JPH0638973B2 - Mold changer for continuous casting equipment - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a mold exchanging apparatus in a continuous casting facility.

(Prior Art) In a continuous casting apparatus, the shell thickness becomes non-uniform due to non-uniform drawing resistance and non-uniform cooling between the mold and the molten steel shell in the mold. As a result, molten steel may flow out immediately below the mold due to breakout, that is, shell breakage. This breakout causes the mold to melt. The melted mold is replaced with a new one and the operation is restarted.

By the way, in the multi-strand continuous casting apparatus as shown in FIG. 6, one tundish b for a plurality of molds is used.
Since molten steel is poured from the mold, when replacing a specific mold a, the work of casting into another mold is temporarily suspended, the tundish b is lifted upward by the jack d, and the immersion nozzle c is pulled out from the mold. However, there is a drawback that the casting of other strands must be interrupted.

(Problems to be Solved by the Invention) As described in the related art, in the continuous casting equipment, a plurality of (for example, 8 strands) molds are arranged for one tundish. When one of the strands damages the mold during an accident such as breakout during casting,
In the conventional technique, the mold cannot be replaced until the casting is completed, and the productivity is reduced by 10 to 20%. It is intended to improve these problems and to provide a device for replacing only the mold of the strand in which the other strand has an accident even if the casting operation of the other strand is continued, thereby contributing to the improvement of productivity.

(Means for Solving the Invention) A four-point link mechanism is constructed by pivotally attaching a mold table and a mold vibrating table separately provided at the bottom of the mold table via two mold take-out levers on both sides to form a four-point link mechanism. The mold take-out cylinder provided on the mold vibrating table enables the mold table to be rotated in a horizontal state, and the stopper provided on the mold vibrating table allows the mold take-out lever to abut to position the pouring position. age,
It also has a horizontal mold-moving beam or a mold-changing frame supported by a pantograph-type link device, and a vertically-movable lifting frame that can move in a direction intersecting the slab unloading direction. It is mounted so that it can turn on the dolly, and any mold can be replaced independently while the other molds are in operation.

First Embodiment of the Invention A first embodiment will be described with reference to FIGS. 1 to 3. The mold 1 is mounted on a mold table 2 having an inverted L shape with a fixing device (not shown) via a collar 1 '. When viewed from the side, the mold table 2 has an inverted L as shown in FIG.
It has a mold shape, and its planar shape is an inverted U shape as shown in FIG. The mold table 2 is linked to the mold vibrating table 5 on both sides via mold take-out levers 3a and 3b. When viewed from the side, the mold vibration table 5 also has an L shape as shown in FIG. 1, and has a U shape in plan view. Mold ejection lever 3a
Are pivotally attached to the upper side surface 2a of the mold table 2 and the protrusions 5c provided on the vertical surface 5a of the mold vibration table 5, respectively. The take-out lever 3b is pivotally attached to the lower side surface 2b of the mold table 2 and the lower side surface 5b of the vibration table 5, respectively. Reference numeral 4 is a stopper fixed to the vertical surface 5a of the mold vibration table 5 for restricting the pouring position, and 6 is a mold ejection cylinder mounted between the vertical surface 5a of the mold vibration table and the ejection lever 3b. Reference numeral 7 is an upper vibration lever pivotally attached to an upper part of the vertical surface 5a of the mold vibrating table 5 and an upper part of the mold vibrating device supporting device 19, and 8 is pivotally supported at a lower part of the supporting device 19 so that its central portion can be rocked. One end is pivotally attached to the lower part of the vertical surface 5a of the mold vibration table 5 by a drive vibration lever. The other end of the drive vibration lever 8 is connected to a vibration source (not shown).

Reference numeral 9 denotes a chamber door for accommodating the continuous casting equipment, which is constructed so that it can be removed. When the mold 1 is replaced, the mold 1 must be removed before the operation.

Reference numeral 16 denotes a mold replacement beam, which is guided by a replacement beam guide roller 20 attached to the elevating frame 15, and is configured to be movable with respect to the elevating frame 15 by a mold replacement beam driving cylinder 18. . Lifting frame 15
Is mounted on the column 14 and can be moved up and down by the lifting frame lifting cylinder 17.

12 is a mold replacement cart. A slewing wheel 13 is attached between the column 14 and the mold changing carriage 12, and the column 14 and the lifting frame 1 are attached to the mold changing carriage 12.
You can turn 5 times. A traveling wheel 11 is attached to the mold replacement cart 12 so that it can be moved along a rail 10 fixed to an upper beam in a direction intersecting with the slab unloading direction X. Reference numeral 21 is a mold movable cover, and 22 is a mold fixed cover. The other molds arranged in rows are individually supported by the same supporting structure.

(Operation of First Embodiment) In order to replace the mold 1, first, the chamber door 9 and the mold movable cover 21 are removed. Next, when the mold take-out cylinder 6 is operated, the mold table 2 on which the mold 1 is placed is kept horizontal by the link mechanism composed of the left and right mold take-out levers 3a and 3b and moved to the position of the imaginary line. The new mold 1 is placed on the end of the mold replacement beam 16 and moved to set the mold replacement position. Lifting Cylinder 17 for Lifting Frame
Is operated to lower the elevating frame 15 to the lower limit.
The mold replacement beam 1 is operated by operating the mold replacement beam driving cylinder 18.
6 is moved, and the other end side where the mold is not placed is inserted under the mold 1.

The mold fixing device (not shown) is loosened to release the mold, and then the lift frame lifting cylinder 17 is operated to move the mold replacement beam 16 to the upper limit to scoop the mold 1. As it is, the mold replacement beam drive cylinder 18 is operated in the opposite direction to pull out the mold 1, and then the lifting frame 15 is rotated to the swivel wheel 13.
And rotate the mold change beam drive cylinder 18 to bring the new mold closer to the lift frame 15. Further, the entire mold is swung to set the new mold at the insertion position, and the mold replacement beam drive cylinder 18 is operated to move the new mold onto the mold table 2. The mold changing beam 16 is lowered by the lifting frame lifting cylinder 17 and the mold is placed on the mold table 2. Then, the mold replacement beam drive cylinder 18 is operated to operate the mold replacement beam 16
Retreat. The mold is fixed to the mold table 2 by a mold fixing device (not shown). The mold take-out cylinder 6 is reversely operated to return the mold to the casting position. The chamber door 9 is attached to complete the mold replacement work.

(Second Embodiment) FIG. 4 shows a modification of the mold loading / unloading device. Reference numeral 23 denotes a mold replacement frame, which is viewed from the side and has an inverted L shape as shown in FIG. 4 and an inverted U shape in plan view as shown in FIG. The mold changing frame 23 is supported by pantograph type link devices 25 attached to the front and rear of the elevating frame 24, so that the mold changing frame 23 can move (expand and contract) with respect to the elevating frame 24 by the mold changing frame drive cylinders 26a and 26b. Is configured. The elevating frame 24 is fitted in a column 27 and can be moved up and down by an elevating cylinder 28 for the elevating frame 2. A swivel wheel 30 is attached between the column 27 and the mold changing carriage 29 so that the column 27 and the elevating frame 24 can rotate with respect to the mold changing carriage 29. A traveling wheel 31 is attached to the mold replacement carriage 29 so that it can be moved along the rail 32 in a direction intersecting the slab unloading direction X (FIG. 5).

The structure of other parts is completely the same as that shown in FIGS.

(Operation of Second Embodiment) When replacing the mold 1, first, the door 9 and the mold movable cover 21 are removed. Next, the mold removal cylinder 6
Is operated to move the mold 1 and the mold table 2 to the position of the chain double-dashed line via the link mechanism. A new mold 1A is placed on one of the pair of mold replacement frames 23, 23 supported by the mold replacement carriage 29, moved on the rail 32, and set at the mold replacement position. The lifting frame lifting cylinder 28 is operated to lower the lifting frame 24 to the lower limit. The mold changing frame driving cylinder 26a is operated to move the mold changing frame 23, and the other end side where no mold is placed is inserted under the mold 1.

The mold fixing device (not shown) is operated to release the mold, and then the elevating frame lifting cylinder 28 is operated to move the mold replacement frame 23 to the upper limit, and the mold 1 is scooped. As it is, the mold replacement frame drive cylinder 26a is operated in the opposite direction to pull out the mold 1, and then the lifting frame 24 is rotated to the swivel wheel 30.
The mold changing frame driving cylinder 26b is rotated about 90 ° (for example, about 90 °) to move the new mold 1A close to the elevating frame 24. Further, the whole mold is swung to set the new mold 1A at the insertion position, and the mold replacement frame drive cylinder 26b
Is operated to move the new mold 1A onto the mold table 2. The mold changing frame 23 is lowered by the lifting frame lifting cylinder 28 and the mold 1A is placed on the mold table 2. Then, the mold replacement frame drive cylinder 26b is operated to retract the mold replacement frame 23. The mold is fixed to the mold table 2 by a mold fixing device (not shown). The mold take-out cylinder 6 is reversely operated to return the mold to the casting position.
The door 9 is attached to complete the mold replacement work.

(Effect of the Invention) According to the conventional mold replacement method, the mold movable cover 21 and the mold fixed cover 22 are removed after the tundish is removed, and the mold is hung upward by using the crane and the hanger. On the other hand, according to the present invention, the mold table and the mold vibrating table separately provided under the mold table are provided on both sides.
A four-point link mechanism is pivotally attached via a mold take-out lever addressed to a book, and the four-point link mechanism is provided on a mold vibrating table so that the mold take-out cylinder can rotate the mold table in a horizontal state. Moreover, since the mold take-out lever is brought into contact with the stopper provided on the mold vibrating table to enable the pouring position to be positioned, the take-out is not performed upward by the combined use of the horizontally movable mold carry-in / carry-out device. So while other castings continue the casting operation,
Single replacement of any template can be performed. Therefore, even during the casting operation, the casting mold in which the casting has been interrupted can be restored, and the operating rate of the continuous casting facility can be further improved.

[Brief description of drawings]

FIG. 1 is a front view of the first embodiment of the present invention. 2 is a plan view of the same. FIG. 3 is a sectional view taken along the line III-III in FIG. FIG. 4 is a front view of the second embodiment of the present invention. FIG. 5 is a plan view of the same. FIG. 6 is a sectional view of the vicinity of the mold and tundish of the multi-strand continuous casting equipment. In the figure: 1 ... Mold, 2 ... Mold table 3 ... Mold ejection lever, 4 ... Stopper 5 ... Mold vibration table 6 ... Mold ejection cylinder 7 ... Vibration lever (upper), 8 ... Driving vibration Lever 9 …… door, 10 …… rail 11 …… traveling wheel, 12 …… mold changing truck 13 …… swivel wheel, 14 …… column 15 …… lifting frame, 16 …… mold changing beam 17 …… lifting Cylinder for lifting frame 18 …… Cylinder for driving mold replacement beam 19 …… Fixed bearing for mold vibration device 20 …… Guide roller for replacement beam 21 …… Movable cover for mold, 22 …… Fixed cover for mold 23 …… Mold removal for mold Replacement frame, 24 …… Lifting frame 25 …… Link device 26 …… Mold replacement frame drive cylinder 27 …… Column 28 …… Lifting frame lifting cylinder 29 …… Mold replacement trolley, 30 …… Swivel wheel 31 …… Running wheels, 32 ... rails

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kiyoshi Tsune 5-15 Kitahama, Higashi-ku, Osaka City, Osaka Prefecture Sumitomo Heavy Industries, Ltd. Osaka Branch Office (72) Inventor Yoshito Watanabe 5-2 Sokai-cho, Niihama-shi, Ehime Prefecture Sumitomo Heavy Industries, Ltd. Niihama Works

Claims (1)

[Claims] 1. A four-point link mechanism is constructed by pivotally attaching a mold table and a mold vibrating table separately provided under the mold table via two mold take-out levers on both sides to form a four-point link mechanism. The mold take-out lever provided on the mold vibrating table allows the mold table to rotate while maintaining the horizontal state, and the stopper provided on the mold vibrating table allows the mold take-out lever to abut to position the casting position. A mold changing device for continuous casting equipment, characterized in that