JP7027930B2 - Crusher - Google Patents

Description

The present invention relates to a crusher.

When casting metal, for example, a mold formed by adding a binder to casting sand is used. The molded mold is destroyed when the casting is taken out. The destroyed mold constitutes a sand mold. The foundry sand can be reused by crushing the sand slag and removing the binder adhering to the foundry sand.

For example, Patent Document 1 discloses a crushing device that crushes sand by colliding with each other. The apparatus disclosed in Patent Document 1 includes an upper blade and a lower blade arranged so as to face each other. First, by colliding the sand shavings with each other, the sand shavings are crushed until it becomes smaller than the gap between the upper blade and the lower blade. The sand gala crushed until it becomes smaller than the gap between the upper blade and the lower blade enters the gap between the upper blade and the lower blade and is further crushed.

Jitsukaisho 60-28946 Gazette

The inventors have found the following problems with respect to the crusher.

Sand molds vary in size because they are produced by breaking the mold. Large sand shavings take longer than small sand shavings to crush by colliding with each other. Therefore, when a large amount of sand is contained, the time required for crushing is longer than when a large amount of sand is not contained. That is, even if the amount of sand is the same, the time required for crushing differs depending on the size of the sand.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a crushing device capable of crushing a certain amount of sand shavings per fixed time.

One aspect for achieving the above object is a crushing device for crushing sand shavings using an upper blade and a lower blade arranged so as to face each other, wherein the upper blade is provided and the upper blade is rotatable and rotatable. The lower plate is provided with an upper plate that can move up and down and a lower plate that is provided with the lower blade and has a mesh structure or a multi-hole structure. The placed sand scraper is discharged from the lower plate while being cut by the upper blade.

In the crushing apparatus according to the present invention, by moving the upper plate up and down while rotating it, the sand glass placed on the lower plate is cut by the upper blade and discharged from the lower plate. Therefore, regardless of the size of the sand shavings, a certain amount of sand shavings can be crushed per fixed time.

According to the present invention, it is possible to provide a crushing device capable of crushing a certain amount of sand shavings per fixed time.

It is a perspective view of the crushing apparatus which concerns on this embodiment. It is sectional drawing which follows the II-II line of FIG. It is a partially enlarged perspective view of the upper plate. It is a partially enlarged perspective view of the lower plate.

Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiments. Further, in order to clarify the explanation, the following description and drawings are appropriately simplified.

First, the configuration of the crushing device according to the embodiment of the present invention will be described with reference to FIGS. 1 and 2.
FIG. 1 is a perspective view of a crushing device according to the present embodiment. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. As shown in FIG. 1, the crushing device 1 includes a crushing chamber 4, a rotary shaft 5, a pulley 61, a belt 62, a pulley 63, a base 64, a speed reducer 71, a motor 72, and a frame 8. As shown in FIG. 2, the crushing device 1 includes an upper plate 2 and a lower plate 3 in addition to the configuration shown in FIG. In addition, in FIG. 2, the sand gala 9 is also shown.

As a matter of course, the right-handed xyz orthogonal coordinates shown in FIG. 1 and other drawings are for convenience to explain the positional relationship of the components. Normally, the z-axis positive direction is vertically upward, and the xy plane is a horizontal plane, which is common between drawings.

As shown in FIG. 2, the upper plate 2 and the lower plate 3 are disks arranged so as to face each other. The upper plate 2 and the lower plate 3 are stored in the crushing chamber 4. The crushing chamber 4 includes a lid plate 41, a side wall 42, and a bottom plate 43. The side wall 42 is, for example, a tubular member having a circular cross section. A bottom plate 43 is joined to the lower end of the side wall 42. A lid plate 41 is joined to the upper end of the side wall 42.

The lower plate 3 is fixed to the upper surface of the bottom plate 43. Sand glass 9 is placed on the upper surface of the lower plate 3. The sand mold 9 is produced by breaking the mold when removing the casting. Therefore, the sand gala 9 is composed of cast sand and a binder. The side wall 42 may be provided with a slot (not shown). By charging the sand glass 9 from the input port of the side wall 42, the sand glass 9 can be placed on the upper surface of the lower plate 3.

A rotation shaft 5 is connected to the center of the upper surface of the upper plate 2. The upper plate 2 can rotate about the rotation shaft 5. Further, the upper plate 2 can slide in the vertical direction along the inner peripheral surface of the side wall 42. The rotating shaft 5 penetrates the base 64 and the lid plate 41.

As shown in FIG. 1, the rotating shaft 5 is connected to the pulley 63. The rotation shaft 5 rotates with the rotation of the pulley 63. As shown in FIG. 1, the pulley 63 is connected to the pulley 61 by a belt 62. The pulley 61 is connected to the speed reducer 71. The speed reducer 71 is connected to the motor 72. As shown in FIG. 1, the pulley 63 is mounted on the upper surface of the table 64.

The torque of the motor 72 is converted into a predetermined torque in the speed reducer 71. The pulley 61 rotates with the torque converted in the speed reducer 71 as the motor 72 is driven. Since the pulley 63 is connected to the pulley 61 by the belt 62, the pulley 63 rotates with the drive of the motor 72. Therefore, the rotating shaft 5 rotates with the driving of the motor 72. That is, the torque of the rotating shaft 5 can be adjusted by adjusting the output of the motor 72.

As shown in FIG. 1, the pulley 63 and the base 64 are housed in the frame 8. As shown in FIG. 1, the rotation shaft 5 penetrates the upper end of the frame 8. The upper end of the rotating shaft 5 is connected to, for example, a piston (not shown). The rotation shaft 5 can move up and down with the movement of the piston. That is, the rotating shaft 5 can move up and down by the movement of the piston while rotating by the drive of the motor 72. Further, the rotation shaft 5 may be moved up and down by using a ball screw connected to the motor 72. The ball screw can move the rotation shaft 5 up and down as the motor 72 is driven.

Next, the structure of the upper plate 2 will be described with reference to FIG. FIG. 3 is a partially enlarged perspective view of the upper plate 2. As shown in FIG. 3, an upper blade 21 is provided on the lower surface of the upper plate 2. As shown in FIG. 3, the upper blade 21 is, for example, a row-shaped blade having a triangular cross section. The shape of the upper blade 21 may be appropriately changed according to the hardness and size of the sand glass 9. For example, the shape of the upper blade 21 may be the tooth shape of a shark.

Next, the structure of the lower plate 3 will be described with reference to FIG. FIG. 4 is a partially enlarged perspective view of the lower plate 3. As shown in FIG. 4, a lower blade 31 is provided on the upper surface of the lower plate 3. As shown in FIG. 4, the lower blade 31 is, for example, a row blade having a triangular cross section. Since the upper blade 21 is provided on the lower surface of the upper plate 2 and the lower blade 31 is provided on the upper surface of the lower plate 3, the upper blade 21 and the lower blade 31 are arranged to face each other.

As shown in FIG. 4, the lower plate 3 has, for example, a multi-hole structure in which a plurality of through holes 32 are provided in the gaps between the lower blades 31. Although the details will be described later, the crushed sand glass 9 is discharged from the lower plate 3 through the plurality of through holes 32. Therefore, it is desirable that the bottom plate 43 is provided with an opening through which the sand waste discharged from the lower plate 3 can pass.

The shape of the lower plate 3 may be any shape as long as the lower blade 31 can be provided on the upper surface of the lower plate 3. The shape of the lower plate 3 may be, for example, a mesh structure such as a wire mesh. Further, in the lower plate 3 shown in FIG. 4, a plurality of through holes 32 are arranged so as to be aligned along the x-axis direction. However, the position where the plurality of through holes 32 are arranged is not particularly limited.

A belt conveyor (not shown) may be arranged under the bottom plate 43, for example. The sand glass 9 discharged from the lower plate 3 through the plurality of through holes 32 is placed on the belt of the belt conveyor. When the belt conveyor drives the sand galley 9 placed on the belt, it is carried to a predetermined place.

When crushing the sand glass 9, first, the sand glass 9 is placed on the upper surface of the lower plate 3 as shown in FIG. Next, by driving the motor 72 and the piston, the rotating shaft 5 is moved up and down while rotating. That is, the upper plate 2 is moved up and down while rotating. The sand glass 9 is cut by the upper blade 21 when the upper plate 2 is lowered while rotating. When rotating the upper plate 2, the rotation is usually started with a small torque, and the torque is gradually increased to a predetermined torque.

When the upper plate 2 is lowered, the sand glass 9 is sandwiched by the upper plate 2 and the lower plate 3. When the upper plate 2 is rotated while sandwiching the sand glass 9, the lower blade 31 is provided on the upper surface of the lower plate 3, so that the sand glass 9 exerts a force in the direction opposite to the rotation direction of the upper plate 2 on the lower blade. Receive from 31. Therefore, by rotating the upper plate 2, the sand glass 9 can be cut by using the upper blade 21 and the lower blade 31.

The cut sand galley 9 passes through the gap between the sand galleys 9 and is discharged from the lower plate 3 through the plurality of through holes 32. That is, only the sand glass 9 that has been cut until it becomes smaller than the plurality of through holes 32 is discharged. Therefore, by using the crushing device 1 according to the present embodiment, the size of the sand scraper 9 can be made uniform to a predetermined size or less. By appropriately changing the size of the plurality of through holes 32, the size of the sand glass 9 can be made uniform to a predetermined size.

Further, in the lower plate 3 shown in FIG. 4, a plurality of through holes 32 are provided on the entire upper surface of the lower plate 3. Therefore, for example, the cut sand glass 9 can be discharged faster than when a plurality of through holes 32 are provided in a part of the upper surface of the lower plate 3.

In the crushing device 1 according to the present embodiment, the cut sand glass 9 is discharged straight down through the plurality of through holes 32. Therefore, it is possible to suppress the dispersal of the cut sand glass 9. Further, since it is not necessary to provide a mechanism for collecting the scattered sand waste 9, the crushing device 1 can be miniaturized.

Further, in the crushing device 1 according to the present embodiment, since the sand glass 9 is cut by moving the upper plate 2 up and down while rotating, it is constant per fixed time regardless of the size of the sand glass 9. A large amount of sand glass 9 can be cut. Therefore, the time required for the step of crushing the sand gala 9 can be kept constant. Further, since the sand glass 9 is cut in the crushing chamber 4, the operation noise is smaller than that in the case of crushing the sand glass 9 in a place without a cover.

According to the invention according to the present embodiment described above, it is possible to provide a crushing device capable of crushing a certain amount of sand shavings per fixed time.

The present invention is not limited to the above embodiment, and can be appropriately modified without departing from the spirit.

1 Crushing device 2 Upper plate 21 Upper blade 3 Lower plate 31 Lower blade 32 Through hole 4 Crushing chamber 41 Cover plate 42 Side wall 43 Bottom plate 5 Rotating shaft 61 Pulley 62 Belt 63 Pulley 64 units 71 Reducer 72 Motor 8 frame 9 Sand Gala

Claims (1)

It is a crushing device that is composed of cast sand and a binder using the upper and lower blades arranged facing each other, and crushes the sand mold generated by breaking the mold when the casting is taken out. ,
The upper blade is provided, and the upper plate that can rotate and move up and down,
The lower blade is provided, and a lower plate having a mesh structure or a multi-hole structure is provided.
By moving the upper plate up and down while rotating it, the sand glass placed on the lower plate is discharged from the lower plate while being cut by the upper blade.
It ’s a crusher ,
The upper blade is a row-shaped blade having a triangular cross section.
The lower blade is a crushing device that is a row-shaped blade having a triangular cross section .

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