KR20190108677A - Sand core cracker - Google Patents

Abstract

The present invention relates to a molding sand removing apparatus used to remove molding sand from a casted article molded by casting. The molding sand removing apparatus comprises: a lower sand removing base having a fixed base supported on the ground, and a material support seated on an upper end of the fixed base to support a casted article from which sand is to be removed; an upper sand remover head rotatably driven between an upright position in which the upper sand remover head stands upright above the sand removing base and a rotational position in which the upper sand remover head is separated from the top of the sand removing base; and a plurality of air hammers mounted on a side of the upper sand remover head, and liftable between an upper standby position in which chisels on lower ends thereof are vertically distanced from the casted article supported on the material support in the upright position of the upper sand remover head and a lower contact position in which the chisels on the lower ends make contact with the casted article. The plurality of air hammers each have a piston provided therein and striking the chisels on the lower ends by being lifted and vibrated by pneumatic pressure, and the chisels on the lower ends transmit, to the casted article, the strike due to the piston being lifted and vibrated in the contact position. As a result, breakage of the chisels of the air hammers can be minimized, and striking force for removing sand can be increased, thereby increasing the efficiency of the molding sand removing apparatus and reducing noise due to the vibrating and striking.

Description

Foundry Sanding Machine {SAND CORE CRACKER}

The present invention relates to a foundry sand machine for use in removing foundry sand from castings formed by casting.

A common foundry sanding machine has a mode of operation in which the foundry core in the casting is broken by generating vibration to strike the casting. In the conventional casting sand machine 100, as shown in Figures 1 and 2, the lower spinning table 110, on which the casting 1 is placed, rotates by driving the link 111, and also drives the link 121. The upper thruster head 120 rotated by the upper part is combined with the thruster 110, and a plurality of air hammers 130 mounted on the thruster head 120 approach each cast product 1. The stroke is applied to a certain stroke.

However, according to the conventional casting sand descaling machine 100 as described above, there is a disadvantage that the method of injecting the cast product 1, that is, the material of the desawing machine is a relatively complicated method made by the rotational drive of the link 111, and of course, air Since the chisel 131 (see FIG. 3) at the bottom of the hammer 130 strikes the product 1 by the movement of the up and down stroke, the chisel 131 is frequently broken. 131) has to lower the force of about 2 ~ 4 [kgf], and also lower the number of blows per unit time, that is, the frequency of desorption efficiency.

In addition, the noise generated during the vibration hitting of the chisel 131 was a significant factor deteriorating the environment of the workplace.

Lastly, as shown in FIG. 3, between the mounting base 112 supporting the casting 1 on the detachment table 110 and the steel pins 113 fixing the support part 1 due to the hit by the chisel 131. There was a problem that burnout and crushing of the rubber (rubber, 114, 115) portion that mediates between occurs.

[Prior Art Document] Utility Model Registration No. 20-0332278 (Registration Date: October 27, 2003)

Therefore, the object of the present invention is relatively simple structure of the entire device, while minimizing the chisel break of the air hammer while improving the blow force and the number of blows per unit time to increase the efficiency of the machine In addition, the present invention provides a foundry sanding machine that can reduce noise caused by a vibrating blow.

In addition, another object of the present invention to provide a foundry sand machine that can minimize the burning and crushing phenomenon of the side of the mounting base to support the casting object that is subjected to the spinning.

In order to achieve the above object, the present invention provides a casting sanding machine, a lower spinning table having a support base supported on the ground, and a material support seated on an upper end of the fixing support to support a cast object to be removed; An upper spinneret head rotatably driven between an upright position standing upright on an upper portion of the spinning table and a rotational position separated from the top of the spinning table; The upper standby position mounted on the side of the desalator head, the chisel of the lower end is vertically spaced apart from the cast product supported on the material support at the standing position of the demagnetizer head, and the chisel of the lower end is And a plurality of air hammers which are provided to be liftable between lower contact positions in contact with the cast product, wherein the plurality of air hammers each strike the lower end of the chisel by vibrating by lifting and lowering by pneumatic pressure. It is provided with a piston, and the chisel of the lower end provides a foundry sand machine for transmitting a blow due to the lifting vibration of the piston in the contact position to the casting.

Here, the desalator head is provided with a horizontal beam of the upper end for supporting the plurality of desalator head, and a vertical beam coupled to one side of the horizontal beam to extend vertically and the lower end is rotatably coupled to the stator, The foundry sand machine is a drive motor mounted on one side of the stator, a drive link integrally connected to the drive shaft of the drive motor, one end is pin-coupled to the drive link and the other end is pin-coupled to the horizontal beam According to the drive of the drive motor may further include a drive unit having an electric link for rotating the spinner head between the standing position and the rotation position.

The material pedestal is a pedestal base made of steel seated and fastened to an upper end of the fixing stand, a vibration pad plastic pad made of synthetic resin laminated on the pedestal base, and a bottom surface of the cast product laminated on the plastic pad. It may be provided with a material seating plate made of steel to support the.

In addition, the holder is a base plate which is surface-contacted on the ground, a vibration absorbing pad laminated on the base plate, a support plate laminated on the vibration absorbing pad, and is supported on the support plate It may have a holder body having a plurality of legs and the material base is seated on the upper end.

As described above, according to the foundry sanding machine according to the present invention, the casting stand supporting the casting product has a simpler structure as compared with the prior art, and in particular, the chisel forming the lower end of the air hammer is in contact with the casting object to be removed. By virtue of the configuration in which the vibrating piston is transmitted to the casting contacted through the chisel, unlike the prior art, it is possible to prevent the breakage phenomenon caused by the chisel hitting the casting with a predetermined stroke, and the contact blow method as described above It is possible to increase the hitting force through the chisel to 5 ~ 8 [kgf] and to increase the number of hits per unit time to around 20 [Hz]. Of course, due to the contact chisel of the chisel can significantly reduce the noise generated when vibrating strike compared to the prior art.

In addition, by taking a laminated structure of a material support for casting the object to be removed, the plastic seat for the vibration absorbing plastic pad between the material seating table made of upper and lower steel material and the base of the base, so as to absorb the vibration when hitting through the chisel. Burnout and crushing in the plastic pad part can be prevented.

1 and 2 is a front view showing a state before and after the operation of the molding sand depilator according to the prior art,
Figure 3 is an enlarged view showing only the main part of the foundry sanding machine of Figure 1;
4 and 5 are a perspective view of the foundry sand machine according to an embodiment of the present invention from one direction and the opposite direction,
6 and 7 are front views showing the state before and after the operation of the casting sand machine of Figure 4,
8 is a perspective view of a material support that is one component of the foundry sanding machine of FIG. 4;
FIG. 9 is a longitudinal sectional view of an air hammer as one component of the foundry sanding machine of FIG. 4.

Foundry sand machine according to an embodiment of the present invention as shown in Figures 4 and 5, the lower spinning table 210, which is supported on the ground, the upper spinning machine is rotatably coupled to the spinning table 210 Head 220, a plurality of air hammers 230 mounted vertically to the demister head 220, and a driving unit 240 for rotationally driving the demister head 220. .

The detachment table 210 includes a holder 211 supported on the ground and a material support 250 seated on an upper end of the holder 211.

The fixing stand 211 is laminated on the base plate 212 supported by surface contact on the ground, the vibration absorbing pad 213 made of a rubber material laminated on the base plate 212, and the vibration absorbing pad 213. It is provided with a support plate 214, and has a structure in which a plurality of legs on the support body 215 side is supported on the support plate 214. Accordingly, the vibration and shock transmitted from the fixing body 215 to the lower part are absorbed by the vibration absorbing pad 213.

The material pedestal 250 is seated inside the upper end of the holder main body 215 to support the casting 1 to be removed (see FIGS. 6 and 7). As shown in FIG. 8, the material pedestal 250 is a pedestal base 251 made of steel that is seated and fastened to an upper end of the pedestal body 215, and vibration absorption of a synthetic resin material laminated on the pedestal base 251. The plastic pad 252 is provided on the plastic pad 252, and is provided with a steel material mounting stand 253 supporting the bottom surface of the cast product 1. In particular, the plastic pad 252 can significantly increase the replacement cycle in terms of absorbing vibrations and shocks transmitted from the material seating plate 253 but far less burning and crushing than the rubber material.

4 and 5, the desalator head 220 is coupled to the upper end of the vertical beam 221, the lower end of the vertical beam 221 rotatably coupled to the side of the fixing base 211, extending horizontally The horizontal beam 222 is provided. The horizontal beams 222 support a plurality of air hammers 230. The desalator head 220 is a 'rotational position' which is separated from the upper portion of the detaching table 210 as shown in Figure 6, and is vertically standing on the upper portion of the detaching table 210 as shown in FIG. It is rotatably driven between 'standing positions'.

In order to drive the spinner head 220, the foundry sand machine 200 according to the embodiment of the present invention includes a driving unit 240 as illustrated in FIGS. 4 and 5. The drive unit 240 has a drive motor 241 mounted on one side of the fixing stand 211, a drive link 242 integrally connected to the drive shaft of the drive motor 241, and one end thereof is pinned to the drive link 242. It is coupled to the other end is provided with an electric link 243 for pin coupling to the horizontal beam 222 side. As a result, when the driving motor 241 is rotated, the desalator head 220 is disposed between the rotational position of FIG. 6 and the standing position of FIG. 7 through the driving link 242 and the electric link 243 as described above. Can rotate

In particular, the plurality of air hammers 230 mounted to the desalator head 220 in the standing position of FIG. 7 are spaced vertically from the casting 1 supported on the work pedestal 250 of FIG. 4. From the position '(see FIG. 4), the chisel 231 at the lower end is driven to the lower' contact position '(see FIG. 7) in contact with the casting 1. That is, the plurality of air hammers 230 are provided to be capable of lifting up and down between the standby position and the contact position.

The transmission of the blow due to the vibration of the air hammer 230 is made in the state that the chisel 231 of the lower end is in contact with the upper end of the casting 1, that is, in the contact position as described above. As an example of a configuration for this operation, the air hammer 230 may have an internal structure shown in FIG. That is, when the piston 233 in the housing 232 vibrates up and down by air flow through the air passages 232a and 232b spaced up and down, the chisel 231 coupled to protrude to the lower portion of the housing 232 is lowered. The blow is transmitted to the casting 1 which is hit by the piston 233 and contacted through the lower end thereof.

When the crushing of the foundry sand core (core) in the casting (1) is completed by the hitting, the desalator head 220 is rotationally driven from the standing position of Figure 7 to the rotation position of Figure 6, take-out device (not shown) The cast product 1 seated on the spinning table 210 is taken out, and then the cast product 1, which is a new spinning target, is seated on the spinning table 210 by the take-out apparatus.

On the other hand, since the casting sand machine 200 described above is only one embodiment to help understanding of the present invention, it is difficult to understand that the scope of the present invention to the technical scope is limited to those described above, The scope of the invention to the technical scope is defined by the claims and equivalents described below.

1: casting 200: casting sand machine
210: detachment table 211: anchor
212: base plate 213: vibration absorbing pad
214: support plate 215: holder body
220: desalator head 221: vertical beam
222: horizontal beam 230: air hammer
231: chisel 232: housing
233: piston 240: drive unit
241: drive motor 242: drive link
243: electric link 250: material support
251: base pedestal 252: plastic pad
253: material seat

Claims (4)

In the foundry sanding machine,
A lower detachment table having a support supported on the ground, and a material support seated on an upper end of the support to support a casting object to be removed;
An upper thruster head which is rotatably driven between an upright position standing upright on an upper portion of the detachment stage and a rotational position separated from an upper portion of the detachment stage;
The upper standby position mounted on the side of the desalator head, the chisel of the lower end is vertically spaced apart from the cast product supported on the material support at the standing position of the demagnetizer head, and the chisel of the lower end is A plurality of air hammers provided to be movable up and down between the lower contact positions in contact with the casting,
Each of the plurality of air hammer
A piston for hitting the chisel of the lower end by raising and lowering vibration by pneumatic pressure therein, wherein the chisel of the lower end transmits the blow due to the lifting vibration of the piston at the contact position to the cast product. scam. The method of claim 1,
The depilator head
A horizontal beam of an upper end supporting the plurality of desalting machine heads, and a vertical beam coupled to one side of the horizontal beam and extending vertically and having a lower end rotatably coupled to the fixing base,
The foundry sanding machine
A drive motor mounted on one side of the stator, a drive link integrally connected to the drive shaft of the drive motor, one end of which is pin-coupled to the drive link, and the other end of which is pin-coupled to the horizontal beam, to drive the drive motor. And a drive unit having an electric link for rotating the descaler head between the standing position and the rotational position. The method of claim 1,
The material pedestal
Steel base seated on the upper end of the fixture and fastened, Vibration-absorbing plastic pad of synthetic resin material laminated on the pedestal base, Steel material laminated on the plastic pad to support the bottom of the cast product Foundry yarn spinning machine characterized in that it comprises a material mounting stand. The method of claim 1,
The fixture is
A base plate which is surface-contacted on the ground, a vibration absorbing pad laminated on the base plate, a support plate laminated on the vibration absorbing pad, and a plurality of legs supported on the support plate; Foundry yarn spinning machine characterized in that it comprises a fixing body for mounting the material support on the upper end.

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