JP4392284B2 - Vertical casting machine for aluminum - Google Patents

Description

  The present invention relates to a vertical casting apparatus for aluminum. In addition, “aluminum” in this specification includes aluminum alloys as well as aluminum.

In many cases, a cast material is used when plastic processing such as extrusion, rolling, forging, or semi-melt molding is performed on an aluminum material. Such a cast material is mainly manufactured by a vertical continuous casting method (DC casting method), but in some cases, a horizontal continuous casting method in which continuous casting is performed along the horizontal direction is also performed.
By the way, aluminum cast material cannot be bent in the horizontal direction from the middle while continuously casting along the vertical direction like steel and copper. For this reason, since the vertical casting method of aluminum can be continuously cast only up to a length of about 6 m, it is generally called a semi-continuous casting method. Therefore, when a large number of castings for each product used for the above processing are required, there is a problem that the productivity is low and the cost is high.
Further, in the case of the horizontal continuous casting method described above, there is a problem that the alloy elements may segregate in the metal structure of the obtained cast material, and the quality is likely to vary.

Thus, the inventors have proposed a highly productive vertical casting apparatus for aluminum, which is obtained by sequentially cutting the aluminum casting material previously cast into vertical shapes into billets in product units ( Japanese Patent Application No. 2003-431758). In addition, in the case of the conventional vertical semi-continuous casting apparatus that does not cut the cast material, casting is performed while pulling the cast material downward in the lower mold, but in the case of the vertical continuous casting apparatus that cuts the cast material, Since the cast material is separated from the lower mold by cutting, the cast material cannot be pulled downward by the lower mold thereafter. Therefore, a feeding means is provided that sandwiches the casting material separated from the lower mold and sends it downward.
However, in the case of a vertical continuous casting apparatus, since a molten aluminum melt is accumulated on the lower mold to a certain extent and the lower mold starts to descend and continuously cast, the tip of the cast material immediately after casting descending from the mold (lower ) The end becomes a convex part having a slightly larger diameter than the original outer diameter. When the convex portion reaches the feeding means, vibration occurs in the cast material, and the vibration is transmitted to the vicinity of the mold. Therefore, the cast material itself bends along the axis (竪) direction, or the peripheral surface near the mold. A large-diameter convex portion is formed on the surface. In addition, the convex portions cause bending and convex portions of the next casting part, and since they gradually increase, the quality of the obtained cast material may be impaired, or the casting itself may be impossible. There was a problem.

Problems to be solved by the invention

  The present invention solves the above-mentioned problems in the background art, and is substantially longer than the case of the conventional semi-continuous casting method without segregation of alloy elements and the like, and can be continuously cast in a vertical pattern along the axial direction. It is an object to provide a vertical casting apparatus for aluminum with high productivity.

Means for Solving the Problems and Effects of the Invention

In order to solve the above-mentioned problems, the present invention has been conceived by the inventors as a result of diligent research and prototyping to lower the cast material immediately after casting descending from the mold together with the lower mold while contacting the guide member. It was made.
That is, aluminum for vertical continuous casting apparatus of the present invention (Claim 1), in the vertical type continuous casting apparatus aluminum, have the same cross-sectional shape as the sectional shape of the cast material that drops from the mold, descend together with the cast material A rod-shaped lower die, a sliding member that slides with the cast material and the peripheral surface of the lower die during casting, and a sliding surface having a V- shaped sliding surface in the vertical direction, and opposed to the sliding member. And a sandwiching member that sandwiches the casting material and the lower mold along the horizontal direction together with the sliding member, and the sliding member is solidified only in the vicinity of the surface layer and the inside thereof is in a semi-molten state. slides peripheral surface of the cast material in the vicinity of certain molds, the clamping member may, or not having a sliding portion which slides the circumferential surface of the upper Symbol cast material and the lower mold, or the cast material and the lower die With one or more clamping rollers that roll in contact with the circumferential surface That, characterized in that.

According to this, even if the cast material descending from the mold has a large-diameter convex portion at its lower end, the sliding member has a V- shaped sliding surface and a clamping member along the horizontal direction. While being sandwiched, they are sequentially corrected so that they pass between the sliding surface of the sliding member and the sandwiching member and approximate the vicinity of the original descending path.
Further, in the form in which the clamping member slides on the cast material and the peripheral surface of the lower mold, the casting material having the sliding portion is opposed to the slide surface having a V-shaped cross section in the slide member. And passing between the sliding surface of the sliding member and the sliding portion of the clamping member while being clamped along the horizontal direction by the sliding portion of the clamping member arranged in a Approximate to the vicinity of the route and sequentially corrected so as to reduce the above-described convex portions and bends . On the other hand, in a mode in which the clamping member is one or a plurality of clamping rollers that roll in contact with the cast material and the peripheral surface of the lower mold, the casting material has a V-shaped cross section in the sliding member. Passing between the sliding surface of the sliding member and the rolling clamping roller while being clamped along the horizontal direction by the sliding surface and one or a plurality of clamping rollers, Approximate to the vicinity of the descending path, and are sequentially corrected so as to reduce the above-described convex portions and bends .
Therefore, since the casting material near the mold is solidified only in the vicinity of the surface layer and the inside is in a semi-molten state, the convex portion is generated by correcting the bending of the casting material by sandwiching the sliding member and the sandwiching member. Reduce the diameter. Therefore, it is possible to continuously cast a cast material having excellent quality with little bending along the axial direction.

The mold used in the vertical vertical casting apparatus for aluminum has a casting hole which is circular or substantially quadrangular (square or rectangular) in plan view and has a diameter that slightly expands downward, and around the casting hole. The cooling water is ejected in a substantially inverted conical shape from the slit hole at the lower corner of the hollow portion provided in the above, and the same applies to the following. Along with the shape of the casting hole, the cross-section of the cast material cast in a vertical pattern is circular or substantially square. Further, the lower mold is configured such that the upper end portion thereof can be inserted into the casting hole of the mold and is lowered together with the cast material to be cast . The same applies to the following .

Further, the present invention, the length along the vertical direction of the sliding surface of the sliding member is longer than the distance between the upper end of the sliding member mold, aluminum for vertical continuous casting apparatus (according Item 2) is also included.
According to this, since the length of the sliding member is longer than the distance between the upper end and the mold (the upper end thereof), the cast material descending from the mold and having the convex portion at the lower end has the primary convex portion described above. When the upper end of the sliding member is reached, a bend occurs in the vicinity of the mold, but it is clamped in the horizontal direction by the opposing clamping member and the sliding member and corrected. Moreover, almost simultaneously with the occurrence of the bending, a secondary convex portion is formed on the cast material located in the vicinity of the casting hole. However, until the secondary convex portion reaches the sliding member, the primary convex portion is formed. Since the portion slides on the sliding surface, a fine gap is generated between the peripheral surface other than the primary convex portion of the cast material and the sliding member. For this reason, the secondary vibration generated when the secondary convex portion reaches the sliding surface is smaller than the primary vibration when the primary convex portion reaches the sliding surface. Since the secondary vibration is small, the bending and the tertiary convex portion induced thereby are small. Except for relatively thick 1 Tsugitotsu portion of the casting early, at the time when the secondary-3 Tsugitotsu unit reaches the sliding surface, the convex portion of the above is sliding the sliding surface, upon reaching of The vibrations that occur are gradually reduced. Therefore, even if the cast material has the primary convex portion at the lower end, the secondary material, the tertiary material, and the n-order material while sliding on the sliding surface while being sandwiched between the sliding member and the sandwiching member. Since it gradually becomes smaller like the convex part and the bending is also reduced sequentially, vertical continuous casting is performed with high quality.

The sliding part has a flat cross section in the vertical direction similar to the sliding surface of the sliding member, or a substantially V-shaped form, or a substantially semicircular side view and a linear shape in plan view. The form to present is included .

Also, the sliding portion is made of such one or more of the metal material, if the singular is desirable length substantially corresponding to the length distance of the sliding surface of the sliding member. On the other hand, in the case of a plurality of sliding portions, it is desirable to arrange them at positions substantially corresponding to the upper and lower portions of the sliding surface of the sliding member.

In the case where there are a plurality of the sandwiching rollers, two of them are in positions substantially corresponding to the upper and lower portions of the sliding surface of the sliding member, and in three or more forms, they are equally spaced or unequal spaced. It is desirable that the sliding member is disposed to face the sliding surface.

Further, the present invention includes a vertical casting apparatus for aluminum (Claim 3 ), wherein the sandwiching roller is a grooved roller or a flat roller.
According to this, the cast material is sandwiched in the horizontal direction by a sliding surface having a V- shaped cross section in the sliding member and one or a plurality of grooved rollers or flat rollers. Passing between the sliding surface and the grooved roller that rolls, etc., in this process, it approximates the vicinity of the original descending path, and is sequentially corrected so as to reduce the above-mentioned convex portions and bends.
The grooved roller has a drum shape or a V- shaped groove on the circumferential surface, and the flat roller has a flat circumferential surface.

In other words, the present invention is effective for reducing the bending of the cast material cast by the vertical continuous casting apparatus including the feeding means for sandwiching the cast material and feeding the cast material downward. This is also effective in reducing the bending of the cast material cast by the vertical continuous casting apparatus that does not include any means .

In the following, the best mode for carrying out the present invention will be described.
FIG. 1 is a vertical sectional view showing a vertical continuous casting apparatus 1 according to an embodiment of the first vertical continuous casting apparatus for aluminum (claims 1, 2, 4 , 5 ) according to the present invention. FIG. It is sectional drawing in the arrow view along the XX line in the inside.
As shown in FIG. 1, the vertical continuous casting apparatus 1 includes a water-cooled mold 2, a cylindrical heat insulating material 6 disposed above the mold 2, and an electromagnetic stirring device 8 surrounding the outside thereof. The mold 2 has a ring-shaped slit hole 5 obliquely downward along the lower corner of the inner casting hole 4, and the cooling water W filled in the hollow portion 3 is formed in a substantially conical shape obliquely downward. Injectable. The casting hole 4 has a circular shape in plan view and slightly increases in diameter toward the bottom. Note that a large number of pores may be formed instead of the five slits.

Moreover, as shown in FIG. 1, the pouring hole 7 of the heat insulating material 6 is concentric and continuous with the casting hole 4, and is a molten aluminum that is poured from a melting furnace, holding furnace, ladle or the like (not shown). m is guided into the casting hole 4 of the mold 2.
Furthermore, as shown in FIG. 1, the electromagnetic stirrer 8 is formed by winding a large number of coils having a circular shape in plan view so as to surround the mold 2 and the heat insulating material 6 and energizing the coils. The molten aluminum m poured into the casting hole 4 is agitated by the force induced by the magnetic field generated at the time. As a result, the solidified structure is divided to have a lot of substantially spherical crystals, and a casting material M suitable for semi-molten metal molding or the like can be obtained. Therefore, the molten metal m becomes a cast material M without segregation of components such as alloy elements.
As shown in FIG. 1, the mold 2 and the like are supported by a building floor (not shown) or the like via a heat-resistant ring 9 having a tapered hole 9 a communicating with the casting hole 4.

As shown in FIG. 1, below the mold 2, a lower mold 28 that can move up and down, and a sliding member 10 and a clamping member 20 that are opposed to each other on both sides of the lifting path are arranged. The lower mold 28 has a circular shape having the same cross section as the cast material M to be cast, and is made of a long bar-like metal along the vertical direction, and is supported by lifting means (not shown). The mold part 29 positioned at the upper end of the lower mold 28 can enter the casting hole 4 of the mold 2 from below as shown in FIG.
As shown in FIGS. 1 to 3, the sliding member 10 is made of steel having a sliding surface 12 having a substantially V-shaped cross section that slides along the lower mold 28 and the peripheral surface of the cast material M to be cast along the vertical direction. Main body 11 and a support body 15 that supports the main body 11 so as to be movable in the horizontal direction. At the upper end of the sliding surface 12, a rounded portion 12 r is formed in order to suppress vibration generated when a convex portion described later reaches the sliding surface 12. Further, the entire sliding surface 12 is covered with chromium plating (not shown) for improving the slidability.

As shown in FIG. 1, a plurality of through holes 18 pass through the support body 15 in the horizontal direction, and nuts 19 are welded to the openings of the through holes 18 on the side opposite to the main body 11. Yes. A bolt 16 whose tip is screwed into the female screw hole 13 opened in the back surface 11 a of the main body 11 and passes through the through hole 18 and screwed into the nut 19 is used when the main body 11 is retracted. On the other hand, the bolt 14 whose tip abuts on the back surface 11 a of the main body 11, penetrates the through hole 18 and is screwed with the nut 19 is used when the main body 11 is advanced. That is, the main body 11 including the sliding surface 12 can be moved by the bolts 14 and 16 so as to approach and leave the lower mold 28 and the cast material M (hereinafter referred to as contact and separation).
As shown in FIG. 1, the length L <b> 1 along the vertical direction of the sliding surface 12 of the main body 11 is set to be longer than the distance L <b> 2 between the upper end of the main body 11 and the upper end of the mold 2.

As shown in FIGS. 1 and 2, the clamping member 20 has a substantially semicircular rolling surface that follows the peripheral surface of the cast material M and the peripheral surface of the lower mold 28, and the upper and lower surfaces that roll in contact with these. A pair of hourglass rollers (clamping rollers) 21 and 22 are provided. The rotating shaft 23 of the hourglass rollers 21 and 22 is pivotally supported by a U-shaped bearing frame 24 in plan view, and the bearing frame 24 is attached to the tip of the piston rod 25 of the hydraulic cylinder 26. That is, the hourglass rollers 21 and 22 are movable so as to be in contact with and away from the lower mold 28 and the cast material M by the forward and backward movement of the piston rod 25.
Below the sliding member 10 and the clamping member 20, a cooling water tank for cooling the casting material M, a feeding means for lowering the casting material M and the lower mold 28, a grip for gripping the casting material M, and the casting material M are provided. Cutting means for sequentially cutting at a predetermined length, pits (both not shown) for receiving the lowered lower mold 28, and the like are arranged.

Here, the vertical continuous casting method using the vertical vertical casting apparatus 1 for aluminum will be described with reference to FIGS. 1 and 4 to 6.
As shown in FIG. 1, the mold part 29 of the lower mold 28 is raised in the casting hole 4 of the mold 2 in advance. In the state immediately before casting, the lower mold 28 penetrates the cooling water tank and is sandwiched between the feeding means. In this state, as shown by the one-dot chain arrow in FIG. 4, molten aluminum m poured from a melting furnace or holding furnace (not shown) is poured into the casting hole 4 of the mold 2. The sliding surface 12 of the main body 11 of the sliding member 10 and the rolling surfaces of the drum-shaped rollers 21 and 22 of the clamping member 20 are the outer surfaces of the lower mold 28 and the original material of the cast material M obtained later. It is arranged in advance at a position where it can contact and roll on the circumferential surface.

The molten aluminum m is cooled by the mold 2 and the lower mold 28 and the cooling water W injected from the hollow portion 3 of the mold 2 through the slit hole 5 while being stirred by the electromagnetic stirring device 8. As a result, as shown in FIG. 4, the molten metal m gradually solidifies from the surroundings to become an aluminum casting material M having a substantially cylindrical shape, and descends while extending downward. At this time, a large-diameter primary convex portion f1 that substantially follows the shape of the casting hole 4 is formed at the lower end (tip) of the cast material M.
Next, as indicated by the solid line and the solid line arrow in FIG. 5, the lower mold 28 and the peripheral surface of the cast material M are in contact with the sliding surface 12 of the main body 11 via the rounded portion 12 r of the sliding member 10. . At that time, the cast material M reaches the upper end of the sliding surface 12 and bends around the vicinity of the mold 2 by the thick diameter of the primary convex portion f1, and the cast material M is located immediately below the mold 2. The secondary convex part f2 arises on a surrounding surface.
Thereafter, the casting material M descends while sliding while only the primary convex portion f1 is in contact with the sliding surface 12, and then faces the rolling surface of the upper drum roller 21 in the clamping member 20 and this. The primary projection f1 of the cast material M reaches the sliding surface 12.

As indicated by the alternate long and short dash line in FIG. 5, when the primary projection f <b> 1 of the cast material M passes between the sliding surface 12 and the drum roller 21, the piston rod 25 moves backward. At this time, the rod 25 is moved backward so that the drum roller 21 does not move away from the cast material M. And if the primary convex part f1 passes, the said rod 25 will be advanced and the drum-type roller 21 will not leave | separate from the casting material M. FIG.
On the other hand, since the primary vibration generated when reaching the upper end of the sliding surface 12 is transmitted to the vicinity of the mold hole 4, a large diameter is formed on the peripheral surface of the cast material M located near the mold hole 4 as shown in FIG. The secondary convex part f2 is formed, and bending (not shown) is generated in the casting material M below the secondary convex part f2. Even if such a bending occurs, the bending of the cast material M is corrected and becomes smaller because it is sandwiched between the sliding member 11 as the guide member and the drum rollers 21 and 22.
The distance between the primary convex part f1 and the secondary convex part f2 approximates the said distance L2 of the upper end of the main body 11, and the upper end of the casting_mold | template 2, and followed the perpendicular direction of the sliding surface 12 of the main body 11. It is shorter than the length L1. That is, the casting material M has the sliding surface 12 of the sliding member 10 as shown by the one-dot chain line and the one-dot chain line arrow in FIG. It descends while sliding.

Further, as indicated by the two-dot chain line and the two-dot chain line arrow in FIG. 5, the cast material excluding the primary convex part f <b> 1 while the primary convex part f <b> 1 is sliding on the sliding surface 12. Since the secondary convex portion f2 reaches the sliding surface 12 in a state where there is a slight gap s between the peripheral surface of M and the sliding surface 12, the secondary vibration generated at that time is the primary vibration. Smaller than. As a result, when the secondary convex portion f2 reaches the sliding surface 12, the tertiary convex portion f3 and the bending generated in the cast material M directly under the mold 2 are reduced.
As shown in FIG. 7, n-th order convex portions fn that are gradually reduced in diameter are formed at substantially equal intervals on the peripheral surface of the cast material M in the above order.

As a result, after passing through the initial state of vertical continuous casting, it is possible to reliably obtain a cast material M having a substantially circular required cross section that approximates the cross sectional shape of the casting hole 4.
As shown in FIG. 8, the lower end of the cast material M corrected to the required cross-section is moved away from the hourglass roller 22 of the clamping member 20 and the sliding surface 12 of the sliding member 10, and is not shown. It is cooled by passing through the cooling water tank, and is further lowered by being pinched by a known feeding means. Then, gripped by the grip, not shown, the cast cast material M descending in a state of being cut at a predetermined length by a cutting means such as a circular saw, not shown, are billet product unit.
In the meantime, the molten aluminum m poured into the casting hole 4 of the mold 2 is continuously cast so as to become a long cast material M having the n-th convex portion fn on the peripheral surface. Therefore, according to the vertical continuous casting apparatus 1, it is possible to manufacture a billet (cast product) having a very small number of convex portions on the circumferential surface and the circumferential direction with high productivity.

FIG. 9 is a schematic plan view showing a holding member 20 ′ having a different form in the vertical continuous casting apparatus 1. Clamping member 20 'includes a cylindrical flat low La (pinching roller) 30, and pivotally supporting the rotary shaft 32 in the bearing frame 24. Rights row La 30 is a plurality arranged in one or vertically flat rows La 30 of flat low la 30 or the uppermost position of the singular is disposed opposite to near the top of the sliding surface 12.

FIG. 10 is a schematic plan view of the vertical continuous casting apparatus 1 including a combination of a holding member 20 ″ having a different form and a sliding member 10 ′ having a different form.
The clamping member 20 ″ includes a grooved roller (clamping roller) 33 having a rolling surface 34 having a substantially V-shaped cross section, and the rotation shaft 35 is pivotally supported by the bearing frame 24. 'Is provided with a sliding surface 12' having a substantially V-shaped cross section on the same main body 11 '. The grooved rollers 33 are arranged singly or plurally, and the single grooved roller 33 or the uppermost position is arranged. The grooved roller 33 is disposed in the vicinity of the upper portion of the sliding surface 12 '. Further, the cast material M' sandwiched between the sandwiching member 20 "and the sliding member 10 'is shown in FIG. Thus, it has a substantially square cross section with rounded corners at the corners. In other words, the casting material M ′ has two sides sliding on the sliding surface 12 ′ of the sliding member 10 ′ and the other two sides contacting the rolling surface 34 of the grooved roller 33, while The same action as the casting apparatus 1 is received.

Figure 11 is a schematic plan view of the vertical continuous casting equipment of reference embodiment comprising a combination of a sliding member 10 'and the clamping member 20' of the reference embodiment.
The sliding member 10 ", rectangular body 11" flat first side surface in which a sliding surface 12 ". Then, as shown in FIG. 11, flat low La (pinching roller) 30 of the clamping member 20 ' , is a plurality arranged in one or vertically flat rows La 30 of flat low la 30 or the uppermost position of the singular is disposed opposite to near the top of the sliding surface 12 ".
12 is a schematic plan view of the vertical continuous casting equipment of different reference embodiment includes a combination of the sliding member 20 'and the clamping member 10'.
Further, FIG. 13 is a schematic plan view of the vertical continuous casting equipment of reference embodiment comprising a combination of clamping member 10a of another Naru form and the clamping member 20 '. As shown in FIG. 13, the clamping member 10a is composed of a pair of bars b1 and b2 extending in the depth direction in the figure, and the peripheral surface thereof is a sliding surface 12a. Note that the bar bn may be three or more.
The length L1 along the vertical direction of the sliding surfaces 12 ', 12 ", 12a of the sliding members 10', 10", 10a shown in Figs. Is set to be longer than the distance L2 between the upper end of the mold 2 and the upper end of the mold 2.

FIG. 14 is a vertical cross-sectional view of the vertical continuous casting apparatus 1 including a combination of the holding member 20a and the sliding member 10 having different forms. As shown in FIG. 14 , the sandwiching member 20a has three sandwiching pieces 37 having a sliding portion 36 which has a semi-circular side view and a rectangular shape (square or rectangular shape) in plan view, which are arranged in the vertical direction. The attached support plate 38 is fixed to the tip of the piston rod 25 of the hydraulic cylinder 26. The uppermost and lowermost clamping pieces 37 are individually opposed to the upper and lower portions of the sliding surface 12.
Also according to the form (corresponding to claims 1 to 3 ), it is possible to obtain the same operation as that of the vertical continuous casting apparatus 1. In addition, it is good also as a form which replaces with the clamping member 20a, and uses the main body 11 which has the sliding surface 12 of the said sliding member 10 together, and clamps the casting material M with a pair of sliding surfaces 12 and 12.

The vertical sectional view which shows the 1st vertical type | mold continuous casting apparatus in this invention. The horizontal sectional view in the arrow direction along the XX line in FIG. The perspective view which shows the principal part of the sliding member used for the said vertical type continuous casting apparatus. Schematic which shows 1 process of a vertical continuous casting method using the said apparatus. Schematic which shows the process following FIG. 4 in the said continuous casting method. The vertical sectional view which shows the behavior of the cast material in the said continuous casting method. FIG. 7 is a vertical sectional view showing the behavior of the cast material following FIG. 6. Schematic which shows the process following FIGS. 5-7 in the said continuous casting method. Schematic which shows the said vertical type continuous casting apparatus of a different form. Furthermore, the schematic which shows the said vertical type continuous casting apparatus of a different form. Schematic which shows the vertical continuous casting apparatus of a reference form . Schematic which shows the vertical type continuous casting apparatus of a different reference form . Schematic which shows the vertical continuous casting apparatus of another reference form . Schematic diagram showing the vertical type continuous casting apparatus further different embodiment.

1 …………………………………… Vertical continuous casting machine 2 ……………………………………… Mold 10, 10 ′… ………………… ...... sliding member 12, 12 '... .................. sliding surface 20,20'~20 ", 20a ... ... clamping member 21,22,30, 33 ... ............ pinching rollers 28 …………………………………… Lower type 36 …………………………………… Sliding part M …………………………………… ... Casting material L1 …………………………………… Length L2 ~ L4 ………………………… Distance

Claims (3)

In aluminum vertical casting equipment,
A rod-shaped lower mold having the same cross-sectional shape as the cast material descending from the mold, and descending together with the cast material;
A sliding member that slides with the cast material and the peripheral surface of the lower mold during casting and has a sliding surface having a V- shaped vertical cross section;
A clamping member that is disposed to face the sliding member and clamps the cast material and the lower mold along the horizontal direction together with the sliding member,
The sliding member slides on the peripheral surface of the cast material in the vicinity of the mold, in which only the vicinity of the surface layer is solidified and the inside is in a semi-molten state
It said clamping members are either having a sliding portion which slides the circumferential surface of the upper Symbol cast material and the lower mold, or one or more clamping rolling contact with the peripheral surface of the cast material and the lower die For rollers ,
A vertical continuous casting apparatus for aluminum. The length along the vertical direction of the sliding surface in the sliding member is longer than the distance between the upper end of the sliding material and the mold,
The vertical casting apparatus for aluminum according to claim 1. The sandwiching roller is a grooved roller or a flat roller.
The vertical casting apparatus for aluminum according to claim 1 or 2 .

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