JPH11147159A - Chute device for transferring molding sand - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the wear of a chute cylinder even in the case of feeding molding sand having different moisture contents and the clogging of the chute cylinder caused by stuck sand by passing through and fitting pipe materials so as to be rotatable in the chute cylinder part to plural round bar shafts fixed while being arranged in a zigzag state to the upper position in the chute cylinder and penetrating the chute cylinder. SOLUTION: The chute cylinder 2 communicated with one side of an post- treatment equipment 1 of recovered molding sand, is formed having the inclining surface 5 in the inside direction at the right side of the bottom part thereof and the left side of the bottom part faced to the inclining surface 5 is used for a sand discharging hole 6, and this hole is communicated with the side surface of the post-treatment equipment 1. At the upper position in the chute cylinder 2, plural round bar shafts 7 passing through the chute cylinder 2 are arranged in the zigzag state and both end parts are fastened with nuts and fixed. The pipe materials 9 are passed through and fitted so as to be rotatable, to the round bar shafts 7 in the inner part of the chute cylinder 2, and the molding sands S dropped having the width from the tip part of a belt conveyor 4 are simultaneously collided to the pipe materials 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casting sand transfer chute apparatus for transferring casting sand, which has been cast, has been subjected to mold dispersion, and has been recovered, to a post-processing facility via a conveyor.

[0002]

2. Description of the Related Art Conventionally, as a casting sand transfer chute apparatus as described above, one bottom portion of a belt conveyor is formed on an inwardly inclined surface below the leading end of the belt conveyor, and the other bottom portion facing the inclined surface is formed on the other side. What has a chute cylinder constituted in a sand discharge mouth connected with post-processing equipment is generally used. When the casting sand is transferred from the belt conveyor to the post-processing equipment via the chute cylinder by the above casting sand transfer chute device, the water content is low (water content is 1.0% or less).
In the case of casting sand, there has been a problem that the abrasion of the inclined surface portion of the chute cylinder, at which the casting sand falls from the belt conveyor and collides, becomes severe and a hole is formed in the inclined surface.

[0003]

As a countermeasure against the above-mentioned abrasion, a sand stopper plate is provided on the inclined surface of the chute cylinder at a slight interval up and down, casting sand is accumulated between the sand stopper plates, and the casting sand is cushioned. However, in this case, when molding sand having a high moisture content (2.0% or more in moisture) is sent, the molding sand adheres between the sand stopper plates and gradually increases. Finally, there is a problem that the shoot tube is clogged. Therefore, in a factory that casts various products, the amount of water evaporation differs because the sand / metal ratio changes depending on the size and shape of the cast product.
It is difficult to cope with the fact that molding sand having a low moisture content and molding sand having a high moisture content are repeatedly sent, and in reality, no measures have been taken against wear of the chute cylinder. SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and can prevent abrasion of a chute cylinder and eliminate clogging of the chute cylinder due to adhered sand even when casting sand having a different moisture content is sent. It is an object of the present invention to provide a casting sand transfer chute device that can perform the casting.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, a casting sand transfer chute apparatus according to the present invention comprises a belt conveyor having a bottom portion formed on an inwardly inclined surface below a tip of the belt conveyor. In a casting sand transfer chute apparatus provided with a chute cylinder configured as a sand discharge port communicating with a post-processing facility on the other side of the bottom opposed to the inclined surface, a plurality of penetrating chute cylinders are provided at an upper position in the chute cylinder. The round bar shafts are arranged and fixed in a staggered manner, and the staggered round bar shafts are rotatably fitted with a pipe material in the chute cylinder inner portion, and furthermore, The pipe member is arranged so as to extend in parallel with the belt moving direction of the belt conveyor.

[0005]

Embodiments of the present invention will be described below in detail with reference to the drawings. A chute cylinder 2 communicates with one side of the post-processing equipment 1 of the recovered casting sand in FIG. 1A, and a hood 3 communicates with an upper portion of the chute cylinder 2. Is provided facing the front end. The shoot cylinder 2 has one bottom side (right side) formed on an inwardly inclined surface 5 and the inclined surface 5.
The other side opposite to the bottom is a sand discharge port 6, and this sand discharge port 6
Is communicated with the side surface of the post-processing facility 1. As shown in FIG. 2, a plurality of round bar shafts 7, 7 penetrating through the shoot tube 2 are arranged in a staggered manner at the upper position in the shoot tube 2, and both ends thereof are tightened and fixed with nuts 8, 8. doing. Pipe members 9, 9 are rotatably penetrated and fitted to the plurality of round bar shafts 7, 7 arranged in a staggered manner inside the chute cylinder 2. The round bar shafts 7, 7
And the pipe members 9, 9 are arranged so as to extend in parallel with the belt moving direction of the belt conveyor 4, and the molding sand S, which falls from the tip of the belt conveyor 4 with a certain width, collides with many pipe members 9, 9 at the same time. (See Fig. 1 (b))
Has become. Reference numeral 10 in the figure is an inspection door.

FIG. 1 (a) shows a structure thus constructed.
As shown in (b), the belt conveyor 4 operates and the foundry sand S is continuously dropped. At this time, the foundry sand S is dropped with a width in a direction intersecting with the extending direction of the pipe members 9, 9 and collides with many pipe members 9, 9 at the same time to be dispersed as shown by an arrow in FIG. Then, the falling speed is reduced, the collision with the lower pipe members 9 is repeated, and the collision energy is reduced so as to hit the inclined surface 5 at the bottom. Is discharged to the post-processing equipment 1. The above operation is performed irrespective of the moisture content of the foundry sand S. However, when the moisture content of the foundry sand S is large, the foundry sand S adheres to the pipe materials 9 and 9 but the foundry sand S By colliding with the pipe members 9, 9, the pipe members 9, 9 rotate around the round bar shafts 7, shake off the attached molding sand S, and the molding sand S does not increase in adhesion.

[0007]

As is apparent from the above description, according to the present invention, a plurality of round bar shafts penetrating the chute cylinder are arranged and fixed in a zigzag manner at the upper position in the chute cylinder. Since the pipe material is rotatably inserted into the chute cylinder portion so as to be rotatable through the arranged round bar shaft, even when casting sand having a different moisture content is sent, the chute cylinder is not moved. An excellent effect is obtained that wear can be prevented and clogging of the chute cylinder due to adhered sand can be eliminated.

[Brief description of the drawings]

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

FIG. 1 (b) is a view taken in the direction of arrows AA in FIG. 1 (a).

FIG. 2 is an enlarged view of a portion B in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Post-processing equipment 2 Chute cylinder 4 Belt conveyor 5 Inclined surface 6 Sand discharge port 7 Round bar shaft 9 Pipe material S Mold sand

Claims (2)

[Claims] 1. A sand discharge port (6) having a bottom portion formed on an inwardly inclined surface (5) and a bottom (2) opposite to the inclined surface (5) communicating with the post-processing equipment (1) below the tip of the belt conveyor (4). In the casting sand transfer chute apparatus provided with the chute cylinder 2 configured as described above, a plurality of round bar shafts 7 penetrating the chute cylinder 2 are provided at an upper position in the chute cylinder 2.
Are fixed in a staggered manner, and pipe members 9, 9 are rotatably fitted through the staggered round bar shafts 7, 7 in the inner portion of the chute cylinder 2. Casting sand transfer chute device to do. 2. A casting sand transfer chute apparatus according to claim 1, wherein said pipe members are arranged so as to extend in parallel with a belt moving direction of said belt conveyor.