JP3236223U - Blade structure for casting sand recycling and casting sand recycling equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blade structure for regenerating cast sand, which can be reduced in weight and extended in life.
A blade structure 3 is detachably attached to a first divided body 21 having a first annular plate 31 and a first divided body 21, and is attached to a second annular plate 31 so as to be opposed to the first annular plate 31. The annular plate 32 is located between the first annular plate 31 and the second annular plate 32, and the second divided body 22 having a tubular portion 33 having one shaft end side connected to the outer peripheral portion of the plate 32 and the second annular plate 32. A plurality of ceramic blade plates 23 arranged along the circumferential direction are provided.
[Selection diagram] Fig. 2

Description

The present invention relates to a blade structure for regenerating cast sand and a cast sand reclaimer including the blade structure.

As a conventional cast sand reclaiming device, a rotor including a rotor and a blade structure in which an upper end portion thereof is arranged above the upper end portion of the rotor is generally known (see, for example, Patent Documents 1 and 2). ). As the blade structure 103, for example, as shown in FIG. 8, an annular bottom plate 131, an annular upper plate 132 arranged to face the bottom plate 131, an outer peripheral portion of the bottom plate 131, and an outer peripheral portion of the upper plate 132. A cast product integrally provided with a tubular portion 133 connecting the portions and a plurality of blade plates 123 arranged between the bottom plate 131 and the upper plate 132 along the circumferential direction of the plates 131 and 132. Is often adopted. Then, in the casting sand recycling device, the casting sand thrown into the inside of the blade structure 103 is polished by rubbing the sand grains against each other due to the rotation of the rotor, and is scattered in the centrifugal direction to each space of the blade structure 103. Regeneration processing is performed by repeatedly contacting and polishing a plurality of blade plates 123 while being housed in the portion.

Japanese Unexamined Patent Publication No. 07-314082 Japanese Unexamined Patent Publication No. 10-08595

However, in the conventional cast sand reclaiming device, since the blade structure 103 made of cast metal is adopted, the blade structure 103 is very heavy, it takes time to attach it to the device, and its workability is poor. Further, the blade structure 103 (particularly each blade plate 123 and bottom plate 131) becomes unusable in about 90 days due to wear, and replacement work is required four times a year. Along with this, there will be a loss of operation stoppage of the remanufacturing device and a high replacement cost.

The present invention has been made in view of the above-mentioned current situation, and an object of the present invention is to provide a blade structure for regenerating cast sand, which can reduce the weight and extend the life, and a cast sand reclaiming apparatus provided with the blade structure. ..

The present invention is as follows.
1. 1. The first partition having the first annular plate and
A second divided body that is detachably attached to the first divided body and has a second annular plate facing the first annular plate and a tubular portion having one shaft end side connected to the outer peripheral portion of the second annular plate. When,
A blade structure for recycling cast sand, which comprises a plurality of ceramic blade plates arranged between the first annular plate and the second annular plate along the circumferential direction of the annular plate. body.
2. 2. A holding claw having a substantially U-shaped cross section into which the blade plate can be inserted from the inside of the annular plate is attached to each of the facing surfaces of the first annular plate and the second annular plate. The blade structure for reclaiming cast sand according to.
3. 3. The outer peripheral portion of the first annular plate is provided with a vertical wall into which the other shaft end side of the tubular portion is fitted. Or 2. The blade structure for reclaiming cast sand according to.
4. By inserting a threaded portion of a bolt into a through hole formed in the first annular plate and the second annular plate and screwing a nut into the threaded portion, the second division is made with respect to the first division. The body is detachably attached. To 3. The blade structure for recycling cast sand according to any one of the above items.
5. A surface treatment layer for enhancing wear resistance is provided on the sand contact surface of the first annular plate. To 4. The blade structure for recycling cast sand according to any one of the above items.
6. A holding claw having a substantially U-shaped cross section into which the blade plate can be inserted from the inside of the annular plate is attached to each facing surface of the first annular plate and the second annular plate, and the first annular plate is attached. A vertical wall into which the other shaft end side of the tubular portion is fitted is provided on the outer peripheral portion of the above, and the screw portion of the bolt is inserted into the through holes formed in the first annular plate and the second annular plate. By screwing a nut into the threaded portion, the second divided body is detachably attached to the first divided body, and the sand contact surface of the first annular plate has wear resistance. The above 1. The blade structure for reclaiming cast sand according to.
7. The blade structure for reclaiming cast sand according to any one of claims 1 to 6, wherein the rotor and the upper end portion thereof are arranged at a position higher than the upper end portion of the rotor. Casting sand recycling equipment.

According to the blade structure for regenerating cast sand of the present invention, a first annular plate having a first annular plate and a second annular plate that is detachably attached to the first annular plate and faces the first annular plate. A plurality of second divided bodies having a tubular portion having one shaft end side connected to the outer peripheral portion of the second annular plate, and a plurality of portions along the circumferential direction of the annular plate between the first annular plate and the second annular plate. It is provided with a blade plate made of ceramics to be arranged. As described above, by providing the blade plate made of ceramics having excellent wear resistance between the first divided body and the second divided body, it is possible to reduce the weight and extend the life of the blade structure. Therefore, the replacement time of the blade structure with respect to the device can be shortened, and the workability thereof can be improved. Further, in the state where the second divided body is not attached to the first divided body, the blade structure can be further changed by changing the direction of the blade plate and rearranging the blade plate or replacing the blade plate with a new one. It is possible to extend the service life. As a result, the loss of operation stoppage of the device and the replacement cost of the blade structure are suppressed.

According to the cast sand reclaiming apparatus of the present invention, the rotor is provided with a rotor and a blade structure for reclaiming the cast sand whose upper end is arranged at a position higher than the upper end of the rotor. As described above, by providing the blade plate made of ceramics having excellent wear resistance between the first divided body and the second divided body, it is possible to reduce the weight and extend the life of the blade structure. Therefore, the replacement time of the blade structure with respect to the device can be shortened, and the workability thereof can be improved. Further, the length of the blade structure can be increased by changing the direction of the blade plate and rearranging the blade plate or replacing the blade plate with a new one in a state where the second divided body is not attached to the first divided body. The life can be extended. As a result, the loss of operation stoppage of the device and the replacement cost of the blade structure are suppressed.

The present invention will be further described in the following detailed description with reference to the plurality of references mentioned with reference to non-limiting examples of typical embodiments according to the present invention. Similar parts are shown through several figures.
It is a vertical sectional view of the cast sand recycling apparatus which concerns on embodiment. It is a perspective view of the blade structure which concerns on embodiment. It is a top view of the blade structure. It is an enlarged view of the main part of FIG. FIG. 3 is a sectional view taken along line VV of FIG. 3, where FIG. 3A shows an assembled state and FIG. 3B shows a disassembled state. It is a perspective view of the 1st division body which concerns on embodiment. It is a perspective view of the blade plate and the holding claw which concerns on embodiment. It is a perspective view of the main part of the conventional blade structure.

The matters shown here are for illustrative purposes and embodiments of the present invention, and are considered to be the most effective and effortless explanations for understanding the principles and conceptual features of the present invention. It is stated for the purpose of providing what seems to be. In this regard, it is not intended to provide more than a certain amount of structural details of the present invention necessary for a fundamental understanding of the present invention, and some forms of the present invention may be described by description in conjunction with the drawings. It is intended to clarify to those skilled in the art how it is actually realized.

Hereinafter, the present invention will be specifically described with reference to the drawings.

As shown in FIG. 1, the cast sand recycling apparatus 1 according to the present embodiment has a rotatable rotor 2 and a blade structure 3 whose upper end is arranged at a position higher than the upper end of the rotor 2. I have. The rotor 2 is arranged so as to face the opening of the donut-shaped blade structure 3. Further, the blade structure 3 is fixedly arranged with respect to the device 1. Further, the blade structure 3 is arranged so as to surround the rotor 2 when viewed from the axial direction of the rotor 2.

The foundry sand reclaiming device 1 includes a tank 5 for accommodating a rotor 2 and a blade structure 3. A support portion 6 for fixing the blade structure 3 is provided on the side wall of the tank 5. A gap 7 through which polished casting sand can pass is formed between the support portion 6 and the rotor 2. Further, a bearing portion 9 is fixed in the tank 5 by a radial support arm 8. A rotation shaft 2a of the rotor 2 is pivotally supported by the bearing portion 9. The rotary shaft 2a is connected to a drive shaft of a drive motor (not shown) via a pulley 11 and a belt 12. Further, the top plate of the tank 5 is provided with a supply pipe 13 for supplying the used casting sand to the inside of the blade structure 3.

As shown in FIGS. 2 to 5, the blade structure 3 according to the present embodiment includes a first divided body 21 and a second divided body 22 that is detachably attached to the first divided body 21 by a bolt 35. , Is equipped. The first divided body 21 has a first annular plate (bottom plate) 31. Further, the second divided body 22 includes a second annular plate (upper plate) 32 facing the first annular plate 31 and a tubular portion 33 having one shaft end side welded to the outer peripheral portion of the second annular plate 32. have.

The blade structure 3 is a ceramic blade arranged between the first annular plate 31 and the second annular plate 32 along the circumferential direction of the annular plates 31 and 32 (18 in FIG. 3). It is equipped with a plate 23. Each of these blade plates 23 is arranged so as to be inclined with respect to the radial direction of the first and second annular plates 31 and 32. Further, each blade plate 23 is formed in a rectangular plate shape (see FIG. 7). Further, the blade structure 3 has a plurality of space portions 24 which are partitioned by the facing surfaces of the annular plates 31 and 32, the inner peripheral surface of the tubular portion 33, and the surface of each blade plate 23 and open inward. (See FIG. 2).

A holding claw 26 having a substantially U-shaped cross section into which a blade plate 23 can be inserted from the inside of the annular plates 31 and 32 is welded to each facing surface of the first annular plate 31 and the second annular plate 32 (FIG. 7). Further, on the outer peripheral portion of the first annular plate 31, a vertical wall 27 into which the other shaft end side of the tubular portion 33 is fitted (inrowed) is provided (see FIG. 5). Further, a plurality of through holes 28 (two in FIG. 2) through which the screw portion 35a of the bolt 35 is inserted are formed in each of the first annular plate 31 and the second annular plate 32. By inserting the threaded portion 35a of the bolt 35 into each through hole 28 of the first annular plate 31 and the second annular plate 32 and screwing the nut 36 into the threaded portion 35s, the first divided body 21 can be screwed. The second divided body 22 is detachably attached.
In FIG. 5, only one blade plate 23 and the corresponding upper and lower holding claws 26 are described, and the description of the other blade plate 23 and the holding claw 26 is omitted.

A surface treatment layer 29 for enhancing wear resistance is provided on the sand contact surface of the first annular plate 31 (that is, the surface of the first annular plate 31 facing the second annular plate 32) (see FIG. 6). ). Examples of the surface treatment layer 29 include a metal film treatment layer by electroplating, physical vapor deposition, chemical vapor deposition, etc., a non-metal film treatment layer by resin lining, ceramic coating, etc., a surface hardening treatment layer by quenching, nitriding treatment, etc. Available.

Next, the operation of the cast sand reclaiming device 1 having the above configuration will be described. As shown in FIG. 1, in a state where the rotor 2 is rotating at high speed, the used casting sand S is supplied from the supply pipe 13 to the inside of the blade structure 3. Then, the cast sand S is polished by rubbing the sand grains against each other due to the rotation of the rotor 2, and is scattered in the centrifugal direction and is accommodated in each space 24 of the blade structure 3 and repeatedly contacts each blade plate 23. It is regenerated by being polished. The regenerated cast sand S is dropped downward through the gap 7 and recovered.

Generally, when the sand contact surface of the blade plate 23 is worn due to the long-term operation of the cast sand reclaiming device 1, effective reclaiming treatment becomes difficult. On the other hand, in the present casting sand recycling apparatus 1, when the operation reaches a predetermined time, the bolt 35 and the nut 36 are loosened in the blade structure 3 and the second divided body 22 is attached to the first divided body 21. The blade plate 23 is pulled out from the holding claws 26 of the first and second annular plates 31 and 32 in a state where the above is released. Then, the direction of the blade plate 23 (specifically, the vertical direction or the front / back direction) is changed and reinserted into the holding claw 26, or the blade plate 23 is replaced with a new one and reinserted into the holding claw 26. Then, the cast sand reclaiming device 1 after the restart performs an effective reclaiming process.
The work of inserting the blade plate 23 into the holding claw 26 may be performed with the blade structure 3 set in the device 1, or may be performed with the blade structure 3 removed from the device 1. May be good.

From the above, according to the blade structure 3 for regenerating cast sand of the present embodiment, the first divided body 21 having the first annular plate 31 and the first divided body 21 are detachably attached to the first annular body 21. The second annular plate 32 facing the plate 31, the second divided body 22 having the tubular portion 33 having one shaft end side connected to the outer peripheral portion of the second annular plate 32, the first annular plate 31 and the second annular plate 32. A plurality of ceramic blade plates 23 arranged along the circumferential direction of the annular plates 31 and 32 are provided between the and. In this way, by providing the blade plate 23 made of ceramics having excellent wear resistance between the first divided body 21 and the second divided body 22, it is possible to reduce the weight and extend the life of the blade structure 3. can. Therefore, the replacement time of the blade structure 3 with respect to the device 1 can be shortened, and the workability thereof can be improved. Further, in a state where the second divided body 22 is not attached to the first divided body 21, the blade plate 23 is turned and rearranged, or the blade plate 23 is replaced with a new one. The life of the structure 3 can be further extended. As a result, the operation stop loss of the device 1 and the replacement cost of the blade structure 3 are suppressed.

Specifically, the conventional cast blade structure 103 (see FIG. 8) weighs about 30 to 40 kg, whereas the blade structure 3 of the present embodiment weighs about 17 kg. We were able to significantly reduce the weight. Further, while the conventional cast blade structure 103 can be used for about 90 days, in the blade structure 3 of the present embodiment, the blade plate 23 is rearranged by changing the direction. The usable period of the blade plate 23 is about 6 months, and by replacing the blade plate 23 with a new one, the usable period of the blade structure 3 is about 12 months, and the service life can be significantly extended. rice field.

Further, in the present embodiment, the holding claws 26 having a substantially U-shaped cross section into which the blade plate 23 can be inserted from the inside of the annular plates 31 and 32 into the facing surfaces of the first annular plate 31 and the second annular plate 32. Is attached. As a result, the detachability of the blade plate 23 with respect to the first annular plate 31 and the second annular plate 32 is enhanced.

Further, in the present embodiment, a vertical wall 27 into which the other shaft end side of the tubular portion 33 is fitted is provided on the outer peripheral portion of the first annular plate 31. As a result, the detachability of the second divided body 32 with respect to the first divided body 31 is enhanced.

Further, in the present embodiment, the threaded portion 35a of the bolt 35 is inserted into the through hole 28 formed in the first annular plate 31 and the second annular plate 32, and the nut 36 is screwed into the threaded portion 35a. The second divided body 22 is detachably attached to the first divided body 21. As a result, the detachability of the second divided body 22 with respect to the first divided body 21 is enhanced. In particular, the positions of the upper and lower holding claws 26 of the first annular plate 31 and the second annular plate 32 can be accurately aligned.

Further, in the present embodiment, a surface treatment layer 29 for enhancing wear resistance is provided on the sand contact surface of the first annular plate 31. As a result, the life of the blade structure 3 can be further extended.

It should be noted that the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention based on the purpose and application. That is, in the above embodiment, the embodiment in which the holding claw 26 for holding the blade plate 23 is retrofitted to the first and second annular plates 31 and 32 is exemplified, but the present invention is not limited to this, and for example, the first and second annular plates are not limited to this. The holding groove for holding the blade plate 23 may be formed on the annular plates 31 and 32.

Further, in the above embodiment, the embodiment in which the shaft end side of the tubular portion 33 is fitted to the vertical wall 27 on the outer peripheral portion of the first annular plate 31 is exemplified, but the present invention is not limited to this, and for example, the vertical wall 27 is not provided. The shaft end side of the tubular portion 33 may be brought into contact with the outer peripheral portion of the first annular plate 31.

Further, in the above embodiment, the embodiment in which the first and second divided bodies 21 and 22 are detachably integrated by the bolt 35 and the nut 36 is exemplified, but the present invention is not limited to this, and for example, the first and second divided bodies 21 and 22 are detachably integrated by a clamp mechanism. The second divided bodies 21 and 22 may be detachably integrated.

Further, in the above embodiment, the embodiment in which the surface treatment layer 29 is provided on the sand contact surface of the first annular plate (bottom plate) 31 is exemplified, but the present invention is not limited to this, and for example, it is added to or replaced with the first annular plate 31. The surface treatment layer 29 may be provided on the sand contact surface of the second annular plate (upper plate) 32. Further, the surface treatment layer 29 may not be provided on the sand contact surface of the first and second annular plates 31 and 32.

Further, in the above embodiment, the embodiment in which the first divided body 21 is arranged on the bottom side and the second divided body 22 is arranged on the upper side is exemplified, but the present invention is not limited to this, and for example, the first divided body 21 is arranged. May be arranged in the apparatus 1 with the upper side and the second divided body 22 as the bottom side.

The present invention is not limited to the embodiments detailed above, and various modifications or changes can be made within the scope of the claims of the present invention.

The present invention is widely used as a technique for regenerating used cast sand.

1; Cast sand regenerator, 2; Rotor, 3; Blade structure, 21; First division, 22; Second division, 23; Blade, 26; Holding claw, 27; Stand wall, 28; Through hole, 29; surface treatment layer, 31; first annular plate (bottom plate), 32; second annular plate (upper plate), 33; cylinder, 35; bolt, 36; nut.

Claims (7)

The first partition having the first annular plate and
A second divided body that is detachably attached to the first divided body and has a second annular plate facing the first annular plate and a tubular portion having one shaft end side connected to the outer peripheral portion of the second annular plate. When,
A blade structure for recycling cast sand, which comprises a plurality of ceramic blade plates arranged between the first annular plate and the second annular plate along the circumferential direction of the annular plate. body. The first aspect of claim 1, wherein a holding claw having a substantially U-shaped cross section into which the blade plate can be inserted from the inside of the annular plate is attached to each facing surface of the first annular plate and the second annular plate. A blade structure for recycling cast sand. The blade structure for regenerating cast sand according to claim 1 or 2, wherein a vertical wall into which the other shaft end side of the tubular portion is fitted is provided on the outer peripheral portion of the first annular plate. By inserting a screw portion of a bolt into a through hole formed in the first annular plate and the second annular plate and screwing a nut into the screw portion, the second division is made with respect to the first division. The blade structure for recycling cast sand according to any one of claims 1 to 3, wherein the body is detachably attached. The blade structure for regenerating cast sand according to any one of claims 1 to 4, wherein a surface treatment layer for enhancing wear resistance is provided on the sand contact surface of the first annular plate. On the facing surfaces of the first annular plate and the second annular plate, holding claws having a substantially U-shaped cross section into which the blade plate can be inserted from the inside of the annular plate are attached.
A vertical wall into which the other shaft end side of the tubular portion is fitted is provided on the outer peripheral portion of the first annular plate.
By inserting a threaded portion of a bolt into a through hole formed in the first annular plate and the second annular plate and screwing a nut into the threaded portion, the second division is made with respect to the first division. The body is detachably attached,
The blade structure for regenerating cast sand according to claim 1, wherein a surface treatment layer for enhancing wear resistance is provided on the sand contact surface of the first annular plate. With the rotor
The blade structure for regenerating cast sand according to any one of claims 1 to 6, wherein the upper end portion thereof is arranged at a position higher than the upper end portion of the rotor. Device.

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