JP4917987B2 - Tire metal wire recovery device - Google Patents

Description

  The present invention relates to a tire metal wire recovery device that separates and recovers metal wires from tires that use metal wires as reinforcing materials.

  Tires generally used in transportation equipment such as automobiles are mainly composed of a rubber material having a hollow structure. A breaker cord in which a metal wire is knitted into a belt shape is provided on the inner surface of the hollow structure to prevent puncture caused by foreign matter sticking to the tread surface (grounding surface). Further, a bead wire made of a metal wire such as a piano wire is circumferentially embedded in the vicinity of the rim contact portion to reinforce the tire (maintain a donut shape).

In this tire, wear of the tread surface progresses with the use distance, and the tire cannot be used when the wear reaches a use limit. Many tires that have reached this limit are recycled and reused.
In this recycling, the rubber material and the metal wire constituting the tire are separately collected and transported to the reuse destination. For example, the rubber material generates a large amount of heat during combustion, so it is used as a fuel in cement factories, etc., or mixed with asphalt to improve drainage on highways and prevent noise generation. On the other hand, the metal wire is used as a raw material for steel as scrap.

  The metal wires separated and collected in the recycling process are in a state in which many cut pieces are stacked as they are, and are easily bulky for their weight. Therefore, there is a problem that a large amount of weight cannot be carried at a time in transportation on a truck or the like, and transportation efficiency is poor.

  Then, this invention makes it a subject to reduce the volume of the metal wire separated and collected from this tire in the recycling of the tire which uses the metal wire as a reinforcing material.

In order to solve the above-described problems, the present invention is configured to compress and recover the metal wires collected separately from the crushed pieces of the tire.
The metal wire can be efficiently transported by compressing and reducing the volume of the metal wire.

The present invention provides a recovery device that separates and collects metal wires from tires that use metal wires as a reinforcing material, a crusher that crushes the tires, and a rubber material and the metal wires that are crushed by the crusher. And a compressor for compressing and reducing the wires separated by the separator.
When the tire is crushed by the crusher, a strong external force (shearing force) is applied to the tire piece, so that the breaker cord provided on the hollow inner surface of the tire or the bead wire embedded in the tire is caused by the external force. The material is forcibly separated from the rubber material, and a crushed material in a state where the rubber material and the metal wire (breaker cord and bead wire) are separated and mixed is obtained.
The crushed material is separated into a rubber material and a metal wire by the sorting machine. As this sorting method, for example, various known methods such as a method using a difference in specific gravity, a method using a difference in size of crushed pieces, and a method using magnetic force can be adopted.
Moreover, as a compressor for compressing and reducing the volume of the metal wire, for example, a known two-way fastening or three-way fastening press using hydraulic pressure can be widely applied.

When this compressor is composed of a screw conveyor unit and a compression unit, and the metal wire put into the screw conveyor unit is conveyed to the compression unit, the degree of entanglement between the metal wires is caused by the rotation of the screw conveyor unit. It can also be increased.
When the degree of entanglement between the metal wires is low, even if an external force is applied to the metal wires and the compression is reduced once, the metal wires attempt to return to the original shape by the elastic force when the load is released. Therefore, a high degree of compression cannot be obtained.
On the other hand, when the metal wire is conveyed by the screw conveyor unit, the metal wires are rotated and entangled with the rotation of the screw conveyor unit, and the compression force is reduced by applying an external force in the entangled state. In other words, even if this load is released, the metal wires entangled with each other to be restored to the original shape by the elastic force are restrained to each other. For this reason, the metal wire compression body of the state which maintained the high compression degree can be obtained.

The crusher is composed of a multistage crusher in which the size of the crushing pieces after crushing is gradually reduced, and the tire is sequentially crushed with this crusher, and a sieve is provided between each crusher, It is also possible to throw the crushed pieces that have been sieved out into the next-stage crusher, while re-feeding the crushed pieces remaining on the sieve into the current-stage crusher.
By providing the crushers in multiple stages as described above, the burden on the crushing blades of the crusher can be reduced, and the size of the crush pieces can be reduced, so that handling in recycling becomes easy. Moreover, since the metal wire is more reliably separated from the rubber material by passing through a multistage crusher, the metal wire can be easily recovered.

Furthermore, at the time of separating and collecting the rubber material and the metal wire mixed by the crushing, a magnet may be provided in at least one of the crushing machine or the sorting machine, and only the metal wire may be separated by the magnet.
In this separation, only the metal wire is attracted to the magnet, so that the separation and collection of both can be easily and reliably performed.

  According to the present invention, in the recycling of a tire using a metal wire as a reinforcing material, the volume of the metal wire separated and collected from the tire can be reduced, so that the metal wire can be easily handled in the recycling process. Can do.

  An overall view of a tire metal wire recovery device according to the present invention is shown in FIG.

The tire metal wire recovery device includes a primary crusher 1, a rotary sieve 2, a secondary crusher 3, a separator 4, a compressor 5, a belt conveyor 6, a rubber material recovery container 7, and a metal wire. And a collection container 8.
The secondary crusher 3 and the sorter 4 include a magnetic separator (not shown), and the metal wire and the rubber material are separated and collected by the magnetic force generated by the magnetic separator.

  First, a tire 10 using a metal wire 9 as a reinforcing material is put into the primary crusher 1, and the tire 10 is crushed by a crushing blade (not shown) built in the primary crusher 1. The size of the crushed pieces 11 obtained by this crushing is about 100 mm. The crushed pieces 11 are conveyed to the rotary sieve 2 by the belt conveyor 6a.

  In the rotary sieve 2, the crushed pieces 11 of about 100 mm or less are screened out, and the crushed pieces 11 are transferred to the secondary crusher 3 by the belt conveyor 6b, while the crushed pieces 11 having a size exceeding about 100 mm. Is conveyed again to the primary crusher 1 by the belt conveyor 6c, and is crushed to a size (about 100 mm or less) that is sieved by the rotary sieve 2.

  The crushed pieces 11 sent to the secondary crusher 3 are further crushed to a size of about 5 mm by a crushing blade (not shown). In this crushed piece 11, a rubber material 12 and a metal wire 9 peeled from the rubber material 12 are mixed. First, the rubber material 12 is separated from the crushed pieces 11 by the magnetic separator and collected in the rubber material collection container 7.

  In the crushed piece 11 from which the rubber material 12 is separated as described above, the rubber material 12 that cannot be separated still remains together with the metal wire 9. The crushed pieces 11 are conveyed to the sorter 4 by the belt conveyor 6d, and only the metal wires 9 are adsorbed and collected by the magnetic separator provided in the sorter 4. The remaining rubber material 12 is collected in the rubber material collection container 7 by the belt conveyor 6e. Thereby, the crushed pieces 11 can be reliably separated into the rubber material 12 and the metal wire 9.

The metal wire 9 separated by the separator 4 is conveyed to the compressor 5 by the belt conveyor 6f, and is compressed and reduced by the compressor 5.
The compressor 5 will be described with reference to FIG. The compressor 5 includes a screw conveyor unit 13 and a compression unit 14.
First, the metal wire 9 conveyed from the sorter 4 is loaded into the loading port 15 of the screw conveyor unit 13. When the screw feeder 16 of the screw conveyor unit 13 is rotated around the rotation axis, the wings 16a of the screw feeder 16 apparently move toward the compression unit 14, and the metal wire 9 is also conveyed to the compression unit 14 along with this. The
During this conveyance, a rotating force around the rotation axis acts on the metal wire 9 by the rotating screw feeder 16, and the metal wire 9 is deformed (bent or the like) by the rotating force. Due to this deformation, adjacent metal wires 9 are entangled with each other.

The metal wire 9 in an entangled state in this way is compressed by receiving a compression force from the side wall 17 together with the pushing force accompanying the rotation of the screw feeder 16 in the compression unit 14 to become a metal wire compression body 18, and from the discharge port 19. Extruded and collected in the metal wire collection container 8.
For example, as shown in the figure, the compression force from the side wall 17 is such that the inner diameter of the side wall 17 is gradually reduced toward the discharge port 19, and the metal wire 9 passing through the inside of the side wall 17 is This occurs when the side wall 17 is gradually compressed in the radial direction.

  While passing through the side wall 17, the metal wire 9 is compressed and its volume is reduced in accordance with the degree of reduction of the inner diameter. In addition, during the compression, the volume of the metal wire 9 is reduced in a complicatedly entangled state, and even if the compression load is released, the metal wire 9 tends to return to its original shape due to its elastic force. The entangled metal wires 9 restrain each other (see FIG. 3). For this reason, the metal wire compression body 18 of the state with the high compression degree maintained can be obtained.

  In this way, the restraint between the metal wires 9 occurs because one metal wire 9 is bent and deformed as the screw feeder 16 rotates, and the end of the other metal wire 9 is inserted into this bent and deformed portion. It is understood that this is because even if the bent metal wires 9 are bent and deformed while being released and the load is released, the mutual movement (the movement to return to the original state by the elastic force) continues to be prevented.

  On the other hand, as shown in FIG. 4, the metal wires 9 are stacked in a state where the metal wires 9 are hardly bent (see FIG. 4A), and even when the metal wires 9 are compressed, the load is applied while an external force is applied. The volume is temporarily reduced (see (b) in the figure). However, since the binding force between the metal wires 9 does not act as described above, when the load is released, the original volume is returned to the original volume by the elastic force of each metal wire 9 (see FIG. 3C). As a result, the compression degree of the metal wire compression body 18 cannot be increased.

When the length of the metal wires 9 is long, the restriction between the metal wires 9 is less likely to occur because the number of the end portions per unit length is small. For this reason, it is difficult to obtain a high degree of compression when the compression load is released.
On the other hand, when the length of the metal wire 9 is short, the number of the end portions per unit length is large, so that the metal wires 9 are easily restrained. For this reason, even if the compression load is released, a high degree of compression is maintained.

  Specifically, the restriction by the metal wires 9 can be expected by setting the length (average length) of the metal wires 9 to 10 cm or less. Thereby, the metal wire compression body 18 can be maintained in the state with a high compression degree, and the conveyance efficiency of this metal wire 9 can be improved.

Overall view showing the device configuration of a tire metal wire recovery device according to the present invention Sectional view of the compressor according to the present invention It is a side view which shows the volume change at the time of performing compression volume reduction in the state which bent and deformed the metal wire, (a) is before compression, (b) is in compression load, (c) is after load cancellation | release It is a side view which shows the volume change at the time of performing compression volume reduction in the state which does not bend and deform a metal wire, (a) is before compression, (b) is during compression load, (c) is after load cancellation | release

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Primary crusher 2 Rotary sieve 3 Secondary crusher 4 Separator 5 Compressor 6 Belt conveyor 7 Rubber material collection container 8 Metal wire collection container 9 Metal wire 10 Tire 11 Fragmented piece 12 Rubber material 13 Screw conveyor part 14 Compression part 15 Input port 16 Screw feeder 16a Wing portion 17 Side wall 18 Metal wire compressed body 19 Discharge port

Claims (3)

In the collection device for separating and collecting the metal wire (9) from the tire (10) using the metal wire (9) as a reinforcing material,
Crusher (1) for crushing the tire (10), and a separator (4) for separating the crush pieces (11) crushed by the crusher (1) into a rubber material (12) and the metal wire (9) If, constructed from this sorter (4) in fractionated the metal wire (9) the compression volume reduction to the compressor (5), the compressor (5) is a screw conveyor unit and the compression unit (13) (14 ), And the compression part (14) includes a side wall (17) that gradually decreases in diameter toward the discharge port (19),
When the metal wire (9) charged into the screw conveyor unit (13) is conveyed to the compression unit (14), the metal wire (9) is rotated and entangled with the rotation of the screw conveyor unit (13). In this state, the compression force is applied from the side wall (17) of the compression part (14) to reduce the compression volume, and when the load is released, the metal wire (9) is caused by its elastic force. In the tire , the metal wires (9) are prevented from returning to the original uncompressed state by restraining each other, and the high compressibility of the compressed and reduced metal wires (9) is maintained . Metal wire recovery device. The crusher (1) is constituted by a multistage crusher (1) in which the size of the crushing pieces (11) after crushing is gradually reduced, and the crushing pieces (11) of the tire (10) are cleaved by the multistage crushing machines. The crusher (1) is sequentially crushed, and a sieve (2) is provided between each crusher (1), and the crushed pieces (11) are put into the next-stage crusher (3). On the other hand, the metal wire recovery device for a tire according to claim 1, wherein the crushed pieces (11) remaining on the sieve (2) are reintroduced into the crusher (1) at the current stage. The tire metal wire recovery according to claim 1 or 2 , wherein a magnet is provided in at least one of the crusher (1) or the sorter (4), and only the metal wire (9) is separated by the magnet. apparatus.

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