JP2024004080A - Casting equipment, casting method using the same, and casting manufacturing method - Google Patents

Abstract

To provide a casting tool which is used for a casting method in which a straw mat is arranged at a ladle port of a ladle and molten metal pouring is executed from the ladle port while damming up impurities with the straw mat, and can easily and suitably execute the setting and holding of the straw mat.SOLUTION: A casting tool comprises a straw mat holding body 2 having a biforked rod-shaped part 3 which is biforked in a horizontal direction at a tip side and supported slidably in a horizontal direction by a support body 1, and a holding member 4 for holding a straw mat held to the biforked rod-shaped part 3 of the straw mat holding body 2 from above which is supported to the support body 1 via a support rod 5. The biforked rod-shaped part 3 is inserted into a cylinder or a bag of a cylindrical or bag-shaped straw mat so that the straw mat is suspendedly held to the biforked rod-shaped part 3 in such a manner that the width direction center part of the straw mat is sagged by the biforked rod-shaped part 3 and the sagged width direction center part of the straw mat is held from above by the holding member 4.SELECTED DRAWING: Figure 5

Description

The present invention relates to a casting device used when pouring metal into a mold to produce a cast product with few impurities, a casting method using the same, and a method for manufacturing a casting.

When manufacturing a casting from molten steel, the ladle holding the molten steel is tilted and the molten steel is poured into a mold for casting. Impurities such as slag and slag are floating on the bath surface of molten steel held in a ladle, and when pouring molten steel, it is necessary to prevent impurities from entering the mold. For this reason, conventionally, in order to prevent impurities floating on the surface of the molten steel bath from flowing out from the pot mouth, a mushiro is placed at the pot spout, and molten steel is poured while the impurities are dammed up by the mushiro. The reason why Mushiro is used to dam impurities in this way is that (i) Mushiro has a low specific gravity and functions as a weir while floating on the molten steel at the pot mouth, so it only blocks impurities without interfering with the pouring of molten steel. (ii) Mushiro burns when it comes into contact with molten steel, but it takes at least 30 minutes to burn out, so it can function as a dam during the pouring time (generally about 15 minutes); (iii) Even if unburned remains from the mushiro get mixed into the mold, they will float to the surface of the molten steel bath in the mold and be burned by the heat of the molten steel, so there will be no negative impact on the quality of the product. This is due to the following reasons.

When pouring molten steel by applying a mushiro to the mouth of a ladle while damming up impurities, the mushiro is first set (placed) at the ladle mouth by hand or using tools. After that, the mushiro set in the mouth of the pot is held down using a long rod-like device while the hot water is being poured.
In contrast to this method of pouring molten steel while damming up impurities with a mushiro, Patent Documents 1 and 2 disclose techniques to prevent impurities from entering the mold by devising the ladle itself. has been done.

Japanese Patent Application Publication No. 2003-311385 Japanese Patent Application Publication No. 2006-326646

However, the techniques disclosed in Patent Documents 1 and 2 require major modification of the ladle, resulting in a significant increase in cost. In addition, in order to prevent impurities from entering, the passage of molten steel is narrowed, so when repairing the refractory inside the ladle after pouring, there is a problem that the work is difficult and repair is difficult.
On the other hand, in the above-mentioned method of pouring molten steel while damming up impurities with a mushiro, it is necessary to set the mushiro at the mouth of the pot and to hold the mushiro in place while pouring. . However, in these operations, it may not be possible to set the mushiro properly in the mouth of the pot, or it may take time to set it, and even if it can be set, the mushiro may fall off during both of the above operations. There is also. When such a trouble occurs, not only the workability of the casting operation is reduced, but also the temperature of the molten steel in the ladle is lowered, causing trouble in casting the molten steel.

Therefore, an object of the present invention is to provide a casting tool which is used when pouring metal from the ladle mouth while damming up impurities by placing a mushiro at the ladle mouth. The work of setting the mushiro and the work of holding the mushiro set in the mouth of the pot while pouring can be carried out smoothly and efficiently through a series of operations, and it also prevents the mushiro from falling off during or between these operations. An object of the present invention is to provide a casting tool that can prevent the above-mentioned problems. Another object of the present invention is to provide a casting method and a method for manufacturing a cast product that allow efficient casting work using such a casting tool.

The gist of the present invention for solving the above problems is as follows.
[1] Support (1);
a mushiro holder (2) having a horizontally bifurcated bifurcated bar-shaped portion (3) on the distal end side and supported by the support (1) so as to be horizontally slidable;
A member for pressing the mushiro held by the bifurcated rod-shaped part (3) of the mushiro holder (2) from above, and a pressing member (1) supported by the support body (1) via the support rod (5) 4),
By inserting the bifurcated rod-like part (3) into the tube or bag of the mushiro, a cylindrical or bag-shaped mushiro is suspended and held by the bifurcated rod-like part (3) so that the central part in the width direction of the mushiro hangs down. A casting tool characterized in that the pressing member (4) is configured to press down the hanging central part in the width direction of the barb from above.
[2] In the casting instrument of [1] above, the holding member (4) is supported by the support (1) by fixing the base end of the support rod (5) to the support (1),
Due to the elastic force caused by bending the support rod (5) in the longitudinal direction, the pressing member (4) is suspended from the bifurcated rod-shaped portion (3) of the Mushiro holder (2) at the center portion in the width direction of the Mushiro. A casting tool characterized by being pressed against the upper surface.

[3] In the casting instrument according to [1] above, the holding member (4) can be moved up and down on the support (1) by pivoting the base end of the support rod (5) to the support (1). The supporting rod (5) is movably supported and configured to move up and down by the driving force of the driving means (6),
Due to the driving force of the drive means (6) that moves the support rod (5) up and down, the pressing member (4) is moved in the width direction of the mushiro held suspended from the bifurcated rod-shaped part (3) of the mushiro holder (2). A casting tool characterized by being pressed against the upper surface of the central part.
[4] In the casting tool according to [1] above, the holding member (4) can be moved up and down on the support (1) by pivoting the base end of the support rod (5) to the support (1). movably supported,
Due to the rotational moment due to the weight of the holding member (4) and the support rod (5), the holding member (4) is suspended from the bifurcated rod-shaped portion (3) of the holding body (2) at the center portion in the width direction of the Mushiro. A casting tool characterized by being pressed against the upper surface.

[5] The casting tool according to any one of [1] to [4] above, further comprising a cart (7) on which the support (1) is mounted for moving the tool. utensils.
[6] In the casting tool according to any one of [1] to [5] above, the height of the mushiro holding body (2) and the holding member (4) can be adjusted by expanding and contracting the support body (1). A casting tool featuring:
[7] The casting tool according to any one of [1] to [4] above further includes a robot arm (17) that holds the support (1), and supports the support by operating the robot arm (17). A casting instrument characterized in that the position of the body (1) is adjustable.
[8] The casting tool according to any one of [1] to [7] above, wherein the holding member (4) has a protrusion (8) at its lower end that can bite into the mold. utensils.

[9] A casting method using any of the casting tools described in [1] to [8] above, in which the molten metal held in the ladle (B) is cast into a mold according to the steps (i) to (iv) below. A casting method characterized by pouring molten metal into (C).
(i) A cylindrical or bag-shaped mushiro (x) is suspended and held by the bifurcated rod-shaped portion (3) of the mushiro holder (2) provided in the casting instrument (A). At that time, by inserting the bifurcated rod-shaped part (3) into the tube or bag of the mushiro (x), the central part of the mushiro in the width direction hangs down and is held by the bifurcated rod-shaped part (3), and the pressing member (4) is held down from above at the center part in the width direction of the mushiro where it hangs down.
(ii) By moving the casting tool (A), the Mushiro (x) held on the bifurcated rod-shaped part (3) of the Mushiro holder (2) in the state of (i) above is moved to the ladle (B). Position it above the pot mouth (b).
(iii) By sliding the Mushiro holder (2) horizontally with respect to the support (1), the bifurcated rod-shaped part (3) of the Mushiro holder (2) can be attached to the cylindrical or bag-shaped Mushiro (x). The mushiro (x) is placed on the pot spout (b) along the shape of the pot spout (b), and the pressing member (4) presses the widthwise center part of the mushiro from above.
(iv) By tilting the ladle (B), molten metal is poured into the mold (C) from the ladle mouth (b) while impurities are dammed up by the mushiro (x).
[10] In the casting method of [9] above, in the step (i), a further caster is placed on top of the mushiro (x) which is suspended from the bifurcated rod-shaped part (3) so that the center part in the width direction of the mushiro hangs down. A casting method characterized in that one or more sheets of another mushiro (y) are stacked one on top of the other, and a pressing member (4) presses the central part of the mushiro in the width direction from above.

[11] A method for producing a casting using any of the casting tools set forth in [1] to [8] above, in which the molten metal held in the ladle (B) is subjected to the steps (i) to (iv) below. A method for manufacturing a casting, characterized by pouring the metal into the mold (C).
(i) A cylindrical or bag-shaped mushiro (x) is suspended and held by the bifurcated rod-shaped portion (3) of the mushiro holder (2) provided in the casting instrument (A). At that time, by inserting the bifurcated rod-shaped part (3) into the tube or bag of the mushiro (x), the central part of the mushiro in the width direction hangs down and is held by the bifurcated rod-shaped part (3), and the pressing member (4) is held down from above at the center part in the width direction of the mushiro where it hangs down.
(ii) By moving the casting tool (A), the Mushiro (x) held on the bifurcated rod-shaped part (3) of the Mushiro holder (2) in the state of (i) above is moved to the ladle (B). Position it above the pot mouth (b).
(iii) By sliding the Mushiro holder (2) horizontally with respect to the support (1), the bifurcated rod-shaped part (3) of the Mushiro holder (2) can be attached to the cylindrical or bag-shaped Mushiro (x). The mushiro (x) is placed on the pot spout (b) along the shape of the pot spout (b), and the pressing member (4) presses the widthwise center part of the mushiro from above.
(iv) By tilting the ladle (B), molten metal is poured into the mold (C) from the ladle mouth (b) while impurities are dammed up by the mushiro (x).
[12] In the manufacturing method of [11] above, in the step (i) above, the Mushiro (x) is further A method for producing a casting, characterized in that one or more sheets of another mushiro (y) are stacked one on top of the other, and a pressing member (4) presses the central part of the mushiro in the width direction from above.

The casting tool of the present invention has a mushiro placed at the mouth of the ladle, and when used when pouring metal from the ladle mouth while blocking impurities with the mushiro, it is possible to pour metal from the ladle mouth while holding down the mushiro. Since it is possible to set the mushiro to the ladle and hold the mushiro while pouring, it is easy to set the mushiro at the mouth of the ladle, and to hold the mushiro set at the ladle mouth while pouring the hot water. This can be carried out smoothly and efficiently through a series of operations, and it is possible to prevent the mushiro from falling off during or between these operations. Further, since the operator can operate the ladle while maintaining a distance from the ladle, the safety of the operator can be ensured.
Moreover, according to the casting method and the casting production method of the present invention using such a casting tool, the casting operation can be performed efficiently without mixing impurities into the mold.

A plan view schematically showing an embodiment of the casting tool of the present invention A side view schematically showing the casting instrument of the embodiment shown in FIG. A front view schematically showing the casting instrument of the embodiment shown in FIG. A plan view schematically showing the casting tool of the embodiment shown in FIGS. 1 to 3 in a state in which a mushiro is held. A side view schematically showing the casting instrument of the embodiment shown in FIGS. 1 to 3 with a mushiro held therein. A front view schematically showing the casting instrument according to the embodiment of FIGS. 1 to 3 in a state in which a mushiro is held. Drawing (ladle (front view seen from the pot mouth side) The state in which the bifurcated rod-like part of the Mushiro holder that constitutes the casting tool is pulled out from the Mushiro after the Mushiro held in the casting tool of the embodiment of FIGS. 1 to 3 is placed on the mouth of the ladle is shown. Schematic plan view Side view schematically showing the state in FIG. 8 A drawing schematically showing the state of FIG. 8 with a part of the casting tool cut away (front view of the ladle seen from the pot mouth side) An explanatory diagram schematically showing a situation in which molten steel is poured into a mold from the ladle mouth while holding down the mold placed at the ladle mouth with a holding member that constitutes the casting apparatus of the embodiment of FIGS. 1 to 3. A side view schematically showing another embodiment of the casting instrument of the present invention A side view schematically showing the casting instrument of the embodiment shown in FIG. 12 in a state in which a mushiro is held. A side view schematically showing another embodiment of the casting instrument of the present invention A side view schematically showing the casting instrument of the embodiment shown in FIG. 14 in a state in which a mushiro is held. A side view schematically showing another embodiment of the casting instrument of the present invention A side view schematically showing another embodiment of the casting instrument of the present invention 18(A) is a side view and FIG. 18(B) is a rear view schematically showing another embodiment of the casting instrument of the present invention. 19(A) is a front view, and FIG. 19(B) is a side view. Explanatory diagram showing a cylindrical mushiro and a bag-shaped mushiro used in the present invention

The casting tool of the present invention is designed to prevent the surface of the molten steel from falling when pouring molten metal such as molten steel (hereinafter, the case where the molten metal is "molten steel" as an example) from the ladle B to the mold C. A mushiro x to dam up floating impurities (slag, slag, etc.) is set (placed) on top of the pot mouth b of the ladle B, and the mushiro x is held at the position of the pot mouth b during pouring. It is a device used for
1 to 3 schematically show an embodiment of the casting tool of the present invention, with FIG. 1 being a plan view, FIG. 2 being a side view, and FIG. 3 being a front view.
This casting tool consists of a support 1, a mushiro holder 2 supported by the support 1 so as to be horizontally slidable, a presser member 4 supported by the support 1 via a support rod 5, and a tool. It is equipped with a truck 7 on which the support body 1 is mounted for movement. The components of these instruments are typically made of metal.

The support body 1 is composed of a columnar member (support column), and is placed in a work place via a pedestal part 9, but in this embodiment, it is mounted on a trolley 7 in order to move the instrument.
The Mushiro holder 2 has a main body 10 made of a substantially horizontal rod-like member, and a bifurcated rod-like portion 3 that is bifurcated in the horizontal direction on the distal end side. That is, this bifurcated rod-shaped portion 3 is composed of a pair of rod-shaped portions 30 that are parallel in the horizontal direction.
The Mushiro holder 2 is horizontally slidably supported by the support 1 by inserting its main body 10 into a horizontal guide hole 11 provided through the support 1. Note that the casting instrument can be provided with a fixing means that can detachably fix the Mushiro holder 2 to the support body 1 at an arbitrary or predetermined sliding position. Examples of this fixing means include a means that is attached to the support 1 and is fixed to the support 1 by tightening a bolt to press the Mushiro holding body 2 (main body part 10) against the inner surface of the guide hole 11. can.
The mushiro holder 2 suspends and holds the mushiro x by inserting (inserting) its bifurcated rod-shaped portion 3 into the cylinder or bag of the mushiro x.

The pressing member 4 is a plate-shaped member for pressing the mushiro x held by the bifurcated rod-shaped portion 3 of the mushiro holder 2 from above. This pressing member 4 is located at a lower position of the bifurcated bar-shaped part 3 (a lower position of the bifurcated bar-shaped part 3 when the Mushiro holder 2 is slid to the position for holding the Mushiro x) and between the bar-shaped parts 30. It is arranged at the center position so that the plate surface runs along the width direction of the instrument, and in that state is supported by the support body 1 via a substantially horizontal support rod 5.
Therefore, in this casting tool, by inserting (inserting) the bifurcated rod-like part 3 of the mushiro holder 2 into the cylinder or bag of the mushiro x, the central part in the width direction of the mushiro can be fixed. It is configured so that it is suspended and held by the bifurcated bar-shaped portion 3 so that it hangs down, and the pressing member 4 can press down (press down) the hanging central part in the width direction of the mushiro from above. Note that how the pressing member 4 presses down the Mushiro x suspended and held by the Mushiro holder 2 from above will be described later based on FIGS. 4 to 6.

Various configurations are conceivable for the structure in which the pressing member 4 presses down (presses) the mushiro x from above, but in this embodiment, the support rod 5 is bent in the longitudinal direction, and the elastic force of the bending is (Restoring force) gives the pressing member 4 a force to press down on the mushiro x. That is, the pressing member 4 is supported by the support 1 by fixing the proximal end of the support rod 5 to the support 1, and the elastic force (restoring force) caused by bending the support rod 5 in the longitudinal direction ), the pressing member 4 is pressed against the upper surface of the central part in the width direction of the mushiro x suspended and held by the bifurcated rod-shaped part 3 of the mushiro holder 2, and presses (presses) the mushiro x from above. Similarly, due to the elastic force (restoring force) caused by bending the support rod 5 in the longitudinal direction, the pressing member 4 presses (presses) the bar x placed at the mouth b of the ladle B from above. It is set as.

For this reason, the support rod 5 is configured to be able to bend moderately upward in the longitudinal direction, and its one end (tip) is connected and fixed to the upper back surface of the presser member 4, and the other end (base (end part) is connected and fixed to the side part of the support body 1.
As mentioned above, in this embodiment, it is necessary to bend the support rod 5 upward in the longitudinal direction, and the support rod 5 must follow the change in the height of the pot x due to the change in the height of the pot mouth b during pouring. Since the degree of bending of the rod 5 changes, the second moment of area, length, thickness, etc. of the support rod 5 are appropriately selected so as to produce an appropriate degree of bending in the longitudinal direction.
Further, in order to cause the pressing member 4 to press the mushiro x from above as described above due to the elastic force (restoring force) caused by bending the support rod 5 in the longitudinal direction, the pressing member 4 is pressed against the bifurcated rod-shaped portion 3. The height of the support rod 5 is selected appropriately so that the support rod 5 bends as described above in the longitudinal direction.

Preferably, the trolley 7 has a brake means (not shown) for stopping the trolley 7 during work. Although the cart 7 in this embodiment is a cart with casters, it may also be a cart that runs on a track such as a rail. Further, since the casting tool of the present invention only needs to be movable, the base portion 9 may be made to be able to slide on the base surface of the workshop without providing a cart or the like.
The size and dimensions of each component of the casting tool of the present invention are not particularly limited, and may be determined as appropriate depending on the size of the applied ladle B and pot mouth b, the size of the mushiro x used, etc., but, for example, Examples of sizes and dimensions include: In other words, the length L1 (see FIG. 1) of the bifurcated rod-shaped part 3 of the mushiro holder 2 is set by L×1.5 to L×0 with respect to the length L of the mushiro x used (see FIGS. 4 and 18). It should be about .4. The distance L2 (see Fig. 1) between the pair of rod-like parts 30 constituting the bifurcated rod-like part 3 is set to about w x 0.8 to w x 0.3 with respect to the width w of the mushiro x used (see Fig. 18). do. Also, the distance L3 between the tip of the bifurcated rod-like portion 3 (the bifurcated rod-like portion 3 when the Mushiro holder 2 is slid to the position for holding the Mushiro x) and the pressing member 4 in the longitudinal direction of the Mushiro holder (Fig. 1 (see FIG. 4, FIG. 18) is set to approximately L×0.1 to L×0.9 relative to the length L of the mushiro x used (see FIGS. 4 and 18). Further, the width w1 (see FIG. 1) of the holding member 4 is set to about L2×0.1 to L2×0.7 with respect to the distance L2 between the pair of rod-like portions 30.

Next, the state in which the Mushiro x is held in the casting instrument (Mushiro holder 2) of the embodiment shown in FIGS. The explanation will be based on 6. 4 to 6 schematically show the casting tool of the embodiment shown in FIGS. 1 to 3 in a state in which a mold is held, with FIG. 4 being a plan view, FIG. 5 being a side view, and FIG. 6 being a front view. It is a diagram.
Mushiro is a knitted fabric (or woven fabric) made of rice straw, rushes, etc., and is usually made from rice straw. The mushiro x used in the present invention is cylindrical or bag-shaped. FIG. 20 shows the mushiro x used in the present invention, FIG. 20(a) shows the cylindrical mushiro, and FIG. 20(b) shows the bag-shaped mushiro. In both FIGS. 20A and 20B, the upper diagram is a plan view, and the lower diagram is a perspective view. The cylindrical mushiro shown in FIG. 20(a) is made into a cylindrical shape by sewing a part of a planar mushiro together. As the bag-shaped mussel shown in FIG. 20(a), it is preferable to use what is called a barracuda.
Similar to the size of each component of the casting device of the present invention, the size of the mushiro x is not particularly limited, and can be determined as appropriate depending on the size of the applied ladle B and pot mouth B, the size of each component of the device, etc. For example, the width W may be 700 to 1000 mm, and the length L may be 600 to 900 mm.

When the cylindrical or bag-shaped Mushiro x is suspended and held by the Mushiro holder 2, by inserting the bifurcated rod portion 3 into the tube or bag of the Mushiro x, the bifurcated rod portion is inserted so that the center portion in the width direction of the Mushiro hangs down. 3 to hang and hold it. At this time, lift the holding member 4 upward by hand to bend the support rod 5 upward, and in this state, with the holding member 4 positioned above the mushiro Or insert it into the bag. At this time, the bifurcated rod-like part 3 does not need to be inserted over the entire length of the mushiro x, but in order to prevent the mushiro x from falling out from the bifurcated rod-like part 3, it is necessary to It is preferable that the bifurcated rod-shaped portion 3 is inserted into the length portion (see FIG. 4). In addition, it is preferable that the holding member 4 presses the mushiro x at a position as close to the center of the mushiro as possible, so in the length direction of the mushiro x to be held, the mushiro length L is measured from the center of the mushiro x. It is preferable to be located within a range of ×0.2 (that is, to hold the mushiro x at a position within that range) (see FIG. 4).

By inserting the bifurcated rod-shaped part 3 into the tube or bag of the mushiro x as described above and suspending the mushiro x from the bifurcated rod-shaped part 3 so that the central part in the width direction of the mushiro hangs down, the pressing member 4 is It will be located above the center in the width direction. Here, by releasing the holding member 4 that had been lifted by hand, the elastic force (restoring force of the bending) of the supporting rod 5, which is bending, causes the center part in the width direction of the barb to hang down from the bifurcated rod-shaped part 3. is in a state where it is pressed from above by the pressing member 4 (pressed state). This completes the attachment of the mushiro to the casting tool, and the mold is held in the casting tool (mushiro holder 2).

The pressing member 4 can be configured to press (press) the mushiro x from above using a mechanism different from the embodiment shown in FIGS. 1 to 6 described above. 12 and 13 and FIGS. 14 and 15 each show an embodiment of a casting instrument equipped with such a holding member 4. FIG.
FIG. 12 is a side view schematically showing another embodiment of the casting tool of the present invention, and FIG. 13 is a side view schematically showing the casting tool of the embodiment of FIG. FIG.
In this embodiment, the holding member 4 is vertically movably supported on the support 1 by having the proximal end of the support rod 5 pivoted on the support 1, and is also supported by the driving force of the driving means 6. The rod 5 is configured to move up and down. The driving force of the driving means 6 causes the presser member 4 to be pressed against the upper surface of the central portion in the width direction of the mushiro x suspended from the bifurcated rod-shaped portion 3 of the mushiro holder 2.
Here, examples of the drive source of the drive means 6 include a direct-acting actuator such as a hydraulic cylinder, a rotary actuator, a motor, etc., and the drive means 6 supports the drive means 6 by interposing an appropriate power transmission mechanism as necessary. Move rod 5 up and down.

Moreover, FIG. 14 is a side view schematically showing another embodiment of the casting tool of the present invention, and FIG. 15 is a side view schematically showing the casting tool of the embodiment of FIG. FIG.
In this embodiment, the holding member 4 is supported by the support 1 so that the base end of the support rod 5 is pivoted 12 on the support 1 so as to be movable up and down. Then, due to the rotational moment due to the weight of the holding member 4 and the support rod 5, the holding member 4 is pressed against the upper surface of the center portion in the width direction of the Mushiro x suspended from the bifurcated bar-like portion 3 of the Mushiro holding body 2. be.

FIG. 16 is a side view schematically showing another embodiment of the casting tool of the present invention, in which the Mushiro holding body 2 and the pressing member 4 are This allows for height adjustment.
In this embodiment, the heights of the holder 2 and the pressing member 4 can be adjusted by expanding and contracting the support 1. Specifically, the support body 1 is composed of a lower member 13a and an upper member 13b that can be raised and lowered relative to the lower member 13a, and the upper member 13b slidably holds the Mushiro holder 2, and supports A pressing member 4 is held via a rod 5. For example, the upper member 13b may be manually slid up and down with respect to the lower member 13a, and may be removably fixed at any height position by an appropriate fixing means, or the lower member 13b may be fixed by an appropriate driving means. It may be slid up and down with respect to 13a and held at an arbitrary height position.

FIGS. 17 and 18 are side views schematically showing other embodiments of the casting tool of the present invention, in which the support body 1 (and the Mushiro holder 2 and the pressing member supported thereon) are used instead of the trolley. 4) In order to move the support body 1 (and the Mushiro holder 2 and presser member 4 supported by it) forward and backward relative to the ladle B, and to accommodate the height of the ladle mouth b of the ladle B, etc. In order to adjust the height, the support 1 is held by a robot arm 17 (preferably a robot arm 17 having degrees of freedom of three or more axes), and by operating this robot arm 17, the support 1 is positioned. It is adjustable.
In the embodiment shown in FIG. 17, the support 1 is held by a robot arm 17 of a general-purpose 6-axis articulated robot. The arm 17 holds the support 1 (and the Mushiro holder 2 and the pressing member 4 supported by the support 1). Naturally, each shaft member (arm portion) that constitutes the robot arm 17 is driven by a drive mechanism.

In the embodiment shown in FIG. 18, the support 1 is held by a robot arm 17 of a three-axis orthogonal robot. The robot arm 17 of this embodiment moves on a first slider 18 that moves on a rail 21 provided along the instrument width direction, and on a rail 22 provided along the vertical direction of this first slider 18. A second slider 19 , a cylinder body 201 is fixed to the second slider 19 , and a cylinder device 20 (such as a hydraulic cylinder) in which an actuating rod 200 moves back and forth along the longitudinal direction of the Mushiro holder 2 are provided. By connecting the tip of the actuating rod 200, which is the tip 170, to the side of the support 1, the robot arm 17 can hold the support 1 (and the Mushiro holder 2 and pressing member 4 supported by it). ing. The first slider 18 and the second slider 19 are slidably driven by a known drive mechanism.
By operating the robot arm 17 by holding the support body 1 (and the Mushiro holding body 2 and pressing member 4 supported by it) by the robot arm 17 as in the embodiments of FIGS. 17 and 18, The support body 1 (and the Mushiro holder 2 and the pressing member 4 supported by the support body 1) can be moved forward and backward with respect to the ladle B, and in order to correspond to the height of the pot mouth b of the ladle B, etc. , the height of the support body 1 (and the Mushiro holder 2 and the pressing member 4 supported by the support body 1) can be adjusted.
The robot arm 17 performs a predetermined operation according to an operator's operation or according to a pre-programmed operation procedure, and adjusts the position of the support 1 (and the Mushiro holder 2 and holding member 4 supported by it) as described above. I do.

FIG. 19 shows another embodiment of the pressing member 4, with FIG. 19(A) being a front view and FIG. 19(B) being a side view.
This pressing member 4 has a protrusion 8 at its lower end that can bite into the mushiro so that it can stably press the mushiro x from above. In this embodiment, sawtooth protrusions 8 are provided along the lower end of the holding member 4.
In addition, in order to adjust the pressing force when pressing the mushiro x from above, this pressing member 4 can adjust the connection position of the support rod 5 in the height direction and change the amount of bending of the support rod 5. It's like this. A vertically long mounting hole 14 for attaching a support rod is provided through the presser member 4, and a threaded portion 15 is provided at the tip of the support rod 5 connected to the presser member 4. The tip of the support rod 5 is inserted into the mounting hole 14, and a pair of nuts 16 are attached to the threaded portion 15 so as to sandwich the holding member 4. By tightening the support rod 5, the support rod 5 is connected and fixed to the pressing member 4. By selecting the insertion position of the tip of the support rod 5 into the vertically elongated attachment hole 14, the connection position of the support rod 5 with respect to the pressing member 4 can be adjusted in the height direction.

Next, an embodiment of a casting method (or mold manufacturing method) using the above-mentioned casting tool A of the present invention will be described based on FIGS. 7 to 11. Hereinafter, a case will be described in which the instrument according to the embodiment shown in FIGS. 1 to 6 is used, but the same applies to the case where the instrument according to the other embodiments is used.
Here, FIG. 7 shows a state in which the mold held in the casting tool according to the embodiment of FIGS. 1 to 3 is placed on the mouth of the ladle, with a part of the casting tool in cross section. FIG. 2 is a schematic drawing (a front view of the ladle viewed from the pot mouth side). FIG. 8 shows that after placing the Mushiro held in the casting tool of the embodiment of FIGS. FIG. 3 is a plan view schematically showing a state in which it has been pulled out. 9 is a side view schematically showing the state shown in FIG. 8, and FIG. 10 is a drawing schematically showing the state shown in FIG. (front view). FIG. 11 schematically shows a situation in which molten steel is poured into a mold from the ladle mouth while holding down the mold placed at the ladle mouth with the holding member that constitutes the casting apparatus of the embodiment of FIGS. 1 to 3. FIG. In addition, in FIGS. 7 and 9 to 11, molten steel and impurities are shown in ladle B to make the explanation easier to understand.
In centrifugal casting of molten steel, alloys and scrap iron are melted in a melting furnace to adjust their composition. At that time, the generated impurities (slag, slag, etc.) are removed, but when transferring the molten steel to the ladle in the melting furnace, impurities that have floated to the bath surface are also removed. The ladle is then transported by crane to a centrifugal casting machine and poured. At this time, impurities that could not be completely removed and impurities that have newly surfaced are floating on the surface of the molten steel bath in the ladle.

In this casting method, the casting tool A of the present invention is used to pour the molten steel held in the ladle B into the mold C according to the following steps (i) to (iv) to prevent impurities from entering the mold C. Casting of molten steel is carried out (manufacturing castings) while preventing.
(i) Place the casting tool A at a certain distance from the ladle B, and adjust the heights of the mold holder 2 and the pressing member 4 as necessary (for example, in the case of the embodiment shown in FIG. 16). Then, as shown in FIGS. 4 to 6, a cylindrical or bag-shaped mushiro x is suspended and held on the bifurcated rod-shaped portion 3 of the mushiro holder 2 provided in the casting instrument A. At that time, by inserting the bifurcated rod-shaped part 3 into the tube or bag of the mushiro x, the central part of the mushiro in the width direction hangs down and is held by the bifurcated rod-shaped part 3, and the presser member 4 hangs down the width of the mushiro. The central part in the direction is pressed from above (pressed state). In other words, the pressing member 4 presses down the hanging central portion in the width direction of the barb from above by the elastic force (restoring force of the bending) of the bending support rod 5. The details of the work and the preferred conditions for holding Mushiro are as explained above.
(ii) Next, the casting tool A is moved by the trolley 7, and the Mushiro x held on the bifurcated rod-like part 3 of the Mushiro holder 2 in the state of (i) above is placed in the ladle B as shown in FIG. Position it above pot mouth b.

(iii) Next, as shown in FIGS. 8 to 10, by sliding the Mushiro holder 2 horizontally with respect to the support 1 (retreating it with respect to the ladle B), the Mushiro holder 2 is separated into two forks. The rod-shaped part 3 is pulled out (extracted) from the cylindrical or bag-shaped mushiro x. As a result, the mushiro x is placed on the pot spout b along the shape of the pot spout b, and the holding member 4 is moved to the mushiro width by the elastic force (restoring force of the bend) of the support rod 5 that has been bent. The central part in the direction is pressed from above (pressed state). As a result, the mushiro x is set on the pot spout b and is pressed from above by the pressing member 4.
(iv) Thereafter, as shown in FIG. 11, by tilting the ladle B, molten steel is poured into the mold C from the ladle mouth b while impurities are dammed up by the mushiro x, and casting is performed. During this pouring, the mushiro x is held down from above by the holding member 4 while floating in the molten steel at the position of the pot mouth b, so that it functions as a weir for impurities. That is, only the impurities are dammed up by the mushiro x without interfering with the pouring of molten steel, and the impurities are prevented from entering the mold C.
Note that the height position of the holding member 4 may be adjusted as necessary in accordance with the change in the height of the ladle mouth b due to the tilting of the ladle B (for example, in the case of the embodiment shown in FIG. 16).
After pouring, the pressing member 4 is lifted to release the mushiro x (unburnt mushiro x), the mushiro x remains in the ladle B together with impurities, and the casting tool A is retreated.

In the above-described casting method (or mold manufacturing method), by using the casting tool A of the present invention, it is possible to set the mushiro x in the pot mouth b of the ladle B while holding it down with the tool, and to pour the molten metal. You can hold Mushiro x for a while. Therefore, the work of setting the mushiro x on the pot spout b of the ladle B and the work of holding the mushiro x set on the pot spout b during pouring can be carried out smoothly and efficiently through a series of operations. It is also possible to appropriately prevent the Mushiro x from falling off during or between operations.
Further, since the series of steps (ii) to (iv) above can be carried out while the operator maintains a distance from the ladle B, the safety of the operator can be ensured.

Further, when using the casting instrument A of the embodiment shown in FIGS. 12 and 13, in the step (i) above, the pressing member is 4 is pressed against the upper surface of the central part in the width direction of the mushiro x suspended and held by the bifurcated bar-like part 3 of the mushiro holder 2. Further, in the step (iii) above, the pressing member 4 presses the center portion in the width direction of the rod from above due to the driving force of the driving means 6 that moves the support rod 5 up and down.
Furthermore, when using the casting tool A shown in FIGS. 14 and 15, in the step (i) above, the pressing member 4 is rotated due to the rotational moment due to the weight of the pressing member 4 and the support rod 5. , is pressed against the upper surface of the central part in the width direction of the mushiro x suspended and held by the bifurcated rod-shaped part 3 of the mushiro holder 2. Further, in the step (iii) above, due to the rotational moment due to the weight of the presser member 4 and the support rod 5, the presser member 4 is in a state where it presses the center portion in the width direction of the barb from above.
In addition, when using the embodiment of FIG. 17 or FIG. 18 as the casting tool A, by operating the robot arm 17, the support 1 (and the Mushiro holder supported by it) can be used instead of the trolley 7. In order to move the support body 2 and the holding member 4) forward and backward with respect to the ladle B, and to correspond to the height of the pot mouth b of the ladle B, the support body 1 (and the Mushiro holder 2 supported by this The height of the holding member 4) is adjusted.

In addition, if there is a concern that the Mushiro x will burn out due to contact with the molten steel during pouring of molten steel, one or more additional Mushiro y may be placed on top of the Mushiro x suspended and held by the Mushiro holder 2. You can do it like this. In this case, in the step (i) above, one or more Mushiro y is stacked on top of the Mushiro x which is suspended and held on the bifurcated bar-shaped part 3 so that the center part in the width direction of the Mushiro hangs down, and the Mushiro is pressed down. The member 4 is in a state in which it presses the center part in the width direction of the bar. Mushiro y does not come into contact with molten steel at first, so it may be wetted with water to make it last longer.
The casting device of the present invention and the casting method using the same (or the method for manufacturing a mold) can be applied not only to casting molten steel but also to casting various molten metals.
Furthermore, there are no particular restrictions on the type of casting or object to which the casting method (or mold manufacturing method) of the present invention is applied; for example, centrifugal casting of a roll body for a rolling roll is an example; but not limited to.

1 Support body 2 Mushiro holder 3 Bifurcated rod-shaped part 4 Holding member 5 Support rod 6 Drive means 7 Dolly 8 Projection 9 Pedestal part 10 Main body part 11 Guide hole 12 Pivot part 13a Lower member 13b Upper member 14 Mounting hole 15 Threaded part 16 Nut 17 Robot arm 18 First slider 19 Second slider 20 Cylinder device 21, 22 Rail 30 Rod-shaped part 170 Robot arm tip 200 Operating rod 201 Cylinder body A Casting tool B Ladle C Mold b Pot mouth x, y Mushiro

Claims (12)

a support (1);
a mushiro holder (2) having a horizontally bifurcated bifurcated bar-shaped portion (3) on the distal end side and supported by the support (1) so as to be horizontally slidable;
A member for pressing the mushiro held by the bifurcated rod-shaped part (3) of the mushiro holder (2) from above, and a pressing member (1) supported by the support body (1) via the support rod (5) 4),
By inserting the bifurcated rod-like part (3) into the tube or bag of the mushiro, a cylindrical or bag-shaped mushiro is suspended and held by the bifurcated rod-like part (3) so that the central part in the width direction of the mushiro hangs down. A casting tool characterized in that the pressing member (4) is configured to press down the hanging central part in the width direction of the barb from above. The pressing member (4) is supported by the support (1) by fixing the base end of the support rod (5) to the support (1),
Due to the elastic force caused by bending the support rod (5) in the longitudinal direction, the pressing member (4) is suspended from the bifurcated rod-shaped portion (3) of the Mushiro holder (2) at the center portion in the width direction of the Mushiro. The casting tool according to claim 1, wherein the casting tool is pressed against the upper surface. The holding member (4) is vertically movably supported by the support (1) by pivoting the base end of the support rod (5) to the support (1), and also has a drive means (6). The support rod (5) is configured to move up and down with the driving force of
Due to the driving force of the drive means (6) that moves the support rod (5) up and down, the pressing member (4) is moved in the width direction of the mushiro held suspended from the bifurcated rod-shaped part (3) of the mushiro holder (2). The casting tool according to claim 1, wherein the casting tool is pressed against the upper surface of the central portion. The holding member (4) is supported by the support (1) so that the base end of the support rod (5) can be moved up and down by being pivotally supported by the support (1),
Due to the rotational moment due to the weight of the holding member (4) and the support rod (5), the holding member (4) is suspended from the bifurcated rod-shaped portion (3) of the holding body (2) at the center portion in the width direction of the Mushiro. The casting tool according to claim 1, wherein the casting tool is pressed against the upper surface. Casting instrument according to claim 1, characterized in that it further comprises a trolley (7) on which the support (1) is mounted for moving the instrument. 2. The casting tool according to claim 1, wherein the heights of the holder (2) and the pressing member (4) can be adjusted by expanding and contracting the support (1). According to claim 1, further comprising a robot arm (17) for holding the support (1), and the position of the support (1) can be adjusted by operating the robot arm (17). casting tools. 2. The casting tool according to claim 1, wherein the holding member (4) has a protrusion (8) at its lower end that can bite into the mold. A casting method using the casting device (A) according to any one of claims 1 to 8, wherein the molten metal held in the ladle (B) is cast into a mold ( A casting method characterized by pouring the metal into C).
(i) A cylindrical or bag-shaped mushiro (x) is suspended and held by the bifurcated rod-shaped portion (3) of the mushiro holder (2) provided in the casting instrument (A). At that time, by inserting the bifurcated rod-shaped part (3) into the tube or bag of the mushiro (x), the central part of the mushiro in the width direction hangs down and is held by the bifurcated rod-shaped part (3), and the pressing member (4) is held down from above at the center part in the width direction of the mushiro where it hangs down.
(ii) By moving the casting tool (A), the Mushiro (x) held on the bifurcated rod-shaped part (3) of the Mushiro holder (2) in the state of (i) above is moved to the ladle (B). Position it above the pot mouth (b).
(iii) By sliding the Mushiro holder (2) horizontally with respect to the support (1), the bifurcated rod-shaped part (3) of the Mushiro holder (2) can be attached to the cylindrical or bag-shaped Mushiro (x). The mushiro (x) is placed on the pot spout (b) along the shape of the pot spout (b), and the pressing member (4) presses the widthwise center part of the mushiro from above.
(iv) By tilting the ladle (B), molten metal is poured into the mold (C) from the ladle mouth (b) while impurities are dammed up by the mushiro (x). In the step (i) above, one or more Mushiro (y) are stacked on top of the Mushiro (x) which is suspended and held by the bifurcated rod-shaped part (3) so that the center part in the width direction of the Mushiro hangs down. 10. The casting method according to claim 9, wherein the pressing member (4) presses the central part in the width direction of the mold from above. A method for producing a casting using the casting device (A) according to any one of claims 1 to 8, wherein the molten metal held in the ladle (B) is subjected to the following steps (i) to (iv). A method for manufacturing a casting, characterized by pouring the metal into a mold (C).
(i) A cylindrical or bag-shaped mushiro (x) is suspended and held by the bifurcated rod-shaped portion (3) of the mushiro holder (2) provided in the casting instrument (A). At that time, by inserting the bifurcated rod-shaped part (3) into the tube or bag of the mushiro (x), the central part of the mushiro in the width direction hangs down and is held by the bifurcated rod-shaped part (3), and the pressing member (4) is held down from above at the center part in the width direction of the mushiro where it hangs down.
(ii) By moving the casting tool (A), the Mushiro (x) held on the bifurcated rod-shaped part (3) of the Mushiro holder (2) in the state of (i) above is moved to the ladle (B). Position it above the pot mouth (b).
(iii) By sliding the Mushiro holder (2) horizontally with respect to the support (1), the bifurcated rod-shaped part (3) of the Mushiro holder (2) can be attached to the cylindrical or bag-shaped Mushiro (x). The mushiro (x) is placed on the pot spout (b) along the shape of the pot spout (b), and the pressing member (4) presses the widthwise center part of the mushiro from above.
(iv) By tilting the ladle (B), molten metal is poured into the mold (C) from the ladle mouth (b) while impurities are dammed up by the mushiro (x). In the step (i) above, one or more Mushiro (y) are stacked on top of the Mushiro (x) which is suspended and held by the bifurcated rod-shaped part (3) so that the center part in the width direction of the Mushiro hangs down. 12. The method of manufacturing a casting according to claim 11, wherein the pressing member (4) presses the central part of the mold in the width direction from above.

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