JPH0210109Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a mold for manufacturing slag cut balls used in converters.

(Prior art) The flow of slag into the ladle during steel tapping in a converter has a negative effect on subsequent quality, so in order to prevent this, for example, Japanese Utility Model Publication No. 55-40185 discloses A spherical slag cut ball having a large number of protrusions on its surface is known.

(Problem that the invention attempts to solve) However, the conventional production of slag cut balls is
Usually, each piece was manufactured one by one, which caused problems in that it took time to manufacture and increased costs.

This invention not only allows molten steel to flow out sufficiently, but also
To provide a mold for manufacturing slag cut balls that enables mass production of slag cut balls with excellent slag cutting function.

(Means for Solving the Problem) A concave hemispherical shape having a vertical groove forming vertical groove in the hemispherical recess and a support portion for a horizontal groove forming ring formed by protruding the upper surface of the periphery of the recess. a lower mold frame in which a plurality of molds are supported on a plate-like frame;
An upper mold frame in which a plurality of convex hemispherical molds each having an opening at the upper part of a hemispherical convex part and a vertical groove forming vertical groove on the inner surface are supported on a plate-like frame; This is a mold for manufacturing a slug cut ball, which includes a two-part ring for forming horizontal grooves installed on the ring support section.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a partially sectional front view showing the entirety of the present invention. In FIG. 1, A is a lower mold frame, and B is an upper mold frame, and both mold frames A and B can be tightened and fixed with a rotation pin 1 and a nut 2. In this example, two spherical molds C (5 rows) are provided in the width direction so that ten slag cut balls can be manufactured at the same time, but the number of spherical molds C installed is not limited at all. As shown in FIGS. 1 and 2, the spherical mold C includes a hemispherical concave mold 3 provided in a lower mold frame A, and a hemispherical convex mold 4 provided in an upper mold frame B. At the top of the convex mold 4, raw material for slag cut balls (refractory) is placed.
A filling opening 5 is formed. The above concave mold 3
Inner and convex portions Inside the mold 4, vertical convex strips 6 and 7 are provided for forming vertical grooves for outflow of molten steel. 8
1 is a supporting portion of the two-part rings 9 and 10 for forming a horizontal groove for flowing molten steel in the slag cut ball, and is provided protruding around the concave mold 3. Incidentally, reference numeral 11 in the figure indicates a fitting portion provided around the convex mold 4.

The structure of the present invention is as described above, and the manufacturing process of the slag cut ball according to this embodiment will be explained with reference to FIG. 3.

First, the upper and lower mold frames A,
Fix B with rotating pin 1 and nut 2.
Now, as shown in FIG. 3a, about 1/3 of the castable 12 is filled from the top opening 5, and then the wire
After inserting the iron core 14 for specific gravity control, which is suspended from the cast iron, the castable is filled as shown in b. In this state, leave it for a predetermined time, and when the castable 12 is sufficiently solidified, remove the upper mold frame B as shown in c, and then d
Also remove the lower mold frame A as shown in the figure. In this state, the two-part rings 9, 10 are still fitted to the sides of the slag cut ball D, so pull the two-part rings 9, 10 to the side and remove them from the slag cut ball D.
Complete production. As shown in FIG. 3d, the slag cut ball D thus manufactured has an iron core 14 for specific gravity control inside, vertical and horizontal grooves 15 and 16 for flowing out molten steel, and furthermore, the handling of the slag cut ball D has an iron core 14 for controlling the specific gravity. It has a wire 13 for use.

The structure of the present invention and the manufacturing process of the slag cut ball are as described above.First of all, the slag cut ball is manufactured using the upper and lower mold frame method, which makes it possible to provide an arbitrary number of molds and mass production. This is the result. Second, by using a two-part ring, horizontal grooves can be formed in the slag cut ball in addition to vertical grooves, allowing molten steel to flow out more completely.
And the slag cut is made. Thirdly, the biggest feature of this invention is that the horizontal grooves are formed in two separate molds.
This is done using a split ring. That is, in this upper and lower mold frame system of the upper and lower separation type, if the horizontal protrusions 17 are provided inside the hemispherical unevenness as shown in FIG. 4 in the same way as the vertical protrusions, the separation direction of the mold Since the directions of installation are crossed,
When the upper and lower molds are separated, the protrusions 17 fit into the slag cut balls, making it impossible to separate the mold and the slag cut balls, making it impossible to adopt the upper and lower mold frame system of the present invention, which is suitable for mass production. be. In contrast, as in the present invention, a two-part ring for forming horizontal grooves is used, and after separating the upper and lower mold frames, the two-part ring is separated from the slag cut ball in the direction of forming the horizontal grooves, as shown in Fig. 3(d). By doing so, it became possible to form the horizontal grooves of the slag cut ball using the upper and lower mold frame method. Incidentally, the wire 12 may be omitted in the slag cut ball D.

(Effects of the invention) As described above, according to the invention, it is possible to mass-produce slag cut balls that can sufficiently drain molten steel and have vertical and horizontal grooves useful for slag cutting, and has greatly contributed to the production of slag cut balls. It is something.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the present invention, Figure 1 is a partially cross-sectional overall front view, Figure 2 is a detailed sectional view of the mold, and Figures 3 a, b, c, and d are slag FIG. 4, which is a manufacturing process diagram of the cut ball, is an explanatory view when a mold is provided with a protrusion for forming lateral grooves. A, B... Upper and lower mold frames, C... Mold, D... Lower slag cut ball, 3, 4... Concave and convex molds,
5...Filling opening, 6,7...Vertical protrusion for forming vertical grooves,
9, 10...For horizontal groove formation, 2-split ring, 14...
...Vertical groove, 15...Horizontal groove.

Claims (1)

[Scope of utility model registration request] A plurality of concave hemispherical molds each having a vertical protrusion for forming vertical grooves in a hemispherical concave portion and a support portion for a ring for forming a horizontal groove formed by protruding the upper surface of the periphery of the concave portion are mounted on a plate-like frame. The lower mold frame supported by
An upper mold frame in which a plurality of convex hemispherical molds each having an opening at the upper part of a hemispherical convex part and a vertical groove forming vertical groove on the inner surface are supported on a plate-like frame; A mold for manufacturing a slug cut ball, which comprises a two-part ring for forming a horizontal groove, which is installed in the ring support part.