JPS5933056B2 - Continuous casting mold equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the invention of a mold device for continuous casting, which allows the width dimension of a slab to be freely varied in a mold for continuously casting molten metal, and to have a uniform thickness. Another object of the present invention is to provide a continuous casting mold that can appropriately produce slabs with flat rolling surfaces.

Continuous casting has long been known as a technique for turning molten aluminum or other metals into slabs, and has been put into practical use by Bunsō Hikari.

However, due to the use of these continuously cast slabs, slabs with various widths are often required.
Conventionally, such variations in slab width have generally been handled by converting the mold itself.

However, according to this conventional general method, it is necessary to prepare a large number of molds according to the number of variations in slab width required, and the number of mold sets prepared is not only small but also It is not easy to change the mold, and the man-hours required to do so require interruptions during the casting process, which impairs the high efficiency of continuous casting technology, and makes it difficult to adjust and supply molten metal. This will inevitably result in complicated and loss-intensive work.

For this reason, tenter rolling is sometimes performed as an expedient, but since this rolling method is different from normal rolling, it reduces the operating rate of the hot rolling mill and reduces the productivity of the slab. This causes a drop in the temperature and reduces rolling efficiency, and it cannot be applied to large slabs, particularly long slabs, and in any case, the work is inefficient. I don't get it.

Under these circumstances, some continuous casting molds called adjustable molds have recently been proposed, in which the width of the slab can be varied. Therefore, when rolling such continuously cast slabs into products, it is necessary to change the settings in the facing process and to change or adjust the rolling equipment itself, which is unavoidable. I don't get it.

In carrying out such continuous casting, even if it is possible to obtain a slab with a flat rolling surface according to the set mold at the start of continuous casting, continuous casting is continued after starting in this way. In particular, the cooling and solidification at both ends of the mold, which is formed to form a rectangular slab cross section, progresses relatively rapidly, and the cooling and solidification at the middle portion is delayed, resulting in a slowdown in the cooling process throughout the mold. Solidification shrinkage occurs in the middle part, that is, even if both ends have the specified dimensions, the middle part of the slab does not have the specified thickness, and the width direction of the slab (rolling surface of the slab) This results in an uneven finish, and this fish also has disadvantages such as problems in rolling.

The present invention was developed through research to improve the disadvantages and shortcomings of the conventional molds as described above and to obtain an ideal mold for continuous casting. It consists of a pair of end mold members whose arrangement interval can be adjusted in a ready manner and a pair of side mold members arranged on both sides of these end mold members, and the side mold members can perform an appropriate bending action. It is formed of members, and furthermore, a bending operation mechanism for bending the side mold member is provided at the intermediate portion of these side mold members.

That is, to explain the specific embodiments of the present invention as shown in the attached drawings, the comparatively compact structure of the present invention is as shown in FIGS. 1 to 3. A pair of end face mold members 2, 2 are cast by support rods 9, 9 which are slidably provided on a frame 7 which also serves as a water jacket for water cooling, and the width dimension of the slab to be cast is changed. The end mold members 2, 20 have side mold members 1 on both sides.
, 1 are arranged and each of these mold members 1゜1.2.2E
In order to form a cavity for continuous casting, the above-mentioned side mold member 1゜1 is formed of a member capable of performing an appropriate bending action, and such side mold member 1
．． Preferably, a plurality of bending operation arms 3 are disposed in the intermediate portion of the side mold member 1.1. A curved state of the side mold member 1.1 as shown in FIG. 2 is formed by taking a step and pulling the both side mold members 1.1 from the parallel state as shown in FIG. The degree of curvature can be appropriately selected and varied, and can be set to each state, and the setting or change of the curvature state can be done by inserting the curvature operating arm 3 into the frame and using the curvature operating arm 3. It is clear that this can be done freely by rotating a nut that is engaged with a thread formed on the base end.

Each end mold member 2, 2 is a side mold member 1 as described above.
．． The first thing is that the end surfaces of the mold members 1, 1 are formed in an inclined shape so that the bending operation of 1 can be performed without any trouble.
As shown in the figure, both ends of the side mold member 1.1 have an elastic material 5 between them and both end portions 4a of a support member 40 provided inside the frame 7 which also serves as a water jacket. A support release portion 6 is provided in the intermediate portion of the support member 4 to allow the support relationship to be released as appropriate.

Furthermore, as shown in FIG. 3, a jacket 7 for water cooling is also provided for the side mold member 1. That is, the side mold member 1 is provided with a flexible jacket 7 with a spout hole at the bottom. A water jacket 10 is formed, and the jacket 7 and this water jacket 10 are connected through a flexible pipe line 8.

Even if the end mold member 2 is made of a rigid body, a water jacket is attached to it, and a flexible conduit 8 is not provided between it and the jacket 7 as shown in FIG. , as in the case of FIG.

FIGS. 4 to 6 show that the invention as described above is implemented in a larger scale, and the curvature adjustment operation for the side mold members 1, 1 as described above can be performed easily and appropriately. Aspects are shown.

The settings and operating relationships regarding the lid end mold member 2 are the same as those shown in FIGS. 1 to 3 above, and the side mold member 1 is also provided with a plurality of bending operation arms 3 in its intermediate portion. This is the same as in the case of FIGS. 1 to 3, but such an arm 3 is connected to the side mold member 1 by a pivot joint 13, and its tip is also connected to a bending operation rod by a pivot joint 14. In particular, in the bending operation rod 15 between the molds arranged in a row, bending operation arms 3, 3 are symmetrically installed oppositely on both sides, and the mounting angle of each of the bending operation arms 3 is as follows. They are symmetrically different, i.e. the centrally located bending actuating arm 3 is connected at a greater angle of inclination than the bending actuating arm 3 located at the end (in the illustrated case, the lateral mold part 1 is flat, the operating arm on the end side forms a right angle to the operating rod 15, and the operating arm on the center side forms an obtuse angle in the sliding direction of the operating rod 15).

Each of the operating rods 15 arranged in this manner is slid toward one end of the mold (the lower end in the case shown) as described above, and therefore a nut is attached to each of the operating rods 15. It slides by the rotation of the screw 18.

Since the screw 18 is perpendicular to the rotating shaft 17, it is rotated via the miter gear box 16.

The rotating shaft 17 is driven by a motor 20 via a speed reducer 19, and although not shown in the drawings, the rotating shaft 17 can be freely rotated as shown on the frame 7 by means of a suitable bearing. Each operating rod 15 is also slidably supported on a fixed member, such as a frame.

Since the interlocking mechanism using the miter gear box 16 as described above is basically related to changing the direction of the rotating shaft and interlocking it, it is obvious that bevel gears, worm wheels, etc. may be used as appropriate. be.

To start continuous casting, the lower mold is set at the bottom of the mold as described above, and the molten metal is injected into the mold above the upper mold, and the solidified metal is sequentially pulled downward together with the lower mold. However, in the present invention in which the set interval of the end mold members 2, 2 is adjusted as described above, it is necessary to appropriately adjust the length of this lower mold.

However, in order to adjust the length of the lower mold in this way, the lower mold is prepared by dividing it into a plurality of members (preferably about 3 members) at a dividing plane that intersects the length direction, and furthermore, the divided parts are Separately, even if this split lower mold member is assembled with the maximum gap, an intervening member with a width sufficient to cover the gap is attached, and these split lower mold members and attachment members are attached. The divided lower mold members are slidably connected on the surface of the intervening member by adjusting bolts, and the entire lower mold is assembled by rotating an adjusting means such as a nut screwed onto the end of the adjusting bolt. It is possible to respond appropriately to methods such as adjusting the length of the material.

According to the present invention as described above, it is possible to freely adjust and set the interval between the end mold members located between the side mold members in response to changes in the width dimension of the slab to be cast. It is possible to obtain slabs with varying width dimensions, and since the above-mentioned side mold members are made of a material that can perform an appropriate bending action, and a bending operation mechanism is provided on this side mold member, it is possible to obtain slabs with varying width dimensions. The side mold member can be curved by appropriately responding to the solidification shrinkage caused by the difference in solidification rate between both ends and the middle part, and thereby has a width that can quickly meet the respective demands.
Furthermore, it is possible to obtain a slab with flat side surfaces that are favorable for subsequent rolling, and this invention is highly effective in this type of continuous casting.

It should be noted that when using the configuration shown in FIGS. 4 to 6, which are embodiments of the present invention, it is certain that mass-production casting operations can be performed using a plurality of molds, and furthermore, regarding the bending operation for the side mold member as described above, the adjacent An appropriate bending state can be formed by adjusting the bending operation rod 1': J, which is common to molds to be molded, and simply changing the setting angle of the operation arm 3.
It is possible to greatly simplify the structural relationship between them and to facilitate their operation.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention, and FIG. 1 is a plan view at the start of an example of the mold apparatus according to the present invention, and also shows the adjustment operation relationship of the end mold member,
Fig. 2 is a plan view of the side mold member in a bending operation state, Fig. 3 is a sectional view thereof, Fig. 4 is a plan view of the present invention applied to a case in which a plurality of molds are arranged side by side, and Fig. 5 is a plan view of the side mold member in a bending operation state. FIG. 6 is a side view as seen in the direction of arrow V, and FIG. 6 is a side view as seen in the direction of arrow ■. In these drawings, 1 is a side mold member, 2 is an end mold member, 3 is an operating arm that is a bending operating mechanism, 4 is a support member, and 15 is a bending operating rod, which together with the operating arm 3 forms the bending operating mechanism. It is something.

Claims (1)

[Claims] 1 Consists of a pair of end mold members whose arrangement interval can be adjusted in response to changes in the width dimension of the slab to be cast, and a pair of side mold members arranged on both sides of these end mold members. . The continuous casting mold apparatus, wherein the side mold members are formed of a member capable of performing an appropriate bending action, and a bending operation mechanism for bending the side mold members is disposed at an intermediate portion of the side mold members.