JPH0614919Y2 - Sand mold weir cleaning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a sand-type weir cleaning device for casting.

(Prior Art) A lump of sand called lump sand or foreign matter such as dust is likely to adhere to the inner surface of a casting sand-type weir (gate).

If the molten metal is poured into the weir in this state, these foreign substances are caught in the molten metal and enter the casting, resulting in a defective casting.

Therefore, conventionally, these foreign substances have been manually cleaned and removed using a brush or the like.

(Problems to be solved by the invention) Therefore, there is a problem that not only a great amount of time and man-hours are required for cleaning these foreign matters, but also it is difficult to completely remove these foreign matters.

(Means for Solving Problems) The present invention has been proposed in order to address the above problems, and the gist thereof is to rotate up and down along the central axis and move vertically. A plurality of air nozzles for ejecting compressed air obliquely downward are provided on the moving rotating body, and a plurality of flexible strips having a predetermined length capable of floating on the rotating body by the compressed air ejected from the air nozzles. A sand-type weir cleaning device for casting is characterized in that one end of the body is locked.

(Operation) Since the present invention has the above-mentioned configuration, the rotating body is lowered along the central axis of the rotating body to be positioned in or near the weir bowl, and the rotating body is rotated about the central axis. When compressed air is jetted obliquely downward from each air nozzle, a plurality of strips receive centrifugal force and rotate while expanding outward, and at the same time they float by the compressed air blown from the air nozzle, While sliding on the inner surface, an impact force is applied to knock off foreign matter adhering to the inner surface of the weir. And. The knocked foreign matter is blown out of the weir by compressed air ejected obliquely downward from the air nozzle.

(Embodiment) An embodiment of the present invention is shown in FIGS. 1 and 2.
In FIG. 1, reference numeral 1 is a rotating body, which is rotated about its central axis and is vertically moved along the central axis by a driving means (not shown).

A plurality of air nozzles 5 for ejecting compressed air obliquely downward are provided on a side surface of the rotating body 1 at predetermined intervals, and a predetermined length is provided in the middle of the mounting position of the air nozzle 5 on the side surface. Multiple plastic chains 6
One end of is locked.

Then, the rotating body 1 is driven by a driving means (not shown).
Is lowered along the center line of the weir bowl 4 of the sand mold 3, and the lower end of the chain 6 is brought into contact with the bottom surface of the weir bowl 4 as shown in FIG. Next, when the rotating body 1 is rotated around its central axis and at the same time compressed air is ejected from the air nozzle 5 in an obliquely downward direction, the chain 6 receives centrifugal force and rotates while extending outward and ejected from the air nozzle 5. It is made to float by the air jet 7 which is made. Thus, chain 6
Gives an impact force while sliding on the inner surface of the weir bowl 4,
Foreign matter such as dust 9 and dust adhering to the inner surface of the container and the burr 10 adhering to the entrance edge of the weir 4 are knocked off. Then, the foreign matter 9 and the burr 10 that have been knocked off fall into the pouring hole 8, and most of the other is blown out by the compressed air ejected obliquely downward from the air nozzle 5 to the outside of the weir bowl 4. Is discharged. It is desirable that the rotating body 1 be rotated while being vertically moved within a predetermined range. Further, the foreign matters 9 and burrs 10 that have fallen into the pouring holes 8 are removed before the upper die 2a is assembled to the lower die 2b.

Although the chain 6 made of plastic is used in the above-mentioned embodiment, the material is not limited to plastic, but a material having a specific gravity and hardness equivalent to this can be used. A flexible strip can be used.

(Effects of the Invention) In the present invention, a plurality of air nozzles for ejecting compressed air obliquely downward are provided in a rotating body which moves up and down along the central axis while rotating around the central axis, and the rotating body is provided. Since one end of a plurality of flexible strips having a predetermined length that can be floated by the compressed air jetted from the air nozzle is locked, the rotating body is rotated around its central axis in or near the dam bowl. At the same time, when compressed air is jetted obliquely downward from the air nozzle, a plurality of strips receive centrifugal force and rotate while extending outwards, and at the same time they are floated by the compressed air jetted from the air nozzle, causing the inner surface of the weir to rise. While sliding, it gives an impact force to knock off the lumpy sand etc. adhering to the inner surface of the weir, and the crushed lumpy sand etc. is jetted diagonally downward from the air nozzle. Is discharged out of the weir. Therefore, it is possible to easily and quickly remove and completely remove the debris sand or the like adhering to the inner surface of the weir, and to save the labor of the worker. Further, since the strip is configured to float by the compressed air, the sand-type weir does not break even if it is shocked while sliding on the inner surface of the weir.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is a perspective view showing a casting sand mold having a weir. Rotating body …… 1, sand mold for casting …… 3, weir …… 4, air nozzle …… 5, strip …… 6

Claims (1)

[Scope of utility model registration request] 1. A plurality of air nozzles for ejecting compressed air obliquely downward are provided on a rotating body that moves up and down along the central axis while rotating about the central axis, and the compressed air is ejected from the air nozzles on the rotating body. A sand-type sand dam cleaning device for casting, characterized in that one end of a plurality of flexible strips having a predetermined length capable of floating by compressed air is locked.