JP2926399B1 - Sand production equipment - Google Patents

Abstract

The present invention provides a sand producing apparatus capable of obtaining sand having a uniform grain size and small particle diameter, that is, sand close to natural sand, and without damaging a hose or the like for feeding the obtained sand. . SOLUTION: A rotatable disk 3 rotatably supported and rotated by receiving a driving force from a motor, and a fixed disk 6 displaceably supported in the direction of the rotation axis of the disk, have one side facing each other. Liners 5, 6 made of a material harder than the rough stone used as the raw material for sand
A plurality of ridges are respectively formed on the surfaces of both liners, and a liner 7 provided on the fixed-side disk 6 includes:
A guide passage 39 is provided for guiding an ore supplied from the hopper 37 to the outlet side opened on the surface side of the liner 7 by an inclined surface and supplying it between the disks 3 and 6, and the ore supplied from the hopper 37 to between the liners. Are crushed and crushed by the ridges of the liner 7 and the ridges of the liner 5 provided on the rotating rotating disk 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sand producing apparatus for producing sand from gravel or the like as a raw ore.

[0002]

2. Description of the Related Art Conventionally, as this kind of sand producing apparatus, for example, the one shown in FIG. 6 is known. 62 is a differential generally used in automobiles, 63 is a rotating support provided on a shaft that is rotated by the differential 62, 64
Reference numeral denotes a drum main body which is supported by the rotary support 63 and rotates by the rotation of the rotary support 63. A plurality of crushing rods are inserted into the drum main body 64. This drum body 6
4 is rotated by a rotating support 63 which is rotated by a motor (not shown) via a differential device 62, so that the crushing rod repeatedly rolls and falls within the drum body 64.

[0003] In the production of sand by this apparatus, a raw ore as a raw material of sand is charged from a charging ore hopper 65 into a rotating drum body 64.
The rotation of the main drum 64 causes the crushing between the crushing rods that roll down and fall in the drum main body 64 or the friction between the crushing rod and the liner in the main drum 64. The crushed stone is discharged downward from the discharge port of the discharge hopper 66. A trommel (sieve) 67 is provided at the ore outlet, and crushed stones discharged from the ore outlet are applied to the trommel 67 to sort sand.

[0004]

However, in the above-mentioned conventional sand manufacturing apparatus, the rolling friction between the rods inserted into the drum main body 64 or between the rods and the liner inside the drum main body 64 causes the friction in the drum main body 64 to be reduced. Is crushed, the particle size and the shape of the product (sand) formed by the crushing greatly depend on the size and weight of the rod inserted into the main drum 64. However, there is a problem that it is difficult to obtain small-sized sand having a uniform grain shape, that is, sand close to natural sand. In addition, the sand thus obtained has many sharp edges, and when such sand is sent by a hose or the like, there is a problem that the hose is damaged or the hose is clogged. .

The present invention has been made in view of such conventional problems, and its object is to obtain sand having a uniform grain size and small particle size, that is, sand close to natural sand. It is an object of the present invention to provide a sand producing apparatus which does not damage a hose or the like for feeding the sand.

[0006]

According to a first aspect of the present invention, there is provided a sand producing apparatus comprising: a rotating disk which is rotatably supported and rotates by receiving a driving force from a motor; A fixed disk supported so that it can be displaced is arranged with one side facing each other, and a liner made of a material harder than the rough stone that is the raw material for sand is provided on the opposed surfaces of the rotating disk and the fixed disk. A plurality of ridges are formed on the surfaces of both liners, and the fixed-side disk and the liner provided on one side thereof are fed from a hopper arranged on the upper side of the other side of the fixed-side disk. A guide path is provided to guide the rough stone to the outlet side opened on the surface side of the liner provided on the fixed side disk by an inclined surface and to supply it between the rotating side disk and the fixed side disk, and is supplied between the two liners from the hopper. Rough stones are set on the fixed disk. It is configured to crush and to crush by the projections of the rotation-side liner which is provided on a rotating disc with Ina of projections, provided on further the rotating side disc and one side thereof
The liner has a rotating disk on the surface of the liner
Aligns with the exit of the guide passage opened to the liner of the fixed disk
Opening at a position such that the opening
When the outlet of the guide passage coincides with the outlet of the guide passage,
A storage recess for storing a rough stone to be stored is provided .

[0007] With this configuration, when a rough stone is introduced from the hopper, the rough stone is guided by the inclined surface of the guide passage and sent to the outlet side of the guide passage opened to the surface of the liner provided on the fixed disk. At the exit, the ore collides sequentially with a plurality of ridges of the liner due to the rotation of a liner provided on the rotating disk, and the ore is repeatedly crushed and reduced by this collision. Here, the reduced size of the ore is such that the recess formed between adjacent ridges of the liner provided on the fixed-side disk and the recess formed between adjacent ridges of the liner provided on the rotating-side disk are combined by the relative rotation of both liners. It enters into the gap between the two concave portions, which can be formed, and collides with the respective ridges of both liners sequentially by the relative rotation of the two liners in this gap. Further, the rough stone reduced here is crushed by the opposing ridges of both liners due to the relative rotation in the gap formed between the ridges of both liners (the smallest gap formed between both liners), and the granules are crushed. Drops as small grains (sand).

As described above, the ore charged from the hopper is repeatedly crushed and reduced in size while rolling in the gap formed between the concave portions of the two liners due to the relative rotation of the two liners. In the smallest gap formed between the ridges of the liner, the ridges are crushed by opposing ridges and fall as sand having a small particle diameter. Therefore, the grain shape of the dropped sand becomes substantially uniform and has no corners. By adjusting the gap formed between the two liners by displacing the fixed-side disk in the rotation axis direction (that is, the gap formed between the ridges of both liners), sand having a desired particle size can be obtained. In addition, the ore supplied from the hopper is guided by the inclined surface of the guide passage and sent to the outlet side opened on the surface of the liner provided on the fixed-side disk. It can be smoothly and sequentially sent to the exit side of the guide passage facing the space between them.

[0009]

Further, when the opening of the storage recess coincides with the exit of the guide passage due to the relative rotation of the two liners, a part of the rough at the outlet is pushed by the rough behind and discharged into the storage recess. Stored. The rough stored in the storage recess is carried in the circumferential direction by the rotation of the liner provided on the rotating disk, where it is successively crushed and reduced by the respective ridges of the liner provided on the fixed disk. To go. The reduced ore enters the gap between the two liners from the storage recess and falls as sand having a small particle size as described above. As described above, a part of the rough stone sequentially sent to the exit side of the guide passage is stored in the storage recess each time the storage recess matches the exit of the guide passage due to the relative rotation of the two liners. At the exit of the passage, the ore is sequentially crushed by collision with the respective ridges of the liner provided on the rotating disk, and the rough stored in the storage recess also collides with the respective ridges of the liner provided on the fixed disk. Therefore, the raw stones input from the hopper can be dispersed and crushed efficiently.

[0011]

[0012]

Further, in the sand production apparatus according to the first aspect, the surface of the liner provided on the fixed disk is continuously or discontinuously circumferentially extended at a plurality of radial positions having different radii. In addition, a plurality of band-shaped convex portions extending at least continuously on the lower side are provided on the outermost peripheral side.

With this configuration, the ore sent between the two liners from the exit of the guide passage first collides with the ridges and is crushed and crushed. The disk travels in the outer peripheral direction, particularly downward, and in the process, passes sequentially from the central convex portion to the peripheral convex portion. The rough stone passing through the convex portion is crushed by the convex surface of the convex portion and the convex line of the liner of the rotating disk each time the raw stone passes, so that sand having a more uniform grain size and no corners is obtained.

[0015] Further, since a band-shaped convex portion extending at least continuously on the lowermost side is provided on the outermost peripheral side of the convex portion, the crushed and crushed rough stone (sand) is necessarily formed in the band-shaped convex portion. Portion, thereby preventing sand having a diameter larger than the desired particle size from falling.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a perspective view showing an entire embodiment of a sand producing apparatus according to the present invention, with a part thereof being omitted, FIG. 2 is a front view of the sand producing apparatus, and FIG. FIG. 4 is a front view of a liner provided on a fixed disk, and FIG. 5 is a perspective view of a liner provided on a rotating disk.

As shown in FIGS. 1 and 2, the sand producing device 1 is supported by a rotating disk 3 that rotates by receiving a driving force from a motor 2 and is displaceable in the direction of the rotation axis of the disk 3. A fixed-side disk 6 is provided, and one side of each of the disks 3 and 6 is arranged to face each other. Liners 5 and 7 are provided on the opposing surfaces of the disks 3 and 6, respectively, and are fixed by a number of bolts 4 or other methods. Both discs 3 and 6 are made of metal such as iron, and both liners 5 and 7 are each made of a material harder than a rough stone (gravel collected from river or sand) as a raw material of sand, for example, a metal such as manganese. I have.

The rotating shaft 8 of the rotating disk 3 has bearings 11, 12 fixed on bearing bases 9, 10, respectively.
Are supported horizontally and rotatably at two places.
The center of the rotating disk 3 is fixed to one end of the rotating shaft 8 so that the rotating disk 3 is in a vertical state, and the large-diameter sprocket 13 is fixed to the other end. This sprocket 1
3 and a small-diameter sprocket 14 fixed to the output shaft of the motor 2, a chain belt 15 is wrapped around the chain shaft 15. The rotation of the motor 2 is reduced at a predetermined reduction ratio, and the rotation shaft 8 and the rotation-side disk are rotated. 3, and the rotating disk 3 is rotated at a predetermined number of revolutions. In FIG. 2, reference numeral 16 denotes a support for supporting the entire apparatus.
The bearing bases 9 and 10 are supported thereon.

As shown in FIG. 2, the other side surface (the surface on the rotating shaft 8 fixed side) of the rotating disk 3 is pressed in a direction perpendicular to this surface (the rotating shaft direction) to rotate the rotating disk 3. A plurality of disk receiving rollers 17 (though not shown in the present example, but arranged at substantially equal intervals in the circumferential direction) for suppressing the blur are provided. These disk receiving rollers 17
Are held on a roller base 18 composed of left and right columns fixed on a support 16 and a horizontal reinforcing member for connecting the both columns.

As shown in FIGS. 2 and 3, slide bases 19 are fixed to the left and right two places on the other side of the fixed disk 6, and an inverted V-shaped slider 20 is provided at the lower end of each slide base 19. Fixed. The left and right sliders 20 are slidably fitted on left and right inverted V-shaped slide bases 21 fixed on the support base 16, respectively.
A fixed disk 6 is supported so as to be displaceable in the rotation axis direction. In this example, the fixed-side disk 6 is
And a liner 5 (hereinafter, referred to as a fixed side liner 7) provided on one side of the rotating disk 3.
(The rotation side liner 5) can be displaced in the rotation axis direction within a range from a position where the gap becomes 0 mm to a position where the gap becomes a predetermined distance (for example, 170 mm).

Outside the lower ends of the left and right slide frames 19, two stopper plates 22 are fixed at predetermined intervals in the rotation axis direction. Between the left and right stopper plates 22, the engaging portions of left and right safety hooks 23 whose base ends are rotatably supported on the support base 16 in a plane perpendicular to the rotation axis direction can be inserted. It has become. When each of the engaging portions of the left and right safety hooks 23 is inserted between the left and right stopper plates 22, the left and right slide bases 19 are locked, and the fixed-side disk 6 and the fixed-side liner 7 are displaced in the rotation axis direction. You can't do that. Thus, it is possible to prevent the fixed-side disk 6 and the fixed-side liner 7 from moving in the direction of the rotation axis during operation and thereby changing the distance between the two liners 5 and 7.

Further, as shown in FIGS. 2 and 3, the left and right slide bases 19 and the fixed side disks 6 fixed to the both bases 19 are displaced in the rotation axis direction by hydraulic pressure. An interval adjusting means 24 for adjusting the interval between the two liners 5, 7 by hydraulic pressure is attached. The interval adjusting means 24 includes two left and right lower hydraulic hoists 25 for pushing and pulling the respective lower ends of the left and right slide frames 19 by hydraulic pressure, and two right and left lower hydraulic hoists for pushing and pulling the respective upper ends of the left and right slide frames 19. It includes four hydraulic hoists with an upper hydraulic hoist 26.

Left and right hydraulic hoist bases 28 to which the respective hydraulic cylinders 27 of the left and right lower hydraulic hoists 25 are fixed.
Are fixed on a support 16. Each hydraulic cylinder 2
The distal ends of the rods 29 sliding in the inside 7 are connected to left and right connection members 30 fixed to the lower ends of the left and right slide stands 19, respectively.

On the other hand, left and right hydraulic hoist frames 31, 31 for mounting the left and right upper hydraulic hoists 26 are arranged behind the left and right slide frames 19, respectively, and are fixed on the support table 16. Left and right hydraulic hoist stand 3
The left and right reinforcing plates 1 and 31 are respectively reinforced by left and right reinforcing plates 32 and 32 fixed on the support base 16. Each hydraulic cylinder 3 of the left and right upper hydraulic hoists 26
The left and right hydraulic hoist bases 34 to which 3 is fixed are fixed to the upper ends of the left and right hydraulic hoist gantry 31, respectively. The distal ends of rods 35 sliding in the respective hydraulic cylinders 33 are respectively connected to left and right connection members 36 fixed to the upper ends of the left and right slide frames 19.

The interval adjusting means 24 constructed as described above
Operates the four hydraulic hoists 25, 26 so that the rods 29, 35 of the respective hoists are displaced by the same amount in the same direction, thereby moving the left and right slide bases 19 and the fixed-side disk 6 in the rotation axis direction. The distance between the two liners 5, 7 can be adjusted by displacement.

As shown in FIGS. 2 and 4, the fixed disc 6 and the fixed liner 7 are supplied with a raw material supplied from a hopper 37 disposed on the upper side of the other side of the fixed disc 6 at the inlet side. There is provided a guide passage 39 which is guided by an inclined surface 38 to an outlet side opened on the surface side of the fixed-side liner 7. The entrance of the guide passage 39 is connected to the upper end 4 of a wall portion 40 protruding from the other side surface of the fixed disk 6 forming the upstream side of the passage 39.
1 is open. The upper end 41 is connected to the lower end of the hopper 37 by welding or the like, whereby the outlet opened at the lower end of the hopper 37 communicates with the inlet of the guide passage 39.
The outlet 42 of the guide passage 39 is formed by a lower end portion (a lower right portion in FIG. 4) of an opening 43 that opens in an arc shape on one side surface of the fixed-side liner 7.

On the other hand, as shown in FIG. 5, the rotating disk 3 and the rotating liner 5 are fixed on the surface of the liner 5 when the rotating disk 3 and the rotating liner 5 rotate. Each having an opening 44 opened at a position corresponding to the outlet 42 of the guide passage 39 opened to the side liner 7,
Four rectangular storage recesses 45 are provided for storing raw stones discharged from the guide passage 39 when the opening 44 matches the outlet 42 of the guide passage 39. Four storage recesses 45
Are arranged at substantially equal intervals in the circumferential direction,
A flat portion that receives a rough stone pushed out from the outlet 42 of the guide passage 39 toward the rotary side liner 5 side (pressed by a rough stone on the rear side) and conveys the rough stone in the circumferential direction with the rotation of the rotary side disk 3 and the rotary side liner 5. 46 and an inclined surface portion 47 for easily dropping the rough carried on the flat portion 46 toward the fixed liner 7 as the rotation proceeds in the circumferential direction by the rotation. On the periphery of the opening 44 of each storage recess 45, a ridge 48 continuous in a rectangular shape is provided. Each of the four sides of the ridge 48 of each storage recess 45 forms a part of a ridge (rotating tooth) that crushes the rough. And each storage recess 45
Is formed so as to protrude from the other side surface of the rotating disk 3 (see FIGS. 1 and 2).

Further, on the surface of the fixed side liner 7, as shown in FIG. 4, a large number of ridges (fixed teeth) 50 extending radially from the center of the liner 7 are formed. Each ridge 5
Numeral 0 is a tooth (fixed tooth) for crushing the rough, and the rough crushed by each ridge 50 and having a reduced particle size is guided outward in a recess 68 formed between two adjacent ridges 50. It is supposed to be. On the surface of the fixed-side liner 7, a plurality of strips extending continuously or discontinuously in the circumferential direction at a plurality of radial positions having different radii, and extending at least continuously at the lowermost side on the outermost peripheral side. Are formed.

The protruding portions 51 to 54 are located substantially in the lower half of the fixed-side liner 7 and are circumferentially continuous at different radial positions. These convex portions 51 to 54 are
It is provided in order to further reduce the particle size of the ore falling through the recess 68 between the ridges 50. for that reason,
It is preferable that the height of each of the protrusions 51 to 54 is gradually increased from the inner protrusion 51 to the outer protrusion 54. The convex portion 55 is provided in the guide passage 3 so as to prevent the crushed ore having a small particle diameter from entering the guide passage 39.
Nine arcuate openings 43 are continuously provided along the inner peripheral arcuate edge of the arcuate opening 43 and the horizontal edge of the outlet 42 thereof.

The protruding portions 56 to 58 are provided to reduce the particle diameter of the rough stone falling through the recess 68 between the protruding ridges 50 similarly to the protruding portions 51 to 54, In order to prevent the sand that has entered the area without the convex parts 52 and 53 after being crushed by a part of the part 51 (the lower right area in FIG. 4) from jumping out, it is also provided to prevent these sands. Have been. Therefore, it is preferable that the height of each of the protrusions 56 to 58 is gradually increased from the inner protrusion 56 to the outer protrusion 58. The remaining protrusions 59 and 60 extend discontinuously in the circumferential direction, and, like the protrusions 51 to 54, reduce the particle diameter of the ore falling through the recess 68 between the protrusions 50. The projection 52 is provided to reduce the size.
In order to prevent the sand that has entered the area without the protrusions 51, 53 and 54 after being crushed by a part of the area (the upper left area in FIG. 4) from jumping out, the sand is also prevented. Is provided. Therefore, it is preferable that the height of the protrusions 59 and 60 be larger than the height of the protrusion 52.

The surface of the rotary side liner 5 is
As shown in FIG. 1, a number of ridges 61 are provided as rotating teeth for crushing a rough stone. These ridges 61 are formed in each of a plurality of regions (in this example, eight regions divided into eight in the circumferential direction) obtained by dividing the surface of the rotation-side liner 5 in the circumferential direction. It includes a plurality of parallel ridges 61 formed to extend in a direction different from the ridge 61. Specifically, a plurality of ridges 6 in each of the eight divided areas
1 is inclined by approximately 45 ° with respect to a plurality of ridges 61 in an adjacent region. As a result, the ridges 61 of the two regions symmetric with respect to the center of the rotation side liner 5 are parallel to each other. By providing a large number of ridges 61 having different directions on the surface of the rotating side liner 5 in this manner, the rough is more reliably caught by the ridges, and the crushing and crushing of the rough are performed efficiently. It is possible to obtain sand without corners having a more uniform particle size.

In the sand manufacturing apparatus of the present embodiment thus configured, the four hydraulic hoists 25, 26 of the distance adjusting means 24 are provided.
Is operated to adjust the distance between the two liners 5 and 7 to a predetermined size by hydraulic pressure, and the motor 2 is driven to rotate the rotating disk 3 and the rotating liner 5, and the hopper 37 is rotated.
When the raw stone which is a raw material of sand is supplied from the inlet, the raw stone is guided by the inclined surface 38 of the guide passage 39 provided in the fixed-side disk 6 and the fixed-side liner 7, and the outlet 42 is opened on the surface of the fixed-side liner 6. The raw stone sent to the outlet 42 collides with a number of the ridges 61 of the rotating rotary side liner 5 repeatedly, and the raw stone is sequentially crushed and reduced by the collision.

When the openings 44 of the four storage recesses 45 sequentially coincide with the outlet 42 of the guide passage 39 due to the relative rotation of the two liners 5 and 7, a part of the rough at the outlet 42 is pushed by the rough at the rear. Then, it is discharged and stored in each storage recess 45 that matches the outlet 42. The ore stored in the storage recess 45 is carried in the circumferential direction by the rotation of the rotation side liner 5, and during that time, it is repeatedly crushed and reduced by the respective ridges 50 of the fixed side liner 7. The rough stone reduced in each storage recess 45 is guided by the inclined surface 47 as the inclined surface portion 47 of each storage recess 45 faces downward from the flat surface portion 46, and is guided between the two liners 5 and 7 from within each storage recess 45. Falling into the gap.

The rough falling in the gap is the fixed side liner 7
The concave portions 68 formed between the adjacent convex ridges 50 and the concave portions 69 formed between the adjacent convex ridges 61 of the rotating side liner 5 are matched by the relative rotation of the two liners 5, 6.
9 and collides with the respective ridges 61 and 50 of both liners 5 and 7 sequentially by the relative rotation within the gap, and is repeatedly crushed and further reduced while rolling due to the collision.

The reduced ore enters the gap (the smallest gap between the two liners) formed between one of the ridges of the two liners 5 and 7 and the other ridge. In the inside, the ridges 61 and 50 of the two liners 5 and 7 are crushed by the relative rotation and fall into small particles (sand) having a small particle diameter.

As described above, a part of the ore supplied from the hopper 37 and sent to the outlet 42 of the guide passage 39 is crushed and reduced at the outlet 42 and enters the gap between the two liners 5 and 7. The ore that has entered the gap is repeatedly crushed and reduced while rolling in the gap formed by the concavities 69 and 68 of the two liners 5 and 7, and finally the ridges of the two liners 5 and 7 are formed. In the smallest gap formed between 61 and 50, it is crushed by opposing ridges and falls as sand having a small particle size. Therefore, the grain shape of the dropped sand becomes substantially uniform and has no corners. The fixed disk 6 is displaced in the direction of the rotation axis to adjust the gap between the two liners 5 and 7 (that is, the gap between the ridges 61 and 50 of both liners) to obtain sand having a desired particle size. be able to.
Therefore, according to the sand manufacturing apparatus of the present example, it is possible to obtain sand having a uniform grain size and a small particle diameter, that is, sand close to natural sand, without damaging a hose for feeding the obtained sand or the like. .

Further, according to the sand manufacturing apparatus of this embodiment, a part of the rough stone sequentially sent to the outlet 42 of the guide passage 39 is converted into each storage recess 45 by the relative rotation of the two liners 5 and 7. The rough stone is stored in the storage recess 45 corresponding to each of the protrusions 6 of the rotary side liner 5 at the outlet 42.
1 are crushed sequentially by collision with
The ore stored in the inside 5 is also sequentially crushed by collision with each of the ridges 50 of the fixed side liner 7, so that the ore supplied from the hopper 37 can be dispersed and crushed efficiently.

Since the guide passage 39 is inclined downward toward the outlet 42 opening toward the surface of the fixed-side liner 7, the ore supplied from the hopper 37 is used to take advantage of the inclination. It can be sent to the side smoothly.

The ore reduced in size in each of the storage recesses 45 is formed by the inclined surface 47 of each storage recess 45 having its flat surface 46.
As it goes downward, it is guided by the inclined surface portion 47 and falls from the inside of each storage recess 45 into the gap between the two liners 5 and 7, so that the rough stone reduced in each storage recess 45 is sequentially put into the gap. I can send it out well.

According to the sand manufacturing apparatus of the present embodiment, the direction of the ore charged from the hopper 37 is different between the two liners 5 and 7 in each region formed on the surface of the rotary side liner 5. Since it is crushed by repeatedly colliding with many ridges 61 and crushed by repeatedly colliding with many ridges 50 extending radially formed on the surface of the fixed side liner 7, such crushing causes The resulting sand grains can be made more uniform and have no corners.

Further, according to the sand manufacturing apparatus of this embodiment, the surface of the liner 7 provided on the fixed disk 6 is continuously or discontinuously circumferentially arranged at a plurality of radial positions having different radii. And a plurality of strip-shaped projections 51 to 60 extending at least continuously on the outermost periphery side are provided.
The ore sent from the outlet 42 of the guide passage 39 between the two liners 5 and 7 first collides with the ridges 50 and 61 and is crushed and crushed. Proceeds toward the outer circumferential direction of the rotating disk 3, particularly downward, and in the process, sequentially passes through the convex portions 51 to 60. And the ridge 61 of the liner 5 of the rotating disk 3 crushes the sand, so that sand with a uniform grain size and no corners is obtained.

Since at least the outermost side of the projections 51 to 60 is provided with a belt-like projection 54 extending at least continuously on the lower side, the crushed and crushed rough stone (sand) is necessarily provided. Since it passes through the belt-shaped convex portion 54, it is possible to prevent sand having a diameter larger than a desired particle diameter from falling.

[0044]

As described above, according to the sand producing apparatus of the present invention, sand having uniform grain shape and no corners, that is, sand close to natural sand can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of an embodiment of a sand production device according to the present invention.

FIG. 2 is a front view of the sand production apparatus shown in FIG.

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a front view of a fixed-side liner used in the sand manufacturing apparatus shown in FIG.

FIG. 5 is a perspective view of a rotating side liner used in the sand manufacturing apparatus shown in FIG.

FIG. 6 is a front view showing a conventional sand manufacturing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sand manufacturing apparatus 2 Motor 3 Rotation-side disk 5 Rotation-side liner 6 Fixed-side disk 7 Fixed-side liner 37 Hopper 38 Inclined surface 39 Guide passage 42 Outlet 44 Opening 45 Storage recess 50, 61 Ridge 51, 60 Belt-shaped convex 68, 69 recess

Claims (2)

(57) [Claims] 1. A rotating disk which is rotatably supported and rotates by receiving a driving force from a motor, and a fixed disk which is displaceably supported in the direction of the rotation axis of the disk with one side thereof facing each other. Arranged, a liner made of a material harder than the rough stone which is a raw material of sand is provided on opposing surfaces of the rotating side disk and the fixed side disk, and a plurality of ridges are formed on the surfaces of both liners. In the fixed-side disk and the liner provided on one side thereof, an outlet opening the surface side of the liner provided on the fixed-side disk with a rough stone supplied from a hopper disposed on the other side of the fixed side disk. A guide passage is provided for guiding between the rotating side disk and the fixed side disk by guiding the inclined side to the side, and the rough supplied between the two liners from the hopper is provided on the fixed side disk. On the rotating disk that rotates with the strip The ridge of the liner provided is configured to be crushed and crushed , and further, the rotating side disk and
On the liner provided on one side, on the surface of the liner,
Opened on the liner of the fixed disk during rotation of the rotating disk
Opened at a position that matches the exit of the guide passage
Having an opening that matches the outlet of the guide passage
Storage recess for storing rough stone discharged from the guide passage
Sand production apparatus, wherein a is provided. 2. The surface of a liner provided on the fixed disk.
Is circumferentially continuous at multiple radial positions with different radii
Extend continuously or discontinuously, and the lower side is
At least a plurality of strip-shaped protrusions extending continuously.
The sand manufacturing apparatus according to claim 1, wherein