JPS59212149A - Flat casting apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to casting of molten metal. More details: Planar f)'+l'lJ5
Continuous planar flow chamber a(+)lana, r f lo of 6° metal on casting equipment that can control the stability of the bath paddle (+)addle) and the deterioration of the nozzle in w casting operations)
(casting), the cooling body, which is moving relatively to it, flows from the dead nozzle to it.
- is normal. The casting nozzle is elongated!
:, II' f+4 A pair of lips arranged at right angles to the direction of the moving force of the thread body forming the orifice can be used as a). The bath melting metal is this 1+1ll1%
The water is discharged through an orifice, creating a bath water paddle in the cooling body. The bath water is relative to the nozzle v′cii1
11/) Rapidly solidifies in the gaps carried over the cooling body to form a ribbon, tow, cast filament'f. '1j Nomono Tomoji comparative 'r' with amorphous molecular structure
, 'F, <itell: In the shape of a thin strip or ribbon'', it can be rolled up for use in high-power electrical transformers, for iron cores ↓ for other uses. It has been observed that the stability of the bath paddle is drastically reduced due to the flow of the amorphous yellow alloy, resulting in an uncontrollable H+1 situation./8° Decreased paddle stability. (Due to several factors, including reaction between the metal alloy and the refractory material making up the nozzle, erosion of the nozzle profile, or slag wetting on the outside surface of the nozzle). Each of these factors is compounded by the contact between the molten metal alloy and the refractory material of which the nozzle is made.

It has been suggested in the prior art that nozzle blockage is prevented by forcing the deoxidation product of the aluminized steel out of the mouth of the nozzle. For example, in Voss, US Pat. No. 6,868,798, a live-v manifold is placed in concentric relationship with the nozzle holes of the tongue tissue. An inert gas is added and introduced into the manifold to form a gas layer the entire length of the inner surface of the hole.

The pressurized gas is inert and prevents aluminum slag from adhering to the inner surface of the hole.

C1+db:i' American γ1 Rimo 4,003,56
No. 1 also has a series of baths V+ flj on its outer surface with a nozzle for the bow surface, through which (σ inert gas is supplied to prevent the deposition of deoxidized products. Argon is fed through the permeable wall so that inactive citrates such as
The gas forms a ffjJVc isolation 11 minutes between the steel and the side wall of the passage, and the risk of nozzle blockage is minimized (・('
1-roj: one 9r two use et al.

United States 'l'1 of Hj l deb rand et al.
'i/l 4th, 102,386 The lees are freely falling into the casting mold and the bath ljt',i! 1. A curtain of inert crude gas surrounds the free-falling flow to oxidize the molten metal. It is prevented.

The above teachings of the prior art all require that the inside 7"<1 of the holes extending through the metal or nozzle (11' of the surface)
l: l l is intended for external installation. However, in a flat flow casting operation, it is primarily the outer surface of the nozzle lip that determines the shape of the foil casting or casting. Therefore, the stability of the bath paddle is mainly determined by the relationship between the bath alloy and the casting nozzle.
J between the outer surface of the lip and the outer surface of the lip depends on Q'c.

Therefore, it is an object of the present invention to improve the stability of the molten metal puddle in a plane casting machine. .

Another object of the present invention is to provide a flat υJ casting apparatus for producing cast filaments of uniform thickness and modified quality.

Yet another purpose of the unexploded IJJ is to prevent reactions between the casting nozzle and the molten metal stream passing through it.

Still another object of the present invention is to provide a planar casting apparatus in which erosion of the casting nozzle profile is reduced.

It is another object of the present invention to provide a planar casting apparatus that reduces slag build-up on the exterior surface of the casting nozzle.

Another object of the present invention is to provide a casting nozzle for flat casting operations that has increased durability.

Yet another object of the present invention is to provide a planar casting apparatus that reduces downtime required to change casting nozzles.

Other objects, advantages, and other novel features of the present invention will be set forth in part in the following description, and in part will become apparent to those skilled in the art upon review of the following description, or will be apparent to those skilled in the art upon review of the following description. It may be possible to confirm this by putting the invention into practice. The objects and effects of the present invention will be achieved by means and combinations pointed out in the appended claims.

In order to achieve all of the above and other purposes, and
Pursuant to the objectives of [1], an improved casting apparatus is provided for controlling molten metal puddle stability and nozzle deterioration in planar flow casting operations. . The main unit r1 includes a reservoir for molten metal. The casting nozzle is in fluid communication with the sump for receiving and discharging molten metal from the sump. A cooling body that moves in parallel with the nozzle is placed in close proximity to the nozzle to receive and rapidly cool the ejected metal 1.If the present invention is broadly conceptualized, the molten area JJ1 ejected onto the cooling body is A means is provided for forming a continuous gas barrier to isolate the nozzle from the nozzle, thereby improving the stability of the puddle of molten metal exiting the nozzle.

Another aspect of the invention provides that means for forming a gas barrier layer are present in all the nozzles of at least one manifold for directing an inert gas through the nozzles and isolating the nozzles from the bath metal on the cooling body. This means that they are doing so.

Another feature of the invention is that the nozzle is formed from a porous refractory miceramic, and the manifold is formed from a refractory ceramic that is even more porous than the nozzle.

Another feature of the present invention is that the casting nozzle has an elongated υ[
It has an exit slot.

Among other features of the invention, the casting apparatus includes an inert gas which forms a puddle of molten metal below the bath nozzle and isolates the entire outer surface of the lip from the bath metal on a cooling body. It provides a barrier layer.

According to other features of the present invention, the nozzle has an inner 'fs
VI Relates to a casting device in which a continuous inert gas barrier layer is formed from the bottom of the bath to the outer surface of the lip to completely isolate the lip from the bath molten metal. be.

Among other features, there is provided a casting apparatus in which the entire exterior surface of the nozzle, except for the lip exterior surface, is coated with an inert +/-1 color-proof surface glaze. Be it.

As for the objects and other objects of the invention, we will present and describe preferred embodiments of the invention in such a way as to briefly describe one of the best modes of carrying out the invention. It will be readily apparent to those skilled in the art from the following description. Apparition of fire? It should be noted that other different embodiments of the present invention are possible, and without departing from the present invention, some modifications may be made to the present invention, all within its various obvious features. <1; can also be corrected. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are attached to and constitute a part of this specification, serve to clarify certain features of the invention and, together with the entire description, serve to provide a detailed explanation of the invention.

FIG. 1 (L: support, which also serves as a partial cross-sectional view and fc side view of a casting apparatus constructed according to the present invention.

Figure 2 more clearly shows the molten metal puddle discharged through a pair of spaced lips onto the cooling body, and is an enlarged view of the lower part of the casting nozzle in Figure 1. be.

Preferred embodiments of the present invention will now be described in detail. Examples thereof are illustrated in the accompanying drawings.

Figure 1, which shows a planar flow casting apparatus constructed by the present invention, will be explained. Casting device 10 crucible 1
It has 12 nozzles attached to the bottom of 4. Crucible 14 is heated by an induction coil or the like (not shown) and serves as a reservoir for molten amorphous metal 16 .

Nozzle 12 is preferably made of a porous ceramic material and has a pair of downwardly tapered side walls 18 and 20. Side walls 18 and 20 (l-11, this side wall 18 and 2
a pair of end walls (not shown) arranged at right angles to 0;
The inner bath chamber 22 is combined with the inner bath chamber 22. Internal bath chamber l-16 A relatively wide upper blade Ll that is bent to the pot 14 and l A discharge orifice 26 is provided to discharge all of the molten metal 16. The discharge orifice 26 has a shape extending toward +fti ItC and -(li) 14 in the diagram of FIG. Facing each other at intervals/This 1 pair Nori nozo 2
8 and 60.

The cooling body 62 is disposed in close proximity to the discharge orifice 26 and is adapted to receive and rapidly cool the molten metal 16 exiting the nozzle 12. VC is set to work. In FIG. 1, the cooling body 62 is shown as an endless belt that moves continuously in the direction indicated by the arrow 4.
It will be appreciated that 2 may take other forms, such as an annular cooling roll.

As previously mentioned, the cooling body 62 is located at the bottom of the nozzle 12 and the flow of bath molten metal is assisted by its gravity through the nozzle 12. The flow of molten metal through the nozzle 12 is one! The flow rate may be increased or adjusted by a conventional pressurization system (not shown). Determining the flow rate of molten metal 16, the rate of movement of cooling body 62 relative to the nozzle, and the cooling rate kq:j applied to cooling body 62 is known in the art and is not particularly desirable in normal practice. It is possible to choose that particular value so as to obtain a casting result that

The bath molten metal 16 is discharged through the elongated discharge orifice 26 and forms a molten metal paddle Pk on the surface of the cooling body 62 directly below the nozzle 12. The relatively moving cooling body 32 is the nozzle 1
The bath molten metal is conveyed from the molten metal puddle P along with the molten metal that is solidifying on the surface of the cooling body adjacent to and downstream of the molten metal puddle P. A preferred embodiment provides a cast filament in the form of a continuous strip or ribbon 66.

The outer surfaces 38 and 40 of the lips 28 and 60 define the shape of the molten metal paddle P, respectively, and the resulting cast aIJ bowl 6
It affects the shape of the. In this 11 prior art nozzle, the lips 28 and 60, especially the lip outer surfaces 38 and 40 which are adjacent to the cooling body 2, are in continuous contact with the bath paddle 1). Such contact causes the outer surfaces 6B and 40 of the lips to become constricted, resulting in an unstable bath water bow.And the quality deteriorates.6. ' + l) bo, /66 is generated 'fr 5, especially the lip outer surface 'dxi 38, 40 c'=E out It k-fRIll! Due to the relative movement between the lip and the metal 16, the I·] force increases and the outer shape of the lip begins to erode. .

Additionally, many molten metal alloys, such as the metallic glass alloys of the preferred embodiment, react with the ceramic material when exposed to ambient air, further damaging the lip profile QL.

The outer shape of the lip is influenced by the slag of the ring outer surface 5B and 40, and is also affected by the VC↓.As a result, it is necessary to remove and replace the vI-made nozzle 12:' with V.・Lee-II manufacturing equipment I'/i10'fr is in a state of rest.ItC'lr.

In Fig. 2, it is even clearer that j't 2+ , 1
: The manifolds 42 and 44 are preferably very V.
The structure is made of highly porous refractory ceramic, and is characterized in the broader concept of the invention.
and 60. Manifolds 42 and 44 are on the backside of discharge orifice 26, with manifold 42 located within downstream lip 28, and manifold 4
4 is provided within the lip 60 on the upstream side. Fittings 46 and 48 communicate with manifolds 42 and 44 through conduits or passageways 50 and 52, respectively.

Pressurized inert gas is supplied through the fittings 46 and 48. The inert gas passes through the porous ceramic material of nozzle 12 and is supplied to the lower interior surface of melt chamber 22 and to the interior surface of discharge orifice 26 . Further pressurized inert gas is supplied through the lower outer surfaces 68 and 40 of the lip proximate the cooling body 62.

All of the outer surfaces of the nozzle 12 are ostensibly coated with glaze 54 except for the lip outer surface 68 and 40 which are adjacent to the cooling body filter 2. The surface glaze 54 is impermeable to inert gas and allows the passage of gas through the nozzle between the outer lip surfaces 68 and 4.
0', in a critical area proximate to the discharge orifice 26;
I try to limit it.

After the inert gas passes through the unglazed part of the nozzle 12, the to parts 4',' t(i 1
Aij metal 16 to fillet 11 gas week μ) f layer 56 formation f', 4).

As mentioned above, by providing l knee holds 42 and 44 in the lip 28630, -C non/, +l('l
The gas barrier layer 56 is continuous from the lower part of the molten metal chamber 22 at the nozzle side. In other words, in terms of aCtC, the entire lip structure 1, including the lip outer surfaces 6B and 40, which determines the shape of the molten metal puddle P, is filled 11 from the molten metal 16 by a barrier layer 56 of inert TL gas, and It will be done.

Lip 28 to 30, q! JVC bath bath bal' ＃l
I/) By isolating the contouring lip outer surfaces 38 and 40 from the bath metal 16, many of the degradation mechanisms that contribute to paddle instability are eliminated. , R: Avoid any anti-uniformity between the molten metal 16 and the nozzle 12 19
No. .

Similarly, the lip outer surface m168 and 40 are clogged with slag (=1
It also prevents wear. And, a higher quality T'bo'≦1 ribbon 36 can be obtained.In summary, a number of effects obtained by adopting the concept of the present invention have been described. The casting apparatus of the present invention provides an inert gas barrier layer between the casting nozzle and the molten metal discharged onto the cooling body. In particular, the outer surfaces of the two lips forming the discharge orifice of the nozzle are kept out of contact with the molten metal. As a result, deterioration of the lip outer shape due to frictional wear or reaction with the molten metal can be avoided. Furthermore, wet adhesion of slag to the outer surface of the nozzle can be avoided.

The stability of the melt puddle is therefore increased and the quality of the filament obtained is also improved. Moreover, the frequency of replacing casting nozzles is reduced.

The above description of preferred embodiments of the invention is for illustrative and descriptive purposes. It is not the intention to limit or utilize the invention in its entirety as disclosed. All modifications and changes that are obvious from the above description can be made. The embodiments were chosen and described in order to best explain the principles of the invention and its practical application, and so that those of ordinary skill in the art could adapt it to the particular application contemplated. Various implementations
, I! Mr. J ('This is J...), and with various modifications, it will be possible to make good use of the non-inventive (↓). 'l, jl', request for 'li'
Defined by '+enclosed. .

[Brief explanation of the drawing]

Figure 1 shows a side view of the gluing device i6'' of the present invention.
FIG. 2 is an enlarged view of the -1 direction portion of the VJ nozzle in FIG. 1. 10 - Flat plate flow vj making device 12 - Casting nozzle 14 - Crucible 16... Molten metal 26 - Discharge orifice 28.30 - Lip 62... Cooling body 38, 40 - Lip outer coating surface 42. 44 7 second hold 50. 52... Passage 54... Glaze 56... Gas barrier P ・Bathtub bubble revision applicant Allied Corporation (5 others)

Claims (8)

[Claims] (1) A plane casting device for controlling paddle stability and nozzle deterioration in plane flow metal casting operations, which comprises: (a) a reservoir for bath cutting metal; (b) fluidly connected to the reservoir; (c) A casting nozzle placed in close proximity to the nozzle for receiving and quenching the discharged bath metal, the base of which is relative to the nozzle. (d) means for forming a continuous gas barrier for isolating the nozzle from molten metal on the cooling body;
Plane VJ construction device as a waiting enemy. (2) Means for forming a continuous gas barrier is provided on the cooling body to completely isolate the nozzle from the nozzle q,
A planar casting apparatus as claimed in claim 1, characterized in that it has at least one manifold in the nozzle for discharging the inert gas. 3. The planar casting apparatus of claim 2, further comprising a passageway through the nozzle for supplying inert gas from an external source to the manifold. (4) the nozzle is made of porous refractory ceramic;
2. A planar casting apparatus according to claim 2, wherein the manifold is made of a more porous refractory ceramic than the nozzle. (5) having an elongated evacuation slot for discharging molten metal, said evacuation slot being defined by a pair of spaced apart parallel rubled lips; The plane casting apparatus according to item (1). (6) said molten metal forms a bath puddle below the nozzle as it is discharged from the nozzle, and said gas barrier layer means:
A planar casting apparatus according to claim 5, characterized in that the entire outer surface of the lip is operable to be isolated from molten metal on the cooling body. (7) The nozzle forms an internal molten chamber for supplying molten metal to the discharge slot, and a continuous gas barrier layer forming means generally isolates the molten metal from the lipped molten metal. Claim 5 characterized in that it provides a continuous gas layer from the bottom of the chamber to the outer surface of the lip.
) The plane casting device described in item 1 (9) (8) The model according to claim (7), wherein the entire outer surface of the nozzle, except for the outer lip surface, is coated with a surface glaze that is impermeable to inert gas. Surface casting equipment.