JPH0670941U - Secondary sand crusher - Google Patents

Abstract

(57) [Summary] [Purpose] In a foundry sand recovery line of a foundry, small sand lumps on the sieve after sieving the primary crushed sand are efficiently crushed to the secondary crushed sand and crushed sand. Gala can be automatically discharged. [Structure] A vibrating box 3 having an inclined bottom wall 3a and a screen 5 provided on a pedestal 1 via a spring 2, a vibration motor 4 for vibrating the vibrating box 3, and a front side wall of the vibrating box. The lump of sand that is provided on the screen 5 of the vibrating box 3 is crushed into sand by the vibration of the screen 5, and the sand discharge port 9 and the sand discharge port 8 are provided on the screen 3b. Pass through to the outside of the box, and
The waste remaining on the screen 5 is discharged to the outside of the box through the waste discharge port 8.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a sand lump secondary disintegrator used in a foundry sand recovery line of a foundry.

[0002]

[Prior art]

 In a foundry, in order to granulate and collect the sand lumps that had formed the mold after casting, the product and the sand lumps were separated by frame separation, and the separated sand lumps are shown in Fig. 3. It is collected by such a process. That is, the lump of sand is first crushed by a crusher consisting of a crusher to form sand particles, and the obtained sand particles are transferred to a vibrating screen by a bucket elevator, and the sand particles are sieved by the vibrating screen, and the predetermined grains under the sieve are sieved. Sand less than the diameter is collected through the hopper and bucket conveyor. Discard all on the sieve of the vibrating crane.

[0003]

[Problems to be solved by the device]

 As described above, when the primary crushed sand is sieved by the vibrating screen, it was conventionally discarded on the sieve. However, on this sieve, in addition to burrs and brick debris, a considerable amount of small sand lumps are present. It is extremely uneconomical to dispose of such small sand blocks without reusing them, and it is expensive to dispose of them. It has become difficult to dispose. Although some small sand lumps on the sieve are returned to a crusher consisting of crushers and crushed again, the efficiency of crushing is poor because the amount of crushers returned to the crusher is large.

Therefore, as shown in the process diagram of FIG. 4, a hammer crusher as a secondary disintegrator and a second vibrating screen are installed next to the vibrating screen, and the small sand lumps on the sieve of the vibrating screen are hammered by the hammer. In some cases, the sand is crushed by a crusher and then the secondly crushed sand is sieved by a second vibrating screen to recover sand having a particle size of a predetermined value or less. However, with this method, the crushing efficiency with a hammer crusher is poor, and the sand recovery rate is low at about 70%, so it is necessary to screen again after crushing. Therefore, it is necessary to install a bucket elevator and the like to return the second vibrating screen and the bottom of the screen to the hopper, which causes a problem of increase in equipment cost.

In Japanese Utility Model Publication No. 1-14376, a flask is placed on a vibrating box, the mold in the flask is disintegrated and dropped onto a grate in the vibrating box, and the sand particles that have passed through the grate are destroyed. There is disclosed a casting sand reclaiming device that discharges to the outside through a discharge pipe provided on one side wall of a vibrating box. However, with this device, the waste remaining on the grate must be manually discharged from the inside of the box, which requires a lot of labor and time. Had a problem that had to stop reclaiming sand.

Therefore, an object of the present invention is to solve the above-mentioned problems, efficiently secondary crush small sand lumps on a sieve after sieving the primary crushed sand with a vibrating screen, and It is not necessary to provide a separate vibrating screen to sieve the crushed material that has undergone secondary crushing, and the waste generated during secondary crushing can be automatically discharged without stopping the work. To provide a device that can.

[0007]

[Means for Solving the Problems]

 The device of this invention comprises a vibrating box having an inclined bottom wall provided on a pedestal via a spring and having an open upper end, and the vibrating box attached to the vibrating box. A vibration motor for vibrating in a tilting direction, a screen that partitions the inside of the vibration box in the vibration direction and is provided above the bottom wall at a predetermined interval, and a vibration on the upper end side of the tilted bottom wall. On the side wall of the box, there is a glass discharge port above the mounting position of the screen and a sand discharge port below the mounting position of the screen. The feature is that an inclined chute for discharging the waste is provided.

[0008]

[Action]

 According to the device of the present invention, the lumps of sand that have been primary crushed by the crusher composed of crushers are squeezed together by the vibration of the screen of the vibrating box, or by the rubbing due to the accumulated glass. It is rapidly crushed to become sand and falls on the bottom wall of the vibrating box, and is discharged outside the vibrating box through the sand outlet. Then, the glass remaining on the screen passes through the screen chute, passes through the glass discharging port, and is discharged to the outside of the vibrating box. Therefore, the sand lump can be efficiently crushed, and it is not necessary to provide a vibrating screen or the like for sieving the crushed material after crushing by the secondary crusher, and the debris generated during the secondary crushing, etc. Can be discharged automatically without stopping the work.

[0009]

【Example】

 Next, the device of the present invention will be described with reference to the drawings. FIG. 1 is a schematic perspective view showing one embodiment of the device of the present invention. As shown in the drawing, a vibrating box 3 is provided on a frame 1 via a spring 2. The vibrating box 3 has an inclined bottom wall 3a, and its upper end is opened so that the raw material can be supplied into the vibrating box. On the lower surface of the bottom wall 3a of the vibration box 3, a vibration motor 4 for vibrating the vibration box 3 in the direction of inclination of the bottom wall is provided.

A screen 5 is provided in the vibrating box 3 above the bottom wall 3a thereof at a predetermined distance. The screen 5 is composed of a horizontal screen body 6 and an inclined chute 7 for discharging glass. On the front side wall 3b of the vibrating box 3 located on the upper end side of the inclined bottom wall 3a, a glass discharge port 8 is provided above the attachment position of the chute 7 of the screen 5, and the chute 7 A sand discharge port 9 is provided below the mounting position. Reference numeral 10 is a glass discharging chute attached to the glass discharging port 8, 11 is a sand discharging chute attached to the sand discharging port 9, and 12 is a cleaning port provided on the upper side wall of the vibrating box 3. . The installation position of the glass exhaust port 8 is not limited to the front side wall 3b of the vibrating box 3, and may be provided above the front side wall 3b of the side walls 3c and 3d.

As shown in the schematic process diagram of FIG. 2, the lump of sand is first crushed by a crusher consisting of a crusher to form sand particles, and the obtained sand particles are transferred to a vibrating screen by a bucket elevator, and then vibrating screen. The above-mentioned sand particles are sieved by the above, and the sand below the predetermined grain diameter under the sieve is recovered through a hopper and a bucket conveyor. The sieving screen of the vibrating screen is fed from the upper end opening into the secondary sand crusher of the present invention shown in FIG.

The vibration motor 4 provided on the lower surface of the bottom wall 3a of the vibration box 3 is rotated toward the lower side of the tilted bottom wall 3a as shown by an arrow to vibrate the vibration box 3. As a result, the lumps of sand supplied to the screen 5 are rapidly crushed into sand by the vibration of the screen 5 or by the rubbing by the accumulated debris, and become sand, and the screen body 6 moves to the bottom wall of the vibrating box 3. It falls on 3a, passes through the sand discharge port 9 and the sand discharge chute 11, and is discharged to the outside of the vibration box.

The sand dropped on the bottom wall 3a of the vibrating box 3 is discharged through the sand discharge chute 11 from the sand discharge port 9 provided on the front side wall 3b, and as shown in FIG. It is returned to the bucket elevator provided after the crusher consisting of. In the device of this invention, as described above, the lump of sand is crushed by the vibration of the screen 5, and the crushed sand is recovered through the screen body 6, so the recovery rate of sand is about 90%. Extremely high.

As described above, when the sand lump is crushed by the screen 5, the amount of residual glass on the screen 5 is about 10%, which is small. When the residual amount exceeds a certain amount, it passes through the chute 7 of the screen 5, passes through the chute discharge port 8 and the chute 10 for discharging the chute, and is automatically discharged from the vibrating box 3. Therefore, there is no need for an operator or the suspension of operations for the emission of waste.

[0015]

As described above, according to the device of the present invention, the secondary crusher of the present invention is provided on the sieve of the vibrating screen of the sand lumps that are first crushed by the crusher composed of the crusher. Is efficiently crushed by the secondary crusher, and it is not necessary to install a vibrating screen for sieving the crushed material after crushing by the secondary crusher, and the waste generated during the secondary crushing is discharged. It has many industrially useful effects, such as being able to be performed automatically without interruption.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an embodiment of the device of the present invention.

FIG. 2 is a schematic process diagram showing a crushing process by the device of the present invention.

FIG. 3 is a schematic process diagram showing a crushing process by a conventional device.

FIG. 4 is a schematic process diagram showing a crushing process by another conventional device.

[Explanation of symbols]

 1 frame, 2 springs, 3 vibrating boxes, 3a bottom wall, 3b front side wall, 4 vibration motors, 5 screens, 6 screen bodies, 7 chutes, 8 flue discharge ports, 9 sand discharge ports, 10 trash discharge chutes, 11 Chute for sand discharge, 12 cleaning openings.

Claims (1)

[Scope of utility model registration request] 1. A vibrating box having an inclined bottom wall provided on a frame via a spring and having an open upper end, and an inclination of the bottom wall of the vibrating box attached to the vibrating box. A vibrating motor for vibrating in the direction, a screen that partitions the inside of the vibrating box in the vibrating direction and is provided above the bottom wall at a predetermined interval, and a front side wall on the upper end side of the inclined bottom wall. And a sand discharge port below the screen mounting position and a sand discharge port below the screen mounting position. A sand lump secondary disintegrator, which is provided with an inclined chute.