JPH0356790B2 - - Google Patents

Abstract

1. Taphole device for the casting of fused metallic or non-metallic materials comprising two cylinders (A, B) having parallel axes and one common contact line and being rotatable around their axes in opposite directions relative to each other, each of the cylinders (A, B) having one groove (10) with a varying cross section extending each along a part of the circumference of each cylinder and the cylinders being positioned in a face-to-face alignment, so that the two grooves (10) cooperate to form a symmetrical opening with respect to the line of contact of said cylinders, characterized in that it includes means for sealing the cylinders with respect to one another as well as attachment means (1 and 2) and sealing means with respect to the vessel containing the molten material.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a melt outlet mechanism primarily intended for the shaping of liquid materials, in particular molten metals or non-metallic materials. Further, the present invention relates to a variable aperture outlet or flow control device for starting, stopping and regulating the flow of material in a molding process.

[Conventional technology]

Known outlet mechanisms or nozzle devices in the metallurgical industry are constituted by traditional plug or slide closure devices. The principle of such a device is
The cross-sectional area of the orifice in a container containing molten metal is increased or decreased by removing or inserting objects, such as plugs or plates, between the orifice and the material to be cast.

[Problem to be solved by the invention]

Since the shape of the injection jet is necessarily influenced by changes in the shape of the orifice in devices using this principle, such devices do not function well except in fully open and fully closed positions. With respect to the opening in the intermediate state, the injection jet may scatter or change, which has a significant negative effect on the molding quality. Accordingly, there is a recognized need and utility for a well-functioning outlet mechanism or variable flow control device.

The same problems in metal casting are found in the non-metal-based glass or other material manufacturing industry, which involves molten materials and molding processes. An improved outlet mechanism is proposed in which the cross-sectional area of the orifice is varied by depositing a thicker or thinner layer of hardened material on the walls of the outlet channel by adjusting the temperature of the outlet channel. It was done. An example of such a device is the device described in Luxembourg patent no. 82177, which must be equipped with an electric heating device as well as a cooling device. Such devices have a fairly long response time when regulating flow and require periodic monitoring of thermal balance to maintain the desired flow jet. Furthermore,
At small aperture sizes, the jet shape becomes irregular due to sediment disturbances in the channel walls.

Therefore, an object of the present invention is to provide an outlet mechanism capable of starting the supply of molten material, accurately adjusting it, and stopping its discharge, and also capable of maintaining constant shape conditions at the output part of the outlet. To obtain a variable aperture flow control device.

[Means to solve the problem]

To achieve this objective, the device of the invention is provided with two cylinders whose axes are arranged parallel to each other. The cylinders are rotated about their respective axes and brought into line contact at a common line. At least one cylinder is provided with a partially circumferential groove. The other cylinder can also have a smooth circumferential surface. The groove is provided over a portion of the circumferential surface of the cylinder in a direction substantially orthogonal to the axis, and has a contour whose depth varies from zero to maximum. Preferably, both cylinders are provided with grooves of the same shape. Machining in the body of at least one cylinder, but preferably in the bodies of both cylinders, identically shaped grooves of suitable contours, the two cylinders being superimposed so that the apertures described by the contours of the grooves are symmetrical. By positioning the cylinders so that the cylinders have the same shape, the opening cross section changes when the cylinders are rotated in opposite directions, but the initial cross-sectional shape is always maintained (i.e., the cross-sectional shape does not change).
You can get the equipment.

In a preferred embodiment of the invention, the groove of each cylinder is constructed with a pseudo-elliptical profile. This configuration produces an orifice that is always circular in cross section and symmetrical about the line of line contact between the cylinders. However, simpler contours are also possible. However, it is costly to maintain continuity and uniformity of the jet while changing the orifice cross-sectional shape and the opening amount of the outlet.

Furthermore, the apparatus of the present invention is provided with means for driving the two cylinders synchronously in order to position the melt outlet so as to maintain the opening degree at a desired level. For this purpose, the two cylinders are provided with a gear or pinion device and a drive mechanism, which may also be a simple lever. Or, in more advanced applications, a servo motor can be provided that acts on one of the two cylinders. Furthermore, the device of the present invention is provided with pressing means for pressing the two cylinders against each other to bring them into line contact. This means can be, for example, a pressure screw. Furthermore, auxiliary sealing means between the two cylinders may be provided, for example by superimposing one cylinder on the other.

[Effect]

According to the present invention, it is possible to continuously change the outlet opening and accurately adjust the discharge amount. Any shape of outlet opening cross section can be maintained based on the shape of the groove. Moreover, with the pseudo-elliptical groove, it is possible to obtain a completely circular opening with a constant orifice axis.

〔Example〕

Next, preferred embodiments of the present invention will be described with reference to the drawings.

The flow control device according to the present invention has two cylinders A and B, and a quasi-elliptical groove 10 is provided on the circumferential surface of each cylinder in a direction perpendicular to the axis of the cylinder (see FIG. 1). That is, each groove 10 has a shape resembling an oval notch, saddle, or depression that extends circumferentially along a portion of the circumferential surface of the cylinder. In cylinders A and B, corresponding points on the circumferential edges of the grooves 10 of each cylinder are in line contact with each other on the line between the cylinder axes, so that the cross section of the groove intersection area is always circular, and the diameter of this circle is the diameter of the cylinder. varies based on the degree of rotation. Since the cylinder is used as an outlet mechanism, the orifice is formed by the groove 10, and the outlet is always circular, but the diameter of the circle changes when the groove parts come into contact. Due to these variations in the contours of the grooves 10 along the circumferential surface of the cylinder, the openings described by the overlapping groove contours change as the cylinder rotates in the direction indicated by the arrow. In this way, in the state shown in FIG. 1A, the depth of the groove becomes maximum at the line contact position between cylinders A and B, so that the maximum opening 01 is obtained. To create a smaller or smaller aperture, cylinders A and B are rotated in opposite directions, cylinder A clockwise and cylinder B counterclockwise, to create aperture 02. If this movement continues, the opening 03 will become smaller than that shown in Figure 1C, and eventually the cylinders will come into contact with each other in the grooveless part of the cylinders, and this outlet will be completely blocked as shown in Figure 1D. It becomes closed state. 1st
In Figure A-1D, the arrow indicates the direction of flow of the molten material through the outlet, which has a circular cross section when viewed from inside the container containing the molten material.

FIG. 2 shows a cylinder that is substantially the same as that shown in FIG. 1, but shows an embodiment in which the shape of the outlet groove is different. The outlet groove shown in FIG. 2 has a simple outline because the bottom surface has a linear shape as shown in FIGS. 2A, 2B, and 2C. However, as is clear from FIG. 2A, in this embodiment the aperture has a circular shape only in the positions where the bottom surfaces of the grooves are parallel to each other, and in other positions, for example in the position of FIG. 2B, the aperture has an elliptical profile. becomes. Similar to that shown in Figures 1A-1C, the arrows in Figures 2A, 2B and 2C indicate the direction of flow of the material to be cast or formed.

FIG. 3 shows an embodiment incorporating a mechanism according to the invention. Each of the cylinders A, B is provided with a pseudo-elliptical groove 10 such that the illustrated mutually interlocking grooves create a circular removal opening 0. Bearing block 3
acts as a support for the two cylinders A and B. The bearing block 3 is attached to the outer surface of the molten material container by means of attachment elements or mechanisms 1 and 2. The two cylinders A and B are synchronously rotated in opposite directions by a gear or pinion 5 on the drive shaft of each cylinder. The rotation mechanism (not shown) can be a lever, screw, or servo motor. A load-generating or pressure mechanism 4, which may be constituted, for example, by a pressure screw, brings the cylinders into intimate pressure contact with each other, so as to seal the cylinders except when and where the grooves 10 engage.

Forming of non-metallic molten materials For example, when manufacturing glass, inorganic wool or ceramic fiber using sand, slag, rock, etc., cylinders A and B
can be made of metal, and this mechanism is applied to the casting of liquid metals, for example in a steel casting ladle, or below the hearth of a steel electric or foundry furnace, or as a pan divider in continuous casting. -divider) or in the discharge part of the converter, the cylinder can be made of a heat-resistant material.

In the case of molding of non-metallic materials, it is advantageous to provide a metal cylinder of a water cooling system by providing a channel 6 for conducting cooling water.

The grooves are mirror images of each other, and when the cylinder is positioned so that the groove regions are opposed to each other, the cylinder and the groove are arranged relative to each other so that the corresponding portions are opposed to each other. Furthermore, when the grooves are in opposing relationship creating an outlet opening, the opening is symmetrical about the line of contact between the cylinders. This feature, in conjunction with the structure and features described above, provides a variable aperture outlet mechanism that solves or alleviates the aforementioned problems of prior mechanisms.

The above description merely describes preferred embodiments of the present invention, and it goes without saying that various modifications can be made within the scope of the claims.

[Brief explanation of drawings]

FIG. 1 is a perspective view of two cylinders each provided with a pseudo-elliptical groove, FIGS. 1A, 1B, 1C and 1D are cross-sectional views of the cylinder in FIG. 1 in different states, and FIG. 2A, 2B and 2C are respectively cross-sectional views of the cylinder of FIG. 2 in different states, and FIG. 3 is a perspective view of two cylinders each provided with a flat bottom groove; FIG. 1 is a cross-sectional view of an embodiment of the device; FIG. A, B...Cylinder, 10...Groove, 0,01,
02,03...Opening, 1,2...Mounting element or model (mounting means), 3...Bearing block, 4...
Load generation or pressure mechanism, 5...gear or pinion, 6...channel.

Claims (1)

[Scope of Claims] 1. Two cylinders A and B whose axes are parallel to each other, contact each other at one common contact line, and are rotatable in mutually opposite directions around the axes, and the cylinders A and B are each provided with a groove 10 varying in cross-section along a portion of their circumference, and both cylinders are aligned and opposed to each other so that the coordinated action of the two grooves 10 makes them symmetrical with respect to the common contact line. A variable opening flow rate control device arranged to produce a shaped opening, comprising inter-cylinder sealing means for sealing the one cylinder with respect to the other cylinder, mounting means 1 and 2 for attaching to a container containing a molten material, and a molten material. A variable opening flow rate control device comprising: sealing means for sealing against the container containing the material. 2. The variable opening flow rate control device according to claim 1, wherein the inter-cylinder sealing means is a pressure screw. 3. The variable opening flow rate control device according to claim 1 or 2, wherein the inter-cylinder sealing means is formed by an overlapping arrangement of the cylinders. 4. The variable opening flow rate control device according to claim 1, wherein the cylinder is made of a heat-resistant material. 5. The variable opening flow rate control device according to claim 1, wherein the cylinder is made of metal, and the cylinder is provided with a channel 6 connected to a cooling system. 6. Claims 1 to 5, wherein the two cylinders have a groove whose longitudinal section changes along the circumference, and the depth of the longitudinal section of the groove changes from zero to a maximum value. The variable opening flow rate control device according to any one of. 7. The variable opening flow rate control device according to claim 6, wherein the groove has a pseudo-elliptical contour.