JP3390899B2 - Molten metal pouring volume control device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is attached to the bottom of a molten metal container such as a ladle or a tundish, and slides a sliding plate to adjust the opening of a nozzle hole with respect to a fixed plate for melting. The present invention relates to a molten metal pouring amount control device for controlling the pouring amount of metal.

[0002]

2. Description of the Related Art A molten metal pouring amount control device usually has a nozzle hole, a fixing plate made of a refractory material which is detachably attached to a base fixed to a ladle, and a nozzle hole. , A slide plate made of a refractory material that is detachably attached to the slide frame, and by sliding the slide frame along the base, the opening degree between the nozzle hole of the fixed plate and the nozzle hole of the slide plate Is adjusted to control the pouring amount of the molten metal.

As a sliding method of the slide frame in such a molten metal pouring amount control apparatus, there are a metal sliding method and a roller sliding method. The basic structure of the metal sliding system has been widely used from the beginning of the development of this type of device to the present, and one example thereof is Japanese Patent Publication No. Sho 48-469.
No. 7, Japanese Patent Publication No. 7-75771, JP-A No. 7-16413
There is an invention described in Japanese Patent No. 4 publication.

In this metal sliding method, a lubricant is applied to the sliding surfaces of the fixed plate and the sliding plate and the sliding surfaces of the slide frame and the guide member, and the sliding plate is pressure-bonded to the fixed plate through the slide frame. The molten metal is prevented from leaking, and when sliding the slide frame to adjust the opening of the nozzle hole, the friction force generated on the sliding surfaces of the fixed plate and the sliding plate and the slide frame It is necessary to have a driving force equal to or more than the sum of the frictional force generated on the sliding surface with the guide member.

In this case, in particular, since the frictional force generated between the slide frame made of a metal material and the guide member is large, when the slide frame is driven, a high output drive means (usually a hydraulic cylinder is used). Used) and must have sufficient strength to withstand high loads. Further, since the slide frame and its guide member are worn, it is necessary to replace the slide frame, for example, before and after 500 heats, which increases maintenance costs such as disassembly and maintenance costs and parts costs. Since it is necessary to apply a lubricant to the sliding surfaces of the fixed plate and the sliding plate and the sliding surfaces of the slide frame and the guide member, it is troublesome.

However, in the metal sliding method, even if the slide frame slides, there is always a point of action of a force by a spring below the nozzle hole of the fixed plate and the nozzle hole of the sliding plate. There is an advantage that the pressing force around the nozzle hole that is most important as a seed device is secured,
This is a factor that keeps the mainstream until now.

The roller sliding system was developed in order to solve the problem of frictional force in the above-mentioned metal sliding system, and one example thereof is disclosed in JP-B-62-58816 and JP-B1-38592. There is an invention described. The former invention, as shown schematically in FIG.
06 is provided with position-fixed rollers 107a and 107b, a slide frame 105 having a slide plate 103 is installed on the rollers 107a and 107b, and a spring 1 interposed between a casing cover 109 and a guide member 106.
08, the sliding plate 103 is fixed to the fixed plate 101.
It is crimped to (hereinafter referred to as the fixed roller method).

In the latter invention, as shown schematically in FIG. 13, the slide frame 105 has rollers 107a,
107b is provided and installed on a guide member (rail) 106, and the sliding plate 103 is pressure-bonded to the fixed plate 101 by a spring 108 (hereinafter, referred to as a moving roller system). Such a roller sliding method can reduce the frictional force when the sliding plate is slid by using rollers, and can reduce the cost and maintenance cost of the device.

[0009]

In the roller sliding system as described above, the fixed roller system uses the rollers 107a and 107b when the nozzle holes 102 and 104 are fully opened, as shown in FIG. 12 (a). Fixed plate 10
The pressing force of the sliding plate 103 on the periphery of the nozzle hole 102 of No. 1 acts evenly, the periphery of the nozzle holes 102 and 104 are in close contact, and the fixed plate 101 and the sliding plate 1
There is no possibility that molten metal will enter during 03. However, since the positions of the rollers 107a and 107b are constant,
As the slide frame 105 moves in the closing direction (arrow direction) of the nozzle holes 102 and 104, as shown in FIG.
As shown in (b), the nozzle hole 1 of the sliding plate 103
The action points of the rollers 107a and 107b with respect to the periphery of 04 move, and the pressing force applied to the periphery of the nozzle hole 104 becomes unbalanced. Further, at the fully closed position of the nozzle holes 102 and 104, as shown in FIG.
04 is completely separated from the action points of the rollers 107a and 107b, and the pressing force around the nozzle holes 104 is reduced.

In such a state, the molten metal easily intrudes from the nozzle hole 102 between the fixed plate 101 and the sliding plate 103, and when the invading molten metal solidifies, the spring 108 cannot crimp the sliding plate 103. This is possible, and so-called molten metal leak occurs in which molten metal leaks from between the two.

On the other hand, in the moving roller system, contrary to the fixed roller system, as shown in FIG.
Although the pressing force around the nozzle hole 104 of the sliding plate 103 is stable, the pressing force around the nozzle hole 102 of the fixed plate 101 is as shown in FIG.
As shown in (b) and (c), the slide frame 105
Decreases as it moves in the closing direction (the direction of the arrow), so the same problem as in the fixed roll method occurs.

Also in such a fixed roller system and a moving roller system, if the distance between the rollers 107a and 107b is increased, the nozzle holes 102 and 104 will be fully opened to fully closed. The pressing force can be secured, but in this case, the lengths of the slide frame 105, the guide member 106, and the casing cover 109 must be naturally extended, and as a result, the device becomes significantly long and the cost is reduced. Not only does this increase, but it may not be possible to mount it on the bottom of the molten metal container.

Further, since the rollers 107a, 107b themselves have to be made small in size, the life of the shaft supporting them is short, and they must be replaced from time to time, so that sufficient maintenance cost reduction cannot be achieved. Furthermore, since the invention described in Japanese Patent Publication No. 62-58816 described above requires a lever or the like, and the invention described in Japanese Patent Publication No. 1-38592 requires complicated parts such as an intermittent rail. The price of the device itself cannot be expected to decrease. For this reason, the molten metal pouring amount control device by the roller sliding method is the mainstream as the sliding method of the slide frame, although it has the technical advantage that the sliding resistance of the slide frame is small. The current situation is that

The present invention has been made to solve the above-mentioned problems. The sliding resistance of the slide frame is small, the pressing force around the nozzle hole is stable, and there is no risk of water leakage or the like. Further, the object is to obtain a molten metal pouring amount control device having a simple structure and low manufacturing cost and maintenance cost.

[0015]

[Means for Solving the Problems] (1) A molten metal pouring amount control device according to the present invention includes a drive means for a slide frame, and a fixed plate having nozzle holes is attached to a molten metal container. A base, a frame openably and closably attached to the base via a hinge, and a slide plate having a nozzle hole are attached and accommodated in the frame so as to be horizontally slidable, and between the frame and the frame. The slide plate is composed of a slide frame in which the slide plate is crimped to the fixed plate by an interposed spring, and a plurality of steel balls linearly arranged between the slide frame and the spring on both sides of the slide plate. Equipped with a guide device
A molten metal pouring amount control device,
Clamp mounting hardware is attached to the side wall, and the clamp mounting hardware is
Insert the clamp from the clamp guide hole of the
The slide frame.
The slide under the clamp when the
Insert the cam provided on the upper surface of the id frame to
A machine for pressing down the ride frame against the biasing force of the spring.
It is characterized by having a structure.

(2) Further, the guide device of the above (1) is
A retainer in which a plurality of holes are linearly provided and steel balls are exposed at the top and bottom and are rotatably housed in the holes, respectively, an upper race having a guide groove on the lower surface and fixed to the lower surface of the slide frame, and an upper surface A guide frame and a lower race fixed to a spring receiver that is vertically movable on a plurality of springs between the guide frames, and the retainer is provided between the upper race and the lower race. It was composed by holding it.

(3) Further, the gap between the retainer of the above (2) and the upper race and the lower race is 0.1 to 1.0, respectively.
mm.

[0018]

1 is a perspective view showing a state in which a door according to an embodiment of the present invention is opened, FIG. 2 is a perspective view showing a state in which the door shown in FIG. 1 is closed, and FIG. 3 is related to the present invention. FIG. 4 is a vertical cross-sectional view showing a state in which the molten metal pouring amount control device is attached to the bottom of the molten metal container, and FIG. 4 is a bottom view showing a state in which the door of FIG. 3 is opened. In the figure, reference numeral 2 is a base fixed to a bottom portion 60 of a molten metal container (hereinafter referred to as a ladle, etc.), and a concave portion 3 is provided on the lower surface, and a nozzle hole 5 made of a refractory material is provided in the concave portion 3. The fixing plate 4 having the is accommodated and fixed by the fixing metal fitting 6.

Reference numerals 7a and 7b are cut-off portions provided on both side walls and into which a part of a clamp attachment metal piece described later is inserted. Reference numeral 8 is a bracket extending to one side of the base 2, to which a hydraulic cylinder 9 which is a driving means of a slide frame described later is attached, and a locking portion 10 is provided at a tip portion of the actuator. There is. Reference numerals 11a and 11b denote swing arms provided on one side wall orthogonal to the bracket 8.

Reference numeral 21 denotes a box-shaped frame which is attached to the base 2 via a hinge 15 so as to be openable and closable, and has an opening 22 on one side wall (on the side of the bracket 8 of the base 2). A vertical wall 23 is provided upright on both side walls orthogonal to the side wall, and a clamp insertion hole 24 is provided in the vertical wall 23.

Reference numeral 25 denotes a slide frame housed in the frame 21. A recess 26 is provided in the upper surface of the slide frame. A sliding plate 27 made of refractory and having a nozzle hole 28 is housed in the recess 26. And is fixed by the fixing bracket 29. The free surfaces of the fixed plate 4 and the sliding plate 27 are located at a position slightly higher than the surfaces of the base 2 and the slide frame 25 (for example, about 5 mm). Three
Reference numeral 0 denotes an engaging portion provided on the slide frame 25 on the side of the opening 22 of the frame 21 and engaging with the engaging portion 10 of the hydraulic cylinder 9. Reference numeral 31 has an inclined surface on one side. It is a liner (cam) provided on the upper surface of the slide frame 25 close to 23.

Reference numeral 35 is a guide device provided on both sides of the recess 26 on the lower surface of the slide frame 25. As shown in FIG. 5 and FIG. 6, this guide device 35 is provided with balls 36 made of steel balls and arranged in a line, and a plurality of holes 38 having a diameter substantially equal to the diameter of the balls 36. Ball 3 so that 36 does not touch and hinder rolling
6 has a retainer 37, which is rotatably housed in each hole 38 with its top and bottom exposed, and guide grooves 41 and 43.
It is composed of an upper race 40 and a lower race 42 arranged above and below. Reference numeral 44 is a wiper provided at both ends of the retainer 37, which is for moving with the ball 36 to clean the guide grooves 41, 43 of the upper and lower races 40, 42, which is essential to the present invention. Not the one
It may be omitted.

Referring again to FIG. 1 to FIG. 4, 45 is a spring seat vertically movable between the frame 21 and the slide frame 25, 46 is a plurality of spring guides provided upright on the bottom of the frame 21, 47 is the frame 21 and the spring seat 45
And a coil spring interposed between the spring guide 46 and the. The upper race 40 of the guide device 35 is fixed to the lower surface of the slide frame 25, the lower race 42 is fixed to the upper surface of the spring seat 45 to hold the ball 36 accommodated in the retainer 37, and the coil spring 47 is the spring. Seat 45,
The slide frame 25 is biased upward via the guide device 35, and the sliding plate 27 is pressure-bonded to the fixed plate 4. The frame 20, the slide frame 25, the guide device 35, and the like constitute the door 20 .

The ball 36 moves from the center of the nozzle hole 5 of the fixed plate 4 to the retracted side (hydraulic cylinder 9 side).
It is arranged in the range of (stroke of slide frame 25 + hole diameter of nozzle hole 5) / 2 or more and on the forward side in the range of (stroke of slide frame 25 + hole diameter of nozzle hole 5) / 2 or more. Also, the retainer 37 and the upper and lower races 40, 4
When 2 is in close contact, the sliding resistance increases, so an appropriate gap is required between them, but if the gap is too large, foreign matter will enter between the balls 36 and not only the sliding resistance will increase. , The ball 36 and the retainer 37 will be damaged.
This gap was set to 0.1 to 1.0 mm.

Numeral 50 is a clamp mounting hardware, which is side plates 51a and 51b formed substantially in an inverted L shape and both side plates 51a and 5b.
1b and a mounting plate 52 fixed between the mounting plate 5 and
2 is provided with a clamp guide hole 53 having the same size as the clamp insertion hole 23 provided in the frame 21. In this clamp mounting hardware 50, the mounting plate 52 is attached to the frame 2
The clamp guide hole 53 is brought into contact with the side wall of No. 1 to align the clamp guide hole 53 with the clamp insertion hole 23, and the screw inserted into the screw insertion hole 54 is screwed into the screw hole provided in the side wall to be attached.

Reference numeral 55 is a clamp which is inserted into the clamp guide hole 53 or the clamp insertion hole 23, and has a handle 56. 2 and 3, the clamp mounting hardware 50 and the clamp 55 are shown only on one side, but they are also provided on the other side. Reference numeral 61 denotes a nozzle hole 62, an upper nozzle attached to the bottom portion 60 of a ladle or the like, and 63 denotes a collector nozzle attached to the slide frame 25, having a nozzle hole 64.

Next, the operation of the present invention configured as described above will be described. The base 2 is assumed to be attached to the bottom portion 60 such as a ladle. First, the door 20 is rotated around the hinge 15, and the swing arms 11a and 11b are fitted into the U-shaped notches of the lock arms 24a and 24b provided on the frame 21, and the nuts are tightened and fixed. At this time, the engaging portion 10 of the hydraulic cylinder 9 is engaged with the engaging portion 3 of the slide frame 25.
The sliding plate 27 is pressed against the fixed plate 4 by the urging force of the coil spring 47.

Then, the slide frame 25 is retracted to the position shown in FIG. 4, for example, by the hydraulic cylinder 9. As a result, the nozzle hole 62 of the upper nozzle 61, the nozzle hole 5 of the fixed plate 4, the nozzle hole 28 of the sliding plate 27, and the nozzle hole 64 of the collector nozzle 63 are aligned and aligned on the same line, and Nozzle hole 5 and sliding plate 2
The nozzle hole 28 of No. 7 is fully opened, and the molten metal in the ladle or the like is discharged to the outside from the nozzle holes 62, 5, 28, 64.

In order to control the flow rate of the molten metal, the slide frame 25 is moved forward by the hydraulic cylinder 9 and stopped at a desired position, so that the nozzle hole 5 of the fixed plate 4 and the nozzle hole 28 of the sliding plate 27 are connected. The opening of is adjusted,
The flow rate is controlled according to this opening. Further, when the slide frame 25 is moved forward, the nozzle hole 5 is completely closed by the sliding plate 27. The nozzle holes 5,
The sliding direction of the slide frame 25 for adjusting the opening degree of 28 is not limited to the above, and can be changed appropriately.

When the door 20 is opened to replace the fixed plate 4 or the sliding plate 27, the swing arms 11a, 11 are urged by the strong biasing force of the coil spring 47.
It is difficult to remove b from the lock arms 24a and 24b. Therefore, in the present invention, the clamp guide holes 5 of the clamp attachment hardware 50 attached to the both side walls of the frame 21.
The clamp 55 is inserted into the clamp 3, and the clamp insertion hole 23 is projected onto the slide frame 25. Then, the slide frame 25 is moved forward (or backward) by the hydraulic cylinder 9.
Then, the liner 31 penetrates under the clamp 55,
The slide frame 25 is pressed against the biasing force of the coil spring 47. In this state, if the swing arms 11a and 11b are rotated as shown in FIG. 3, the lock arms 24a and 2b
It can be easily removed from 4b. When the door 20 is closed, the swing arms 11a and 11b are rotated to engage the lock arms 24a and 24b in the above state, the slight frame 25 is moved backward (or forward), and the liner 31 is removed from the clamp 55. The clamp 55 may be pulled out.

By the way, when the slide frame 25 is moved forward or backward as described above, the slide frame 25
Moves due to the rolling friction of the balls 36 of the guide device 35 interposed between the frame 21 and the frame 21, and most of the frictional resistance against sliding is friction between the fixed plate 4 and the sliding plate 27. Compared with the conventional metal sliding system, sliding resistance can be greatly reduced, and the hydraulic cylinder 9 can be downsized.

Further, when the slide frame 25 moves, the balls 36 also follow the movement and move while rotating. Therefore, as shown in FIG. 7, both the fixed plate 4 and the sliding plate 27 are always provided with the nozzle holes 5. There is a pressing force by the coil spring 47 below. Therefore, unlike the conventional roller sliding system, the pressing force does not become insufficient depending on the position of the slide frame.
There is no risk of molten metal entering between the fixed plate 4 and the sliding plate 27.

FIGS. 8 and 9 show the pressing force around the nozzle holes of the fixed plate and the sliding plate in the present invention and the fixed roller system and the moving roller system described above, which are calculated by corresponding to the stroke of the slide frame. 8 shows the pressing force around the nozzle hole of the fixed plate, and FIG. 9 shows the pressing force around the nozzle hole of the sliding plate. Now, assuming that the total pressing force is 4.6t, the pressing force is 4.6t in any case at the fully opened position (stroke 0) of the nozzle hole.

In the present invention A, the pressing force gradually decreases as the stroke becomes longer, but even at the fully closed position of the nozzle hole (stroke 110 mm), the pressing force is 3.2 t (when the nozzle hole is fully opened). About 70%). On the other hand, in the fixed roller method B, the pressing force around the nozzle hole of the fixed plate does not change even if the stroke becomes longer, but the pressing force around the nozzle hole of the sliding plate becomes significantly larger as the stroke becomes longer. As a result, the pressing force at the fully closed position of the nozzle hole is 1.8 t (about 40% of that when the nozzle hole is fully opened). Further, in the moving roller method C, the pressing force around the nozzle hole of the sliding plate does not change even if the stroke becomes longer, but the pressing force around the nozzle hole of the fixed plate decreases significantly as the stroke becomes longer. However, the pressing force at the fully closed position of the nozzle hole is 1.8t.

As is apparent from FIGS. 8 and 9, the present invention A
In the above, the pressing force in the vicinity of the nozzle hole of the fixed plate and the sliding plate gradually decreases as the stroke becomes longer, but the decreasing rate is small, and a substantially uniform pressing force can be obtained over the entire stroke. On the other hand, in the fixed roller system B and the sliding roller system C, the pressing force is significantly reduced as the stroke becomes longer between the time when the nozzle hole is fully opened and the time when the nozzle hole is fully closed.

10 and 11 show a device according to the present device,
With a device that applies the metal sliding method with the same configuration,
FIG. 10 is a diagram showing the results of direct measurement of the pressing force for each stroke around the nozzle holes of the fixed plate and the sliding plate. FIG. 10 shows the pressing force around the nozzle holes of the fixed plate as shown in FIG.
Reference numeral 1 indicates a pressing force around the nozzle hole of the sliding plate. As is clear from both figures, the pressing force of Invention A is higher than that of Metal Sliding Method D in almost the entire stroke region. This is because in the case of the metal sliding type, the length of the action point changes with the change of stroke,
In the case of the present invention, it seems that the length of the action point does not change even if the stroke changes.

When the present invention is compared with the metal sliding system, the sliding resistance of the present invention is significantly smaller, and
Although the pressing force of the fixed plate and the sliding plate is high, the workability is improved and the strength component can be downsized according to the present invention. For example, in the present invention,
To release the surface pressure required to open and close the door 20, use the frame 2
Although a clamp 55 is inserted into the clamp insertion hole 24 of No. 1 and the coil spring 47 is pressed down by the driving force of the hydraulic cylinder 9 via the slide frame 25, workability is improved, but metal sliding Since the sliding resistance is large in the method, it is difficult to adopt such a method.

Further, in the hinge and swing arm for opening and closing the door, in the case of the metal sliding system, the friction reaction force is concentrated on this portion, and therefore a large pin or bush is required. However, in the present invention, Since the friction reaction force applied to the door is almost zero, a very small pin or bush is sufficient. Further, in terms of maintenance, the present invention hardly wears the frame or the slide frame due to the use of balls, and the maintenance due to this portion is unnecessary. Along with this, the frequency of maintenance changes from the metal sliding part to the spring life, and in the metal sliding method, the frame and the slide frame are exchanged at about 500 heat, whereas in the present invention, the maintenance frequency is about 1000 heat. Only the coil spring needs to be replaced, which not only greatly improves the maintenance frequency, but also significantly reduces the cost of replacement parts.

[0039]

(1) The molten metal pouring amount control device according to the present invention comprises a slide frame driving means, a fixed plate having nozzle holes attached thereto, and a base mounted on the molten metal container. A frame that is openably and closably attached to the base via a hinge and a sliding plate that has a nozzle hole are attached so that the frame is slidably accommodated in the frame in a horizontal direction, and a sliding spring is interposed between the frame and the sliding plate. Since the moving plate is composed of the slide frame crimped to the fixed plate, and the guide device composed of a plurality of steel balls linearly arranged is arranged between the slide frame and the spring on both sides of the sliding plate. , Of the slide frame
It is possible to reduce sliding resistance and downsize the driving means.
Wear. Also, the pressing force around the nozzle hole is stable and there is no leakage of hot water.
There is no risk of problems, and the structure is simple and easy to maintain.
The nonce cost can be reduced. In addition, the frame
Attach the clamp mounting hardware to the side wall of the
Insert the clamp through the clamp guide hole and slide
The slide frame moves forward with the frame protruding.
Or when retracting, slide the frame under the clamp
Insert the cam provided on the top surface and slide the slide frame
Since it has a mechanism to roll down against the urging force of the bed,
Consists of a frame, slide frame and guide
You can now easily open and close the door.

(2) Further, the guide device of the above (1) is
A retainer in which a plurality of holes are linearly provided and steel balls are exposed at the top and bottom and are respectively accommodated in the holes, and an upper race having a guide groove on the lower surface and fixed to the lower surface of the slide frame,
It has a guide groove on the upper surface and a lower race fixed to a spring receiver that is vertically movable on a plurality of springs between the guide frame and the frame, and the retainer is provided between the upper race and the lower race. Since it is configured to be held in between, the adjacent steel balls do not come into contact with each other and hinder rolling, and the slide frame can slide smoothly. Further, the pressing force of the sliding plate by the spring can be stabilized regardless of the position of the slide frame.

(3) Further, the gap between the retainer of the above (2) and the upper race and the lower race is 0.1 to 1.0, respectively.
Since it is set to mm, the sliding resistance can be reduced, and there is no possibility that foreign matter may enter between the steel balls to increase the sliding resistance or damage the steel balls or the retainer.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which a door of an embodiment of the present invention is opened.

FIG. 2 is a perspective view showing a state in which the door of FIG. 1 is closed.

FIG. 3 is a vertical cross-sectional view showing a state in which the device of the present invention is attached to the bottom of a molten metal container.

FIG. 4 is a bottom view showing a state where the door of FIG. 3 is opened.

5A and 5B are a front view and a side view of the guide device of the present invention.

6 is a plan view, a front view, and a side view of the retainer of FIG.

FIG. 7 is an explanatory view of the operation of the present invention.

FIG. 8 is a diagram comparing the pressing force around a nozzle hole of a fixed plate of the present invention and a fixed plate of a conventional fixed roller type and a movable roller type.

FIG. 9 is a diagram comparing the pressing force around the nozzle holes of the sliding plate, similar to FIG.

FIG. 10 is a diagram comparing the pressing force around the nozzle hole of the metal sliding type fixing plate of the present invention.

FIG. 11 is a diagram comparing the pressing force around the nozzle holes of the sliding plate, as in FIG.

FIG. 12 is a diagram illustrating the operation of a conventional fixed roller system.

FIG. 13 is a diagram illustrating the operation of a conventional moving roller system.

[Explanation of symbols]

1 Molten metal control device 2 foundation 4 fixed plate 5 nozzle holes 9 hydraulic cylinder 10 Locking part 15 Hinge 20 doors 21 frames 24 Clamp insertion hole 25 slide frames 27 Sliding plate 28 nozzle holes 30 Engagement part 31 liner 35 Guide device 36 balls (steel ball) 37 retainer 38 holes 40 Top Race 41,43 Guide groove 42 Lower Race 44 wiper 45 spring seat 47 coil spring 50 Clamp mounting hardware 55 clamp

─────────────────────────────────────────────────── ─── Continuation of front page (73) Patent holder 000220767 Tokyo Ceramic Co., Ltd. 1-8-2 Marunouchi, Chiyoda-ku, Tokyo Steel Building (72) Inventor Hironori Yamamoto 1-1 Minamiwata-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa No. Japan Rotary Nozzle Co., Ltd. (72) Inventor Masahiko Mizuno 3-4-3 Ikegami-shinmachi, Kawasaki-ku, Kawasaki-shi, Kanagawa Steel Pipe Machinery Industry Co., Ltd. (56) References: 57-44668, JP (58) Fields surveyed (Int.Cl. ⁷ , DB name) B22D 37/00 B22D 11/10 340 B22D 41/38

Claims (3)

(57) [Claims] 1. A base provided with a driving means for a slide frame, to which a fixed plate having nozzle holes is attached and which is attached to a molten metal container, a frame attached to the base so as to be openable and closable via a hinge, and a nozzle. And a slide frame in which a sliding plate having a hole is attached and slidably accommodated in the frame in the horizontal direction, and the sliding plate is crimped to the fixed plate by a spring interposed between the sliding frame and the frame. A molten metal pouring amount control device comprising a guide device composed of a plurality of steel balls linearly arranged between the slide frame and the spring on both sides of the sliding plate.
Te, attach the clamp mounting hardware on the side wall of the frame,該Ku
Insert the clamp through the clamp guide hole of the lamp mounting hardware.
And project it onto the slide frame,
The clamp when the ride frame moves forward or backward
Insert the cam installed on the upper surface of the slide frame under
The slide frame against the biasing force of the spring.
Molten metal characterized by having a mechanism for
Pouring amount control device. 2. A lower surface of a slide frame having a guide device, a retainer in which a plurality of holes are linearly provided, steel balls are exposed at the upper and lower sides and are rotatably accommodated in the holes, respectively, and a guide groove is formed in the lower surface. An upper race fixed to the upper race, and a lower race fixed to a spring bearing that has a guide groove on the upper surface and is vertically movable on a plurality of springs between the guide frames. The molten metal pouring amount control device according to claim 1, wherein the molten metal is sandwiched between the upper race and the lower race. 3. The molten metal pouring amount control device according to claim 2, wherein the gaps between the retainer and the upper race and the lower race are each 0.1 to 1.0 mm.