JPH1094856A - Structure of mold variable in size of cast slab - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the arrangement of a driving device for divided molds by slidingly shifting the divided molds to mutually vertical direction along inclined flat cutting surface. SOLUTION: The mold 1 is combined with a right side divided mold 2 and a left side divided mold 2 divided with the inclined flat cutting surface 1 directed from the upper end part to the lower end part. In order to form to small inner hole width, e.g. the divided mold 3 is slidingly shifted downward to the other divided mold 2 along the cutting surface 1. By this slidingly shifting, the width of inner hole of the mold is changed from W1 to W2 and as a result, the width of a cast slab becomes small size. Further, the divided mold 2 and the divided mold 3 are brought into close contact with the cutting surfaces 1 and the cutting surface 1 at the time of casting is not brought into contact with molten metal. Therefore, on the cutting surface 1, the wearing and the deformation are not developed and thus, the divided mold 2 and the divided mold 3 are always sufficiently combined in the close contacting condition. By this constitution, the penetration of the molten metal, etc., in the combined part is not developed. Further, the sound cast slab can be obtd. because of no development of the penetration of the molten metal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to the structure of a mold used in continuous casting.

[0002]

2. Description of the Related Art Slabs obtained by continuous casting are used for the production of various types of steel materials having different cross-sectional dimensions. At this time, for example, if a slab with a large cross section is used for the production of a steel material with a large cross section, and a slab with a small cross section is used for the production of a steel material with a small cross section, the subsequent rolling process is greatly simplified. Preferred because it can be. For this purpose, it is conceivable to continuously prepare various types of molds having different sizes of the mold inner holes and to replace the molds each time with a mold suitable for the size of the steel material to be manufactured. However, this method of frequently changing the mold is not easy because changing the mold is a complicated operation.

[0003] Japanese Patent Application Laid-Open No. Sho 62-142054 discloses a variable size mold having a rectangular inner hole. That is, two long side plates forming a pair of long side portions and two short side plates forming a pair of short side portions are assembled and accommodated in a mold mounting frame in a square shape. A combination mold is described in which a long side plate and a short side plate are moved by using a base thickness direction driving device and two width direction driving devices to produce slabs having different sizes.

Japanese Utility Model Laid-Open No. 6-39246 discloses that two long-side plates forming a pair of long sides and a width direction sandwiched between the long-side plates are formed in a rectangular mold mounting frame. In a combination mold having two movable short side plates, by forming protruding portions on both side ends of each long side plate and both side ends of each short side plate, the slab size is variable. Also described is a combination mold that forms a recess in the corner of a slab. In this combined mold, four thickness direction driving devices and two width direction driving devices are described to move the long side plate and the short side plate.

[0005]

In any of the combination molds described in the above-mentioned publications, when changing the size of the slab, the long side plate and the short side plate are moved laterally. .
Therefore, a number of driving devices for moving the long side plate and the short side plate are disposed around the mold at the same height as the mold. However, it is extremely narrow because a large number of cooling water pipes and complicated mold vibrating devices are provided around the mold at the same height as the mold. Therefore, there is a problem that it is not easy to arrange a larger number of driving devices around the narrow mold and the operation of the driving devices is not easy.

In the combination mold described in the above publication, for example, when a wide cast piece is produced, the inner surface of the long side plate is worn or deformed by contact with a large amount of molten metal.
If the inner surface of the long side plate is worn or deformed, then when the narrow mold size is changed, the adhesion between both sides of the short side plate and the long side plate becomes insufficient, and There is a problem that a jug occurs at the corner.

The present invention solves these problems, that is, it is not necessary to dispose a large number of driving devices around the mold at the same height as the mold, so that it is installed even in a narrow place. In addition, there is no wear or deformation because the part where the mold members are combined does not come into contact with the molten metal. It is an issue.

[0008]

According to the present invention, there is provided (1) a combination of left and right divided molds which are divided into two by an inclined plane-shaped cut surface extending from an upper end to a lower end of the mold. A slab size variable mold structure characterized in that the size of the inner hole of the mold can be changed by sliding up and down with respect to the other divided mold along the surface.

[0009] (2) The mold is divided into two parts by an inclined flat left and right cut surface extending from the upper end to the lower end of the mold, and further divided into two parts by an inclined flat front and rear cut surface extending from the upper end to the lower end of the mold. A total of four split molds are combined, and a right split mold pair consisting of a right front split mold and a right rear split mold that are in close contact with each other, along the left and right cut surfaces,
Sliding up and down with respect to the left split mold pair consisting of the left front split mold and the left rear split mold that are in close contact with each other, in this state, the right split mold and the front split mold pair that are brought into close contact with the left front split mold, The size of the inner hole of the mold can be changed by sliding up and down along the front and rear cut surfaces with respect to the post-split mold pair, which is made by closely adhering the right rear split mold and the left rear split mold. It is a mold structure with a variable slab size.

FIG. 1 is an explanatory view of an example of a mold of the present invention.
-1), (A-2) , (A-3) is an explanatory view of the mold inner hole width to produce a cross-section larger cast piece W _1, (A
-1) is a plan view, (A-2) is a front view, and (A-3) is a right side view. The mold according to the present invention has an inclined flat cut surface 1 reaching the lower end from the upper end of the mold.
This is a mold obtained by combining the right divided mold 3 and the left divided mold 2 divided into two.

[0011] (B-1), (B-2), (B-
3) is an explanatory view in a case where the inner hole width W ₁ is reduced to W ₂ using the above-described mold, and is changed to a slab mold having a small cross section,
(B-1) is a plan view, (B-2) is a front view, and (B-3).
Is a right side view. When producing a slab having a small cross section, one divided mold, for example, 3 is slid downward along the cut surface 1 with respect to the other divided mold 2. Width of the inner hole of the mold by the sliding is next W ₂ from W _1, as a result, also reduced the width of the slab.

In the mold of FIG. 1, when changing the size of the slab, the split mold is moved in the vertical direction. Therefore, the driving device for the divided molds can be arranged in a non-narrow space above or below the mold without being arranged around the mold at the same height as the narrow mold. Therefore, the arrangement and operation of the driving device can be easily performed.

In the mold shown in FIG. 1, the split molds 2 and 3 are brought into close contact with each other at the cut surface 1, but the cut surface 1 does not come into contact with the molten metal during casting. Therefore, there is no wear or deformation on the cut surface 1, so that the split molds 2 and 3 are always closely adhered and combined. For this reason, there is no occurrence of hot water or the like in the combination portion.

FIG. 2 is an explanatory view of another example of the mold of the present invention.
2 (A) is explanatory diagram of the case inner hole of the mold is greater at h ₁ × W _1, FIG. 2 (B) W ₁ the longer side of the mold of the bore shown in FIG. 2 (A)
H ₁ an inner hole of the template in place of the W ₂ from × W ₂ (provided that W _1>
FIG. 2 (C) is an explanatory diagram in the case of W ₂ ), and the short side of the inner hole of the mold is changed from h ₁ to h ₂ to make the inner hole of the mold h ₂ × W ₂ (where h ₁ > h ₂ ). FIG.

In FIG. 2A, (A-1) is a plan view and (A-
2) is a front view, and (A-3) is a right side view. This mold is divided into two sides by an inclined plane left and right cut surface 1 reaching the lower end from the upper end of the mold, and further divided into two parts by an inclined plane front and rear cut surface 10 reaching the lower end from the upper end of the mold. And 4 divided molds 2-1, 2-2, 3
This is a template obtained by combining -1, 3-2.

In FIG. 2B, (B-1) is a plan view and (B-
2) is a front view, and (B-3) is a right side view. FIG.
A right front split mold pair consisting of a right front split mold 3-1 and a right rear split mold 3-2, which are closely adhered to each other in FIG. When sliding downward with respect to the left split mold pair consisting of the left rear split molds 2-2, in the same manner as described in FIG. 1, the long side length W ₁ of the inner hole of the mold of FIG. 2 (a) Figure and Long side length W ₂ of the inner hole of the mold of 2 (B)
Becomes

In FIG. 2C, (C-1) is a plan view and (C-
2) is a front view, and (C-3) is a right side view. FIG.
In the state of (B), the right front split mold 3-1 and the left front split mold 2
-1 are brought into close contact with the pre-divided mold pair,
2B, the right rear split mold 3-2 and the left rear split mold 2-2 are slid upward with respect to a pair of post-divided molds in which the mold is closed. side length h ₁ Fig 2 (C)
Consisting of a short side length h ₂ of the inner bore of the mold.

In the mold shown in FIG. 2, each divided mold is moved in the vertical direction. In addition, the left and right cut surfaces 1 and the front and rear cut surfaces 10, which are the combination portions of the split molds, do not come into contact with the molten metal. Accordingly, as described with reference to FIG. 1, the arrangement and operation of the driving device can be easily performed in the mold of FIG.

[0019]

According to the mold of the present invention, when changing the slab size, the divided mold is moved in the vertical direction. This facilitates the arrangement of the drive device for the split mold, and the drive device can be installed in a place that is not narrow, so that the operation is also facilitated. Further, in the mold of the present invention, since the combined portion of the split molds does not come into contact with the molten metal, the mold is less likely to be worn or deformed.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an example of a mold of the present invention.

FIG. 2 is an explanatory view of another example of the mold of the present invention.

[Explanation of symbols]

1: Inclined plane left and right cutting plane (inclined plane cutting plane),
2 (2-1, 2-2): split mold, 3 (3-1, 3)
-2): split mold, 10: inclined plane front and rear cut surface.

Claims (2)

[Claims] The present invention is characterized in that left and right split molds divided into two by an inclined plane cut surface reaching from an upper end to a lower end of a mold are combined, and one split mold is moved along the cut surface with respect to the other split mold. A mold structure with variable slab size, characterized in that the size of the inner hole of the mold can be changed by sliding up and down. 2. The mold is divided into right and left by an inclined flat left and right cut surface extending from the upper end to the lower end of the mold, and further divided into two by front and rear by an inclined flat front and rear cut surface from the upper end to the lower end of the mold. A pair of right split molds consisting of a right front split mold and a right rear split mold, which are made by combining four split molds, are brought into close contact with each other along the left and right cut surfaces. Slide up and down with respect to the left split mold pair consisting of the mold, in this state, the right split mold pair, the right split mold pair and the front split mold pair that is brought into close contact with the right front split mold, along the front and rear cutting plane, A mold structure having a variable slab size, characterized in that the size of the inner hole of the mold can be changed by sliding up and down with respect to a pair of divided molds formed by closely adhering the left divided mold.