JPH0741548Y2 - Foundry sand feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a foundry sand supply device for supplying foundry sand to a mold.

[Conventional technology]

The sand mold used at the time of casting is molded by supplying and filling molding sand into a mold frame in which a core such as a disappearing mold is arranged.

Generally, as a device for supplying molding sand to this mold frame,
Many hoppers 1 as shown in FIG. 3 are adopted.

In the supply device shown in the same figure, a flexible hose 2 is connected to the discharge port 1a of the hopper 1, and when the valve means (not shown) is appropriately opened and closed, the foundry sand 3 stored in the hopper 1 is flexible hose. It will be dropped and supplied to the mold frame 4 via 2.

[Problems to be solved by the device]

By the way, in the above-mentioned supplying device, when the molding sand 3 is supplied while the flexible hose 2 is left in the free state, as shown by the two-dot chain line in the figure, the lower end opening 2a of the flexible hose 2 in the mold frame 4 will be described. The foundry sand 3 is intensively supplied only to the portion facing.

Therefore, in the supply device, it is necessary to supply the molding sand 3 to the mold frame 4 while moving the flexible hose 2 with respect to the mold frame 4.

Recently, automation of this kind of simple work is progressing,
As described above, in the supply device that has to supply the molding sand 3 while moving the flexible hose 2, an actuator for moving the flexible hose 2 at the time of automation and a complicated control for operating the actuator. Circuitry is required, resulting in a significant increase in cost of the feeder.

In view of the above situation, an object of the present invention is to provide a foundry sand supply device that can inexpensively automate the supply operation.

[Means for Solving the Problems]

The foundry sand supply device according to the present invention comprises a swash plate arranged in the upper region of the mold frame and having a plurality of notches, and means for supplying the foundry sand to the upper surface of the swash plate. The casting mold is filled with molding sand through the notch.

[Action]

According to the above configuration, the foundry sand supplied to the upper surface of the swash plate,
It is dispersed by flowing on the swash plate, and is dropped and supplied to the mold frame by the notch formed in the swash plate.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating an embodiment.

FIG. 1 conceptually shows a foundry sand feeder according to the present invention, and the feeder has a hopper 10 at the top. The hopper 10 has a supply port 10a on its upper surface and a discharge port 11b on the center of its bottom surface, and the discharge port 11a of the bucket elevator 11 is arranged above the supply port 10a, while The rotary feeder 12 is installed at the discharge port 10b.
Are connected.

Further, in this supply device, the distribution means 20 is arranged at a portion located below the rotary feeder 12. As shown in FIG. 2, the distribution means 20 has a first side disposed inside a rectangular frame 21 whose short side a has the same length as the outlet 12a (shown in FIG. 1) of the rotary feeder 12. Swash plate 22 of
The second swash plate 24 is disposed inside a square frame 23 having one side b having the same length as the long side c of the rectangular frame 21, and the lower end opening 23a of the square frame 23 is closed. And a wire mesh (not shown).

As is clear from the figure, the first and second swash plates 22 and 24 form a mountain shape that inclines downward from the central portion toward both side edges, and each inclined surface 22a, 22a, 24a, 24a
A plurality of cut grooves (notches) 25, 25 ... Are formed in the.
The cut grooves 25 are arranged at equal intervals along the inclination direction of the inclined surfaces 22a, 24a, and each has a substantially triangular shape in which the opening area increases as it goes downward. In addition,
Although not shown in the figure, the first and second swash plates 2 described above
The inclination angles of the inclined surfaces 22a, 22a, 24a, 24a at 2 and 24 are set to about 30 ° with respect to the horizontal plane, respectively.

As shown in FIG. 1, the distribution means 20 includes a rectangular frame 21
The ridge 22b of the first swash plate 22 at the center in the direction of the long side c in FIG.
The swash plate 22 is housed in the rectangular frame 21 so that the
The rectangular frame 21 is configured to be fixed to the central portion of the upper surface of the square frame 23 so that the ridge 24b of the swash plate 24 is occupied, and further, the first frame is provided below the discharge port 12a of the rotary feeder 12. The ridges 22b of the swash plate 22 are arranged so as to be occupied.

In the supply device configured as described above, the casting sand in the hopper 10 is first replenished by the bucket elevator 11, and the mold 40 is conveyed and set below the distributor 20 by the roller conveyor 30. At this time, the opening 40a on the upper surface of the mold frame 40 is completely covered by the square frame 23 of the distributor 20. Further, although not explicitly shown in the drawing, a disappearing mold having a required shape is arranged inside the mold frame 40.

From this state, when the rotary feeder 12 is rotationally driven by a required angle by a driving means (not shown), the castings stored in the hopper 10 by an impeller (not shown) housed inside the rotary feeder 12 A certain amount of sand (not shown) is dropped and supplied onto the ridge 22b of the first swash plate 22 of the distribution means 20.

The foundry sand supplied to the first swash plate 22 is sequentially flowed along the inclined surfaces 22a, 22a by the action of gravity and dispersed in the left-right direction in FIG. 1, that is, the long side c direction of the rectangular frame 21. Together with the plurality of kerfs 25, 25 formed in the inclined surfaces 22a, 22a.
Is uniformly dropped and supplied onto the ridge portion 24b of the second swash plate 24 via.

The foundry sand supplied to the second swash plate 24 is further flown along the inclined surfaces 24a, 24a by the action of gravity, dispersed in the vertical direction in FIG. 1 and formed on the inclined surfaces 24a, 24a. Further, it is uniformly dropped and supplied onto the entire surface of a wire mesh (not shown) arranged in the lower surface opening 23a of the square frame 23 through the plurality of cut grooves 25, 25.

The foundry sand supplied onto the wire mesh is further dispersed by passing through the mesh, and is evenly supplied and filled into the mold frame 40 set below the distributing means 20.

The mold frame 40 filled with foundry sand is the roller conveyor 30.
It is transported to the pouring process not shown by
A new mold frame is conveyed and set below the distributing means 20,
The molding sand is supplied again by the above-described operation.

In such a feeder, the foundry sand in the hopper 10 is swash plate 2
By passing through 2 and 24, they are dispersed and supplied to and filled in the mold frame 40, so that automation can be achieved without using a special actuator or the like.

In the above embodiment, the foundry sand in the hopper 10 is supplied to the mold frame 40 via the two types of swash plates 22 and 24 and the wire net, but the present invention is not limited to this and the swash plate is not limited thereto. May be a single type or three or more types, and a wire mesh is not always necessary.

Further, in the above-mentioned embodiment, the mountain-shaped swash plate thicknesses 22 and 24, which are inclined downwardly from the central portion toward both side edges, are exemplified, but in the present invention, even if they are simply inclined toward one side, Alternatively, it may be inclined from the center toward the entire circumference. Furthermore, although the inclination angle of the swash plate is set to 30 °, other values may be used.

Further, since the notch has the substantially triangular cut grooves 25 which are arranged at equal intervals along the inclination direction and whose opening area increases as it goes downward, the mold frame
It is possible to uniformly supply the molding sand to the 40, but the present invention is not limited thereto. However, when the groove-shaped notch is adopted as in the embodiment, it is preferable to arrange the notch along the inclination direction of the swash plate.

[Advantages of the Invention] As described above, according to the foundry sand supply device of the present invention, the foundry sand supplied to the upper surface of the swash plate is dispersed by flowing on the swash plate. Since it is dropped and supplied to the mold frame by the notch formed in the swash plate, the supply work can be automated at low cost without using an actuator or the like.

[Brief description of drawings]

FIG. 1 is a side view conceptually showing a foundry sand feeder according to the present invention, and FIG. 2 is an enlarged exploded perspective view conceptually showing a swash plate applied to the foundry sand feeder according to the present invention. FIG. 3 is a side view conceptually showing a conventional foundry sand feeder. 10 ... Hopper, 12 ... Rotary feeder, 22,24 ... Swash plate, 25 ... Notch, 40 ... Mold frame.

Claims (1)

[Scope of utility model registration request] 1. A swash plate which is arranged in an upper region of a mold frame and has a plurality of notches, and means for supplying molding sand to the upper surface of the swash plate, through the notches of the swash plate. A molding sand supply device, wherein the molding frame is filled with molding sand.