JP2001259456A - Rotary cutter for crusher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably crush materials to be treated for a long term while reducing the replacement frequency of a blade body 13 so as to realize the reduction of the hour necessary or replacement work and the reduction of the operator's labor by suppressing wear of the blade body 13 of a rotary cutter for a crusher. SOLUTION: In the rotary cutter for the crusher where the blade bodies 13 each having a cutting edge 17 to an outer peripheral side are attached to an outer periphery of a rotary cutter main body 11 rotated around an axis line O attachably and detachably, each blade body 13 is formed from one or two sorts or more among cemented carbide, high-speed tool steel, ceramics and cermet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary blade for a crusher for crushing a processed material with a fixed blade in a single-shaft crusher, for example.

[0002]

2. Description of the Related Art A single-shaft crusher having a rotary blade for a crusher of this type is disclosed in, for example, Japanese Patent No. 2613362.
On the main body of the rotary blade rotatable about the axis placed horizontally, a large number of blades in the form of a square flat plate turn the square surface in the direction of rotation of the rotary blade body and form one of the corners of the square surface. Projecting to the outer peripheral side, and being detachably attached by bolts and holding metal fittings, and having a saw blade shape in which unevenness is opposite to a mountain shape formed by a cutting edge crossing the corner portion of the blade body. In addition, there has been proposed a type in which a fixed blade having a large number of blades also having a square plate shape is horizontally fixed, and the rotating blade and the fixed blade cooperate to crush the processed material. . In particular, according to the crusher described in this publication, crush resistance can be reduced by providing the fixed blade at a position shifted from a horizontal line passing through the axis of the rotary blade, and the blade is rotated around its circumference. By reversing by reversing or reversing, it is possible to use a plurality of corners and a cutting blade intersecting the corners with one blade body.

[0003]

By the way, the processed materials crushed by such a crusher include household appliances such as refrigerators, washing machines, air conditioners, televisions, and the like, which are discarded as industrial waste, and waste plastics. There are various things, such as paper, thread, glass, etc., and their hardness also varies. However, conventionally, steel materials such as SKD materials and SKH materials have been used as the blades of the crusher as described above. Therefore, if a harder material is contained in the processed material, for example, FIG. As shown in the figure, particularly, the corner portion 3 protruding from the outer peripheral side of the square surface 2 of the blade body 1 directed to the rotation direction side of the rotary blade and the cutting blades 4 and 4 intersecting with the corner portion have severe wear V, and the blade body There is a problem that the life of one of the corners is expended early and, in some cases, it must be replaced before another corner part is used. However, especially in the case of rotating blades, the number of blades is larger than that of fixed blades, so even if blades are replaced when worn out, it takes a lot of time for replacement work, etc. This results in a heavy burden. Furthermore, when the blades of these rotary blades and fixed blades wear, the clearance between the cutting blades of the blades of the rotary blade and the blades of the fixed blade becomes large, and the processed material is reliably crushed. There is also a problem that it is not possible to do so.

The present invention has been made in view of such circumstances, and in particular, in a rotary blade for a crusher used as a rotary blade of a single-shaft crusher as described above, the wear of the blade body is suppressed. This reduces the frequency of blade replacement, shortens the time required for replacement work, and reduces the labor of the operator. In addition, the rotation for the crusher, which can promote stable crushing of the processed material over a long period of time. The purpose is to provide a blade.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and achieve such an object, the present invention provides a rotating blade body which is rotated about an axis, and which has a cutting blade protruding outward. A rotary blade for a crusher having a blade body detachably mounted thereon, wherein the blade body is formed from one or more of cemented carbide, high-speed tool steel, ceramics, and cermet. It is characterized by having done. Therefore, by forming the blade body constituting the cutting blade of the rotary blade from such a hard material having high wear resistance, even if a hard material is mixed in the processing object, wear of the blade body is suppressed. And the life can be extended.

Materials such as cemented carbides, high-speed tool steels, ceramics, and cermets are hard and have high wear resistance, but are poor in toughness, that is, brittle, and have an excessive impact when crushed. When a mechanical load acts, for example, as shown in FIG. 12, damage C such as chipping or chipping of the cutting edge 6 or the corner portion 7 of the blade body 5 may occur, and the life of the blade body 5 may be shortened. In particular, in the rotary blade of a crusher such as the present invention, the rotary blade body rotates around an axis and crushes the processed material between the fixed blade and crushes the workpiece. There is a problem in that it is larger than a blade and easily generates an impact load. Therefore, in order to prevent the occurrence of such chipping and chipping, the blade is made of a hard material having a particle size of 0.5 to 10 mm.
μm WC powder is sintered with a relatively high-toughness cemented carbide, or the blade is formed in a flat plate shape, and one of the flat surfaces faces the rotating direction of the rotary blade body. At the same time, it is preferable that the cutting edge is formed on the side ridge of the flat plate surface, and the cutting edge is further honed. In particular, when the blade is formed of a cemented carbide having the above-mentioned particle size, by further setting the particle size appropriately in accordance with the material to be processed, wear, chipping, and chipping of the blade are more reliably achieved. Can be suppressed.

[0007]

1 to 4 show a first embodiment of the present invention.
1 shows an embodiment of the present invention. In the present embodiment, the rotary blade main body 11 has a substantially columnar outer shape, is rotated around its central axis O in a rotation direction indicated by a symbol T in the drawing, and is horizontally disposed on the side of the rotary blade main body 11. The processing object is crushed between the fixed blade S and the processed fixed blade S. Here, the outer peripheral surface of the rotary blade main body 11 has a rectangular shape as viewed from the outer peripheral side, and in a cross section orthogonal to the axis O, a large number of U-shaped recesses are formed on the outer peripheral side and concave on the inner peripheral side. Are formed so as to form rows at equal intervals in the direction of the axis O in parallel with the axis O, and to form four such rows at equal intervals in the circumferential direction. In addition, between the rows adjacent in the circumferential direction, the concave portions 12, 12 adjacent in the direction of the axis O of one of the rows.
The other row of recesses 12 is located at the center between them. The blades 13 are detachably attached to the recesses 12 via a cartridge 14, respectively.

The blades 13 are made of one of cemented carbide, high-speed tool steel, ceramics, and cermet, or two or more different materials for each blade 13. Particularly, in the present embodiment, all the blade bodies 13 have a particle diameter of 0.1 mm.
5 to 10 μm WC powder is mixed with a binder such as Co to 5 to 30 μm.
It is formed of a cemented carbide that is mixed and sintered to have a binder phase amount of wt%, and has a hardness of 80 to
95HRA. In the present embodiment, the blade 13 is formed in a square flat plate shape.
Cutting edges 17 are formed on the flat surface, that is, on the side ridges of the pair of square surfaces 15, 15, at all the side ridges intersecting the corners 16 of the square surfaces 15, 15. Further, as shown in FIG. 4, the crossing angle θ of the cutting edge 17 with respect to the square surface 15 in the cross section orthogonal to the cutting edge 17 is in a range of 15 ° to 45 °, and the square surface 1
A chamfer honing 18 having a width W in a direction parallel to 5 and not more than 0.5 mm is formed. Also, this blade 1
3, a mounting hole 19 is formed so as to penetrate between the central portions of the square surfaces 15, 15, and the opening of the mounting hole 19 on the square surface 15, 15 side is formed on the square surface 15, 15 side. The tapered surface shape increases in diameter toward.

On the other hand, as shown in FIG. 3, the cartridge 14 has a rectangular parallelepiped shape whose base end can be inserted into the concave portion 12 and has a triangular chevron end. A mounting seat 20 to which the blade body 13 can be mounted is formed in the portion. The mounting seat 20 has a mounting seat bottom surface 20A to which the square surface 15 of the blade body 13 can adhere.
And 4 of the blade body 13 arranged around the square surface 15
Are formed by V-shaped mounting seat wall surfaces 20B, 20B to which a pair of adjacent side surfaces 21, 21 of the two side surfaces 21... Can be contacted, and the blade body 13 is provided at the center of the mounting seat bottom surface 20A. The mounting hole 22 is formed so as to be coaxial with the mounting hole 19 in a state in which the mounting hole 19 is mounted, and a mounting screw is formed so as to be orthogonal to the mounting hole 22 from the ridge portion of the triangular tip surface of the cartridge 14. A hole 23 is formed. Note that the distal end surface of the cartridge 14 is inclined so as to retreat toward the base end side as the distance from the mounting seat 20 side increases.

The cartridge 14 thus formed
The rotary blade main body 1 has the mounting seat 20 oriented in the rotational direction T.
1, the base end of which is inserted into the recess 12, and the clamp screw 2 inserted through the base end.
4 and 24 are screwed into the bottom of the recess 12,
It is detachably attached to the rotary blade main body 11. And
The blade body 13 has one square surface 15 directed to the rotation direction T side and the other square surface 15
A, and the one corner 16 of the one square surface 15 is made to slightly protrude from the triangular tip end surface of the cartridge 14, and the corner 16 on the opposite side to the one corner 16 is A pair of intersecting sides 21, 21
Is brought into contact with the mounting seat wall surfaces 20B, 20B to be seated on the mounting seat 20 of the cartridge 14, and
A head 25A is formed in a countersunk shape, and a mounting pin 25 having a V-shaped annular groove 25B at the tip is inserted into the mounting holes 19 and 22 from the rotation direction T side.
An attachment member 26 such as a conical tip attachment screw or a ball plunger, the tip of which can be engaged with the annular groove 25B, is screwed into the attachment screw hole 23 and the attachment pin 25 is pulled in. It is detachably attached to the main body 11.

However, the blade body 13 attached to the rotary blade body 11 in this manner is such that the cutting blades 17, 17 intersecting the one corner portion 16 of each cartridge 14 are viewed from the rotation direction T side. Are formed so as to form a right-angled isosceles triangular mountain shape on the outer peripheral surface of the cutting blades 13. 13, each of which has a saw blade shape as shown in FIG. 1 continuously in the direction of the axis O. The fixed blade S has a cutting edge E formed so as to have a saw-tooth shape in which the unevenness is opposite to that of the saw blade formed by the rotation locus of the cutting blade 17. Are arranged horizontally on the side of the rotary blade main body 11 so that the cutting blade E is at the same height as the axis O so as to mesh with the saw blade formed by the rotation locus of. Also, each blade 13 is shown in FIG.
In a cross section orthogonal to the axis O as shown in FIG.
The one square surface 15 facing the rotation direction T with respect to the straight line L passing through the one corner portion 16 is located on the rotation direction T side, and the intersection angle between the straight line L and the one square surface 15; That is, the blade body 13 is mounted so that the mounting angle α is 30 ° or less.

Accordingly, in the rotary blade for a crusher constructed as described above, first, the blade body 13 constituting the cutting blade 17 is used.
Is made of one or more of cemented carbide, high-speed tool steel, ceramics, and cermet, and is harder than conventional steel materials such as SKD materials and SKH materials and has higher wear resistance. Therefore, even if the material to be crushed contains a hard material, the first corner portion 16 protruding from the blade body 13, particularly the outer peripheral side of the rotary blade body 11, and intersects with the corner portion 16. It is possible to suppress the wear of the cutting blades 17 and 17 from being significantly promoted. For this reason,
The service life of the blade body 13 can be extended, which is economical, and of course, the frequency of replacement of the blade bodies 13 can be reduced, and the time required for the replacement work during the total work time of the crushing work can be reduced. It is possible to promote the reduction of the working time and the labor of the operator, and the cutting blades 17, 17 of the blade body 13 of the rotary blade.
The clearance between the cutting blade and the fixed blade can be stably maintained for a long period of time, and the processed material can be reliably crushed.

In the present embodiment, the blade 13
Is formed of a cemented carbide obtained by sintering WC powder having a particle size of 0.5 to 10 μm, and is hard and has high abrasion resistance, but among the above-described hard materials having poor toughness and brittleness, A relatively high toughness can be given to the blade body 13.
Therefore, according to this embodiment, an impact load is intermittently applied to crush the processing object between the fixed blade and the rotating blade while rotating with the rotation of the rotary blade main body 11. In the blade body 13, due to the impact load, the blade body 1
It is possible to suppress not only wear but also damage such as chipping and chipping on the corner 16 and the cutting blades 17 and 17 of the above-mentioned 1 of 3, and furthermore, together with the suppression of wear, further improvement. The service life can be extended, and more reliable crushing of the processed material can be promoted.

By the way, a cemented carbide obtained by sintering a WC powder having such a particle size may further include a fine cemented carbide having a particle size of 1 μm or less, depending on the particle size of the powder.
Medium-grain cemented carbide with a grain size of 1 to 4 μm and a grain size of 4 μm
m and coarse-grained cemented carbides, each having different properties such as wear resistance and fracture resistance. That is, among cemented carbides having a particle size of 0.5 to 10 μm, fine particles having a particle size of 1 μm or less have high wear resistance due to fine particles, but are inferior in chipping resistance, and therefore have higher It is unsuitable for crushing of processed materials that are affected by impact, but exhibits higher wear resistance compared to those of other particle sizes for crushed processed materials that significantly accelerate abrasion . vice versa,
Coarse particles having a particle size of 4 μm or more are stronger than impact particles, but have poorer abrasion resistance, and have a particle size of 1 to 4 μm.
The medium-grained particles exhibit characteristics intermediate between these fine particles and coarse particles. Therefore, even if the blade body 13 is formed of a cemented carbide obtained by sintering WC powder having the same particle size of 0.5 to 10 μm, if the processed materials to be crushed have substantially the same properties, Blade body 13 made of cemented carbide having a particle size corresponding to this
It is desirable to use.

Table 1 below shows which grain size of the cemented carbide in the grain size of 0.5 to 10 μm is suitable for a specific treated material. Double circles are particularly suitable combinations, single circles are appropriate but inferior to double circles, and triangles can be crushed but compared to double circles or single circles Represents an unsuitable combination. However, as shown in Table 1, fine-grain cemented carbide having a particle size of 1 μm or less is relatively soft, such as waste plastic, paper, or thread, and has a small impact when the blade 13 bites, but is crushed. It is optimal because it can exhibit good abrasion resistance to a processed material that is easily deformed at the time of the above-mentioned process and is worn by rubbing the surface of the blade body 13. On the other hand, a coarse-grained cemented carbide having a particle size of 4 μm or more is relatively hard like a glass or vitreous material, and is pulverized by an impact at the time of biting to reduce contact with the blade 13. Perfect for things. In addition, processed products in which soft components such as plastics and metal wires, such as home appliances, and hard components, such as metal structural materials and CRTs for televisions, are mixed. Medium-grain cemented carbide with the combination of

[0016]

[Table 1]

FIG. 5 shows the fine, medium and coarse particles of a cemented carbide obtained by sintering WC particles having a particle size of 0.5 to 10 μm, and the cemented carbide of the hard material. The blade 13 is formed of a high-speed tool steel (HSS) as a material other than the alloy, and the blade 13 is attached to the rotary blade body 1.
10 shows the results of comparing the wear resistance when the processed material is crushed by a single-shaft crusher having the crushing and rotating blade of the embodiment according to the change in the wear width. However, the processed material crushed here is waste plastic, and the blade 13 has a length of one side of the square surface 15 of 40 mm and a thickness of 20 mm, and the crusher is operated continuously for 8 hours a day. While the processing object was continuously charged, the wear width VB (mm) in the direction orthogonal to the square surface 15 of the side surface 21 of the blade body 13 was measured.

However, from the results shown in FIG. 5, the blade 13 made of high-speed tool steel has a greater wear width than the blade made of steel such as SKD or SKH, though not shown. Although the increase was small, in about 50 hours (on the 7th day of operation), the wear width reached 10 mm, which is half of the thickness of the blade 13, and then, the blade 13 was used by rotating or turning it around. However, the seating stability on the mounting seat 20 was impaired and rattling occurred, so that the seat had to be replaced. On the other hand, when the blade body 13 is made of a cemented carbide obtained by sintering WC powder having a particle size of 0.5 to 10 μm, the wear width is generally smaller than that of the high-speed tool steel. Is small, and high wear resistance is obtained. In particular, in the case of fine particles having a particle size of 1 μm or less, 200
Even after a lapse of time (25 days of operation), the abrasion width was about 3 mm, and the same result could be obtained even after the blade body 13 was rotated around, turned over, and reattached.

Further, in the crushing and raising rotary blade of the first embodiment, the blade body 13 is formed in the shape of a square flat plate as described above, and the square surface 15, 15 of which the rotation direction T side is oriented. Cutting edge 17 formed on all side edges
The chamfer honing 18 is formed by forming the chamfer honing 18 so that the chamfer honing 18 does not cause the cutting edge 17 that is susceptible to chipping or chipping to remain sharp at a right angle in cross section. Is formed so as to intersect the square surface 15 and the side surface 21 at an obtuse angle, even if the blade body 13 is formed of the above-described fine-grained cemented carbide, the cutting edge 17 is damaged. And the service life can be further extended. In this embodiment, the square surface 15 of the chamfer honing 18 is used.
Is set in the range of 15 to 45 ° and the width W in the direction parallel to the square surface 15 is set to 0.5 mm or less. However, the intersection angle θ and the width W exceed this range. This is because the effect of the honing process may not be sufficiently exhibited, or the sharpness of the cutting blade 17 may be reduced. In the present embodiment, the chamfer honing 18 is formed on the cutting blade 17, but the honing process may be round honing.

On the other hand, in the first embodiment, the blade body 13 formed in the shape of a square flat plate has a cross section orthogonal to the axis O with respect to a straight line L passing from the axis O to the first corner portion 16. Is attached to the rotary blade main body 11 such that one square surface 15 facing the rotation direction T is located on the rotation direction T side, so that the one corner portion 16 of the blade body 13 is separated from the axis O. It is possible to dispose it so as to be located on the outermost side. However, the blade body 13 provided in this manner has the smallest clearance between the first corner portion 16 and the cutting edge 17, 17 intersecting the corner portion 16 with the cutting edge E of the fixed blade S. The side surface 21 of the blade body 13 connected to the cutting blades 17, 17 is crushed because it draws a locus retreating inwardly with respect to the rotation locus around the axis O of the cutting blades 17, 17. The contact between the processing object and the side surface 21 can be avoided as much as possible, whereby the abrasion of the side surface 21, that is, the abrasion of the cutting blade 17 can be suppressed more reliably.

Further, as described above, the blade body 13 is
The cutting blade 1
For example, as shown in FIG. 2, if the fixed blade E is at the same height as the axis O as shown in FIG. 2, the processed material is located between the end opposite to the corner 16 and the fixed blade E. , And the processing material is gradually cut toward the one corner portion 16 side so as to be crushed.
In particular, it is possible to more reliably prevent an impact load from acting on the corner portion 16 where the chipping is most likely to occur, whereby the life of the blade body 13 can be extended. In the present embodiment, the attachment angle α of the blade body 13 formed by the straight line L and one of the square surfaces 15 is set to be equal to or less than 30 °. One square surface 15 facing the rotation direction T side of the blade body 13
May become too large, and inconvenience may occur, for example, in order to make the cutting blades 17, 17 protrude from the outer periphery of the rotary blade main body 11 at a required protruding height, the blade body 13 must be enlarged. It is.

Further, in the present embodiment, the blade body 13 is formed in the shape of a square flat plate, and the pair of square surfaces 15,
Cutting edges 17 are formed on all the side ridges of the cutting edge 15, and the blade body 13 thus formed is formed on one of the square surfaces 15.
Of the rotary blade body 1 by protruding the first corner portion 16 to the outer peripheral side.
As described above, when the wear is generated on the corner 16 of this 1 and the cutting blades 17 around the corner 16 connected to the corner 16 due to the long-term crushing operation, the blade is detachably attached to 1. The blade body 13 is rotated around the mounting hole 19 by 90 degrees at a time, and is re-mounted, or reversed and mounted again, so that a total of eight corner portions 16 formed on one blade body 13 are formed. .. And all of the cutting blades 17 intersecting with this can be used evenly, which is economical. In addition, even when the blade body 13 is reattached or the blade body 13 is replaced in this manner, in the present embodiment, the mounting member 25 is pushed into the mounting pin 25 inserted into the mounting hole 19 by the mounting member 26 so that the mounting seat 26 is mounted. 20 and the mounting member 26 is attached to the rotary blade main body 1.
1 is slightly loosened by operation from the outer peripheral side of the mounting pin 2
Since the blade body 13 can be easily attached and detached after passing through 5, it is possible to reduce the time itself required for replacement work and the like and the labor itself of the operator.

In this embodiment, the blade 13 is
The other square surface 15 is the mounting seat bottom surface 20 of the mounting seat 20.
Although it is detachably attached to the cartridge 14 so as to be in close contact with A, the attachment posture of the blade body 13 to the attachment seat 20 can also be appropriately changed according to the properties of the processing object. That is, for a processing object such as the above-mentioned glass or vitreous material which is relatively hard and is likely to cause chipping or chipping of the cutting edge 17 of the blade body 13, the chamfer honing 18 is relatively formed as shown in FIG. The square surface 15 on the inner peripheral side of the mounting seat bottom surface 2
0A or a spacer 27 made of cemented carbide is interposed between the square surface 15 and the mounting seat bottom surface 20A as shown in FIG. Such a situation may be prevented. For a relatively soft and easily abraded material such as waste plastic, paper, or thread, the chamfer honing 18 is reduced or omitted as shown in FIG. The side surface 21 and the cartridge 14 may be smoothly connected without any step so as to prevent wear from occurring at such a step. By reducing or omitting the chamfer honing 18 in this manner, it is possible to improve the sharpness of the cutting blade 17 with respect to the above-mentioned soft processed material and obtain an effect of obtaining good friability. Can be

Next, FIGS. 9 and 10 show a second embodiment of the present invention, wherein the same reference numerals are assigned to parts common to the first embodiment shown in FIGS. And the description is omitted. That is, in the second embodiment, a plurality of V-shaped cross-sections of the same shape and the same size that orbit around the axis O annularly around the outer periphery of the rotary blade main body 31 having a substantially cylindrical outer shape rotated around the axis O. Are formed so as to be continuously arranged in the direction of the axis O, and the blade body 13 is attached to these grooves 32 via a cartridge 33. Here, the concave groove 32 has a V-shaped cross section formed at an included angle of 90 °, a groove width substantially equal to the length of a diagonal line of the square surface 15 of the blade body 13, and The base end is formed in the shape of a square block capable of closely adhering to the groove 32, and the entire square surface is the mounting seat bottom surface 20 </ b> A of the mounting seat 20. After being brought into close contact with each other, they are joined by welding, brazing, or the like, and attached to the outer periphery of the rotary blade main body 31.

As in the first embodiment, the blade 13 protrudes one corner 16 of the one square surface 15 to the outer peripheral side so that the one square surface 15 is directed in the rotation direction T and the other square surface 15 is rotated. And the pair of side surfaces 21 and 21 intersecting the corner 16 opposite to the corner 16 with the concave groove 32.
The cartridge 3 is brought into contact with the 90 ° V-shaped groove wall surface of the cartridge 3.
3 and is detachably attached to the outer periphery of the rotary blade main body 31 via the base 3. The blade bodies 13 are arranged so that the pair of blade bodies 13 and 13 are located opposite to each other across the axis O in one groove 32, and every other blade 13 in the direction of the axis O is provided. Are arranged at the same position in the circumferential direction for each of the grooves 32, and at positions shifted by 90 ° around the axis O between the adjacent grooves 32, 32 in the direction of the axis O. 13 are arranged in rows in the direction of the axis O at regular intervals in parallel with the axis O, and in the circumferential direction, four rows are arranged at regular intervals in the circumferential direction. Further, between the rows adjacent in the circumferential direction, the blade bodies 13 of the other row are located at the center between the blade bodies 13 adjacent to each other in the direction of the axis O of one row. The cutting edge 17 of the body 13 has a sawtooth shape continuously in the direction of the axis O in the rotation locus about the axis O. It is.

Accordingly, even in the rotary blade for a crusher according to the second embodiment having the above-described configuration, the blade 13 is made of one of cemented carbide, high-speed tool steel, ceramics, and cermet.
A cemented carbide made of two or more of these different materials for each seed or blade 13, and in particular, all blades 13 are made by sintering WC powder having a particle size of 0.5 to 10 μm. Thus, the same effect as in the first embodiment can be obtained. Further, in the second embodiment, the concave groove 32 extends in the rotation direction T side of the one square surface 15 of the blade body 13, and accommodates the crushed processed material and is provided below the fixed blade S. Since a large space for discharging is ensured, it is possible to prevent a situation in which the crushed processing material debris accumulates above the fixed blade S and causes clogging, thereby achieving a more stable crushing operation. be able to.

[0027]

As described above, according to the present invention,
A blade body that is detachably attached to the outer circumference of the rotary blade body,
By forming one or two or more of cemented carbide, high-speed tool steel, ceramics, and cermet, the wear of the blade can be suppressed and its life can be prolonged even after long-term use. By reducing the frequency of blade replacement, it is possible to reduce the time required to stop the crusher for blade replacement during the total time of crushing work, and to reduce the labor of the operator. It is possible to improve the work efficiency in the crushing work. Also, among such hard materials, if the blade is formed of a cemented carbide obtained by sintering WC powder having a particle size of 0.5 to 10 μm, the impact load acting upon crushing can be improved. In addition to this, it is possible to further increase the life of the blade by preventing chipping and chipping from occurring in the blade, and furthermore, by appropriately setting the particle size, it is possible to match the properties of the processed material. Optimum crushing can also be achieved.

[Brief description of the drawings]

FIG. 1 is a plan view showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA in FIG.

FIG. 3 is a diagram illustrating attachment of a blade body 13 according to the first embodiment.

FIG. 4 is a sectional view of a blade body 13 according to the first embodiment.

FIG. 5 is a diagram illustrating a relationship between an operation time of a crusher and a wear width of a blade body 13 when crushing a processed product (waste plastic) according to the first embodiment.

FIG. 6 is a view showing an example of a mounting posture of a blade body 13;

FIG. 7 is a view showing another example of the mounting posture of the blade body 13;

FIG. 8 is a view showing another example of the mounting posture of the blade 13;

FIG. 9 is a plan view showing a second embodiment of the present invention.

FIG. 10 is a sectional view taken along the line BB in FIG. 9;

FIG. 11 is a view showing the blade body 1 on which wear V has occurred.

FIG. 12 is a view showing the blade body 5 in which damage C such as chipping or chipping has occurred.

[Explanation of symbols]

 11, 31 Rotary blade body 13 Blade body 14, 33 Cartridge 15 Square surface (flat surface) of blade body 13 Corner of blade body 17 Cutting blade 18 Chamfer honing 20 Mounting seat O Axis of rotary blade body 11, 31 T Rotation direction of rotary blade bodies 11, 31 S Fixed blade E Fixed blade S Cutting blade

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Ken Takahashi 1528 Nakashinden, Yokoi, Kobe-cho, Yasuhachi-gun, Gifu F-term in Mitsubishi Materials Corporation Gifu Works (reference) 4D065 CA17 CC01 DD05 DD19 EB02 EB14 EC03 EC05 EC09

Claims (3)

[Claims] 1. A rotary blade for a crusher in which a blade body having a cutting blade protruding to the outer peripheral side is detachably attached to an outer circumference of a rotary blade main body that is rotated around an axis. A rotary blade for a crusher, characterized by being formed from one or more of cemented carbide, high speed tool steel, ceramics, and cermet. 2. The crusher according to claim 1, wherein the blade body is formed of a cemented carbide obtained by sintering WC powder having a particle size of 0.5 to 10 μm. Rotary blade. 3. The blade body is formed in a flat plate shape,
One of the flat surfaces is attached in the direction of rotation of the rotary blade body, and the cutting edge is formed on a side edge of the flat surface, and the cutting edge is further honed. The rotary blade for a crusher according to claim 1 or 2, characterized in that: