KR19980064532A - Metal strip casting method and apparatus - Google Patents

Abstract

The present invention relates to a twin roll casting method and apparatus for introducing molten metal between a pair of chilled rolls through an elongated delivery nozzle (19) to form a casting pool (68) above the nip (69) between the rolls. And an upwardly open trough having rolls 16 and sidewalls 62, floor 63, and lower outlets 64 rotated to cast the solidification strip 20 discharged downwardly from the nip 69. And a pair of upright flow barrier walls 84 standing up from the floor 63 to define the inner trough channel 85 to accommodate the inflow flow of the melt, the barrier wall 84 prevents direct flow of the inlet melt into outlets 64.

Description

Metal strip casting method and apparatus

The present invention relates to the casting of metal strips, and in particular to casting of strips other than ferrous metals.

Generally, metal strips are continuously cast in twin roll casting machines. The molten metal is introduced between a pair of mutually reversing horizontal casting rolls that cool the metal cell to solidify on the movable roll surfaces and draw it into the nip to produce a solidification strip that is sent down from the nip between the rolls.

Hereinafter, the term nip is used to refer to the general area in which the rolls are located closest to each other. The molten metal is poured from a ladle into a small vessel or a series of small vessels, flowing through a metal delivery nozzle located above the nip and directed to the nip between the rolls, casting the rolls adjacent the top of the nip. A casting pool of molten metal held on the faces is formed. This casting pool is defined between the side plates or dams which are slidably engaged with the ends of the rolls.

Although, in twin cast roll casting machines, they are most successfully applied to non-ferrous metals which solidify rapidly in the cold state, in this case they have defects due to non-uniform solidification at the chilled surfaces of the rolls with high freezing points. There was a problem in applying the technique in the casting of ferrous metals.

Therefore, great care must be taken in the design of the metal delivery nozzle to provide a smooth and uniform flow of melt into and into the casting pool. U.S. Pat.Nos. 5,178,205 and 5,238,050 extend the delivery nozzles to the bottom of the casting pool and merger, so that the kinetic energy of the melt flows downwardly toward the nozzles through the slotted outlets with the bottom of the nozzles submerged. An apparatus for reducing is described.

In the apparatus described in US Pat. No. 5,178,205, the kinetic energy is reduced by a flow diffuser with a plurality of outlets and a baffle located above the diffuser. The melt at the bottom of the diffuser slowly and uniformly moves through the slotted outlet into the casting pool with minimal resistance.

In the apparatus described in US Pat. No. 5,238,050, the streams of molten metal drop and impinge at an acute angle to the inclined face of the nozzle, joining the metal to the side wall face, forming a flow sheet directed to the outlet. In other words, by uniformly and slowly moving from the bottom of the delivery nozzle, the rupture of the casting pool is minimized.

In addition, Japanese Patent Publication No. 5-70537 to Nippon Steel Corporation discloses a delivery nozzle proposed to flow the molten metal evenly and gradually into the casting pool. The nozzle mates with the porous baffle / diffuser such that the kinetic energy is removed from the downward flow of the melt flowing into the casting pool through a series of holes in the side wall of the nozzle.

The holes are inclined in such a way as to longitudinally direct the incoming metal along the casting surfaces of the rolls. In particular, the holes on one side of the nozzle point the inlet metal of the nip in one direction in the longitudinal direction, while the holes on the other side direct the inlet metal to another side, with the aim of creating a smooth and uniform flow along the casting surface while minimizing disturbance of the pool surface. Face in the longitudinal direction.

In addition, as a result of extensive testing programs, the inventors have found that defects in which melt surface prematurely solidifies in areas where the roll surface faces the casting faces of the rolls, commonly known as the 'meniscus' or 'meniscus area' in the pool. I found out the main factors.

In each of these areas, the melt flows toward the adjacent casting surface, and if solidification occurs before the melt is in uniform contact with the roll surface, the metal is depressed, ripple marks, cold shuts. Alternatively, irregular initial heat transfer between the roll and the cell tends to occur due to the occurrence of surface bonds such as tracks.

Previous attempts to attain a very uniform flow of melt into the pool have led to premature solidification as the metal is directed away from the area where the metal initially solidifies to form cell surfaces that become the outer surfaces of the resulting strip. There was a problem of deepening.

Thus, the metal temperature in the surface area of the casting pool between the rolls is significantly reduced than the temperature of the incoming metal. When the melt surface temperature of the pool surface becomes too low in the meniscus area, cracks and 'meniscus marks (marks on the strip due to meniscus solidification if the pool level is uneven) tend to occur very easily. have.

One way to solve this problem is to overheat the inlet melt to a high level so that the inlet metal can cool in the casting pool without reaching the solidification temperature before the melt reaches the casting surfaces of the rolls. It is. However, the present invention takes this problem into account and, of course, becomes a more effective method as it takes a stem to achieve that the incoming melt is discharged relatively quickly by the nozzle directly into the meniscus region of the casting pool, Minimize the tendency of premature freezing of the metal before the molten metal contacts the cast roll surfaces.

This is a more effective way to avoid surface defects than to provide absolute stabilization in the pool and indicates that it is resistant to a certain degree of variation on the pool surface because it solidifies only upon contact with the roll surface.

Embodiments of this approach are described in Japanese Patent Application Laid-Open No. 64-5650 of Nippon Steel Corporation and Australian Patent Application No. 60773/96 of the present applicant.

In order to ensure that the inlet melt is discharged relatively quickly into the meniscus area of the casting pool, it is advisable to employ delivery nozzles with side outlets to deliver the melt from the bottom of the delivery nozzle toward the casting rolls downwards. It is essential.

Thus, it is desired that the delivery nozzle captures the downward falling strip of the melt and provide a stable outward flow of the melt through the lateral outlets with as low disturbance and flow variation as possible.

This requires that the downward kinetic energy of the inlet strip is absorbed and a non-disturbed condition is essentially ensured at the lateral outlets. Moreover, this must be achieved within a very limited space in the lower range of the delivery nozzle without serious restrictions of the flow. Conventional baffle and diffuser devices are not suitable for this purpose, but the present invention can solve this by providing a simple method and means.

1 is a view for explaining the configuration and operation of the twin roll continuous strip casting apparatus according to the present invention.

Figure 2 is a longitudinal sectional view showing the main part of the casting apparatus shown in Figure 1 including the configuration of a metal delivery nozzle according to the present invention.

3 is a longitudinal sectional view showing the main part of the casting apparatus by cutting in the transverse direction in the cross section of FIG.

4 is an enlarged cross sectional view showing adjacent parts of the metal delivery nozzle and the casting rolls;

5 is a side view showing a half segment of the metal delivery nozzle;

FIG. 6 is a plan view of the nozzle segment shown in FIG. 5; FIG.

7 is a longitudinal sectional view showing the delivery nozzle segment.

8 is a perspective view of a delivery nozzle segment;

9 is an inverted perspective view of the nozzle segment.

10 is a cross-sectional view of the delivery nozzle segment along line 10-10 of FIG. 5.

FIG. 11 is a cross sectional view along line 11-11 of FIG. 7;

12 is a sectional view along line 12-12 of FIG.

* Description of the symbols for the main parts of the drawings *

15: casting roll 19: feeding nozzle

61: upward opening suction trough 62: nozzle side wall

63: Trough Floor 64: Slot

65: stream 68: casting pool

70 nozzle end wall 80 flat end wall

81: corner cut lower corner 84: upright flow barrier wall

85: Trough Channel 88: Triple Point Melt Injection Reservoir

91: flat floor 92: inclined side

95: triple point molten metal injection passage 96: outlet

98: inside

The present invention relates to a pair via an elongated metal delivery nozzle disposed above and extending along the nip between the rolls to form a casting pool of molten metal held on top of the nip and defined by the pool defined end closure members at the end of the nip. A method of casting a metal strip by inserting molten metal between chilled casting rolls of a mold and rotating the roll to cast a solidified strip discharged downwardly from the nip, the sidewall extending in the longitudinal direction of the floor and the nip to accommodate the molten metal. And a metal delivery nozzle having an elongated trough having an upper opening, wherein the longitudinal sidewalls of the trough are equipped with lateral outlets through which the melt flows from the trough, and the bottom floor of the trough has an upright flow adjacent to the lateral openings. Barrier walls are provided, and the molten metal flows over the walls to the lateral outlets. In budithimyeo on the trough floor against the barrier walls it includes to flow outward blown out downwardly into the trough between said flow barrier walls and provides a metal cast strip characterized in that formed.

The lateral outlet of the nozzle is preferably in the form of longitudinally spaced openings formed in each longitudinal sidewall of the nozzle.

In addition, the openings preferably have an elongated slot shape. The slots may be closely spaced to facilitate substantially continuous curtain jet streams of melt from the adjacent slotted openings of the delivery nozzle into the casting pool.

The trough of the delivery nozzle may be supplied with a series of discrete free fall streams separated separately in the longitudinal direction of the trough, or with a free fall continuous curtain stream extending along the trough.

The melt may be supplied to the delivery nozzle in a series of discrete free fall streams that are spaced apart in the longitudinal direction of the trough so as to strike the floor of the trough in a laterally aligned position at intervals between the lateral outlets of the nozzle. have.

The upstanding barrier walls also consist of a pair of lateral spaced walls extending along the trough so as to stand up from the floor of the trough to accommodate the incoming flow of the melt and to define an internal channel.

The present invention provides a pair of casting rolls forming a nip therebetween, an elongated metal delivery nozzle disposed upwardly along a nip between casting rolls for delivering the molten metal to the nip, and the molten metal with the metallic delivery nozzle. A metal strip casting apparatus having a distributor disposed above a metal delivery nozzle for supply, comprising: an upwardly open elongated trough having a floor and sidewalls extending in the longitudinal direction of the nip to receive a capacity from the distributor. And the discharge nozzle is equipped with side outlets of longitudinal sidewalls of the trough for flowing molten metal outward from the bottom of the discharge nozzle, and the bottom floor of the trough is provided with upright barrier walls adjacent the side wall openings. And the distributor hits the trough floor and the barry A metal strip casting apparatus is provided that includes being operable to pump a melt downward into the trough between the flow barrier walls so as to flow outwardly against the walls.

The present invention provides an upper open elongated trough having a floor and longitudinally extending sidewalls to receive the melt, and lateral outlets of the trough longitudinal sidewalls to flow the melt outwardly from the bottom of the delivery nozzle and strip A delivery nozzle for delivering molten metal to a casting apparatus, wherein the floor of the trough hits the floor and flows outward into the trough between the flow barrier walls so as to flow outwardly against the barrier walls. And a delivery nozzle, characterized in that upstanding barrier walls are installed adjacent to each other.

DESCRIPTION OF EMBODIMENTS Hereinafter, specific methods and apparatus of the present invention will be described with reference to the accompanying drawings.

The illustrated casting apparatus has a main machine frame 11 stationary on the factory floor 12. The frame 11 supports the carriage 13 for casting horizontally movable between the assembly station 14 and the casting station 15.

The carriage 13 carries a pair of parallel casting rolls 15 so that the molten metal is supplied from the ladle 17 via the distributor 18 and the delivery nozzle 19 during the casting operation.

The casting rolls 16 are water cooled to solidify the cell on the movable roll surfaces and are drawn into the nip between the sols primarily to produce the solidified strip product 20 at the nip outlet. This product may be fed to the first coiler 21 and then transferred to the second coiler 22. A receptacle 23 is mounted on the machine frame adjacent to the casting station, and the melt can be bypassed into this receptacle via an overflow outlet 24 on the distributor.

The roll carriage 13 has a carriage frame 31 mounted by wheels 32 on rails 33 extending along a portion of the main machine frame 11, whereby the roll carriage is 13 is entirely mounted to move along the rails 33.

The carriage frame 31 has a pair of roll carriages 34 on which the rolls 16 are rotatably mounted. Since the carriage 13 is movable along the rails 33 according to the operation of the double acting hydraulic piston and the cylinder unit 39 connected between the drive bracket 40 and the main machine frame of the roll reciprocation, the assembly station It operates to move the roll carriage between the 14 and the casting station 15, and vice versa.

The casting rolls 16 are opposedly rotated through the drive shafts 41 based on the transmission mounted on the electric motor and the carriage frame 31. The rolls 16 are installed in a series of longitudinal directions in which cooling water is supplied via the roll end from the water supply ducts of the roll drive shafts 41 connected to the water supply hoses 42 via the rotary glands 43. And outer circumferential walls of copper formed with cooling water passages spaced in the circumferential direction. The rolls can be approximately 500 mm in diameter and up to 2 m long to make a strip product typically 2 m wide.

Ladle 17 belongs entirely to conventional construction and is supported via yoke 45 on an overhead crane that reaches in place from a reservoir of hot metal. A stopper rod 46 operable by a servo cylinder is fixed to the ladle so that the melt flows from the ladle through the discharge nozzle 47 and the fire resistant shroud 48 into the distributor 18.

The distributor 18 has a permeable lining and is formed in the form of a wide plate made of a refractory material such as high cast alumina. One side of the distributor receives the melt from the ladle and is provided with the overflow 24 described above.

The other side of the distributor is provided with a metal outlet 52 having a series of longitudinal spaces. The lower part of the distributor carries mounting brackets 53 for mounting the distributor on the roll carriage frame 31 and a hole for accommodating the splitting pegs 54 on the carriage frame to position the distributor. It is equipped.

The delivery nozzle 19 is formed of two identical half segments made of a refractory material such as alumina graphite occupied from one end to the other end to form a complete nozzle. 5 to 11 show the configuration of the nozzle segments supported on the roll carriage frame by the mounting bracket 60, wherein the side flanges 55 located on the mounting bracket are formed to protrude outward from the top of the nozzle segments. .

Each nozzle half segment is typically trough shaped such that the upper opening suction trough 61 is formed in the nozzle 19 to receive a melt flowing downwardly from the openings 52 of the distributor.

The trough 61 is formed between the nozzle sidewalls 62 and the end walls 70 and positioned transversely between the ends by two flat end walls 80 of the nozzle segments that fit into a complete nozzle. Can be considered.

The lower part of the trough is occluded by the horizontal floor 63 facing the trough sidewalls 62 at the cornered lower corners 81. The nozzle is installed at these lower corners with a series of lateral outlets in the form of longitudinally spaced elongated slots 64 which are regularly spaced longitudinally along the nozzle. Slots 64 are typically positioned to provide an outlet of the melt from the trough to the level of the trough floor 63.

According to the present invention, a pair of upright flow barrier walls 84 are left in the floor 63 of the nozzle trough 61 adjacent to the slots 64. The walls 84 extend continuously throughout the length of the trough 61 to form the inner trough channel 85 to accommodate the inlet flow of the melt as described below.

Outer ends of the nozzle segments are provided with end features, denoted by a sign 87, extending outward beyond the nozzle end wall 70 and where the 'triple point' region of the pool, ie the two rolls and the side dam plates are joined. Metal flow passages are provided to separate the flow of the molten metal into the pool area. The purpose for directing hot metal into this area is to prevent the formation of 'scales' due to premature solidification of the metal in this area, as described in detail in Australian patent application PO2367.

Each end wall forming portion 87 forms a reservoir 88 with a small top opening to receive the melt from the distributor, which is separated from the main trough of the nozzle by the end wall 70. The upper end 89 of the end wall 70 is lower than the upper edge of the trough and the outside of the reservoir 88 and, as will be described in detail below, when the reservoir is overfilled, the main nozzle trough from the reservoir 88 It acts as a weir to return the flow of molten metal to me.

The reservoir 88 is in the form of a shallow dish with a flat floor 91, inclined inner and side edges 92 and 93, and a curved upright outer surface 94. The pair of triple melt injection passages 95 extend outwardly from these reservoirs above the level of the floor 91 to connect with the triple melt injection outlets 96 below the nozzle end forming portions 87. The outlets 96 are inclined downward to discharge the molten metal into the triple point region of the casting pool.

The melt falls from the outlets 52 of the distributor to the bottom of the nozzle trough 61 in a series of free-falling vertical streams 65. Melt flows out from this reservoir through slots 64 to form a casting pool 68 that is retained on top of the nip 69 between casting rolls 16.

The casting pool is defined at the ends of the rolls 16 by a pair of lateral occlusion plates 56 opposed to the ends 57 of the roll. Lateral occlusion plate 56 is a strong refractory material, for example, made of boron nitride. The pair of side closure plates 56 are movable by operation of the pair of hydraulic cylinder units 83 to engage the ends of the casting rolls with the side plates to form the end closure members of the molten casting pool. It is mounted to the holders 82.

In the casting operation, the flow of the melt is submerged in the casting pool with the lower end of the delivery nozzle 19 and the two rows of horizontally spaced slots 64 of the delivery nozzle direct the casting pool to a level disposed just below the surface of the casting pool. Controlled to maintain.

The melt typically flows through the slots 64 in two sideward directed jet streams around the casting pool surface, impinging on the cooling surfaces of the roll in the adjacent perimeter of the pool surface. This has been found to minimize the temperature of the melt sent out to the meniscus region of the pool and substantially reduce the formation of cracks and meniscus marks and the like on the molten strip surface.

According to the invention, the streams 65 fall into the inner trough channel 85 to impinge on the floor 63 of the trough 61 between two upright flow barrier walls 84. Thus, the bumping metal will flow outwards against barrier walls that prevent it from flowing directly into the slots 64.

The kinetic energy of the metal is significantly reduced by secondary impingement on the barrier walls 84, whereby the metal is initially confined into the channel 85 but under conditions that flow in a stable state into the slots 64. Flows over (84). In order to effectively reduce the kinetic energy, it is important to form flat floors and vertical side walls in the channel 85 that face sharply formed corner portions to provide a secondary impact effect.

The outlets 52 of the distributor are staggered in the longitudinal direction of the nozzle relative to the slots 64 such that the drop streams 65 impinge on the nozzle floor at a position between the pair of slots 64.

It has been found that the system can be operated to ensure that the casting pool surface rises above the bottom of the delivery nozzle such that the casting pool surface is only above the floor of the nozzle trough and is at the same level as the metal in the trough. Under these conditions, it is possible to ensure a very stable pool condition, and to secure an inactive pool surface when the discharge slots are inclined downward enough.

It is important that the slots 64 are installed at the inner ends of the two nozzle sections. This ensures proper delivery of the melt to the pool around the central partition of the nozzle and avoids the formation of sculls in this area of the pool.

The triple point melt injection reservoirs 88 receive the melt from the two outermost streams 65 falling from the distributor 18. The two outermost holes 52 of the distributor are arranged to accommodate a single stream where each reservoir 88 impinges on the flat floor 91 adjacent to the outer side of the inclined side 92.

The impingement of the molten metal on the floor 88 causes the molten metal to be injected into the outlets 96 to provide a downwardly inwardly inclined spout of hot metal that is spread out across the floor and directed across the side of the side dams. It spreads outward through the passages 95.

The triple point melt injection proceeds to only a shallow wide pool of melt in the respective troughs 88, the height of which is limited to the height of the top 89 of the wall 70. When the reservoir 88 is full, the melt can flow back to the main nozzle trough beyond the wall end 89 and, therefore, the wall end is a weir for controlling the depth of the melt pool in the triple point melt injection feed reservoir 88. acts as a weir. The depth of the pool is more fully fed into the triple melt injection passages to maintain a constant flow to the head, thus achieving a very uniform flow of hot metal through the triple melt injection passages. In such a control flow, proper shaping of the edges of the strip is of paramount importance. Excessive flow through the triple point passages leads to swelling of the edges of the strip, while less flow results in skulls and 'snake egg' defects in the strip.

The lower side 98 of the triple point molten metal injection forming portions 87 is raised onto the surface of the casting pool, so that cooling of the pool surface in the triple point region is prevented. Moreover, the inside 98 is inclined outward. This is desirable to prevent accumulation of slag or other contaminants based on jamming below the nozzle end. Such jamming can lead to gas shutoff, leakage of fumes from the casting pool, and explosion hazard.

The illustrated apparatus is advanced by way of example, and the invention is not limited to the details of such apparatus. In particular, in the present invention, even if the nozzle is reproduced in a better format, the nozzle equipped with the triple melt injection molding portions is not indispensable.

Although it is desirable for the barrier walls 83 to be of uniform height throughout the nozzle length, it is possible to have a wall portion with reduced height between the slot openings, or discontinuous wall portions may be provided along the nozzle. have. Moreover, the flow of the inner trough 85 may be raised or relatively low relative to the remainder of the floor 63 of the nozzle. Such changes can be made without departing from the spirit or scope of the invention, and all combinations of features described are, of course, included in the invention because of all the novel features.

Claims (19)

Elongated metal delivery nozzle retained at the top of the nip and extending upward along the nip 69 between the rolls 16 to form a casting pool of melt defined by the pool defined end closure members 56 at the end of the nip. The molten metal is introduced between the pair of chilled casting rolls 16 via 19, In a method of casting a metal strip by rotating the rolls to cast a solidified strip discharged downward from the nip (69), A metal delivery nozzle having an open elongated trough 61 having sidewalls 62 extending longitudinally of the floor 63 and nip 69 to receive the melt; The longitudinal side walls 62 of the trough 61 are equipped with lateral outlets 64 through which molten metal flows from the trough, The lower floor 63 of the trough is equipped with upright flow barrier walls 84 adjacent the lateral openings 64, The trough between the flow barrier walls 84 to impinge on the trough floor 63 and flow outwardly against the barrier walls 84 before flowing over the walls to the lateral outlets 64. Metal strip casting method characterized in that it comprises being sent down into. The method of claim 1, The side wall openings (64) of the nozzle (19) further comprise forming in the form of longitudinally spaced openings formed in respective longitudinal sidewalls (62) of the nozzle. The method of claim 2, And the openings (64) further comprise different slot shapes. The method of claim 3, wherein The slots 64 are characterized in that they are closely spaced to facilitate substantially continuous curtain jet streams of the melt from the adjacent slotted openings 64 of the delivery nozzle into the casting pool 68. Way. The method of claim 4, wherein The trough (61) of the delivery nozzle (19) further comprises feeding to one or more free fall strips (65). The method of claim 5, The melt is a series of discrete free fall streams separated separately in the longitudinal direction of the trough so as to impinge on the floor 63 of the trough 61 in a laterally aligned position at intervals between the lateral outlets 64 of the nozzle. And to the delivery nozzle (19) to (65). The method according to any one of claims 1 to 6, The upstanding barrier walls 84 further include having a pair of laterally spaced walls that stand up from the floor of the trough and extend continuously along the trough to form an inner channel 85 to receive the inflow flow of the melt. Metal strip casting method characterized in that. A pair of casting rolls 16 forming a nip therebetween, elongated metal delivery nozzles 19 extending upwardly along a nip between casting rolls 16 for delivering melt to said nip, and said metal In the metal strip casting apparatus having a distributor 18 disposed above the metal delivery nozzle for supplying the molten metal to the delivery nozzle, An upwardly open elongated trough 61 having sidewalls 62 extending longitudinally of the nip 69 to receive the melt from the floor 63 and the distributor 18, The discharge nozzle 19 is equipped with side outlets 64 of the longitudinal sidewalls 62 of the trough 61 to flow the molten metal outward from the bottom of the discharge nozzle 19, The lower floor 63 of the trough 61 is equipped with upstanding barrier walls 84 adjacent the lateral wall openings 64, The distributor 18 is struck on the trough floor 63 and is operable to pump melt down into the trough between the flow barrier walls 84 to flow outwardly against the barrier walls 84. Metal strip casting apparatus comprising a. The method of claim 8, And side outlets (64) of the nozzle are formed in the form of longitudinally spaced openings formed in respective longitudinal sidewalls of the nozzle. The method of claim 9, The side outlet (64) is a metal strip casting device, characterized in that the elongated slot form. The method of claim 10, And the slots (64) are spaced apart from each other so as to facilitate a substantially continuous curtain jet strip of melt from the adjacent slots (65) of the delivery nozzle into the casting pool (68). The method according to any one of claims 8 to 11, The distributor (19) is characterized in that the supply of molten metal to the trough of the discharge nozzle in the one or more free-fall stream (65). The method of claim 12, The distributor 19 has a discrete set of melts separated in the longitudinal direction of the trough so as to strike on the floor 63 of the trough in a laterally aligned position at intervals between the lateral outlets 64 of the nozzle. Metal strip casting machine characterized in that a series of outlets (64) are equipped to provide free fall streams (65). The method according to any one of claims 8 to 13, The upstanding barrier walls 84 are a pair of laterally spaced walls that stand up from the floor 63 of the trough 61 to accommodate the inflow flow of the melt and continuously extend along the trough to define the inner channel 85. Metal strip casting apparatus characterized in that provided. An upwardly open elongated trough 61 having a floor 63 and sidewalls 62 extending in the longitudinal direction to receive the molten metal, In the delivery nozzle for sending the molten metal to the strip casting apparatus is provided with lateral outlets 64 of the longitudinal side walls 62 of the trough for flowing the molten metal from the lower portion of the delivery nozzle to the outside. The floor 63 of the trough hits the floor 63 and melt is discharged downward into the trough 61 between the flow barrier walls 84 so as to flow outwardly against the barrier walls 84. Dispensing nozzle, characterized in that the upright barrier walls (84) provided adjacent to the side outlet (64). The method of claim 15, And the lateral outlets (64) of the nozzle are in the form of longitudinally spaced openings formed in respective longitudinal sidewalls (62) of the nozzle. The method of claim 16, The side discharge port (64) is a discharge nozzle, characterized in that the elongated slot form. The method of claim 17, Wherein the slots (64) are closely spaced to facilitate substantially continuous curtain jet streams of the melt from adjacent slots of the delivery nozzle. The method according to any one of claims 15 to 18, The upstanding barrier walls 84 have a pair of lateral spacing walls that stand on the floor 63 of the trough 61 to accommodate the inflow flow of the melt and are continuously extended along the trough to define the inner channel 85. Dispensing nozzle, characterized in that.