JPS6219390Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a casting sand recovery device that separates casting sand and casting sand lumps adhering to casting flasks and cast products, and crushes the casting sand lumps to recover casting sand. It is something.

Conventionally, this type of sand recovery equipment consists of a sand separator that separates sand and sand blocks adhering to flasks and cast products, and a sand lump that crushes sand blocks and recovers sand. Since the equipment was constructed with a crushing device and two different types of equipment were combined, the equipment cost was high, and there were problems in that the number of dust generation locations increased and the area occupied increased. Therefore, in order to solve this problem, the inventors developed a casting sand separation and recovery device (Utility Application No. 56-172350) that integrated the functions of separating casting sand and crushing sand blocks, as shown in Figure 1.
) has already been proposed. In the figure, 1 is a receiving box in which the inner bottom surface 2 is inclined downward from the rear end to the front end, and the rear end of the receiving box 1 is loaded with a casting flask with casting sand attached and a cast product X. A projecting body 3 whose top surface is horizontal is protruded to remove casting sand S and casting sand blocks from the casting flask and cast product X.
A casting sand separation section 4 is provided to separate the SB,
A vertical wall 6 is formed in the front part of the receiving box 1 by extending the front side wall 5 upward and bending its upper end vertically or backwardly, and serves as a sand block crushing section for storing and crushing sand blocks SB. 7 is provided. Note that the protrusion 3 may be an intermittent rib, or may be a protrusion of a large number of rods. This receiving box 1 is attached to a fixed base 8 via a large number of compression springs 9, and two vibration motors 10 each having an eccentric weight attached to a rotating shaft are installed at the center or both sides of the outer bottom surface of the receiving box 1. is suspended to form a vibration means. Note that this vibration means may be formed using an eccentric cam. 11
is a casting sand discharge hole bored in the front wall 5 of the receiving box 1, and through this casting sand discharge hole 11, the finely divided casting sand S is discharged onto the conveyor 12 and sent to the next process.

Now, the flasks and cast products X with casting sand S attached are being supplied from the rear upper part of the receiving box 1.
When the vibration motor 10 to which the eccentric weight is attached is rotated to vibrate the receiving box 1 in the vertical direction or diagonally vertical direction (direction perpendicular to the inner bottom surface 2), the upper surface of the protrusion 3 of the casting sand separating section 4 The placed cast flask and cast product
SB can be separated efficiently, and the separated casting sand S and casting sand lump SB are formed into protrusions 3.
The sand S, which is sufficiently finely divided, is transported toward the front end of the receiving box 1 by the transport action of the inner bottom surface 2 which is inclined through the space, and is discharged through the sand discharge hole 11. On the other hand, the sand block SB which is insufficiently subdivided is pushed up along the inner surfaces of the front wall 5 and the vertical wall 6 by the pushing up action of the subsequent casting sand S and the sand block SB, and then is pushed up along the inner surface of the front wall 5 and the vertical wall 6. Due to the vibration action, a downward vibration force in the opposite direction is applied, and the sand blocks SB are rubbed against each other and are efficiently divided into pieces. As mentioned above, in the case of the casting sand separation and recovery device shown in Fig. 1,
Since the casting sand separating section 4 and the casting sand lump crushing section 7 formed at the rear and front parts of the receiving box 1 are driven by the same vibration means, that is, the vibration motor 10, the equipment cost is reduced, and This has the effect of saving energy, increasing the degree of sealing, making it easier to take measures against dust, and making the entire device more compact and occupying less space. However, in such conventional examples, sufficiently finely divided casting sand S and insufficiently finely divided casting sand blocks SB are transferred to the casting sand block crushing section 7 in a mixed state, and the sand blocks SB are buffered by the casting sand S. There was a problem that the crushing efficiency in the casting sand block crushing section 7 deteriorated depending on the use. In other words, the finely divided casting sand S is a lump of casting sand.
When mixed in the SB, there was a problem in that the vibration energy transmitted to the sand block SB was attenuated, resulting in poor crushing efficiency and a reduction in the sand recovery ability. The present invention was developed in view of the above points, and its purpose is to improve the efficiency of crushing sand blocks by providing a sand separation plate to quickly separate the casting sand from the sand blocks. An object of the present invention is to provide a casting sand recovery device which improves the casting sand recovery ability and increases the casting sand recovery ability.

Examples will be described below using figures. Second
The figure and FIG. 3 show an embodiment of the present invention.
The construction of the sand separation section 4 and the sand block crushing section 7 formed at the front and rear of the receiving box 1 and the vibration means consisting of the vibration motor 10 are the same as those of the conventional example shown in FIG.
Separation of the foundry sand and crushing of the foundry sand blocks are carried out in the same way. Here, the feature of the present invention is that a sand separation plate 15 is provided at an appropriate distance from the inner bottom surface 2 of the receiving box 1.
The casting sand separation plate 15 is made of punched metal with a large number of pores 16 formed on the entire surface or in the main part (for example, the front part) through which the finely divided casting sand S passes. A gap between the inner bottom surface 2 of the receiving box 1 and the sand separation plate 15 is used as a sand drainage channel 17. Reference numeral 18 denotes a casting sand discharge port formed in a portion of the front wall 5 of the receiving box 1 corresponding to the casting sand discharge passage 17. Note that this casting sand outlet 18 may be provided on the left and right side walls of the front portion of the receiving box 1. In addition, the casting sand separation plate 15
is attached removably to avoid wear, and the pore 1
The hole diameter of No. 6 is set to 5 to 20 mm in order to crush the casting sand block SB to the size of sand grains. In addition, the casting sand separation plate 15 is not only made of punched metal, but also one made by boring a large number of pores into a metal plate, a combination of punched metal and a metal mesh, and a metal plate with slit-like pores. You may also use something like this.

Now, when the receiving box 1 is vibrated in the vertical direction by the vibration motor 10, the casting sand S and the casting are removed from the casting flask and the cast product Sand block SB is separated and cast sand separation plate 15
The casting sand S further falls into the casting sand discharge passage 17 through the pores 16. The casting sand S that has fallen into the casting sand discharge path 17 is transferred to the front end along the sloping inner bottom surface 2 of the receiving box 1 due to the application of vertical vibration, and sequentially passes through the casting sand discharge port 18 to the conveyor 12. It is discharged to the top. On the other hand, the sand block SB remaining on the sand separation plate 15 is transferred on the sand separation plate 15 toward the front end of the receiving box 1, and is accumulated in the sand block crushing section 7, causing forward vibration force and the front side wall. 5 and the vibration force in the opposite direction from the vertical wall 6, the vibration force applied to the sand blocks SB increases, and the sand blocks SB are rubbed against each other and crushed. The casting sand S, which has been sufficiently finely divided to the size of sand grains, passes through the pores 16 of the sand separation plate 15 and successively falls into the sand discharge passage 17 and is discharged through the sand discharge port 18. in this case,
Since the casting sand S is quickly discharged, the casting sand S and the casting sand lump are
SB is not transferred to the sand block crushing section 7 in a mixed state, and vibration energy or falling impact is directly transmitted to the sand block SB, and the buffering effect of the casting sand S is reduced as in the conventional example. This makes it possible to prevent a decrease in the crushing efficiency of the casting sand block crushing section 7 due to this.
In addition, since core metal, cold metal, cast products, etc. accumulate on the sand separation plate 15, it is possible to prevent troubles such as clogging of the casting sand outlet 18 with these objects, and it is also easy to collect them. It is becoming possible to do this.

FIG. 4 shows another embodiment, in which a dust-proof type vibration motor 10 is used to form the vibration means, and the vibration means is provided at the bottom of the receiving box 1, and the vibration means is installed at an angle perpendicular to the inner bottom surface 2. The receiving box 1 is made to vibrate in the vertical direction.

As mentioned above, the present invention consists of a plurality of protrusions for placing casting flasks and cast products with casting sand adhered to the rear part of the receiving box, which is arranged so that the inner bottom surface is tilted downward from the rear end to the front end. By protruding from the bottom surface of the body, a sand separating section is formed to separate casting sand and casting sand lumps from the casting flask and cast products. By bending the upper end vertically or backwards to form a sand block crushing section that stores and crushes the sand block, and by providing a vibration means that vibrates the receiving box vertically or diagonally up and down, the sand can be separated. This is a casting sand recovery device in which both the casting sand block crushing section and the casting sand block crushing section are driven by the same vibration means, and the casting sand recovery device has a large number of pores perforated throughout the entire surface or in the main part to allow finely divided casting sand to pass through. A sand separation plate is arranged at an appropriate distance from the inner bottom of the receiving box, and the gap between the inner bottom of the receiving box and the casting sand separating plate is used as a casting sand discharge path, and the casting sand on the front side wall of the receiving box is removed. A sand discharge port is formed in the part corresponding to the discharge path, and a sand separation part is formed at the rear of the receiving box to separate the casting sand and sand blocks from the flask and cast products. A sand block crushing section is formed in the front part of the box to store and crush sand blocks, and a vibration means is provided to vibrate the receiving box vertically or diagonally up and down to create a sand separation section and a sand block crusher. Since the parts are driven by the same vibrating means, the vibrating means can be shared, which simplifies the configuration and makes the entire device more compact, as well as saving energy and reducing costs.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a conventional example of a casting sand recovery device according to the present invention, Fig. 2 is a cross-sectional view of an embodiment of the present invention, and Fig. 3 is a cross-sectional view of a conventional example of a casting sand recovery device according to the present invention.
The figure is a top view of the same as above, and FIG. 4 is a sectional view of another embodiment. 1 is a receiving box, 2 is an inner bottom surface, 4 is a sand separation section, 5 is a front wall, 7 is a sand crushing section, 10 is a vibration motor, 1
5 is a casting sand separation plate, 16 is a pore, 17 is a casting sand outlet, and 18 is a casting sand outlet.

Claims (1)

[Scope of utility model registration request] 1. A plurality of protrusions protrude from the bottom surface of the receiving box, the inner bottom surface of which is tilted downward from the rear end to the front end, at the rear of which a casting flask with casting sand or a cast product is placed. By doing so, a sand separation part is formed to separate the casting sand and the casting sand block from the casting flask and the cast product, and at the same time, a front side wall is extended upward in the front part of the receiving box, and the upper end thereof is vertically or rearwardly extended. A sand block crushing section is formed by bending to store and crush sand blocks, and a vibration means for vibrating the receiving box vertically or diagonally up and down is provided to create a sand separation section and a sand block crushing section. This is a casting sand recovery device in which a casting sand separation plate is driven by the same vibration means, and a casting sand separation plate with a large number of pores through which the finely divided casting sand passes through the entire surface or main part is installed in the receiving box. The gap between the inner bottom surface of the receiving box and the casting sand separation plate is arranged at an appropriate distance from the inner bottom surface, and the gap between the inner bottom surface of the receiving box and the casting sand separation plate is used as a casting sand discharge passage, and the part of the front side wall of the receiving box corresponding to the casting sand discharge passage is A casting sand recovery device formed with a casting sand discharge port.