JP2531259Y2 - Continuous casting mold with variable width and thickness - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous casting mold apparatus capable of changing the thickness and thickness of a slab in two levels, large and small.

[0002]

2. Description of the Related Art Conventionally, continuous casting molds in which only the width can be changed have been widely used. As shown in FIG. 4, this mold has a pair of narrow-sided mold plates 32 and wide-sided mold plates 33 inside driving means 34 and 35 inside a rectangular mold frame 31, and a narrow-sided mold plate 32. Are provided so as to be slidably opposed between the facing wide surface mold plates 33.

In order to change the width of the slab by using the mold, the wide surface mold plate 33 is slightly retracted by the driving device 35, and the narrow surface mold plate 33 is moved.
After the pressure on the side wall surface of the mold 32 is relaxed, the narrow mold plate 32 hitting the width direction in the cross section of the slab is moved to the drive unit 34.
Thus, when the width is reduced, the width is advanced, and when the width is increased, the width is retracted and moved to a position of a desired width, and thereafter, the wide surface mold plate 33 is again advanced by the driving device 35 to the side wall surface of the narrow surface mold plate 32. Pressing, or in a state where the wide surface mold plate 33 is clamped with a force equivalent to the static pressure of the molten steel in the mold (soft clamp), the narrow surface mold plate 32 is
To move to a position of a desired width.

In the continuous casting mold having a variable width, when continuously casting a slab having a constant cross-sectional thickness, the narrow surface mold plate 32 is moved forward or backward, and only the width dimension is increased. Can be used simply by adjusting the thickness of the slab.However, in the actual operation of continuous casting, in general, slabs with different cross-sectional thicknesses are mixed and produced, so Often replaced. In such a case, it takes a lot of time to change the mold,
There was a problem that productivity of the continuous casting facility was impaired.

On the other hand, in order to solve such a problem, a mold capable of changing the width and thickness, which can change not only the width but also the thickness, has been proposed in recent years. For example, JP-A-62-14
JP-A No. 2054 and JP-A-63-47051 disclose a mold in which a pair of wide-faced mold plates and narrow-sided mold plates are assembled in a square shape, and Japanese Utility Model Publication No. 60-89954 discloses a pair of molds. One side of the wide-sided mold plate is configured to be short and movable, and a plurality of narrow-sided mold plate members are provided on a side portion of the moving-side wide-sided mold plate so as to be able to advance and retreat, and a thickness changing spacer detachable behind the member. Have been proposed, respectively.

[0006]

The former one of the molds whose width and thickness can be changed has the advantage that the width and thickness can be continuously changed arbitrarily, but mechanically all four mold plates are used. This is a complicated structure that slides, which increases the cost of equipment. When changing the width (or thickness) during casting, it is necessary to simultaneously slide the wide-side mold plate and the narrow-side mold plate. There is a concern that a force may be generated to adversely affect the slab such as cracks.

The latter has the advantage that the thickness can be changed stepwise to an arbitrary thickness depending on the thickness of the spacer to be detached since the thickness is changed by attaching and detaching the thickness changing spacer. Each time, the narrow surface mold plate member must also be advanced and retracted according to the thickness at the same time, which may cause problems such as complicated operation.

The present invention has been made on the basis of the above-mentioned circumstances, and has a purpose to have a completely different structure from the above-mentioned mold capable of changing the width and thickness, and furthermore, to use a conventional width changing mold. An object of the present invention is to provide a mold that can be changed in thickness with a relatively simple structure without largely changing the structure and function of a possible mold.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, a continuous casting mold capable of changing the width and thickness according to the present invention is capable of changing the thickness of a slab in two levels, large and small. a type cast for Do continuous casting, through the drive means on the inside of the rectangular flask respectively are opposed to a pair of broad surface mold plate and a narrow face mold plates, and the broad surface mold plates facing the Semamen mold plate In addition to slidably provided, the left and right sides of each inner surface of the opposed wide-sided mold plate are provided with protrusions having a height of half the difference between the large and small thicknesses. And a positioning stopper corresponding to a small thickness that advances and retreats a distance of half the difference between the large and small thicknesses with respect to the large thickness positioning stopper . Height
Position of the mold frame corresponding to the large thickness on the subsequent mold vibration table
The fixed stopper and the casting behind the flask that hit the other back
Positioning of the mold frame corresponding to small thickness on the mold vibration table
A topper is provided between the positioning stoppers of these mold frames.
The flask is provided so that it can advance and retreat half the distance between the large and small thicknesses.
It is made of is.

[0010]

According to the present invention the width and thickness changeable continuous casting mold, since the portion leaving collision is provided on the right and left side portions of the inner surface of at least one of the opposing broad surface mold plate, narrow at the projecting portion By supporting the surface mold plate, it is possible to cast a slab having a thickness corresponding to the height of the protrusion and the width of the narrow surface mold plate, and a size of the width between the protrusions. By adopting a mold with a slab size that requires forced mold exchange as the mold having such a configuration, the number of mold exchanges can be reduced and the productivity of the continuous casting facility can be improved.

[0011] The thickness of the cross section of the slab in the actual operation of continuous casting is about 3 to 4 types, if any, and is generally concentrated to about 2 types in consideration of productivity such as mold replacement. As in the case of the continuous casting mold of the present invention in which the width and thickness can be changed, the thickness of the slab can be changed in two levels, large and small, so that the productivity of continuous casting can be sufficiently improved.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a continuous casting mold capable of changing the width and thickness according to the present invention, and FIG. 2 is a sectional view taken along line AA of FIG.

In the drawing, 1 is a rectangular mold frame, 2 is a narrow mold plate, 3 is a wide mold plate, 4 is a means for driving the narrow mold plate 2 forward and backward, 5 is a means for driving the wide mold plate 3 forward and backward, 6 Denotes a positioning stopper for the wide-sided mold plate 3, and advance / retreat drive means 4 and advance / retreat drive means 5 are provided on the mold frames 1 behind the narrow-side mold plate 2 and the wide-side mold plate 3, respectively. 2 and a wide mold plate 3.

The narrow mold plates 2, 2 are slidably opposed to each other between the wide mold plates 3, 3 at predetermined intervals.
The wide-surface mold plates 3 are provided with protrusions 8 having a height half the difference between the large and small thicknesses of the cast pieces cast on both left and right sides of the opposed inner surfaces 7.

The positioning stoppers 6 are provided on the left, right, up and down of the mold frame 1 behind the wide-surface mold plate 3, and as shown in detail in FIG. 2, bushes 10 are provided in holes 9 provided in the mold frame 1. A cylinder 13 having a flange 12 at the other end is slidably inserted into the bush 10 and has a distal end surface formed on a positioning stopper surface 11 corresponding to a large thickness. A rod body 17 having a head part 15 formed on a positioning stopper surface 14 corresponding to a small thickness is inserted, and a rotary actuator 18 fixed to a flange 12 of a cylinder 13 is connected to an inner thread part 16 of the rod body 17. It is configured.

Further, in this embodiment, the upper and lower positioning stoppers 6a and 6b are connected by a yoke 19 behind the mold frame 1, while a hole 20 is provided in the center of the upper and lower holes 9, 9 of the mold frame 1. A rotary actuator 22 having a screw shaft 21 connected thereto is fixed in the hole 20, and a tip of the screw shaft 21 is connected to a center portion of the yoke 19 by a pin 23. Thus, by driving the rotary actuator 22, the upper and lower positioning stoppers 6a and 6b can move forward and backward with respect to the mold frame 1. (A partial view above the center line in FIG. 2 shows a state of being retracted.)

Reference numeral 24 denotes a wide mold plate 3 provided behind the wide mold plate 3 facing the tip of the positioning stopper 6.
And a rod (not shown) thereof.
Of the positioning stopper 6 can be brought into contact with the end surface of the positioning stopper 6. This clamp cylinder 24 may be provided only behind the wide-side mold plate 3 on the opposite side to the reference side, and the reference side may substitute a dummy block.

The thickness change by the continuous casting mold having a variable width and thickness having the above configuration will be described with reference to a conceptual diagram shown in FIG. In addition, in FIG.
This is an example of changing mm. In the drawing, reference numerals 25, 26 and 27 denote drive cylinders provided on a mold vibration table (not shown) for providing the mold frame 1 for moving the mold frame 1 forward and backward. The positioning stopper of the mold frame 1 when it is adjusted to the side position, and the positioning stopper of the mold frame 1 when the reference side of the wide-surface mold plate 3 is adjusted to the thick reference position are shown.

The state shown in FIG.
, The positioning stopper surface 14 of the rod body 17 is fixed at a position protruding 25 mm, and the wide-surface mold plate 3 is brought into contact with this position to position the small-sized slab in the mold frame 1. Also, a state is shown in which the mold frame 1 is brought into contact with the positioning stopper 26 by the drive cylinder 25, and the inner surface of the wide-side mold plate 3 on the reference side is aligned with the mold reference line position.

In order to change the thickness by 50 mm from the above state, the rotary actuator 18 of the positioning stopper 6 is operated to move the positioning stopper surface 14 of the rod body 17 backward from the positioning stopper surface 11. Next, the space between the protruding portions 8 (projection of 25 mm) of the wide-side mold plate 3 which is opposed by the forward / backward driving means 5 is opened wider than the width of the narrow-side mold plate 2, and the narrow-side mold plate 2 is moved by the forward / backward drive means 4. 3 between the protrusions 8. At this time, the mold frame 1 is still in contact with the positioning stopper 26 by the drive cylinder 25.
(State shown in FIG. 3B)

Thereafter, as shown in FIG.
The narrow mold plate 2 is sandwiched between the projecting portions 8 by the reciprocating drive means 5, and the clamp cylinder 24 is operated to press the narrow mold plate 2 between the wide mold plates 3 to be clamped. Thus, the inner surface of the wide-side mold plate 3 on the reference side is located at a position retracted by 25 mm from the position of the mold reference line.

Next, the drive cylinder 25 is operated to press the mold frame 1 against a positioning stopper 27 provided at a position facing the positioning stopper 26. This moving distance is changed thickness 50
It is set to 25 mm, half of mm. This results in a thickness of 50
The continuous casting mold whose mm has been increased is set on the mold vibration table with the inner surface of the wide-side mold plate 3 on the reference side aligned with the position of the mold reference line. (State shown in FIG. 3d)

Thus, the continuous casting mold of the present invention whose width and thickness can be changed is used corresponding to the case where the thickness of the slab is changed.

On the other hand, in the continuous casting mold capable of changing the width and thickness according to the present invention, the cylinder 13 of the upper and lower positioning stoppers 6a and 6b connected via the yoke 19 is operated by projecting the rotary actuator 22. It can be retracted about 10mm. As a result, cleaning or the like can be performed with a gap of about 10 mm between the contact surfaces between the wide-side mold plate 3 and the narrow-side mold plate 2.

In this embodiment, since the screw mechanism (the screw portion 16 and the screw shaft 21) is used for the movement of the rod 17 of the positioning stopper 6 and the movement of the entire positioning stopper 6, the hydraulic pressure is reduced. reduction also be secured position by self-locking and further because it uses rotary actuators 18 and 22 as a driving source, the stroke of the mechanical stops of the sliding parts is ing well only one (the side opposite to the rotary actuator To stop at the end) . Ma
In this example, the projecting portion 8 of the wide-surface mold plate 3 is
Although provided on the template 3, the present invention can be applied to only one of them.
It is self-evident that the plan works.

[0026]

As described above, the continuous casting mold capable of changing the width and thickness according to the present invention can change the thickness with a relatively simple structure. Moreover, since the structure and function of the width change are the same as those of the conventional width change mold, the width and thickness change are easy to operate as a whole and practical.
In addition, thereby, cast pieces having different cross-sectional thicknesses can be cast with the same mold without exchanging the mold, and the number of mold exchanges is reduced, so that the productivity of the continuous casting facility can be improved. .

[Brief description of the drawings]

FIG. 1 is a front view of a continuous casting mold capable of changing a width and a thickness according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a conceptual diagram for explaining a thickness change in a continuous casting mold capable of changing a width and a thickness according to the present invention.

FIG. 4 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

1: Mold frame 2: Narrow surface mold plate
3: Wide-surface mold plate 4, 5: Forward / backward drive means 6, 6a, 6b: Positioning stopper 7: Inner surface of wide-surface mold plate 8: Projection
9, 20: Hole 10: Bush 11, 14: Positioning stopper surface 12: Flange 13: Cylinder 1
5: Head 16: Screw 17: Rod 18, 22: Rotary actuator 2
1: Screw shaft 23: Pin 24: Clamp cylinder 2
5: Driving cylinder 26: Stopper for positioning the flask when the thickness is small 27: Stopper for positioning the flask when the thickness is large

Claims (2)

(57) [Scope of request for utility model registration] 1. A thickness of the large and small type casting for width and thickness changeable continuous casting which may be changed in two levels of the slab, and a pair of broad surface mold plate via the drive means inside the rectangular flask The narrow-sided mold plates are opposed to each other, and the narrow-sided mold plates are slidably provided between the opposed wide-sided mold plates, and the left and right sides of each inner surface of the opposed wide-sided mold plates have a half of the difference between the large and small thicknesses. A positioning stopper corresponding to a large thickness is provided on the left and right and up and down of the mold frame on the back of the wide-surface mold plate while a protrusion having a height is provided. Provide a positioning stopper corresponding to the thickness, and further hit one back of the wide surface mold plate
Casting for large thickness on the mold vibration table behind the mold frame
Forming stopper on the formwork and the formwork on the other back
Of the mold frame corresponding to the small thickness on the mold vibration table behind
A positioning stopper is provided to
The mold frame between the toppers can advance and retreat by half the difference between the large and small thicknesses
A mold for continuous casting that can be changed in width and thickness, characterized in that it is provided in the mold. 2. A mold provided in a mold frame on the back of a wide-surface mold plate.
Positioning stopper of the mold plate, a cylinder having a flange at the other end is formed as a positioning stopper surface having one end surface corresponding to the large thickness, and is mounted within the cylinder, positioning stopper surface having one end surface corresponding to the small thickness When
Is to form a rod member the small thickness positioning stopper surface is capable protrude a distance half the difference magnitude thicker than the large thickness positioning stopper surface, is connected to the other end of the rod member, and the cylinder A drive device for driving the rod body supported by the flange to advance and retreat is provided, and the cylinders are inserted into holes formed on the upper and lower sides of the mold frame via bushes, respectively, while the upper and lower cylinders are connected by a yoke, 2. The continuous casting mold according to claim 1, wherein a central portion of the yoke is connected to driving means provided on the mold frame.