KR20190124402A - Sand core cracker - Google Patents

Abstract

The present invention relates to a molding sand remover which is used to remove molding sand from a molded product that is formed after being molded. To this end, the present invention comprises: a molding sand removing bar of a lower portion, which includes a fixating bar reciprocating in right and left directions by a horizontal rotating link rotated in right and left directions, and a material supporting bar mounted on an upper end portion of the fixating bar in order to support a molded product from which molding sand is to be removed; a molding sand removing head of an upper portion, which reciprocates in upper and lower directions by a vertical rotating link rotated in upper and lower directions in order to be integrated with the molding sand removing bar; and a plurality of air hammers which are mounted on the molding sand removing head, and are provided to be elevatable between a standby position of an upper portion in which a chisel of a lower end portion is vertically spaced from the molded product supported on the material supporting bar in a state in which the molding sand removing head is integrated with the molding sand removing bar, and a contact position of a lower portion in which the chisel of the lower end portion comes in contact with the molded product. Here, the plurality of air hammers are individually provided with a piston therein, which is vibrated to be elevated by a pneumatic pressure to apply an impact to the chisel of the lower end portion, such that the chisel of the lower end portion may deliver the impact by the elevating vibration of the piston to the molded product in the contact position. Therefore, the phenomenon that the chisel of the air hammers is broken can be minimized, and an impact force for removing the molding sand can be increased, thereby increasing efficiency of the molding sand remover. In addition, noise caused by vibration and impact can be reduced.

Description

Foundry Sander {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, the chisel 131 (see FIG. 3) at the lower end of the air hammer 130 strikes the product 1 by moving the up and down strokes. This breakdown occurred frequently, and in order to prevent this, the force of the chisel 131 must be lowered to about 2-4 [kgf], and the number of blows per unit time, that is, the frequency must also be lowered. It became.

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)

Accordingly, an object of the present invention is to minimize the phenomenon of breaking the chisel of the air hammer and at the same time to improve the blow force and the number of blows per unit time to increase the efficiency of the descaling machine and to reduce the noise due to vibration blow To provide a thrashing machine.

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 caster descaling machine, a support for reciprocating from side to side by a horizontal rotational link driven to rotate left and right, and a material support for supporting a cast object to be removed by being mounted on an upper end of the fixing unit. A lower detachment band having; An upper desalter head reciprocating up and down by a vertical rotational link driven up and down to be combined with the detaching table; A standby position of an upper portion mounted on the desalting machine head side, the chisel of a lower end being vertically spaced apart from the cast product supported on the material support in a state in which the desalting machine head is joined to the dehydrating table; The lower end of the lower end of the lower portion of the chisel by including a plurality of air hammer (air hammer) which is provided to be able to lift and lower between the contact position of the lower contact with the casting, each of the plurality of air hammer It is provided with a piston for hitting the chisel, the chisel of the lower end provides a casting sand spinning machine characterized in that the blow due to the lifting vibration of the piston in the contact position to the cast.

Here, the material pedestal is a pedestal base of a steel material is seated and fastened to the upper end of the fixed base, a vibration absorbing plastic pad made of a synthetic resin material laminated on the pedestal base, and the bottom surface of the casting is laminated on the plastic pad It is also possible to take the configuration provided with a steel material mounting stand supporting the support.

As described above, according to the foundry sand machine according to the present invention is a piston that vibrates up and down inside the state in which the chisel forming the lower end of the air hammer is in contact with the casting object to be removed, the blow is transmitted to the cast product contacted through the chisel. By taking the configuration, unlike the prior art, it is possible to prevent breakage caused by the chisel hitting the cast product at a predetermined stroke, and to increase the hitting force through the chisel of the contact hitting method as described above to 5-8 [kgf]. Since the number of blows per unit time can be increased to around 20 [Hz], the efficiency of the machine can be improved. 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 in which a material support for casting out the object to be removed, the plastic seat for vibration absorption plastic pad between the material seating table made of steel material up and down 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 is a front view showing a state before and after the operation of the molding sand depilator according to an embodiment of the present invention,
6 is a perspective view of a material support that is one component of the foundry sanding machine of FIG. 4;
FIG. 7 is a longitudinal sectional view of an air hammer that is 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 driven to rotate left and right on the ground, can be driven up and down to be combined to the spinning table 210. It is configured to include a plurality of air hammer (230) to be mounted vertically to the top of the desalator head 220, which is provided to the vertical.

The detachment table 210 includes a horizontal rotational link 211 which is pivotally driven left and right, and a fixing table 212 that is reciprocally driven left and right by the horizontal rotational link 211. On the upper end of the fixing unit 212 is mounted a material support 240 for supporting the casting (1) that is subject to spin.

The material base 240 is seated inside the upper end of the holder 212 to support the casting 1 that is to be removed. As shown in FIG. 6, the base pedestal 240 is a pedestal base 241 made of steel, which is seated and fastened to an upper end of the fixing base 212, for vibration absorption of a synthetic resin material laminated on the pedestal base 241. The plastic pad 242 is provided on the plastic pad 242 and is provided with a steel material mounting stand 243 supporting the bottom surface of the casting 1. In particular, the plastic pad 242 can greatly increase the replacement cycle in terms of absorbing vibrations and shocks transmitted from the material seating plate 243 but much less burning and crushing than the rubber material.

The desalator head 220 includes a vertical rotational link 221 that is rotated up and down, and a head body 222 that is reciprocated up and down by the vertical rotational link 221. In the downward rotation driving of the vertical rotation link 221, the head body 222 is integrated into the fixing base 212 rotated to the right as shown in FIG. 5.

In the plurality of air hammers 230 mounted on the desalator head 220, the casted product 1 in which the chisel 231 of the lower end is supported on the material support 240 in FIG. The contact position of the lower portion in contact with the chisel 231 is provided to be able to lift between the upper 'stand position' (not shown) spaced upward from the casting (1).

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 impact is transmitted to the cast 1 that is hit by the piston 233 and contacted through the lower end thereof.

When the crushing of the foundry sand core in the casting (1) is completed by the hitting, the desalver head 220 is driven from the combined position of FIG. 5 to the elevated position of FIG. It is moved and driven, and the detaching table 210 is driven to move from the right position of FIG. 5 to the left position of FIG. 4 by the driving of the horizontal rotating link 211. Subsequently, the casting 1 seated on the detachment table 210 is taken out by a take-out device (not shown), and then a casting 1 that is a new object to be removed is seated on the detaching table 210 by the take-out device. .

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: horizontal rotating link
212: Fixture 220: Decimator Head
221: vertical rotational link 222: head body
230: air hammer 231: chisel
232: housing 233: piston
240: material support 241: support base
242: plastic pad 243: material rest

Claims (2)

In the foundry sanding machine,
A lower detachment stand having a fixing stand which is reciprocated left and right by a horizontal rotating link driven to rotate left and right, and a material support seated on an upper end of the fixing stand to support a casting object to be removed;
An upper desalter head reciprocating up and down by a vertical rotational link driven up and down to be combined with the detaching table;
A standby position of an upper portion mounted on the desalting machine head side, the chisel of a lower end being vertically spaced apart from the cast product supported on the material support in a state in which the desalting machine head is joined to the dehydrating table; The chisel of the lower end includes a plurality of air hammer (air hammer) which is provided to be able to lift and lower between the contact position of the lower contact with the casting,
Each of the plurality of air hammer
A piston which strikes the chisel at the lower end by raising and lowering vibration by pneumatic pressure therein, wherein the chisel at the lower end transmits the impact caused by the lifting vibration of the piston at the contact position to the cast product. scam. 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.

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