EP0082173A1

EP0082173A1 - Multiple ingot mold for the vertical continuous casting of non ferrous metals.

Info

Publication number: EP0082173A1
Application number: EP82901970A
Authority: EP
Inventors: Kalman Dipl-Ing Banhidy
Original assignee: Individual
Current assignee: Individual
Priority date: 1981-06-29
Filing date: 1982-06-26
Publication date: 1983-06-29
Also published as: NO830679L; WO1983000108A1; DE3125508A1; DE3266796D1; EP0082173B1

Abstract

La lingotière multiple est constituée d'une part d'un cadre (1) en forme de boîte et fermé latéralement, qui constitue une chambre de pression hydraulique et sert à porter les différentes lingotières individuelles (5) et à leur amener l'eau et, d'autre part, de plusieurs lingotières individuelles (5) qui renferment chacune une chambre à eau (9) et comprennent chacune soit une fente d'éjection annulaire, soit une couronne (12) de trous d'éjection. La face supérieure du cadre (1) comprend autant d'ouvertures (7) qu'il y a de lingotières individuelles (5); ces ouvertures (7) conduisent l'eau de refroidissement du cadre (1) aux lingotières individuelles (5). Chaque lingotière individuelle (5) est munie à sa face inférieure d'ouvertures (13) d'amenée d'eau, qui correspondent aux ouverture (7) du cadre (1). Les ouvertures d'amenée d'eau du cadre (1) resp. des lingotières individuelles (5) sont choisies de façon que le cadre (1) comporte des couronnes de trous (7) et les lingotières individuelles (5) des fentes annulaires (13) ou vice-versa, ou que les deux comprennent des couronnes de trous. Lorsque les ouvertures d'amenée d'eau (13) des lingotières individuelles (5) sont en face des ouvertures d'amenée d'eau (7) du cadre (1), on pose sur le cadre (1) les lingotières individuelles (5), lesquelles sont pressées contre la face supérieure du cadre soit par leur propre poids, soit par une force supplémentaire. On établit ainsi une liaison entre l'intérieur du cadre (1) et les chambres d'eau (9) des lingotières individuelles (5) de sorte que le cadre (1) et les lingotières individuelles (5) forment une lingotière multiple complexe.The multiple ingot mold consists on the one hand of a box-shaped frame (1) closed laterally, which constitutes a hydraulic pressure chamber and is used to carry the various individual ingot molds (5) and to bring them water and , on the other hand, of several individual molds (5) which each contain a water chamber (9) and each comprise either an annular ejection slot, or a ring (12) of ejection holes. The upper face of the frame (1) comprises as many openings (7) as there are individual ingot molds (5); these openings (7) lead the cooling water from the frame (1) to the individual molds (5). Each individual ingot mold (5) is provided at its lower face with openings (13) for supplying water, which correspond to the openings (7) of the frame (1). The water intake openings of the frame (1) resp. individual molds (5) are chosen so that the frame (1) has crowns of holes (7) and the individual molds (5) of annular slots (13) or vice versa, or that both comprise crowns of holes. When the water supply openings (13) of the individual ingot molds (5) are opposite the water supply openings (7) of the frame (1), the individual ingot molds are placed on the frame (1) 5), which are pressed against the upper face of the frame either by their own weight or by additional force. A connection is thus established between the interior of the frame (1) and the water chambers (9) of the individual ingot molds (5) so that the frame (1) and the individual ingot molds (5) form a complex multiple ingot mold.

Description

MULTIPLE CHOCOLATE FOR VERTICAL STRANGGI EATING NON-METALS

The invention relates to a multiple mold for vertical continuous casting of non-ferrous metals, which consists of a mold frame simultaneously serving the Künl water supply and several individual molds, which in turn have an integrated water chamber and an annular Soritz gap or a spray hole ring.

Multiple molds which have a coherent, common water chamber ("multiple block mold") and those in which single molds sprinkled from the outside are used (International Metals Reviews, London / Metals Park, June 1976, vol. 21, p. 84, Fig. 14 / a, c and d and DE-PS 1,758,574) are not the subject of the invention.

It is known that the continuous casting mold having an integrated water chamber is superior to the mold sprinkled from the outside. Because it has a precisely defined and directed water outlet opening - annular gap or ring of holes - this so-called gap or ring of chill mold can fulfill its task, namely the uniform cooling of the strand, better than the mold sprinkled from the outside. The externally sprinkled continuous casting mold is more sensitive to pressure fluctuations in the water supply network than the split or perforated ring mold and cannot produce a similarly uniform and intact water curtain as, for example, a well-designed split mold. Nevertheless, the mold sprinkled from the outside has become more and more important as a component of a multiple mold in recent times because it is much simpler and cheaper than the split or perforated ring mold, and because the format change can be carried out quickly and easily with replaceable mold sleeves , which is very important in modern large systems. If a conventional continuous casting mold having an integrated water chamber is used as a component of a multiple mold, a mold frame on which the individual molds are firmly mounted is used according to the prior art. The mold frame, which also serves to supply the cooling water, is designed as a water pressure chamber to which each individual mold is connected by one or more lines. The resulting conventional multiple mold in this way is merely a combination of individual molds, in which the good water distribution within each mold must be ensured individually.

The main difficulty in the construction of a continuous casting mold having an integrated water chamber is that the cooling water introduced laterally into the mold through only one or a few lines must be distributed within the mold chamber in such a way that the mold wall is cooled uniformly along its circumference on the one hand, and on the other hand the cooling water flows down in the direction of movement of the strand with the exclusion of any significant transverse movement along the surface of the strand.

Numerous mold designs with an integrated water chamber have become known (International Metals Reviews, London / Metals Park, June 1975, vol. 21, p. 84, fig. 14 / e to i, Hermann, E .: Handbook of Continuous Casting, Aluminum Verlag Düsseldorf , 1958, p. 205, pictures 664 to 656, p. 485, picture 1588, US-PS 3,565.9S9, US-PS 3,633,334 and US-PS 3,739,837). They all have various flow-dynamic calming elements such as sieve plates, sieve rings, collar-like weirs etc., which have the task of reducing the cooling water introduced laterally into the mold at one or a few points by reducing and compensating the flow velocities and redirecting the water flow into a uniform one To convert cross-flow free spray of water, these known mold designs are complicated, expensive, require a lot of space and can only be cleaned with great effort. Another disadvantage of the known multiple molds n is that their individual molds, since they are attached to the mold frame, are not displaced and / or lifted when the start-up floors are brought together with the molds, which results in damage to the inaccurate placement of the start-up floors on the lowering table sensitive bottom edges of the mold. When changing the format, not only the fastening elements of the individual molds, but also their cooling water connections have to be loosened.

The invention has for its object to provide a multiple mold of the type described, which never lacks the known multiple molds, i.e. It is simple and inexpensive to manufacture, enables a quick change of format, takes up little space, is easy to clean and, above all, ensures uniform mold wall cooling and a perfect splash water curtain free of cross currents. In the multiple mold according to the invention, it should also be possible to move and / or lift the individual molds on the mold frame.

This object is achieved according to the invention in that on the upper side of the laterally closed, box-shaped mold frame a number of annular molds or perforated rings corresponding to the number of individual molds is formed, and in that the individual molds, which also have a perforated ring on their lower side, or have an annular slot which runs exactly like the openings (slots or ring of holes) in the mold frame, in a position in which the openings of the individual molders. Opposite the openings of the Kokillenraiimens, placed on the Kokillenrahmen u n d are pressed by their own weight or by additional pressure on the upper side of the Kokillenframes.

The multiple mold according to the invention thus consists of a box-shaped, laterally closed mold wire, which is designed as a water pressure chamber and the holder and water supply line for the individual molds, as well as from several individual molds, which in turn have an integrated water chamber and either an annular spray gap or a spray hole rim. To transfer the cooling water in front of the mold frame into the individual molds, as many openings are formed on the upper side of the mold frame as the multiple mold must accommodate on individual molds. The individual molds in turn have water inlet openings arranged on the lower side of the openings of the mold frame. In a position in which the openings of the individual molds lie opposite the openings of the mold frame, the individual molds are placed on the mold frame and pressed against the upper side of the mold frame by their own weight or also by additional contact pressure. This creates a connection between the water pressure chamber of the mold frame and the water chambers of the individual molds, and a complex multiple mold is formed from the mold frame and the individual molds.

The water transfer openings of the mold frame or the individual molds are selected so that either the mold frame has annular slots and the individual molds have perforated rings or vice versa, or both have perforated rings.

If the openings of the mold frame are designed as annular slots, the individual molds can either have an annular spray gap or a spray hole rim (see claim 1). If, however, the openings of the mold frame are designed in the form of perforated rings, the individual molds can only have one spray hole ring as the water outlet opening (see claim 2). This design enables the formation of single molds from a single piece in a casting process.

If both the mold frame and the individual molds have perforated rings, the holes in the perforated rings of both parts are arranged in the same way, so when the single mold is placed on it len on the mold frame Locn over hole (see claim 3) This version is suitable for rectangular molds, in which a rotation of the mold on the mold frame is not possible.

Common to all of these embodiments of the invention is the presence of an annular, sieve-like vertical row of holes (ring of holes) - which can also be designed as a double row of holes with staggered holes or as an annular hole array - between the mold frame and each individual mold. The cooling water, the pressure inside the mold frame is largely reduced and compensated for on the way to the rows of holes arranged at the top in relation to the mold frame, now rises through the vertical rows of holes into the water chambers of the individual beds lying on the mold frame at a uniform speed all around. Here it undergoes a final, fine pressure equalization, and it is directed to the water outlet openings (ring-shaped spray gaps or perforated rings) of the individual molds.

When leaving the individual molds, the cooling water rinses the outer wall of the molds, then the surface of the solidified ingots emerging from the molds.

The annular water chamber of the individual molds, in contrast to the known continuous casting molds, is rather low in the multiple mold according to the invention, since it has practically only the task here of transferring the cooling water from the mold frame to the water outlet openings of the mold in the shortest possible way. With this cooling water supply, the occurrence of cross-flow in the water chamber or even in the splash water curtain of the individual molds is excluded, because the flow lines, starting from the closely spaced vertical transfer holes of the sieve-like row of holes, are of the same length and naturally only occur in vertical planes. According to the invention, the water transfer openings (ring-shaped slots or ring of holes) of the mold frame or the individual molds are preferably of different widths, so that the full water transfer cross section is retained even when the individual molds are moved or inaccurately placed.

In order to prevent excessive cooling of the ingot corner areas, the water transfer openings of the mold frame and the individual molds can be interrupted according to the invention in the corner regions of a rectangular individual mold.

To position the individual molds on the mold frame and to limit their displacement, a shallow depression can be formed on the upper side of the mold frame for each individual mold, the contour of which runs parallel to the outline of the individual molds and whose circumference is equal to or greater than the extent of Individual molds, the play of the individual molds in the shallow depressions being smaller than the play between the water transfer openings in the mold frame or in the individual molds. These recesses serve as seats for the individual molds. By playing a single mold in a shallow depression, the degree of mold displacement can be determined or the displacement can be prevented.

According to the invention, the individual molds can be placed on the mold frame either without or with interposition of seals. If no seals are used, leakage water can escape at the connection points. To collect this leakage water, a ring-shaped groove can be formed according to the invention on the side wall of each recess, from which the leakage water is widened into the casting pit by vertical drainage tubes extending from the groove and fastened in the mold frame.

In the event that the dead weight of the individual molds is not sufficient to hold them on the mold frame, according to the invention, they are pressed against the upper side of the mold frame by spring-loaded pressure elements arranged on the metal distributor. When the metal 1 distributor 1 is lifted off the mold frame, the individual molds are again loosely on the mold frame and can be checked, cleaned or replaced.

If a fixed mounting of the individual molds is preferred, they can be clamped to the mold frame according to the invention by clamping elements arranged on the mold frame.

The invention is explained on the basis of the exemplary embodiments depicted in the figures, and specifically shows

1 is a vertical section of a section of the Mehrfachko kille according to claim 1 with movable spray gap individual molds, including the corresponding section of the distribution channel with spring-loaded pressure elements and drainage tubes in the mold frame,

2 is a bottom view of a round injection gap single mold,

3 is a vertical section of a spray-hole ring Einzelko kille, which is ready to be used in the device in Fig. 4,

4 shows a vertical section of a section of the multiple mold according to claim 1 with spray-hole ring individual molds, including finally drainage pipes in the mold frame, the individual mold removed in the middle,

5 shows a vertical section of a section of the multiple mold according to claim 2, including seals between the mold frame and the individual molds and tensioning elements on the mold frame, Fig. 6 is a vertical section of a section of the multiple mold according to claim 3 with spray gap single molds and drainage pipes and

Fig. 7 is a bottom view of a rectangular injection gap single mold.

The mold frame 1 is designed as a box-shaped water pressure chamber which has openings 2, 4 or 5 which are designed in accordance with the cross section of the individual molds and is laterally closed.

On the upper side of the mold frame 1, 3, 4 or 5 water transfer openings are formed for the water supply of the individual molds, which are either annular slots 6 or perforated rings 7. To accommodate the individual molds 3, 4 or 5, the upper side 16 of the mold frame 1 has shallow depressions 8. If the circumference of the depression 8 is greater than the extent of the individual molds 3, 4 or 5 (FIG. 1), the individual mold 3, 4 or 5 can accordingly be displaced in the recess 8. If, however, no play is provided for the single mold 3, 4 or 5, it sits in the recess 8 without displacement (FIGS. 4, 5 and 6).

The single mold 3 is designed as a two-part injection gap mold. It has an integrated, low water chamber 9, on its lower side 15 a ring of holes 10 as a water inlet opening and an oblique, annular spray gap 11 as a water outlet opening. The mold parts 3a and 3b are screwed together (the screws are only indicated by their center lines).

The single mold 4 is designed as a two-part spray hole ring mold. It also has an integrated, low water chamber 9, on its lower side 15 a perforated rim 10 as a water inlet opening and an oblique spray hole wreath 12 as a water outlet opening. The mold parts

4a and 4b are also screwed together (the screws are only indicated by their center lines).

The single mold 5 is a one-piece spray hole ring mold. Your integrated, low water chamber 9 is formed in the casting process and opens down into an annular slot 13 as a water inlet opening. It also has an oblique spray hole rim 12 as a water outlet opening.

The annular slots 6 and perforated rings 7 of the mold frame 1, the perforated rings 10 of the individual molds 3 or 4 and the annular slot 13 of the individual mold 5 can be interrupted in the corner areas of a rectangular single mold 14 in order to prevent excessive cooling of the ingot corner areas ( Fig 7).

If the individual molds 3, 4 or 5 are placed on the mold frame 1 without the interposition of seals 24, an annular groove 18 is formed on the side wall 17 of the depression 8 to catch the small amount of leakage water. The leakage water is drained from the groove 18 into the casting pit through the drainage pipes 19 fastened in the mold frame 1.

In the normal case, the dead weight of the individual molds 3, 4 or 5 is sufficient to hold them on the mold frame 1, because the cooling water pressure is very low at the water transfer points, but if the individual molds 3, 4 or 5 are seated with a play in the recesses 8 (Fig. 1) , it is advisable to press it onto the upper side of the 16 mold frame for the time of pouring. For this spring-loaded pressure elements 20 are provided, which are attached to the distribution channel 22. The claws 21 of the pressure elements 20 hold the individual molds 3, 4 or 5 in place during the casting process. At the end of the casting, the distributor channel 22 is lifted from the mold tube 1, and the individual molds 3, 4 or 5 are again loosely in the depressions 8. 5 seals 24 are inserted between the connection surfaces 15 and 16 of the individual molds 3, 4 or 5, or the mold frame 1, which are preferably located in grooves in the mold frame 1. The individual molds 3, 4 or 5 are clamped here simultaneously on the mold frame 1 by claws 21 and nuts 23.

The multiple mold according to the invention combines the advantages of the known slotted or perforated ring molds and the known molds sprinkled from the outside without having their disadvantages, and also offers further advantages.

Individual molds of different formats can now be used in a single mold frame without the cooling of the mold used in each case deteriorating. The individual molds of various formats always have the same size and the same water inlet opening. They differ only in their clear cross-section and thus in the width of their ring-shaped water chamber. Regardless of their cross-section, they always have a precisely defined and directed water outlet opening that is adapted to the cross-section, namely a spray gap or a spray hole rim. Due to the special water supply, the water inside the mold frame and each individual mold is optimal, and because of this all bars can be cooled evenly.

The format change can be carried out quickly and easily. The single mold used up to that point is simply removed from its seat, and a single mold of another format is inserted into the seat.

The construction of both the mold frame and the individual molds is simple. The individual molds consist of at most two simple parts, are inexpensive to manufacture, easy to clean and require little space. The field of application of the multiple mold according to the invention is of course not limited to conventional continuous casting with nozzles and floats. It can also be used as a component of multiple hot-head molds (hot-top process) or as a cooling device for multiple electromagnetic continuous casting molds.

The scope of the invention also extends to the borderline case in which the mold frame accommodates only a single individual mold.

Publications considered:

International Metals Reviews, London / Metals Park, June 1976, vol. 21, p. 84, Fig. 14

Hermann, E.: Handbook of Continuous Casting, Aluminum-Verlag Düsseldorf, 1958, p. 205, pictures 664 to 655, p. 485, picture 1588

DE-PS 1,758,574

U.S. Patent 3,665,999

U.S. Patent 3,688,834

U.S. Patent 3,739,837

With 3 sheets of drawings

Claims

EXPECTATIONS:

1.Multiple mold for vertical continuous casting of non-ferrous metals, consisting of a mold frame which also serves for the supply of cooling water and several individual molds, which in turn have an integrated water chamber and an annular spray gap or a spray hole rim, characterized in that on the upper side 16 of the laterally closed, kastenförmi gene Kokil0enrahmens 1 one of the number of individual molds 3 or 4 corresponding number of annular slots 6 is formed, and that the individual molds 3 or 4, which have on their lower side 15 a rim 10, which runs exactly like the slots 6, the The width of the perforated ring 10 is preferably smaller than the width of the slots 5, in a position in which the perforated rings 10 lie opposite the slots 6, placed on the mold frame 1 and by their own weight or also by additional pressing force on the upper side 16 of the mold frame 1 be pressed.

2. Multiple mold for vertical continuous casting of non-ferrous metal n, consisting of a mold frame simultaneously serving the cooling water supply and several individual molds, which in turn have an integrated water chamber and a spray hole rim, characterized in that on the upper side 16 of the laterally closed, box-shaped Chill mold frame 1 has a number of perforated rings 7 corresponding to the number of individual molds 5, and wet the individual molds 5, which have an annular slot 13 on their lower side 15, which runs exactly like the perforated rings 7, the width of the slot 13 preferably being greater than the width of the perforated rings 7, in a position in which the slots 13 lie opposite the perforated rings 7, are placed on the mold frame 1 and are pressed against the egg side 16 of the mold frame 1 by their own weight or also by additional contact pressure.

3. Multiple mold for vertical continuous casting of non-ferrous metals, consisting of a mold frame simultaneously serving the cooling water supply and several individual molds, which in turn have an integrated water chamber and an annular spray gap or a spray hole rim, characterized in that on the upper side 16 of the laterally closed, box-shaped gene Chill mold frame 1 is a number of perforated rings 1 corresponding to the number of individual molds 3 or 4, and that the individual molds 3 or 4, which also have a perforated ring 10 on their lower side 15, in which the number and arrangement of the holes are exactly the same, their size However, it is preferably different as in the case of the perforated rings 7, in a position in which the holes in the perforated rings 10 lie opposite the holes in the perforated rings 1, placed on the mold frame 1 and by their own weight or also by additional contact pressure on the upper side 16 of the K ocillary frame 1 are pressed.

4. Multiple mold according to claim 1, 2 or 3, characterized in that the annular slots 6, or ring wreaths 7 of the mold frame 1, the ring wreaths 10 of the individual molds 3, or 4 and the annular slot 13 of the individual mold 5 in the corner areas a rectangular single mold 14 are interrupted.

5. Multiple mold according to claim 1, 2, 3 or 4, characterized in that on the upper side 16 of the mold frame 1 for positioning the individual molds 3, 4 or 5 on the mold frame 1 for each individual mold 3, 4 or 5, a shallow depression 8 is formed, the contour of which is parallel to the outline of the individual molds 3, 4 or 5 and whose circumference is equal to or greater than the extent of the individual molds 3, 4 or 5, the play of the individual molds 3, 4 or 5 in the shallow depressions 3 is smaller than the play between the water transfer openings, ie slots or perforated rings in the mold frame 1, or in the individual molds. 3, 4 or 5.

6. Multiple mold according to claim 5, characterized in that for collecting the at the connection points of the individual molds 3, 4 or 5 to the mold frame 1 leaking water on the side wall 17 of each recess 8 an annular groove 18 is formed, from which the leakage water through from the groove 18 and in the Kokillenrah men 1 attached vertical drainage pipe 19 is derived into the casting pit.

7. Multiple mold according to claim 1, 2, 3, 4 or 5, characterized gekennzei chnet that between the r lower side 15 of a single mold 3, 4 or 5 and the upper side 16 of the mold frame 1 seals 24 are used to prevent water filtration .

8. Multiple mold according to claim 1, 2, 3, 4, 5, 6 or 7, characterized in that the additional contact pressure on the metal 1 distributor 22 ensure spring-loaded pressure elements 20 which separate the individual molds 3, 4 or 5 to the upper side Press on 16 of the mold frame 1.

9. Multiple mold according to claim 1, 2, 3, 4, 5, 6, 7 or 8, characterized in that the additional contact pressure on the mold frame 1 arranged clamping elements 21 and 23 ensure that the individual molds 3, 4 or 5 clamp on the mold frame 1 .