JPS5921701B2 - sliding nozzle device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a sliding nozzle device (hereinafter referred to as S
In particular, we are improving the plate bricks, which are subject to significant wear or damage in the device, by making them into cassettes either individually or as a composite unit, so that the plate bricks can be loaded or replaced parallel to the sliding surface. A cassette-type SN configured to allow quick and accurate insertion, similar to loading or replacing a cassette.
It is related to the device.

(Summary of Prior Art) When an SN device is used in a molten metal container or gutter for pouring out molten metal, such as a casting ladle, it becomes extremely difficult to perform special and strict work processes such as vacuum casting or continuous casting. It is known to exhibit excellent functionality.

A normal SN device consists of at least two fixed plate bricks and a sliding plate brick with nozzle holes, a frame or housing (main body) that assembles these two plate bricks in a certain constraint relationship, and two plates. It consists of a mechanism that sets an appropriate surface pressure to prevent hot water from leaking between the contact surfaces of the bricks, and a drive mechanism that moves the sliding plate.

The typical SN device currently in use has its housing fixed to the bottom of the ladle.

The pair of plate bricks are integrated into the housing and have a twisted structure.

The disadvantage of this construction arises during the frequent replacement of consumable parts in the SN device, in particular the fixed plate bricks and the sliding plates.

In other words, in order to remove the plate bricks, the SN device housing must be removed from the bottom of the container, or at least the housing cover designed to allow the plate bricks to be removed must be removed, and the work must be done near the ladle in a high temperature atmosphere. ,
The content must be quite difficult.

The taken out plate brick is removed from the metal frame by breaking it.

Then, the inner surface of the metal frame is thoroughly cleaned, a new plate brick is attached to the metal frame, and the new plate brick is replaced by mortaring.

The sliding surface of the new plate brick is finished, then it is set into the housing and assembled precisely, the surface pressure is adjusted with high precision, and the fixing bolts are finally tightened to complete the replacement.

It takes about 1 hour to get there.

During this time, the ladle cannot be used.

A further serious drawback is that bolts cannot be tightened until the mortar is completely dry in order to provide sufficient strength to withstand surface pressure.

It is very difficult to tell whether the mortar is ready for bolting, especially since it takes a considerable amount of time for the mortar to fully bond.

As mentioned above, the current SN
The equipment has serious drawbacks that represent operational disadvantages in the replacement of consumable parts, and the human element has a large influence on the replacement process.

The influence of human factors is often manifested as non-uniformity of the sliding surfaces between the fixed plate and the sliding plate, resulting in various disadvantages.

(Objective of the Present Invention and Overview of the Invention) An object of the present invention is to improve the above-mentioned drawbacks of current SN devices.

In particular, the main cause of such defects is
The goal is to improve the replacement method and mechanism for consumable parts.

In the present invention, the above object is to improve the configuration of the SN device by:
・The housing (main body) and one or at least two fixed plate bricks provided with nozzle holes and/or a pair of sliding plate bricks are considered separately, and the pair of plate bricks can be considered separately, Alternatively, this has been achieved by forming a composite unit into a cassette, with the housing functioning as a receiver into which the cassette is inserted.

What is important in the present invention is that the fixed plate, the sliding plate, and their cassettes have guides with an appropriate shape or structure so that they can be easily loaded into the receiver.

The guide may be a cassette case with a built-in plate brick, the receiver itself, or a part thereof.

The guide includes all parts that come into contact with each other during loading of the cassette.

It can also be considered as a type of guide that the shape of the tip of the cassette becomes narrower toward the tip to make it easier to insert the cassette.

The guide is not limited to a curved surface and may be planar.

Further, the guides are not necessarily provided on both the upper and lower sides of the cassette.

Sometimes it is on both the left and right sides. They are not necessarily in symmetrical positions, such as vertically or horizontally.

It may be on only one side, or on three or four sides.

In particular, if the guide is only on the bottom side, it is also possible to configure the guide on the receiver side so that its entrance can be enlarged by movement of the cassette.

In that case, the lower guide also serves as a positioning guide.

In yet another case, a mechanism or structure devised so that the nozzle holes of the fixed plate and the nozzle holes of the sliding plate match may also correspond to a kind of guide.

Such guides are required in the cassette and/or receiver.

The positioning guide is always on the receiver side.

The guide may be provided in the cassette or receiver from the beginning, or may be attached to the adapter set later.

Depending on the case, the guide may also serve as a guide (mechanism) necessary for setting the surface pressure.

The guide does not always have a sliding motion.

It can also be guided by a gear rack mechanism.

The guide adapter is also configured so that it can be made longer or change its direction depending on the condition of the container, the workplace environment, the working conditions, the conditions of the cassette, and other objects.

The cassette can be configured, for example, in combination with rails, conveyors, etc., so that it can be transported or guided.

Further, the guide may be a combination of a rail and a roller, or a combination of these or the like alone or in combination with the SN or the SN.

The contact portion between the cassette and the receiver may have any shape as long as they correspond to each other, and is not particularly limited.

This also includes the meaning that the form of the entrance and exit of the cassette is not limited.

The cassette itself may be provided with a surface pressure setting mechanism, and an appropriate surface pressure may be applied in advance to the cassette before loading.

Alternatively, the structure may be such that it does not have a surface pressure setting mechanism and therefore is loaded without applying surface pressure.

That is, the cassette here refers to an independent structure in which at least two plate bricks forming a pair are used before being finally attached to the SN device.

The receiver may be fixed to the bottom of the container or may simply be shifted by some means to allow connection with the top nozzle.

In the latter case, a toggle mechanism, cam mechanism, spring mechanism, gear mechanism, cock, lever, or other mechanism or means positions the receiver containing the cassette in a fixed position, and at the same time sets the surface pressure. composition.

The receiver may include a portion of the container.

The receiver may store multiple cassettes at the same time.

There are cases where the same location serves as the entrance and exit for the cassette in the receiver, and there are cases where they are configured separately.

This is the case, for example, when the opposite side of the inlet is configured as an outlet.

The means for setting an appropriate surface pressure load on the pair of plate bricks and the means for fixing and positioning the receiver and cassette to the container are not particularly limited.

For example, in addition to a screw mechanism, it is configured by a toggle mechanism, a cam mechanism, a spring mechanism, a gear mechanism, a mechanism using a lever or a lever, or a combination thereof.

Such a mechanism may require any suitable mechanism by which the cassette ultimately fits and is securely secured in the container.

The direction in which the cassette is inserted into the receiver is perpendicular to the axis of the nozzle hole, that is, parallel to the sliding surface, and may be inserted from any angle around the axis of the nozzle hole.

Of course, there are no limitations to the position or posture during insertion.

In extreme cases, the plate brick and its attached elements and the elastic element for setting the surface pressure load can be constructed separately,
It is also possible to prepare a receiver for each object, provide a kite for each object, and combine them.

(Example) Next, the present invention will be explained by referring to an example shown in the drawings.

In order to explain the present invention in an easy-to-understand manner, the drawings omit most parts other than the relationship between the receiver and the cassette.

Instead, FIG. 1 shows that at least two fixed plates 1 and sliding plates 2 are separated and independent from the SN device main body 6,
This shows an embodiment in which only a pair of square plate bricks 1 and 2 are combined, held in a jig 3 as a so-called cassette, and mounted on a receiver 7 of an SN device main body 6.

As is well known, the SN device main body 6 fixed directly below the casting nozzle 5 in the ladle-like molten metal container 4 is configured as a frame or housing of steel structure.

A receiver 7 contained in the housing is assembled within the housing under certain mechanical constraints.

In particular, in the receiver T of this embodiment, compression coil springs 72, 72, .
The upper end of 2 is restrained by a spring receiving plate 73 that can be raised and lowered.

An upper case 74 is assembled onto the lower case 71 by bolts 75, and constitutes a type of container capable of accommodating a cassette.

Sliding frame 76 placed on spring receiving plate 73 and upper case 7
4 form a space 78 having a width and height that tightly accommodates the cassette.

At the entrance of the space 78, the upper case 74 and the sliding frame 76 are curved with a front floor, and serve as a kind of guide.

The fixed plate 1 and the sliding plate 2 are loaded into the space 78 as a combination, and the springs 72 act in the same manner as loading.
Appropriate surface pressure is applied.

FIG. 2 shows a pair of fixed plate 9 and sliding plate 10.
represents an embodiment in which the cassettes and the cassettes are each individually and individually a kind of cassette.

Also, this is an example in which the receiver and the SN device main body are integrated into one body, and there is no special connecting means for connecting the plate of the receiver to the casting nozzle.

Also in this embodiment, the receiver 8 is included in the SN device main body 6 fixed to the bottom of the molten metal container 4.

However, a sliding frame 82 is placed directly on the lower case 81 which is fixed or supported by the main body 6.

The upper case 83 is assembled to the lower case 81 by bolts 84 and constitutes a type of container, and the upper case 83 and the sliding frame 82 form a space 85 for loading a cassette. This is almost the same as the previous example.

A spring 86 for setting surface pressure load is attached to the bolt 84.

In addition, in order to easily load plate bricks as a cassette, both the fixed plate 9 and the sliding plate 10 are
The tip and rear ends thereof are provided with tapered portions or rounded portions 9a and 10a as guides.

The position of the guide is determined by the loading order.

However, such guides may be provided in all or part of the necessary locations from the beginning so that either one can be inserted first.

The plate dowel 501 forms a mortar joint and improves contact with the casting nozzle, but the dowel may also be formed on the casting nozzle side.

In the two embodiments described above, the connection between the fixed plate and the casting nozzle 5 and the means for setting or adjusting the surface pressure load may be performed by known means such as a torque mechanism, cam mechanism, screw mechanism, etc.

This point will be understood from the examples described below.

In order to prevent the loaded plate brick from moving within the receiver or housing, it may be necessary to provide a fixing mechanism for the plate brick on its four sides, arbitrary sides, or other parts.

Usually, this will be done by means such as screws, wedges, or cocks.

Also, when inserted as shown in Fig. 17, it should be parallel to the end face of the casting nozzle so that it can be connected to the casting nozzle at the same time (a simple surface may use a dowel as shown in Fig. 2). can be provided.

For example, the surface may be parallel to the sliding surface as shown in FIG.

Note that the loading direction of the plate bricks may be any direction as long as it is parallel to the sliding surface.

Next, at least two pairs of fixed plates and sliding plates are housed in a cassette case and temporarily assembled to form a cassette as a finished product, and loaded in parallel to the sliding direction of the plate bricks. An example of the case will be described.

First, FIG. 3 shows an embodiment in which the cassette includes an elastic element for setting surface pressure load, but is loaded without applying surface pressure.

As shown in FIG. 4, in the cassette 11, an upper case 111 and a lower case 112, which constitute a type of airtight container, utilize a vertical elongated hole 500 that allows a surface pressure setting type a, and a bolt 1
13... are connected in a movable state.

A compression coil spring 114 that applies a surface pressure load is installed on the lower case 112, and the upper end of the spring is restrained by a spring receiving plate 115.

The fixing plate 116 is fixed by means of mortar attachment to the upper case 111 or the like.

The sliding play 1117 is housed in a sliding metal frame 118, and the metal frame 118 is slidably mounted on the spring receiving plate 115.

On the other hand, the receiver 12 of the main body 6 is the cassette 11 described above.
It is a container or case with an extremely simple structure that can only accommodate the following.

The cassette entrance has a guide 12 that draws an arc on the front floor.
It has become L122.

In the deepest part of the receiver 12, there is a positioning bottle 124 suspended by a compression coil spring 123, which fits into the bottle hole 110 of the loaded cassette 11 and is configured to automatically position the cassette 11. ing.

In the case of this embodiment, the receiver 12 itself and the cassette 110 cases 111 and 112 may be considered as the main guides.

The actual height h of the receivers 12 is configured at intervals appropriate for setting the surface pressure in the cassette 11, and the surface pressure can be set at the same time by simply loading the cassette 11.

FIG. 5 shows an example in which the cassette does not have an elastic element for setting surface pressure load.

The cassette 13 is placed in the upper case 131 as shown in FIG. 6A.
and lower case 132, vertical bolts 133... and compression coil springs 134 that allow surface pressure setting allowance a.
...and movably connected.

The fixing plate 135 is fixed by means of mortar attachment to the upper case 131 or the like.

The sliding plate 136 is housed in a sliding metal frame 137, and the metal frame 137 is slidably mounted on the lower case 132.

A slide beam 138 is attached to the upper and lower cases in parallel to the direction in which the cassette is loaded.

The beam may be single or multiple.

The tip of the cassette 13 has a tapered kite 1 with a curved surface.
39 are provided.

Incidentally, the cassette 13 may be a cassette having no surface pressure setting elasticity as shown in FIG. 6B, but may be provided with a surface pressure setting allowance a using an elongated hole.

On the other hand, the receiver 14 of the SN device main body 6 is configured as a container or case that accommodates the cassette 13 described above.

In particular, on the bottom surface 141 of the receiver 14, a compression coil spring 142 for applying a surface pressure load is installed, and the upper end of the spring is restrained by a spring receiving plate 143.

The upper surface 144 of the receiver and the spring receiving plate 143 form a space 145 in which the cassette 13 is accommodated.

However, its spatial height is considerably smaller than the thickness of the cassette 13.

When the cassette 13 is loaded with its slide beam 138 aligned with the groove 146 on the receiver side, this pushes down the spring receiving plate 143, in other words, the spring 142
... works to generate appropriate surface pressure.

Other supplementary work is largely unnecessary.

The cassette 13 is fixed in place on the outlet side by a stopcock, bottle, wedge or other suitable fixing mechanism 147.

In the case of this embodiment, the cassette case and receiver, and the slide beam and its groove play important roles as guides.

Next, an embodiment using a cassette in which surface pressure can be set in advance will be described.

The cassette 15 shown in FIG.
When the lower case 152 and the lower case 152 are tightened with bolts in the structure as described above, an accurate surface pressure is set by adjusting the tightening force.

For this purpose, the sliding plate 154 is housed in a metal frame 155 in contrast to the fixed plate 153 that is fixed to the upper case 151, and the metal frame 155 is a movable plate that is slidably placed on the lower case 152. It is configured to be placed on a compression coil spring 157 for setting surface pressure load in the metal frame 156.

On the other hand, the SN device main body 16 is configured with a frame 16L 162 fixed to the bottom of the molten metal container 4 and a base plate 163 into a container structure capable of accommodating a cassette.

In particular, the accommodation space is quite large compared to the thickness of the cassette 15.

As described above, when the cassette 15 with the surface pressure set is loaded from the wide entrance/exit, it is placed on the base plate 163 and fixed with the fixing bolts 164 .

Then, the base plate 163 is lifted and fixed at a predetermined position by a toggle mechanism, cam mechanism, jack mechanism, etc. (not shown), and the casting nozzle 5
It is connected to

In FIG. 8, the receiver 17 of the SN device main body 6 fixed to the bottom of the molten metal container 4 not only accommodates the cassette 18, but also simultaneously positions and fixes the cassette 18 and sets the surface pressure load. It represents an example.

As shown in FIG. 9, the cassette 18 in this embodiment is also assembled in a structure that allows the upper and lower cassette cases 181 and 182 to be set to a surface pressure as described above.

At least two guide bins 183 and 184 are laterally protruded from both sides of the cassette 18 at regular intervals, divided into an upper case 181 and a lower case 182.

On the other hand, the receiver 17 has the guide pins 183 and 1
The feature is that a guide groove 171 into which the slider 84 slides is provided.

In particular, the portion into which the guide groove 1710 enters is a front-floor guide 172 with a linear inclined surface and a curved surface, and the portion 173 deeper than that is a parallel guide with an arbitrary width a.

Therefore, even if the surface pressure is not set in the cassette 18 in advance, the surface pressure can be set simply by loading the cassette 18, as long as the width a of the guide groove 171 is designed to be appropriate for setting the surface pressure.

If the cassette 18 has been set with an appropriate surface pressure in advance, the width a of the guide groove 1710 is designed to simply restrict the two sets of guide pins 183 and 184 loosely.

In the case of the embodiment shown in FIG. 10, the receiver 1 of the SN device main body 6
9 is a kite structure that simply supports the cassette 20.

When loaded, the cassette 20, on which the surface pressure has been set in advance, is suspended from the receiver.

That is, in the cassette 20 of this embodiment, as shown in FIG. 11, the protruding portions 203 on both sides of the upper case 201 fit into the grooves 191 of the receiver 19 and are guided.

The lower case 202 is coupled with bolts 204 so that surface pressure can be set or adjusted.

A spring 205 for setting a surface pressure load is installed in the lower case 202, and the upper end of the spring is restrained by a spring receiving plate 206.

The fixed plate brick 207 is fixed to the upper case 201 by means of mortar adhesion or the like.

The sliding plate brick 208//'i is housed in a sliding metal frame 209, and the metal frame 209 is slidably mounted on the spring receiving plate 206.

At the entrance of the groove 1910 of the receiver 19, a guide 192 with a curved surface and a front floor is provided.

The width of the groove 191 is approximately equal to the thickness of the upper case 201 of the cassette 20, and is configured to prevent rattling after loading.

Finally, remove the loaded cassette, especially the fixing plate.
An example of means for appropriately connecting the casting nozzle 5 will be described.

FIG. 14 shows a case using an eccentric cam.

That is, the SN device main body 2 fixed to the bottom of the molten metal container 4
Reference numeral 5 has a configuration in which a receiver 26 that accommodates a cassette 27 configured as described above is supported by an eccentric cam shaft 28.

When the cassette 27 is inserted into the receiver from the right side using the guide roller 26a installed in the artificial part of the receiver 26 as a guide, the eccentric camshaft 28 is rotated by a maximum of 90 degrees by a drive mechanism (not shown). The receiver 26 is pushed up by the lift of the eccentric cam 28a, and the connection with the casting nozzle 5 is established.

Further, although the guide roller 26a is attached to the receiver 26, it may of course be provided on the cassette side.

FIG. 15 shows an example of loading by lever operation.

That is, the SN device main body 2 fixed to the bottom of the molten metal container 4
9 has a container structure that can also serve as a receiver for accommodating the cassette 30.

The main body 2 is attached to a bracket 31 fixed to the left side of the main body 29.
A lever 32 running along both sides of 9 is hingedly connected by a pin 33.

A cassette 30 is inserted into the main body 29 from the right side, and support bolts 30a, 30a are horizontally attached to both sides of the cassette 30.

The bolt hole 30a passes through a fairly long bolt hole 32a in the horizontal direction provided in the lever 32 and an elongated hole 29a provided in the side surface of the main body 29 in an arc shape centered on the bottle 33.

As a result, when the lever 32 is turned counterclockwise several times by hand or a jack, the cassette 30 is lifted and connected to the casting nozzle 4.

When the cassette 30 is in the loading position, the right end 3 of the lever 32 can be
2b is fixed to the bracket 35 by some means.

In the case of FIGS. 14 and 15, the surface pressure can also be set by connecting the plate to the casting nozzle.

In the embodiment shown in FIG. 16, the left end of a receiver 3γ that accommodates a cassette 39 is hingedly connected to a bracket 36 fixed to the bottom of the molten metal container 4 through a bin 38.

As shown in the figure, the cassette 39 is inserted with the receiver 37 turned diagonally downward to the right, and the cassette 39 is inserted into the receiver 37.
Once inserted, it is secured by the receiver set screw 37a.

The receiver 37 is then rotated counterclockwise by an input or by an appropriate mechanism, and the right end of the receiver is positioned and fixed by a stud 41 driven into the lower part of the bracket 40.

FIG. 17 shows a case using a cassette 42 that can be loaded and connected to the casting nozzle 4 at the same time.

Of course, the casting nozzle 5 and the nozzle top surface 424 are made without dowels, and the end surfaces are parallel to the sliding surface as shown in FIG. It is also possible to connect with

This eliminates the need for a device for sliding the cassette toward the casting nozzle.

The cassette 42 is an upper and lower cassette case 421.4.
22 is assembled and configured in a structure that allows a surface pressure setting type,
At least two fixed plates and a sliding plate are assembled in the container in a fixed constraint relationship as described above.

However, in the case of this embodiment, it is optional whether the surface pressure is set before loading or after loading, depending on the circumstances at the time.

The present embodiment is characterized in that it has a nozzle portion 423 that protrudes upward and has a shape and structure that facilitates connection with the upper fixing plate or the casting nozzle 5.

As a specific example, as shown in FIG. is made as an inclined surface that matches it.

An example of the force method for forming an inclined surface is shown in FIG. 18, but the same effect can be obtained by forming an inclined surface on a portion or the entire surface of the mating portion (connecting portion).

The SN device main body 43 fixed to the bottom of the molten metal container 4 is
A receiver 431 that accommodates the cassette 42 is opened to the right.

A guide groove 432 that allows the nozzle portion 423 to enter is provided on its upper surface.

Therefore, the cassette 42 simply transfers it to the receiver 43.
1, the connection with the casting nozzle 5 is achieved, and no operation other than closing the opening of the receiver 431 with the lid 433 is required.

FIG. 19 shows another embodiment using an eccentric cam.

That is, the fixed plate 441 and the sliding plate L'-) 44
2, upper and lower cassette cases 443 and 44
The cassette 44 is surrounded by the SN device main body 4 and connected by bolts 445 in a structure that allows a surface pressure setting allowance.
It is inserted and placed on the base plate 451 of No. 5.

The base plate 451 has a hanging arm 4 supported by an eccentric shaft 453 on a bracket 452 fixed to the bottom of the molten metal container.
54, it is supported by a spring mechanism 455 that transmits surface pressure load and supporting force at the same time.

The trick is that the suspension arm 454 is positioned below the spring mechanism 455 and by rotating the lever 456, the eccentric camshaft 453 is lifted to provide the appropriate support force.

(Effects of the present invention, etc.) Since the present invention is carried out as described above, the insertion of the cassette into the receiver parallel to the sliding shaft, and the loading and unloading of the molten metal container 4, are limited to the SN device type. without any
It can be done easily, easily and extremely quickly.

Similarly, the positioning for communicating the nozzle hole of the fixed plate brick made into a cassette with the hole of the casting nozzle is
This can be done simply, easily and quickly without being limited to the type of N device.

The present invention can be widely implemented without being limited to the presence or absence of setting the surface pressure load of the cassette and the paralysis surface pressure load setting means.

Similarly, the present invention is not limited to the means for setting the cassette and receiver into the molten metal container 4, and can be implemented in a wide range of ways.

Using a system for assembling and repairing cassettes off-line makes the replacement work faster, more precise, and easier.

The present invention does not depend on the SN device with two plates, the SN device with three plates or more, and whether the movement mode of the sliding plate brick is reciprocating or rotary. , can be implemented in any type of SN device.

[Brief explanation of the drawing]

The drawings show different embodiments of the cassette-type SN device according to the present invention, with parts omitted from 1 to 1.
The figure and FIG. 2 are vertical cross-sectional views of a case where a fixed plate brick and a sliding plate brick are individually made into a cassette. Fig. 3 is a vertical cross-sectional view of the cassette including the elastic element for setting the surface pressure load, and Fig. 4 is the line IV-IV of Fig. 3.
FIG. FIG. 5 is a vertical sectional view when the elastic element is included in the main body side, and FIG. 6A is a sectional view taken along line Vl-Vl in FIG. FIG. 6B is a sectional view of another embodiment in which a cassette having no surface pressure setting elastic body is provided with the surface pressure setting type a using an elongated hole. Fig. 7 is a vertical cross-sectional view of the case using a cassette with surface pressure load adjusted in advance, Fig. 8 is a vertical cross-sectional view of the case using a cassette in which the surface pressure load can be set either before or after loading, and Fig. FIG. 2 is a simple perspective view of the cassette shown in FIG. Figure 10 is a vertical cross-sectional view of a case where the cassette is loaded with the surface pressure load completely adjusted, and Figure 11 is the X of Figure 10.
It is a sectional view taken along I-XI. FIG. 12 is a vertical cross-sectional view of the case where the cassette is mounted using a biased flood and a cam. FIG. 13 is a vertical sectional view when a cassette is installed using a lever mechanism. FIG. 14 is a vertical sectional view of an example in which the receiver is fixed by a cock. FIG. 15 is a vertical sectional view of an example of a cassette that can be connected to a casting nozzle at the same time as loading, and FIG. 16 is a perspective view for explaining the nozzle connection portion. FIG. 17 is a vertical sectional view of an example of loading by a cam mechanism.

Claims (1)

[Scope of Claims] 1. A sliding nozzle device for controlling pouring of molten metal, which is a combination of a main body configured to include a part fixed to a molten metal pouring part and functioning as a receiver, and a plate brick independent of the main body. A sliding nozzle device characterized in that the main body is equipped with an entrance/exit mechanism that allows one or at least two fixed plates and/or sliding plates to be inserted and set simultaneously or separately in parallel to a sliding surface. 2. A sliding nozzle device for controlling the pouring of molten metal, comprising a cassette in which one or at least two plates are housed in a case, and a main body that includes a part fixed to the molten metal pouring part and functioning as a receiver. A sliding nozzle device, characterized in that the main body has an inlet/outlet for inserting the cassette parallel to the sliding surface of the cassette, and a mechanism for fixing the cassette in a predetermined position. 3. A sliding nozzle device for controlling pouring of molten metal, characterized in that a main body or cassette including a portion functioning as a receiver is provided with a surface pressure setting mechanism for plate bricks. The sliding nozzle device according to item 2.