JPH0335844A - Molding flask - Google Patents

Abstract

PURPOSE:To lighten a molding flask in weight by providing the molding flask main body having height lower than that of molding sand and a projecting part projecting from the molding flask main body and detaining the molding sand with this projecting part. CONSTITUTION:At the time of making the mold, after laying the molding flask 1 and a raising flask 6 on a pattern base plate 9, the molding sand is charged into both flasks 1, 6. Successively, the molding sand is pressed with a pressing plate 7 having projecting stripes 8 to pack this into high density condition. By removing the raising flask 6 and the pattern base plate 9, the desired mold is obtd. and the molding sand projecting from upper face 3 of the main body is detained with the projecting part 4 to prevent mold crack. By this method, the molding flask can be lightened in weight and gas vent at the time of casting is quickly executed and mold deformation with the lapse of time is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to improvement of a casting flask, and in detail:
This relates to the improvement of the casting flask that engages with the joint frame, and is used to reduce the weight of the mold.

(Prior Art and Problems to Be Solved) Conventional casting flasks and joint flasks are formed from rectangular metal frames, and both frames are placed on a model surface plate during mold making (for example, Since the conventional casting flask is formed from a rectangular mold, the weight of the mold is large.
A large amount of energy is required during molding and transportation.

Therefore, the present invention has been made to solve this problem, and its purpose is to reduce the weight of a casting flask.

(Means for Solving the Problems) The flask of the present invention is a flask that engages with a joint frame, and includes a flask body that is lower than the height of the molding sand and a convex portion that protrudes from the flask body. However, the convex portion retains the molding sand.

(Function) Since the present invention is configured as described above, the height of the T4 frame body is reduced to reduce the weight, and the molding sand protruding from the upper surface of the flask body is retained by the convex portion.

(Example) Figs. 1 and 2 show a flask according to the present invention, and the flask 1 includes a rectangular flask body 2 and an abbreviated convex portion erected at the four corners of the upper surface 3 of the body. 4, the flask main body 2 is formed lower than the height of the molding sand 5, and the convex portion 4 locks the molding sand 5 protruding from the upper surface 3 of the main body. The respective heights of the flask body 2 and the convex portion 4 are! The weight of the mold is determined as appropriate in consideration of the weight of the o-type, the strength of the mold, gas venting during casting, etc., and the combination of the flask body 2 and the convex portion 4 aims to reduce the weight of the mold. The flask 1 engages with the joint frame 6 in a concave-convex manner.

7 is a suppression plate having a rectangular protrusion 8, and 9 is a model surface plate.

Since this embodiment has the above-mentioned configuration, after placing the flask 1 and joint frame 6 on the model surface plate 9 during mold making,
The molding sand 5 is put into both frames 1 and 6, and then the molding sand 5 is pressed by a pressing plate 7 having protrusions 8 to fill the molding sand 5 in a high-density state. Thereafter, by removing the joint frame 6 and the model surface plate 9, a mold as shown in FIG.
The molding sand 5 protruding from the molding sand 5 is retained to prevent mold cracking.

Another embodiment is shown in FIGS. 4 and 5, except that a rectangular truncated pyramid-shaped convex portion 14 is provided upright on each side of the upper surface 13 of the main body 13 of the rectangular casting flask 11. It is formed in the same manner as in the embodiment, and one casting flask is a zero casting flask 11 that engages with a joint frame 16 in a concave and convex manner.
When the mold is made in the same manner as in the above example, the sixth
A mold as shown in the figure is obtained, and the convex portion 14 locks the molding sand 15 protruding from the upper surface 13 of the main body to prevent the mold from cracking.

(Effects of the Invention) According to the present invention, there is provided a flask that engages with a splicing frame, and includes a flask body that is lower than the height of the molding sand and a convex portion that protrudes from the flask body, and the convex portion locks the molding sand, making it possible to reduce the weight of the casting flask, allowing quick degassing during casting, preventing mold deformation during the transportation process or the passage of time, and preventing firmness due to casting pressure. The occurrence of non-defective products is significantly reduced.

[Brief explanation of drawings]

FIG. 1 is a front view of a flask according to the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a front view of a cast mold, and FIG. 4 is a front view of a flask showing another embodiment. FIG. 5 is a plan view of the same, and FIG. 6 is a front view of a mold made according to another embodiment. l, 11... flask, 2.12... flask body. 4.14... Convex portion, 5.15... Foundry sand, 6.16
...joint frame. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] A flask that engages with a joint frame, comprising a flask body that is lower than the height of the molding sand and a convex portion protruding from the flask body, and the convex portion locks the molding sand. Casting flask.