JPS6147622B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for direct chill casting of metals such as aluminum.

When casting metal in this manner, a mass of molten metal is introduced into a casting space at the upper open end of a support member that is supported by a telescoping support at its discharge end; The molten metal body is rapidly cooled and solidified, during which time the mold and the supporting body move relative to each other toward the ends of the casting space, so as to elongate the metal body formed by the molten metal. The lump of molten metal is introduced from an upper opening at one end of the casting space, and since the diameter of this opening is smaller than the peripheral wall of the casting space, the inner peripheral edge of the opening forms an overhang above the mold wall forming the casting space. I will do it. Further, the molten metal mass is introduced into the casting space by continuously filling the opening connected to the casting space with molten metal, so that the molten metal mass expands around the inner peripheral edge of the casting space below the opening. In this case, the meniscus portion formed at the shoulder of the expanded metal mass comes into contact with the peripheral wall of the casting space on the plane of the maximum expansion of the metal. Therefore, the molten metal usually has a medium-thick cross-section between its outer ends, and the intermediate continuity between the plane of maximum expansion and the plane of minimum convergence forms the casting space whose limits are dominated by the peripheral wall. It will have an outer peripheral shape that roughly corresponds to the shape. On the other hand, between the meniscus portion of the metal mass and the enlarged portion of the casting space below the inner periphery of the opening, a spatial pocket is created which is relatively free of metal.

In U.S. Pat. No. 4,157,728, pressurized air is introduced into the pocket through an annular slit around this extension, thereby pressurizing the pocket and lowering the meniscus relative to the peripheral wall of the casting space. It is intended to push down, ie to push down the height of the maximum expansion surface where the meniscus portion contacts the peripheral wall. In addition, oil for lubricating the circumferential wall is allowed to flow from the slit into the pocket, or directly from below the slit to the pocket.

In the present invention, the graphite wall or graphite-like wall-forming member occupies the lower height of the extension and is provided around the molten metal within the peripheral wall of the casting space, so that the intermediate continuous portion provides a rigidity of the member. however, it is surrounded by a fluid-permeable wall, which allows the lubricating oil and an additive fluid medium selected from the group consisting of heated highly volatile liquid media and gaseous media to be transported within said fluid-permeable wall. The oil and the additional fluid medium are simultaneously forced into the wall and discharged into the casting space from a plurality of portions on the inner circumferential surface of the wall facing the intermediate continuous portion. At the same time, the molten metal is cooled and solidified from a region that extends below the intermediate continuous section, and the molten metal and the supporting body that supports it move relatively toward the end of the casting space to elongate the molten metal. derive. On the other hand, the peripheral wall of the casting space uses the smaller opening located at the upper part of the space as the limit surface, and terminates with the part that extends downward and outward to form the limit wall, so that the molten metal that is linearly adjacent to this projecting part is surrounded by the closed corner of the casting space. As a result, the fluid discharged around the intermediate succession forms a fluid ring that flows away from the closed corner of the casting space and in the direction in which the metal mass is guided.

In a number of preferred embodiments of the invention, the fluid flow impinges on the melt at a height below the surface of least focus, and the melt is located between the height of the impingement and the fluid permeable wall. is surrounded by a wall that is impermeable to fluids.

Further, in a preferred embodiment of the invention, the oil and additive fluid medium are forced into the fluid-permeable wall from the outer periphery of the wall. In some embodiments,
For example, the additional fluid medium is a gas, and the oil and gas are forced into the fluid-permeable wall at mutually spaced heights towards the ends of the casting space. Further, in some embodiments, oil and gas are forced into the impermeable wall through a pair of spaced apart peripheral grooves around the wall at the outer periphery of the wall. In some of these embodiments, the grooves have a plurality of sets of holes projecting inwardly around the periphery but terminating in the wall without reaching the inner circumferential surface of the wall.

A mold face consisting of a graphite wall or graphite-like wall-forming member may be provided around the melt at a height such that the portion of the melt directly adjacent to said overhang is also surrounded by a fluid permeable wall. , oil and gas can also be forced into the wall at a height adjacent to its overhang and a height adjacent to the plane of minimum focus, respectively.

Furthermore, the fluid-permeable wall extends beyond the overhang towards the end of the casting space and includes a step oriented inward to the periphery of the wall and forming part of the overhang. and oil is forced into the wall at a level adjacent to this step.

In some embodiments of the invention, the corners are curved on opposite sides of the meniscus portion to control the size of the pocketed melt outlet therebetween.

In this case, the casting space is preferably arranged so that the center of the open ends thereof is on a vertical line.

The invention also relates to related equipment for direct chill casting of metals. This device consists of a molten metal discharge end having a nested support for supporting a metal ingot, and a member forming a casting space with an expansion opening connected to the opening. has a smaller diameter than the circumferential wall, so that the inner circumferential edge of this opening forms an overhang on the circumferential wall. Therefore, when the opening connected to the casting space is continuously filled with molten metal, the mass of molten metal rapidly expands around the inner peripheral edge of the opening, and has a medium-thick cross section between both outer edges. Forming a molten metal body, the intermediate continuity between the maximum expansion surface and the minimum convergence surface has an outer peripheral shape that generally corresponds to the shape of the casting space at the peripheral wall. Means is provided to cool and solidify the molten metal from a plurality of locations below the intermediate continuous section, and a graphite wall or a graphite-like wall forming member connects the intermediate continuous section with a solid but fluid-permeable wall section. It is provided on the peripheral wall of the casting space at a height below the overhang so as to surround it. Further, a fluid feeding member is provided for simultaneously forcing lubricating oil and an additive fluid medium selected from the group consisting of a heated highly volatile liquid medium and a gaseous medium through the fluid-permeable wall. The fluid medium is discharged into the casting space from a wide area on the inner peripheral surface of the wall facing the intermediate continuous section, during which time the molten metal is cooled and solidified, and the molten metal is cooled and solidified. The molten metal moves relatively toward the end of the casting space to elongate the molten metal. As mentioned above, the walls of the casting space are terminated by an overhang delimiting the space, so that the portion of the molten metal directly adjacent to said overhang is surrounded by a closed corner of the casting space. . As a result, the fluid released around the intermediate continuity is
A ring of fluid is formed which flows away from the closed corner of the casting space in the direction of the removal of the metal mass.

Further, as described above and in a number of preferred embodiments, the fluid delivery member forces oil and additional fluid medium from the outer periphery of the fluid permeable wall into the wall. It is possible to operate it as follows. In some embodiments, the fluid delivery member is operable to force oil and gas into the fluid permeable wall from mutually spaced heights endwise relative to the casting space. In some embodiments, a pair of spaced circumferential grooves are disposed around the outer periphery of the wall, and a fluid delivery member is operable to force oil and gas from the grooves into the wall. It is possible. In some embodiments, the groove has a plurality of sets of holes projecting inwardly around the periphery but terminating within the wall without reaching the inner circumferential surface of the wall.

A graphite wall or a graphite-like wall-forming member is provided on the wall of the casting space at such a height that the part of the molten metal directly adjacent to said overhang is also surrounded by said fluid-permeable wall, in which case a fluid supply is provided. The delivery member is operable to force oil and gas into the wall at a height adjacent the bulge and a height adjacent the minimum focusing surface, respectively.

The fluid-permeable wall also includes a step extending toward an end of the casting space beyond the overhang and oriented toward an inward periphery of the wall and forming a part of the overhang. and a fluid delivery member is operable to force oil into the wall at a height adjacent the step.

To reiterate, the above-mentioned corner portion controls the size of the discharge portion which is curved at the opposing surfaces of the meniscus portion and forms a pocket-like shape between them, and the casting space is formed so that the center of the open portions at both ends lies on a vertical line. It is arranged so that

In some preferred embodiments of the invention, the overhang is formed of an insulating and refractory member, and the member and the wall are disposed facing each other at the overhang. In one embodiment, the opening delimiting the casting space is formed by an insulating, refractory cutter for the molten metal, and the cutper is located at the center of the overhang-forming member.

In some preferred embodiments of the invention, the fluid permeable wall is annular and has a cylindrical inner circumferential surface. Additionally, in some other embodiments, the graphite wall or graphite-like wall-forming member is in the form of a peripheral continuous ring of graphite.

The member for cooling and solidifying the molten metal includes a member that causes the fluid flow to collide with the molten metal at a height below the plane of minimum convergence, and the molten metal between the height of the fluid impingement and the fluid permeable wall is caused to It is surrounded by a wall that is impermeable to the air. The diameter of the inner peripheral surface of the fluid permeable wall is smaller than the diameter of the inner peripheral surface of the fluid impermeable wall.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the accompanying drawings, the present billet casting machine mainly includes a cooling box type multi-site casting device 2;
It consists of a hot upper part 4 serving to feed each casting site 6 of the casting apparatus and a set of telescoping stools 8 for supporting the elongated billet 10 which is progressively produced at each site. The casting apparatus consists of a large wide box 12 and correspondingly sized chambers 14 formed within the box for circulating a liquid coolant, such as water, to each casting site. The box 12 is also drilled in its bottom 18 with openings 16 of the same size corresponding in number and location to the casting sites, and in its top with a bottom opening 16 at each site, respectively.
An aperture 20 of the same size and vertically aligned with the aperture 16 is drilled therein. The openings 20 each have an annular groove 40 (see FIG. 3) around their inner periphery, the hanging walls also having a groove at the bottom and an annular shoulder or step thereon. 42 is formed. The bottom openings 16 each include:
A set of screw holes 24 (see Figure 4) spaced around the periphery to achieve the connection described below, and a separate set of screw holes 26 further offset in the radial direction from this.
(See Figure 5). Note that the latter is used when delivering air and lubricating oil to the manufacturing site, as described below.

The hot top 4 is equipped with a hot water distribution pan 32, which is bored with a set of openings 34 designed to hold an equal number of insulating and refractory cutters 28 at each casting site. ing. This opening overlaps the corresponding top opening 20 of the box, but is of smaller diameter and is sized to slidably receive the scooper. Each cutper has a tapered hole 36 and has a cylindrical outer shape with a flange in the center.
The flange portion 38 is sized to fit within the opening 20 of the box. When the dispensing pan 32 is in place, the scooper can be attached to the pan by first inserting the scooper into each bottom opening 16 of the box and then inserting it upwardly into the corresponding top opening 20. Upon passing through the opening 20, the scooper 28 joins within the opening 34 of the distribution pan 32. On the other hand, the flange 38 on the outside of the scupper fits into the opening, leaving only the bottom portion 28' of the scupper hanging into the chamber.

In addition to the box, the casting apparatus is also equipped with a set of annular billet molds 30, which are installed at each site in a similar manner, namely through the bottom opening 16 of the box and upwardly. This is achieved by inserting the However, in this case, the mold is in contact with the upper part 22 of the box, and the hanging part 2 of the scarf
8' and the grooves 40, 42 around the box opening 20. When fitted, the mold forms a seal with the top of the box and traps the flange portion 38 within the opening 20 of the box, as will be described below. The mold also connects to the bottom of the box and forms a hermetic seal therewith, as described below. At the end, hold down screw 4
4 is used to secure the mold in place, using the threaded holes 24 around the opening 16.

Each annular billet mold 30 (FIG. 4) has a deep metal casting ring 46 with a cylindrical interior surface, a shallower and smaller diameter graphite feed ring 48 with a similar cylindrical interior surface, and a cylindrical mold. A relatively flat and small diameter insulating refractory upper ring 50 with a shaped interior surface, a retaining ring 52 used between rings 46 and 50, and an interlockingly operated retaining ring 52 within cast ring 46 as described below. A coolant flow path 56 is inserted between the two.
(See Figure 3). The cast ring is provided with a wide and deeply carved inner circumferential groove 58 in the upper part;
A narrow and shallower groove 60 is provided at the inner peripheral edge of the bottom. Since a screw thread is cut in the upper part of the hanging wall of the wide groove 58, the feeding ring 48 and the upper ring 5
0 are seated in the respective grooves 60 and 58 in this order, the assembly can be secured in place by screwing the retaining ring 52 into the outer circumferential groove 62 on the top surface of the upper ring 50. Furthermore, the upper part of the cast ring is provided with a narrower circumferential groove 64 and an annular groove 66 that is arcuately curved into the corner of the groove; An annular groove 68 in cross section is provided. Each groove 66 and 6
8 is provided with a pair of elastomer O-rings 69 and 70, on the one hand to form a seal between the upper part of the cast ring and the joint surface of the groove 40 in the upper part of the box, and on the other hand to form a seal between the upper part of the cast ring and the joint surface of the groove 40 in the upper part of the box. is adapted to form a seal between the corner of the circumferential groove 64 and the shoulder or step 42 of the box. A small diameter upper ring 50 is also slidably coupled around the periphery of the scupper and, together with the bottom of the scupper, forms a wide protrusion 71 just above the feed ring 48. However, the top ring 50 and the retaining ring 52 do not normally contact the top of the box.

At the bottom, the casting ring 46 is provided with a deep internal circumferential groove 72, the hanging wall 74 of which is somewhat enlarged radially above the part corresponding to the bottom of the chamber 14 upon insertion of the mold. Furthermore, the hanging wall or step 7 of the groove
The upper part of 4 is positioned to shower a cooling liquid curtain around the casting ring and onto the billet emerging from the chamber. The upper portion is also provided with an arcuate recess 76 terminating just short of the inner circumference of the casting ring. At the bottom, the step is provided with a shallow peripheral recess 78, the outer peripheral wall of which is drilled with a series of holes 80 opening into the outer peripheral surface of the ring.

The mounting ring 54 has a larger diameter than the box opening 16 but has a deep circumferential groove 8 around its upper part.
2, so that when the box bottom comes into contact with the flange 84 left facing outward of the mounting ring, the upper part thereof can enter the inside of the hanging wall 74 of the casting ring 46. Alignment holes 86 and 88 drilled in the flange 84 and the bottom of the cast ring 46 allow both rings to
When fitted and abutted inside the flange, it can be fixed using a retaining screw 90. Furthermore, the flange 84 of the mounting ring 54 has a cast ring 46.
A dovetail annular groove 92 is provided on the radius of the joint between the box opening 16 and the box opening 16 to accommodate an O-ring 94 for sealing the joint.

The mounting ring 54 also has a hole 10 in the flange 84.
8 are provided separately, which are spaced symmetrically around the outside of the flange and are connected to the screw holes 2 at the bottom of the box.
This is consistent with 4. When inserting the mold 30 into the box,
The retaining screw 44 is inserted through the hole 108 and screwed into the hole 24 to secure the mounting ring 54 to the box.

The mounting ring 54 has a rounded upper part and has a semi-troid shape corresponding to the shape of the recess 76 in the step of the cast ring 46, but since the radius is smaller than the recess, there are gaps between the two rings. The hanging walls 82 and 74 form an arcuate continuation 56' of the annular coolant channel 56. Mounting ring 5
4 is also recessed at its inner periphery and has a slightly conical recess 96 near its upper end, which is lowered toward a larger diameter recess 98 near the bottom of the ring. be. The recess 96 is sized to have an inner diameter larger than the rounded upper part of the ring, so that the cooling liquid can flow through the inner curved channel 5.
6, 56', each ring 46, 54 is left with a lip 100 and a tip 102 which are free to pour into the virolet. Recess 9
8 is provided with a plurality of symmetrically spaced bottom chamfered ribs 104 which serve as guiding elements for the cap 106 of the associated stool 8, as will be described below.

In addition, both rings 54 and 46 each include:
Four pairs of symmetrically and stepwise cooperating fluid flow channels 110 and 112 (see FIG. 5)
are provided, each of which communicates with one another from one ring to the other,
A pair of circumferential grooves 1 formed in the hanging wall of the ring groove 60
Air and lubricating oil can be supplied to 14 and 116, respectively. Each pair of channels is supplied with fluid by a corresponding number of radially outwardly facing holes 118 drilled in the mouth of the box opening 16, which holes also connect to a threaded hole 26 in the bottom of the box. It also receives fluid supply through the tube. Each channel 110 of the ring 54 has a radially inwardly directed hole 120 in the outer peripheral edge of the flange 84, the inner end of which communicates with a vertical hole 122 on the joint surface of the flange. There is. Each channel 112 of ring 46 has a vertically upwardly directed hole 124 in the bottom of the ring which communicates with an obliquely inwardly directed hole 126 or 126' on the outer circumference of the ring. Every other diagonal inward hole 126 is connected to the groove 114, and the remaining holes 126' are connected to the groove 116. Otherwise, the paired channels 110, 11
Each pair of 2 is the same. This is because holes 118 and 120 in the flange of the box and mounting ring 54 are aligned with the holes 1 for alignment of the box bottom and flange joint surface, respectively.
28 and 130 and are in communication with holes 122 and 12 in flange and ring 46, respectively.
4 are joined to each other between both ends of the flange. Additionally, holes 118, 120, 126 and 126' are sealed at their mouth ends. As a result, when the mold 30 is inserted into the box, the fluid pumped into each hole 26 of the box flows through the paired channels 110, 120.
and into either groove 114 or groove 116 depending on the termination of channel 112 in ring 46.

A feed hose 134 connected to a threaded nipple 136 in each hole 26 supplies each fluid. Further, the holes 130 and 122 are formed by drilling the surface of the flange 84 to form pairs of holes 128, 130 and 122, 12.
A pair of O-rings 132 are seated to seal the joint between the two O-rings 132.

Now, specifically referring to FIGS. 1, 5, and 6, the hot water or molten metal 138 expands after exiting the scrapper 28, and the metal lump, ie, the meniscus portion 140 thereof, exhibits the largest expansion of the metal. The resultant metal mass is such that it comes into contact with the peripheral wall 142 of the cavity 143 of the mold 30 on the plane of the resulting part. Moreover, the metal mass has a cross-sectional shape with a medium diameter profile between the top and bottom of the mold cavity, and the outer periphery of the intermediate continuous portion 144 between the plane of its maximum expansion and the plane of its minimum convergence. The area is approximately the same as the outer periphery of the surrounding wall 142 of the mold cavity. On the other hand, the meniscus portion 140 of the metal lump and the corner portion 71 of the upper surface of the cavity, that is, the opening 20
A pocket 146 is formed having a relatively metal-free space between the peripheral walls 142 of the mold cavity located in a protruding portion directly below the mold cavity.

In the prior art, the pressurized air flow was directed through an annular slit (not shown) provided in the upper corner 71 of the mold cavity.
The oil is pumped into the pocket 146 through the slit, and the oil is fed into the slit through a groove (not shown) opening to the slit, or into a pocket slightly below the slit. The walls 142 of the mold cavity were lubricated by feeding. However, in the present invention, the lubricating oil is transferred to the upper annular groove 1.
16 and pumps a pressurized gas flow, such as air, into the lower annular groove 114 so that oil and gas are simultaneously diffused through the graphite ring 48 and onto the inner circumferential surface of the ring. The peripheral wall 142 of the corresponding cavity discharges the molten metal mass into the mold cavity, while the molten metal mass is quenched and hardened, and the stool 8 is reciprocated relative to the mold 30 in the direction of the vertical axis of said cavity to cool the mass. The body is formed into an elongated billet of metal.

Annular grooves 114 and 116 are typically vertically symmetrical and spaced apart from each other relative to the bottoms of grooves 58 and 60 in casting ring 46. Additionally, each fluid, i.e., oil and air, typically has a
It is pumped against the groove at a pressure of 30 psi. Graphite is commonly manufactured by Union Carbide, Chicago, Noriy.
Use preformed, ultra-fine, nearly flawless, high-strength graphite, such as ATJ graphite sold by Carbon Products Division Corporation. Preferably, the graphite is also precisely machined and has high thermal conductivity.

In FIGS. 1 to 6, the air and oil to be pumped are supplied to a portion of the outer peripheral surface of the graphite feed ring 48, that is, a groove 1.
Sent to 14,116. In FIG. 7, a graphite feed ring 151 has feed holes 151 on its outer circumferential surface.
and 152, the holes communicating with and extending radially inwardly from the corresponding grooves 114 and 116, respectively, and terminating just before the inner circumferential surface 142 of the ring 151. . In this way, each pumped fluid is directed to a location within the body of graphite material where it can be diffused and converted to a smaller radius by the mediated action of the graphite material.

If desired, each set of feed holes can be angled relative to the horizontal plane, such as holes 154 and 156 in FIG. 8, for example. Note that the holes 154 and 156 are sloped upwardly from the grooves 114 and 116, and terminate just before the inner peripheral surface 142 of the ring 157. Additionally, depending on the location of the metal intermediate series 144 from which the shell is formed, the oil and air may not need to be routed to grooves that are above or below each other, respectively. In FIG. 9, the oil is delivered to the lower annular groove 114 and is transferred to a certain height, i.e., by using a steeply sloping hole 158 directed upwards on the outer circumferential surface of a feed ring 159 made of graphite material. It is designed to be fed to a position above the hole 160 for use and equal to the height of the pocket in the cavity of the mold.
On the other hand, the air is directed into the upper annular groove 116, which directs the air to the front end of the air hole 160.

In FIGS. 10 and 11, air is directed into an annular groove 162 formed in the outer circumferential surface of the feed ring 164 itself, which is made of graphite material, and oil is directed in the radial direction of the ring and extends somewhat downward. into a higher groove 166 having an annular sheath-shaped extension 168 . Additionally, the bottom of the upper ring 50' is provided with an annular groove 170 on its outer periphery, and a feeding ring 164 of graphite material is raised into the corner of this groove and forms an annular groove on its underside. dent 17
4 is formed, and its inner circumference is an upper ring 5.
0' so that it is approximately on the same plane as the bottom. Therefore, in this case, the mold surface with which the molten metal spreads into the cavity and comes into contact with it is formed as a vertical cylindrical wall 172 continuous with the recess 174,
In the upper part of the vertical cylindrical wall 172, the front end of the extension 168 of the groove 166 is positioned slightly forward of the swale-shaped recess 174. In the case of this example, the oil is contained in the recess 17.
4 and into the inner vertical cylindrical wall 172 of the feeding ring 164, as in each of the previously described embodiments. The recess 174 that diffuses and supplies oil in this way
By providing the upper portion of the pocket 146, a larger amount of oil vapor can be captured above the pocket portion 146, thereby reducing the cooling effect in this region.

In another embodiment of the invention, the castor oil, peanut oil, or other lubricating oil delivered to either annular groove 116 or 166 is suspended in a highly vaporizable liquid carrier such as alcohol or the like. It's like this. The heat generated in the feed link of graphite material during the casting operation can be used to vaporize the carrier liquid while it pours onto the inner circumferential surface of the ring. The vapor of the carrier liquid then becomes part of the annulus 148 surrounding the metal mass and can also completely replace the gaseous medium normally conveyed to the annular groove 114 or 162, so that in this case There is no need to send gas into these grooves. Alternatively, or as a supplement, the vapor of the carrier liquid may be utilized to modify the gas-vapor properties of the annulus 148 and/or enhance top cooling of the metal mass. can.

Now, referring to FIGS. 12 through 16, the stool cap 106 has a trapezoidal base 176.
resting on and coupled to the upper portion 178 of the base;
When the stool enters the corresponding mold 30, it is allowed to move within certain limits laterally to the base. The base is hollow on the inside and has a tapered skirt 180 around its outside perimeter. The base top also includes an annular groove 182 around its top surface 184, which surface includes a first
As shown in Figure 2, a hookhole-shaped hole 186 is drilled in the upper periphery of the base that communicates with the upper hollow hole 188. The bore 186 is comprised of a circular main portion 190 around the hollow periphery and an adjacent partially circular side portion 192 which is disposed radially inwardly and whose center lies on the vertical axis of the base.

The upper part 193 of the cap is cylindrical and sized to allow for raising and lowering movement within the bore of the casting ring 46. However, the bottom of the cap
4 is enlarged from its upper part, and the mounting ring 5
It is possible to move up and down only within the circle surrounded by the ribs 104 of No. 4. Between these portions of the cap is a shoulder 196 which tapers radially outwardly and downwardly at the same slope as the bottom 104' of the rib. Shoulder part 19
6 is also positioned at a height such that the upper part of the cap abuts the rib bottom 104' before it enters the casting ring, so that the cap is aligned with the casting ring prior to its lifting movement within the ring. state.

As shown in FIG. 13, the cap also includes a wide annular groove 198 in its bottom surface 200, which groove extends into the base 176 when the cap and base 176 are positioned coaxially with each other. Upper part 17
8 is positioned to align with the groove 182 provided in the groove 8. Furthermore, the lower surface 2 of the cap 106
At the center of 00 is a catch member 202 with a flange.
is provided projecting downwardly and is sized so that its flange portion 204 can pass through the main portion 190 of the hole 186 in the base portion 176 . This flange is also located on the lower surface 20 of the cap.
spaced a sufficient distance below 0 so that surfaces 20 of each of cap 106 and base 176
0,184, the upper part 178 of the base 176
A sliding connection can be achieved with the rear surface 208 of the cap 106 such that moving the cap 106 laterally inward relative to the base 176 causes relative axial movement of the members, as described below. can be combined to prevent On the other hand, the shank 206 of the engagement catch member 202 is sized to fit within the side 192 of the hole when the cap 106 is moved.

In addition to the cab 106 and the base 176, the stool 8 includes a ring 210 sized and dimensioned to be slidably coupled to the periphery of the top of the base in the groove 182 of the base 176. There is. Additionally, in this position, the ring 210 is sized such that it is sufficiently above the surface 184 of the base 176 that the cap 106 is coaxial with the surface 184 of the base 176.
When placed on the groove 198 of the cap 106
It is designed so that it can be fitted inside. ring 2
10 is also given an outer diameter so that it can fit into a groove 182 flush with the lower surface 200 of the cap 106, as described below. On the other hand, the annular groove 198 has a much wider groove width than the ring 210, so that when the cap 106 is provided on the base 176 and the ring 210 is aligned with the groove 198, the cap 106 is 21
0 laterally into alignment with the previously described cast member. However, there is only one location where the cap and the cast member abut each other, and this location is where the aforementioned catch member 202 moves to achieve vertical alignment with the main portion 192 of the hole 186 in the upper base. It is located anterior to the area where the

To combine the stool 8, first use the ring 210.
into the groove 198 of the cap 106, the catch member 202 is inserted into the hole 186 of the base 176, and then, while the cap 106 remains on the top of the base 176, move the cap 106 sideways to remove the catch member. The shank part 206 of 202 is attached to the side 19 of the hole.
Just fit it into 2. The ring 210 is then pulled down to join the step 212 of the groove 182, as shown in FIG. In this state, cap 1
06 and base 176 are engaged such that there is no relative axial movement;
can slide laterally of the base 176 on the surface 184 of the base 176 within the limits permitted by the loose fit of the ring 210 and the groove 198.

If it is desired to remove the cap 106 and replace it with a different sized cap, for example, pull the ring 210 up into the groove 198 and slide the cap 106 through the hole 186, as shown in FIGS. Once aligned with the main portion 190 of the cap, the cap can be removed upwardly from the base.

It is clear that the present invention is applicable to the casting of metals with all cross-sectional shapes, including circular, square and rectangular, and to both vertical and horizontal casting, including continuous casting. That's the place. Also, each fluid has a single nipple 1
36 and channels 110, 112 are required.
However, the present invention is capable of various changes and modifications without departing from the scope and spirit of the present invention as described in the claims.

[Brief explanation of the drawing]

FIG. 1 is a partial longitudinal sectional view of a single casting site in which a casting operation is carried out using a liquid-permeable ring made of graphite or the like above the mold cavity. FIG. 2 is a partial cross-sectional top view of the site taken along line 2--2 on FIG. FIG. 3 is a partially enlarged cross-sectional view of the site taken along line 3--3 in FIG. FIG. 4 is a partially exploded cross-sectional view of the site. Figure 5 is line 5 in Figure 2.
FIG. 5 is an enlarged partial cross-sectional view of the site taken longitudinally along -5. FIG. 6 is a further enlarged partial cross-sectional view of the fluid permeable ring portion of the site.
FIG. 7 is a partial sectional view showing a second embodiment of the ring. FIG. 8 is a partial sectional view showing a third embodiment of the ring. Figure 9 shows the fourth part of the ring.
It is a partial sectional view showing an example. FIG. 10 is a partial sectional view showing a fifth embodiment of the ring. FIG. 11 is a partial perspective view of the fifth embodiment. FIG. 12 is an exploded perspective view of the stool used at the site, viewed from above. FIG. 13 is a perspective view of the bottom of the stool cap. 1st
FIG. 4 is a longitudinal sectional side view of the stool when the cap is engaged. FIG. 15 is a longitudinal sectional side view of the stool after the cap has been disengaged. FIG. 16 is a longitudinal sectional side view of the stool after the cap has been removed. 2...Multi-site casting device, 6...Casting device, 8
... Stool, 10 ... Billet, 28 ... Skipper, 30 ... Billet mold, 32 ... Hot water distribution pot, 48 ... Graphite feed ring, 56 ... Coolant flow path, 106 ... Cap, 110 ,112...
Gas flow path, 114, 116... annular groove, 138...
... Molten metal, 140... Meniscus part, 146...
... Pocket portion, 148 ... Ring body formed by fluid, 176 ... Trapezoidal base, 186 ... Hookhole-shaped hole, 202 ... Catch member.

Claims (1)

[Claims] 1. A nested ingot support is provided at the discharge end, the diameter of the open part at the other end is smaller than the peripheral wall of the casting space, and the inner peripheral edge of the open part at the other end is formed by the wall. In a method of directly chill casting metal in a casting space having an open end forming an overhang above the casting space, the open part at the other end of the casting space is continuously filled with molten metal and the mass of molten metal is poured into the other end of the casting space. expanding around the inner circumferential edge of the open portion of the molten metal to form a molten metal having a medium-thick cross section between the two ends in the casting space; a maximum expansion part surface and a minimum convergence surface of the molten metal; The intermediate continuous part between the molds has an outer circumferential shape that roughly corresponds to the shape of the casting space formed by the mold peripheral wall, and the dissimilar lead wall or graphite-like wall forming member is placed at a height below the overhang part of the casting space. a molten metal body in a peripheral wall of the inner wall so that the intermediate continuous section is surrounded by a rigid but fluid-permeable wall of the wall-forming member; a lubricating oil; An additive fluid medium selected from the group consisting of a vaporizable liquid medium and a gaseous medium is simultaneously forced into the fluid-permeable wall section, and the lubricating oil and the additive fluid medium are transferred to the wall section facing the intermediate continuous section. A step of discharging the molten metal into the casting space from a plurality of parts on the inner peripheral surface, simultaneously cooling and solidifying the molten metal from a plurality of parts below the intermediate continuous part, and moving the mold and the ingot support toward the end of the casting space. elongating the molten metal body by moving it relative to the molten metal body; and defining the walls of the casting space together with the overhang at the other end of the space so that the portion of the molten metal directly adjacent to the overhang is The casting space is surrounded by a closed corner, and the fluid released around the intermediate continuous part is formed to form a fluid ring in which the fluid flows away from the closed corner of the casting space in the direction of leading out the ingot. A direct chill casting method of metal characterized by forming. 2. A flow of ejected fluid impinges on the molten metal body at a height below said minimum focusing surface to cool and solidify said molten metal body, and a portion of the molten metal body between said height of impingement and said fluid permeable wall. 2. A method as claimed in claim 1, characterized in that the is surrounded by a wall which is impermeable to said fluid. 3. The method of claim 1, wherein the lubricating oil and additive fluid medium are forced into the fluid-permeable wall from the outer periphery of the wall. 4. The graphite wall or graphite-like wall-forming member is provided around the molten metal body at a height such that the part of the molten metal body directly adjacent to the overhang is also surrounded by the fluid-permeable wall portion, and 2. A method as claimed in claim 1, characterized in that gas is forced into the wall at a height adjacent to the overhang and at a height adjacent to the minimum focusing surface, respectively. 5 The fluid-permeable wall portion extends beyond the overhang toward an end of the casting space, and includes a step portion oriented inward toward the periphery of the wall and forming a part of the overhang. 2. A method as claimed in claim 1, characterized in that the oil is forced into the wall at a level adjacent to the step. 6. A method as claimed in claim 1, characterized in that the corners control the magnitude of the discharge being curved to opposite sides of the meniscus and pocketed between them. 7. The method according to claim 1, wherein the casting space is arranged such that the centers of the open ends thereof lie on a vertical line. 8. Claims characterized in that said additional fluid medium is a gas, and that oil and gas are forced into said fluid-permeable wall at mutually spaced heights towards the ends of the casting space. The method described in Section 3. 9 The oil and gas are forced into the fluid-permeable wall through a pair of spaced peripheral grooves around the outer periphery of the fluid-permeable wall. The method described in Scope Item 8. 10. Claim 9, characterized in that the groove has a plurality of sets of holes projecting inwardly around the periphery but terminating in the wall without reaching the inner circumferential surface of the wall. The method described in. 11. A member forming an open-ended casting space having a discharge end adapted to have a nested ingot support and an opening at the other end, the opening at the other end forming a part of the casting space; The diameter of the opening at the other end is smaller than that of the peripheral wall, and the inner peripheral edge of the opening at the other end forms an overhang on the peripheral wall, and the opening at the other end of the casting space is continuously filled with molten metal, so that the lump of molten metal is The molten metal is expanded around the inner peripheral edge of the open portion at the other end to form a molten metal body having a medium-thick cross section between the two ends, and the intermediate continuity between the maximum expansion part surface and the minimum convergence surface of the molten metal mass is formed. the part has an outer peripheral shape that roughly corresponds to the shape of the casting space in the peripheral wall; a member that cools and solidifies the molten metal from a plurality of parts below the intermediate continuous part; and an intermediate continuous part of the molten metal. a graphite or graphite-like wall-forming member provided on the peripheral wall of the casting space at a height below the overhang to surround the casting space with a rigid but fluid-permeable wall; a lubricating oil; An additional fluid medium selected from the group consisting of a liquid medium and a gaseous medium is simultaneously forced into the fluid-permeable wall section to transfer the lubricating oil and the additional fluid medium to the inner peripheral surface of the wall section facing the intermediate continuous section. A fluid feeding member is provided that discharges fluid into the casting space from a plurality of parts, and between these parts, the molten metal is cooled and solidified, and the mold and the supporting body are relatively moved toward the end of the casting space to elongate the molten metal. The walls of the casting space are marginally defined together with the overhang at the other end of the space, so that the portion of the molten metal directly adjacent to the overhang is surrounded by the closed corner of the casting space, and the intermediate A direct chill casting apparatus for metal, characterized in that the fluid discharged around the continuous part forms a fluid ring in which the fluid flows away from the closed corner of the casting space and in the direction of leading out the ingot. 12. Claim 11, wherein the fluid delivery member is operable to force oil and additional fluid medium into the fluid-permeable wall from the outer periphery of the wall. The device described. 13 The graphite wall or graphite-like wall forming member,
The portion of the molten metal body directly adjacent to the overhang is also provided on the wall of the casting space at a height such that it is surrounded by the fluid permeable wall, and the fluid delivery member carries oil and gas, respectively. 12. The device of claim 11, wherein the device is operable to force flow into the wall at a height adjacent to the overhang and at a height adjacent to the plane of minimum focus. 14 The fluid-permeable wall has a step extending beyond the overhang toward the end of the casting space and forming a part of the overhang, directed inward toward the periphery of the wall. 12. The apparatus of claim 11, wherein the fluid delivery member is operable to force oil into the wall at a height adjacent the step. 15. The closed corner is curved to face the shoulder meniscus of the molten metal expanded in the casting space, and controls the size of the pocket-shaped discharge section therebetween. An apparatus according to claim 11. 16. The apparatus according to claim 11, wherein the casting space is arranged such that the centers of the open ends thereof lie on a vertical line. 17 The overhang portion is formed of a heat insulating fireproof member,
12. Apparatus according to claim 11, characterized in that the member and the mold wall are arranged so as to face each other at an overhang. 18. The device of claim 11, wherein the fluid permeable wall is annular and has a cylindrical inner circumferential surface. 19 The graphite wall or graphite-like wall forming member,
12. The device according to claim 11, characterized in that it has the shape of a peripheral continuous ring of graphite. 20 The member for cooling and solidifying the molten metal includes a member for causing the fluid flow to impinge on the molten metal at a height below the plane of least convergence, and the molten metal is between the height of the fluid impingement and the fluid permeable wall. 12. Device according to claim 11, characterized in that the is surrounded by a wall which is impermeable to the fluid. 21. Claims characterized in that the fluid feeding member is operable to force oil and gas into the fluid-permeable wall from mutually spaced heights toward the ends of the casting space. Apparatus according to clause 12. 22 A pair of spaced circumferential grooves are disposed around the outer periphery of the wall, and the fluid delivery member is operable to force oil and gas into the wall through the grooves. An apparatus according to claim 13. 23. Claim 17, characterized in that the open portion at the other end of the casting space is formed of a heat-insulating, fireproof cutter for a riser, and the cutter is located at the center of the overhang forming member. The device described in. 24. The device of claim 20, wherein the diameter of the inner circumferential surface of the fluid-permeable wall is smaller than the diameter of the inner circumferential surface of the fluid-impermeable wall. 25. Claim 22, characterized in that said groove has a plurality of sets of holes projecting inwardly around the periphery but terminating within said wall portion but not reaching the inner circumferential surface of said wall portion. The equipment described in section.