JPH077004Y2 - Flask - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a flask for a casting mold.

[Prior Art] A conventional mold may need a degassing function for releasing gas generated during casting to the outside or for depressurizing the inside of the mold as in the V process. .

As a method of degassing, there are a forced suction type, a natural leaving type and the like. In the former case, for example, a net 8 as shown in FIG.
A casting frame 10 having a cavity 9 and a suction port 7 is used. In the latter case, a plurality of gas vent holes are formed on the side surface as shown in FIG.
A casting frame or the like having 11 is used.

[Problems to be Solved by the Invention] The casting frame shown in FIG. 3 has a high degassing ability, but the net 8 is weak, and there is a high possibility that it will be damaged during molding or when the frame is removed. There is. The flask shown in Fig. 4 has a simple structure, is inexpensive, and has an upper part, but sand is used as a hole during molding.
Since it spills from 11, the opening area of the gas vent hole 11 cannot be made very large. Also, during casting, the gas flows out through the gas vent hole 11 provided on the side surface of the flask and is burned at the same time, so there is a drawback that the entire flask is contaminated with soot of combustion gas. This tendency is due to the use of organic binders. It is particularly remarkable in the case of foundry sand.

An object of the present invention is to provide a casting frame which can be used for both forced suction and spontaneous gas release by compensating for the above-mentioned drawbacks of the conventional casting frame.

[Means for Solving the Problems] A gas suction port is provided outside the four corners of the casting frame, a sealed space is provided by partitioning the insides of the four corners of the casting frame, and the gas suction port is connected to the gas suction port. The upper side of the partition is attached and connected to the partition of the closed space, and a part of the partition contacting the inner side of the rough plate is opened so as to have a gas venting function.

[Operation] According to the above, the casting sand thrown from the upper part of the flask into the flask does not fill the inside of the flask and forms a space inside the flask,
At this time, the upper surface of the foundry sand extending from the lower part of the hill to the inner wall of the casting frame serves as a gas vent opening.

The end of the lower space is connected from the enclosed space inside the four corners of the casting frame to the gas suction ports at the four corners of the casting frame, and the gas generated inside the casting frame is guided to the suction port, which is particularly effective as a forced suction type gas vent, Furthermore, since the gas suction port also discharges the gas, it is possible to spontaneously discharge the gas.

The side wall inside the casting frame has a simple structure with a simple ridge attached, and since no holes are made, sand does not spill out, and the combustion gas during casting is discharged from the suction port. Therefore, without soiling the casting frame, particularly simple degassing can easily remove the sand after casting when the foundry sand using the organic binder is applied.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

1 (a) is a perspective view showing an external configuration, FIG. 1 (b) is a plan view of FIG. 1 (a) with a partial cross section, and FIG. 1 (c) is a front view of FIG. 1 (a). FIG. 1B has a partial cross section taken along line NN of FIG. 1B, and FIG. 1D is a side view of FIG. 1A.
ZZ line partial cross section. FIG. 2 (A) is a partial cross-sectional view showing the state inside the casting frame along the line LL in FIG. 1 (b) when the molding sand is charged, and FIG. 2 (B) is FIG. 1 (b). FIG.

From FIGS. 1 and 2, a gas suction port 7 is provided outside the four corners of the casting frame 1, the inside of the four corners of the casting frame 1 is partitioned by a steel plate 6 to provide a closed space α, and the gas suction port 7 is connected. The upper part of the flat iron is welded to the inner wall surface of the casting frame 1 in a square shape and the black plate 3 is attached to connect it to the steel plate 6 of the partition part, and the steel plate 6 of the connection part inside the black plate 3 is used as the opening β. It is connected to the closed space α.

The gas inside the mold escapes to the outside via the gas vent surface γ under the rough plate 3, the gas passage δ inside the rough plate 3, the closed space α partitioned by the steel plate 6, and the suction port 7.

Here, the casting flask 1 can be used as a spontaneous discharge type by opening the suction port 7 or as a forced suction type by attaching a suction jig to the suction port 7.

When the molding sand 2 is put into the flask 1, a gas vent surface γ is formed in the lower part of the plate 3 and a gas passage δ is formed therein as shown in FIG. If a suction port 7 is provided as a gas vent hole on the wall surface of the flask 1, the gas Ω inside the flask 1 will pass through the gas vent surface γ, the gas passage δ, the closed space α gas vent hole, and through the suction port 7 to the outside. Is released to.

[Effects of the Invention] As described in detail above, according to the present invention, the structure is very simple, inexpensive, durable, has a large degassing ability, and can be used in either the spontaneous discharge method or the forced suction method. A flask can be provided.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention. FIG. 1 (a) is a perspective view showing an external configuration, and FIG. 1 (b) is a plan view of FIG. 1 (a). 1 (c) is a front view of FIG. 1 (a) and has a partial cross section taken along line NN of FIG. 1 (b), and FIG. 1 (d) is of FIG. 1 (a). FIG. 2 (A) is a side view showing a partial cross section taken along line ZZ in FIG. 2 (b), and FIG. 2 (A) is a state inside the flask along the line LL in FIG. FIG. 2 (B) is a partial plan view of FIG. 1 (b) at the time of charging the molding sand, and FIGS. 3 and 4 show a conventional casting frame. (A) is a perspective view of a forced suction type flask, FIG. 3 (B) is a sectional view of a broken line II portion in FIG. 3 (A), and FIG. 4 is a perspective view of a spontaneous ejection type flask. 1 ... Casting frame, 2 ... Cast sand, 3 ... Rough plate, 4 ... Gas vent surface, 5 ... Gas passage, 6 ... Steel plate, 7 ... Suction port,
8 ... Net, 9 ... Cavity, 10 ... Steel plate.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Sanshiro Hatakeyama 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima City, Hiroshima Prefecture Mitsubishi Heavy Industries, Ltd. Hiroshima Plant (72) Tetsuo Ogi 4 Kannon Shinmachi, Nishi-ku, Hiroshima City, Hiroshima Prefecture 6-22 No. 6 Hiroshima Works, Mitsubishi Heavy Industries, Ltd. (56) References Actual Public Showa 48-37612 (JP, Y1) Actual Public Showa 48-37611 (JP, Y1)

Claims (1)

[Scope of utility model registration request] 1. A gas suction port is provided outside the four corners of the casting frame, and a sealed space is provided by partitioning the inside of the four corners of the casting frame to connect with the gas suction port, and the upper side of the rough plate is attached to the inner wall surface of the casting frame. A casting frame, characterized in that it is attached and connected to a partition of a closed space, and a part of the partition which the inside of the rough plate contacts is opened.