JP2012089358A - Sorted collection method of abandoned extra fine cables, and drying apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sorted collection method of abandoned extra fine cables, and a drying apparatus, capable of securely and simply drying extra fine copper cables with a low-cost configuration irrespective of the magnitude of a process amount, and capable of suppressing an environmental load and energy consumption.SOLUTION: The sorted collection method of abandoned extra fine cables includes: a shearing step A for separating the abandoned extra fine cables into coating materials and extra fine copper cables L; a separation step B for separating the mixture of the coating materials and the extra fine copper cables L into the coating materials and the extra fine copper cables L, respectively; and a drying step C for drying the extra fine copper cable L. The drying step C of the extra fine copper cables L includes: a drying preparation step C1 for disentangling the extra fine copper cables L thrown into a trough 11 of a drying apparatus 10; a first drying step C2 for dehydrating the disentangled extra fine copper cables L using a vacuum apparatus 12; and a second drying step C3 for heating and drying the dehydrated extra fine copper cables L.

Description

  The present invention relates to a method for separating and collecting ultrafine waste electric wires and a drying apparatus.

  Conventionally, many proposals have been made on apparatuses and methods for recovering one or both of a copper wire and a covering material from waste electric wires. In recent years, the amount of recovered products has increased with the increasing awareness of recycling. Among the waste wires, for example, thin or ultra-fine copper wires that have not been recovered for various reasons such as technical and profitability. The ultra-thin waste wires composed of

  Furthermore, it is required to improve the quality of the recovery process. For example, the copper after recovery such as increasing the purity of separation or stricter conditions regarding surface alteration due to moisture remaining on the copper wire surface. Attention has also come to pay attention to the quality of wires and coatings.

  In order to separate and collect waste wires into copper wires and coating materials, first, the copper wires and the coating materials are separated by a shearing machine. However, in this state, the separated copper wires and the covering material are in a collective state (mixed state). Then, a copper wire and a coating | covering material are fractionated next using the specific gravity difference of both. For this separation method, two methods, a dry method and a wet method, are used.

  The dry method is a method that uses wind power to separate copper wire and coating material, and does not use water like the wet method, so the drying process is unnecessary, the finish of the copper wire is clean, etc. There are benefits. On the other hand, since the wind power is used, when the copper wire is light or thin, the copper wire is blown with the coating material, the copper wire recovery rate (purity of separation) is deteriorated, the reuse destination is limited, etc. There are disadvantages.

  On the other hand, the wet method uses water having a specific gravity of 1 to separate the copper wire and the coating material. By using water, a copper wire with a large specific gravity sinks and a coating material with a low specific gravity floats. Therefore, there exists an advantage that the purity of both classification becomes high. However, since the copper wire once sinks and gets wet, there is a demerit that must be dried again. In the drying process of the copper wire, a rotary kiln is used in many cases, and the wetted copper wire is dried by radiant heat at the time of separation from the coating material, or dried by blowing hot air on the copper wire. A method for separating and recovering resources using this wet method is presented in Patent Document 1 below.

  In addition, after separating the copper wire and the covering material, before the drying step using the rotary kiln, for example, by incorporating a dehydration step using a centrifuge, a method aiming for more reliable drying of the copper wire is also adopted. ing.

JP-A-3-263716

  However, in the drying method using the drying device disclosed in the invention of Patent Document 1 described above, there are cases where the copper wire cannot be sufficiently dried depending on the type of the copper wire. For example, in the case of a thin copper wire and an ultrafine copper wire having a small diameter, they are entangled in a dumpling shape as the conveyance process to the rotary kiln and the rotary kiln rotate. For this reason, the water contained therein cannot be completely dried.

  In addition, when a centrifuge is used, the copper wire can be sufficiently dehydrated if appropriate rotation control can be performed according to the type of copper wire, but there are various types of copper wires mixed There are some cases where it cannot be dried.

  Furthermore, when using a rotary kiln or using a centrifuge, the processing capacity of each is determined, so to increase the processing capacity of fractional collection in order to perform a large amount of fractional collection This can be done by increasing the size of the device or increasing the number of installed devices. However, from the viewpoint of securing the installation location and cost, or in the case of a rotary kiln, especially the environment of the installation location becomes high temperature, it is not always possible to take sufficient measures, and as a result, separation according to the processing amount It cannot be recovered.

  The present invention has been made to solve the above-mentioned problems, and the object of the present invention is to make it possible to reliably dry an ultrafine copper wire with a simple and inexpensive configuration regardless of the amount of processing. It is an object of the present invention to provide a method for separating and collecting ultra-fine waste electric wires and a drying device that can suppress environmental load and energy consumption.

  A first feature according to the embodiment of the present invention is that a shearing process for separating an extra fine waste electric wire into a covering material and an extra fine copper wire, and a mixed covering material and an extra fine copper wire, respectively, In a method for separating and recovering ultrafine waste electric wires comprising a separation step for separating the fine copper wire and a drying step for drying the ultrafine copper wire, the drying step for the ultrafine copper wire is a drying preparation step for loosening the ultrafine copper wire put in the trough of the drying device And a first drying step of dehydrating the loosened ultrafine copper wire using a vacuum device, and a second drying step of heating and drying the dehydrated ultrafine copper wire.

  The second feature according to the embodiment of the present invention is that, in the drying apparatus, each of the drying preparation process, the first drying process, and the second drying process is performed on the ultrafine copper wires separated from the ultrafine waste electric wires to be dried. A trough that sequentially proceeds according to the process, a vacuum device for dehydrating the ultrafine copper wire installed in the area where the first drying process is performed, and an ultrafine copper wire installed in the area where the second drying process is performed A heating device for drying, a drive mechanism for vibrating the trough, and a control device for controlling the drive mechanism are provided.

  According to the present invention, it is possible to reliably dry an ultrafine copper wire with a simple and inexpensive configuration regardless of the amount of processing, and to separate and recover an ultrafine waste electric wire that can suppress environmental load and energy consumption. A method and drying apparatus can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is a general view which shows the apparatus structure utilized at each process of the extra fine waste electric wire separation collection method which concerns on embodiment of this invention. It is sectional drawing which cut | disconnects and shows the drying apparatus which concerns on embodiment of this invention from the front. It is a top view which shows the structure of the drying apparatus which concerns on embodiment of this invention. FIG. 4 is a partial cross-sectional view taken along line XX of the drying device according to the embodiment of the present invention cut along line XX shown in FIG. 3. It is a flowchart which shows the flow of the drying process in the ultra-fine waste electric wire separation collection method which concerns on embodiment of this invention. It is explanatory drawing which shows the state of the ultrafine copper wire in each process of the drying process which concerns on embodiment of this invention. It is explanatory drawing which shows the state of the ultrafine copper wire in the drying preparation process of the drying process which concerns on embodiment of this invention. It is explanatory drawing which shows the state of the ultrafine copper wire in the 1st drying process of the drying process which concerns on embodiment of this invention. It is explanatory drawing which shows the state of the ultra-fine copper wire in the 2nd drying process of the drying process which concerns on embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an overall view showing an apparatus configuration used in each step of a method for separating and collecting extra fine waste electric wires according to an embodiment of the present invention. The separation and collection of extra fine waste electric wires is largely divided into a shearing step A, a separation step B, and a drying step C. The present invention is characterized by the drying step (drying method) among the ultra-thin waste electric wire separation and recovery methods. For convenience of understanding, the shearing step A and the separation step B, which are the first steps of the drying step C, will be briefly described below. Will be described.

  In the embodiment of the present invention, the copper wire that is separated and collected as the extra-fine waste electric wire is a copper wire that is used for a wire harness used for an automobile, a cord for home appliances, or the like. These copper wires are thin or very thin, but are hereinafter collectively referred to as “ultrafine copper wires”.

  In the shearing process A, the wire harness or the like is sheared using the shearing machine 1. For example, a connector or the like is connected to the wire harness or the like, but the connector or the like is removed in advance. As a result, the wire harness or the like becomes a so-called extra-fine waste electric wire that is no longer used in the form of a string. Or, if each connector is processed, it becomes copper mixed with brass.

  When the cut surface of the waste wire is viewed, the periphery of the copper wire is covered with a covering material. When the copper wire has a certain thickness, the copper wire is composed of only one. On the other hand, there are many cases where a large number of ultrafine copper wires are combined and the periphery thereof is covered with a coated wire. Each of the ultrafine copper wires has a diameter of, for example, around 0.2φ, and further, when such an ultrafine copper wire is sheared by the shearing machine 1, it becomes very short, so that it is lightweight. Therefore, when such a fine copper wire is separated from the covering material, if a dry method is adopted, 10 to 20% of the copper content is mixed into the covering side. In this state, the copper recovery rate is remarkably lowered, and the reuse destination of the coating material mixed with copper is limited to a very narrow range. Therefore, the wet method is adopted instead of the dry method.

  The shearing machine 1 not only simply cuts the wire harness or the like, but also separates the ultrafine copper wire from the covering material. Accordingly, when the wire harness or the like passes through the shearing machine 1, it is cut very short and the ultrafine copper wire and the covering material are separated (the ultrafine copper wire is peeled off from the covering material). However, when passing through the shearing machine 1, both the ultrafine copper wire and the covering material are mixed. In this state, the process proceeds to separation step B.

  The ultrafine copper wire and the composite material that are mixed are sent to the hopper 3 through the pneumatic pipe 2. In the separation step B, the extra fine copper wire and the covering material that are mixed are separated separately using the wet specific gravity difference separator 4. The wet specific gravity difference separator 4 flows water and separates both using the specific gravity difference between the ultrafine copper wire and the coating material.

  The ultrafine copper wire and the material to be mixed that have been mixed are sent to the upper part of the hopper 3 and are sequentially deposited inside the hopper 3. Since the lower part of the hopper 3 can be opened, the ultrafine copper wire and the covering material mixed according to the processing capacity of the wet specific gravity difference separator 4 are supplied to the wet specific gravity difference separator 4. . At this time, water is also supplied from the water supply unit 5 to the wet specific gravity difference separator 4.

  As shown in FIG. 1, the wet specific gravity difference separator 4 is provided with an inclined ridge 4 a. The ultrafine copper wire, the composite material, and the water that are mixed in the ridge 4a are supplied, and when the ridge 4a vibrates, the ultrafine copper wire and the covering material are gradually separated by the difference in specific gravity between them. That is, the ultrafine copper wire sinks at the bottom of the basket 4a because it has a specific gravity greater than that of water. On the other hand, since the covering material is mostly made of plastic, it floats in water because its specific gravity is smaller than that of water.

  Therefore, the covering material is discharged from one opening 4b of the ridge 4a in combination with the inclination of the ridge 4a and the flow of water. The discharged covering material is collected in the collection box 4c.

  Although the extra fine copper wire sinks to the bottom of the ridge 4a, the ridge 4a is vibrated by a driving device (not shown), so that it gradually moves to the other opening 4d side and is finally supplied from the other opening 4d to the drying device 10. Is done. In this state, since the ultrafine copper wire is wet, it needs to be surely dried. For this purpose, the drying apparatus 10 is used. As shown in FIG. 1, the ultrafine copper wire containing moisture is supplied from the wet specific gravity difference separator 4 to the trough 11 of the drying apparatus 10. In FIG. 1, a surface on which an ultrafine copper wire is supplied and moved is indicated by a broken line.

  In the drying step C, the drying device 10 is used. The drying process C is divided into three processes: a drying preparation process C1, a first drying process C2, and a second drying process C3. As the drying process C proceeds, the ultrafine copper wire is dried while gradually moving on the trough 11, and when it is recovered from the drying device 10, it is in a dry state satisfying predetermined conditions.

  The drying preparation step C1 is a step of loosening the ultrafine copper wire that has become entangled in the dumpling shape or other shapes in the separation step B. By loosening the entanglement of the ultrafine copper wire in this process, the ultrafine copper wire can be reliably dried in the future drying process. This drying preparation process C1 is performed in the area C1 on the trough 11 of the drying apparatus 10 shown in FIGS.

  Next is the first drying step C2. The first drying step C2 is a step of increasing the efficiency of drying the copper wire by dehydrating the tangled copper wire. A vacuum device 12 is used for dehydration. The vacuum device 12 is fixed to the lower portion of the trough 11 and dehydrates downward from the ultrafine copper wire on the trough 11. This first drying step C2 is performed in the region C2 on the trough 11 of the drying apparatus 10 shown in FIGS.

  In the second drying step C3, the ultrafine copper wire from which the rough water has been removed by dehydration using the vacuum device 12 is further evaporated and the water film remaining on the surface of the ultrafine copper wire is evaporated and dried using the heating device 13. It is a process. The heating device 13 is a flat heating device, and is opposite to a surface 11a (hereinafter, this surface is referred to as “surface 11a”) with which the ultrafine copper wire on the trough 11 is in contact with the opposite surface 11b (hereinafter referred to as “the opposite surface” It is installed on the rear surface 11b ". The shape and installation position of the heating device 13 are indicated by broken lines in FIG. This second drying step C3 is performed in the region C3 on the trough 11 of the drying apparatus 10 shown in FIGS.

  The drying device 10 is a so-called vibration conveyor, and vibrates by driving of a driving device 14 connected to the back side of the trough 11. The driving device 14 is driven based on control from the control device 15. The trough 11 and the driving device 14 are fixed on the pedestal 16.

  FIG. 2 is a cross-sectional view of the drying device 10 according to the embodiment of the present invention cut from the front. In FIG. 2, in order to clarify the configuration of the drying apparatus 10, some apparatuses are illustrated using virtual lines or the like. FIG. 3 is a plan view showing the configuration of the drying apparatus 10 according to the embodiment of the present invention. That is, FIG. 3 shows the trough 11 as viewed from the top of the drying apparatus 10. FIG. 4 is a partial cross-sectional view taken along the line XX of the drying apparatus 10 according to the embodiment of the present invention cut along the line XX shown in FIG. In FIG. 4, the pedestal 16 is omitted.

  The trough 11 holds the ultrafine copper wire that is in the drying step C and proceeds sequentially. However, since the drying apparatus 10 is a vibrating conveyor as described above, the ultrafine copper wire on the surface 11a of the trough 11 is dissipated upward from the surface 11a of the trough 11, and will land on the surface 11a as will be described later. Repeat to do. The ultra-fine copper wire gradually moves on the trough 11 while moving in this manner from the region (region C1) of the drying preparation step C1 shown in FIG. 2 or 3 to the region of the second drying step C3 (region C3). Will move towards.

  As shown in the cross-sectional view of FIG. 2 and the cross-sectional view of FIG. 4, the trough 11 is composed of a surface 11 a on which ultrafine copper wire is held (contacted) and both walls 11 c. Both walls 11c of the trough 11 prevent the ultrafine copper wire from jumping out of the trough 11 from the surface 11a when the ultrafine copper wire moves as shown in FIG.

  On the other hand, the structure of the surface 11a with which the ultrafine copper wire contacts is different for each drying step C in the trough 11. That is, the mesh M is formed on the surface 11a in the C1 region and the C2 region corresponding to the drying preparation step C1 and the first drying step C2. In FIG. 3, the meshes M formed in the C1 region and the C2 region are indicated by shading. The mesh M is formed by weaving fine metal wires such as stainless steel, for example. The reason why the surface 11a of the trough 11 is the mesh M is that in the region corresponding to the drying preparation step C1 and the first drying step C2, the fine copper wire supplied from the wet specific gravity separator 4 is loosened and the fine copper wire is efficiently used. This is to dehydrate the moisture clinging to the inside using the vacuum device 12.

  Further, particularly in the embodiment of the present invention, the mesh M is tatami-woven so that the surface thereof is as smooth as the surface of the tatami mat. This is to prevent the ultrafine copper wire moving on the surface 11a of the trough during the drying process C from being caught on the mesh M. In the C1 region and the C2 region, for example, a mesh M formed in a tatami weave is incorporated and fixed in a through hole formed by cutting out the surface 11a of the trough 11. In that case, it fixes so that a clearance gap and a level | step difference may not arise between the edge part of the mesh M, and a through-hole.

  On the other hand, the surface 11a of the trough 11 in the region of the second drying step C3 is a flat metal surface S. As will be described later, in this second drying step C3, the ultrafine copper wire is heated and dried by the heating device 13, and therefore the trough 11 is placed on the metal surface in order to efficiently conduct the heat of the heating device 13 to the ultrafine copper wire. S and mesh M are not adopted.

  It should be noted that various methods may be employed for the method of creating the surface 11a using the mesh M in the C1 region and the C2 region, or the position and method of providing the heating device 13 for heating the ultrafine copper wire in the C3 region. Is possible and is not limited to the method described above.

  A large amount of water is supplied to the C1 region of the trough 11 together with the ultrafine copper wire from the other opening 4d of the wet specific gravity separator 4. Therefore, the mesh M in the C1 region contains a large amount of water. However, in the C1 region, since the drying preparation step C1 for loosening the entangled ultrafine copper wire is performed as described above, a special device for dehydrating or drying the ultrafine copper wire is not particularly provided. When the drying apparatus 10 vibrates, there is a possibility that water passes from the front surface 11 a of the mesh M toward the back surface 11 b and is scattered under the trough 11. Therefore, in the drying apparatus 10, a trough 17 is provided at the lower part of the C1 region of the trough 11, and water accumulated in the mesh M is collected and allowed to flow to a predetermined position.

  A vacuum device 12 is installed in the C2 region of the trough 11 below the trough 11. The vacuum device 12 sucks the moisture contained in the ultrafine copper wire and the moisture present on the mesh M by vacuum, and dehydrates the moisture sent from the wet specific gravity separator 4 in the C2 region. The vacuum device 12 is installed so that the suction port is in contact with the lower part of the mesh M fixed in the C2 region. In the embodiment of the present invention, the vacuum device 12 is installed so that the suction port is orthogonal to the traveling direction of the ultrafine copper wire, that is, opens across the entire width of the trough 11 (shown in FIG. 3). C2 area). By installing the suction port at such a position, the ultrafine copper wire passing through the C2 region is dehydrated by the vacuum device 12 without leakage.

  In the drying apparatus 10 shown in FIG. 2 or FIG. 3, three vacuum apparatuses 12 are installed in the C2 region. However, how many vacuum devices 12 are installed in the C2 region is arbitrary. Further, when a plurality of vacuum devices 12 are installed, for example, the vacuum device 12 installed at the position closest to the C1 region has a low degree of vacuum, while the vacuum device 12 installed at the position closest to the C3 region. It is also possible to change the suction force for each vacuum device 12, such as suction at a high degree of vacuum. Furthermore, it is also possible to install the vacuum device 12 so as to be movable in the C2 region.

  A heating device 13 is installed in the C3 region of the trough 11. The heating device 13 in the embodiment of the present invention has a planar shape, and is fixed to the back surface 11b of the trough 11 using, for example, an adhesive having excellent heat resistance. In FIGS. 2 and 3, four heating devices 13 are provided in the C3 region, but the number of heating devices 13 installed in the C3 region is not limited. Further, the shape of the heating device 13 may be any shape as long as the surface 11a in the C3 region can be heated.

  The trough 11 is connected to the driving device 14 at a substantially central portion on the back surface. In order to clarify the structure of the driving device 14, motors and driven wheels that are not originally shown in the sectional view of the drying device 10 are also shown in FIG. 2.

  The cam mechanism 14 a is connected to a connector 14 b that is fixed to the trough 11. The shaft cores of the cam mechanism 14a and the driven wheel 14c are eccentric. Both eccentricity amounts can be adjusted. The driven wheel 14c is connected to the motor 14e by a belt 14d. Accordingly, when the motor 14e rotates, the driven wheel 14c and the cam mechanism 14a also rotate, and the trough 11 moves (vibrates) in the horizontal direction and the vertical direction. With this movement, the copper wire moves on the surface 11a from the C1 region toward the C3 region.

  The control device 15 is connected to the motor 14e, and drives the drive device 14 in accordance with a drive program optimal for the type of copper wire to be dried. In the embodiment of the present invention, the control device 15 is installed on the pedestal 16 of the drying device 10, but the control device 15 is provided separately from the drying device 10 in a place different from the drying device 10. It may be done.

  The pedestal 16 supports the drying device 10 such as the trough 11 and the driving device 14. In the embodiment of the present invention, the drive device 14 and the control device 15 are installed in the middle stage of the pedestal 16. The trough 11 is installed in the uppermost stage via a movable tool 19 movably connected to a support tool 18 fixed to the upper stage of the pedestal 16. As is apparent from the plan view of FIG. 3, three support tools 18 are provided on both sides of the trough 11 in the width direction so as to sandwich the trough 11. Both ends of the movable tool 19 are connected to the trough 11 and the support tool 18, respectively, and the trough 11 is moved (vibrated) in the horizontal direction and the vertical direction according to the drive of the cam mechanism 14a.

  Further, the pedestal 16 adjusts the trough 11 and the drive device 14 around the pin 20 by adjusting the fixture 16d for fixing the beam 16a on which the drive device 14 and the like are installed and the legs 16b and 16c of the pedestal 16. It is possible to tilt. The reason why the trough 11 can be inclined is to adjust the angle and height of the copper wire radiating according to the type of copper wire to be dried. When the trough 11 is inclined, the copper wire moves so as to increase the inclination on the surface 11a.

  Next, the flowchart shown in FIG. 5 and an explanatory view showing the state of the ultrafine copper wire L on the trough surface 11a in each step of the drying preparation step C1, the first drying step C2, and the second drying step C3 (FIG. 6). The process of drying the ultrafine copper wire L will be described with reference to FIG. In the flowchart of FIG. 5, “extra fine copper wire” is simply represented as “copper wire”.

  First, the ultrafine copper wire L separated from the covering material using water from the wet specific gravity difference separator 4 is put into the drying apparatus 10 (ST1). As described above, in this state, the ultrafine copper wire L is in a state where a large amount of moisture is collected. Further, since the ultrafine copper wire L has a very small diameter, it may be separated from the coating material and form a tangled lump while moving the wet specific gravity difference separator 4. Therefore, in the drying preparation step C1, the ultrafine copper wire L entangled into a lump is loosened (ST2).

  Here, loosening the lump or entanglement before dehydration or drying by heating is a state where a large number of ultrafine copper wires L are entangled and densely packed, and moisture is held between each ultrafine copper wire L. This is because it is difficult to sufficiently dry the ultrafine copper wire L.

  Specifically, the lump or entanglement is loosened by causing the extra fine copper wire L to move as described below. FIG. 6 is an explanatory diagram showing a state of the ultrafine copper wire L in each step of the drying step C according to the embodiment of the present invention. Although the drying apparatus 10 is shown in FIG. 6, the wall 11 c of the trough 11 and the like are omitted in order to clearly show the state of the ultrafine copper wire L on the surface 11 a of the trough 11 and the movement.

  The ultrafine copper wire L introduced from the wet specific gravity difference separator 4 proceeds on the surface 11a of the trough 11 in the direction indicated by the arrow D in FIG. As the ultrafine copper wire L moves on the surface 11a, the drying preparation process C1, the first drying process C2, the second drying process C3, and the drying process C are sequentially performed.

  FIG. 7 is an explanatory diagram showing the state of the ultrafine copper wire L in the drying preparation step C1 of the drying step C according to the embodiment of the present invention. 7 to 9 are drawings showing the drying apparatus 10 (trough 11) as a plan view, as in FIG. 3, and for clarifying the state of the surface 11a and the ultrafine copper wire L thereon. Components other than the trough 11 to the surface 11a are not shown. The display of the mesh M is also omitted.

  The ultrafine copper wire L just introduced from the wet specific gravity difference separator 4 is often in a lump or entangled state as described above. As shown in FIG. 7, the ultrafine copper wire L that has become a lump or entanglement has moisture W inside, and the lump or entanglement of the ultrafine copper wire L exists in the puddle. It has become. Furthermore, even if the ultrafine copper wire L is not a lump or entanglement, its surface is wet and covered with a water film. In FIG. 7, the moisture W is also indicated by a black circle, and so much moisture W exists around the ultrafine copper wire L in the drying preparation step C1.

  The ultrafine copper wire L in such a state moves in the direction indicated by the arrow D. Here, since the drying device 10 is a vibration conveyor, when the driven wheel 14c rotates in the direction of arrow E, the cam mechanism 14a moves in the direction of arrow F, and the trough 11 moves in the horizontal direction as indicated by arrow G according to this movement. And move in both vertical directions. Note that the vacuum device 12 and the heating device 13 (not shown in FIG. 6) fixed to the trough 11 also move together with the trough 11.

  When the trough 11 constantly moves in the direction indicated by the arrow G, the ultrafine copper wire L on the surface 11a sequentially moves as indicated by the arrow H indicated by the broken line. That is, with the movement of the trough 11, the position of the surface 11a in contact with the ultrafine copper wire L is directed forward, that is, the direction indicated by the arrow D rather than the position of the surface 11a in contact with the ultrafine copper wire L at the present time. Prodigal. Although the radiated ultrafine copper wire L is once in the air, it falls quickly and lands on the surface 11a. Since this landing point is in the direction of the arrow D (forward in the moving direction) from the radiating point, the ultrafine copper wire L sequentially moves from the C1 region toward the C3 region as the trough 11 moves.

  The ultrafine copper wire L falls from the air and lands on the surface 11a, but a part or all of the lump or entanglement is unwound by the impact at this time. By repeating this radiation and landing, the ultrafine copper wire L in a lump or entanglement state is gradually unwound.

  In addition, in the actual drying preparation process C1, not all the lumps and entanglements of the ultrafine copper wire L that has undergone the process are necessarily unwound, and there can also be ultrafine copper wires L that maintain the lump and the entangled state. . Further, in the process of sequentially moving on the trough 11, there is no need for the extra fine copper wire L that becomes a new lump or entanglement in the drying process after the drying preparation process C1. This is due to the size and shape of the ultrafine copper wire L, and although the state where the lump and entanglement are loosened by the vibration of the trough 11 is maintained, a new lump and entanglement may occur. It is inevitable that the extra fine copper wire L moves on the trough 11 sequentially.

  However, before moving on to the first drying process C2 and the second drying process C3, the lump or entanglement of the ultrafine copper wire L is loosened as much as possible in the drying preparation process C1, and the state is maintained, thereby the drying process. The drying efficiency in the can be increased, and the ultrafine copper wire L can be dried more reliably. In particular, in the drying apparatus 10 according to the embodiment of the present invention, the C1 region on the trough 11 has a sufficient length in the direction of the arrow D compared to the size of the lump or entanglement of the ultrafine copper wire L. (See FIG. 3), the ultrafine copper wire L in a lump or entangled state is unraveled and landed a plurality of times to unwind many ultrafine copper wires L.

  Note that the surface 11a of the trough 11 in the C1 region is covered with a mesh M formed in a tatami mat to prevent the ultrafine copper wire L from being caught during movement, as described above. The main function in the C1 region is a drying preparation process C1 for loosening the lump and entangled ultrafine copper wire L. This mesh structure and vibration cause moisture W accumulated like a puddle around the ultrafine copper wire L and its Some of the moisture W held inside passes through the mesh M. The moisture that has escaped into the mesh M is appropriately dropped into the basket 17 and discharged together with the vibration of the drying device 10.

  Next, in the first drying step C2, evacuation is performed using the vacuum device 12, thereby roughly removing (dehydrating) the moisture of the ultrafine copper wire L (ST3). The drying preparation process C <b> 1 is a process of loosening the ultrafine copper wire L that is a lump or the tangled ultrafine copper wire L, and a process for drying the ultrafine copper wire L is not performed. Therefore, in the first drying step C2, first, water around the ultrafine copper wire L is removed.

  FIG. 8 is an explanatory diagram showing a state of the ultrafine copper wire L in the first drying step C2 of the drying step C according to the embodiment of the present invention.

  In the C2 region, the suction port of the vacuum device 12 opens over the entire width of the trough 11 in the width direction. In FIG. 8, the display of the mesh M formed in the C2 region is omitted, and the suction port of the vacuum device 12 is indicated by a broken line. The ultra-fine copper wire L moves on the surface 11a while repeating radiating and landing. Since the vacuum device 12 is installed so that a plurality of suction ports are located at positions as shown in FIG. 8, the ultrafine copper wire L on the surface 11a is sucked without exception.

  Since vacuuming using the vacuum device 12 is performed through a mesh M (not shown in FIG. 8), the ultrafine copper wire L itself is not sucked by the vacuum device 12, and only moisture is sucked. Is done.

  Also in the C2 region, the trough 11 moves in both directions indicated by the arrow G, so the ultrafine copper wire L continues to move as indicated by the broken arrow H in FIG. A state in which the ultrafine copper wire L is not entangled in all steps of the drying step C, as the ultrafine copper wire L continues the movement indicated by the broken line arrow H to unravel the remaining lump and entanglement in the C1 region. Is maintained. For this reason, when the ultrafine copper wire L is in a lump or entanglement state, the moisture contained therein is not present in the C2 region (because there is no lump or entanglement), and is therefore around the ultrafine copper wire L. Most of the moisture is sucked by the vacuum device 12.

  Furthermore, in the second drying step C3, the ultrafine copper wire L is heated to sufficiently remove (dry) moisture from the ultrafine copper wire L (ST4). Even if dehydration is performed using the vacuum apparatus 12 in the first drying step C2, the ultrafine copper wire L is rarely sufficiently dried, and a water film often remains on many ultrafine copper wires L. That is, the vacuum device 12 is suitable for removing moisture around the ultrafine copper wire L, but cannot completely remove the water film that covers the surface of the ultrafine copper wire L thinly. Therefore, in the second drying step C3, the ultrafine copper wire L is heated to evaporate the water film adhering to the surface.

  FIG. 9 is an explanatory diagram showing a state of the ultrafine copper wire L in the second drying step C3 of the drying step C according to the embodiment of the present invention. In the C3 region of the trough 11 in the second drying step C3, the surface 11a is not the mesh M but the metal surface S itself. Furthermore, as indicated by a broken line in FIG. 9, in the embodiment of the present invention, the heating device 13 is attached to the back surface 11b to heat the surface 11a in the C3 region.

  Also in the second drying step C3, the ultrafine copper wire L repeats radiating and landing on the surface 11a and moves in the direction of the arrow D. In the meantime, heat is transferred to the ultrafine copper wire L from the surface 11a and is radiated and heated even when it is dissipated and in the air. Thus, since the ultrafine copper wire L is always heated during the second drying step C3, the water film remaining on the surface of the ultrafine copper wire L is gradually evaporated and dried as the region C3 progresses. To do. And when the process of the 2nd drying process C3 is complete | finished, the ultrafine copper wire L will be in the completely dried state, and will be collect | recovered.

  As described above, after separation in the separation process of the copper wire and the covering material, a state in which the extra fine copper wire forms a lump or gets tangled in the middle of the movement to the drying process occurs. . In the drying process according to the embodiment of the present invention, instead of starting the drying process immediately with the lump or entanglement, the process of once loosening the lump or entanglement of the ultrafine copper wire is adopted as a drying preparation process, and the ultrafine copper wire is used. Is surely dried when moved to the actual drying process.

  Furthermore, the actual drying process is divided into two processes, a first drying process and a second drying process. In the former process, water around the ultrafine copper wire is removed by vacuum dehydration, and further in the next process. The water film adhering to the surface of the ultrafine copper wire is removed by heating. In this way, paying attention to the state of the ultrafine copper wire that is subject to drying at that time in three stages (including the preparation process), by performing a drying process suitable for each state, High extra-fine copper wire can be collected separately.

  Also, the drying equipment used in the drying process itself does not employ a special mechanism, and it does not employ a drying method that has been adopted so far, such as blowing hot air on copper wires, which saves energy and saves energy. Also consider.

  Therefore, it is possible to reliably dry an ultrafine copper wire with a simple and inexpensive configuration regardless of the amount of processing, and to reduce the environmental load and energy consumption, and a method for separating and collecting ultrafine waste electric wires and a drying apparatus. Can be provided.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. For example, in the embodiment of the present invention described above, the trough is formed in a so-called bowl shape with both walls facing the surface, but it is also possible to provide a ceiling surface at a position facing the surface. . By providing the ceiling surface, in the drying preparation process, a loose lump or entangled ultra-fine copper wire collides with the ceiling, and the impact is provided to unravel the lump or entanglement. In the second drying step, not only the trough surface but also the ceiling surface is heated, so that the water film on the surface of the ultrafine copper wire can be evaporated even when the ultrafine copper wire collides with the ceiling. Therefore, it is possible to accelerate the processing speed in each process by providing the ceiling surface.

  Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine the component covering different embodiment suitably.

DESCRIPTION OF SYMBOLS 1 ... Shearing device, 2 ... Pneumatic pipe, 3 ... Hopper, 4 ... Wet specific gravity separator, 5 ... Water supply part, 10 ... Drying device, 11 ... Trough, 11a ... Front surface, 11b ... Back surface, 11c ... Wall, DESCRIPTION OF SYMBOLS 12 ... Vacuum device, 13 ... Heating device, 14 ... Drive device, 15 ... Control device, 16 ... Base, 17 ... Trap, 18 ... Support tool, 19 ... Movable tool, 20 ... Pin, A ... Shearing process, B ... Separation Step, C ... drying step, C1 ... drying preparation step, C2 ... first drying step, C3 ... second drying step, DH ... arrow, L ... extra fine copper wire, M ... mesh, S ... metal surface, W ... moisture

Claims (9)

A shearing step for separating the extra fine waste electric wire into a covering material and an extra fine copper wire, a separating step for separating the mixed covering material and the extra fine copper wire into the covering material and the extra fine copper wire, respectively, and the extra fine copper In the method for separating and collecting ultrafine waste electric wires, comprising a drying step of drying the wire,
The drying process of the ultrafine copper wire is as follows:
A drying preparation step of loosening the ultrafine copper wire put in the trough of the drying device;
A first drying step of dewatering the untied ultrafine copper wire using a vacuum device;
A second drying step of heating and drying the dehydrated ultrafine copper wire with a heating device;
A method for separating and collecting extra fine waste electric wires, comprising:   2. The ultrafine copper wire sequentially proceeds through each step of the drying preparation step, the first drying step, and the second drying step while repeatedly radiating and landing on the trough. A method for separating and collecting ultrafine waste electric wires as described in 1.   The method for separating and collecting extra fine waste electric wires according to claim 1 or 2, wherein in the first drying step, the extra fine copper wire is dehydrated in a plurality of times by the vacuum device. A trough for sequentially proceeding according to each step of the drying preparation step, the first drying step, and the second drying step, the ultrafine copper wire separated from the ultrafine waste electric wire to be dried;
A vacuum device for dehydrating the ultrafine copper wire installed in a region where the first drying step is performed;
A heating device for drying the ultrafine copper wire installed in a region where the second drying step is performed;
A drive for vibrating the trough;
A control device for controlling the driving device;
A drying apparatus comprising:   The surface of the trough that is in contact with the ultrafine copper wire is incorporated with a mesh woven with metal fine wires in the region where the drying preparation process and the first drying process are performed, and the second drying process is performed. The drying device according to claim 4, wherein the region to be formed is made of a metal formed on a flat surface.   The drying apparatus according to claim 5, wherein the mesh is made by weaving the fine metal wires in a tatami mat.   The drying apparatus according to any one of claims 4 to 6, wherein the vacuum device is installed below the trough so as to dehydrate the ultrafine copper wire through the mesh.   The drying apparatus according to any one of claims 4 to 7, wherein the vacuum apparatus is installed over the entire width in the width direction of the trough to which the ultrafine copper wire moves. The drying apparatus according to any one of claims 4 to 8, wherein the heating device is installed on a back surface of a surface of the trough that contacts the ultrafine copper wire.

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