EP0733420B1 - Modular aufgebaute Stranggiesskokille - Google Patents
Modular aufgebaute Stranggiesskokille Download PDFInfo
- Publication number
- EP0733420B1 EP0733420B1 EP96810160A EP96810160A EP0733420B1 EP 0733420 B1 EP0733420 B1 EP 0733420B1 EP 96810160 A EP96810160 A EP 96810160A EP 96810160 A EP96810160 A EP 96810160A EP 0733420 B1 EP0733420 B1 EP 0733420B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mould
- inner sleeve
- lubricant
- coolant
- supporting body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000009749 continuous casting Methods 0.000 title claims description 52
- 239000002826 coolant Substances 0.000 claims abstract description 92
- 238000004519 manufacturing process Methods 0.000 claims abstract description 17
- 239000000314 lubricant Substances 0.000 claims description 90
- 239000000463 material Substances 0.000 claims description 33
- 229910052751 metal Inorganic materials 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 15
- 238000001125 extrusion Methods 0.000 claims description 10
- 229910001092 metal group alloy Inorganic materials 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 7
- 239000004605 External Lubricant Substances 0.000 claims description 4
- 230000006698 induction Effects 0.000 claims description 2
- 238000005461 lubrication Methods 0.000 claims description 2
- 230000005405 multipole Effects 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 claims description 2
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- 238000013019 agitation Methods 0.000 claims 1
- 210000001787 dendrite Anatomy 0.000 claims 1
- 238000003780 insertion Methods 0.000 abstract description 2
- 230000037431 insertion Effects 0.000 abstract description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 10
- 229910000838 Al alloy Inorganic materials 0.000 description 8
- 229910045601 alloy Inorganic materials 0.000 description 8
- 239000000956 alloy Substances 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 8
- 238000005096 rolling process Methods 0.000 description 8
- 238000009826 distribution Methods 0.000 description 7
- 150000002739 metals Chemical class 0.000 description 6
- 238000005304 joining Methods 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 230000009974 thixotropic effect Effects 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 229910000789 Aluminium-silicon alloy Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/049—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for direct chill casting, e.g. electromagnetic casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/055—Cooling the moulds
Definitions
- the present invention relates to a mold for the continuous casting of rolled or pressed bars containing a cylindrical mold cavity with an inflow and a Outlet opening, means for evenly applying coolant to the surface of the Rolled or pressed ingot after it emerges from the mold cavity and two closed annular mold elements with a common concentric central axis, the mold axis, a mold element, the inner sleeve, with respect to the
- the mold axis is on the inside and laterally delimits the cylindrical mold cavity, and the other mold element, the support body, lies on the outside with respect to the mold axis and receives the inner sleeve, the inner sleeve detachable by pushing it into the supporting body is connected to this and after joining the mold elements between Inner sleeve and support body a ring-shaped concentric with respect to the mold axis Cavity, the second coolant chamber, is formed for receiving coolant.
- the invention further relates to a method for producing rolled or pressed bars a metal or a metal alloy by continuous casting with a mold according to the invention.
- Coolable molds for the continuous casting of molten metals for the production of Ingots or bolts as primary material for their further processing by, for example Extrusion presses or rollers are known per se.
- the molds known from the prior art for the continuous casting of molten materials Metals by means of a coolable, shaping mold essentially consist of one coolable metal ring with an inlet and outlet opening, the metal ring usually a cylindrical or frustoconical mold cavity encloses.
- DE-OS 24 54 166 describes a mold for continuous, vertical continuous casting of copper alloys, the mold of one Cooling jacket is surrounded.
- Chill molds for the production of rolled or pressed bars with homogeneously distributed, primary solidified solid particles which consist of individual degenerate dentrites known for example from the patents DE 30 06 588 and DE 30 06 618.
- the inner walls of the molds exposed to the continuous casting material are of high height Exposed to abrasion.
- the continuous casting leads to a high temperature and Pressure load on the mold, so that the mold can be used for Achieving the desired bar or bolt shape optimal shape through thermal and can lose mechanical influences.
- the metal bolts or bars used as primary material must always be of product quality have the same cross-sectional dimensions. The required high dimensional accuracy of the Because of ingots used as primary material, the previously known molds must be in short Production intervals are replaced, whereby - due to the necessary Removal of the entire mold from the continuous casting facility - a high time, material and Costs result.
- the object of the present invention is therefore to create a mold for continuous casting of metals or metal alloys for the production of rolled or pressed bars, which Avoids disadvantages described above and the inexpensive manufacture of rolling or Press bars with constant bar or bolt cross-section enabled. Another job
- the present invention also consists in specifying a method for the production of rolled or pressed bars using such a cost-saving mold.
- the object relating to the mold is achieved in that the inner sleeve essentially a hollow cylindrical body with a terminal end on the inflow side molded, outwardly projecting, annular flange, the support body a has an annular rib formed on the outlet side and protruding against the mold cavity, the inner sleeve and the support body are designed such that the inner sleeve in inserted state is positively attached to the rib on the outlet side and on the inflow side the flange has a positive fit on the wall of the supporting body directed against the inner sleeve comes to rest, the second coolant chamber through the flange, the rib, the wall of the support body directed against the inner sleeve and that against the support body directed wall of the inner sleeve is limited, and the means for uniform Applying coolant to the surface of the rolled or pressed ingot after it has emerged from the mold cavity from a plurality of machined into the annular rib Secondary coolant channels exist, on the one hand
- the mold according to the invention has two mold elements with different functions on.
- the annular inner sleeve is used to shape the continuous casting material and provides thus the part of the mold that is exposed to high abrasion and pollution is.
- the ring-shaped support body takes on its essentially cylindrical shape Cavity on the inner sleeve and gives the mold the necessary for continuous casting mechanical stability.
- Both mold elements expediently have a substantially hollow cylindrical shape Shape up.
- the cross section of the mold cavity can be, for example, any one represent the area enclosed by a closed, convex curve. Is preferred the cross-sectional area is enclosed by a circle or a convex polygon.
- the two-part structure of the mold according to the invention thus allows the replacement of only one mold element, namely that which has a high abrasion or pollution is exposed.
- the mold according to the invention allows the expansion of the soiled mold parts for easier cleaning without removing the whole mold from the mold Having to remove the continuous casting device and thus enables considerable cost savings compared to the use of molds known from the prior art.
- the mold according to the invention is expediently mechanically complex Means to be produced, for example for taking up and introducing coolant or lubricant in the support body, since this usually has a much longer life than the inner sleeve.
- the mold according to the invention is suitable, for example, for horizontal or vertical Continuous casting of molten metals, preferably light metals and in particular of aluminum or aluminum alloys. All commercially available are particularly suitable for this Aluminum alloys and aluminum of all purity levels.
- the mold according to the invention is particularly preferred for the continuous casting of metal alloys for the production of rolled or pressed bars with homogeneously distributed primarily solidified solid particles, which consist of individual degenerate dentrites, are used.
- Such rolled or pressed bars which serve as primary material, show after they have been heated to a temperature between the corresponding solidus and liquidus temperature the metal alloy, thixotropic properties.
- the metal alloys of such rolling or Press bars in the thixotropic state contain the reverse developed dentritic, primary solid particles in a matrix of liquid metal surrounding them.
- good casting, rolling and finished part properties have rolled or pressed bars, which are further processed in the thixotropic state, preferably a homogeneously distributed fine and isotropic grain, the degenerate dentrites preferably being globulistic Show shape.
- the support body of the mold according to the invention can be made of any material which the mold has sufficient mechanical and thermal strength as well as sufficient Dimensional stability, exist. Metals or Metal alloys and in particular aluminum or its alloys are used. All the support body preferably consists of AlMgSi alloys.
- the inner sleeve preferably consists of aluminum or its alloys or copper or its alloys.
- the inner sleeve is very preferably made of AlMgSi alloys.
- a further preferred embodiment of the mold according to the invention consists of the inner sleeve made of aluminum or an aluminum alloy and points against the mold cavity directed surface on a graphite layer or a graphite ring.
- the dimensions of the mold according to the invention depend, for example, on the desired ones Final dimensions of the rolled or pressed bars.
- the length of the mold cavity or the length of the inner sleeve is, for example, 2 to 20 cm, expediently 2 to 10 cm and preferably between 3 and 6 cm.
- the length of the support body is, for example 3 to 25 cm, preferably 3 to 15 cm and preferably between 4 and 8 cm.
- the diameter of the mold cavity is, for example, 3 to 20 cm, advantageously 4 to 15 cm and preferably between 6 and 15 cm.
- the outer diameter of the body is not critical in itself; for example, it is 8 to 25 cm, advantageously 9 to 20 cm and preferably between 11 and 18 cm.
- the mold elements are releasably connected to one another.
- the joining of the two mold elements happens by inserting the inner sleeve into the support body, the inner sleeve is preferably inserted essentially completely into the supporting body.
- the inner sleeve on the side facing the support body and / or the support body on the the side facing the inner sleeve are such that after the assembly of the two mold elements between the inner sleeve and support body with respect to the mold axis concentric, annular cavity, the so-called second coolant chamber for the absorption of coolant occurs.
- This second coolant chamber enables cooling the inner sleeve, as a result of which the surface of the inner sleeve facing the mold cavity, the so-called inner surface of the inner sleeve, as a cooling surface for the during Continuous casting is used as continuous casting material.
- the inner sleeve expediently has a thin wall thickness.
- the support body for receiving coolant preferably contains one with respect to the mold axis concentric, annular cavity, the so-called first coolant chamber, and means for the supply of coolant from an external coolant supply in the first coolant chamber, the first and second coolant chambers being connected to one another via a or a plurality of connecting channels or an annular ring which is concentric with respect to the mold axis Connection opening are connected.
- the connection channels can for example represent holes in the supporting body.
- the annular connection opening will preferably by an annular groove-shaped recess concentric with respect to the mold axis formed in the support body, the annular groove-shaped recess at least partially forms the annular connection opening and is designed such that it has a Through-holes provided ring-shaped body, the so-called coolant distributor ring, can record.
- the ring-shaped body is, for example, one with through holes provided metal ring.
- the annular groove-shaped recess is preferably formed such that the surface of the mold directed into the mold cavity is shaped like an annular groove Recess used coolant distributor ring flush with the inner surface of the Completes the body.
- the angle specifications relate to this in the present text always on a full circle of 360 °.
- the support body preferably has at least one, preferably 1 to 4, coolant channels through which the first coolant chamber with the inflow end face of the support body connected to the external coolant supply. With inflow side The end face is the side of the support body facing the inflow opening.
- the Carrier body on the side facing the mold cavity preferably a cylindrical Inner surface, at the end of which is directed towards the mold cavity, annular rib is formed.
- the inner sleeve particularly preferably represents a hollow cylindrical one Part with an annular flange formed on the inflow end, wherein the annular flange is directed against the support body and the hollow cylindrical Part of the inner sleeve on the rib of the support body and the annular flange on the cylindrical inner surface of the support body comes to rest, so that through the inner sleeve and the annular body enclosed by the support body, the second coolant chamber forms.
- the height of the flange and the height of the rib is preferably selected such that the Inner surface of the inner sleeve represents a straight cylinder surface, the cylinder axis with the The mold axis coincides.
- the second coolant chamber means for uniform coolant application to the surface of the rolled or pressed ingot after it emerges from the mold cavity.
- Prefers are the means for uniform coolant application to the surface of the Rolled or pressed bars from a large number, preferably 40 to 70, of secondary coolant channels, which are connected on the one hand to the second coolant chamber and on the other hand at an angle to the surface of the rolled or pressed ingot emerging from the mold are directed.
- the secondary coolant channels are particularly preferably arranged radially uniformly, so that viewed in the mold cross-section with respect to two adjacent secondary coolant channels enclose the same central angle of the mold axis, the central angle, based on a full circle of 360 °, preferably between 5 and 10 °.
- the Mold elements Means for the supply of lubricant to the end face of the inflow Inner sleeve on.
- the inner sleeve particularly preferably faces the support body Side and / or the support body on the side facing the inner sleeve with respect the mold axis concentric, annular groove-shaped recess, so that after the Joining the two mold elements into an annular cavity, the lubricant distributor ring, is formed to hold lubricant.
- The is particularly preferred annular groove-shaped inlet and outlet side with annular sealant, sealed between the inner sleeve and the support body.
- All the support body particularly preferably have on the side facing the inner sleeve and / or the inner sleeve on the inflow and outflow side facing the support body to the lubricant distributor ring on annular groove-shaped recesses arranged in this way are that after joining the two mold elements, annular cavities arise in which the sealing means, for example sealing rings, are introduced can.
- the lubricant distributor ring is preferably over a large number, preferably 15 to 30, of lubricant channels let into the inner sleeve with the inflow end face of the Inner sleeve in connection, and the lubricant distributor ring is connected to at least one, preferably 1 to 4, lubricant filling channels embedded in the supporting body for the supply of lubricant from an external lubricant supply, the Connection of the lubricant filling channel to the external lubricant supply is preferred happens on the inflow end face of the support body.
- Very particularly preferred close - viewed in a cross section through the inner sleeve - two neighboring ones Lubricant channels with respect to the mold axis each have the same central angle, whereby the central angle is preferably 10 to 30 °.
- the inflow-side end face of the inner sleeve further preferably has an annular groove-shaped recess on, the so-called lubricant outlet ring, which connects the to the inflow Connects end face of the inner sleeve opening lubricant channels.
- This Lubricant outlet ring has the task of further distributing the lubricant radially to improve.
- lubricant guide on which the continuous casting material receiving inner surface of the inner sleeve has the inner sleeve in a further preferred Embodiment of the mold according to the invention on its inner surface lubricant guide on.
- These lubricant guiding means can, for example, essentially Represent grooves running parallel to the mold axis. The grooves are expedient designed such that they are in the direction of the groove depth and groove width Widen the outlet opening conically. So that the lubricant is not essential Portion flows away through the lubricant guide means without the remaining inner surface of the To lubricate the inner sleeve, the lubricant guide means preferably do not begin immediately at the inflow opening, i.e.
- the lubricant guide means start in a preferred one Embodiment of the mold according to the invention - in the flow direction of the continuous casting material considered - only after a certain distance, for example 1/4 to 1/3 of the length corresponds to the mold cavity.
- the number of grooves required depends, for example of the continuous casting material, the lubricant, the continuous casting parameters and the size of the Mold cavity and is expediently 100 to 300, preferably 150 to 200 Grooves.
- the object according to the invention is achieved in that a molten metal or a molten metal alloy, the continuous casting material, through the mold cavity of the inner sleeve of the mold according to the invention guided and continuously lubricant to the inflow end face of the inner sleeve is passed, the lubricant flowing from the inlet opening Continuous casting material continuously recorded and thus a continuous lubrication of the the entire inner surface of the inner sleeve is ensured, the continuous casting material on the Inner surface of the inner sleeve is subjected to primary cooling, so that from the Rolling or pressing bars emerging from the mold at least in its outer edge zone in is in solid form and the rolled or pressed ingot after it has left the Chill according to the invention by secondary cooling by means of coolant is further cooled.
- the method according to the invention is particularly suitable for horizontal or vertical Continuous casting of aluminum or its alloys, aluminum of all purity levels and all commercially available aluminum alloys come into question.
- the method according to the invention is preferred for the production of rolled or pressed bars with homogeneously distributed, primarily solidified solid particles that consist of individual degenerate
- the continuous casting material is vigorously stirred at least in the entire solidification zone.
- Solid particles consisting of individual degenerate dentrites are suitable, for example Aluminum, magnesium or zinc alloys and in particular AlSi, AlSiMg, AlSiCu, AlMg, AlCuTi and AlCuZnMg alloys.
- the molten continuous casting material is, for example, by means of an inlet nozzle at least partially forms a ceramic sleeve, introduced into the mold according to the invention.
- the molten continuous casting material is preferably stirred by an electromagnetic one Stirring device that generates a magnetic field rotating around the mold axis.
- the stirring is particularly preferably carried out by means of a stator of a multi-pole, for example two, four, or in particular six-pole induction motor.
- Figure 1 shows a plan view of the inflow-side part of the mold according to the invention.
- FIG. 2 shows a longitudinal section through the mold along the mold axis the line B-B according to FIG. 1.
- Figure 3 shows a longitudinal section of the mold along the line A-A of Figure 1 and shows thus a mold longitudinal section, on the one hand through a lubricant filling channel and on the other runs through a coolant channel.
- Figure 1 shows the top view of the inflow-side part of a mold according to the invention horizontal or vertical continuous casting of rolled or pressed bars.
- the top view shows the inflow-side end faces of the mold elements releasably connected, the Support body 20 and the inner sleeve 30, wherein the two mold elements 20, 30 a concentric Have center axis, the so-called mold axis m, and with respect to this show a rotationally symmetrical cross section.
- the top view also shows the circular one Inflow opening 12 of the mold cavity 10.
- the inner sleeve 30 is detachably connected Condition of the mold elements 20, 30 - at least partially - directly on the inner surface 16 of the supporting body 20, the inflow-side end face 48 of the inner sleeve 30 is set back with respect to the inflow end face of the support body 20, so that a cavity, the nozzle recess 28, is formed, in which a - not shown - Cuff, for example made of ceramic material, an inlet nozzle for the through the Chill mold can be inserted in a form-fitting manner.
- a - not shown - Cuff for example made of ceramic material
- the cuff the inlet nozzle becomes tight with the inflow-side end face 48 of the inner sleeve added, so that no continuous casting material between the inner surface during the continuous casting 16 of the support body 20 and the sleeve of the inlet nozzle can emerge.
- the support body 20 shown in Figure 1 has two coolant channels 21 for introducing Coolant in the first coolant chamber 22, the two coolant channels 21 in Include cross-section with respect to the mold axis m a central angle of 180 °.
- the Coolant channels 21 connect the first coolant chamber 22 to the inflow end face of the support body 20.
- the coolant channels 21 have a circular top view Opening and run parallel to the mold axis m into the interior of the support body 20th figure 1 further shows the opening of a lubricant filling channel 43 located in the carrier body 20, which in cross section with respect to the mold axis m with the coolant channels 21 has a central angle of 90 ° (right angle).
- the lubricant filling channel 43 has in the Top view of a circular opening and runs parallel to the mold axis m inside of the supporting body 20.
- the top view of a mold according to the invention shown in FIG. 1 further shows the inflow side Openings of a plurality of lubricant channels 42 and a lubricant outlet ring 41.
- the inflow-side openings of the lubricant channels 42 are uniform distributed over the front of the support body, i.e. two adjacent lubricant channels 42 close seen in cross section, with respect to the mold axis m, always the same central angle on.
- the lubricant outlet ring 41 provides an annular groove-shaped recess in the inflow-side end face 48 of the inner sleeve 30, which from the lubricant channels 42 escaping lubricant collects and evenly over the entire lubricant outlet ring 41 distributed.
- the lubricant is removed during the continuous casting process the mold cavity 10 flowing continuous casting material detected, thereby creating a uniform thin film of lubricant between the continuous casting material and the inner surface 46 of the inner sleeve 30 is formed.
- FIG. 2 shows a longitudinal section of the mold running through the mold axis m the line B-B according to FIG. 1.
- the inner sleeve is detachably connected to the supporting body 20 30 shown.
- the of the inner surface 46 of the inner sleeve 30 and the inflow and Outlet openings 12, 14 enclosed space forms the cylindrical mold cavity 10.
- the support body 20 lies with respect to the mold cavity 10 on the outside and the inner sleeve 30 inside.
- the carrier body 20 contains an annular, concentric with respect to the mold axis m first coolant chamber 22 through at least one coolant channel 21 for introducing the Coolant in the first coolant chamber 22 with the inflow-side surface of the support body 20 is connected.
- the inner sleeve 30 is on the side facing the support body 20 such that after joining the two mold elements 20, 30 between the inner sleeve 30 and Support body 20 a ring-shaped, second, concentric with respect to the mold axis m Coolant chamber 32 is formed, which with the first coolant chamber 22 via a coolant distributor ring 26 is connected.
- the coolant distributor ring 26 provides a metal ring designed as a separate mold element with a plurality of through holes 27, with two adjacent through holes 27 viewed in cross section with respect to the mold axis m the same Include central angle.
- the support body 20 has the mold cavity on it facing side an annular groove-shaped recess concentric with the mold axis m which at least partially has an annular connection opening with the first Has coolant chamber 22.
- the annular groove-shaped recess serves to receive the Through holes 27 provided coolant distributor ring 26.
- the annular groove The recess and the coolant distributor ring 26 are configured such that the coolant distributor ring 26 in a form-fitting manner in the annular groove-shaped recess of the supporting body 20 fits, i.e.
- the coolant distributor ring 26 can be cut open at one point, for example be so that the coolant distributor ring 26 for insertion into the annular groove Elastic recess can be deformed.
- the inner sleeve 30 has on the side facing the support body 20 with respect to the Chill axis m annular groove-shaped recess, which in cooperation with the Mold cavity 10 facing side of the support body 20 an annular cavity, forms the lubricant distributor ring 40 for receiving lubricant.
- the lubricant distributor ring 40 is with a lubricant filling channel embedded in the support body 20 43 connected. The lubricant distributor ring 40 thus serves for the radial distribution of the lubricant flowing through the lubricant filling channel 43.
- This lubricant distributor ring 40 also stands over a multiplicity of lubricant channels let into the inner sleeve 30 42 with the inflow-side end face 48 of the inner sleeve 30 in connection, see above that the lubricant located in the lubricant distribution ring 40 by the radial, for example uniform, distributed lubricant channels 42 in the on the inflow End face 48 of the inner sleeve 30 located lubricant outlet ring 41 can flow.
- the Lubricant channels 42 are preferably arranged such that in a mold cross section considers two adjacent lubricant channels 42 with respect to the mold axis m in each case include the same central angle.
- the lubricant is in the lubricant outlet ring 41 radially evenly distributed again. During the continuous casting process, this will Lubricant exit ring 41 located lubricant from the continuous casting material flowing past continuously captured, so that between continuous casting material and the inner surface 46 of the inner sleeve 30 forms a thin lubricant
- annular groove-shaped recess of the inner sleeve 30 and the inner surface 16 of the Carrier body 20 formed lubricant distributor ring 40 is on the inflow and outlet side with annular sealing means 44, which between the inner sleeve 30 and the support body 20 to come to rest, sealed, i.e. on both sides for the formation of the lubricant distribution ring 40 necessary, annular groove-shaped recess of the inner sleeve 30, the inner sleeve parallel to the lubricant distribution ring 40, perpendicular to the mold axis, have further annular groove-shaped recesses which - for example together with corresponding recesses in the support body 20 - for receiving annular sealing means 44, such as sealing rings, serve.
- the inner sleeve 30 also has on its inner surface 46 extending parallel to the mold axis m Grooves 50, wherein the grooves 50 with respect to their groove depth and groove width in Expand conically in the direction of the outlet opening 14. These grooves 50 serve essentially for guiding the lubricant in the exit-side area of the mold cavity 10, i.e. they are used to distribute the lubricant evenly.
- those incorporated into the inner sleeve begin Grooves 50 in the flow direction of the continuous casting material only after a certain distance, for example 1/4 to 1/3 of the length of the mold cavity 10 or the inner sleeve 30 corresponds.
- the support body 20 has a cylindrical shape on the side facing the mold cavity Inner surface 16, to the one at the exit end against the mold cavity 10 directed, annular rib 18 is formed.
- the inner sleeve 30 has a hollow cylindrical shape Part 34 with an annular flange 36 formed on the inflow end on, wherein the annular flange 36 is directed against the support body 20.
- the ring-shaped Flange 36 contains the lubricant channels 42 and for the creation of the lubricant distribution ring 40, the lubricant outlet ring 41 and the one for receiving the Sealing means 44 required annular groove-shaped recesses.
- the hollow cylindrical part 34 of the inner sleeve 30 has in the outlet-side area directed against the support body Side a further annular groove-shaped recess, the stop 39. This is used for positive reception of the outer area protruding against the mold cavity 10 the annular rib 18 of the support body 20th
- the two mold elements 20, 30 are expediently joined together by inserting the inner sleeve 30 into the support body 20, the one on the outlet side Area of the inner sleeve 30 lying, annular stop 39 form-fitting in the outer Area of the annular rib 18 of the supporting body which projects against the mold cavity 10 20 takes hold.
- the hollow cylindrical part 34 of the inner sleeve 30 on the annular rib 18 and the molding 38 of the annular flange 36 on the cylindrical inner surface 16 of the support body 20 lie, so that the enclosed by the inner sleeve 30 and the support body 20 annular cavity the second coolant chamber 32 forms the height of the flange 36 and the height of the annular rib 18 are chosen such that the inner surface 46 of the inner sleeve 30 represents a straight cylinder surface, the cylinder axis of which is with the mold axis m coincides.
- the hollow cylindrical part 34 of the inner sleeve 30 serves the primary cooling of the through Mold cavity 10 flowing continuous casting material and therefore has - the good Heat dissipation from the continuous casting material to the coolant because - preferably one thin wall thickness.
- the hollow cylindrical part 34 of the inner sleeve 30 made of a good heat-conducting material, preferably copper, copper alloys, Aluminum or aluminum alloys.
- Hollow cylindrical parts are further preferred 34 made of aluminum or aluminum alloys, which on the facing the mold cavity Side have a graphite ring.
- the annular rib 18 of the supporting body 20 also has a multiplicity, for example 40 to 60, of secondary coolant channels directed obliquely at the billets emerging from the mold 24 on, which are in communication with the second coolant chamber 32 and for Secondary cooling by applying coolant to the rolling or press ingot after it Exit exit opening 14 serve.
- Figure 3 shows a longitudinal section of the mold along the line A-A of Figure 1 and shows thus a mold longitudinal section, on the one hand through a lubricant filling channel 43 and on the other hand, runs through a coolant channel 21.
- a coolant channel 21 for introducing the coolant into the first coolant chamber 22 and the lubricant filling channel 43 for introducing Lubricant shown in the lubricant distributor ring 40.
- the mold according to the invention can be used to manufacture conventional rolled or pressed bars by continuous casting of molten metal alloys or for the production of Rolled or pressed bars with homogeneously distributed, primarily solidified solid particles individual degenerate dentrites exist.
- the mold according to the invention allows the inner sleeve to be replaced quickly, i.e. replacing only that of abrasion and Part of the mold exposed to contamination, which reduces the manufacturing costs of rolling or pressed bars compared to those with molds known from the prior art manufactured rolled or pressed bars can be significantly reduced.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Led Devices (AREA)
- Physical Vapour Deposition (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Description
Claims (18)
- Kokille zum Stranggiessen von Walz- oder Pressbarren enthaltend einen zylinderförmigen Kokillenhohlraum (10) mit einer Zufluss- (12) und einer Austrittsöffnung (14), Mittel (24) zur gleichmässigen Kühlmittelbeaufschlagung der Oberfläche des Walz- oder Pressbarrens nach dessen Austritt aus dem Kokillenhohlraum (10) und zwei geschlossen ringförmige Kokillenelemente (20, 30) mit einer gemeinsamen konzentrischen Mittelachse, der Kokillenachse (m), wobei ein Kokillenelement, die Innenhülse (30), bezüglich der Kokillenachse (m) innen liegt und den zylinderförmigen Kokillenhohlraum (10) seitlich begrenzt, und das andere Kokillenelement, der Tragkörper (20), bezüglich der Kokillenachse (m) aussen liegt und die Innenhülse (30) aufnimmt, die Innenhülse (30) durch Einschieben in den Tragkörper (20) lösbar mit diesem verbunden ist und nach dem Zusammenfügen der Kokillenelemente (20, 30) zwischen Innenhülse (30) und Tragkörper (20) ein bezüglich der Kokillenachse (m) konzentrischer, ringförmiger Hohlraum, die zweite Kühlmittelkammer (32), für die Aufnahme von Kühlmittel gebildet wird,
dadurch gekennzeichnet, dass
die Innenhülse (30) im wesentlichen einen hohlzylinderförmigen Körper mit einem zuflussseitig endständig angeformten, nach aussen ragenden, ringförmigen Flansch (36) darstellt, der Tragkörper (20) eine austrittsseitig angeformte, gegen den Kokillenhohlraum (10) ragende, ringförmige Rippe (18) aufweist, die Innenhülse (30) und der Tragkörper (20) derart ausgebildet sind, dass die Innenhülse (30) im eingeschobenen Zustand austrittsseitig formschlüssig an der Rippe (18) festliegt und zuflussseitig der Flansch (36) formschlüssig auf die gegen die Innenhülse gerichtete Wandung des Tragkörpers (20) zu liegen kommt, wobei die zweite Kühlmittelkammer (32) durch den Flansch (36), die Rippe (18), die gegen die Innenhülse (30) gerichtete Wandung des Tragkörpers (20) und die gegen den Tragkörper (20) gerichtete Wandung der Innenhülse (30) begrenzt wird, und die Mittel zur gleichmässigen Kühlmittelbeaufschlagung der Oberfläche des Walz- oder Pressbarrens nach dessen Austritt aus dem Kokillenhohlraum (10) aus einer Vielzahl von in die ringförmige Rippe (18) eingearbeitete Sekundär-Kühlmittelkanälen (24) bestehen, die einerseits mit der zweiten Kühlmittelkammer (32) in Verbindung stehen und andererseits schräg auf die Oberfläche des aus der Kokille austretenden Walz- oder Pressbarrens gerichtet sind. - Kokille nach Anspruch 1, dadurch gekennzeichnet, dass der Tragkörper (20) einen bezüglich der Kokillenachse (m) konzentrischen, ringförmigen Hohlraum, die erste Kühlmittelkammer (22), zur Aufnahme von Kühlmittel, sowie Mittel (21) für die Zufuhr von Kühlmittel aus einer externen Kühlmittelversorgung in die erste Kühlmittelkammer (22) enthält, wobei die erste und die zweite Kühlmittelkammer (22, 32) miteinander über eine oder mehrere Verbindungskanäle (27) oder eine bezüglich der Kokillenachse konzentrische, ringförmige Verbindungsöffnung verbunden sind.
- Kokille nach Anspruch 2, dadurch gekennzeichnet, dass die ringförmige Verbindungsöffnung durch eine bezüglich der Kokillenachse (m) konzentrische, ringnutförmige Ausnehmung im Tragkörper (20) gebildet wird, wobei die ringnutförmige Ausnehmung wenigstens teilweise die ringförmige Verbindungsöffnung bildet und derart ausgebildet ist, dass sie einen mit Durchangsbohrungen (27) versehenen ringförmigen Körper, den Kühlmittel-Verteilerring (26), aufnehmen kann.
- Kokille nach Anspruch 2, dadurch gekennzeichnet, dass der Tragkörper (20) wenigstens einen, vorzugsweise 1 bis 4, Kühlmittelkanäle (21) aufweist, durch welche die erste Kühlmittelkammer (22) mit der zuflusseitigen Stirnfläche des Tragkörpers (20) für den Anschluss an die externe Kühlmittelversorgung verbunden ist.
- Kokille nach Anspruch 1, dadurch gekennzeichnet, dass die Mittel zur gleichmässigen Kühlmittelbeaufschlagung der Oberfläche des Walz- oder Pressbarrens nach dessen Austritt aus dem Kokillenhohlraum (10) aus 40 bis 70 Sekundär-Kühlmittelkanälen (24) bestehen.
- Kokille nach Anspruch 5, dadurch gekennzeichnet, dass die Sekundär-Kühlmittelkanäle (24) radial gleichmässig angeordnet sind, so dass im Kokillenquerschnitt betrachtet zwei benachbarte Sekundär-Kühlmittelkanäle (24) bezüglich der Kokillenachse (m) jeweils den selben Zentriwinkel einschliessen, wobei der Zentriwinkel -- bezogen auf einen Vollkreis von 360° -- vorzugsweise zwischen 5 und 10° beträgt.
- Kokille nach Anspruch 1, dadurch gekennzeichnet, dass der Tragkörper (20) und die Innenhülse (30) Mittel (40, 41, 42, 43) für die Zufuhr von Schmiermittel an die zuflusseitige Stirnfläche (48) der Innenhülse (30) aufweisen.
- Kokille nach Anspruch 7, dadurch gekennzeichnet, dass die Innenhülse (30) auf der dem Tragkörper (20) zugewandten Seite und/oder der Tragkörper (20) auf der der Innenhülse (30) zugewandten Seite eine bezüglich der Kokillenachse (m) konzentrische, ringnutförmige Ausnehmung aufweisen, so dass nach dem Zusammenfügen der beiden Kokillenelemente (20, 30) ein ringförmiger Hohlraum, der Schmiermittelverteilerring (40), zur Aufnahme von Schmiermittel gebildet wird.
- Kokille nach Anspruch 8, dadurch gekennzeichnet, dass der Schmiermittelverteilerring (40) zuflusseitig und austrittsseitig mit ringförmigen Dichtungsmittel (44), die zwischen die Innnehülse (30) und den Tragkörper (20) zu liegen kommen, abgedichtet wird.
- Kokille nach Anspruch 8, dadurch gekennzeichnet, dass der Schmiermittelverteilerring (40) über eine Vielzahl von in die Innenhülse (30) eingelassene Schmiermittelkanäle (42) mit der zuflusseitigen Stirnfläche (48) der Innenhülse (30) in Verbindung steht, und der Schmiermittelverteilerring (40) mit wenigstens einem, vorzugsweise 1 bis 4, in den Tragkörper (20) eingelassenen Schmiermittelfüllkanälen (43) für die Zufuhr von Schmiermittel aus einer externen Schmiermittelversorgung verbunden ist, wobei der Anschluss des Schmiermittelfüllkanales (43) an die externe Schmiermittelversorgung vorzugsweise an der zuflusseitigen Stirnfläche des Tragkörpers (20) geschieht.
- Kokille nach Anspruch 10, dadurch gekennzeichnet, dass in einem Querschnitt durch die Innenhülse (30) betrachtet zwei benachbarte Schmiermittelkanäle (42) bezüglich der Kokillenachse (m) jeweils den selben Zentriwinkel von bevorzugt 10 bis 30° -- bezogen auf einen Vollkreis von 360° -- einschliessen.
- Kokille nach Anspruch 10, dadurch gekennzeichnet, dass die zuflusseitige Stirnfläche (48) der Innenhülse (30) eine ringnutförmige Ausnehmung, den Schmiermittelaustrittsring (41), aufweist, welcher die an die zuflusseitige Stirnfläche (48) der Innenhülse (30) mündenden Schmiermittelkanäle (42) miteinander verbindet.
- Kokille nach Anspruch 1, dadurch gekennzeichnet, dass die Innenhülse (30) an ihrer Innenfläche (46) Schmiermittel-Führungsmittel (50), die bevorzugt parallel zur Kokillenachse (m) verlaufen, aufweist.
- Kokille nach Anspruch 13, dadurch gekennzeichnet, dass die Schmiermittel-Führungsmittel (50) parallel zur Kokillenachse (m) verlaufende Rillen (50) darstellen, die zuflusseitig erst nach einer Strecke von 1/4 bis 1/3 der Länge des Kokillenhohlraumes (10) beginnen und sich bevorzugt bezüglich ihrer Rillentiefe und Rillenbreite in Richtung der Austrittöffnung (14) konisch erweitern.
- Verfahren zur Herstellung von Walz- oder Pressbarren durch kontinuierliches Stranggiessen mit einer Kokille nach einem der Ansprüche 7 bis 14, wobei ein schmelzflüssiges Metall oder eine schmelzflüssige Metallegierung, das Stranggussmaterial, durch den formgebenden Kokillenhohlraum (10) der Innenhülse (30) geführt und kontinuierlich Schmiermittel an die zuflussseitige Stirnfläche (48) der Innenhülse (30) geleitet wird, wobei das Schmiermittel vom durch die Zuflussöffnung (12) fliessenden Stranggussmaterial kontinuierlich erfasst und somit eine kontinuierliche Schmierung der gesamten Innenfläche (46) der Innenhülse (30) sichergestellt wird, das Stranggussmaterial an der Innenfläche (46) der Innenhülse (30) einer primären Kühlung unterworfen wird, so dass der aus der Kokille austretende Walz- oder Pressbarren wenigstens in seiner äusseren Randzone in fester Form vorliegt und der Walz- oder Pressbarren nach dessen Austritt aus der Kokille durch eine sekundäre Kühlung mittels Kühlmittelbeaufschlagung weiter gekühlt wird.
- Verfahren nach Anspruch 15 zur Herstellung von Walz- oder Pressbarren mit darin homogen verteilten, primär erstarrten Festteilchen, die aus einzelnen degenerierten Dentriten bestehen, dadurch gekennzeichnet, dass das Stranggussmaterial wenigstens in der ganzen Verfestigungszone kräftig gerührt wird.
- Verfahren nach Anspruch 16, dadurch gekennzeichnet, dass das Rühren des Stranggussmaterials durch eine elektromagnesche Rührvorrichtung geschieht, die ein um die Kokillenachse rotierendes Magnetfeld erzeugt.
- Verfahren nach Anspruch 17, dadurch gekennzeichnet, dass das Rühren mittels einem Stator eines mehrpoligen, beispielsweise zwei-, vier-, oder insbesondere sechspoligen Induktionsmotors geschieht.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH849/95 | 1995-03-24 | ||
CH00849/95A CH689446A5 (de) | 1995-03-24 | 1995-03-24 | Kokille. |
CH84995 | 1995-03-24 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0733420A1 EP0733420A1 (de) | 1996-09-25 |
EP0733420B1 true EP0733420B1 (de) | 2000-08-23 |
Family
ID=4196644
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96810160A Expired - Lifetime EP0733420B1 (de) | 1995-03-24 | 1996-03-14 | Modular aufgebaute Stranggiesskokille |
Country Status (8)
Country | Link |
---|---|
US (1) | US5785112A (de) |
EP (1) | EP0733420B1 (de) |
AT (1) | ATE195677T1 (de) |
CA (1) | CA2171790A1 (de) |
CH (1) | CH689446A5 (de) |
DE (1) | DE59605772D1 (de) |
IS (1) | IS4331A (de) |
NO (1) | NO961167L (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19826522A1 (de) * | 1998-06-15 | 1999-12-16 | Schloemann Siemag Ag | Kokillenwand einer Stranggießkokille |
DE19842674A1 (de) * | 1998-09-17 | 2000-03-23 | Schloemann Siemag Ag | Kokillenwand einer Stranggießkokille |
DE202010009838U1 (de) | 2010-07-03 | 2011-02-24 | Electronics Gmbh Vertrieb Elektronischer Geräte | Entlüftungsblock für Vakuum-Gegendruckverfahren |
EP4260963A1 (de) * | 2022-04-14 | 2023-10-18 | Dubai Aluminium PJSC | Form zum stranggiessen von metallsträngen |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1050029B (de) * | 1952-05-08 | 1959-02-05 | Mayfield Heights Ohio Norman Phillip Goss (V.St.A.) | Zum Stranggießen von Metalien dienende Gießform |
DE2454166A1 (de) * | 1973-11-26 | 1975-05-28 | Metallurgie Hoboken | Gussform |
AU477088B2 (en) * | 1973-12-06 | 1976-06-24 | Craddock Belcher Edward | Improvements in log cabins andother like structures |
SE8001284L (sv) * | 1979-02-26 | 1980-08-27 | Itt | Sett och anordning for att framstella tixotropa metalluppslamningar |
SE8001285L (sv) * | 1979-02-26 | 1980-08-27 | Itt | Anordning for framstellning av tixotropa metalluppslamningar |
EP0060359A1 (de) * | 1981-03-16 | 1982-09-22 | Olin Corporation | Kontinuierliche Schmierung von Giesskokillen |
CH659014A5 (de) * | 1983-05-02 | 1986-12-31 | Getselev Zinovy N | Verfahren und vorrichtung zum kontinuierlichen stranggiessen von metallen. |
CA1275781C (en) * | 1986-05-27 | 1990-11-06 | Guy Leblanc | Modular mould system and method for continuous casting of metal ingots |
US4699200A (en) * | 1986-09-08 | 1987-10-13 | Aluminum Company Of America | Apparatus for casting metal |
US5379828A (en) * | 1990-12-10 | 1995-01-10 | Inland Steel Company | Apparatus and method for continuous casting of molten steel |
US5318098A (en) * | 1992-09-24 | 1994-06-07 | Wagstaff, Inc. | Metal casting unit |
-
1995
- 1995-03-24 CH CH00849/95A patent/CH689446A5/de not_active IP Right Cessation
-
1996
- 1996-03-12 US US08/614,305 patent/US5785112A/en not_active Expired - Fee Related
- 1996-03-14 DE DE59605772T patent/DE59605772D1/de not_active Expired - Fee Related
- 1996-03-14 EP EP96810160A patent/EP0733420B1/de not_active Expired - Lifetime
- 1996-03-14 AT AT96810160T patent/ATE195677T1/de not_active IP Right Cessation
- 1996-03-14 CA CA002171790A patent/CA2171790A1/en not_active Abandoned
- 1996-03-19 IS IS4331A patent/IS4331A/is unknown
- 1996-03-22 NO NO961167A patent/NO961167L/no unknown
Also Published As
Publication number | Publication date |
---|---|
CH689446A5 (de) | 1999-04-30 |
ATE195677T1 (de) | 2000-09-15 |
CA2171790A1 (en) | 1996-09-25 |
DE59605772D1 (de) | 2000-09-28 |
EP0733420A1 (de) | 1996-09-25 |
IS4331A (is) | 1996-09-25 |
NO961167D0 (no) | 1996-03-22 |
US5785112A (en) | 1998-07-28 |
NO961167L (no) | 1996-09-25 |
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