JP7311087B2 - Casting sand remover - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casting sand remover for dropping casting sand by giving an impact to a work containing casting sand.

Conventionally, as a device for removing casting sand from a cast work, for example, a configuration such as that disclosed in Patent Document 1 is already known. Such a device removes molding sand by impacting a work placed on a vertically movable support member with a striking piece to vibrate the work.

JP-A-2005-297057

However, in the configuration of Patent Document 1, there is still a problem that molding sand is incompletely removed. Specifically, in a cavity portion formed with an opening through which molding sand easily flows out, molding sand flows out from the opening and is relatively easily removed. Since it is difficult for the molding sand to flow out into the cavity, there is a problem that the molding sand tends to stay in the cavity.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a casting sand remover capable of efficiently removing casting sand.

The present invention is a casting sand remover for removing casting sand from a workpiece to be sand removed, and is a first coil spring portion that is arranged upright with respect to a base surface and extends and contracts in the vertical direction. a swinging frame portion provided at the upper end portion of the first coil spring portion; and a second coil spring portion arranged in an upright state with respect to the swinging frame portion and extending and contracting in a vertical direction. , a work support base provided at the upper end of the second coil spring portion for supporting the work; a work impact device for contacting and impacting the work; wherein the first coil spring and the second coil spring are in an elastically compressed state, and the work impacting device at least moves the work support base that supports the work The oscillating frame striking device imparts an impact force that vibrates in the vertical direction, and the oscillating frame striking device oscillates the oscillating frame portion in a direction other than the vertical direction while bending the first coil spring portion. A casting sand remover characterized by

In such a configuration, the sand can be removed by vibrating the work at least in the vertical direction by the work striking device. With such a configuration, the lumps of molding sand in the work collapse, and the collapsed molding sand flows out from the openings or the like formed in the work. Further, by hitting the swinging frame portion with the swinging frame striking device, the first coil spring portion supporting the swinging frame portion can be bent to swing the swinging frame portion. In this way, when the swing frame swings, fragments of the molding sand that have crumbled as described above fly into the surrounding cavities and are properly discharged from the workpiece.

Here, in the present invention, "deflecting the first coil spring portion" means distorting the axis of the first coil spring portion and swinging it in a direction other than the vertical direction (for example, the front-rear direction or the left-right direction). Point. As a result, the oscillating frame is oscillated in directions other than the vertical direction, and casting sand that could not be removed only by vertical vibration can be efficiently discharged and removed.

Further, there is proposed a configuration including swing range restricting means for restricting the swing range of the swing frame portion to a predetermined range.

With such a configuration, the swing range of the swing frame portion can be optimized. Therefore, it is possible to prevent the oscillating frame portion from excessively oscillating and adversely affecting, for example, the workpiece.

Further, there is proposed a configuration including a piercing member having a pointed tip and a piercing member advance/retreat means for advancing and retreating the piercing member with respect to the work.

By adopting such a configuration, it is possible to crush the sand by directly piercing the sand that has adhered to the hole formed in the work with the piercing member.

As described above, according to the casting sand remover of the present invention, an excellent effect of efficiently removing casting sand can be obtained.

It is an explanatory view showing a casting sand remover. FIG. 5 is an explanatory diagram of the casting sand remover showing a state in which the swing frame portion is swinging; FIG. 5 is an explanatory diagram of the casting sand remover showing a state in which the swing frame portion is swinging; (a) is an explanatory diagram showing a work filled with molding sand, and (b) is an explanatory diagram showing a state in which the molding sand collapses. FIG. 4 is an explanatory view showing a piercing member advancing/retreating means having a piercing member;

An embodiment of the present invention will be described with reference to the accompanying drawings.
As shown in FIG. 1 , the casting sand remover 1 includes a first coil spring portion 11 . Here, the first coil spring portion 11 is arranged on the floor portion GL, which is a horizontal base surface, and extends and contracts in the vertical direction.

A rocking base 21 , which is the lower end of the rocking frame portion 20 , is connected to the upper end, which is one end of the first coil spring portion 11 . The first coil spring portion 11 is fixed to the floor portion GL and the swing table 21 by fixing means (not shown). The rocking frame portion 20 also includes a rocking frame 22 having an inverted U-shape whose end is fixed to the edge of the rocking table 21 .

Further, a lower end portion of a second coil spring portion 31 extending and contracting in the vertical direction is fixed on the rocking table 21 of the rocking frame portion 20 . On the other hand, a work support base 40 is fixed to the upper end portion, which is one end portion of the second coil spring portion 31 . The work support table 40 is composed of a base member (grating) that supports the work W to be sand-removed from below.

A U-shaped work impacting device frame 51 is erected on the floor GL, and a work W placed on the work support table 40 is mounted on the upper end of the work impacting device frame 51. A work impacting device 50 is attached that can impact from above. As the work striking device 50, for example, an air hammer tool or the like can be used.

In addition, through holes 52, 52 are provided in the upper end portion of the work impacting device frame 51 so as to extend therethrough in the vertical direction. The pillar portions of the swing frame 22 are inserted through the through holes 52 , 52 . Note that the through holes 52, 52 constitute swing range restricting means according to the present invention.

A swinging frame hitting device frame 61 is erected on the floor GL, and a swinging frame hitting device 60 for hitting the swinging frame 22 from above is mounted on the swinging frame hitting device frame 61. installed. It should be noted that, for example, an air hammer tool or the like can also be employed for the swinging frame striking device 60 .

The operation mode of the casting sand remover 1 configured as described above will be described below.

First, a work W containing molding sand as shown in FIG. Then, the work striking device 50 continuously applies a striking force to the work W placed on the work support table 40, thereby imparting vibration to the work W in the vertical direction. As a result, the vibration is transmitted to the work W, and the molding sand is discharged one by one while collapsing. In addition, since the work support base 40 on which the work W is placed is also shaken in the vertical direction, the vibration transmitted to the work W is amplified, and vibrations of different frequencies are generated, making the casting sand effective. collapses into

After a predetermined time has passed, the impacting process by the workpiece impacting device 50 is terminated.

After the work impacting device 50 finishes impacting, the swinging frame impacting device 60 begins to intermittently apply impact force to the swinging frame portion 20 . As a result, the swing frame portion 20 starts swinging, and the work support base 40 and the work W also start swinging accordingly. As shown in FIGS. 2 and 3, when the swing frame portion 20 and the work support base 40 swing, the first coil spring portion 11 not only expands and contracts vertically, but also bends. The swing frame portion 20 and the work support base 40 swing in the front-rear direction and the left-right direction as well.

Since the swing frame 22 is inserted through the through holes 52, 52, the swing range of the swing frame 20 is restricted by the hole diameters of the through holes 52, 52, and excessive swing is suppressed. ing.

By swinging the work support base 40 in this way, as shown in FIG. scatters and is expelled from the work W through the hole 72 . The casting sand S is efficiently removed from the workpiece W by the casting sand S splashing in this way.

In the above embodiments, the dimensions and shape of each part can be freely selected.

Moreover, the number and arrangement positions of the first coil spring portion 11 and the second coil spring portion 31 are not particularly limited, and may be singular or plural.

Further, while the work striking device 50 is striking the work support 40, the swinging frame striking device 60 may strike the swinging frame portion 20. If there is a risk that the work W will be damaged by the 50 hitting the work W with excessive force, it is desirable to operate the work hitting device 50 and the swing frame hitting device 60 separately as described above.

In addition, although the swing frame portion 20 is supported from below by the first coil spring portion 11 arranged on the floor portion GL, the swing frame portion 20 is not limited to this. It doesn't matter if it is. Also, the floor GL may be provided in another device.

Further, the work striking device 50 and the swinging frame striking device 60 are not limited to those configured to strike downward, and may be configured to impart an upward striking force. Further, the work impacting device 50 and the swinging frame impacting device 60 do not need to be single units, and may be composed of a plurality of units. Alternatively, the vibration generating structure of each device may be made different to generate different frequencies. For example, a configuration is proposed in which a so-called shaker method (which imparts horizontal vibration) and a straight method (which imparts vertical vibration) are mixed and adopted.

Further, as the workpiece impacting device 50, a sand-removing impacting device used in a conventional sand-removing device can be suitably applied. On the other hand, the oscillating frame striking device 60 is intended to oscillate the workpiece W, and it is desirable that the striking manner of the oscillating frame striking device 60 is relatively longer than that of the oscillating frame striking device 50 .

Further, a mechanism may be provided for repeatedly piercing the molding sand S remaining as a lump in the cavity 71 of the work W with the pointed piercing member 81 to break up the molding sand S. For example, a mechanism that advances and retreats the piercing member 81 using compressed air may be employed, or a mechanism that advances and retreats the piercing member 81 using an electric mechanism may be employed. In particular, by simultaneously piercing the molding sand S with the piercing member 81 while vibrating the workpiece W by the work impacting device 50, lumps of the molding sand S can be efficiently broken and discharged. Such a mechanism constitutes a piercing member advancement/retreat means.

1 casting sand remover 11 first coil spring portion 20 swing frame portion 31 second coil spring portion 40 work support base 50 work impact device 51 frame 52 for work impact device through hole portion 60 swing frame impact device 71 cavity 72 hole Part 80 Piercing member advance/retreat means 81 Piercing member S Casting sand W Work

Claims (3)

A casting sand remover for removing casting sand from a workpiece to be removed,
a first coil spring portion arranged upright with respect to the base surface and extending and contracting in a vertical direction;
a swing frame portion provided at the upper end portion of the first coil spring portion;
a second coil spring portion arranged in an upright state with respect to the swing frame portion and extending and contracting in a vertical direction;
a work support base provided at the upper end of the second coil spring portion for supporting the work;
a work striking device that contacts and strikes the work;
an oscillating frame impact device that applies an impact force to the oscillating frame;
with
The first coil spring part is elastically deformable within a range of elastic deformation, and is in a state of receiving a compressive load due to the weight of the swinging frame part and during operation of the swinging frame striking device, and is in an elastic state,
The second coil spring part is elastically deformable, and is in a state of receiving a compressive load due to the weight of the work and the work support, and is in a state of being able to expand and contract while the work striking device is in operation,
The work impact device applies an impact force that vibrates the work support base that supports the work at least in the vertical direction,
The casting sand removing device, wherein the swinging frame hitting device swings the swinging frame portion in a direction other than the vertical direction while bending the first coil spring portion. 2. A casting sand remover according to claim 1, further comprising swing range restricting means for restricting the swing range of said swing frame portion to a predetermined range. 3. The casting sand remover according to claim 1, further comprising a piercing member having a pointed tip, and further comprising a piercing member advancing/retreating means for advancing and retreating said piercing member with respect to said work.

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