace if it is necessary to adjust the components of the molten metal.

3. The molten metal manufacturing and supply module unit according to claim 1, wherein the vacuum chamber is a molten metal manufacturing and supply module characterized by including a partition dividing the space along the top of the furnace, the gas port of the pressure control unit that includes the first gas port for controlling the pressure in the space above the melting furnace and the second gas port for controlling the pressure in the space below the melting furnace where the nozzle unit is located, the first gas port and the second gas port that discharge the gas inside the vacuum chamber to the outside in order to evacuate the vacuum chamber for vacuum melting and by increasing the cleanliness during vacuum melting of the molten metal by injecting inert gas into the space below the melting furnace in the vacuum chamber through the first gas port and the second gas port after evacuation to create an inert atmosphere.

4. The molten metal manufacturing and supply module according to claim 3, characterized by an inert gas injected through the first gas port to pressurize the molten metal for discharge of the molten metal.

5. The molten metal manufacturing and supply module according to claim 1, wherein the nozzle unit is characterized by raising and rotating a stopper to discharge molten metal by further including a stopper control unit and the stopper control unit that includes a linear member connected to the stopper and a rotational conversion member.

6. The molten metal manufacturing and supply module according to claim 1, wherein the discharge of the molten metal is controlled by the pressurizing force of the above pressure control unit to apply the slit size of the nozzle to 0.5 mm or less.

7. The molten metal manufacturing and supply module according to claim 6, wherein the discharge of the molten metal is not dependent on the self-weight of the molten metal.

8. A ribbon manufacturing system characterized by including the above molten metal manufacturing and supply module of claim 1; the position control unit of the molten metal manufacturing and supply module; and the wheel unit placed at the bottom of the molten metal manufacturing and supply module; wherein the position control unit of the molten metal manufacturing and supply module includes an elevating and lowering driving device for elevating and lowering the molten metal manufacturing and supply module and an X-Y motion stage, the wheel unit includes a wheel and a support that fixes the wheel without vibration, and the above molten metal manufacturing and supply module is lowered after opening/closing unit at the bottom of the nozzle unit is opened by the position control unit of the above molten metal manufacturing and supply module to primarily control the gap D between the lower part of the nozzle and the wheel, and then the stopper is opened to discharge the molten metal onto the wheel, and the gap D is secondarily precisely controlled to adjust the thickness of the thin plate being manufactured by using the elevating/lowering drive device and the X-Y motion stage to align.

9. The ribbon manufacturing system according to claim 8, which is characterized by the wheel that rotates at 30 to 50 m/sec for ribbon manufacturing and is cleaned using high-pressure gas or a scraper during the ribbon manufacturing process.

10. The ribbon manufacturing according to claim 9, provides a ribbon manufacturing system characterized by a continuous process.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Drawing 1 is a schematic diagram showing the configuration of a conventional metal ribbon manufacturing system.

[0031] Drawings 2a and 2b are schematic diagrams showing the configuration of a metal ribbon manufacturing system according to the present invention.

[0032] Drawings 3a and 3b are cross-sectional diagrams showing the embodiment of a molten metal production and supply unit of a metal ribbon manufacturing system according to the present invention.

[0033] Drawing 4 is the embodiment of a metal ribbon manufacturing system according to the present invention showing the state where the molten metal production and supply unit is raised.

[0034] Drawing 5 is the embodiment of a metal ribbon manufacturing system according to the present invention showing the state where the molten metal production and supply unit is lowered.

[0035] FIG. 6 is a table showing the thickness of a metal ribbon manufactured by a metal ribbon manufacturing system according to the present invention.

[0036] Drawing 7 shows the results of XRD analysis of a soft magnetic wide ribbon manufactured by a metal ribbon manufacturing system according to the present invention.

[0037] Drawing 8 is a graph that measured the magnetic moment of a soft magnetic wide ribbon manufactured by a metal ribbon manufacturing system according to the present invention using a vibrating sample magnetometer.

[0038] Drawing 9 shows the core characteristics made using a soft magnetic wide ribbon manufactured by a metal ribbon manufacturing system according to the present invention.

DETAILED DESCRIPTION

[0039] With reference to the attached drawings, preferred embodiments of the present invention will be described in detail hereinafter. High-performance metal ribbons related to electric vehicle components contain a large amount of Fe to enhance performance and include high-melting-point materials. These high-performance metal ribbons are manufactured by melt spinning using a spray nozzle made of a ceramic material that does not react easily with Fe and can withstand high temperatures. The performance of high-efficiency ribbon cores is highly affected by the ribbon (a synonym for sheet) thickness and surface quality. In particular, the thinner the ribbon, the higher the investment rate in the core, resulting in higher efficiency. In addition, the better the surface quality (surface roughness), the higher the space factor of the core, resulting in higher efficiency.

[0040] In order to improve the quality of ultra-thin ribbons of 10 to 100 m, the molten metal should land on the wheel while maintaining a uniform flow diameter and speed.

[0041] The conventional ribbon metal manufacturing system is configured as shown in Drawing 1.

[0042] It includes a ladle (5) that melts a material to create molten metal and supplies the molten metal to a tundish (10) below, and a wheel (20) located below the nozzle of the tundish (10), and a nozzle is located at the bottom of the tundish to flow the molten metal to the wheel. This conventional system uses the self-weight of the molten metal as a means of eluting the molten metal from the nozzle located at the bottom of the tundish. In other words, the molten metal flows out of the nozzle by the pressure of the molten metal's self-weight and lands on the wheel. As the ribbon metal manufacturing process progresses, the molten metal inside the tundish decreases, and the molten metal's self-weight decreases, accordingly. Due to the decrease in the molten metal's self-weight, the flow of the molten metal flowing out of the nozzle has a different thickness and speed than those at the beginning of the process, so the uniformity of the metal ribbon manufactured through the entire process is poor, resulting in low yield and poor quality.

[0043] In order to improve this problem, the present invention proposes a new metal ribbon manufacturing system that can maintain the flow of molten metal flowing out of a nozzle consistently throughout the process.

[0044] In order to increase the thickness and surface quality of a soft magnetic alloy ribbon, the present invention provides a metal ribbon system that controls the flow of molten metal by controlling the air pressure of a melting unit without relying on the molten metal's self-weight.

[0045] The present invention provides a metal ribbon manufacturing device including a melting unit, a nozzle unit, a wheel unit for rapidly cooling molten metal to manufacture ribbons, and a pressure control unit for providing an appropriate vacuum or pressure according to the manufacturing and discharge of the molten metal.

[0046] In other words, the present invention provides a metal ribbon manufacturing system in which a melting unit into which molten metal enters is configured in a vacuum chamber, a nozzle unit at the bottom of the melting unit is closed together with the melting unit and evacuated to vacuum-melt a substance, and the nozzle unit is open, then gas is injected into the vacuum chamber where the melting unit is configured to pressurize the molten metal so that the molten metal flows to the nozzle unit, and the flow speed of the molten metal can be precisely controlled by the gas injection.

[0047] In the above, when melting a material in a vacuum, an inert gas such as Ar is supplied to the melting unit at a predetermined pressure to manufacture a high-purity molten metal.

[0048] In the above, a metal ribbon manufacturing system is provided that can precisely control the gap between the wheel and the nozzle by lowering or raising the melting unit and the nozzle unit themselves against the wheel.

[0049] Drawing 2a is a schematic diagram showing the configuration of a metal ribbon manufacturing system according to the present invention.

[0050] The melting unit (100) of the present invention places a melting furnace (110) in a vacuum chamber (120) so that vacuum melting can be carried out. A heating heater (150) is arranged on the outside of the melting furnace (110), and a nozzle unit (200) for flowing molten metal is installed at the bottom of the melting furnace (110). When the vacuum chamber (120) is evacuated, an opening/closing unit at the bottom of the nozzle unit (250) is installed to close the above nozzle unit (200). A vacuum chamber (120) having a partition (130) at the top of a melting furnace (110) is configured with a pressure control unit (300) that controls the flow of molten metal above the partition (130). In other words, a gas port (first gas port) that can provide air pressure for evacuation of the entire chamber (120) and the flow of the molten metal after vacuum melting is installed. In addition, a separate gas port (second gas port) that can control the atmosphere of the melting section is configured in the part where the melting furnace is arranged below the partition (130).

[0051] Below the nozzle unit (200), a wheel unit (400) including a wheel and a support is arranged, which is configured as a vibration-free wheel. The part including the melting unit (100), nozzle unit (200), and pressure control unit (300), excluding the wheel unit, is conveniently referred to as a molten metal manufacturing and supply module.

[0052] The chamber (120) is opened, a material is put in the melting furnace (110), the chamber (120) is sealed, and a vacuum is formed at two gas ports. At this time, the opening/closing unit at the bottom of the nozzle unit (250) is closed to prevent the vacuum from leaking to the nozzle unit (200). In addition, the ribbon manufacturing system is equipped with a stopper and a stopper opening/closing device that directly opens and closes the nozzle of the nozzle unit (200). In other words, the nozzle is blocked by the stopper on the inside, and the opening/closing part at the bottom of the nozzle unit (250) closes the nozzle from the outside to catch vacuum.

[0053] When the vacuum chamber is closed and evacuated, an inert gas atmosphere is created in the chamber part where the melting furnace is located, the melting furnace (110) is heated by a heater (150) to manufacture molten metal, and when the molten metal manufacturing is complete, the opening/closing unit at the bottom of the nozzle unit (250) is opened. Even though an inert atmosphere has been created, a vacuum level lower than atmospheric pressure is maintained, so the molten metal does not leak from the nozzle of the nozzle unit (200).

[0054] When the stopper is lifted and removed from the nozzle while pressurizing the molten metal by supplying an inert gas into the chamber (120) from the pressure control unit (300), the molten metal flows out from the nozzle of the nozzle unit (200) and lands on the wheel to manufacture a ribbon.

[0055] During the ribbon manufacturing process, the pressure control unit (300) controls the air pressure so that the molten metal has a constant flow regardless of changes in the molten metal's self-weight in the melting furnace.

[0056] On the other hand, before manufacturing and pouring the molten metal, the components of the molten metal are collected and analyzed to determine whether they have the desired composition, and then a component control unit (500) is configured to supplement the components additionally. The component control unit (500) installs a gate with a vacuum cover in the chamber (120) so that the molten metal can be collected and taken out of the chamber (120) without breaking the vacuum of the vacuum chamber (120).

[0057] Also, the gap D between the nozzle bottom of the nozzle unit (200) and the upper surface of the wheel is an important variable in ultra-thin ribbon manufacturing. Thus, the present invention controls the above gap D before pouring the molten metal. The above gap D is adjusted by raising and lowering the entire vacuum chamber (120), that is, the entire molten metal manufacturing and supply module. To this end, a position control unit of the molten metal manufacturing and supply module is configured.

[0058] In the above, a tundish can be used as a melting furnace (110). The heater (150) for heating the melting furnace (110) can be configured as an induction heater, and is equipped with a high-frequency power supply for turning on the heater (150).

[0059] Drawing 3a is a cross-sectional configuration diagram showing the embodiment of a molten metal manufacturing and supply module of a metal ribbon manufacturing system according to the present invention. It is almost the same as that described in Drawing 2a, but shows a more detailed configuration.

[0060] A high-frequency power feedthrough (170) is installed as a power supply unit in a vacuum chamber (120). The feedthrough connects a power supply unit and an induction heating coil, that is, a heater (150), and when a high-frequency current is applied to the heater through the feedthrough, an induced current is generated in an electrically conductive material existing inside the coil due to a magnetic field generated in the coil. Depending on the material, the melting furnace (110) is heated to about 1270 to 1330 C., preferably about 1300 C. in the case of manufacturing a soft magnetic ribbon of the present embodiment. The configuration of the nozzle unit (200) includes a nozzle (210) through which molten metal can flow out, a stopper (220) for opening and closing the nozzle itself, a stopper control unit (230) for raising the stopper (220) to open the nozzle (210) and rotating the stopper to uniformly discharge the molten metal, and an opening/closing unit at the bottom of the nozzle unit (250). The opening and closing operation of the opening/closing unit at the bottom of the nozzle unit (250) is carried out by an opening and closing cylinder. A cooling unit is installed in the opening/closing unit at the bottom of the nozzle unit (250) to prevent overheating.

[0061] The stopper control unit (230) is connected to the stopper (220) and the linear member and the rotational conversion member connected to the stopper to control the stopper. The stopper (220) blocks the nozzle to control the initial pressure. For molten metal discharge, the stopper is raised by the stopper control unit (230) and then rotated to discharge the molten metal uniformly through the nozzle.

[0062] In the present invention, the nozzle diameter can be 0.5 mm or less, and can be selectively configured between 0.2 and 0.5 mm.

[0063] In this embodiment, the nozzle is configured in a slit shape to manufacture a wide ribbon, the width of the nozzle W is optionally configured from 5 to 300 mm, and the diameter of the nozzle slit S is set to 0.2 to 0.5 mm. Refer to FIG. 3b for this information.

[0064] The pressure control unit (300) has the first gas port (310) and the second gas port (320), and both gas ports discharge gas to the outside of the vacuum chamber (120) when forming a vacuum for vacuum melting. Before heating the melting furnace, an inert gas is supplied to the chamber (120) to create an inert atmosphere. The inert gas is supplied to the entire chamber through the first gas port (310) and the second gas port (320). The pressure of the inert gas atmosphere is formed at the atmospheric pressure level through the second gas port (320) in the space below the chamber separated by the chamber partition (130) (the space where the nozzle unit is located), and is adjusted to 0.03 to 0.7 bar, preferably 0.03 to 0.5 bar, in the space above the chamber through the first gas port (310). A high-purity molten metal can be manufactured due to the inert atmosphere.

[0065] When the melting furnace is heated to manufacture molten metal, the stopper is opened at a pressure of 0.07 to 0.13 bar, preferably 0.1 bar, in the upper space of the chamber through the first gas port (310) to discharge the molten metal from the nozzle. In other words, the first gas port (310) controls the discharge of the molten metal by adjusting the pressure of the upper space of the melting furnace.

[0066] The vacuum level within the chamber for vacuum melting is set to 510.sup.5 torr510.sup.4 torr, preferably 10.sup.4 torr, and the gas pressure of the first gas port (310) during melting can be controlled to 60,000 to 70,000 Pa.

[0067] Before discharging the molten metal, the molten metal can be sampled and materials can be added through the component control unit (500) to analyze the components of the molten metal and supplement the composition by adding materials. If there is no need to add materials, it can be omitted.

[0068] After the molten metal is manufactured in the molten metal manufacturing and supply module, the opening/closing unit at the bottom of the nozzle unit (250) is opened, and the gap D with the wheel located at the bottom of the molten metal manufacturing and supply module is adjusted before the molten metal is discharged. Even when the opening/closing unit at the bottom of the nozzle unit (250) is opened, the pressure inside the chamber is lower than the pressure outside the chamber, and the stopper blocks the nozzle, preventing the molten metal from leaking.

[0069] Drawings 4 and 5 show the adjustment of the above gap D.

[0070] Drawing 4 is a drawing showing the embodiment of a metal ribbon manufacturing system according to the present invention in which the molten metal manufacturing and supply module is raised and the gap D between the wheel and the bottom of the nozzle is lengthened.

[0071] The position of the molten metal manufacturing and supply module is controlled by an up/down drive device (600) for lifting and lowering and an X-Y motion stage (650). The up/down drive device (600) and the X-Y motion stage (650) align the position of the molten metal manufacturing and supply module before it discharges molten metal, and the up/down drive device (600) is driven again at the beginning of molten metal discharge to find and align a gap D appropriate for the ribbon thickness.

[0072] The up/down drive device (600) may be configured in a hydraulic manner. Drawing 4 also shows that the wheel of the wheel unit is connected to the motor (40) by a rotary joint (50). The gap D when the molten metal manufacturing and supply module is lifted in Drawing 4 is 350 to 450 mm, preferably about 400 mm.

[0073] Drawing 5, the embodiment of a metal ribbon manufacturing system according to the present invention, is a drawing showing a state in which a molten metal manufacturing and supply module is lowered.

[0074] After the molten metal is manufactured, the molten metal manufacturing and supply module is lowered for the ribbon metal manufacturing process and D is adjusted, and D is selected as a predetermined value between 0.2 and 0.6 mm and maintained constant during the sheet metal process. Drawing 5 shows a weight balance unit (610) in the up/down drive device (600).

[0075] The wheel of the present invention consists of a vibration-free copper wheel. The wheel is cooled by a cooling device and rotated at 30 to 50 m/sec. During the ribbon manufacturing process, the copper wheel is cleaned using high-pressure gas (70) and/or a scraper (80) (see Drawing 2b). Cleaning during the process improves the surface roughness of the copper wheel, thereby improving the quality of ultra-thin ribbons.

[0076] The metal ribbon manufacturing process by the metal ribbon manufacturing system of the present invention is as follows:

[0077] The chamber is opened to load the material into the melting furnace, the chamber is sealed (including closing the opening/closing unit at the bottom of the nozzle unit (250)), the inside of the chamber is evacuated to 510.sup.5 torr510.sup.4 torr using gas ports, an inert gas atmosphere such as Ar is created at atmospheric pressure in the space where the melting furnace is located. the upper space of the melting furnace is controlled to an inert gas atmosphere of 0.03 to 0.5 bar, induction heating power is applied to the melting furnace heater to heat to about 1300 C. to melt the material, the alloy components are extracted, and additional molten metal components are added for adjustment (optional), the opening/closing unit at the bottom of the nozzle unit (250) is opened and the molten metal manufacturing and supply module is lowered to primarily adjust the gap D between the nozzle and the wheel, an inert gas is supplied to the vacuum chamber to pressurize the molten metal with the gas, the wheel is rotated, the air pressure in the upper space of the melting furnace is adjusted to about 0.1 bar, the stopper of the nozzle unit of the melting furnace is opened to allow the molten metal to flow, the height and position of the molten metal manufacturing and supply module are precisely aligned (secondary adjustment) to adjust the thickness of the ribbon wound on the wheel, and then ribbon manufacturing is continuously performed.

[0078] The metal ribbon wound on the wheel can be manufactured as an ultra-thin ribbon of less than 20 m, and has excellent thickness and surface uniformity.

[0079] The advantages of the present invention are summarized as follows:

[0080] First, the molten metal is uniformly pressurized under vacuum melting and an inert atmosphere, thereby melting the master alloy with high purity.

[0081] When nitrogen or oxygen is introduced into the molten metal, oxides or nitrides are formed inside the molten metal, which causes poor surface roughness of the ribbon and pores. Since ultra-thin ribbons are sensitive to impurities during the manufacturing process, manufacturing of high-purity molten metal improves the quality of ultra-thin ribbons.

[0082] Second, the present invention has an alloy element control function, making it possible to sample and analyze the components of the molten metal to add necessary components.

[0083] Third, the flow of the molten metal is controlled uniformly by the stopper from the beginning of the ribbon manufacturing process.

[0084] In the past, there was no stopper structure, making it impossible to control the pressure early. The molten metal flowed down at low initial pressure, and there were differences in the thickness and surface roughness of the ribbon due to uneven pressures in the early, middle, and late stages of the process. However, according to the stopper configuration of the present invention, the stopper is opened while the initial pressure is applied, and a uniform molten metal is discharged to the nozzle. Therefore, thin sheets (or ribbons) having a uniform thickness can be manufactured at the beginning and throughout the process.

[0085] Fourth, the pressure of the space where the melting furnace (110) and the nozzle unit (200) are located and the space above the melting furnace (110) can be separately controlled in the chamber.

[0086] In the past, the melting pressure was applied to the molten metal by the self-weight of the tundish, leading to a limit to manufacturing the small slit (nozzle) size. In other words, it was impossible to apply the nozzle diameter or slit size to 0.5 mm or less. However, the present invention can separately control the pressure of the upper space of the melting furnace and the lower space where the nozzle unit is located, thus applying the slit size of the nozzle of 0.5 mm or less. This enables the manufacturing of an ultra-thin ribbon.

[0087] Fifth, the wheel was manufactured as a copper wheel and installed without vibration, minimizing the thickness deviation of the ultra-thin ribbon.

[0088] During ribbon manufacturing, the surface roughness of the copper wheel can be also controlled by continuous cleaning of the copper wheel (using high-pressure gas and/or a scrubber). Continuous cleaning of the copper wheel leads to improved quality of the ultra-thin ribbon surface. In other words, during the process of manufacturing and continuously discharging metal ribbons from the copper wheel, the wheel is cleaned at a location that does not interfere with the discharge of the ribbons, thereby improving the quality of the ribbons.

[0089] FIG. 6 is a table showing the thickness of a metal ribbon manufactured by a metal ribbon manufacturing system according to the present invention.

[0090] When the gas pressure pressurizing the molten metal is set to 60,000 Pa, the wheel speed to 33 m/sec, the inlet thickness to 0.5 mm, and the gap D between the nozzle and the wheel is set to 0.6 mm, the ribbon thickness is to 22.1 m, and when D=0.2 mm, it is 17.2 m, and thinner ribbons are manufactured as D gets smaller.

[0091] When the gas pressure is 70000 Pa, D=0.2 mm, inlet thickness (slit size S) is 0.2 mm, and wheel speed is 42 m/sec, the ribbon thickness is 13.5 m, and when the wheel speed is 48 m/sec, the ribbon thickness is 12.9 um, indicating that the ribbon gets thinner as the wheel speed increases.

[0092] In other words, the higher the gas pressure, the smaller the inlet thickness S, the shorter the gap D between the nozzle and the wheel, and the higher the wheel speed, the thinner the ribbon. In addition, the ribbon thickness was measured at a predetermined interval from the front end to the rear end of the ribbons manufactured in embodiments 4 and 5. As a result, the deviation was very small, with a maximum of 0.3 um in the case of embodiment 4 and a maximum of 0.1 um in the case of embodiment 5. The ribbon thickness deviation was smaller under the process conditions for manufacturing thinner ribbons.

[0093] Drawing 7 shows the results of XRD analysis of a soft magnetic wide ribbon manufactured by a metal ribbon manufacturing system according to the present invention.

[0094] In this embodiment, an Fe-based amorphous ribbon was manufactured and XRD analysis was performed, showing that it was amorphous. The XRD analysis result after heat treatment of the ribbon showed that the ribbon was nanocrystallized.

[0095] Drawing 8 is a graph that measured the magnetic moment of a soft magnetic wide ribbon manufactured by a metal ribbon manufacturing system according to the present invention using a vibrating sample magnetometer. It shows that the magnetic moment is further strengthened after heat treatment than before heat treatment.

[0096] Drawing 9 shows the core characteristics made using a soft magnetic wide ribbon manufactured by a metal ribbon manufacturing system according to the present invention. The magnetic properties of the soft magnetic core are excellent due to its high inductance, high Q factor, and high permeability.

[0097] Unless otherwise defined in the foregoing, all technical and scientific terms used in this specification have the same meaning as commonly understood by a skilled expert in the art to which the present invention pertains. In addition, terms defined in commonly used dictionaries should not be ideally or excessively interpreted, unless explicitly specifically defined. When a part of the entire specification is expressed as include or have a certain component, this does not exclude other components, but rather means that other components can be included, unless specifically stated otherwise.

[0098] In addition, the singular may include the plural depending on the context.

[0099] Also in this specification, the terms on top of , above , or on include cases where the object is directly placed on top of a target object, as well as cases where there is another part in between.

[0100] Also in this specification, the terms under below or at the bottom of include cases where the object is directly placed on top of a target object, as well as cases where there is another part in between.

[0101] Also in this specification, the terms on top of , on or above or below or under mean locating above or below the target part and do not necessarily mean locating above or below the direction of gravity.

[0102] Also in this specification, the terms between or among include cases where there is a space between objects as well as cases where there is another part in between

[0103] The rights of the present invention are not limited to the embodiments described above, but are defined by what is described in the claims, and it is obvious that a person with ordinary skill in the art to which the present invention pertains can make various modifications and adaptations within the scope of the rights described in the claims.

DESCRIPTION OF THE SIGNS

[0104] Ladle (5) [0105] Tundish (10) [0106] Wheel (20) [0107] Melting unit (100) [0108] Melting furnace (110) [0109] Vacuum chamber (120) [0110] Partition (130) [0111] Heater (150) [0112] High frequency power feedthrough (170) [0113] Nozzle unit (200) [0114] Nozzle (210) [0115] Stopper (220) [0116] Stopper control unit (230) [0117] Opening/closing unit at the bottom of the nozzle unit (250) [0118] Pressure control unit (300) [0119] First gas port (310) [0120] Second gas port (320) [0121] Wheel unit (400) [0122] Component control unit (500) [0123] Up and down drive device (600) [0124] Weight balance unit (610) [0125] X-Y motion stage (650)