JP2002103020A - Method and apparatus for recovering disagregated molding sand - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for recovering disagregated molding sand and its apparatus by which the occurrence of dusting caused by dropping of the molding sand is prevented, the vibration is minimized to prevent the deterioration of a working environment, and the molding sand characteristic can be stabilized. SOLUTION: The disagregated/separated molding sand and the brushed-down sand are recovered by using a bucket vessel, and these sands are conveyed with a bucket vessel, and the reusable molding sand and the brushed-down sand are sorted and recovered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of crushing a poured sand mold removed from a casting flask to separate it into a molding sand and a casting.
The present invention relates to a method and an apparatus for recovering a molding sand for recovering molding sand.

[0002]

2. Description of the Related Art Conventionally, a poured sand mold that has been removed from a frame is crushed by a shakeout machine and separated into casting sand and a casting, and the casting sand is transported and collected by a belt conveyor or a vibrating conveyor for a long distance. It is generally done.

[0003]

However, in the above-mentioned collection of foundry sand, in the case of using a belt conveyor, sand is spilled from the belt, causing dust to be generated. In the case of using a vibration conveyor, it causes ground vibration and air vibration, and in any case, there is a problem that the working environment is deteriorated. In addition, the above collection of foundry sand collects not only reusable foundry sand, but also collects sand that has adhered to the casting and has been removed and collapsed core sand. In such a case, there is a problem that the properties of the sand become unstable. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and is an unmolded casting capable of preventing generation of dust due to sand spills, minimizing vibration, preventing deterioration of a working environment, and stabilizing sand properties. An object of the present invention is to provide a method and an apparatus for collecting sand.

[0004]

In order to achieve the above-mentioned object, a first method of recovering the unmolded molding sand according to the present invention is to provide a method of recovering a molten metal poured from a flask into a molding sand and a casting. And removing the adhered sand and / or collapsed core sand adhering around the casting while transporting the separated casting sand and the casting. Removing the casting sand and scouring sand from the casting sand and scouring sand and collecting the casting sand and scouring sand in a bucket container; and moving the bucket container in which the casting sand and scouring sand have been collected to an upper position of a collection sand receiving hopper. Transferring the foundry sand and scouring sand to a collection sand receiving hopper.

In a second method for recovering the unmolded molding sand, a poured sand mold removed from the flask is separated into a molding sand and a casting, and the separated molding sand is transferred to a first bucket container. Recovering, moving the first bucket container having recovered the foundry sand to an upper position of the recovered sand receiving hopper, and then transferring the foundry sand to the recovered sand receiving hopper; and performing casting while transporting the casting. Removing the attached sand and / or collapsed core sand adhering around the article; removing the cast article from the removed sand and collecting the removed sand in a second bucket container; It is characterized by having.

[0006] Further, a first apparatus for recovering a molding sand from a casting mold according to the present invention is a mold releasing means for separating a poured sand mold removed from the molding flask into molding sand and a casting, and the mold releasing means. A vibration conveyor that is disposed downstream of the conveyor and removes adhered sand and / or collapsed core sand adhering around the casting while conveying the casting sand and the casting, and a casting on the vibration conveyor. Casting product taking-out means for removing casting sand and scouring sand, a bucket container for collecting casting sand and scouring sand on the vibrating conveyor, a conveyor for transferring the bucket container, and a bucket container on the conveying conveyor. And sand transfer means for transferring the foundry sand and the scouring sand to the recovered sand receiving hopper.

[0007] A second apparatus for recovering the unsealed molding sand is provided with a unraveling means for separating the poured sand mold removed from the flask into molding sand and a cast product. A first bucket container that is disposed so as to be capable of entering and exiting, and that collects the separated foundry sand, a conveyor that transfers the first bucket container, and a first bucket container on the conveyor that is moved,
Sand transfer means for transferring casting sand to a collection sand receiving hopper; and adhering sand and / or collapsed core sand which is disposed downstream of the frame releasing means and adheres around the casting while conveying the casting. And a second bucket container for recovering the sand removed on the vibrating conveyor, a casting removal means for removing the cast on the vibration conveyor from the sand, and a second bucket container for collecting the washed off sand on the vibration conveyor. Features.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. In FIG. 1 showing the first embodiment, a mold extruder 3 for framing a poured sand mold 2 in a casting flask 1 is arranged at the center, and a frame releasing means is provided below the mold extruder 3. A shakeout machine 4 is provided. A vibrating conveyor 5 is disposed downstream of the shake-out machine 4, and an opening / closing gate 6 is provided at the tip of the vibrating conveyor 5 for blocking and opening the flow of cast iron, iron pieces, core pieces and the like. A sand outlet 7 is provided at an upstream position, and a receiving box 15 is provided at a downstream position. A large number of sand holes (not shown) are formed in the vibrating conveyor 5 at positions corresponding to the sand outlets 7, and large castings, iron pieces, core pieces, etc. that do not pass through the sand holes are provided on the vibrating conveyor. 5 and is discharged to the receiving box 15.

A manipulator 8 is disposed above the vibrating conveyor 5 as a casting removal means for taking out a casting W on the vibrating conveyor 5.
A transfer conveyor 9 composed of a roller conveyor or a movable trolley extended to an appropriate position is provided at a position below the sand outlet 7 in FIG. The bucket container 10 whose part can be opened and closed is located.

Further, a gate-shaped frame 11 is provided above the end point of the conveyor 9.
A mobile trolley 13 on which a hoist 12 is mounted is disposed on 1. A collected sand receiving hopper 14 is disposed below the end position of the movable carriage 13, and a sand cutting feeder 16 is connected to a lower end of the collected sand receiving hopper 14. In this embodiment, the portal frame 11, the hoist 12, and the movable carriage 13 constitute sand transfer means.

The operation of the above-described structure will be described. The poured sand mold 2 is removed from the casting flask 1 by the mold extruder 3 and extruded to the upper part of the shakeout machine 4 as shown in FIG. The poured sand mold 2 extruded onto the shake-out machine 4 is separated into the molding sand and the casting W by strong vibrating action and sent to the vibrating conveyor 5.

In the vibrating conveyor 5, the adhered sand and / or collapsed core sand (hereinafter referred to as “wash-off sand”) adhering to the periphery of the casting W is subjected to a vibrating action to cause the casting W to be vibrated.
Will be paid off. After that, the casting W on the vibrating conveyor 5 is taken out of the molding sand and the sand removed by the manipulator 8. At this time, if the broken part is on the vibrating conveyor 5, it is similarly removed by the manipulator 8.

On the other hand, the foundry sand and the scouring sand are transported to the tip of the vibrating conveyor 5 and fed into the bucket container 10 through the sand outlet 7. In addition, the casting
Iron pieces, core pieces and the like are collected in the receiving box 15 with the opening and closing gate 6 opened. When the receiving box 15 is replaced, the opening / closing gate 6 is closed so that the cast iron, iron piece, core piece and the like do not fall on the floor.

If the bucket container 10 becomes full of foundry sand and scouring sand during the repetition of the above operations, the conveyor 9 is operated to move the bucket container 10 to the end point position and a forklift (not shown). Alternatively, an empty bucket container 10 is carried into the starting position of the transport conveyor 9 by a bucket container return line or the like.

When the bucket container 10 filled with foundry sand and scouring sand is moved to the end position of the conveyor 9, the bucket container 10 is lifted by the hoist 12 and then collected by the movable cart 13. It is moved to the upper part of the sand receiving hopper 14, and the bucket container 1 is moved at the moving end.
The bottom plate of No. 0 is opened by opening / closing means (not shown), and the foundry sand and scouring sand are transferred to the collection sand receiving hopper 14. The foundry sand and scouring sand fed into the recovered sand receiving hopper 14 are cut out by a sand cutout feeder 16 into a sand processing line (not shown).

On the other hand, the empty bucket container 10 is returned to the end position of the conveyor 9 and then returned to a position near the start point of the conveyor 9 by a forklift or a bucket container return line (not shown). Then, when the bucket container 10 filled with the casting sand and the scouring sand is carried out from the starting point of the conveyor 9, it is carried into the starting point of the conveyor 9. As described above, since the bucket container 10 is used for transporting the sand, it is possible to eliminate sand spillage and generation of dust accompanying the sand spill, and to minimize mechanical vibration.

Next, a description will be given based on FIG. 2 showing a second embodiment. Note that FIG. 2 includes portions common to FIG. 1, and thus portions having different configurations will be described in detail. The shake-out machine 4A converts the poured sand mold 2 into molding sand and casting W.
After the casting sand is dropped from the bottom, the casting sand is dropped and discharged from the bottom. The manipulator 8A transfers the casting W on the shake-out machine 4A onto the vibrating conveyor 5 and casts it on the vibrating conveyor 5. The product W is taken out. The transfer of the cast product W from the shakeout machine 4A to the vibrating conveyor 5 by the manipulator 8A is performed by casting, iron pieces, core pieces, etc. (particularly core pieces) due to the strong vibration action of the shakeout machine 4A. This is for preventing a piece from dropping and discharging together with the molding sand from the bottom of the shakeout machine 4A.

The sand outlet 7 at the end of the vibrating conveyor 5 in the first embodiment is a scraping sand outlet 7A in the second embodiment. Further, the transport conveyor 9A is extended to an appropriate position starting from a position below the shakeout machine 4A. In addition to the transfer conveyor 9A, a transfer conveyor 9B is provided extending from a position below the sand removal port 7A as a start point to an appropriate position, and the first bucket container 1 is provided at the start position of the transfer conveyor 9A.
0A, the second bucket containers 10B are arranged at the starting points of the transfer conveyor 9B. Other configurations are first
It is the same as that of the embodiment.

The operation of the above-described structure will be described. The poured sand mold 2 is extruded from the casting flask 1 by the mold extruder 3 and dropped onto the upper part of the shakeout machine 4A. The poured sand mold 2 that has fallen into the shake-out machine 4A is subjected to a strong vibration action and is separated into molding sand and a casting W.
It is dropped and discharged to 0A and collected, and operates in the same manner as the bucket container 10 of the first embodiment. On the other hand, casting W
The shaker is transferred from the shakeout machine 4A to the vibration conveyor 5 by the manipulator 8A.

In the vibrating conveyor 5, the scoured sand is shaken off from the casting W by vibrating action. Thereafter, the cast product W on the vibrating conveyor 5 is transferred to the manipulator 8A.
Removed from the sand.

On the other hand, the scoured sand is transferred to the tip of the vibrating conveyor 5 and is discharged through the scouring sand outlet 7A to the second place.
It is thrown into the bucket container 10B. Then, when the second bucket container 10B is full of the sand that has been washed off, the transfer conveyor 9B is operated to move the second bucket container 10B to a sand processing facility (not shown) and a forklift or bucket container return line (not shown). Thus, the empty second bucket container 10B is carried into the starting point position of the transfer conveyor 9B.

The recovery of cast iron, iron pieces, core pieces and the like is the same as in the first embodiment. Further, the washed off sand is separately treated by a sand treatment facility (not shown), and the reusable sand is returned to a sand treatment line (not shown) at an arbitrary timing and reused. Thereby, the amount of reusable sand returned to the sand processing line can be adjusted. As described above, the casting sand and the scouring sand are sorted and collected, and the amount of the scouring sand reusable is returned to the sand treatment line. Therefore, the sand properties of the sand treatment line can be stabilized.

In both the first embodiment and the second embodiment, the frame of the poured sand mold 2 is designed to extrude the mold downward. 4 and 4A.

Each of the bucket containers 10, 10A, 10B
Opens and closes the bottom plate to transfer the sand,
Each bucket container 10, 10A, 10B may be inverted.

Further, each of the bucket containers 10, 10A, 10A
Although only one B is prepared for exchange, a plurality of B may be prepared, and a plurality of B may be placed on each conveyor and sequentially sent out.

[0026]

As is apparent from the above description, the present invention provides a step of separating a poured molten sand mold from a flask into a molding sand and a casting, and the separated molding sand and the casting. Removing contaminated sand and / or collapsed core sand adhering around the casting while transporting the casting, removing the casting from the casting sand and the scouring sand, and removing the casting sand and the scouring sand. A step of collecting sand in a bucket container, and after moving the bucket container in which the foundry sand and scoured sand have been collected to the upper position of the collected sand receiving hopper, transfer the foundry sand and scoured sand to the collected sand receiving hopper. Since the method includes the steps (1) and (2), it is possible to eliminate sand spills and dust associated with the spills, minimize mechanical vibrations, and improve the working environment. A step of separating the poured sand mold removed from the flask into casting sand and a casting, and collecting the separated casting sand in a first bucket container; and a first bucket container collecting the casting sand. Transferring the casting sand to the collecting sand receiving hopper after transferring the casting sand to the collecting sand receiving hopper; and A step of removing child sand and a step of removing the casting from the sand and collecting the washed sand in the second bucket container. Are obtained, and various effects such as a significant decrease in defects caused by molding sand are obtained.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casting frame 2 Pouring sand mold 4 4A Shakeout machine 5 Vibrating conveyor 7 Sand outlet 7A Brushing sand outlet 8 8A Manipulator 9 9A Conveyor 9B Transfer conveyor 10 Bucket container 10A 10B First and second bucket Container 13 Moving trolley 14 Collected sand receiving hopper

Claims (4)

[Claims] 1. A step of separating a poured sand mold removed from a flask into a molding sand and a casting, wherein the separated casting sand and the casting adhere to the periphery of the casting while being transported. Removing attached sand and / or collapsed core sand;
Removing the casting from the foundry sand and scouring sand and collecting the foundry sand and scoured sand in a bucket container, and placing the bucket container having collected the foundry sand and scoured sand in the upper position of the collection sand receiving hopper. After being moved, a step of transferring the foundry sand and scouring sand to a collection sand receiving hopper,
A method for recovering unmolded molding sand, comprising: 2. A step of separating the poured sand mold removed from the flask into casting sand and a casting, collecting the separated casting sand in a first bucket container, and recovering the casting sand. After the first bucket container is moved to an upper position of the collection sand receiving hopper, the casting sand is transferred to the collection sand receiving hopper, and the adhering sand and / or adhering around the casting while transporting the casting. Or a step of removing the collapsed core sand,
Removing the casting from the sand and collecting the sand in a second bucket container. 3. A poured sand mold 2 removed from a casting flask 1.
Separating means into molding sand and a casting W, and adhering sand and / or adhering around the casting W while conveying the molding sand and the casting W, which is disposed downstream of the releasing means. A vibrating conveyor 5 for removing the collapsed core sand, a casting removing means for removing the casting W on the vibrating conveyor 5 from the molding sand and the scouring sand, and a molding sand and removing the casting sand on the vibrating conveyor 5 A bucket container 10 for collecting sand, a conveyor 9 for transferring the bucket container 10, and a bucket container 10 on the conveyor 9 for transferring casting sand and scoured sand to a collection sand receiving hopper 14. And a transfer means. 4. A poured sand mold 2 removed from a casting flask 1.
Opening means for separating the casting sand into casting sand and a casting W, a first bucket container 10A which is disposed so as to be able to enter and exit below the opening means and collects the separated casting sand, and the first bucket The conveyor 9A for transferring the container 10A and the first bucket container 10A on the conveyor 9A are moved,
Sand transfer means for transferring casting sand to the collection sand receiving hopper 14, and adhering sand adhering around the casting W and / or collapsing while being transported to the casting W and disposed downstream of the frame releasing means. A vibrating conveyor 5 for removing core sand,
A frame removal device comprising: a casting removal means for removing the casting W on the vibrating conveyor 5 from the scrubbed sand; and a second bucket container 10B for collecting the scrubbed sand on the vibrating conveyor 5. Casting sand recovery device.