JPH07195138A - Device for reconditioning molding sand - Google Patents

Abstract

PURPOSE:To separate the stuck material on the surface of molding sand while mutually rubbing the molding sands, by arranging a sand cylinder at the upper part of a horizontal rotating rotor, constituting a sand discharging part for reconditioning the sand and arranging a pressing plate for pressing the used sand charged into the hollow part of the sand cylinder. CONSTITUTION:The used sand S is charged into the rotor 6 and the hollow part 10A of the sand cylinder 10 from the upper part of the sand cylinder 10. The pressing plate 15 is descended by working a pressure cylinder 13 and inserted into the hollow part of the sand cylinder to pressurize the used sand S. The rotor 6 is rotated by driving a motor. The used sand in the rotor 6 is restricted with a supporting member 9 and rotated together with the rotor and on the other hand, the movement in the circular direction of the used sand S in the sand cylinder 10 is restricted with a supporting member 12. Therefore, the mutual rub of the used sands is developed between the used sand at the upper end part and the used sand at the lower end part of the hollow part in the pressed condition from the upper part, and the stuck material on the surface of the used sand S is separated and removed to recondition the molding sand. By this method, the reconditioning of the molding sand can efficiently be executed without crushing the molding sand.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reclaiming device for casting a casting and reusing the casting sand after taking out the casting.

[0002]

2. Description of the Related Art Conventionally, various devices for reclaiming foundry sand have been developed, and most of them have been developed in practice.
As disclosed in Japanese Patent No. 35328, used casting sand (hereinafter referred to as old sand) is supplied to a rotary impeller, and the supplied old sand is projected and collided toward a wall surface by the rotary impeller, so that the sand surface I try to remove the deposits. However, in such a method of reclaiming foundry sand, the impact itself is too strong (if it is weak, the deposits cannot be removed), the sand itself is crushed, and it becomes finer to increase the amount of binder added to the reclaimed sand. There was a problem. The present invention has been made in view of the above problems, and an object of the present invention is to provide a foundry sand reclaiming device that can reclaim sand efficiently in a situation where the sand is not crushed.

[0003]

To achieve the above object, a foundry sand reclamation apparatus according to the present invention is a horizontally rotatable roller in which a cylindrical side wall cylinder is integrally connected to an upper portion of a disk-shaped bottom plate. A rotor, a sand cylinder fixedly disposed above the rotor, the lower surface of which is rotatably positioned relative to the upper surface of the rotor, and the diameter of which is substantially the same as that of the sidewall cylinder, and the sand. A disc-shaped pressing plate that is arranged so as to be able to move up and down above the cylinder and has a size that can be inserted into the hollow portion of the sand cylinder, and a position between the upper surface of the side wall cylinder and the lower surface of the sand cylinder or And a sand discharge gap or a sand discharge hole provided in the side wall cylinder.

[0004]

According to the present invention, by adopting the above-mentioned solution means, old sand is introduced into the rotor and the sand cylinder from above the sand cylinder by a known method, and the old sand is pressed by the pressing plate. -When the rotor is rotated horizontally, the old sand in the sand cylinder is rotated strongly against the old sand in the rotor, causing a sliding motion near the boundary between the rotor and the sand cylinder. By the pressure and shearing action of the sands at the part, the deposits on the surface of the old sand are peeled off,
Old sand is reclaimed. The regenerated sand is sequentially discharged from the sand discharge gap between the upper surface of the rotor and the lower surface of the sand cylinder or the sand discharge hole provided in the side wall cylinder of the rotor.

[0005]

Embodiments of the present invention will now be described in detail with reference to the drawings. In FIG. 1, a bearing 2 oriented in the vertical direction is fixedly supported at a lower position of the portal frame 1 through a lower frame 3, and a rotary shaft 4 vertically penetrates through the bearing 2. Bearings. At the lower end of the rotary shaft 4, a V-
The V-puri 5 is connected to the V-puri 5 and is not shown in the figure.
It is conductively connected to the rotary shaft of the motor via a belt.
Further, the center of the lower surface of the rotor 6 is fixed to the upper end of the rotating shaft 4, and the rotor 6 is provided on the upper part of the disk-shaped bottom plate 7 and on the upper part of the cylindrical bottom plate 7 in the form of a cylindrical side wall tube. 8 is integrally connected to the rotor 6, and a support member 9 for preventing lateral movement of sand is formed in the rotor 6 so as to divide the inside of the rotor 6 into left and right parts. It is firmly fixed. (See Figure 3)

Further, a sand cylinder 10 having a hollow portion 10A penetrating vertically is provided on the upper portion of the rotor 6 and the gate frame 1 is provided.
Is fixedly mounted on an intermediate frame 1A provided in the middle portion of the above, and the sand cylinder 10 is a cylinder whose opening diameter and wall thickness of the side wall cylinder 8 are substantially the same, and the lower surface thereof is recycled sand. In order to discharge the water, the side wall cylinder 8 and the sand cylinder 10 are positioned with a slight gap from the upper surface of the side wall cylinder 8 to form a sand discharge gap 11. Further, a plurality of support members 12 for preventing lateral movement of the old sand are fixed to the lower portion of the hollow portion 10A of the sand cylinder 10 so as to project from the inner wall surface toward the central portion. There is. (See FIG. 4) Further, a pressure cylinder 13 is fixed to the ceiling frame 1B of the portal frame 1 so as to face downward, and the hollow portion is provided at the tip of the piston rod 14 of the pressure cylinder 13. A disc-shaped pressing plate 15 having a size that can be inserted into 10A is fixed. The stroke of the pressurizing cylinder 13 is separated by a distance that allows the pressing plate 15 to come out of the sand cylinder 10 at the rising end and supply the old sand to the hollow portion 10A of the sand cylinder 10, and is supported by the pressing plate 15 at the falling end. It is arranged to be slightly above the member 12. Further, reference numeral 16 in the drawing denotes a shoe for guiding the recycled sand downward.

With this construction, the old sand S is put into the rotor 6 and the hollow portion 10A of the sand cylinder 10 from above the sand cylinder 10 in the state shown in FIG. 1 by a known method. Next, the pressurizing cylinder 13 operates to lower the pressing plate 15 to move the sand cylinder 1
No. 0 is inserted into the hollow portion 10A, and the old sand S is pressurized (state of FIG. 2). While maintaining this pressure, a motor (not shown) is driven to rotate the rotor 6. At this time, the old sand S in the rotor 6 is rotated together with the rotor 6 because its movement in the circumferential direction is restricted by the support member 9, while the old sand S in the hollow portion 10A of the sand cylinder 10 is plural. The support member 12 restricts the movement in the circumferential direction. Therefore, between the sand at the upper end of the rotor 6 and the sand at the lower end of the hollow portion 10A, sand slides under pressure from above, which causes the surface of the sand S to move. The deposits are peeled off and the sand is regenerated.

Since this sand regeneration is performed by a sliding motion while being pressed from above, the sand is regenerated by eliminating the crushing of the sand and efficiently removing the deposits.
The regenerated sand moves outward under the action of the centrifugal force of the rotor 6 and is discharged from the gap between the side wall cylinder 8 of the rotor 6 and the sand cylinder 10, that is, the sand discharge gap 11, and the shoot 16 Guided by and falls and is taken out. Such operation is continued until the pressing plate 15 reaches a position slightly above the supporting member 12 of the hollow portion 10A, the driving of the motor (not shown) is stopped, the rotation of the rotor 6 is stopped, and then the pressure is applied. The cylinder 13 is reversely operated to return the pressing plate 15 to the state shown in FIG. 1, the old sand S is again supplied to the hollow portion 10A, and the above operation is repeated.

In the above embodiment, the reclaimed sand is not discharged.
The gap between the upper surface of the side wall cylinder 8 of the rotor 6 and the lower surface of the sand cylinder 10, that is, the sand discharge gap 11 is used. However, as shown in FIG. Discharge hole 1
1A may be provided so that the side wall cylinder 8 and the sand cylinder 10 are substantially in contact with each other so that the sand cannot pass therethrough and the sand is discharged only from the sand discharge hole 11A. Further, the supporting members 9 and 12 in the above-described embodiment are downsized and the rotor 6 and the sand cylinder 10 are used.
This is not necessary when the opening diameter of is small and the sand does not move laterally, and may be deleted.

[0010]

As is apparent from the above description, the present invention provides a cylindrical sand cylinder on the upper part of a horizontal rotary rotor which defines a recess by a bottom plate and a side wall cylinder, and discharges recycled sand. The sand discharging unit for the sand is formed, and the pressing plate for pressing the old sand put into the hollow portion of the rotor and the hollow portion of the rotor is arranged above the sand cylinder. The sands are made to slide under the condition of being pressed to separate the deposits on the sand surface, and the sand can be efficiently regenerated without crushing the sand.

[Brief description of drawings]

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

FIG. 2 is a vertical sectional front view showing an operating state of the embodiment of the present invention.

FIG. 3 is a view taken along the line AA in FIG.

FIG. 4 is a view taken along the line BB in FIG.

FIG. 5 is a vertical sectional front view showing another embodiment of the rotor and the sand cylinder.

[Explanation of symbols]

 6 Rotor 7 Bottom Plate 8 Side Wall Cylinder 10 Sand Cylinder 11 Sand Discharge Gap 11A Sand Discharge Hole 15 Press Plate S Old Sand

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[Procedure amendment]

[Submission date] June 24, 1994

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 3]

[Figure 4]

[Figure 5]

[Figure 1]

[Fig. 2]

Claims (2)

[Claims] 1. A horizontally rotatable rotor 6 in which a cylindrical side wall cylinder 8 is integrally connected to an upper portion of a disk-shaped bottom plate 7, and fixedly disposed on the upper portion of the rotor 6. A lower surface of the sand cylinder 10 is rotatably positioned relative to the upper surface of the rotor 6, and a sand cylinder 10 having substantially the same diameter as that of the side wall cylinder 8 is disposed above the sand cylinder 10 so as to be vertically movable. And the hollow part 1 of the sand cylinder 10
Disk-shaped pressing plate 15 sized to be inserted into 0A
And a position between the upper surface of the side wall cylinder 8 and the lower surface of the sand cylinder 10 or a sand discharge gap 11 or a sand discharge hole 11 provided in the side wall cylinder 8.
A, a sand molding reclaiming device comprising: 2. The foundry sand reclamation apparatus according to claim 1, wherein support members 9 and 12 for preventing sand rotation movement are attached inside the rotor 6 and inside the sand cylinder 10.