JP2008264856A - Metal fine wire production device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a metal fine wire production device where the wettability of a rotary plate to a molten metal is regulated, so as to stably perform the production of a metal fine wire, and also, a production yield can be improved. <P>SOLUTION: In the case rugged parts are used as a temperature control means for controlling the temperature of a rotary plate, annular grooves 141C composing rugged parts are formed on the surface of the rotary plate 141. In the rotary plate 141, heat radiability improves by the increase of the surface area, thus the increase of the temperature in the rotary plate 141 can be suppressed. When such rugged parts are formed, in consideration of the production conditions of the metal fine wire, by suitably setting the shape of the rugged parts, the forming positions of the rugged parts, the ratio between the surface area and volume of the rotary plate 141 or the like, the temperature of the rotary plate can be set to a prescribed temperature or below. In this way, the wettability of the rotary plate 141 to a molten metal can be set to a desired range. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an apparatus for producing a fine metal wire that forms a molten metal by melting an end portion of a metal material and forms a fine metal wire from the molten metal using a rotating plate, and in particular, controls the wettability of the rotating plate with respect to the molten metal. It relates to technical improvements.

  As a method for producing a thin metal wire, for example, a molten metal extraction method is known. FIG. 11 shows a schematic configuration of the metal fine wire manufacturing apparatus 10 using the molten metal extraction method, (A) is a side sectional view, and (B) is a sectional view taken along line 11B-11B in (A). In the metal fine wire manufacturing apparatus 10, the material holding unit 12 disposed on the lower side of the rotating plate 11 accommodates the metal material therein so as to be movable upward. The heating unit 13 forms a molten metal (molten metal) Ma by melting the metal material M protruding from the upper end of the material holding unit 12. Then, the molten metal Ma comes into contact with the peripheral edge portion 11a of the rotating plate 11, is sent out in the tangential direction of the rotating plate 11, and is rapidly cooled. Thereby, the metal fine wire F of a uniform wire diameter is manufactured.

  As the rotating plate 11 of such a thin metal wire manufacturing apparatus 10, a rotating plate made of Cu, Cu alloy, Al, or Al alloy (Patent Document 1), Cu, Cu alloy, Mo, Ta, W, or There is a rotating plate made of Ir (Patent Document 2). In these rotating plates, the front and back surfaces are flat and the peripheral edge has a V-shaped edge.

JP-A-9-29399 (summary) JP 11-189926 A (summary)

  By the way, in manufacture of the metal fine wire F, the heat | fever conducted from molten metal Ma to the rotating plate 11 accumulate | stores there, and the temperature of the rotating plate 11 rises. However, in this case, when the temperature of the rotating plate 11 exceeds a predetermined upper limit temperature, the wettability of the rotating plate 11 with respect to the molten metal Ma is too good, so that the molten metal Ma adheres to the rotating plate 11, and as a result, the fine metal wire F becomes a short line, making it impossible to manufacture. On the other hand, when the temperature of the rotating plate 11 becomes lower than a predetermined lower limit temperature, the wettability of the rotating plate 11 with respect to the molten metal Ma is too bad. It occurs frequently and, as a result, the manufacturing yield decreases. As described above, in manufacturing the fine metal wire F, it is necessary to adjust the wettability of the rotating plate 11 with respect to the molten metal Ma.

  Therefore, the present invention provides a metal fine wire manufacturing apparatus that can stably manufacture a thin metal wire for a long time by adjusting the wettability of the rotating plate with respect to the molten metal and can improve the manufacturing yield. The purpose is that.

  The apparatus for producing a fine metal wire of the present invention has a heating means for forming a molten metal by melting an end portion of a metal material, a peripheral portion, and the molten metal is cooled by contact between the peripheral portion and the molten metal. It is characterized by comprising a rotating plate that feeds the cooled molten metal by rotation to form a fine metal wire, and temperature control means for controlling the temperature of the rotating plate.

  In the metal fine wire manufacturing apparatus of the present invention, the wettability of the rotating plate with respect to the molten metal can be set within a desired range by controlling the temperature of the rotating plate with the temperature control means. Adhesion and sag of the molten metal from the rotating plate can be prevented. Therefore, it is possible to stably manufacture the thin metal wire for a long time and to improve the manufacturing yield.

  In the metal fine wire manufacturing apparatus of the present invention, it is preferable that the set temperature of the rotating plate by the temperature control means is set to the following temperature. For example, the set temperature of the rotating plate can be set to 120 ° C. or less by the temperature control means. When the set temperature of the rotating plate exceeds 120 ° C., the wettability of the rotating plate with respect to the molten metal is too good, so that the molten metal adheres to the rotating plate, the manufacture of the metal thin wire becomes unstable, and the manufacturing yield decreases. On the other hand, the occurrence of the above problem can be prevented by setting the set temperature of the rotating plate to 120 ° C. or lower as described above.

  Moreover, it is more preferable to set the set temperature of the rotating plate to 20 to 100 ° C. or less. In this case, natural fibers or synthetic fibers can be used as a constituent material of the cleaning member that removes deposits on the peripheral edge of the rotating plate. When the set temperature of the rotating plate is less than 20 ° C., the wettability of the rotating plate with respect to the molten metal is too bad, so that the sag of the molten metal frequently occurs and the manufacturing yield decreases. On the other hand, when the set temperature of the rotating plate exceeds 100 ° C., the fiber that is a constituent material of the cleaning member wears violently due to insufficient heat resistance, and thus cannot be manufactured for a long time. On the other hand, the occurrence of the above problem can be prevented by setting the set temperature of the rotating plate to 20 to 100 ° C. as described above.

The metal wire manufacturing apparatus of the present invention can use various configurations as temperature control means.
For example, as the temperature control means, a concavo-convex portion formed in a portion other than the peripheral portion of the rotating plate can be used. In this aspect, the heat dissipation is improved by increasing the surface area due to the formation of the concavo-convex portions, so that the temperature rise of the rotating plate can be suppressed. Furthermore, since a simple structure called a concavo-convex portion can be used as the temperature control means, the cost of the apparatus can be reduced as compared with the temperature control means using cooling water. It is preferable that the concavo-convex portion is oriented in a direction intersecting the rotation direction of the rotating plate. In this embodiment, the stir of the high-temperature atmospheric gas in the vicinity of the rotating plate is prevented by stirring by the uneven portion of the atmospheric gas in the vicinity of the rotating plate, and the low-temperature atmospheric gas is always supplied (sprayed) to the surface of the rotating plate. . Therefore, since heat dissipation improves, the temperature rise of a rotating plate can further be suppressed.

  Further, it is preferable that the ratio (= surface area / volume) of the surface area to the volume of the rotating plate is 4 or more. In this aspect, the temperature rise of the rotating plate can be effectively suppressed. When forming the concavo-convex part as described above, considering the manufacturing conditions of the fine metal wire, by appropriately designing the shape of the concavo-convex part, the formation position of the concavo-convex part, the ratio between the surface area and volume of the rotating plate, The temperature of the rotating plate can be set below a predetermined temperature.

  Further, as the temperature control means, a through hole formed in the thickness direction of the rotating plate can be used. In this aspect, since the heat capacity of the rotating plate is reduced by the through hole, the rotating plate is easily cooled. Further, the atmospheric gas in the vicinity of the rotating plate is agitated by the through hole, the stagnation of the high temperature atmospheric gas in the vicinity of the rotating plate is prevented, and the low temperature atmospheric gas is always supplied (sprayed) to the surface of the rotating plate. Therefore, since heat dissipation improves, the temperature rise of a rotating plate can be suppressed. Moreover, since a simple structure called a through hole can be used as the temperature control means, the cost of the apparatus can be reduced as compared with the temperature control means using cooling water.

  Furthermore, it is preferable that the volume opening ratio of the through hole with respect to the rotating plate is 30 to 70%. In this aspect, the temperature rise of the rotating plate can be effectively suppressed. When forming the above-mentioned through holes, in consideration of the manufacturing conditions of the fine metal wires, the shape of the through holes, the formation positions of the through holes, the volume opening ratio of the through holes with respect to the rotating plate, and the like can be appropriately designed. The temperature of the plate can be set below a predetermined temperature.

  Furthermore, the rotating shaft of the rotating plate has a main body portion for rotating the rotating plate, and a flange portion that is integrally formed with the main body portion and extends to the vicinity of the peripheral edge portion on at least one surface of the rotating plate. Can do. In this case, the temperature control means can have a hollow part formed in the main body part and the flange part of the rotating shaft, and a cooling means for circulating fluid in the hollow part. In this aspect, the temperature of the rotating plate can be controlled by circulating the fluid through the hollow portion formed in the main body portion and the flange portion of the rotating shaft using the cooling means. In addition, copper or a copper alloy can be used as the material of the rotating plate. It goes without saying that the temperature control means can be used in appropriate combination.

  According to the apparatus for producing fine metal wires of the present invention, by controlling the temperature of the rotating plate by the temperature control means, the fine metal wires can be produced stably for a long time, and the production yield can be improved.

(1) First Embodiment (1-1) Configuration of Embodiment Hereinafter, a thin metal wire manufacturing apparatus 100 according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side cross-sectional view illustrating the overall schematic configuration of the metal fine wire manufacturing apparatus 100. FIG. 2 shows a partial configuration of the rotating plate 141 having the grooves 140C constituting the concavo-convex portion as the temperature control means of the present invention, and is an enlarged side cross-sectional view in the direction perpendicular to the plane of FIG.

  The metal fine wire manufacturing apparatus 100 is an apparatus that manufactures a metal fine wire F having a uniform wire diameter using a rod-shaped metal material M as a material, for example, by using a molten metal extraction method. The metal wire manufacturing apparatus 100 includes a chamber 101 that can be sealed. In the chamber 101, there are a material supply unit 110, a cylindrical material holding unit 120, a heating unit 130 (heating means), a fine wire forming unit 140, a temperature measuring unit 150, a rotating plate cleaning unit 160, and a fine wire collecting unit 170. Is provided.

  In the chamber 101, for example, argon gas is used as the atmospheric gas. The material supply unit 110 supplies the metal material M into the chamber 101. The material holding unit 120 holds the metal material M supplied from the material supply unit 110. The heating unit 130 forms a molten metal Ma (molten metal) by melting the upper end portion of the metal material M held by the material holding unit 120. The fine wire forming unit 140 uses the rotating plate 141 to form the fine metal wire F from the molten metal Ma. The temperature measurement unit 150 measures the temperature in the vicinity of the contact portion between the peripheral portion 141a of the rotating plate 141 and the molten metal Ma. The rotating plate cleaning unit 160 uses the scraper 161 (cleaning member) to remove deposits attached to the peripheral portion 141a of the rotating plate 141. The fine wire collection unit 170 collects the fine metal wire F formed by the fine wire forming unit 140. Hereinafter, although each part (mainly the rotating plate 141 which is the characteristics of this invention) of the metal fine wire manufacturing apparatus 100 is demonstrated, it cannot be overemphasized that various deformation | transformation are possible for those parts within the scope of the present invention.

  The material supply unit 110 is provided at the bottom of the chamber 101, for example, and moves the metal material M toward the arrow B direction (FIG. 1) at a predetermined speed and supplies the metal material M to the material holding unit 120. The material holding unit 120 is a ceramic nozzle provided on the lower side of the rotating plate 141 between the material supply unit 110 and the thin wire forming unit 140. The material holding unit 120 has a function of preventing the metal material M from moving in the radial direction and a guide function of smoothly moving the metal material M to the material forming unit 140. The heating unit 130 is a high-frequency induction coil that is provided around the upper end of the metal material M in the material holding unit 120 and forms the molten metal Ma by melting the upper end of the metal material M.

  The thin wire forming unit 140 includes a rotating plate 141 that contacts the molten metal Ma, a rotating shaft 142 provided in the center hole 141B of the rotating plate 141, and a rotation drive mechanism (not shown) that rotationally drives the rotating shaft 142. ing.

  The rotating plate 141 is made of, for example, copper or a copper alloy having a high thermal conductivity, and has a circular shape. A peripheral portion 141 a having a V-shaped tip is formed on the outer peripheral portion of the rotating plate 141. A central hole 141B through which the rotary shaft 142 is provided is formed at the center of the rotary plate. An annular groove 141 </ b> C is formed on the surface of the rotating plate 141. The groove 141C constitutes an uneven part as a temperature control means. In such a rotating plate 141, the heat dissipation is improved by increasing the surface area, and therefore, the temperature increase of the rotating plate 141 can be suppressed.

  When forming such an uneven portion, considering the manufacturing conditions of the fine metal wire, by appropriately designing the shape of the uneven portion, the formation position of the uneven portion, the ratio of the surface area to the volume of the rotating plate 141, etc. The temperature of the rotating plate can be set below a predetermined temperature. In particular, the temperature increase of the rotating plate 141 can be effectively suppressed by setting the ratio of the surface area to the volume of the rotating plate 141 (= surface area / volume) to 4 or more. In this case, it is preferable to set the temperature of the rotating plate 141 to 120 ° C. or less. Moreover, when using a natural fiber or a synthetic fiber as a material of the following scraper 161 of the rotating plate cleaning part 160, it is more suitable to set the temperature of the rotating plate 141 to 20-100 degrees C or less. In this case, continuous production of fine metal wires can be performed for the normal longest production time (for example, 9 hours) during mass production.

  In such a thin wire forming section 140, the molten metal Ma is rapidly cooled by contact between the peripheral edge portion 141a of the rotating plate 141 and the molten metal Ma, and the cooled molten metal Ma is moved in the direction of arrow A (FIG. 1) of the rotating plate 141. Is sent in the tangential direction of the peripheral edge portion 141a, thereby forming a fine metal wire F having a uniform wire diameter.

  The temperature measurement unit 150 includes a radiation thermometer 151 that measures the temperature in the vicinity of the contact portion between the peripheral portion 141a of the rotating plate 141 and the molten metal Ma. The radiation thermometer 151 is provided on the side of the contact portion outside the chamber 101. The radiation thermometer 151 measures the temperature in the vicinity of the contact portion in a non-contact manner through the opening 101A of the chamber 101 and the glass window 152 covering the opening 101A.

  The rotating plate cleaning unit 160 includes, for example, a scraper 161 that removes adhered matter attached to the peripheral portion 141a of the rotating plate 141, and a rotation drive mechanism 162 that rotates the scraper 161. Yes. The scraper 161 is made of synthetic fiber or natural fiber, for example. The fine wire collection unit 170 collects the fine metal wire F sent by the rotating plate 141 in the tangential direction of the peripheral portion 141a.

(1-2) Operation of Embodiment Next, the operation of the metal fine wire manufacturing apparatus 100 will be described mainly with reference to FIGS. First, the material supply unit 110 continuously moves the metal material M in the direction of arrow B and supplies it to the material holding unit 120. The heating unit 130 melts the metal material M protruding from the upper end of the material holding unit 120 toward the fine wire forming unit 140 by heating to form a molten metal Ma (molten metal). Next, the molten metal Ma comes into contact with the peripheral portion 141a of the rotating plate 141 rotating in the arrow A direction, is sent out in the tangential direction of the peripheral portion 141a, and is rapidly cooled. The thin metal wire F having a uniform wire diameter formed thereby is collected by the thin wire collecting unit 170 located in the tangential direction of the peripheral portion 141a. At this time, the adhering matter adhering to the peripheral portion 141 a of the rotating plate 141 is removed by the scraper 161 of the rotating plate cleaning unit 160.

  Here, in the first embodiment, in consideration of the manufacturing condition of the fine metal wire, the shape of the uneven portion configured as the temperature control means by the groove 141C of the rotating plate 141, the formation position of the uneven portion, the surface area of the rotating plate 141 By appropriately designing the ratio between the volume and the volume, the temperature of the rotating plate 141 is set to a predetermined temperature or lower during the production of the thin metal wire F as described above.

  As described above, in the first embodiment, the wettability of the rotating plate 141 with respect to the molten metal Ma is within a desired range by controlling the temperature of the rotating plate 141 with the uneven portion configured as the temperature control means by the groove 141C. Since it can be set, adhesion of the molten metal Ma to the rotating plate 141 and forward dripping of the molten metal Ma from the rotating plate 141 can be prevented. Therefore, the thin metal wire F can be manufactured stably for a long time, and the manufacturing yield can be improved.

  In particular, as the temperature control means, a simple configuration of a concavo-convex portion constituted by the groove 141C of the rotating plate 141 is used, so that the cost of the apparatus can be reduced. In particular, the temperature increase of the rotating plate 141 can be effectively suppressed by setting the ratio of the surface area to the volume of the rotating plate 141 (= surface area / volume) to 4 or more. When forming the concavo-convex part as described above, by considering the manufacturing conditions of the fine metal wire, by appropriately designing the shape of the concavo-convex part, the formation position of the concavo-convex part, the ratio of the surface area to the volume of the rotating plate 141, etc. The temperature of the rotating plate can be set below a predetermined temperature.

  In the first embodiment, various rotating plates can be used in place of the rotating plate 141 as the rotating plate having the grooves constituting the concavo-convex portion. FIG. 3 illustrates a configuration of a rotating plate 180 that is a modified example of the rotating plate according to the first embodiment. The rotating plate 180 is a rotating plate in which grooves 180A extending radially from the central portion to the outer peripheral portion of the surface are formed, and the concavo-convex portion facing the direction intersecting the rotating direction of the rotating plate 180 Is constituted by the groove 180A. In such a rotating plate 180, the heat dissipation is improved by increasing the surface area, and therefore, the temperature increase of the rotating plate 180 can be suppressed. Therefore, the same actions and effects as those of the rotating plate 141 can be obtained.

  In addition, in this case, since the concavo-convex portion formed by the groove 180A is oriented in a direction intersecting the rotation direction of the rotating plate 180, the atmospheric gas in the vicinity of the rotating plate 180 is agitated, and the stagnation of the high-temperature atmospheric gas there Is prevented. Thereby, the low temperature atmosphere gas is always supplied (sprayed) to the surface of the rotating plate 180 and the heat dissipation is improved, so that the temperature increase of the rotating plate 180 can be further suppressed. In this case, fins 190A provided on the rotating plate 190 shown in FIG. 4 or a fan (not shown) that rotates in the chamber 101 may be used as means for stirring the atmospheric gas.

(2) Second Embodiment In the second embodiment, as a temperature control means, a through hole is formed instead of forming an uneven portion on the rotating plate as in the first embodiment. In the following embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description of the configuration and operation is omitted.

  FIG. 5 shows a configuration of a rotating plate 200 according to the second embodiment of the present invention. In the rotating plate 200, a through hole 200A is formed around the center hole 141B. In such a rotating plate 200, since the heat capacity is reduced by the through hole 200A, the rotating plate 200 is easily cooled. Further, the atmospheric gas in the vicinity of the rotating plate 200 is agitated by the through-hole 200A, and the stagnation of the high-temperature atmospheric gas there is prevented. Thereby, the low temperature atmosphere gas is always supplied (sprayed) to the surface of the rotating plate 200 and the heat dissipation is improved, so that the temperature increase of the rotating plate 200 can be suppressed.

  As described above, in the second embodiment, the same effects as in the first embodiment can be obtained. In particular, the temperature increase of the rotating plate 200 can be effectively suppressed by setting the volume opening ratio of the through hole 200A to the rotating plate 200 to be 30 to 70%. When forming the through-hole 200A as described above, the shape of the through-hole, the formation position of the through-hole, the volume opening ratio of the through-hole 200A with respect to the rotating plate 200, etc. are appropriately designed in consideration of the manufacturing conditions of the fine metal wires. Thus, the temperature of the rotating plate 200 can be set to a predetermined temperature or lower.

(3) Third Embodiment In the third embodiment, as a temperature control means, a temperature control unit using cooling water is used instead of forming an uneven portion on the rotating plate as in the first embodiment. 6A and 6B show a configuration of a temperature control unit 350 according to the third embodiment, in which FIG. 6A is a side sectional view and FIG. 6B is a partial enlarged side sectional view. FIG. 6 is a side sectional view corresponding to the direction perpendicular to the paper surface of the metal fine wire manufacturing apparatus 100 of FIG. 7 shows a basic configuration of the rotating plate 341 of the thin wire forming unit 340 of FIG. 6, (A) is a front view, and (B) is a sectional view taken along line 7B-7B of (A). The fine line forming part 340 is a part used instead of the fine line forming part 140 of the first embodiment, and the temperature control part 350 is a part including the temperature measuring part 150 of the first embodiment.

  The thin wire forming unit 340 rotates the rotating plate 341 that contacts the molten metal Ma, the rotating shaft 342 provided in the center hole 341B of the rotating plate 341, the bearing 343 that rotatably supports the rotating shaft 342, and the rotating shaft 342. It has a rotary drive mechanism (not shown) for driving.

  As shown in FIG. 7, the rotating plate 341 has a circular shape, and has a peripheral edge portion 341a having a V-shaped tip portion. The rotating plate 341 is made of copper or a copper alloy having high thermal conductivity, for example. The rotating shaft 342 has a rod-shaped main body portion 342A for rotating the rotating plate 341, a flange portion 342B formed integrally with the main body portion 342A, and a hollow portion 342C through which cooling water flows. In the main body 342 </ b> A, one end is connected to the center of the rotating plate 341 and the other end is disposed outside the chamber 101. The flange portion 342B is disposed on one surface of the rotating plate 341 on the chamber 101 side, and extends to the vicinity of the peripheral edge portion 341a on the one surface. The hollow portion 342C is formed in the main body portion 342A and the flange portion 342B.

  In such a thin wire forming section 340, the molten metal Ma is rapidly cooled by contact between the peripheral edge portion 341a of the rotating plate 341 and the molten metal Ma, and the cooled molten metal Ma is moved in the direction of arrow A (FIG. 1) of the rotating plate 341. Is sent in the tangential direction of the peripheral edge portion 341a to form a fine metal wire F having a uniform wire diameter.

  As shown in FIG. 6, the temperature controller 350 includes a housing 351, a rotating shaft 352, a hollow part 352A, a bearing 353, a seal part 354, a radiation thermometer 151 (FIG. 1), and a cooling part (cooling means, not shown). )have. The housing 351 is provided outside the chamber 101. The rotating shaft 352 is provided in the housing 351 and is connected to the other end of the rotating shaft 342 of the rotating plate 341 by screwing. The bearing 353 supports the rotating shaft 352 in a freely rotatable manner. The hollow portion 352A is formed in the rotating shaft 352 and the seal portion 354, where cooling water flows. The seal portion 354 prevents cooling water from leaking. The radiation thermometer 151 is the same thermometer as in the first embodiment, and is provided in the chamber 101 as in the first embodiment. The cooling unit distributes the cooling water to the hollow portions 342C and 352A based on the measurement temperature of the radiation thermometer 151. In addition, when the temperature of the rotating plate 341 is low, for example, before starting heating, the cooling unit can also circulate hot water (fluid). In this case, when the temperature of the rotating plate 341 is low, such as before the start of heating, the rotating plate 341 may be directly heated using a heating means such as a heater.

  The hollow portion 352A is connected to the hollow portion 342C of the rotating shaft 342, and constitutes a flow path 356 together with the hollow portion 342C. The flow path 356 has a double tubular shape, the inner part thereof constitutes a water supply path 356A, and the outer part thereof constitutes a drainage path 356B. The seal portion 354 includes, for example, a seal member 354A, which is a carbon graphite or cemented carbide seal, a seal member 354B, which is a bronze or ceramic floating seal, and a seal member 354C of a Teflon (registered trademark) wedge or a bidon O-ring. Have.

  In such a temperature control unit 350, cooling water is supplied to the hollow portion 343 </ b> C at one end of the rotating shaft 342 adjacent to the rotating plate 341, and at this time, the cooling unit has a temperature measured by the radiation thermometer 151. Based on this, the flow rate, flow rate, temperature, and the like of the cooling water are controlled so that the peripheral edge portion 341a of the rotating plate 341 is held within a predetermined temperature range. In this case, it is preferable to set the temperature of the rotating plate 341 as in the first embodiment.

  As described above, in the third embodiment, the temperature control unit 350 controls the temperature of the rotating plate 341 so that the wettability of the rotating plate 341 with respect to the molten metal Ma can be set within a desired range. In the control, the same effect as in the first embodiment can be obtained.

  Hereinafter, embodiments of the present invention will be described in more detail with reference to specific examples. In the following Examples 1 and 2, the following experimental conditions are common. That is, the material of the metal material was SUS304, and Ar gas was used as the atmospheric gas in the chamber. The supply speed of the metal material was 1.0 kg / h, and the rotation speed of the rotating plate was 35 m / s. The rotating plate was made of tough pitch copper, and the common configuration of the rotating plate was formed with a hole in the center, the edge angle θ of the peripheral edge was 60 degrees, and the edge diameter t was 8 mm (see FIG. 7). The temperature of the rotating plate was measured with a radiation thermometer. The scraper material of the rotating plate cleaning unit was a fiber.

[Example 1]
Example 1 is an example of the first embodiment. In Example 1, the temperature control means consisting of uneven portions is used, and the shape, diameter D (see FIG. 7), volume, and surface area of the uneven portions of the rotating plate are changed as in experimental conditions 1 to 4 shown in Table 1. The thin metal wire was manufactured under each condition. In the comparative example, a rotating plate having the above-described common configuration not including the uneven portion of the first embodiment, the through hole of the second embodiment, the flange portion and the hollow portion of the third embodiment was used. The result is shown in FIG. FIG. 8 is a graph showing the relationship between the temperature of the rotating plate and the manufacturing time according to the first embodiment.

  As can be seen from the comparison between the experimental conditions 1 to 4 shown in FIG. 8 and the comparative example, when the concavo-convex portion is formed on the rotating plate, the increase in the surface of the rotating plate due to the concavo-convex portion suppresses the increase in the rotating plate temperature. It was confirmed. Therefore, it was found that the metal thin wire can be manufactured for a long time by forming the uneven portion on the rotating plate. Further, it was confirmed that when the ratio of the surface area to the volume (= surface area / volume) was 4 or more, the temperature of the rotating plate was saturated at 120 ° C. or less. Therefore, it was found that the ratio of the surface area to the volume (= surface area / volume) is preferably 4 or more.

  In addition, as can be seen from the comparison between the experimental conditions 1 and 2 and the experimental conditions 3 and 4, in the experimental conditions 3 and 4 in which the concavo-convex part intersects the rotation direction of the rotating plate, by the stirring of the atmospheric gas by the concavo-convex part, It was confirmed that the increase in the rotating plate temperature was suppressed more than the experimental conditions 1 and 2. Further, it was confirmed that the same effect can be obtained even if fins formed on the rotating plate as shown in FIG. 4 or a fan that rotates in the chamber is used as the stirring means for the atmospheric gas. Therefore, it was found that the fine metal wires can be manufactured for a long time by stirring the atmospheric gas.

[Example 2]
Example 2 is an example of the second embodiment. In Example 2, the temperature control means consisting of through-holes was used, and the metal was used under various conditions in which the diameter D (see FIG. 7), volume, and surface area of the rotating plate were changed as in Experimental Conditions 5-15 shown in Table 1. The result of manufacturing the fine wire is shown in FIG. FIG. 9 is a graph showing the relationship between the temperature of the rotating plate and the manufacturing time according to the second embodiment.

  As can be seen from the comparison between the experimental conditions 5 to 15 shown in FIG. 9 and the comparative example, when the through hole is formed in the rotating plate, the increase in the temperature of the rotating plate is suppressed by the decrease in the heat capacity due to the through hole and the stirring of the atmospheric gas. I was sure that. Further, even when the temperature of the rotating plate at the start of the production of the fine metal wire is 20 ° C. or lower, it is 20 ° C. or higher in about 10 minutes. In this case, heating may be performed in advance using a heating means such as a heater.

  In particular, under the experimental conditions 5, 6, and 9 to 15, it was confirmed that the temperature of the rotating plate was 120 ° C. or less when the production time was within 9 hours (9 hours was the longest production time during normal mass production). Further, in the case of the experimental conditions 4 to 11, 13, and 15 where the volume of the rotating plate is small, the rotating plate is saturated at 120 ° C. or less, and the rotating plate when the manufacturing time is 9 hours even in the case of the experimental condition 14 where the volume of the rotating plate is large. The temperature became 120 ° C. or lower. Therefore, it was found that the volume opening ratio of the through holes is preferably 30 to 70%.

[Example 3]
Example 3 is an example of the third embodiment. In Example 3, the temperature control part using the cooling water was used, and the metal fine wire was manufactured while performing temperature control at each set temperature of the rotating plate as in the experimental conditions 16 to 27 shown in Table 2. The result is shown in FIG. FIG. 10 is a graph showing the relationship between the temperature, the manufacturing yield, and the manufacturing time of the rotating plate according to the third embodiment. Note that the symbol ↑ attached to the symbol □ in the drawing indicates that the manufacturing can be continued at the manufacturing time corresponding to the symbol □, but the manufacturing is stopped there.

  As in the experimental conditions 26 and 27 shown in FIG. 10, when the set temperature of the rotating plate exceeds 120 ° C., the wettability of the rotating plate with respect to the molten metal is too good, so that the production of the fine metal wire becomes unstable and the manufacturing yield is increased. Declined. On the other hand, when the set temperature of the rotating plate was set to 120 ° C. or less within the range of the present invention as in the experimental conditions 16 to 25, it was confirmed that the production yield was increased. Thus, it has been found that the manufacturing yield of the fine metal wires can be improved by controlling the set temperature of the rotating plate to 120 ° C. or less within the range of the present invention in the temperature control using the cooling water.

  Further, when the set temperature was less than 20 ° C. as in the experimental condition 16, the wettability of the metal material with respect to the molten metal was too bad, so that drooping frequently occurred and the production yield was lowered. On the other hand, when the set temperature exceeded 100 ° C. as in experimental conditions 24 to 27, continuous production for 9 hours was impossible due to insufficient heat resistance of the fiber that is the material of the scraper. On the other hand, when setting temperature was 20 to 100 degreeC like experiment conditions 17-23, it confirmed that continuous manufacture for 9 hours or more was possible. Therefore, it was found that it is more preferable to set the set temperature of the rotating plate to 20 to 100 ° C. within the range of the present invention in the temperature control using the cooling water.

It is a sectional side view showing the outline of the whole structure of the metal fine wire manufacturing apparatus concerning 1st Embodiment of this invention. It is a fragmentary sectional view showing an example of composition of a rotating board concerning a 1st embodiment of the present invention. The other structure of the rotating plate which concerns on 1st Embodiment of this invention is represented, (A) is a front view, (B) is a 3B-3B sectional view taken on the line. The other structure of the rotating plate which concerns on 1st Embodiment of this invention is represented, (A) is a front view, (B) is a side view. It is a front view showing an example of composition of a rotating board concerning a 2nd embodiment of the present invention. The structure of the temperature control part in the paper surface perpendicular | vertical direction of the metal fine wire manufacturing apparatus which concerns on 3rd Embodiment of this invention is represented, (A) is a sectional side view, (B) is a partial expanded sectional side view. The common structure of the rotating plate used by the 1st-3rd embodiment of this invention is represented, (A) is a front view, (B) is the 7B-7B sectional view taken on the line of (A). It is a graph showing the relationship between the temperature of the rotating plate which concerns on Example 1 of this invention, and manufacturing time. It is a graph showing the relationship between the temperature of the rotating plate which concerns on Example 2 of this invention, and manufacturing time. It is a graph showing the relationship of the temperature of the rotary plate which concerns on Example 3 of this invention, a manufacturing yield, and manufacturing time. The schematic structure of the conventional metal fine wire manufacturing apparatus is represented, (A) is a sectional side view, (B) is sectional drawing of the 11B-11B line.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 100 ... Metal fiber manufacturing apparatus, 130 ... Heating part (heating means), 141, 180, 190, 200, 341 ... Rotating plate, 141a, 341a ... Peripheral part, 142, 342 ... Rotating shaft, 161 ... Scraper (cleaning member) , 140C, 180A ... groove (uneven portion, temperature control means), 190A ... fin (uneven portion, temperature control means), 200A ... through hole (through hole, temperature control means), 342A ... main body portion, 342B ... flange portion, 342C, 352A ... hollow part, 350 ... temperature control part (temperature control means), M ... metal material, Ma ... molten metal, F ... fine metal wire

Claims (9)

Heating means for forming a molten metal by melting the end of the metal material;
A rotating plate having a peripheral part, cooling the molten metal by contact between the peripheral part and the molten metal, and sending the cooled molten metal by rotation to form a fine metal wire;
An apparatus for producing a fine metal wire, comprising temperature control means for controlling the temperature of the rotating plate.   The metal wire manufacturing apparatus according to claim 1, wherein the temperature of the rotating plate is set to 120 ° C or less by the temperature control means. It is made of natural fiber or synthetic fiber, and includes a cleaning member that removes deposits on the peripheral edge of the rotating plate,
The metal wire manufacturing apparatus according to claim 1, wherein the temperature of the rotating plate is set to 20 to 100 ° C. or less by the temperature control means.   The said temperature control means is an uneven | corrugated | grooved part formed in parts other than the said peripheral part in the said rotating plate, The metal fine wire manufacturing apparatus in any one of Claims 1-3 characterized by the above-mentioned.   The said uneven | corrugated | grooved part is suitable for the direction which cross | intersects with respect to the rotation direction of the said rotating plate, The metal fine wire manufacturing apparatus of Claim 4 characterized by the above-mentioned.   The said temperature control means is a through-hole formed in the plate | board thickness direction of the said rotating plate, The metal fine wire manufacturing apparatus in any one of Claims 1-5 characterized by the above-mentioned.   The metal wire manufacturing apparatus according to claim 6, wherein a volume opening ratio of the through hole with respect to the rotating plate is 30 to 70%. The rotating shaft of the rotating plate includes a main body for rotating the rotating plate, a flange formed integrally with the main body and extending to the vicinity of the peripheral edge on at least one surface of the rotating plate. Have
The said temperature control means has the hollow part formed in the said main-body part and the said flange part of the said rotating shaft, and the cooling means which distribute | circulates a fluid to the said hollow part, The any one of Claims 1-7 characterized by the above-mentioned. The metal thin wire manufacturing apparatus according to claim. The said rotating plate consists of copper or a copper alloy, The metal fine wire manufacturing apparatus in any one of Claims 1-8 characterized by the above-mentioned.

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