JP2002067031A - Device and method for cutting tire rubber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the cutting off of a surface layer rubber, and the rubber grain collection from waste tires more efficient by improving a rasp method for producing a powder-form rubber grain and a cylindrical cutting blade method for producing a string-form rubber piece, in the cutting of a tire surface layer rubber, and also, manufacture a rubber grain having a value. SOLUTION: A large number of triangular wing-like cutting-crushing blades having a less resistance are fitted on a rotary blade. In such a rotary blade, a load applied to the blade is divided in the vertical and lateral directions, and an air port to cope with heating under a normal temperature is not required. Also, the rotary blade can be used for a long period of time without requiring polishing. The tire surface layer rubber and waste tire band-form rubber pieces are cut into a T-shape at a high speed, and at the same time, are crushed. Then, they are discharged to a collecting box having a tilted bottom section and a duct attaching port, under the rotary blade by a centrifugal force, and sent by a duct to an optional location. Such a series of processes is simplified into one process for the cutting device. By such a cutting device, a useful rubber grain of an optional size can be manufactured by setting the width and the height of the blade.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cutting tire rubber, a method for cutting surface rubber, a method for cutting dismantled rubber pieces, and a method for collecting belt-shaped rubber pieces from waste tires.

[0002]

2. Description of the Related Art Conventionally, tread rubber cutting required for manufacturing a retreaded tire for a vehicle is performed by cutting most of the tread rubber using a rasb (saw blade) method and a cylindrical cutting blade in advance, and then polishing using a rasb. The peeling method for finishing is mainly used, and the rubbing method is used in the manufacture of retreaded tires for aircraft, and the cutting of waste tire tread rubber is not performed.

[Problems to be solved by the invention]

[0003] The above-mentioned rasb method has an advantage in that the cut rubber particles are discharged in a powder form, so that it can be sucked and collected using a dust collector, and the collecting operation is excellent. The heat generated by the abrasion increases the temperature of the rasb, and the temperature rise causes the abrasion to proceed further. The increased cutting force and reduced sharpness cause a large load, which shortens the durable life of the rasb, increases the frequency of replacement, and consumes power. There was a problem that the amount was large and the energy cost was high.

[0004] In particular, in the grinding of the surface layer rubber of an aircraft tire, the above-mentioned rasb having a width of 0.8 mm gradually wears,
The grinding ability is lost before cutting 3 to 4 pieces by cutting 7 to 10 mm, it is necessary to replace it with a new grinding rub, and it is inferior in durability and requires considerable skill to achieve a certain finished state. In short, since the work is not easy, a grinding tool in which a diamond sintered material is welded to a tip saw blade has been proposed (Japanese Patent Application No. 7-223273, a surface grinding tool for soft wear-resistant members such as rubber tires). The durability of the blade has been improved. However, the sintered material tip is an oblique notch blade alternately on one side like a rasb, and because the width of the body is wider than the rasb, the load is further increased and the energy cost is higher, and a plurality of ventilation holes for grinding heat countermeasures are provided. However, abrasion is required due to wear of the blade tip, and the rubber particles produced by grinding are powdery, have poor utility value, and have a problem in grinding efficiency.

[0005] In the peeling method, the durability life of the luss is three times or more and the power consumption is about half that of the luss method, which is advantageous in terms of cost. There was a problem that workability was inferior. That is, cutting of tread rubber by the conventional peeling method, while rotating the tire around the axis of the drive shaft,
Cutting the tread rubber of the tire with a cylindrical cutting blade,
The cutting is performed by passing the string-shaped cut rubber piece through the hollow portion of the cylindrical cutting blade and discharging the cut piece.

However, in discharging the above-mentioned cut cord-shaped rubber piece, clogging is apt to occur when the cut cord-shaped rubber piece passes through the hollow portion of the cylindrical cutting blade. Since an operation is required, the above-mentioned problem of clogging is improved by cutting while cutting the cut rubber piece having passed through the hollow portion with a take-off roll. But,
Since the discharged cut rubber pieces are discharged in the form of a string, there is a problem in that a large amount of labor is required for the operation of packing in a bag or a box, and the recovery workability is poor.

[0007] In order to improve the problem of clogging and the problem of workability caused when the cord-shaped rubber piece passes through the hollow portion, a notch in the axial direction is previously formed on the tread rubber surface of the tire. A proposal has been made in which a plurality of the cutting blades are formed around the periphery and cut by the cylindrical cutting blade so that the cut rubber piece is formed into a small piece and discharged from the hollow portion of the cylindrical cutting blade (Japanese Patent Laid-Open No. Hei 6 (1994)).
−64067, a method for cutting tread rubber of a tire), so that the collection workability is improved. However, since a step of forming a notch in the surface rubber surface of the tire is added, there is a large problem such as an increase in manufacturing cost.

The surface rubber of the waste tire is not cut, and the waste tire or the like is entirely immersed in a low-temperature liquefied gas such as liquid nitrogen, and the treated material in the low-temperature liquefied gas is sandwiched by a pair of electrodes at opposing positions. There is known a low-temperature pulverization method in which an impact is applied by pulverization in liquid to pulverize. However, the above low-temperature pulverization method consumes a large amount of liquid nitrogen and increases the size of the apparatus. Therefore, a piece of waste tire or the like is sheared into chips each having a size of about 5 cm, and the crushed pieces are formed into a cylindrical shape. A method of spraying liquid nitrogen in a horizontal chamber and subjecting it to impact crushing to a particle size of about 5 mm or less has been proposed (Japanese Patent Laid-Open No.
156225-Pulverization method and apparatus for rubber molded product).

Also, a waste rubber chip having a side of about 5 cm,
In order to reduce the particle size to 1 to 4 mm or 0.8 mm or less, a shearing method is employed by engaging a screw or the like provided on each of the multi-axes, and to suppress the temperature rise of the rubber chip during the shearing,
A cooling device is provided instead of spraying liquid nitrogen for cooling the cylinder and shaft of the extruder, and a proposal has been made to reduce costs (Japanese Patent Laid-Open No. 11-207742, manufacturing method and manufacturing apparatus for recycled rubber). The above rubber pieces are obtained by breaking waste tires into chips of about 5 cm on a side by a shearing machine, and many of them are used as fuels in factories while containing steel wires. Therefore, there is a problem that the shearing machine is severely worn, repairing it requires a lot of cost and time, and requires a large amount of power.However, there is a big problem such as a necessity of a steel wire removing process. .

In view of the above-mentioned problem of the shearing machine, the peripheral surface of the waste tire is subjected to high-frequency induction heating to facilitate separation of steel wires and rubber.
A method of peeling rubber pieces from steel wires has been proposed (Japanese Unexamined Patent Publication No.
21977, a method for separating and recovering vulcanized rubber and steel wires of tires, and a method and an apparatus for producing recycled rubber disclosed in JP-A-11-207742, etc.) to reduce the wear of a shearing machine by extracting a bead core, Improvements have been made, such as saving labor in the magnetic separation method of separating steel wires from rubber. However, the high-frequency induction heating apparatus proposed above is large and expensive, and the production of rubber particles of 1 to 4 mm is a low-temperature pulverization method.

The applicant of the present invention developed a rotary grinding blade (utility model registration No. 1326223, 1980), and then developed a roll grinding blade (Japanese Patent Laid-Open No. Sho 62-304279, Roll Grinding Blade, Japanese Patent Laid-Open No. 1-146353). Using a roll crushing blade), we conducted cutting experiments at room temperature, such as sweet potatoes, carrots, dried wood, etc., as well as waste rubber surface rubber at room temperature. By the side edge cutting blades which spread to the left and right at an acute angle as described above, and the arc-shaped sharp tip cutting blades, the rubber particles pulverized in the shape of hiji at the same time as the cutting without heat and smoke were released by centrifugal force. However, only a thin wire can be used to fix a small blade, and it is difficult to incorporate it into a holder, which requires time and effort. In addition, it was reinforced with an adhesive, but a blade that escaped due to centrifugal force or the like appeared.

In order to solve the above problem, a proposal has been made in which a protruding portion is provided on a blade and the blade is fixed to a bar holder (Japanese Patent Application No. 2-1300).
However, there is a problem in that it takes time and effort to manufacture a bar holder that holds a large number of small blades from both sides, and it is difficult to arrange the bar holders, and the blade heights are not uniform. In view of this, a proposal has been made to insert the blade column into a plug-in type (Japanese Unexamined Patent Application Publication No.
-228388. Grinding machine with prismatic tip.
253503, a prismatic cutting tip fixing bar for a crusher), but it is difficult to manufacture the fitting hole, and the fixing of many small blades with an adhesive or the like is poor in reliability. It turned out to be unusable and could not be put to practical use.

[0013]

In order to solve the problems of removing the tire surface layer rubber and collecting the rubber particles, the blade proposed by the present applicant (Japanese Patent Application Laid-Open No. 09-136041, cutting and crushing blade and its assembly) is described above. The blade is fixed and escaped, which is composed of a sharply protruding tip like a spear tip, a wing-shaped side edge cutting blade of a triangular wing machine with low resistance, and a sharp arc-shaped cutting edge. The bar holder is provided with a fitting hole for inserting the blade from the fitting groove at the bottom for prevention, height adjustment of the blade, and assembling work, and the blade has a shoulder extending from the side of the blade column in the rotating direction. Is provided, the shoulder of the base portion abuts against the shoulder contact portion of the fitting groove, the blade height is uniform, and there is no escape of the blade, so that it becomes practical.

A high-speed rotating blade provided with a plurality of bar holders, which are provided with the plurality of practically used blades so as to be alternately arranged back and forth in the rotation direction, is mounted on a rotating body. Although it can abut the rubber at a right angle and cut the surface rubber, the load on the rotating blade is small because it is divided into four parts at the top, bottom, left and right of the tip blade, and there is no heat generation or smoke generation. No need to provide, long-term durability, no polishing required, surface layer rubber is cut into a T-shape at room temperature and the rubber particles pulverized in the shape of hiji are centrifugal force, and the inclined receiving hole at the lower part of the rotating body And a cutting device discharged into a collection box having an inclined bottom provided with a duct mounting port.

The strip-shaped rubber piece of the waste tire is sent by a gear intermittently restrained on a receiving table sent by a conveyor or the like, and comes into contact with a rotary blade. It is discharged into a collection box having an inclined bottom provided with an inclined receiving port at the lower part of the rotating body and a duct attachment port, and can be delivered to the duct at an arbitrary location.

Since the above-mentioned band-shaped rubber piece cutting can be mass-produced at low cost by the apparatus according to the first aspect, the expensive high-frequency induction heating device can be reduced in size and cost even in collecting the accompanying band-shaped rubber piece. A pair of left and right high-frequency induction heating devices that can approach the upper surface and both side surfaces of the upper part of the tire suppresses the tire that rotates at least one turn, makes it easier to separate rubber from steel wires, and reduces the cost of strip-shaped rubber pieces at low cost. Can be collected.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the rotating blade 1 is perpendicularly attached to the rotating tire surface rubber 21 and belt-shaped rubber piece 27. And a means for collecting the cut rubber particles. The opening 1 is formed in the upper cover 15 of the peripheral surface of the rotary blade 1 which comes into contact with the tire surface rubber 21 at right angles.
6 is provided, and the rotary blade 1 is provided by the present applicant (Japanese Unexamined Patent Application Publication No.
36041, Cutting and crushing blade and its assembly>
4 is attached to the rotating body 12 via the bar holder 13,
The tire rubber cutting device includes a collecting box 17 having a receiving port 18, a duct mounting port 19, and an inclined bottom portion at a lower portion of the cover 15.

The rotary blade 1 has a flat plate shape as shown in FIGS. 3 and 4, and has a tip blade 14a and a tip blade 14a at a point where both right and left edges intersect at an acute angle in the rotational direction. Of the blade 14 composed of the tip cutting edge 14b and the side edge cutting blade 14d, which is formed by the arc-shaped notches 14d at the lower portions of both edges connected to the base, the shoulder of the base column portion 14f extending from the isosceles front surface of the blade column portion 14e. The portion 14g is a shoulder contact portion 13d of the fitting groove 13c.
, To prevent the blade from coming off, to make the blade height uniform, and to facilitate incorporation into the bar holder 13. If necessary, the bar holder 13 is provided with a support 13a for supporting the blade 14 from behind, and if necessary, the blade 14 is brazed and fixed from the fitting groove 13c to the support 13a to prevent the blade 14 from breaking. Can be prevented. Further, as illustrated in FIG. 2, a plurality of bar holders 13 arranged and fixed are mounted on a rotating body 12 to which a rotating shaft 11 is fixed so that a plurality of cutting and crushing blades 14 are alternately arranged in a traveling direction. The blade 1 is constituted.

As shown in FIGS. 1 and 2, the cover 15 on the outer surface of the rotary blade 1 has a collection box 1 having a lower inclined bottom.
7, the tire 2 which is opposed to and rotates with the surface rubber 21
A large opening 16 is provided for collecting the cut rubber particles at a right angle to the container, and a collecting box provided with a slanted bottom 18 having a slanted receiving port 18 and a duct mounting port 19 below the cover 15. 17 are provided and constitute a cutting device.

The method of removing the tread rubber 21 on the surface layer of the tire 2 will be described with reference to FIGS. 5 and 6. The surface rubber 21 is cut into a T shape by the tip blade 14a and the side edge cutting blade 14c at the same time by the rotating rotary blade 1, and cut by the tip cutting blade 14b in a hajiji shape. This is a method for cutting tire surface rubber, which is discharged to a collection box 17 having a slanted bottom having a mouth 19 and can be delivered to an arbitrary location by duct.

As described above, the waste tire 2 from which the surface rubber 21 has been cut is heated by the high-frequency induction heating coil 45 as shown in FIG. After removing the bead core 23, the tire 2 is cut off, and the belt-like rubber pieces 27 separated from the steel wires are separated.
Is sent to a receiving plate 32 on a receiving plate base 33 which comes into contact with the rotary blade 1 at a right angle by a conveyor 31 or the like as shown in FIG.
This is a method of cutting a tire rubber piece in which the rubber particles which are sent in contact with the rotary blade 1 and cut and pulverized are housed in a collecting box 17 by centrifugal force and can be delivered to an arbitrary location.

If a method of collecting dismantled tire rubber pieces as a pre-process of cutting the strip-shaped rubber pieces 27 is described with reference to FIG. 10, it can be moved up and down around a rotation shaft 42a on a base 41,
And the left and right rotating rolls 42b and 42c interlocked with the rotating shaft.
The waste tire accommodated on the base 41 with the right roll 42b lowered is a high frequency that can be approached from the left and right to the surface and both sides of the upper part of the tire held by the slide tools 43b of the left and right arms linked to the slide shaft 43a. Induction heating coil 4
According to 5, after heating at least during one rotation of the tire,
After the bead core 23 was pulled out from the cut 26 in the carcass ply 25 folded back by the bead core 23 with a tongue fitting, the rotating roll left 42c was lowered, and the discharged tire was cut by a shearing machine or the like, and the steel wire was cut. This is a method of recovering a strip-shaped rubber piece that is peeled off from a belt.

[0023]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
Diameter 164mm, cutting width 98mm, 2,000r. p.
A plurality of bar holders 13 arranged and fixed so that a large number of cutting and crushing blades 14 are alternately arranged back and forth in the rotation direction are mounted on the rotating body 12 of m, and abut against the waste tire surface rubber at a right angle, and A cutting experiment was performed on the waste tire 2 and the tread rubber 21 that rotate at a low speed around the axis facing the rotating rotary blade 1.

The cutting and crushing blade 14 has a blade width of 1.4 mm.
height of 0.3 mm, thickness of tip blade and side edge cutting blade of 0.3 mm, blade width of 2.38 mm, blade height of 1.5 mm, 0.4
mm blade thickness, 3.5 mm blade width, 2 mm blade height,
The experiment with three types of 0.5mm blade thickness was carried out at room temperature without any heat generation measures. It was released and was collected in the collection box 15 provided below the rotating body 12.

In a cutting experiment of a waste rubber crawler for a caterpillar, the blade width was 3.5 mm and the blade height was 2 mm.
A rotating blade 14 having a blade thickness of 0.5 mm is fixed to a rotating body 12 having a plurality of bar holders 13 mounted thereon. At room temperature in summer without providing ventilation holes for heat control, the width is about 30 mm and the height is about 30 mm. The rubber crawler cut to 37 mm was cut, but no generation of heat and no fuming resulted in the production and recovery of hijiki-like rubber particles. As a result, it has been found that the tread rubber 21 for the retreaded aircraft tire 2 can be manufactured more efficiently and at lower cost than the rubbing or tip saw type grinding tool. However, it is better to set the blade width in rubber crawler cutting to 2.5 mm and the blade thickness to 0.3 mm to reduce the load and improve sharpness.

When the bar holder 13 is attached to the small and medium blades 14 among the three large, small and medium rotary blades 14, the two blade holders are arranged alternately in the rotation direction. And a support 13b protruding from the bar holder body 13a to prevent breakage, but brazing was omitted, and FIG. 2 (Japanese Patent Application No. 9-136).
041), the plurality of cutting and crushing blades 14 attached to the bar holder attached before and after are arranged so as to be alternately arranged,
The overlapping part of the front and rear side edge cutting blades 14c is 0.1
4 mm to 0.5 mm.

The size and length of the above-mentioned hijiki-like rubber particles are as follows:
Since it can be selected depending on the blade width and the blade height of the rotary blade 14 and the size of the rotary body 12, any useful elastic-like rubber grains having elasticity can be obtained. Although the cemented carbide sintered material was used as the blade material of the cutting and crushing blade 14, since there is little resistance and heat generation due to load, there is no need for polishing and it can be used for a long period of time. The width of the rotary blade 1 was widened, so that the rotary blade 1 could be efficiently removed. Further, as shown in FIGS. 1 and 2, at the same time as the high-speed cutting of the tread rubber 21 of the tire 2 rotating at a low speed around the axis, the tread rubber 21 is formed on the upper portion of the tire 2 by using another small cutting device (not shown). 21 shoulders can be cut.

Next, from the waste tire, the tread rubber 21 and the carcass 24 can be recovered from the carcass 24 by a small cutting device (not shown). Further, the strip-shaped rubber pieces 27 peeled off from the steel wires after dismantling the waste tire 2 are sent to a receiving plate 32 on a receiving plate base 33 perpendicular to the rotary blade 1 by a conveyor 31 or the like as shown in FIG. The rubber particles which are fed by the intermittent rod-shaped gear 34 and contact the rotary blade and cut and pulverized are stored in the collection box 15 like the above-mentioned hijiki-like rubber particles, and can be delivered to an arbitrary place.

As a pre-process of the above-mentioned strip-shaped rubber piece cutting, the rotary roll 42b on the right side of the high-frequency induction heating coil 45 shown in FIG. 10 is lowered and accommodated, and the rotary roll 42b is returned to a horizontal position, and slides in conjunction with the slide shaft 43a. Roll 44 fixed to arm 43c on tool 43b, rotating shaft 4
The upper surface and the left and right side surfaces of the upper portion of the waste tire 2 which are held by the holding roll 44 on the 2a and which can be rotated stably by the rotating rolls 42b and 42c interlocking with the rotating shaft 42a are brought close to a predetermined interval. With the pair of high-frequency induction heating coils 45, the entire surface of the waste tire that rotates at least one rotation is heated, and the steel wires and the rubber are easily separated from each other. Then, from one end of the carcass ply 25 that is folded back by the bead core 23, After removing the bead core 23 from the cut 26 cut to the vicinity of the bead core 23 using a toe-like fitting, the waste tire 2 discharged by lowering the left rotating roll 42c is cut into 4 to 8 sections, and then the tread belt Near both ends of the carcass 22, the carcass 24 parts on both sides were cut off by a shearing machine, peeled off from the steel wires, and the belt-shaped rubber pieces 27 were collected.

[0030]

In removing the surface rubber, the T-shaped cutting by the rotary blade 14 of the present invention does not generate heat because of a small load on the blade, does not require a ventilation hole, can be used at room temperature, and requires polishing. Because it is a structure that does not use it, it can be used for a long time and energy cost is low, and useful and valuable hijiki rubber particles crushed at the same time as removing high-efficiency surface rubber are released by centrifugal force and are collected on the inclined bottom of the recovery box It can be collected near the duct installation port provided at one end and delivered to any location. That is, high-speed cutting, crushing, and recovery are simplified into one process, and labor is saved, so that the cost of manufacturing retreaded tires can be significantly reduced.

In the recycling of waste tires, valuable hijiki-like rubber particles can be collected by cutting not only the surface tread rubber but also the surface rubber on both sides, and from steel wires that can be easily separated by high-frequency induction heating of small equipment, Since the stripped rubber strip is cut and useful rubber particles are efficiently mass-produced at low cost, recycling of waste tires can be promoted.

Conventionally, waste rubber crawlers for caterpillars, which had been considered extremely difficult, could be efficiently cut and pulverized at room temperature without generating heat or smoke, so that they can be used not only for tire surface rubber for aircraft, trucks and buses but also for various cutting and pulverization. it can. For example, this device has a high value of use in many fields such as vehicle tubes, paper, pulp, styrofoam, vinyl waste, processed wood chips, frozen products, industrial waste, and household waste.

[Brief description of the drawings]

FIG. 1 is a side view of a tire rubber cutting device according to the present invention, in which arrows indicate rotation directions.

FIG. 2 is a front view of the cutting device as viewed from a workpiece.

FIG. 3 is a perspective view of a cutting and crushing blade of the cutting device of the present invention.

FIG. 4 is a side view of a bar holder equipped with the cutting and crushing blade of FIG. 3;

FIG. 5 is a side view showing a method for cutting a tire surface rubber according to the present invention, in which arrows indicate rotation directions.

FIG. 6 is a rear view showing the method for cutting a tire surface rubber according to the present invention.

FIG. 7 is a cross-sectional view of an aircraft retreaded tire to which the present invention is applied.

FIG. 8 is a cross-sectional view of a retread tire such as a truck and a bus and a waste tire to which the present invention is applied, and a cross-sectional view to which a waste tire high-frequency induction heating coil is added.

FIG. 9 is a side view showing a method of cutting a waste rubber dismantled belt-shaped rubber piece of the present invention, in which arrows indicate rotation directions.

FIG. 10 is a side view showing a method of high frequency induction heating of a waste tire for stripping a rubber strip from a steel wire, which is one of main processes of cutting a rubber strip.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotating blade 11 Rotating shaft 12 Rotating body 13 Bar holder 13a Supporting body 13b Fitting hole 13c Fitting groove 13d Shoulder abutment part 14 Cutting crushing blade 14a Tip blade 14b Tip cutting blade 14c Side edge cutting blade 14d Arc-shaped notch 14e Blade column Part 14f Base pillar part 14g Shoulder part 15 Cover 16 Opening 17 Recovery box 18 Receptacle 19 Duct mounting port 2 Refurbished tire or waste tire 21 Tread rubber 22 Tread belt 23 Bead core 24 Carcass part 25 Carcass ply 26 Cutout 27 Strip rubber strip 31 Conveyor 32 Receiving plate 33 Receiving plate stand 34 Gear 41 Base 42a Rotating shaft 42b Rotating roll (entrance / right) 42c Rotating roll (outlet / left) 43a Slide shaft 43b Slide tool 43c Arm 44 Holding roll 45 High frequency induction heating coil

Claims (4)

[Claims] 1. A means in which a rotary blade comes into contact with a tire surface rubber and a tire disassembly rubber piece at a right angle, and rubber particles pulverized at the same time as cutting are discharged to a collection box below the rotary blade cover by centrifugal force and discharged at an arbitrary position. The rotary blade has a flat plate-like shape with a flat shape, and has a tip blade at a point where both left and right edges intersect at an acute angle in the rotational direction, and a circle below both edges connected to the tip blade. Due to the arc-shaped notch, the shoulder of the base pillar extending from the isosceles of the blade pillar of the blade formed of the front cutting edge and the side edge cutting blade formed at the shoulder contact portion of the fitting groove of the bar holder. A plurality of bar holders arranged so that the plurality of blades abutting and fixed in the fitting holes are alternately arranged back and forth in the rotation direction are rotating blades mounted on a rotating body, and the tire surface rubber and the disassembly are provided. Open lower part of the rubber piece against which the rotary blade abuts at right angle A collecting box having a duct mounting opening and an inclined bottom portion. 2. The rotary blade according to claim 1, wherein said rubber blade is adapted to abut at right angles to the tire surface rubber rotating in the axial rotation direction. A method of cutting a tire surface rubber, wherein the rubber is housed in a collection box having an inclined bottom portion at a lower portion of the cover so that the duct can be delivered to an arbitrary location. 3. A strip-shaped rubber strip dismantled by a conveyer or the like is fed by a gear intermittently restrained at an upper portion of a receiving stand, and abuts at right angles to a rotary blade of the cutting device according to claim 1. The rubber particles that are crushed at the same time as cutting and released by centrifugal force are housed in a collecting box having an inclined bottom under the rotating blade cover so that they can be delivered to the duct at any point, and the waste tire belt rubber How to cut a piece. 4. A pair of left and right high-frequency induction heatings on a rotating roll that can be tilted about a rotation axis, the upper surface and the left and right side surfaces of the upper part of the waste tire accommodated in a plurality of left and right holding rolls can be brought close to a predetermined interval. The coil is used to heat the tire at least one rotation to remove the bead core, and then disassemble the tire taken out of the gantry and collect the band-shaped rubber piece from the steel wire. Collection method.