DE202020003088U1 - Cold strand head, system with such a cold strand head - Google Patents

Abstract

Cold strand head (45) for the production of thin slabs for a continuous caster (10) with a first connecting device (50) for a form-fitting connection (47) with a hot strand (30),
- wherein the first connecting device (50) has a carrier section (95) which is plate-shaped and has a first side surface (100) and a first end face (135),
- wherein the first connecting device (50) is formed on a second end face (180) of a connecting section (80) of the cold strand head (45),
- wherein the first side surface (100) is formed on a side of the carrier section (95) facing the second end face (180) of the connecting section (80),
- wherein the carrier section (95) is formed at least in sections along the second end face (180) of the connection section (80) and protrudes along an axis (x) from the second end face (180) of the connection section (80),
- wherein at least one first connecting element (110) is formed on the first side surface (100) of the carrier section (95) and protrudes from the first side surface (100),
- wherein the first connecting element (110) has a first transverse bulge (125) and a first longitudinal bulge (130) connected to the first transverse bulge (125),
- wherein the first transverse bulge (125) extends inclined to the axis (x) and protrudes laterally beyond the first longitudinal bulge (130),
- wherein the first longitudinal bulge (130) extends into the second end face (180) of the connecting section (80),
- wherein the first transverse bulge (125) is formed, at least in sections the hot strand (30) to reach behind to form the form-fitting connection (47),
- characterized in that the first side surface (100) has a recess (225, 227) between the first transverse bulge (125) and the second end face (180).

Description

The invention relates to a cold strand head according to claim 1 and a system according to claim 13.

Out AT 517 976 A a casting device of a continuous caster is known.

Out JP S48 32902 Y1 a cold strand head for a continuous casting plant is known. The cold strand head has a high structure. If the cold strand head is used to manufacture thin slabs, the cold strand head tears out on the hot strand. Furthermore, the cold strand head is not suitable for producing thin slabs with a thickness of less than 18 cm.

It is the object of the invention to provide an improved cold strand head with a particularly short set-up time and an improved system for producing thin slabs.

This object is achieved by means of a cold strand head according to claim 1 and a system according to claim 13. Advantageous embodiments are specified in the dependent claims.

It was recognized that an improved cold strand head with a particularly short set-up time for the production of thin slabs can be provided in that the cold strand head has a first connection device for a positive connection with a hot strand. The first connecting device has a carrier section which is plate-shaped and has a first side face and a first end face. The first connecting device is formed on a second end face of a connecting section of the cold strand head. The first side surface is arranged on a side of the carrier section facing the second end face of the connecting section. The carrier section is formed at least in sections along the second end face of the connection section and protrudes along an axis from the second end face of the connection section. At least one first connecting element is formed on the first side surface of the carrier section and protrudes from the first side surface. The first connecting element has a first transverse bulge and a first longitudinal bulge connected to the first transverse bulge. The first transverse bulge extends at an incline to the axis and protrudes laterally beyond the first longitudinal bulge, the first longitudinal bulge extending into the second end face of the connecting section. The first transverse bulge is designed to engage behind the hot strand at least in sections to form the form-fitting connection. The first side face has a depression between the first transverse bulge and the second end face.

This configuration has the advantage that no additional connecting elements have to be cast into the hot strand, so that, on the one hand, the set-up time when closing the mold outlet of a permanent casting plant using the cold strand head is particularly short and, on the other hand, the cold strand head is particularly inexpensive.

A particularly good hold of the hot strand on the cold strand head can be ensured by the recess. Tearing out the cold strand head on the hot strand can be avoided by the depression. Due to its flat design and the recess, the cold strand head is particularly suitable for the production of thin slabs. A thin slab is understood to mean a slab that is not thicker than 18 cm. It is particularly advantageous if the thin slab is from 4 cm to 12.5 cm, particularly advantageously 8 cm to 12 cm, thick. The thin slab can be rolled into thin sheets particularly well.

Furthermore, by means of the first longitudinal section, a particularly high tensile force can be transmitted between the first transverse bulge and the connecting section, since the first longitudinal bulge prevents the first connecting device from bending open. The depression can also be designed to be particularly deep due to the first longitudinal bulge and the force support via the first longitudinal bulge, so that the cold strand head has a particularly low material thickness at the depression.

The first connecting device is particularly rigid due to the carrier section. Furthermore, when casting the thin slab in the continuous caster, an undercut on the thin slab is avoided. Furthermore, only slight stresses develop on the thin slab when the slab cools, so that the thin slab has a particularly good structure. Furthermore, a good demolding of the cold strand head from the thin slab is ensured by the carrier section.

In a further embodiment, the depression directly adjoins the first longitudinal bulge in a direction perpendicular to the axis, the first longitudinal bulge and the depression merging into one another in a stepless manner. This configuration is particularly favorable in terms of voltage. Furthermore, the cold strand head can be particularly easily removed from the mold from the hot strand.

In a further embodiment, the first side surface is planar in a partial area formed, wherein the partial area adjoins the first end face along the axis and adjoins the first transverse bulge and the depression in a direction perpendicular to the axis. As a result, mechanical stresses in the cold strand head when demolding from the hot strand can be kept low. Furthermore, the carrier section is particularly rigid and tensile strength as a result.

In a further embodiment, at least one second connecting element protrudes from the first side surface of the carrier section. The second connecting element has a second transverse bulge and a second longitudinal bulge connected to the second transverse bulge, the second transverse bulge extending inclined to the axis and laterally projecting beyond the second longitudinal bulge. The second longitudinal bulge extends into the second end face, with a recess being arranged in a direction perpendicular to the axis between the first connecting element and the second connecting element, which recess is delimited by the first side surface. The recess extends along the axis between the first end face and the second end face. It is particularly advantageous here if the first connecting element and the second connecting element are designed to be identical to one another. Furthermore, the cold strand head is designed to be particularly flat and offers high rigidity despite the flat design.

The recess is used to hold liquid metal for forming the second connecting device of the hot strand. The recess, which is open towards the first end face, ensures that the liquid metal flows in well. The recess can for example be T-shaped. This configuration allows a high level of force to be transmitted between the cold strand head and the hot strand. Through the recess, in particular thin slabs can be continuously cast and drawn through the cold strand head.

A particularly high power transmission between the hot strand and the cold strand head in the production of thin slabs can be provided if the first side surface between the second transverse bulge and the second end face also has a further recess, which is preferably formed steplessly to the second transverse bulge and the second end face. The further recess can be rounded, in particular curved. Due to the further recess, the one area for power transmission is particularly large.

In a further embodiment, the partial area adjoins the second transverse bulge and the further depression in the direction perpendicular to the axis. The arrangement of the partial area between the two depressions ensures good force transmission between the cold strand head and a strand of the hot strand that is subsequently cast. Furthermore, a low-stress cooling of the hot strand in the area of the cold strand head is ensured.
It is particularly advantageous if the first transverse bulge and the second transverse bulge are arranged on a common straight line. This avoids tilting of the two transverse bulges on the hot strand when the positive connection is released.

In a further embodiment, the carrier section extends over at least 80 percent of a maximum width of the second end face of the connecting section. As a result, an undercut on the carrier section can be avoided, so that a non-destructive release of the form-fitting connection is ensured.

In order to prevent back-casting of the first connecting element, the carrier section protrudes laterally, at least in sections, preferably circumferentially over the first transverse bulge.

In terms of tension, it is favorable for demolding the form-fitting connection if the carrier section is designed to taper along the axis, starting from the second end face towards the first end face of the carrier section. The carrier section can be trapezoidal. The tapering can take place in the direction perpendicular to the axis. In a further direction perpendicular to the axis, the carrier section can have an essentially constant thickness, with the exception of the region of the depression. As a result, a torque to be introduced into the second end face can be kept low.

In a further embodiment, the first transverse bulge has at least one first holding surface. The first holding surface is arranged on a side facing the second end face of the cold strand head and adjoins the first side surface in sections. The first holding surface forms an obtuse angle with the first side surface. As a result, when the positive connection is released by means of a rotary movement, low-wear sliding of the two connecting devices against one another is ensured. The first holding surface and the recess adjoin one another steplessly. The depression can be designed in an arc shape. As a result, the surfaces of the connecting elements each have a particularly large surface. As a result, the tensile force acting on the connecting device can be transmitted particularly well to the hot strand.

In a further embodiment, the first transverse bulge and the first longitudinal bulge are T-shaped or L-shaped or Y-shaped to one another.

In a further embodiment, the first transverse bulge is designed to run directly adjacent along the first end face. As a result, damage, in particular bending, of the carrier section when the first connecting device is released from the second connecting device can be avoided.

It is particularly advantageous if the carrier section has a first maximum thickness perpendicular to the axis and the connecting section has a second maximum thickness on the second end face, a first thickness ratio of the first thickness to the second thickness of 1:20 up to and including 1: 3 in particular from 1: 9 up to and including 1: 3, particularly advantageously from 1: 9 up to and including 1: 6 inclusive. These value ranges are particularly suitable for producing thin slabs.

Particularly for the production of thin slabs, it has been found that it is advantageous if the first connecting device has a third maximum thickness perpendicular to the axis and the connecting section has a second maximum thickness, with a second thickness ratio of the third thickness to the second thickness of inclusive 1: 6 up to and including 1: 1, in particular from 1: 3 up to and including 1: 1 inclusive, particularly advantageously from 1: 1.5 up to and including 1: 1.1 inclusive, the second thickness preferably being greater than the third thickness. These value ranges are particularly suitable for producing thin slabs with the cold strand head.

A system has a hot strand and a cold strand head, the cold strand head being designed as described above. The hot strand has at least one second connecting device. The first connecting device and the second connecting device engage in one another to form the positive-locking connection, which is preferably releasable in a non-destructive manner.

To produce the hot strand, in particular thin slabs, the above-described cold strand head and a continuous caster are provided. The cold strand head closes a mold outlet of the mold with the connecting section and the carrier section. A metallic melt is arranged in the mold, and the metallic melt surrounds the first connecting element. The metallic melt is cooled to form the hot strand, in particular the thin slab, and forms a second connection device which is positively locked with the first connection device. The cold strand head is pulled out of the mold outlet and the cold strand head pulls the hot strand via the positive connection. The first connecting device is removed as a whole from the second connecting device in order to release the form-fitting connection between the first connecting device and the second connecting device.

This means that no further time-consuming steps are necessary to separate the cold strand head from the hot strand. This further reduces the risk of injury in the continuous caster. The separation of the form-fitting connection between the cold strand and the hot strand can also take place in a partially or fully automated manner.

In a further embodiment, in order to release the positive connection, the cold strand head is guided in a rotary movement about an axis of rotation to the hot strand and the engagement of the first connecting device and the second connecting device in one another is canceled, the axis of rotation running parallel to the second end face. The rotary movement is synchronized with a transport speed of the hot strand. This avoids tensioning of the cold strand head or unwanted entrainment of the cold strand head by the hot strand being conveyed on. Alternatively or additionally, to release the form-fitting connection, the cold strand head to the hot strand and / or the hot strand to the cold strand head is / are removed from one another in a movement in a direction inclined to the first side surface, so that the engagement of the first connecting device in the second connecting device is canceled . The movement can take place in a straight line and preferably perpendicular to the first side surface. The movement can result in a tilting movement of the cold strand head about the axis of rotation.

• 1 eine schematische Darstellung einer Stranggießanlage;
• 2 eine perspektivische Darstellung eines Kaltstrangkopfs gemäß einer ersten Ausführungsform der in 1 gezeigten Stranggießanlage;
• 3 einen in 2 markierten Ausschnitt A des in 2 gezeigten Kaltstrangkopfs;
• 4 eine Rückansicht auf den Kaltstrangkopf;
• 5 einen Ausschnitt einer Schnittansicht entlang einer in 3 gezeigten Schnittebene A-A durch den in 3 gezeigten Kaltstrangkopf;
• 6 eine Schnittansicht entlang einer in 3 gezeigten Schnittebene B-B durch den in 3 gezeigten Kaltstrangkopf;
• 7 eine Schnittansicht entlang einer in 3 gezeigten Schnittebene C-C durch den in 3 gezeigten Kaltstrangkopf;
• 8 einen in 2 markierten Ausschnitt B des in 2 gezeigten Kaltstrangkopfs 45;
• 9 einen Ausschnitt einer perspektivischen Darstellung eines Warmstrangs;
• 10 eine Schnittansicht entlang der in 3 gezeigten Schnittebene C-C durch ein System mit dem in 3 gezeigten Kaltstrangkopf;
• 11 eine perspektivische Schnittansicht entlang der in 3 gezeigten Schnittebene C-C durch das in 10 gezeigte System;
• 12 bis 19 jeweils einen Ausschnitt einer Draufsicht auf einen Kaltstrangkopf gemäß einer zweiten bis achten Ausführungsform.

The invention is explained in more detail below with reference to FIGN. Show:

• 1 a schematic representation of a continuous caster;
• 2 a perspective view of a cold strand head according to a first embodiment of FIG 1 continuous caster shown;
• 3 one in 2 marked section A of the in 2 cold strand head shown;
• 4th a rear view of the cold strand head;
• 5 a detail of a sectional view along an in 3 Section plane AA shown through the in 3 cold strand head shown;
• 6th a sectional view along an in 3 Section plane BB shown through the in 3 cold strand head shown;
• 7th a sectional view along an in 3 Section plane CC shown through the in 3 cold strand head shown;
• 8th one in 2 marked section B of the in 2 cold strand head shown 45 ;
• 9 a section of a perspective view of a hot strand;
• 10 a sectional view along the in 3 section plane CC shown by a system with the in 3 cold strand head shown;
• 11 a perspective sectional view along the in 3 Section plane CC shown through the in 10 system shown;
• 12 to 19th each a section of a top view of a cold strand head according to a second to eighth embodiment.

The continuous caster 10 includes a mold 15th , a strand guide 20th , a sprue device 25th and a separator 70 .

The pouring device 25th has a cold strand head 45 and one on the cold strand head 45 attached link chain 75 on. The link chain 75 is in 1 not shown. Further components of the continuous caster 10 such as a ladle or a distributor for filling the mold 15th are in 1 not shown.

For forming a hot strand 30th , especially a thin slab 35 , becomes a metallic melt 40 , for example a steel melt, into the mold 15th promoted and the mold 15th filled. On the underside of a mold exit 41 the mold 15th the mold is through the cold strand head 45 closed when pouring on. On one of the mold exit 41 remote side is the link chain 75 on the cold strand head 45 attached.

The metallic melt 40 flows around a first connecting device 50 of the cold strand head 45 , wherein on the first connecting device 50 is discussed in detail in the following FIGN.

The mold 15th is cooled so that in the mold 15th solidification of the metallic melt 40 begins. With solidification of the metallic melt 40 becomes the hot strand 30th , especially the thin slab 35 , shaped. When the metallic melt solidifies 40 forms the hot strand 30th at the first connector 50 in turn, according to the shape of the first connecting device 50 one corresponding to the first connecting device 50 trained second connecting device 55 on the front. The second connecting device 55 is form-fitting with the first connecting device 50 connected. On the second connecting device 55 is in the 9 and 10 received in detail.

The cold strand head 45 is made by means of the link chain 75 from the mold exit 41 away in the strand guide 20th drawn. The hot strand 30th becomes from the mold 15th through the mold exit 41 to the strand guide 20th promoted. The hot strand 30th is through the strand guide 20th transported and further cooled by means of secondary cooling, not shown. The first and second connecting devices are located here 50 , 55 engaged so that the cold strand head 45 the hot strand 30th pulls.

2 shows a perspective view of the cold strand head 45 .

To facilitate understanding of the cold strand head 45 is in the 2 to 9 to a (local) coordinate system of the cold strand head 45 Referenced. The coordinate system of the cold strand head 45 has an x-axis, a y-axis - (first transverse direction perpendicular to the x-axis) and a z-axis (second transverse direction perpendicular to the x-axis and perpendicular to the first transverse direction). The coordinate system is designed as a legal system, for example. In 2 is the cold strand head 45 standing like him in the mold exit 41 is aligned, shown.

The x-axis of the cold strand head 45 overlaps with a direction of movement with which the cold strand head 45 and / or the solidifying melt 40 in the mold 15th towards the mold exit 65 is led out.

The cold strand head 45 has next to the first connecting device 50 a connecting section 80 and a third connector 90 on. In addition, the cold strand head 45 at least one faceplate 91 exhibit.

The first connector 50 has a support section 95 on. The carrier section 95 has a first end face 135 on. The first face 135 extends in the first transverse direction and the second transverse direction and is designed as a yz plane and is thus oriented perpendicular to the x axis. The first face 135 has a first maximum width in the first transverse direction b _ST on.

The first end face connects in the x direction 135 directly the first connecting device 50 at. In 2 closes in the x-direction on one of the first end face 135 facing away from the first connecting device 50 and the support section 95 the connecting section 80 at. The connecting section 80 is in the mold exit during casting 41 arranged and closes the circumference with a between the cold strand head 45 and the mold exit 41 inserted sealing cord when casting the mold outlet 41 essentially for the metallic melt 40 tight.

In the x direction, the connecting section 80 has a constant cross section, for example a rectangular cross section, in sections. The cross section refers to 2 on a cutting plane 85 which is arranged perpendicular to the x-axis. Another cross section would also be conceivable. For example, the cross section can also be bulged, barrel-shaped or tapering towards the center in the y-direction.
The connecting section 80 points to one of the support section 80 facing side a second end face 180 on. On the second face 180 is the beam section 95 connected and protrudes in the x-direction over the second face 180 . The connecting section 80 points on the second face 180 a maximum width bv in the first transverse direction, the first end face 135 preferably extends over at least 80 percent of the maximum width bv.

The second face 180 has a circumferential front face contour 98 and is designed as a yz plane, for example. The front contour 98 is substantially rectangular in plan view. The carrier section 95 is like this on the second face 180 positioned that the carrier section 95 on the back in 2 directly on the face contour 98 is arranged. The carrier section 95 tapers from the second face 180 towards the first face 135 .

To the connecting section 80 closes on one of the first connection means 50 facing away from the connecting section 80 (in the x direction) the third connecting device 90 directly on, with the third connecting device 90 the cold strand head 45 with the link chain 75 connected is.

In the y direction, at least one side, in 2 on both sides, one shield plate each 91 be arranged. The faceplate 91 protrudes in the y-direction over the second face 180 and closes flush with the second face 180 from. On the faceplate 91 can also be dispensed with. By means of the faceplate 91 can have a maximum total width in the y-direction of the cold strand head 45 can be easily customized. Several faceplates can be used for this 91 be arranged in a stack or made of face plates of different widths 91 , the matching faceplate 91 are selected and this on the side of the connecting section 80 attached.

The first connector 50 and the support section 95 can be made in one piece and of the same material with the connecting section 80 and the third connection means 90 be trained. In particular, the first connecting device 50 , the third connector 90 , the beam section 95 and the connecting portion 80 be a casting.

The carrier section 95 is plate-shaped. On a first broad side of the carrier section 95 that are on an in 2 The side facing the viewer is arranged, the carrier section 95 a first face 100 on. The first face 100 is inclined to the first face 135 and the second face 180 arranged. On a second wide side of the carrier section 95 that are on an in 2 The side facing away from the viewer is shown, the carrier section 95 a second side face 105 on. The second side face 105 is, for example, essentially planar and runs in 2 in an xy plane. The second side surface can also 105 be convex or concave.

In 2 the first connector 50 at least one first connecting element 110 and a second connector 115 on, for example the first and second connecting elements 110 , 115 in a row 120 are arranged on a first straight line that runs parallel to the y-axis. The number of fasteners 110 , 115 is freely selectable. The first and second connectors 110 , 115 are arranged alternately at a distance from one another. The two outer first connecting elements in the y-direction 110 are spaced from a side contour 116 of the carrier section 95 arranged

The first connecting element 110 and the second connecting element 115 be identical or different from one another. The design of the first connecting device 50 is exemplified using a first and a second connecting element 110 , 115 explained, the for the first and second connecting element 110 , 115 Also explained for the others in 2 first and second connecting elements shown 110 , 115 applies.

The connecting section 80 faces on a third broad side of the third connecting portion 80 , in the 2 is facing the viewer, a third side surface 121 on, with the third side face 121 is planar. The third side surface can also 121 convex or concave be trained. In particular, is the third side face 121 in the case of a convex configuration of the second side surface 105 likewise convex and with a concave configuration of the second side surface 105 also concave.

The first face 100 is on one of the third side faces 121 and the second face 180 facing side of the carrier section 95 arranged. The first face 100 is in the second transverse direction (z-direction) from the third side surface 121 towards the second side surface 105 set back.

3 shows an in 2 marked section A of the in 2 cold strand head shown 45 .

The first connector 110 has a first transverse bulge 125 and a first longitudinal bulge 130 on. The first transverse bulge 125 closes, for example, directly on the first end face in the x direction 135 at.

The first transverse bulge 125 is for example inclined, preferably oriented perpendicular to the x-axis. The first transverse bulge 125 is on the back, in 3 on a side facing away from the viewer, with the first side surface 100 with the carrier section 95 connected and protrudes over the first side surface 100 .

On one to the first face 135 facing away from the first transverse bulge 125 extends between the second end face 180 and the first transverse bulge 125 the first longitudinal bulge 130 along the x-axis, preferably parallel to the x-axis. The first longitudinal bulge 130 is exemplarily web-shaped. The first longitudinal bulge 130 has a constant cross section essentially along the x-axis, with increasing distance from the first side surface 100 , a maximum transverse extension of the first longitudinal bulge 130 decreases in the first transverse direction. The first longitudinal bulge 130 ends at the second face 180 and connects the second face 180 with the first transverse bulge 125 .

The first transverse bulge protrudes laterally (in the y-direction) 125 at least on one side, preferably as in 2 shown, on both sides laterally over the first longitudinal bulge 130 out. The first transverse bulge is here 125 for example in the middle in the y-direction with the first longitudinal bulge 130 connected so that the first connecting element 110 has an exemplary T-shaped configuration.

The first transverse bulge 125 has a second maximum width B _Q in the first transverse direction (y-direction). It is particularly advantageous if a width ratio ( B _Q : B _ST ) the second maximum width B _Q to the first maximum width B _ST of the carrier section 95 on the first face 135 is in a range from 1:10 up to and including 1: 1, in particular from 1: 8 up to and including 1: 1.

The carrier section 95 has a first longitudinal extent in the x direction l ₁ on. The first longitudinal bulge 130 has a second longitudinal extent in the x direction l ₂ on. It is particularly advantageous if a length ratio ( l ₂ : l ₁ ) the second longitudinal extension l ₂ to the first longitudinal extension l ₁ is in a range from 1: 4 to 1: 1.2 inclusive.

On one to the first face 135 facing away from the side has the first transverse bulge 125 a first holding surface 140 on. The first holding surface 140 adjoins the first side surface 100 and is for example at least partially inclined to the first side surface 100 aligned. The first holding surface 140 is an example on both sides of the first longitudinal bulge 130 each at the first transverse bulge 125 arranged.

On one of the third side faces 121 facing side has the first connecting element 110 a fourth face 145 on, being the fourth side face 145 both over the first transverse bulge 125 as well as the first longitudinal bulge 130 extends. The fourth face 145 is designed to be planar, for example, and preferably runs parallel to the first side surface 100 . The fourth side surface 145 based on the third side surface 121 set back along the z-axis of the second direction in the direction of the first side surface 100 be arranged.

As already explained above, the second connecting element is 115 offset in the first transverse direction (y-direction) and at a distance from the first connecting element 110 arranged. For example, the second connecting element has a second transverse bulge 150 and a second longitudinal bulge 155 on.

The second transverse bulge 150 closes in the x-direction on the first face 135 at. The first transverse bulge 125 and the second transverse bulge 150 exemplary on a common straight line 160 be arranged extending. Straight 160 is aligned parallel to the y-axis. Also the second transverse bulge 150 and the second longitudinal bulge 150 , 155 are on the back with the carrier section 95 connected and from the first side face 100 shaped. The second longitudinal bulge protrudes 155 and the second transverse bulge 150 about the first Side face 100 emerged. For example, protrudes at least on one side, preferably as in 3 shown, the second transverse bulge 150 on both sides laterally in the first transverse direction over the second longitudinal bulge 155 . For example, the second transverse bulge can be centered with the second longitudinal bulge 155 be connected, so that the second connecting element 115 Is T-shaped.

On the third side surface 121 facing side has the second connecting element 115 a fifth face 165 on, with the fifth side face 165 and the fourth face 145 are arranged in a common xy plane.

The second longitudinal bulge 155 connects the second face 180 with the second transverse bulge 150 and is up to the second face 180 guided. The second longitudinal bulge 155 has a substantially constant cross section along the x-axis and tapers to the fifth side surface 165 in the second transverse direction. On one to the first face 135 facing away from the side has, for example, on both sides of the second longitudinal bulge 155 the second transverse bulge 150 a second holding surface each 170 on. The second holding surface 170 adjoins the first side surface 100 at. The second holding surface 170 is inclined to the first side surface 100 aligned. The first holding surface 140 and the second holding surface 170 can have an identical contour.

The first connector 110 and the second connecting element 115 delimit a recess with respect to one another by the offset in the first transverse direction 175 . The recess 175 extends along the x-axis between the first end face 135 and the second face 180 of the connection section 80 .

The recess 175 points in a first recess section 185 between the first transverse bulge 125 and the second transverse bulge 150 (in the y-direction) a first minimal transverse extent a ₁ on. A second recess section 190 between the first longitudinal bulge 130 and the second longitudinal bulge 155 in the y-direction has a second minimal transverse extent a ₂ on. The second transverse stretch a ₂ is significantly larger than the first transverse extent a ₁ . The second transverse extension is preferably here a ₂ at least 1.5 to 5 times as large as the first transverse extent a ₁ .

In a plan view, the recess 175 through those in the 2 and 3 exemplary T-shaped design of the connecting elements 110 , 115 also an inverted T-shaped configuration.

Between two connecting elements 110 , 115 is the recess 175 arranged. The recesses 175 between the fasteners 110 , 115 can be designed to be identical to one another, for example.

4th shows a rear view of the cold strand head 45 .

The second side face 105 extends on the carrier section 95 along the x-axis over the connecting section 80 towards the third connection device 90 . The second side face 105 is essentially planar and designed as an xy plane. In the second face 105 can be a first deepening 195 be provided. The first recess 195 is an example in the y-direction in the central position of the first connecting device 50 arranged. On the first recess 195 can be omitted or several first wells can be used 195 be provided.

The first recess 195 has a substantially rectangular configuration in the rear view. The first recess 195 is, for example, groove-shaped and to the first side surface 100 trained closed. As a result, there is no fluidic connection through the first depression 195 between the first face 100 and the second side face 105 .

5 FIG. 11 shows a detail of a sectional view along a FIG 3 Section plane AA shown through the in 3 cold strand head shown 45 .

The first recess 195 is overlapping both in the x and in the y direction to the first connecting element arranged in the center in the y direction 110 arranged. Here, an overlap in the x direction or a y direction is understood to mean that when the first depression is projected 195 and the first connecting element 110 in the z-direction in a projection plane, which is designed as an xy plane, the first recess 195 and the first connector 110 cover in the projection plane.

The first face 100 is divided into the recess 175 in a first sub-area 200 and at least in a second sub-area 205 and preferably in a third sub-area 206 on. In the first transverse direction are next to the first partial area 200 the second part 205 and and opposite to the second partial area 205 the third sub-area 206 arranged. The second part 205 and the third sub-area 206 adjoin the first partial area in the first transverse direction 200 at.

The first part 200 extends essentially in the recess 175 between the first face 135 and the second face 180 . The first part 200 has a constant width along the x-axis, for example, essentially in the first transverse direction. The first transverse direction is adjacent to the first face 135 the first part 200 each through a first end of the first transverse bulge 125 and by a second end of the second transverse bulge arranged opposite the first transverse bulge in the y direction 150 limited.

6th FIG. 13 shows a sectional view along a line in FIG 3 Section plane BB shown through the in 3 cold strand head shown 45 .

In the first part 200 can be the first face 100 be essentially planar. As a result, the carrier section can essentially 95 have a substantially constant material thickness along the x-axis. At a first transition between the first sub-area 200 and the second face 180 can have a first, preferably part-circular rounding 210 the first face 100 be provided in order to create a first transition between the first partial area which is favorable in terms of casting technology 200 and the second face 180 to ensure. The first transition can also be dispensed with.

The first holding surface 140 is, for example, inclined at an angle to the first partial area 200 aligned. The first holding surface 140 can be curved. In particular, the first holding surface 140 be curved in shape. The first holding surface preferably close 140 and the first sub-area 200 the first face 100 an obtuse angle α.

In the embodiment, the first partial area is essentially exemplary 200 inclined, preferably perpendicular to the first end face 135 and the second face 180 aligned, the first sub-area 200 extends in an xy plane. At a second crossing 211 between the first sub-area 200 and the first face 135 can be the first face 100 be rounded.

Between the second side surface 105 and the first face 135 can have a first bevel 215 be provided. The first bevel 215 prevents the formation of stress cracks in the slab 35 when cooling the thin slab 35 . You can also use the bevel 215 the sealing cord is in contact.

A second rounding can also be used 220 at a third transition between the first face 135 and the fourth face 145 be provided to also a stress crack formation in the thin slab 35 when cooling the cast slab 35 to prevent.

Between the first face 100 in the first part 200 and the second side face 200 has the first support section 95 a first thickness d ₁ in the z-direction. Between the second side surface 125 and the third face 121 adjacent to the second face 180 has the connecting portion 80 a second thickness d ₂ on. Between the fourth side surface 145 and the second side face 125 has the first connecting device 50 a third thickness d ₃ on. It is particularly advantageous if a first thickness ratio d ₁ : d ₂ the first thickness d ₁ to the second thickness d ₂ from 1:20 up to and including 1: 3, in particular from 1: 9 up to and including 1: 3, particularly advantageously from 1: 9 up to and including 1: 6 inclusive. It is also advantageous if a second thickness ratio d ₃ : d ₂ the third thickness d ₃ to the second thickness d ₂ from 1: 6 up to and including 1: 1, in particular from 1: 3 up to and including 1: 1 inclusive, particularly advantageously from 1: 1.5 up to and including 1: 1.1 inclusive. The third thickness is advantageous d ₃ smaller than the second thickness d ₂ .

7th FIG. 13 shows a sectional view along a line in FIG 3 Section plane CC shown through the in 3 cold strand head shown 45 .

The second part 205 is in the first transverse direction between the first longitudinal bulge 130 on the one hand and the first sub-area 200 arranged on the other side. The third sub-area is preferably 206 in the first transverse direction between the second longitudinal bulge 155 and the first sub-area 200 arranged.

In the second part 205 has the first side face 100 a second recess each 225 on, the second indentation 225 in the x direction between each of the first holding surfaces 140 and the second face 180 is arranged. The second depression 225 is for example curved in such a way, for example running in a partially arcuate manner, that the first side surface 100 in the second recess 225 stepless from the first holding surface 140 in the second face 180 transforms. There is also a stepless transition between the first partial area in the first transverse direction 200 the first face 100 and the first longitudinal bulge 130 ensured.

Furthermore, between the second end face 180 and the third face 121 a second bevel 226 be provided. Also would be instead of the second bevel 226 a rounding conceivable. The second bevel 226 is as Chamfer formed and on the second bevel 226 the sealing cord is applied.

8th shows an in 2 marked section B of the in 2 cold strand head shown 45 .

In the third section 206 has the first side face 100 a third recess each 227 on, being the third indentation 227 in the x direction of the second holding surface 170 and the second face 180 is arranged. The third recess 227 is for example curved in such a way, for example running in a partially arcuate manner, that the first side surface 100 in the third recess 227 stepless from the second holding surface 170 in the second face 180 transforms. There is also a stepless transition between the first partial area in the first transverse direction 200 the first face 100 and the second longitudinal bulge 155 ensured.

The second depression 225 and the third recess 227 have the advantage of having a surface of the recess 175 is particularly high.

Outside on the outermost first connecting element 110 delimits the first connecting element 110 one more recess only on one side 176 . The further recess 176 is geometrically essentially identical to the recess 175 formed and extends to the side contour 116 in the first transverse direction. The further recess 176 is designed to be open in the first transverse direction. The further recess 176 also has the first and second sub-areas 200 , 205 on, in the second sub-area 205 the second recess 225 is arranged. The first sub-area extends in the y-direction starting at the side contour 116 up to the second part 205 .

The side contour 116 runs, for example, at an angle to the x-axis in the first partial area 200 . The second depression 225 is also directly adjacent to the first connecting element 110 on the to the side contour 116 facing side arranged.

9 shows a section of a perspective view of the hot strand 30th , especially the thin slab 35 , after pouring.

During the pouring of the metallic melt 40 in the mold 15th the metallic melt solidifies 40 and encloses the first connector 50 only partially. The second side face 105 is at the mold exit 41 and is preferably not in the metallic melt 40 locked in. Through the solidification of the metallic melt 40 forms on the first connecting device 50 corresponding to the first connecting device 50 the second connection means 55 out. The second connecting device 55 a negative shape of the first connector 50 on.

When pouring, the recess forms 175 the first connection device 50 a corresponding third connecting element 230 out. The third connecting elements 230 are arranged at a distance from one another, with two third connecting elements on each transverse side 230 a first recess 235 and on the other transverse side in the second direction two third connecting elements 230 a second recess 240 limit.

The first recess 235 corresponds to the first connecting element 110 and the second recess 240 corresponding to the second connecting element 115 shaped.

The third connecting element 230 is T-shaped like the recess 175 and points to one of the third end face 245 of the hot strand 30th facing away a third holding surface 250 on. In the first transverse direction opposite to the third holding surface 250 has the third connecting element 230 a fourth holding surface 255 on, the third holding surface 250 corresponding to the first holding surface 140 and the fourth holding surface 255 corresponding to the second holding surface 170 are shaped.

Through the second recess 225 is attached to the third connector 230 a first bulge 231 and through the third recess 227 a second bulge 232 shaped. The first bulge 231 and the second bulge 232 protrude in the z-direction over the rest of the third connecting element 230 emerged. The first sub-area with a flat design 200 forms a seventh side surface 233 out by the first and second bulges 231 , 232 is surmounted in the z-direction. Through the bulge 231 , 232 is the third and / or fourth holding surface 250 , 255 extended.

10 FIG. 13 shows a sectional view along the line in FIG 3 Section plane CC shown by a system 260 .

The system 260 is through the cold strand head 45 and the hot strand 30th educated. In the assembled or in the cast state of the hot strand 30th engages the first connecting element 110 into the first recess 235 and the second connecting element 115 into the second recess 240 one. The first transverse bulge engages behind 125 two third connecting elements each 230 in the first recess 235 in areas. The second transverse bulge also engages behind 150 in the second recess 240 two third connecting elements each 230 in areas. Furthermore, the Beam section 95 between the first face 135 and the second and / or third recess 225 , 227 the third connector 230 . The first holding surface is here 140 on the third holding surface 250 on one side and on the fourth holding surface 255 on the other side of the first transverse bulge 125 at. The second holding surface is also located 170 on one side on the third holding surface 250 and on the other side on the fourth holding surface 255 on.

A tensile force Fz acting along the x-axis for drawing the hot strand 30th from the mold 15th in the strand guide 20th is made by means of the link chain 75 in the cold strand head 45 initiated. The tensile force Fz is determined by the form fit of the first and second connecting devices 50 , 55 between the hot strand 30th and the cold strand head 45 transfer. Due to the inclined alignment of the holding surfaces 140 , 170 , 250 , 255 Furthermore, a frictional connection is formed between the first or second holding surface 140 , 170 and the corresponding third or fourth holding surface lying thereon 250 , 255 to transfer the tensile force Fz. Through the bulge 231 , 232 and the depression 225 , 227 the tensile force Fz to be transmitted is particularly large in comparison, albeit on the second and third indentations 225 , 227 in the cold strand head 45 is waived. In the strand guide 20th can strand guide rollers on the side of the hot strand 30th and the hot strand 30th further promote.

Around the cold strand head 45 from the hot strand 30th can be separated laterally by means of separating rollers in the context of a bottom-feeding process, a release force acting in the opposite direction to the z-direction F _L in the cold strand head 45 be introduced. Through the solvency F _L becomes the first connector 50 from the second connecting device 55 pulled out and the slab 35 on the second connecting device 55 demolded. The cold strand head 45 is in a rectilinear motion along the y-axis from the hot strand 30th pushed away and thus below the mold exit 41 to the side of the mold exit 41 moved away. Due to the rounded design of the bulges 231 , 232 and the rounded configuration of the second and third recesses 225 , 227 Demoulding is particularly easy, as it jams the cold strand head 45 is prevented on the hot strand. After the completion of the continuous casting, the cold strand head 45 pushed back under the mold exit and the mold exit 41 by inserting the cold strand head 45 from below into the mold exit 41 locked.

At the end of the strand guide 20th can by means of the separator 70 (see. 1 ) the second connecting device 55 be separated. The separator 70 can, for example, have scissors. After disconnecting the second connecting device 55 becomes the hot strand 30th , especially the thin slab 35 , conveyed into a rolling mill, preferably in a warm state. In the rolling mill, the thin slab is made 35 rolled a sheet.

11 FIG. 11 shows a perspective sectional view along the line in 3 Section plane CC shown through the system 260 .

As an alternative to the in 10 described possibility, the cold strand head 45 from the hot strand 30th by the release force acting in the z-direction F _L to solve, it is also possible that, for example, at the end of the strand guide 20th , the cold strand head 45 on the link chain 75 by means of a lifting means of the pouring device 25th is raised. The cold strand head 45 around an axis of rotation 265 , which runs parallel to the y-axis and the second end face 180 runs from the in 10 shown pulling position swiveled out so that the cold strand head 45 (as in 11 shown) inclined obliquely to the hot strand 30th is arranged.

The lifting or swiveling out of the cold strand head 45 can for example lead to a speed of the hot strand 30th with which the hot strand 30th along the strand guide 20th is performed, be synchronized, so that jamming or tensioning of the cold strand head 45 on the hot strand 30th or dragging the cold strand head 45 through the hot strand 30th is avoided. When swiveling out, the holding surfaces slide 140 , 170 , 250 , 255 one on top of the other, the configuration of the depressions 225 , 227 and the corresponding design of the bulges 231 , 232 form a kind of joint. The curved and elongated holding surfaces 140 , 170 , 250 , 255 allow a low-wear sliding movement of the cold strand head 45 on the hot strand 30th so that wear of the cold strand head 45 in the first connector 50 is kept low. This engages the first connecting device 50 into the second connecting device 55 non-destructive repealed or the hot strand 30th is attached to the second connector 55 demolded by the first connecting device.

Alternatively, the cold strand head 45 are lifted from the bottom up, thereby engaging the first connecting device 50 into the second connecting device 55 will be annulled. The cold strand head 45 in one movement, preferably a rectilinear movement, inclined, in particular perpendicular, to the first side surface 100 , for example parallel to the z-axis, from the hot strand 30th away.

Additionally or alternatively, the hot strand can 30th in one movement, especially in a rectilinear movement, for example parallel to the z-axis, of the cold strand head 45 , for example by lowering the hot strand 30th to be removed. This also engages the connecting devices 50 , 55 lifted into each other. The loosening takes place in all variants in such a way that the cold strand head 45 as a whole from the hot strand 30th Will get removed. The cold strand head can also be used 45 a tilting movement around the axis of rotation 265 carry out.

Through the longitudinal bulge 130 , 155 is the cold strand head 45 particularly rigid and a plastic deformation of the cold strand head 45 is avoided. The longitudinal bulges 130 , 155 stiffen the second and third sections 205 , 206 so that the beam section 95 through the second and / or third recess 225 , 227 shows no critical weakening. Furthermore, there is good power transmission of the tensile force F _Z between the transverse bulge 125 , 150 and the connecting portion 80 ensured.

Through the second recess 225 and the third recess 227 is a particularly deep reaching behind the first and second connecting device 50 , 55 ensured, so that a particularly high tensile force Fzbetween the hot strand 30th and the cold strand head 45 is transferable without tearing the hot strand. The design of the second and / or third recess 225 , 227 is chosen so that an undercut that cannot be demolded using the method described above is avoided during the casting of the hot strand.

Through the carrier section 80 becomes a non-demouldable undercut of the hot strand 30th at the cold strand head 45 avoided. As a result, there is no further work on the cold strand head after demolding 45 necessary so that a set-up time for the cold strand head described above 45 is particularly low.

12 shows a detail of a top view of a cold strand head 45 according to a second embodiment.

The cold strand head 45 is essentially identical to the one in the 1 to 8th , 10 and 11 explained cold strand head 45 educated. In the following, the differences between the in 12 cold strand head shown 45 compared to that in the 1 to 8th , 10 and 11 cold strand head shown 45 received.

The first connector 50 in the embodiment has only a single (first) connecting element 110 on. The first connector 110 has the first transverse bulge 125 and the first longitudinal bulge 130 on. The first transverse bulge 125 extends over a large part of the first maximum width b _ST in the first direction of the first face 135 and the second face 180 . The first transverse bulge preferably has 125 in the second maximum width B _Q at least 80% of the maximum width b _Q the second face 180 on. The first transverse bulge 125 can for example be centered on the first end face 135 be aligned in the first transverse direction. The first transverse bulge 125 is by means of the first longitudinal bulge 130 on the first face 135 facing away from the second face 180 connected. On both sides of the first longitudinal bulge 130 is the second recess 225 arranged. The second depression 225 is like in the 1 to 8th , 10 and 11 described trained. The through the first connector 110 limited recesses 175 are open laterally in the first transverse direction.

This configuration has the advantage that a casting mold for casting the cold strand head 45 is particularly simple and inexpensive. Around the on the first transverse bulge 125 acting tensile force F _Z particularly favorable by means of the first longitudinal bulge 130 to the second face 180 can be transferred to the 1 to 8th , 10 and 11 shown embodiment of the first longitudinal bulge 130 these can be made particularly wide in the first transverse direction.

13 shows a detail of a top view of a cold strand head 45 according to a third embodiment.

The cold strand head 45 is essentially identical to the one in the 1 to 8th , 10 and 11 cold strand head shown 45 educated. In the following, the differences between the in 13 cold strand head shown 45 compared to that in the 1 to 8th , 10 and 11 cold strand head shown 45 received.

In the embodiment, the number of the connecting members is 110 , 115 compared to that in the 1 to 8th , 10 and 11 number shown reduced by way of example. In the embodiment, the connecting elements are exemplary 110 , 115 L-shaped. The first transverse bulge thus protrudes 125 of the first connecting element 110 only on one side over the first longitudinal bulge 130 out. The second transverse bulge also protrudes 150 only on one side over the second longitudinal bulge 155 at the second connecting element 115 out.

In the embodiment, the first connecting element 110 and the second connecting element 115 partly the same orientation, with in 13 for example the second connecting element arranged on the right 115 to a between the first connecting element 110 and the second connecting element 115 arranged plane of symmetry 270 Is designed mirror-symmetrically and thereby an opposite orientation to the first connecting element 110 having. The plane of symmetry 270 is designed as an xz plane. This causes the first transverse bulge to run 125 and the second transverse bulge 150 towards each other. This can also be done in 13 on the right next to the first connecting element 110 arranged second connecting element 115 have the same orientation as the first connecting element 110 . Furthermore, in the in 13 embodiment shown only on one side of the respective connecting element 110 , 115 directly adjacent to the respective connecting element 110 , 115 each the recess 225 , 227 arranged. With identically aligned fasteners 110 , 115 , in 13 for example the first and second connecting element arranged on the left 110 , 115 , can be the first part 200 between the first and second connecting elements 110 , 115 directly to one of the two connecting elements 110 , 115 , for example to the first longitudinal bulge 130 of the first connecting element 110 , adjoin.

14th shows a section of a plan view of a cold strand head 45 according to a fourth embodiment.

The cold strand head 45 is essentially identical to the one in the 1 to 8th , 10 and 11 formed cold strand head shown. In the following, the differences between the in 13 cold strand head shown 45 compared to that in the 1 to 8th , 10 and 11 cold strand head shown 45 received.

In addition to the exemplary reduction in connecting elements 110 , 115 compared to that in the 1 to 8th , 10 and 11 The embodiment shown is the second connecting element 115 different than in the 1 to 8th , 10 and 11 shown trained. The second connecting element is an example 115 Y-shaped, while the first connecting element 110 - as in the 1 to 8th , 10 and 11 shown - T-shaped.

The second transverse bulge is here 150 curved, preferably V-shaped and is on the first face 135 remote side with the second longitudinal bulge 155 connected. This results in an indentation 275 between the first face 135 and the second transverse bulge 150 which has a triangular configuration in plan view. The indentation 275 advantageously extends into an xy plane in which the first end face 100 is arranged. This results in a structural weakening of the carrier section 95 avoided. When casting the hot strand 30th becomes the indentation 275 with the metallic melt 40 filled out.

On both sides of the respective connecting element 110 , 115 is an example of the second and third indentations 225 , 227 arranged. It is also possible to dispense with the two-sided arrangement and the second and third indentations 225 , 227 is only on one side of the first and / or second connecting element 110 , 115 arranged. For example, the depression extends in the y-direction up to the region of the transverse bulge that extends the furthest in the y-direction 125 , 150 . This can be an edge of the second transverse bulge 150 be on the first face 135 connects.

As an alternative to the in 14th The V-shaped configuration shown for the second transverse bulge could be the second transverse bulge 150 also be designed arcuately.

15th shows a plan view of a section of a cold strand head 45 according to a fifth embodiment.

The cold strand head 45 is essentially a further development of a combination of the 13 and 14th Shown embodiments of the cold strand head 45 .

An example is in 15th the first connector 110 Y-shaped, while the second connecting elements 115 Are L-shaped. The two second connecting elements are L-shaped 115 designed to the effect that this is mirror-symmetrical to the plane of symmetry 270 are aligned. The plane of symmetry 270 is designed as an xz plane and runs through the first connecting element in a central position 110 .

Compared to the 1 to 8th , 10 and 11 embodiment shown protrudes in 15th laterally the carrier section 95 not the second connector 115 , but closes flush with the second longitudinal bulge 155 and the second transverse bulge 150 sideways. This configuration also prevents back casting or an undercut on the first connecting device during continuous casting 50 .

The first connector 110 is Y-shaped, but compared to the in 14th shown embodiment of the second connecting element 115 the first transverse bulge 125 formed triangular. This allows the indentation 275 (see. 14th ) be avoided.

16 shows a section of a cold strand head 45 according to a fifth embodiment.

The cold strand head 45 is essentially a combination of the in 13 cold strand head shown 45 and that in the 1 to 8th , 10 and 11 cold strand head shown 45 . The first connector 110 is like in 13 shown, L-shaped. The first connection element differs from this 110 rotated around the z-axis compared to the in 13 shown embodiment arranged. This is the first transverse bulge 125 and the first longitudinal bulge 130 oriented obliquely to the x-axis and the y-axis. The first transverse bulge 125 is for example perpendicular to the first longitudinal bulge 130 arranged. Alternatively, it would also be possible that the first longitudinal bulge 130 perpendicular to the second face 180 is aligned parallel to the x-axis, while on the other hand (dashed lines in 16 indicated) the first transverse bulge 125 is aligned inclined. The second depression 225 extends up to, for example, one of the second end face 180 facing edge of the first transverse bulge 125 to ensure that the cold strand head can be removed from the mold properly 45 from the hot strand 30th to enable.

The second connecting element 115 is also aligned rotated about the z-axis. This creates the second transverse bulge 150 and the second longitudinal bulge 155 obliquely inclined to the second end face 180 and thus also aligned obliquely to the x and y axes. Adjacent to the second connecting element 115 is the third recess only on one side 227 in the first face 100 arranged. This is the third recess 227 on the second connecting element 115 arranged.

17th shows a detail of a top view of a cold strand head 45 according to a sixth embodiment.

The cold strand head 45 is essentially identical to the one in the 1 to 8th , 10 and 11 cold strand head shown 45 educated. In the following, the differences between the in 17th cold strand head shown 45 compared to that in the 1 to 8th , 10 and 11 cold strand head shown 45 received. Deviating from 1 to 8th , 10 and 11 is the number of fasteners 110 , 115 compared to that in the 1 to 8th , 10 and 11 The number of connecting elements shown is reduced by way of example. It could also be bigger than in the 1 to 8th , 10 and 11 shown.

In 17th is the first connecting element 110 with the first transverse bulge 125 each spaced apart in the x direction from the first end face 135 arranged. In this case, each of the first transverse bulges has, for example 125 of the first connecting elements 110 a different distance a ₁ , a ₂ to the first face 135 on. It would also be possible that the first connecting elements 110 the same distance each time a ₁ , a ₂ to the first face 135 exhibit. The second connecting element 115 is like in the 1 to 8th , 10 and 11 shown and is directly adjacent to the first end face 135 with the second transverse bulge 150 at. In general, it should be noted that the connecting element 110 , 115 can also be designed asymmetrically with a T-shaped or Y-shaped configuration. A distance in the y direction between the multiple connecting elements can also be achieved 110 , 115 be different.

18th shows a detail of a top view of a cold strand head 45 according to a seventh embodiment.

The cold strand head 45 is essentially a combination of the in 17th cold strand head shown 45 and that in the 1 to 8th , 10 and 11 cold strand head shown 45 .

The second transverse bulge 150 of the second connecting element 115 is spaced from the first end face 135 arranged.

The first connector 110 is opposite to those in the 1 to 8th , 10 and 11 The configurations shown vary in that the first transverse bulge 125 not like in the 18th shown at a longitudinal end of the first longitudinal bulge 130 is arranged, but laterally on the first longitudinal bulge 130 with the first longitudinal bulge 130 connected is. As a result, the first connecting element 110 a T-like configuration. On both sides of the second longitudinal bulge 155 is the third well, for example 227 in the first face 100 of the carrier section 95 educated. The third recess 227 is in 18th for example, made shorter in the y-direction than in the 1 to 8th , 10 and 11 shown and ends in the y-direction in front of a free end of the second transverse bulge 150 .

19th shows a detail of a top view of a cold strand head 45 according to an eighth embodiment.

The cold strand head 45 is essentially identical to the one in the 1 to 8th , 10 and 11 explained cold strand head 45 educated. In the following, the differences between the in 19th cold strand head shown 45 compared to that in the 1 to 8th , 10 and 11 cold strand head shown 45 received.

In the embodiment are the second recess 225 and the third recess 227 connected and merge into one another. Thus, the second and third recesses extend 225 , 227 and the second and third sub-areas 205 , 206 in the y-direction from the first longitudinal bulge 130 up to the second longitudinal bulge 155 . The second and third partial areas extend in the longitudinal direction (x direction) 205 , 206 and the second and third indentations 225 , 227 from the first and second transverse bulges 125 , 150 up to the second face 180 .

The first part 200 is opposite the 1 to 8th , 10 and 11 formed significantly narrower in the longitudinal direction. The first sub-area 200 have approximately the same longitudinal extension as the transverse bulge 125 , 150 . The first part 200 starts around the first face 135 and ends approximately at the height (in relation to the x-direction) of the holding surface 140 , 170 . In the longitudinal direction between the second end face 180 and the first sub-area 200 run the second and third recess 225 , 227 . This configuration has the advantage that compared to the 1 to 8th , 10 and 11 an increased tensile force between the cold strand head 45 and hot strand 30th can be transferred.

The third recess 227 , the outside on one to the side contour 116 facing side in the first side surface 100 is identical to that in 8th second recess shown.

Due to the particularly flat design of the 1 to 19th described embodiments of the cold strand head 45 this is particularly suitable for thin slabs 35 with a thickness (in the z-direction) of less than or equal to 18 cm, in particular with a thickness of 4 cm to 12.5 cm, in particular from 8 cm to 12 cm, to be manufactured inexpensively.

Using the cold strand head 45 there will be tension in the thin slab 35 avoided when cooling. Furthermore, the cold strand head described above forms 45 a particularly homogeneous structure in the hot strand 30th off, so that only the second connection device if necessary before rolling into sheet metal 55 by means of the separating device 70 is to be separated.

List of reference symbols

10

Continuous casting plant

15th

Mold

20th

Strand guide

25th

Sprue device

30th

Hot strand

35

Slab

40

melt

41

Mold exit

45

Cold strand head

46

axis

47

positive-locking connection

50

first connection device

55

second connecting device

70

Separator

75

Link chain

80

Connection section

85

Cutting plane

90

third connection device

91

Shield plate

95

Beam section

98

Face contour

100

first side face

105

second side face

110

first connecting element

115

second connecting element

116

Side contour

120

line

121

third side face

125

first transverse bulge

130

first longitudinal bulge

135

first face

140

first holding surface

145

fourth face

150

second transverse bulge

155

second longitudinal bulge

160

Straight

165

fifth side face

170

second holding surface

175

Recess

176

further recess

180

second face

185

first recess section

190

second recess section

195

first deepening

200

first part

205

second part

206

third sub-area

210

first rounding

211

second transition

215

first bevel

220

second rounding

225

second recess

226

second bevel

227

third specialization #

230

third connecting element

235

first recess

240

second recess

245

third face

250

third holding surface

255

fourth holding surface

260

system

265

Axis of rotation

270

Plane of symmetry

275

further recess

b _ST

first maximum width (of the first face)

b _Q

second maximum width (of the first transverse bulge)

d ₁

first thickness

d ₂

second thickness

d ₃

third thickness

l ₁

first longitudinal extension

l ₂

second longitudinal extension

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• AT 517976 A [0002]
• JP 48032902 Y1 [0003]

Claims (13)

Cold strand head (45) for the production of thin slabs for a continuous caster (10) with a first connecting device (50) for a positive connection (47) with a hot strand (30), - the first connecting device (50) having a carrier section (95), which is plate-shaped and has a first side surface (100) and a first end face (135), - wherein the first connecting device (50) is formed on a second end face (180) of a connecting section (80) of the cold strand head (45), - wherein the first side surface (100) is formed on a side of the carrier section (95) facing the second end face (180) of the connecting section (80), - the carrier section (95) at least in sections along the second end face (180) of the connecting section (80) is formed and protrudes along an axis (x) from the second end face (180) of the connecting section (80), - on the first side surface (100) of the carrier section (95) at least one first connecting element (110) is formed, which protrudes from the first side surface (100), - the first connecting element (110) having a first transverse bulge (125) and a first transverse bulge (125) connected to the first Has longitudinal bulge (130), - wherein the first transverse bulge (125) extends inclined to the axis (x) and protrudes laterally over the first longitudinal bulge (130), - wherein the first longitudinal bulge (130) up to the second end face (180) of the connecting section (80), - wherein the first transverse bulge (125) is designed to reach behind at least in sections the hot strand (30) to form the form-fitting connection (47), - characterized in that the first side surface (100) between the first transverse bulge (125) and the second end face (180) has a recess (225, 227). Cold strand head (45) according to one of the preceding claims, - The depression (225) directly adjoining the first longitudinal bulge (130) in a direction perpendicular to the axis (x), - The first longitudinal bulge (130) and the depression (225) merging into one another in a stepless manner. Cold strand head (45) according to one of the preceding claims, - The first side surface (100) being planar in a partial area (200), - wherein the partial area (200) adjoins the first end face (135) along the axis (x) and adjoins the first transverse bulge (125) and the depression (225) in a direction perpendicular to the axis (x). Cold strand head (45) according to one of the preceding claims, - At least one second connecting element (115) protruding from the first side surface (100) of the carrier section (95), - wherein the second connecting element (115) has a second transverse bulge (150) and a second longitudinal bulge (155) connected to the second transverse bulge (150), - wherein the second transverse bulge (150) extends inclined to the axis (x) and the second longitudinal bulge (155) protrudes laterally, - The second longitudinal bulge (155) extending into the second end face (180), - wherein in a direction perpendicular to the axis between the first connecting element (110) and the second connecting element (115) a recess (175) is arranged, which is delimited by the first side surface (100), - the recess (175) extending along the axis (x) between the first end face (135) and the second end face (180). Cold strand head (45) Claim 4 - wherein the first side surface (100) has a further recess (227) between the second transverse bulge (150) and the second end face (180). Cold strand head (45) according to one of the Claims 3 to 5 - wherein the partial area (200) adjoins the second transverse bulge (150) and the further depression (227) in the direction perpendicular to the axis (x). Cold strand head (45) according to one of the Claims 4 to 6th - wherein the first transverse bulge (125) and the second transverse bulge (150) are arranged on a common straight line (160). Cold strand head (45) according to one of the preceding claims, - wherein the carrier section (95) extends over at least 80 percent of a maximum width (bv) of the second end face (180) of the connecting section (80). Cold strand head (45) according to one of the preceding claims, - wherein the carrier section (95) along the axis (x) starting from the second end face (180) of the connecting section (80) to the first Front side (135) of the carrier section (95) is tapered. Cold strand head (45) according to one of the preceding claims, - wherein the first transverse bulge (125) has at least one first holding surface (140), - wherein the first holding surface (140) is arranged on a side facing the second end face (180) of the connecting section (80) and adjoins the first side surface (100) at least in sections, - The first holding surface (140) enclosing an obtuse angle (α) with the first side surface (100), - The first holding surface (140) and the recess (225) adjoining one another in a stepless manner. Cold strand head (45) according to one of the preceding claims, - wherein the first transverse bulge (125) and the first longitudinal bulge (130) are T-shaped or L-shaped or Y-shaped to one another. Cold strand head (45) according to one of the preceding claims, - wherein the carrier section (95) has a first maximum thickness (d ₁ ) perpendicular to the axis (x) and the connecting section (80) has a second maximum thickness (d ₂ ), - wherein a first thickness ratio (d ₁ : d ₂ ) of the first thickness (d ₁ ) to the second thickness (d ₂ ) of 1:20 up to and including 1: 3 inclusive, in particular from 1: 9 up to and including 1: 3 inclusive, particularly advantageously from 1: 9 up to and including 1: 6, and / or - wherein the first connecting device (50) has a third maximum thickness (d ₃ ) perpendicular to the axis (x) and the connecting section (80) has a second maximum thickness ( d ₂ ), - wherein a second thickness ratio (d ₃ : d ₂ ) of the third thickness (d ₃ ) to the second thickness (d ₂ ) from 1: 6 up to and including 1: 1, in particular from 1: 3 up to and including 1: 1 inclusive, particularly advantageously from 1: 1.5 inclusive up to and including 1: 1.1, - the second thickness (d ₂ ) advantageously being greater than the third thickness (d ₃ ). System (260), - Having a hot strand (30) and a cold strand head (45) which is designed according to one of the preceding claims, - wherein the hot strand (30) has at least one second connecting device (55), - wherein the first connecting device (50) and the second connecting device (55) engage behind one another to form the non-destructively releasable positive connection (47).

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