JP3230733B2 - Crushing / separation device for hollow mold - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for crushing and separating a casting mold which has been poured and separates it into a casting and molding sand.

[0002]

2. Description of the Related Art Conventionally, as a method of disintegrating a casting mold and a casting sand by pulverizing a poured blanking mold, a molten metal is poured on a vibrating conveyor type shakeout machine having a bottom surface formed of a sieve lattice. The shaping mold is sent out and moved while applying vibration to the shaping mold, so that the crushed molding sand is dropped from the sieve lattice, and the casting is discharged from the end of the shakeout machine.

[0003]

However, the above-mentioned crushing and separation of the poured frameless mold using the shake-out machine as described above requires a mold having a different ratio of molding sand to the casting (sand metal ratio) or a mold having a different sand property. In the casting line which handles, the amount of so-called sand taken out together with the casting from the upper part of the sieve lattice of the shake-out machine becomes different. When the amount of sand taken out from the upper part of the sieve grid increases, the amount of sand retained in the molding sand on the shakeout machine also increases, and the vibration acceleration of the shakeout machine decreases. If the vibration acceleration is reduced, there is a problem that the sand falls off the sieve grid and the amount of sand taken out from the sieve grid increases, resulting in a vicious cycle. Also, if the casting sand falls out of the sieve grid of the shake-out machine quickly, the cast product is violently vibrated, and there is a problem that a dent is formed on the cast product. The present invention has been made in view of the above problems, and even when there is a variation in the sand metal ratio or sand properties of the molding frame, the amount of molding sand taken out from the upper part of the sieve lattice of the shakeout machine is constant. It is an object of the present invention to provide a device for crushing and separating a hollow frame.

[0004]

Means for Solving the Problems In order to achieve the above-mentioned object, a crushing / separating apparatus for a frame-forming mold according to the present invention is fixed at one end so as to be rotatable up and down by a pin, and at the other end via an elevator. The bottom of the vibrating trough having one end as an inlet and the other end as a sieve lattice, and a vibrating motor connected to an inverter at the lower part are discharged from a frame provided so as to be able to be stopped at the middle, lower three positions. A shake-out machine attached with the launch angle inclined forward to generate a component force in the feed direction with respect to the outlet is suspended swingably via a spring body, and sand is provided at the lower end of the sieve lattice near the discharge port. A sampling port is provided, and a rotating blade type measuring vessel is arranged below the sand sampling port so that the weight of the sampled sand can be measured via a load cell, and the vibration connected to the load cell, the elevator, and the inverter. It is characterized in that electrically connects the chromatography data via the controller.

[0005]

Embodiments of the present invention will be described below in detail with reference to the drawings. One end is fixed by a pin 1 so as to be vertically rotatable, and the other end is a first cylinder 2A.
And a second cylinder 2B.
Is provided. Note that positioning stoppers 4 and 4 are provided at the upper and lower positions at the other end of the frame 3. A shake-out machine 5 is suspended from the frame 3 at a position closer to one end (a position closer to the right in FIG. 1) via spring bodies 6 and 6 so as to be swingable. Now, the shakeout machine 5 will be described in detail. The bottom surface of a vibrating trough 53 having one end as an inlet 51 and the other end as an outlet 52 is formed as a sieve lattice 54, and a lower portion of the vibrating trough 53 is formed as a chute 55. The vibrating motor 56 is mounted with the launch angle tilted forward to generate a component force in the feed direction. The vibration motor 5
Reference numeral 6 indicates that the frequency (the number of rotations) can be switched between three stages described later by the inverter 26. The overall structure of the shake-out machine 5 has been described above. At the lower end of the sieve lattice 54 near the outlet 52, a cylindrical sand sampling port 5A for extracting a part of the casting sand is provided.

On the outside of the inlet 51 of the shake-out machine 5, there is provided a blanking mold feeding machine 7 for feeding out the blanking mold S by extrusion, with its front end facing the inlet 51. Now, the blanking mold feeding machine 7 will be described in detail. A push-up cylinder 9 is arranged below a roller conveyor 8 for transporting the poured mold with a frame, and a pull-up plate 10 is fixed to the tip of the piston rod. Above the roller conveyor 8, there is arranged a trough 11 with its front end facing the inlet 51, and an opening through which a blanking mold S that can be pulled up together with the pulling-up plate 10 can pass below the trough 11. Is notched. Further, the base end of the trough 11 is provided with a blanking mold S which has been pulled up and carried into the trough 11.
Plate 1 connected to cylinder 12 that pushes
3 are arranged. An apron conveyor 14 for receiving and transferring the casting W is disposed outside the discharge port 52 of the shake-out machine 5. Further, below the sand sampling port 5A, a support frame 17 having one end fixed vertically rotatable by a pin 15 and the other end lower portion mounted on a load cell 16 is provided. , A rotating blade-type measuring vessel 18 having a large number of blades radially mounted between two disks is supported so as to be vertically rotated at a constant speed by a motor (not shown). Reference numeral 19 denotes an air blow nozzle for removing adhering foundry sand.

The load cell 16 is electrically connected to a first cylinder 2A of the elevator 2 and a vibration motor 56 connected to the second cylinder 2B and the inverter 26 via a controller 20, so that the weight of the sampling sand is reduced. In a large case, the first cylinder 2A and the second cylinder 2B are both extended to make the vibration trough 53 uphill (for example, 2.5 degrees), and the frequency of the inverter 26 is, for example, 60 Hz.
The vibration force of the vibration motor 56 at this time is 1.44
F, the launch angle becomes 77.5 degrees, and when the sampling sand weight is medium, the first cylinder 2A is contracted and the second cylinder 2B is extended, so that the vibration trough 53 is brought into a horizontal state and the inverter is turned on. The frequency of 26 is, for example, 50
Hz, and the excitation force of the vibration motor 56 at this time is 1.
0F, the launch angle becomes 75 degrees, and when the sampling sand weight is small, the first cylinder 2A and the second cylinder 2B are both contracted, so that the vibration trough 53 has a downward gradient (for example, -2.5 degrees). At the same time, the frequency of the inverter 26 is set to, for example, 45 Hz, and the exciting force of the vibration motor 56 at this time is set to 0.8 F and the launch angle is set to 72.5 degrees. In addition, a spilled sand chute 21 is disposed below the hollow frame casting machine 7, and a belt conveyor 22 is provided below the chute 21. Further, sand hoppers 23 and 24 are arranged below the chute 55 of the shake-out machine 5 and the lower part of the rotating blade type measuring tub 18, respectively, and below the sand hoppers 23 and 24, above the belt conveyor 22. Vibration conveyor 2 with front end
5 are arranged.

[0008] The operation of the above-described structure will be described. The poured mold with the frame conveyed by the roller conveyor 8 is pulled out by the operation of the push-up cylinder 9 through the pull-up plate 10 into the trough 11 and the cylinder 12 is moved into the cylinder 12. Operation of the pressing plate 1
3 is moved to the left, and the blanking mold S is sent from the trough 11 to the entrance 51 of the vibration trough 53. This operation is repeatedly performed at a constant tact, and a constant number of the frame-forming molds S are always placed on the shake-out machine 5. In this state, the first cylinder 2A is contracted, the second cylinder 2B is extended, and the vibration trough 53 is in a horizontal state.
Are operated by the inverter 26 at a frequency of 50 Hz. Thereby, the blanking mold S is disintegrated by the vibration of the shake-out machine 5, and the sand formed into the sand is
And is collected via the chute 55, the sand hopper 23 and the vibration conveyor 25.

On the other hand, the casting W advances on the sieve lattice 54 while being separated from the casting sand, is discharged from the discharge port 52, is received by the apron conveyor 14, and is transferred to the subsequent process. At this time, the casting sand also falls from the sand sampling port 5A, enters the rotating blade type measuring vessel 18 rotating at a constant speed, and is discharged by gravity after a certain time. For this reason, the amount of sampling sand is continuously measured by the load cell 16, and when the amount is medium (small amount), the state is kept as it is. When the amount is large (large), the first cylinder 2A and the When the two cylinders 2B are both extended to tilt the vibrating trough 53 uphill, the frequency of the vibrating motor 56 is set to 60 Hz by the inverter 26, and conversely, when the amount of sampling sand is small (there is almost no sand), First cylinder 2
A and the second cylinder 2B are both contracted and the vibration trough 5
3 is tilted in a downward slope state, and the frequency of the vibration motor 56 is set to 45 Hz by the inverter 26. As a result, the amount of sand taken out together with the casting W from the sieve lattice 54 is corrected, and the blanking mold S is stabilized (without dents on the casting W) and crushed and separated.

The exciting force of the vibration motor 56 is 2 times the frequency.
Since the frequency is proportional to the power, the change of the frequency greatly affects the crushing ability of the shake-out machine 5. That is, the vibration motor 5
Since 6 has a feed angle, changing the frequency also greatly changes the feed speed (residence time of the blanking mold S).
Therefore, as described above, by changing the attitude of the vibrating trough 53 and the frequency of the vibrating motor 56 in combination and driving, the feed speed can be kept substantially constant even when the exciting force is largely changed. Therefore, when a blanking mold S having a different sand metal ratio is sent or a blanking mold S having a different sand property is sent, the vibration trough 5 is immediately sent.
By changing the frequency of the vibration motor 56 by the posture 3 and the inverter 26, the crushing of the hollow mold and the sand separation are performed while keeping the amount of sand taken out constant.

[0011]

As is apparent from the above description, the present invention makes it possible to adjust the inclination angle via an elevator and to lower the lower end of the sieve lattice of a shake-out machine suspended via a spring body near the outlet. A vibration motor provided with a sand sampling port and a rotating blade type measuring vessel arranged below the sand sampling port so that the weight of the sampled sand can be weighed via a load cell, and connected to the load cell and the inverter of the elevator and the shakeout machine. Are electrically connected to each other via a controller. it can.

[Brief description of the drawings]

FIG. 1 is a vertical sectional front view of a main part cutout showing an embodiment of the present invention.

[Explanation of symbols]

 1 Pin 2 Elevator 3 Frame 5 Shake-out Machine 5A Sand Sampling Port 6 Spring Body 7 Frame Insertion Machine 16 Load Cell 18 Rotating Blade Type Measuring Meas 20 Controller 26 Inverter 51 Inlet 52 Outlet 53 Vibration Trough 54 Sieve Grid 56 Vibration Motor S Unframed mold W Cast product

Claims (2)

(57) [Claims] 1. One end is connected to a frame 3 which is fixed at one end by a pin 1 so as to be vertically rotatable and the other end can be stopped at an upper, middle and lower three-stage position via an elevator 2. The bottom surface of a vibrating trough 53 having the other end as a discharge port 52 is formed in a sieve lattice 54 and an inverter 26
A shake-out machine 5 provided with a vibrating motor 56 connected to the discharge port 52 inclined forward to generate a component force in the feed direction with respect to the discharge port 52 is swingably suspended via spring bodies 6 and 6. A sand sampling port 5A is provided at the lower end of the sieve lattice 54 near the discharge port 52, and a rotating blade type measuring box 18 is disposed below the sand sampling port 5A via a load cell 16 so that the weight of the sampled sand can be measured. , The load cell 16, the elevator 2 and the inverter 2
6. An apparatus for crushing and separating frameless molds, wherein the vibration motor 56 connected to the apparatus 6 is electrically connected via the controller 20. 2. The inlet 51 of the shake-out machine 5
2. The apparatus for crushing and separating frameless molds according to claim 1, wherein a front end of the frameless mold feeding machine 7 is disposed.