JP6348139B2 - Core sand removal device - Google Patents

Description

  The present invention relates to a core sand removing device, and more particularly, to a core sand removing device that removes core sand filled in a cast product.

Conventionally, the core sand of a cast product has been dropped by applying vibration to the cast product.
As a method of dropping the core sand of such a cast product, a striking step of hitting a cast product rough material filled with a sand core with a sand discharge port with a predetermined impact force, and after the striking step, the cast product rough material A core sand dropping method has been proposed which has a vibration step of applying vibration to a cast product rough material in a state where a predetermined amount of core sand is retained and retained in advance (Patent Document). 1).
According to the core sand dropping method of Patent Document 1, the core sand can be crushed by the striking process, and the core sand remaining inside can be refined and dropped by the vibration process.

JP2013-86140A

  However, according to the core sand dropping method of Patent Document 1, the core sand remaining inside after the striking process can be refined and dropped by the vibration process, but it is necessary to perform the vibration process after the striking process. In the process of dropping the core sand of the cast product, a cycle time for two steps is required, and the cycle time per product is long.

  The present invention provides a core sand removing device that can appropriately remove the core sand of a cast product and can shorten the cycle time per product in the step of dropping the core sand of the cast product. For the purpose.

(1) A core sand removing device for removing core sand filled in a cast product,
A frame that is supported by an elastic body and on which the cast product is placed;
A striking portion that is fixed to the frame and strikes the surface of the cast product;
A vibration generator fixed to the frame and vibrating the frame;
A control unit for controlling the driving of the striking unit and the vibration generating unit,
The core sand removing device that performs control to drive the vibration generating unit while driving the hitting unit.

According to the configuration of the core sand removing device (1) of the present invention, the core sand removing device includes a frame, a striking portion, a vibration generating portion, and a control portion, and is filled in a cast product. Remove core sand.
The frame is supported by an elastic body, and a cast product is placed thereon.
The hitting part is fixed to the frame and hits the surface of the cast product.
The vibration generator is fixed to the frame and vibrates the frame.
The control unit controls driving of the striking unit and the vibration generating unit.
And a control part performs control which drives a vibration generation part, driving a striking part.

Thereby, the lump of core sand in the cast product is crushed by the striking portion and is peeled off from the inner wall of the cast product. Further, the frame body is vibrated by the vibration generating unit, and the cast product placed on the frame body is vibrated to collide the lump of crushed core sand, and the cast product and the lump of core sand. The core sand can be discharged from the cast product by making the core sand lump finer. Therefore, the core sand of the cast product can be properly removed.
And since the vibration generating unit is driven while driving the striking unit, the step of crushing the lump of core sand in the cast product and the step of crushing the lump of crushed core sand can be performed simultaneously. it can.
Therefore, it is possible to provide a core sand removing device capable of properly removing the core sand of the cast product and reducing the cycle time per product in the step of dropping the core sand of the cast product.

  Moreover, since the striking part and the vibration generating part are fixed to the frame on which the cast product is placed, the installation space for the core sand removing device is larger than when the striking part and the vibration generating part are attached to different supports. Can be suppressed.

  (2) The said control part controls the drive of the said vibration generation part and the said striking part by making the vibration period of the said vibration generation part differ from the striking period of the said striking part, The core sand as described in (1) Removal device.

  Thereby, the vibration by the striking part and the vibration by the vibration generating part cancel each other, the vibration in the cast product is reduced, and it is possible to prevent the efficiency of dropping the core sand from being lowered.

  (3) The core sand according to (1), wherein the control unit controls driving of the vibration generating unit and the hitting unit by synchronizing a vibration cycle of the vibration generating unit and a hitting cycle of the hitting unit. Removal device.

  Thereby, it becomes possible to increase the vibration in the casting product by the resultant force of the vibration by the striking part and the vibration by the vibration generating part, and the efficiency of dropping the core sand can be improved.

(4) The striking portion includes a chisel portion that contacts the casting product, and a piston portion that impacts the chisel portion by reciprocating,
The control unit according to any one of (1) to (3), wherein the control unit drives the striking unit to reciprocate the piston unit in a state where the chisel unit is in contact with the casting product. Child sand removal device.

According to the configuration (4) of the core sand removing device of the present invention, the striking part includes the chisel part and the piston part.
The chisel portion comes into contact with the cast product.
The piston part impacts the chisel part by reciprocating.
And a control part reciprocates a piston part in the state which made the chisel part contact | abut the casting product in control which drives a striking part.

According to such a configuration, in the step of dropping the core sand in the cast product, the control unit abuts and fixes the chisel part to the cast product placed on the frame, and reciprocates the piston part. The core sand in the cast product can be crushed by giving an impact to the chisel. Then, at the end of the step of dropping the core sand in the cast product, the control unit separates the chisel part from the cast product. Thereby, a cast product can be taken out from the core sand removing device.
Therefore, in addition to the striking part, a jig for fixing the cast product is provided in the frame body, the cast product is set in the core sand removing device, and this jig is operated to fix the cast product. Compared with the case where the core sand is dropped and then the jig is operated to release the cast product and then the cast product is removed from the core sand removal device, the cycle time per product is further shortened. be able to.

(5) The control unit
Performing control to drive the striking part at a striking period of 25 to 40 Hz,
The core sand removing device according to any one of (1) to (4), wherein the vibration generating unit is controlled to be driven at a vibration period of 15 to 60 Hz.

  According to the configuration (5) of the core sand removing device of the present invention, the vibration generating part is driven at a vibration period of 15 to 60 Hz, and the striking part is driven at a striking period of 25 to 40 Hz. Since the core sand can be crushed and fined more efficiently, the cycle time per product can be further shortened in the process of dropping the core sand of the cast product.

  (6) The control unit performs the control of hitting the cast product from above by the hitting unit at a timing when the acceleration at the time of rising in the vibration of the frame body by the vibration generating unit becomes maximum (from (1) to ( The core sand removing apparatus according to any one of 5).

  According to the configuration of the core sand removing device (6) of the present invention, the casting product is struck from above by the striking portion at the timing at which the acceleration at the time of rising in the vibration of the frame body by the vibration generating portion becomes maximum. The impact on the cast product is increased by hitting the hitting portion, and the efficiency of dropping the core sand can be improved.

  (7) The control unit performs the control of hitting the cast product from above by the hitting unit at a timing at which the acceleration at the time of the descent in the vibration of the frame body by the vibration generating unit becomes maximum (from (1) to ( The core sand removing apparatus according to any one of 6).

  According to the configuration of the core sand removing device (7) of the present invention, the casting product is struck from above by the striking portion at the timing when the acceleration at the time of the descent in the vibration of the frame body by the vibration generating portion becomes maximum. Due to the combined force of the descent force and the impact force, the impact on the cast product is increased, and the efficiency of dropping the core sand can be improved.

  (8) The core sand removing device according to any one of (1) to (6), wherein the frame body holds the cast product via an elastically deformable vibration isolator.

  According to the configuration (8) of the core sand removing device of the present invention, by holding the cast product via the elastically deformable vibration isolating portion, the striking direction by the striking portion and the vibration direction by the vibration generating portion This makes it possible to prevent the cast product from shaking in different directions, and can efficiently transmit the force from the impact of the striking part and the vibration from the vibration generating part to the cast product. It can be improved.

  According to the core sand removing device of the present invention, the core sand of the cast product can be properly removed, and the cycle time per product can be shortened in the step of dropping the core sand of the cast product. A core sand removing device can be provided.

It is a figure explaining the composition of core sand removal device 1 concerning the embodiment of the present invention. It is a figure explaining the structure of the hit | damage part 20 of the core sand removal apparatus 1 which concerns on embodiment of this invention. It is a figure explaining operation | movement of the hit | damage part 20 of the core sand removal apparatus 1 which concerns on embodiment of this invention. It is a figure explaining operation | movement of the hit | damage part 20 of the core sand removal apparatus 1 which concerns on embodiment of this invention. It is a figure explaining the state which the core sand removal apparatus 1 which concerns on embodiment of this invention operate | moved. It is a figure explaining an example of control by the control part 40 of the core sand removal apparatus 1 which concerns on embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same components are denoted by the same reference numerals, and the description thereof is omitted or simplified.
FIG. 1 is a diagram illustrating a configuration of a core sand removing device 1 according to an embodiment of the present invention.
The core sand removing device 1 includes a frame 10, a striking unit 20, a vibration generating unit 30, and a control unit 40, and removes the core sand 300 filled in the cast product 100.
The core sand removing device 1 appropriately removes the core sand 300 from the cast product 100 by vibrating the cast product 100 set on the frame 10 with the vibration generating unit 30 while striking the cast product 100 with the striking unit 20. In addition, in the process of dropping the core sand 300 of the cast product 100, the cycle time per product can be shortened.

The frame body 10 is disposed on the gantry 200 and the floor surface, on which the cast product 100 is placed, the frame 110, the spring 120 as an elastic body, the anti-vibration rubber 130 as the anti-vibration part, and the cradle 140. And comprising.
The frame 110 includes a bottom portion 111, a support column 112 standing from an edge of the bottom portion 111, and a top portion 113 supported by the support column 112.
Further, a hitting unit 20 and a vibration generating unit 30 described later are attached to the frame 110.

The spring 120 is erected from the gantry 200 or the floor and supports the entire core sand removing device 1.
The anti-vibration rubber 130 is erected from the bottom 111 and supports the cradle 140.
The cradle 140 is disposed at the upper end of the anti-vibration rubber 130, and the cast product 100 is placed on the upper surface thereof.
Thus, the frame 10 holds the cast product 100 via the elastically deformable vibration isolator.

The striking unit 20 is provided on the top portion 113 of the frame body 10 and is driven and controlled by the control unit 40 to strike the surface of the cast product 100 placed on the cradle 140 of the frame body 10.
In the present embodiment, the striking unit 20 is provided on the top 113, and is driven and controlled by the control unit 40. The striking unit 20 is driven in the vertical direction to apply vibrations from the top to the cast product 100 disposed below. However, the present invention is not limited to this, and the striking portion 20 may be provided on the side, and vibration due to striking may be applied to the cast product 100 from the side. Also good.

FIG. 2 is a diagram illustrating the configuration of the striking unit 20 of the core sand removing device 1 according to the embodiment of the present invention.
The striking part 20 includes an outer cylinder 210, an inner cylinder 220, a piston part 230, and a chisel part 240.

  The outer cylinder 210 is fixed to the top portion 113 (see FIG. 1) of the frame body 10, and an airtight cylindrical space 211 in which the inner cylinder 220 can slide and a cylinder descending air inlet air communicating with the airtight cylindrical space 211. A mouth 212 and a cylinder rising air inlet 213 and an air inlet 214 for a vibrator that communicates with a pressure accumulating chamber 221 of the internal cylinder 220 described later are formed.

The airtight cylindrical space 211 is divided into two by an internal cylinder 220, and a cylinder descending air inlet 212 is communicated with one side (upper in the example shown in FIG. 2), and the other (lower side in the example shown in FIG. 2). A cylinder rising air inlet 213 communicates with the cylinder.
As a result, when air enters the cylinder descending air inlet 212 under the control of the control unit 40, the internal cylinder 220 moves to the other side (downward in the example shown in FIG. 2), and the cylinder rising air inlet When air is introduced into the mouth 213, the inner cylinder 220 moves to one side (upward in the example shown in FIG. 2).
As described above, the position of the inner cylinder 220 is adjusted by the air pressure in the airtight cylindrical space 211 divided by the control unit 40. Thereby, even if the casting product 100 is vibrated by the vibration generating unit 30 (see FIG. 1), which will be described later, the tip of the chisel portion 240 is brought into contact with the casting product 100, the inner cylinder 220 vibrates. Since it follows, the vibration by the hit | damage of the hit | damage part 20 can be efficiently transmitted to the casting product 100. FIG.
Further, in such a case, the airtight cylindrical space 211 functions as a cushion against vibrations generated by the vibration generating unit 30 and the striking unit 20, and the core sand removing device 1 can be prevented from being damaged by these vibrations.

A part (upper part in the example shown in FIG. 2) of the inner cylinder 220 is slidably supported in the airtight cylindrical space 211 of the outer cylinder 210, and the other part (upper part in the example shown in FIG. 2) protrudes from the outer cylinder 210. ing.
The inner cylinder 220 slidably supports the piston part 230 inside, and slidably supports a part of the chisel part 240 (upper part in the example shown in FIG. 2) at the tip.
The internal cylinder 220 is formed on one end side (the upper end side in the example shown in FIG. 2) of the piston portion 230, and the pressure accumulating chamber 221 that communicates with the vibrator air inlet 214 of the external cylinder 210, and the piston portion 230. Are provided with a striking chamber 222 formed on the other end side (the other end side in the example shown in FIG. 2) and a cylinder communication path 223 extending from the pressure accumulating chamber 221.

The piston portion 230 is movably disposed inside the internal cylinder 220 so as to be movable toward the pressure accumulating chamber 221 side and the striking chamber 222 side of the inner cylinder 220, and one end communicates with the striking chamber 222 and the other end opens toward the side surface. A piston communication path 231 is provided.
When the piston portion 230 is disposed on the pressure accumulating chamber 221 side, the other end of the piston communication passage 231 faces the inner wall of the internal cylinder 220 (closed), and the piston portion 230 is disposed on the striking chamber 222 side. If so, it communicates with the cylinder communication passage 223.
Similarly, when the piston part 230 is disposed on the pressure accumulating chamber 221 side, the other end of the cylinder communication path 223 faces the side surface of the piston part 230 (closed), and the piston part 230 is on the striking chamber 222 side. In the case of being arranged in the position, it communicates with the piston communication path 231.

  A part (upper part in the example shown in FIG. 2) of the chisel part 240 is slidably supported by the inner cylinder 220, and one end (upper end in the example shown in FIG. 2) projects into the striking chamber 222 of the inner cylinder 220. When the part 230 moves to the striking chamber 222 side, the piston 230 comes into contact with the other end (lower end in the example shown in FIG. 2), and the other part (lower part in the example shown in FIG. 2) protrudes from the internal cylinder 220. Yes.

3 and 4 are diagrams illustrating the operation of the striking unit 20 of the core sand removing device 1 according to the embodiment of the present invention.
The controller 40 (see FIG. 1) supplies air to the cylinder descending air inlet 212 of the external cylinder 210 from the state shown in FIG. Then, the inner cylinder 220 moves downward, the lower end of the chisel portion 240 abuts on the surface of the cast product 100, and the state shown in FIG. Thus, the cast product 100 is sandwiched and fixed by the cradle 140 of the frame body 10 and the chisel portion 240 of the striking portion 20.

  And the control part 40 supplies high pressure compressed air to the air inlet port 214 for vibrators from the state shown in FIG. This high-pressure compressed air flows into the striking chamber 222 from the vibrator air inlet 214 via the pressure accumulating chamber 221, the cylinder communication passage 223, and the piston communication passage 231, and pushes the piston portion 230 upward. It will be in the state shown.

  Then, since the other end of the cylinder communication path 223 is blocked by the side surface of the piston part 230, the internal pressure of the pressure accumulating chamber 221 increases, and the internal pressure of the piston part 230 is pushed down by this internal pressure. The top end of 240 is hit and the state returns to the state shown in FIG. 3 and the above operation is repeated.

Here, in a general vibration hammering type sand remover, a piston in a cylinder reciprocates at high speed to collide with a chisel, and the vibration is transmitted from the chisel to the outside. In this case, in order to reciprocate the piston, a valve mechanism is provided in the cylinder, and the moving direction of the piston is switched by this valve mechanism.
However, since this valve mechanism is generally a complicated mechanism, it is damaged by vibration or impact.
For this reason, when the cast product is vibrated by the vibration generating portion while being hit with a general vibration hitting sand remover, the valve mechanism may be damaged immediately.
However, the striking part 20 of the present embodiment can continuously change the position where the pressure is applied by the high-pressure compressed air by the operation of the piston part 230, so that the casting product 100 is struck by the striking part 20, Since the possibility of failure can be reduced when the vibration generator 30 vibrates, the cycle time per product can be shortened in the process of dropping the core sand of the cast product.

Returning to FIG. 1, the vibration generating unit 30 is provided in a pair at positions opposed to each other in the support column 112 of the frame 10, and is controlled by the control unit 40 to set the casting product 100. 10 is vibrated.
The vibration generating unit 30 is composed of a motor that rotates a rotating shaft to which an unbalanced weight is attached. The vibration generating unit 30 is not limited to a motor, and may have any configuration as long as the frame 10 on which the cast product 100 is set can be vibrated.
The control unit 40 synchronizes the pair of vibration generating units 30 and rotates the unbalance weights in opposite directions to generate vibrations, which are transmitted to the frame body 10 and set in the frame body 10. The cast product 100 is vibrated.
In this embodiment, the vibration generating unit 30 is provided on the support column 112 (side surface of the frame body 10) of the frame body 10, but not limited thereto, the bottom portion 111 (bottom surface of the frame body 10) and the top portion 113. You may provide in (the upper surface of the frame 10).

FIG. 5 is a diagram for explaining an operating state of the core sand removing device 1 according to the embodiment of the present invention.
The control unit 40 controls driving of the striking unit 20 and the vibration generating unit 30.
The control unit 40 performs control to drive the vibration generating unit 30 while driving the striking unit 20.
The control unit 40 varies the vibration period of the vibration generating unit 30 and the striking period of the striking unit 20 in accordance with the size of the cast product 100, the state of the core sand 300, and the like, so that the vibration generating unit 30 and the striking unit The driving of the vibration generating unit 30 and the striking unit 20 may be controlled by synchronizing the vibration cycle of the vibration generating unit 30 and the striking cycle of the striking unit 20.

Moreover, the control part 40 adjusts the supply amount of the high pressure compressed air supplied to the air inlet 214 for vibrators (refer FIG. 2), and makes the striking part 20 25-40 Hz (preferably 30-33 Hz). The drive is controlled at the striking cycle.
The control unit 40 performs control to drive the vibration generating unit 30 with a vibration cycle of 15 to 60 Hz (preferably 24 to 48 Hz) by an inverter.

FIG. 6 is a diagram illustrating an example of control by the control unit 40 of the core sand removing device 1 according to the embodiment of the present invention.
The control unit 40 performs a control of hitting the casting product 100 from above by the hitting unit 20 at the timing T1 at which the acceleration A during the vibration in the vibration of the frame body 10 by the vibration generating unit 30 becomes maximum.
Further, the control unit 40 performs control for causing the casting product 100 to be hit D from above by the hitting unit 20 at the timing T2 when the acceleration A during the descent in the vibration of the frame body 10 by the vibration generating unit 30 becomes maximum.

As mentioned above, according to the core sand removal apparatus 1 which concerns on this embodiment, there exist the following effects.
According to the core sand removing apparatus 1, the lump of the core sand 300 in the cast product 100 is crushed by the striking unit 20 and separated from the inner wall of the cast product 100. Further, the frame 10 is vibrated by the vibration generating unit 30 to vibrate the cast product 100 placed on the frame 10, thereby causing the lump of the crushed core sand 300 to collide with each other. The core sand 300 can be discharged from the casting 100 by causing the core sand 300 to collide with the lump of the core sand 300 and making the lump of the core sand 300 finer. Therefore, the core sand 300 of the cast product 100 can be appropriately removed.
And since the vibration generating unit 30 is driven while driving the striking unit 20, a step of crushing the lump of the core sand 300 in the casting product 100, a step of crushing the lump of the crushed core sand 300, Can be performed simultaneously.
Therefore, a core sand removing device capable of properly removing the core sand 300 of the cast product 100 and reducing the cycle time per product in the process of dropping the core sand 300 of the cast product 100 is provided. Can be provided.

  Moreover, since the striking part 20 and the vibration generating part 30 are fixed to the frame 100 on which the cast product 100 is placed, the core 20 is compared with the case where the striking part 20 and the vibration generating part 30 are attached to different supports. The installation space for the sand removal device can be reduced.

  Further, according to the core sand removing device 1, the control unit 40 controls the driving of the vibration generating unit 30 and the striking unit 20 by making the vibration cycle of the vibration generating unit 30 different from the striking cycle of the striking unit 20. Therefore, the vibration by the striking part 20 and the vibration by the vibration generating part 30 cancel each other, and the vibration in the cast product 100 is reduced, so that the efficiency of dropping the core sand 300 can be prevented from being lowered.

  Further, according to the core sand removing device 1, the control unit 40 controls the driving of the vibration generating unit 30 and the striking unit 20 by synchronizing the vibration cycle of the vibration generating unit 30 and the striking cycle of the striking unit 20. Therefore, the vibration of the casting product 100 can be increased by the resultant force of the vibration of the striking unit 20 and the vibration of the vibration generating unit 30, and the efficiency of dropping the core sand 300 can be improved.

Further, according to the core sand removing device 1, the control unit 40 causes the chisel portion 240 to abut on the cast product 100 placed on the frame body 10 in the step of dropping the core sand 300 in the cast product 100. The core sand 300 in the cast product 100 can be crushed by reciprocating the piston part 230 and applying an impact to the chisel part 240. And the control part 40 spaces apart the chisel part 240 from the casting product 100 at the end of the process of dropping the core sand 300 in the casting product 100. Thereby, the cast product 100 can be taken out from the core sand removing device 1.
Therefore, in addition to the striking part, a jig for fixing the cast product is provided in the frame body, the cast product is set in the core sand removing device, and this jig is operated to fix the cast product. Compared with the case where the core sand is dropped and then the jig is operated to release the cast product and then the cast product is removed from the core sand removal device, the cycle time per product is further shortened. be able to.

  Moreover, according to the core sand removal apparatus 1, the core in the cast product 100 is driven by driving the vibration generating unit 30 with a vibration cycle of 15-60 Hz and driving the striking unit 20 with a striking cycle of 25-40 Hz. Since the sand 300 can be crushed and finer more efficiently, the cycle time per product can be further shortened in the step of dropping the core sand 300 of the cast product 100.

  Further, according to the core sand removing device 1, the casting product 100 is hit from the upper side by the hitting unit 20 at the timing when the acceleration at the time of the rise of the vibration of the frame body 10 by the vibration generating unit 30 is maximized. The impact given to the cast product 100 by the impact of 20 increases, and the efficiency of dropping the core sand 300 can be improved.

  Moreover, according to the core sand removal apparatus 1, since the casting product 100 is hit | damaged from upper direction by the striking part 20 at the timing when the acceleration at the time of the fall in the vibration of the frame 10 by the vibration generation part 30 becomes the highest, Due to the combined force of the force and the force generated by the impact, the impact given to the cast product 100 is increased, and the efficiency of dropping the core sand 300 can be improved.

  Further, according to the core sand removing device 1, by holding the cast product 100 via the elastically deformable vibration isolator 130, the striking direction by the striking part 20 and the vibration direction by the vibration generating part 30 are: It is possible to prevent the cast product 100 from being swayed in different directions, and the force caused by the impact of the striking portion 20 and the force caused by the vibration of the vibration generating portion 30 can be efficiently transmitted to the cast product, so the core sand 300 is dropped. Efficiency can be improved.

  It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.

DESCRIPTION OF SYMBOLS 1 Core sand removal apparatus 10 Frame 20 Blowing part 30 Vibration generating part 40 Control part 100 Cast product 120 Spring 300 Core sand

Claims (6)

A core sand removing device for removing core sand filled in a cast product,
A frame that is supported by an elastic body and on which the cast product is placed;
A striking portion that is fixed to the frame and strikes the surface of the cast product from above to below;
A vibration generating unit fixed to the frame, and causing the frame to vibrate to be raised or lowered;
A control unit for controlling the driving of the striking unit and the vibration generating unit,
The controller is
While driving the striking part, control to drive the vibration generating part,
Control that causes the casting product to be struck from above by the striking part at the timing when the acceleration during the vibration of the frame body by the vibration generating part becomes maximum, and / or a drop in the vibration of the frame by the vibration generating part At the timing when the acceleration at the time becomes the highest, the hitting part performs control to hit the cast product from above,
Core sand removing device that removes core sand by simultaneously hitting and vibrating vertically.   2. The core sand removing device according to claim 1, wherein the control unit controls driving of the vibration generating unit and the hitting unit by changing a vibration cycle of the vibration generating unit and a hitting cycle of the hitting unit.   The core sand removing device according to claim 1, wherein the control unit controls driving of the vibration generating unit and the hitting unit by synchronizing a vibration cycle of the vibration generating unit and a hitting cycle of the hitting unit. The striking portion includes a chisel portion that contacts the casting product, and a piston portion that impacts the chisel portion by reciprocating,
The core sand according to any one of claims 1 to 3, wherein the control unit reciprocates the piston unit in a state in which the chisel unit is in contact with the casting product in the control of driving the striking unit. Removal device. The controller is
Performing control to drive the striking part at a striking period of 25 to 40 Hz,
The core sand removing device according to any one of claims 1 to 4, wherein the vibration generator is controlled to be driven at a vibration period of 15 to 60 Hz. The core sand removing device according to any one of claims 1 to 5 , wherein the frame body holds the cast product via an elastically deformable vibration isolator.

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