KR100571990B1 - Metal strip casting apparatus and method - Google Patents

Abstract

Apparatus for continuously casting metal strip comprises a pair of parallel casting rolls (16). In use of the apparatus molten metal is delivered between the casting rolls which are rotated to deliver cast strip product downwardly from the rolls. Casting rolls (16) are mounted on a roll module (13) installed in and removable from the caster as a unit. Module (13) is movable horizontally from a stand-by position to an intermediate position beneath a casting position of the rolls and can be hoisted from the intermediate position by operation of hoists (71) to lift the rolls (16) into their casting position. <IMAGE>

Description

Metal Strip Casting Machine and Method

FIELD OF THE INVENTION The present invention relates to the casting of metal strips, and in particular, to the casting of metal strips in accordance with continuous casting in twin roll casting machines.

In a twin roll casting machine, the molten metal is introduced between a pair of mutually rotating horizontal casting rolls, which are cooled to solidify on a roll surface on which the metal shell is moving and attracted from the nip between the rolls. To produce a solidified strip product which is sent downward from the nip of Here, the term "nip" is used to refer to the general area in which the rolls are located closest to each other. The molten metal is poured from a ladle into a small vessel or a series of small vessels, from which it flows through a metal delivery nozzle located above the nip and into the nip between the rolls. A casting pool of molten metal is formed on the casting surfaces of the rolls adjacent to the top of the nip and extending along the longitudinal direction of the nip. This casting pool is confined between the ends of the rolls and slidably supported side plates or dams to prevent the overflow of both ends of the casting pool, although alternative means such as electromagnetic barriers have been proposed.

Change-over of casting rolls is a serious problem in twin roll casting machines. The rolls need to be exchanged during casting so that strips of different widths are produced and the rolls must be replaced if the casting surface is damaged or worsened during casting for any reason. If the rolls are to be replaced on site, a significant amount of potential casting time is spent waiting to cool the casting components and the area surrounding them. Once placed on site, the new roll set is calibrated prior to casting, and the width of the nip is preset.

In the casting of ferrous metals, it is necessary to preheat the metal components refractory components and casting pool confining means to very high temperatures prior to the start of casting. For this reason, there is provided a twin roll casting device having a disassembleable component that allows the roll and the preheated refractory component to be rapidly drawn into the working assembly so that casting can commence before the preheated component has cooled significantly. . One example of a casting apparatus having movable rolls and refractory components is disclosed in Australian Patents 63l728 and 637548 and corresponding US Pat. Nos. 5,184,668 and 5,277,243.

The present invention allows the twin roll strip casting apparatus to be laid in a modular configuration in which the casting roll is installed in a movable module that is easily movable in and out of the machine. Previous proposals for mounting rolls on a movable module are disclosed in Japanese Patent Publication No. JP-B93-9185 by Mitsubishi Havey Industry. In this proposal, the rolls and side plates are mounted together on a frame which is supported on a wheeled carriage that is horizontally movable in and out of the machine along the rail. The present invention provides another arrangement in which the roll module is moved horizontally to an intermediate position just below the final casting position and then pulled up to the casting position. This allows the rolls to move quickly to the casting position without requiring any movement of any accessory or component. In a preferred embodiment of the invention, the rolls are pulled to a position between a pair of casting pool confinement means without having to move the casting pool confinement means.

According to the invention, the invention

A pair of parallel casting rolls forming a nip therebetween;

Metal dispensing means for discharging the molten metal into the nip between the rolls to form a casting pool of molten metal supported on the casting roll surface directly above the nip;

Casting pool confinement means at the ends of the rolls defining the pool in preparation for overflow from the ends of the nip; And

In the continuous casting apparatus of a metal strip comprising a roll drive means for driving the casting rolls in the direction of mutual reverse rotation to produce a solidified strip of metal discharged downward from the nip,

The casting rolls are mounted on a roll module detachably installed from the casting apparatus as a unit,

The roll module is movable horizontally across the casting direction from an idle position located below and at one side to an intermediate position just below the casting position of the rolls, and then vertically to lift the rolls to the casting position. Move in the direction,

The apparatus is characterized in that it comprises lift means for lifting a roll module and rolls mounted thereon from the intermediate position to the casting position.

The lift means preferably comprise a liquid cylinder operated hoist.

The apparatus preferably comprises drive connecting means for automatically connecting the roll drive means to the casting roll when the roll module is in the intermediate position.

The device preferably comprises water connection means for automatically connecting the water cooling means to the rolls when the roll module is in the intermediate position.

The roll module preferably includes a module frame and a roll carrier movable on the module frame to allow overall movement of the rolls towards and away from each other to change the nip between the rolls.

The apparatus preferably includes roll deflection means operable to move the casting rolls towards each other from the open position to change the width of the nip when the roll module is in the casting position.

The casting pool confinement means is preferably in the casting position prior to moving the roll module from the standby position to the intermediate position and then to the casting position. Moving the roll module to an intermediate position just below the casting position and holding the casting roll in the open position indicates that there is no contact between the roll and the casting pool confinement means during installation of the roll. To ensure.

The roll deflection means is preferably operable to move the casting rolls away from each other.

The roll module is disposed between and directly below the nip to serve as a spacer stop for engaging the roll carrier so as to preset the initial width of the nip between the rolls. It is preferred to include adjustable stops that are width adjustable to change the original width.

Preferably, the roll deflection means is operable to move the casting rolls from the open position to the stop means and then deflect the rolls with respect to the stop means.

The roll module preferably comprises hold means for holding the roll carrier in the open position.

The holding means preferably comprises a locking pin assembly having a locking pin carried by the module frame which can be received in the openings of the roll carrier.

The locking pin is configured such that when the roll carrier and its upper roll is lifted from the intermediate position to the casting position, the roll carrier is moved away from the locking pin so that the roll carrier is not regulated by the locking pin. It is preferred to be fixed relative to the carrier.

The roll carrier may comprise a pair of roll end support structures for each of the rolls typically disposed below the ends of each roll.

Each pair of roll end support structures can bear a journal bearing that mounts each roll end to rotate about a central roll axis.

The roll end support structure may be mounted on the module frame for normal horizontal movement of the rolls towards and away from each other.

The module frame is preferably movable horizontally on the linear bearing in and out of the intermediate position of the casting apparatus.

The roll module can be firmly clamped in the vertical direction by the operation of a lift means for lifting the roll module such that the stop surface on the roll module contacts the stationary stop surface on the casting machine.

When the module frame is pulled up to provide for precise positioning of the module frame in the longitudinal direction of the roll, fitting means may be provided to align the module frame with the main machine frame.

The long roll deflection means may comprise a pair of deflection units for each roll, the deflection unit being connectable to the roll carrier.

This roll deflection unit can be supported on the movable mounting on the casting device such that they are moved to interlock with and actuate from the roll carrier.

In addition, the present invention,

A pair of parallel casting rolls forming a nip therebetween;

Metal delivery means for delivering the molten metal to the nip between the rolls to form a casting pool of molten metal held on the casting roll surface immediately above the nip;

Casting pool confinement means at the ends of the roll to prevent overflow from the ends of the nip;

In the continuous casting apparatus of a metal strip having a roll drive means for driving the casting roll in the direction of mutual reverse rotation to produce a solidified strip of the metal sent out from the nip,

The casting roll is mounted on a roll module detachably mounted to the casting apparatus as a unit;

The module,

Module frame; Roll carrier movable on the module frame to allow overall movement of the roll towards and away from each other to change the nip between the rolls: engaging the roll carrier to preset the initial width of the nip between the rolls And an adjustable stop disposed between the roll carriers and just below the nip to serve as a spacer stop for the width adjustment to change the original width of the nip.

According to the present invention, in the casting roll positioning method of the continuous strip casting apparatus,

Move the roll module 13 supporting a pair of parallel casting rolls 16 in a horizontal direction across the casting direction from a standby position located below and on one side of the casting position to an intermediate position just below the casting position. Making;

Connecting the roll (16) to the roll drive means (128) and the water cooling unit (42) in the intermediate position; And

It provides a casting roll positioning method of the continuous strip casting device comprising the step of lifting the roll module (13) to the casting position.

Preferably, the roll driving means and the water cooling unit are automatically connected to the rolls when the roll module is moved to the intermediate position.

Preferably, after the roll module is lifted to the casting position, the roll module is moved inward to a preset nip position.

The rolls are held apart before being lifted to the casting position, and this lifting movement preferably releases the rolls for inward movement.

DESCRIPTION OF EMBODIMENTS Hereinafter, specific methods and apparatus of the present invention will be described with reference to the accompanying drawings.

The illustrated casting apparatus is moved to the operating position of the casting apparatus as one unit, but supports the casting roll module in the form of a roll cassette 13 which can be easily detached when changing rolls. It is provided. The cassette 13 carries a pair of parallel casting rolls 16, which are laid via a ladle discharge nozzle 46, a tundish 17, a distributor 18, and a delivery nozzle 19. The molten metal is supplied from the fields (not shown) during the casting operation to form the casting pool 30 defined by the roll 16 and by the pair of casting pool trapping means 21. The casting roll 15 is water cooled to solidify the shell on the moving roll surface and to be attracted in the nip between the rolls to produce the solidified strip product 20 at the roll outlet. The product is transferred to a standard coiler.

The twin roll casting apparatus exemplified as described previously belongs to the type illustrated and described in more detail in Australian Patent No. 664670 and US Pat. No. 5,488,988, and in the appropriate structural description which is not constituted in any part of the present invention. The present invention can be made with reference to these patents.

The casting rolls 16 are rotated against each other via the drive shaft 41 from the electric motor and the transmission including the drive spindle 128 mounted to the main machine frame. This drive shaft 41 can be disconnected from the transmission when the cassette 13 is removed from the casting machine. The roll 16 is a series of lengths for supplying coolant through a roll end from a water supply duct (not shown) in a roll drive shaft 41 connected to a water supply hose 42 via a rotary gland 43. And a copper circumferential wall (not shown) formed in the circumferential direction and spaced at regular intervals in the circumferential direction. These rolls generally have a diameter of about 500 mm and a length of 2000 mm to make a strip product with a width of almost a roll.

The ladles are supported on a rotating turret (not shown) that leads to a position on the tundish 17 to fill the tundish as a structure used in its entirety. This tundish may be equipped with a sliding gate valve 47, which is operable by a servo cylinder to allow the melt to flow from the tundish 17 through the valve 47 and the refractory shroud 48 into the distributor 18. .

The distributor 18 has a wide plate shape made of a refractory material such as magnesium oxide (MgO). One side of the distributor 18 receives the melt from the tundish 17, and the other side of the distributor 18 has a series of discharge openings (not shown) at predetermined intervals along the longitudinal direction. The lower part of this distributor 18 carries a mounting bracket (not shown) for mounting the distributor to the main casting machine frame when the cassette is installed in the casting position.

The delivery nozzle 19 is formed as an extension made of a refractory material such as alumina graphite or the like. Its lower part is tapered inwardly and downwardly so as to project into the nip between the casting rolls 16. The upper side is formed with a side flange (not shown) protruding outward located on a mounting bracket (not shown) forming a part of the main frame.

The nozzles 19 are horizontal in order to provide a moderately low velocity discharge of metal throughout the width of the roll 16 and to deliver the melt to the nip between the rolls without directly hitting the roll surface where initial solidification occurs. It may have a flow passage (not shown) extending in the normal vertical direction spaced at predetermined intervals. In addition, the nozzle 19 may have a single continuous slot outlet (not shown) and / or be immersed in the melt pool to direct the low speed curtain of the melt directly into the nip between the rolls 16.

The casting pool confinement means 21 are made of a strong refractory material, such as boron nitride, and have a fan-shaped side edge to mate with the curved portion of the short binary end of the roll.

During the casting operation, the sliding gate valve 47 is operated to flow the molten metal from the tundish 17 to the distributor 18 and through the metal delivery nozzle 19 which causes it to flow out on the casting roll. The head end of the strip product 20 is led to a jaw of a coiler (not shown).

According to the present invention, the roll cassette 13,

(i) move horizontally across the casting direction of the casting apparatus (the casting direction indicated by arrow 'A' in the drawing) from the standby position located on one side of the casting apparatus to an intermediate position immediately below the casting position;

(ii) move vertically to the casting position;

2 shows the roll cassette 13 in an intermediate position, while FIGS. 4 and 5 show the roll cassette 13 in an elevated casting position.

By the movement of the roll cassette 13 to the intermediate position, the casting roll 16 is contacted and automatically connected to the drive spindle 128 and the water supply hose 42.

The roll cassette 13 is equipped with a casting roll 16, and the nip between them is configured in advance in the standby position before the cassette is installed in place in the casting machine.

The roll cassette 13 includes a large frame 102 supported on four wheels 121 (not shown) that support the top of the fire resistant closure member for enclosing the roll 16 and the casting strip under the nip. do. The casting apparatus includes a pair of rails 89 for guiding the wheel 121 between a standby position and an intermediate position. The roll 16 is mounted on a roll carrier 104 that bears a roll end bearing (not shown) mounted so that the rolls rotate about their longitudinal axis in parallel with each other. Two pairs of roll carriers 104 are mounted on the roll cassette frame 102 by linear bearings 106, thereby providing overall movement of the rolls 16 towards and away from each other. Sliding laterally of the cassette frame to allow separation and occlusion movement of the two parallel rolls between the open position shown in 4 and the preset nip position shown in FIG. 5.

This casting device is in the form of four fluid cylinder actuated hoists 71 supported by the machine frame 11, with the roll cassette 13 in an intermediate position, as best shown in FIGS. 2, 4 and 5. And lift means positioned to lie under the corner of the roll cassette frame 102. Operation of the hoists 71 pulls up the roll cassettes 13 to the casting position. The upward movement of the roll cassette 13 is limited by the flange 75 extending inward on the guide rail 89 which is contacted by the flange 77 extending outward on the roll cassette frame 102.

This roll 16 is held in the open position shown in FIG. 4 by four locking pin assemblies received in the vertical opening of the base of the roll cassette frame 102. Each pin assembly includes a locking pin 83 that is deflected upward by a spring 85. In the open position of the roll 16 shown in FIG. 4, this locking pin 83 extends into the opening 87 of the base of the roll carrier 104. The upward movement of the roll cassette frame 102 relative to the locking pin 83 moves the roll cassette frame 102 away from the pins, thus leading the roll 16 to the preset nip position shown in FIG. 5. The roll 16 is released to move inward by the operation of the roll deflection unit 51.

In addition, the roll cassette frame 102 is in the form of a worm or screw driven jack disposed below the roll 16 around a central vertical plane between the rolls 16 and positioned between the pair of roll carriers 104. Of the two adjustable spacers 107 (shown only in FIGS. 2 and 3 only) to serve as stops to limit inward movement of the two roll carriers, thus providing a preset nip position, ie the nip between the rolls. Defines the minimum width of. The roll deflection unit 51 acts to continuously deflect the roll carrier 104 inward toward these center stops, thereby preventing the spring springing movement of the roll against a preset biasing force. Allow.

Here, four roll deflection units 51 which act as a pair on the carrier 104 of each roll 16 are arranged in two pairs. Each roll deflection unit 51 includes a spring housing 111 containing a deflection spring 112 acting on a thrust rod 113 connected to each roll carrier 104 at its front end. The front end of each thrust rod 113 has an enlarged head 115 located in the keyhole opening 117 on one side of the roll carrier 104. The head 115 of this thrust rod 113 is located in the keyhole opening 117 as the roll cassette 13 moves from the standby position to the intermediate position. The vertical dimension of this keyhole 117 is enlarged to accommodate the vertical movement of the roll cassette 13 relative to the roll deflection unit 51 when the roll cassette 13 is lifted from the intermediate position to the casting position. Larger than the diameter of the head 115. Each unit 51 is supported on the main machine frame 11 by a linear bearing 116 in its front end position. When the roll cassette 13 is in the casting position shown in FIG. 4, the thruster rod 113 can be moved inward by the operation of the hydraulic cylinder unit, and as a result, the unit 51 is shown in FIG. 5. The roll 16 is moved to the preset nip position shown, which then provides a biasing action against the roll. The elastic biasing force of each roll deflection unit 51 acts on the motor 117 to adjust the compressive force in the spring 112 as the thread moves on the elastic plunger 118 to move the plunger. Is adjusted by.

The configuration of the casting machine illustrated allows the rolls to be precisely placed outside or off-line of the machine and rapidly installed as needed. Thus, the cassette change allows rolls to be exchanged between castings, and the nip space can be precisely preset. Since the space between the rolls is precisely set by the center stop and the roll deflection force deflects the roll inwards against this stop, it is also possible to preload the roll with the appropriate deflection force as soon as the cassette is installed. As with previous casting machines, there is no need to wait for the metal to pass through the rolls to develop a reaction force that impedes roll separation. In addition, the direct engagement of the roll deflection unit between the cassette frame and the roll carrier substantially eliminates friction in the spring control mechanism.

In addition, the configuration of the illustrated casting machine makes it possible to quickly and effectively change rolls without interference with the pre-positioned casting pool confinement means.

The illustrated casting machine is not limited to the examples only and can be modified considerably. For example, it is not necessary for the roll carrier to be mounted on the linear bearing for precise linear movement. They may alternatively be arcuate movements supported on the cassette frame on the pivot arms, providing the necessary lateral movement of the roll to allow proper elastic movement. This arrangement can further reduce the friction more effectively in the roll moving phase. Similarly, the roll deflection unit 51 may be mounted on the pivot arm and in a position to engage with the installation cassette by the operation of a hydraulic or pneumatic cylinder corresponding to the support pivot arm. The precise manner in which the cassette is transported in and out of the casting machine can also vary.

In addition, the spring deflection unit can be incorporated in the movable cassette. However, this requires more movable components, and since the exchange of each cassette is related to the exchange of load cells, this cell needs to be recalibrated at each change. Accordingly, a single set of load cells and biasing units are mounted on the main frame, and when the cassette is moved to its operating position, it is desirable to connect them to the roll carrier.

Therefore, it is to be understood that the present invention is not limited to the structural description of the illustrated casting apparatus, and that various modifications and changes are within the scope of the claims.

1 is a longitudinal sectional view of a strip casting device constructed in accordance with the present invention;

FIG. 2 is a side view of the casting apparatus showing the casting roll module in the intermediate position and the casting roll in the open position with the tundish and distributor removed for clarity in FIG.

3 is a side view of the roll module / casting roll separated from the casting apparatus for clarity in FIG. 2;

4 is a side view of a casting apparatus having a roll module in an elevated casting position and a roll in an open position;

5 is a side view of a casting apparatus having a roll module in an elevated casting position and a roll module in a preset nip space;

6 is a plan view of the casting apparatus,

7 is a plan view specifically showing the end section of the roll module / casting roll and the roll to the water supply hose and the roll drive spindle;

FIG. 8 is a section side view of the casting device shown in FIG. 7;

<Description of Symbols for Major Parts of Drawings>

13: roll module / roll cassette 16: casting roll

20: solidification strip product 41: drive shaft

42: water supply hose 43: rotary gland

51: roll deflection unit 83: locking pin

102: roll cassette frame 104: roll carrier

106: linear bearing 111: spring housing

112: deflection spring 113: thrust rod

117: keyhole

Claims (28)

A pair of parallel casting rolls 16 forming a nip therebetween; Metal dispensing means (46, 17, 18, 19) for discharging the molten metal into the nip between the rolls so as to form a cast pool of molten metal supported on the casting roll surface immediately above the nip; Casting pool trapping means 21 at the ends of the rolls 16 defining the pool 30 in preparation for overflow from the ends of the nip: and In the continuous casting device of a metal strip comprising a roll drive means 128 for driving the casting rolls in the direction of mutual reverse rotation to produce a solidified strip of metal 20 sent downward from the nip, The casting rolls 16 are mounted on a roll module 13 detachably installed from the casting apparatus as one unit, The roll module 13 is movable horizontally across the casting direction from a standby position located below and to one side of the casting position to an intermediate position just below the casting position of the rolls, and then the rolls to the casting position. To move vertically to lift, The apparatus comprises continuous means for lifting a roll module (13) and rolls (16) mounted thereon from the intermediate position to the casting position. The method of claim 1, The lift means (71) is a continuous casting device of a metal strip, characterized in that it comprises a liquid cylinder-operated hoist. The method according to claim 1 or 2, The device comprises drive connecting means (41) for automatically connecting the roll drive means (128) to the casting roll (16) when the roll module is in the intermediate position. Continuous casting equipment. The method according to claim 1 or 2, The apparatus comprises a water connecting means (42) for automatically connecting the water cooling means to the rolls when the roll module is in the intermediate position. The method according to claim 1 or 2, The roll module 13 is movable on the module frame 102 to allow full movement of the rolls 16 toward and away from each other to change the nip between the rolls and the module frame 102. Continuous casting apparatus of a metal strip comprising a roll carrier (104). The method of claim 5, The roll module 13 between and between the roll carriers 104 to serve as a spacer stop for engaging the roll carriers to preset the initial width of the nip between the rolls 16. And an adjustable stop means (107) disposed directly below the nip, the width of which is adjustable to change the original width of the nip. The method of claim 6, The device comprises a roll deflecting means 51 operable to move the casting roll from the open position to the stop means 107 and thereafter actuate the deflection of the rolls with respect to the stop means. Continuous casting of strips. The method of claim 5, The roll module (13) comprises a holding means (83, 85) for holding the roll carrier (104) in the open position. The method of claim 8, And said holding means comprises a locking pin assembly having a locking pin (83) carried by said module frame that can be received in openings in said roll carrier. The method of claim 9, The locking pin 83 is easily moved away from the locking pin when the roll carrier 104 and the roll thereon is lifted from the intermediate position to the casting position so that the locking pin 83 Continuous casting apparatus for a metal strip, characterized in that fixed to the roll carrier so as not to be regulated by). The method of claim 5, The roll carrier (104) comprises a pair of roll end support structures for each of the rolls normally arranged below the ends of each roll. The method of claim 11, Wherein each pair of roll end support structures (104) carries a journal bearing for mounting each roll end to rotate about a central roll axis. The method of claim 12, The roll end support structure (104) is mounted on a module frame (102) for normal horizontal movement of the rolls towards and away from each other. The method of claim 5, And the roll frame (102) is movable horizontally on the linear bearings (89, 121) in and out of the intermediate position of the casting machine. The method according to claim 1 or 2, The roll module 13 is operated in a vertical direction by the operation of the lift means 71 for lifting the roll module such that the stop surface 77 on the roll module contacts the stationary stop surface 75 on the casting apparatus. Continuous casting apparatus for metal strips, characterized in that clamped firmly. The method of claim 5, Continuous of metal strips, characterized in that fitting means are provided for fitting the modal frame with the main machine frame when the module frame is pulled up to provide precise positioning of the module frame in the longitudinal direction of the roll. Casting equipment. The method according to claim 1 or 2, The apparatus is characterized in that it comprises roll deflection means (51) operable to move the casting rolls towards each other from an open position to change the width of the nip when the roll module is in the casting position. Continuous casting of strips. The method according to claim 1 or 2, The casting pool confinement means (21) is a continuous casting device of the metal strip, characterized in that in the casting position, after moving the roll module (13) from the standby position to the intermediate position, and then before moving to the casting position. A pair of parallel casting rolls 16 forming a nip therebetween; Metal dispensing means (46, 17) for discharging the molten metal into the nip between the rolls so as to form a cast pool of molten metal held on the casting roll surface immediately above the nip; Casting pool trapping means (21) at the ends of the rolls in preparation for overflow from the ends of the nip; In the continuous casting device of the metal strip having a roll drive means 128 for driving the casting rolls in the direction of mutual reverse rotation to produce a solidified strip 20 of the metal sent out from the nip, The address roll 16 is mounted on a roll module 13 detachably installed from the casting apparatus as one unit, The module (13) comprises: a module frame (102): a roll carrier (104) movable on the module frame to allow full movement of the roll (16) towards and away from each other to change the nip between the rolls; And beneath the nip and between the roll carrier 104 to serve as a spacer stop for engaging the roll carrier to preset the initial width of the nip between the rolls. Continuous stopper of the metal strip characterized in that it comprises an adjustable stop means (107) adjustable width to change the width of. The method of claim 19, The apparatus comprises a roll deflection means (51) operable to deflect the roll carrier (104) against the stop means (107) when the module (13) is installed. Device. The method of claim 20, The roll deflection means 51 is operable to act between the module frame 102 and the roll carrier 104 to deflect the roll carrier 104 towards the adjustable stop 107. Continuous casting of metal strips. The method of claim 20 or 21, The roll deflection means 51 comprises a pair of deflection units for each roll, each deflection unit 51 having an elastic deflection of each roll 16 when the module is in its operating position. Continuously contactable to the module (13) to provide, the continuous casting device of the metal strip, characterized in that the module is releasable from the module to be removed from the casting device. The method of claim 22, And said deflection unit (51) is supported on a movable mounting on said casting device to move in interengaged and non-engaged operation with said module. In the casting roll positioning method of the continuous strip casting machine, Moving a roll module 13 supporting a pair of parallel casting rolls 16 in a horizontal direction across the casting direction from a standby position located below and on one side of the casting position to an intermediate position just below the casting position. step: Connecting the roll (16) to the roll drive means (128) and the water cooling unit (42) in the intermediate position; And Casting roll positioning method of a continuous strip casting machine comprising the step of lifting the roll module (13) to a casting position. The method of claim 24, And the roll driving means (128) and the water cooling unit (42) are automatically connected to the rolls when the roll module is moved to the intermediate position. The method of claim 24 or 25, And after moving the roll module to the casting position, moving the roll inward to a preset nip position. The method of claim 26, And said rolls are held apart prior to being lifted to said casting position, said lifting movement releasing said rolls for inward movement. The method of claim 24 or 25, A pair of casting pool confinement means 21, when in the casting position, are positioned one by one on both sides of the space to be occupied by the casting rolls, and the casting rolls 16 are formed by the roll module 13 being cast. The casting roll coincidence method of the continuous strip casting apparatus, characterized by moving upwardly between the casting pool confinement means (21) when lifted to the position.