KR20090118498A - Rotary casting shake-out unit - Google Patents

Abstract

PURPOSE: A rotary molding sand separator is provided to offer good usability of an outer cylinder, and to extend lifetime of the outer cylinder permanently while reducing operation cost and time. CONSTITUTION: A rotary molding sand separator includes an outer cylinder(10), an inner cylinder(20), a motor, and a roller. The outer cylinder is formed to a long cylindrical shape. The inner cylinder is formed on an inner surface of an outer container. The motor and the roller are used for rotating the outer cylinder. The inner cylinder is formed by a segment(22). A cover plate(30) is formed on an outer rib(26). The thickness of the cover plate is thinner than the thickness of a body plate.

Description

Rotary Casting Sand Separator {ROTARY CASTING SHAKE-OUT UNIT}

TECHNICAL FIELD The present invention relates to a rotary casting sand separator, and more particularly, to a rotary casting sand separator used for separating or removing sand from a casting in a casting space, a mill, or another workshop.

'Rotary casting sand separator' is a device of separating sand from casting while rotating in a rotary (rotary) method of elongated cylindrical shape, which is currently being introduced and used in Korea.

1 is a perspective view showing a conventional rotary casting sand separator of the related art.

Referring to FIG. 1, the rotary casting sand separator includes a long cylindrical outer cylinder 10, an inner cylinder 20 formed on an inner surface of the outer cylinder, and various components such as a motor and a roller for rotating the outer cylinder 10. It includes. A description of the various components of a rotary cast sand separator is disclosed in US Pat. No. 3,998,262.

The inner cylinder 20 is a plurality of segments 22 are mutually coupled to form an inner cylinder, and uses a media (MEDIA) to efficiently separate the sand from the casting. The media enters the inner cylinder and rotates like a casting, effectively separating sand from the casting.

Media (media) usually has a size of 30-40MM, has a variety of shapes, such as stars, triangles, squares, rhombuses, spheres, etc. Selected according to the company's products, and cast iron is used as the material.

Each segment 22 constituting the inner cylinder is formed with an inner rib 22 in an oblique direction for moving the casting in one direction as the inner cylinder rotates, and sand separated from the casting is formed in the outer cylinder and the outer cylinder 20. A plurality of through holes 28 are formed in the surface so as to fall between the cylinders 10, and outer ribs 26 are formed so that the fallen sand moves in a direction opposite to the movement direction of the casting. The direction of the inner ribs 22 and the direction of the outer ribs 26 are usually formed in opposite directions, in order to reverse the moving direction of the casting and the sand moving away from each other.

After the media moves through the inner cylinder like a casting on the inlet side, it falls between the outer cylinder and the inner cylinder through a hole (not shown) formed in the inner cylinder on the outlet side, and again moves along the guide of the outer rib to the inlet side, The sand is discharged from the outer cylinder through the discharge hole (not shown), but the media has a recycled structure that is inserted into the inner cylinder again.

Although not shown, each segment 22 is mutually coupled by means of fitting (by tongue and pocket), with a pin (not shown) inserted therebetween. Since the segments are tightly fixed to each other by the pins, the continuous rotational movement of the rotary casting sand separator prevents the segments from loosening with each other. It is possible to prevent the departure. The combination of each segment is known from Korean Patent Publication No. 10-2007-0016980 and US Pat. No. 4,502,808.

That is, the inner cylinder 20 is formed by combining the segments 22 one by one in order to form a piece, and welding the first segment to a stopper (not shown) formed on one inner surface of the outer cylinder. After joining, the inner cylinder is formed by sequential mutual coupling of the segment with other segments. The other side of the outer cylinder 10 is fitted with a cylindrical ring to fix the segments so that they do not move, and the inner ring of the outer cylinder is coupled to the outer cylinder by tightly fixing the inner cylinder by bolts. Accordingly, the inner cylinder 20 is in close contact with the inner surface of the outer cylinder 10 so that the inner cylinder 20 also rotates as the outer cylinder 10 rotates.

In the conventional rotary casting sand separator configured as described above, when a casting having sand is attached to one end of the inner cylinder 20, the casting moves to the other end of the inner cylinder as the inner cylinder rotates, and the inner cylinder 20 The sand is released from the casting because it rotates continuously, and the separated sand is dropped between the inner cylinder and the outer cylinder through the through hole (28). The fallen sand moves along the outer ribs of the inner cylinder in a direction opposite to the movement direction of the casting so that the casting and the sand are separated. The media also moves along the outer ribs in the opposite direction to the casting's direction of movement, but the media is recycled to form a repeating process, but the sand is recovered through a vent hole at the inlet side.

Such a conventional rotary casting sand separator has a big problem that the whole machine must be replaced even if the inside of the outer cylinder is partially worn when used for about 3 to 5 years. Sand and media falling between the inner cylinder and the outer cylinder continue to damage the inner surface of the outer cylinder as the outer cylinder continues to rotate.In general, the damage is severe after 3-5 years. There was a big problem to do.

In order to replace the outer cylinder, the inner cylinder had to be separated by each segment, and the inner cylinder had to be removed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to permanently extend the life of the outer cylinder, and to provide a rotary casting sand separator which does not need to replace the outer cylinder which is the machine body.

It is another object of the present invention to provide a rotary casting sand separator that can replace only a part of a component of the rotary casting sand separator when it is broken or worn, thereby dramatically reducing the replacement cost and significantly reducing the replacement work time. .

The present invention is to achieve the above object, the rotary casting sand separator of the present invention for separating sand from the casting a plurality of segments 22 are mutually coupled to form an inner cylinder 20, the segment 22 The cover plate 30 is formed on the outer rib 23 formed on the outer body plate 23 of the outer plate 23, the segments 22 are mutually coupled to each other, the cover plate 30 is in close contact with each other the inner cylinder 10 inner surface It is composed so that sand does not fall.

Preferably, in order to improve the economics, the thickness of the cover plate is smaller than the thickness of the body plate, more preferably the thickness of the cover plate is preferably about 40-50% of the body plate thickness.

Preferably, the cover plate is integrally formed in the segment by casting production.

As described above, the rotary casting sand separator of the present invention attaches a cover plate to each segment constituting the inner cylinder so that sand and media separated from the casting do not come into contact with the inner surface of the machine body, that is, the outer cylinder. As a result, it is possible to prevent breakage or wear of the outer cylinder by sand and media. Since the inner cylinders are joined to each segment, the outer cylinder that takes excessive cost and work time in the event of abrasion or damage caused by sand. It is possible to replace and repair only worn segments without the need for replacement, which significantly reduces the replacement cost and replacement time.

Hereinafter, with reference to the accompanying drawings will be described in more detail the rotary casting sand separator of the present invention.

2 is a perspective view of a rotary casting sand separator according to a preferred embodiment of the present invention.

Referring to Figure 2, the rotary casting sand separator of the present invention, as in the prior art, for rotating the outer cylinder 10 of the long cylindrical outer cylinder and the inner cylinder 20 formed on the inner surface of the outer cylinder and in addition to the outer cylinder 10 Various components, such as a motor and a roller, are included.

The difference is that the cover plate 30 is formed in the outer rib 26 in each segment 22 constituting the inner cylinder of the present invention.

Preferably, in order to improve economics, the thickness of the cover plate is smaller than the thickness of the body plate, more preferably the thickness of the cover plate is preferably about 40-50% of the body plate thickness. This is because the casting passes through the inner cylinder, so that the wear rate of the body plate is higher than the wear rate of the cover plate. Thus, the thickness of the body plate having a high wear rate is made thicker to save material costs.

The cover plate 30 is preferably formed integrally with the segment 22 by casting. This is also to reduce the manufacturing cost and to promote economics.

Each segment 22 is joined together to form an inner cylinder 20, in which the inner ribs 24 and the outer ribs 26 are formed, respectively. The inner rib 24 is for moving the casting in one direction as the cylinder rotates, and the outer rib 26 is for moving sand and media separated from the casting in a direction opposite to the moving direction of the casting.

In the present invention, the cover plate 30 is formed on the outer rib 26 of each segment, and as each segment is bonded to each other to form the inner cylinder 20, so that the cover plate 30 is also in close contact with each other to form a cylinder. It is composed.

A conventional rotary casting sand separator wears the outer cylinder by moving along the guide of the outer rib between the inner surface of the outer cylinder and the outer surface of the inner cylinder after the sand from the casting passes through the through hole 28 of the segment 22. On the contrary,

In the present invention, since the cover plate 30 blocks the sand passing through the through hole 28 of the segment 22, the casting plate is not directly in contact with the inner surface of the outer cylinder 10, but is cast along the guide of the outer rib 26. It moves in the opposite direction to the moving direction of. Since the sand and the media do not come into contact with the outer cylinder 10, the inner surface of the outer cylinder does not wear or break due to the sand and the media, and the life of the outer cylinder 10 is extended, so that the replacement time of the outer cylinder It extends indefinitely.

Since the segment 22 is a plurality of segments 22 are coupled to each other to form the inner cylinder 20, if a portion of the segment breaks or wears out, only the part can be replaced. As such, when the cover plate also needs to be replaced due to sand breakage or abrasion, it is not necessary to replace the entire segment, but only a partially broken segment can be replaced, thereby significantly reducing the replacement cost or replacement time. Will be.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and in the technical field to which the present invention pertains that substitutions, modifications, and conversions can be made without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

1 is a schematic perspective view of a conventional rotary casting sand separator.

2 is a perspective view of a rotary casting sand separator according to a preferred embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

10: outer cylinder

20: inner cylinder

22: segment

23: body plate

24: inner rib

26: outer rib

28: through

30: cover plate

Claims (3)

In a rotary casting sand separator that separates sand from the casting, A plurality of segments 22 are coupled to each other to form the inner cylinder 20, the cover plate 30 is formed on the outer rib 23 formed on the outer side of the body plate 23 of the segment 22, The rotary casting sand separator, characterized in that the segments 22 are bonded to each other so that the cover plate 30 is in close contact with each other so that sand does not fall to the inner surface of the outer cylinder 10. The method of claim 1, In order to improve economy, the thickness of the cover plate is less than the thickness of the body plate rotary casting sand separator, characterized in that. The method of claim 1, The cover plate is a rotary casting sand separator, characterized in that formed integrally on the segment by the production of casting.

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