JP6036710B2 - Pull-up continuous casting method and pull-up continuous casting apparatus - Google Patents

Description

  The present invention relates to an up-drawing continuous casting method and an up-drawing continuous casting apparatus.

  Patent Document 1 proposes a free casting method as an innovative pull-up type continuous casting method that does not require a mold. As shown in Patent Document 1, after the starter is immersed in the surface of the molten metal (molten metal) (that is, the molten metal surface), when the starter is pulled up, the molten metal follows the starter by the surface film or surface tension of the molten metal. Derived. Here, a casting having a desired cross-sectional shape can be continuously cast by deriving and cooling the molten metal through a shape determining member installed in the vicinity of the molten metal surface.

In a normal continuous casting method, the shape in the longitudinal direction is defined along with the cross-sectional shape by the mold. In particular, in the continuous casting method, since the solidified metal (that is, the casting) needs to pass through the mold, the cast casting has a shape extending linearly in the longitudinal direction.
On the other hand, the shape defining member in the free casting method defines only the cross-sectional shape of the casting, and does not define the shape in the longitudinal direction. Therefore, castings with various shapes in the longitudinal direction can be obtained by pulling up the starter while moving the starter (or shape defining member) in the horizontal direction. For example, Patent Document 1 discloses a hollow casting (that is, a pipe) that is formed in a zigzag shape or a spiral shape instead of being linear in the longitudinal direction.

JP 2012-61518 A

The inventor has found the following problems with respect to the pulling-up-type continuous casting method described in Patent Document 1.
In the pulling-up-type continuous casting method described in Patent Document 1, since the casting cannot be cut while casting, it is necessary to replace the starter for each product. That is, the pulling-up-type continuous casting method described in Patent Document 1 is a so-called batch method, and is expensive because it requires a starter for each product, and is inferior in productivity because it takes time to install the starter for each product. Had the problem.

  The present invention has been made in view of the above, and provides a pull-up type continuous casting method and a pull-up type continuous casting apparatus that do not require replacement of a starter for each product, and are low in cost and excellent in productivity. Objective.

The up-drawing continuous casting method according to one aspect of the present invention is as follows.
A pulling-up-type continuous casting method for producing a casting while pulling up a molten metal held in a holding furnace,
A step of pulling up the molten metal by the first puller through a starter held by the first puller;
A second pulling machine grips the casting being pulled by the first pulling machine;
Fusing the casting between the first and second pulling machines;
The second pulling machine pulls up the molten metal through the casting gripped by the second pulling machine.
In the pulling-up-type continuous casting method according to one aspect of the present invention, a step in which the second pulling machine grips the casting that the first pulling machine pulls up, and the first and second pulling machines. And the step of fusing the casting between the upper machines, it is possible to cut the casting while casting. Therefore, it is not necessary to replace the starter for each product, and the cost is low and the productivity is excellent.

  In the step of pulling up the molten metal by the first pulling machine, it is preferable that the molten metal is pulled up while passing through a shape determining member that is installed on the surface of the molten metal and that defines the cross-sectional shape of the casting. With such a configuration, the casting can be accurately formed.

  After the step of the second pulling machine pulling up the molten metal, the first pulling machine below the second pulling machine is used to lift the casting that the second pulling machine is pulling up. Gripping, the step of fusing the casting again between the first and second pulling machines, and the first pulling up via the casting gripped by the first pulling machine It is preferable that the machine further comprises a step of pulling up the molten metal.

  It is preferable to melt the casting by laser melting. With such a configuration, the casting can be accurately cut.

The up-drawing continuous casting apparatus according to one aspect of the present invention is as follows.
A pull-up type continuous casting apparatus for producing a casting while pulling up a molten metal held in a holding furnace,
A first pulling machine for gripping a starter and pulling up the molten metal through the starter;
A second pulling machine that holds the casting that the first pulling machine is pulling up and pulls the molten metal through the casting;
A fusing part for fusing the casting between the first and second pulling machines.
The pulling-up-type continuous casting apparatus according to an aspect of the present invention includes a second pulling machine that holds the casting that the first pulling machine is pulling up and pulls the molten metal through the casting, The casting can be cut while casting because it includes a fusing part for fusing the casting between the first and second pulling machines. Therefore, it is not necessary to replace the starter for each product, and the cost is low and the productivity is excellent.

  It is preferable to further include a shape defining member that is installed on the surface of the molten metal and that defines a cross-sectional shape of the casting, and the molten metal is pulled up while passing through the shape defining member. With such a configuration, the casting can be accurately formed.

It is preferable that the fusing part cuts the casting by laser fusing. With such a configuration, the casting can be accurately cut.
In particular, the fusing part includes a first laser processing head slidably connected to the first pulling machine and a second laser processing head slidably connected to the second pulling machine. It is preferable to comprise. With such a configuration, the position control of the laser processing head is simple.

  According to the present invention, it is possible to provide a pulling-up-type continuous casting method and a pull-up-type continuous casting apparatus that do not require replacement of a starter for each product and are low in cost and excellent in productivity.

1 is a schematic side view of a free casting apparatus according to Embodiment 1. FIG. 3 is a plan view of a shape defining member 102 according to Embodiment 1. FIG. 3 is a flowchart showing a free casting method according to Embodiment 1. It is a side view which shows operation | movement of the 1st pulling machine 107, the 2nd pulling machine 108, and the laser processing head 111. FIG. It is a side view which shows operation | movement of the 1st pulling machine 107, the 2nd pulling machine 108, and the laser processing head 111. FIG. It is a side view which shows operation | movement of the 1st pulling machine 107, the 2nd pulling machine 108, and the laser processing head 111. FIG. It is a side view which shows operation | movement of the 1st pulling machine 107, the 2nd pulling machine 108, and the laser processing head 111. FIG. FIG. 8 is a top view of FIG. 7. It is a side view which shows operation | movement of the 1st pulling machine 107, the 2nd pulling machine 108, and the laser processing head 111. FIG. It is a side view which shows operation | movement of the 1st pulling machine 107, the 2nd pulling machine 108, and the laser processing head 111. FIG. It is a side view which shows operation | movement of the 1st pulling machine 107, the 2nd pulling machine 108, and the laser processing head 111. FIG. It is a side view which shows operation | movement of the 1st pulling machine 107, the 2nd pulling machine 108, and the laser processing head 111. FIG. 6 is a plan view of a shape defining member 102 according to a modification of the first embodiment. FIG. 6 is a schematic side view of a free casting apparatus according to Embodiment 2. FIG.

  Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiment. In addition, for clarity of explanation, the following description and drawings are simplified as appropriate.

(Embodiment 1)
First, with reference to FIG. 1, the free casting apparatus (pull-up type continuous casting apparatus) according to Embodiment 1 will be described. 1 is a schematic side view of a free casting apparatus according to Embodiment 1. FIG. As shown in FIG. 1, a free casting apparatus according to Embodiment 1 includes a molten metal holding furnace 101, a shape defining member 102, a support rod 104, an actuator 105, a cooling gas nozzle 106, a first pulling machine 107, and a second pulling apparatus. Machine 108, laser oscillator 109, optical fiber 110, and laser processing head 111. In FIG. 1, the molten metal holding furnace 101 and the shape determining member 102 are cross-sectional views.
Also, as a matter of course, the right-handed xyz coordinates shown in the following drawings are for convenience in explaining the positional relationship of the constituent elements. The xy plane in the following drawings constitutes a horizontal plane, and the positive z-axis direction is upward in the vertical direction.

  The molten metal holding furnace 101 accommodates a molten metal M1 such as aluminum or an alloy thereof, and holds the molten metal M1 at a predetermined temperature having fluidity. In the example of FIG. 1, since the molten metal is not replenished to the molten metal holding furnace 101 during casting, the surface of the molten metal M1 (that is, the molten metal surface) decreases as the casting progresses. On the other hand, the molten metal may be replenished to the molten metal holding furnace 101 at any time during casting to keep the molten metal surface constant. Here, when the set temperature of the molten metal holding furnace 101 is raised, the position of the solidification interface SIF can be raised, and when the set temperature of the molten metal holding furnace 101 is lowered, the position of the solidified interface SIF can be lowered. As a matter of course, the molten metal M1 may be a metal other than aluminum or an alloy thereof.

  The shape defining member 102 is made of, for example, ceramics or stainless steel, and is disposed on the molten metal M1. The shape defining member 102 defines the cross-sectional shape of the casting M3 to be cast. The casting M3 shown in FIG. 1 is a solid casting (plate material) having a horizontal cross section (hereinafter referred to as a transverse cross section) having a rectangular shape. Of course, the cross-sectional shape of the casting M3 is not particularly limited. The casting M3 may be a hollow casting such as a round pipe or a square pipe.

In the example of FIG. 1, the main surface (lower surface) on the lower side of the shape defining member 102 is disposed so as to contact the molten metal surface. Therefore, it is possible to prevent the oxide film formed on the surface of the molten metal M1 and the foreign matter floating on the surface of the molten metal M1 from entering the casting M3. Further, it is preferable that the shape determining member 102 is easily heated by the molten metal M1.
On the other hand, the lower surface of the shape determining member 102 may be arranged at a predetermined distance (for example, about 0.5 mm) away from the hot water surface. When the shape defining member 102 is arranged away from the molten metal surface, thermal deformation and melting damage of the shape defining member 102 are suppressed, and the durability of the shape defining member 102 is improved.

  FIG. 2 is a plan view of the shape defining member 102 according to the first embodiment. Here, the cross-sectional view of the shape determining member 102 in FIG. 1 corresponds to the II cross-sectional view in FIG. 2. As shown in FIG. 2, the shape defining member 102 has, for example, a rectangular planar shape, and has a rectangular opening portion (a molten metal passage portion 103) having a thickness t <b> 1 × a width w <b> 1 for allowing the molten metal to pass through a central portion. have.

  As shown in FIG. 1, the molten metal M <b> 1 is pulled up following the casting M <b> 3 by its surface film and surface tension, and passes through the molten metal passage portion 103 of the shape defining member 102. That is, when the molten metal M1 passes through the molten metal passage portion 103 of the shape defining member 102, an external force is applied from the shape defining member 102 to the molten metal M1, and the cross-sectional shape of the casting M3 is defined. Here, the molten metal pulled up from the molten metal surface following the casting M3 by the surface film or surface tension of the molten metal is referred to as a retained molten metal M2. Further, the boundary between the casting M3 and the retained molten metal M2 is a solidification interface SIF.

The support rod 104 supports the shape defining member 102.
A support rod 104 is connected to the actuator 105. The shape defining member 102 can be moved in the vertical direction (vertical direction, that is, the z-axis direction) via the support rod 104 by the actuator 105. With such a configuration, the shape determining member 102 can be moved downward as the molten metal surface is lowered due to the progress of casting.

  The cooling gas nozzle (cooling unit) 106 is a cooling unit that blows cooling gas (for example, air, nitrogen, argon, etc.) supplied from a cooling gas supply unit (not shown) onto the casting M3 and cools it. Increasing the flow rate of the cooling gas can lower the position of the solidification interface SIF, and decreasing the flow rate of the cooling gas can increase the position of the solidification interface SIF. The cooling gas nozzle 106 is also movable in the vertical direction (vertical direction, that is, the z-axis direction) and in the horizontal direction (x-axis direction and y-axis direction). Therefore, for example, it is possible to move downward in accordance with the movement of the shape defining member 102 as the molten metal surface decreases due to the progress of casting. Alternatively, the first pulling machine 107 and the second pulling machine 108 can move in the horizontal direction in accordance with the movement in the horizontal direction.

  The first pulling machine 107 is provided with a gripping portion 107a. The gripping portion 107a grips the starter ST or the casting M3 and pulls up the casting M3. The first pulling machine 107 is located on the minus side in the x-axis direction of the casting M3, and holds the casting M3 from the minus side in the x-axis direction. Similarly, the second pulling machine 108 also includes a gripping portion 108a, and the starter ST or the casting M3 is gripped by the gripping portion 108a, and the casting M3 is pulled up. The second pulling machine 108 is located on the plus side in the x-axis direction of the casting M3, and grips the casting M3 from the plus side in the x-axis direction. On the other hand, the first pulling machine 107 and the second pulling machine 108 can also release the gripped starter ST or casting M3. Both the first pulling machine 107 and the second pulling machine 108 are freely movable in the x-axis, y-axis and z-axis directions, and are preferably robot arms, for example.

  In the example of FIG. 1, the starter ST is first gripped by the first pulling machine 107 and the casting M3 is pulled up. By cooling the casting M3 with the cooling gas, the retained molten metal M2 in the vicinity of the solidification interface SIF is solidified sequentially from the upper side (z-axis direction plus side) to the lower side (z-axis direction minus side), thereby forming the casting M3. When approximately one casting M3 is cast, the lower part of the casting M3 is held by the second pulling machine 108. Then, the casting M3 is laser-cut by the laser processing head 111 in the vicinity of the upper portion of the second pulling machine 108. As a result, the casting M3 held by the first pulling machine 107 is separated as a product. Here, casting can be continued by the second pulling machine 108.

  Increasing the pulling speed by the first pulling machine 107 and the second pulling machine 108 can increase the position of the solidification interface SIF, and decreasing the pulling speed can decrease the position of the solidification interface SIF. Further, the longitudinal shape of the casting M3 can be freely changed by pulling up the first pulling machine 107 and the second pulling machine 108 while moving in the horizontal direction (x-axis direction and y-axis direction). . Instead of moving the first pulling machine 107 and the second pulling machine 108 in the horizontal direction, the shape defining member 102 is moved in the horizontal direction so that the longitudinal shape of the casting M3 can be freely changed. Also good.

  Here, in order to obtain a casting M3 having excellent dimensional accuracy and surface quality, the solidification interface SIF is held at an appropriate position (height). That is, casting is performed in a state where the solidification speed and the pulling speed at the solidification interface SIF are substantially balanced. From the viewpoint of productivity, the higher the pulling speed, the better. However, even if only the pulling speed is increased while the solidification speed is constant, the solidification interface SIF rises and the retained molten metal M2 is broken. In order to increase the solidification rate (lower the solidification interface SIF), as described above, the cooling gas amount may be increased or the molten metal temperature may be decreased.

  The laser processing head (melting part) 111 is scanned in the x-axis direction at a height between the first pulling machine 107 and the second pulling machine 108. The casting M3 can be fused with high accuracy by the laser beam LB (see FIG. 8) emitted from the laser processing head 111. When fusing, it is preferable that the laser processing head 111 is also movable in the z-axis direction in accordance with the casting speed. The casting M3 can be melted horizontally.

  The laser beam LB is generated by the laser oscillator 109 and emitted from the laser processing head 111 via the optical fiber 110. As the laser beam LB, for example, a fiber laser, a YAG laser, or the like can be used.

  In the free casting apparatus according to the first embodiment, laser fusing is used as a method for cutting the casting M3, but non-contact cutting such as gas fusing and arc fusing can also be used. However, from the viewpoint of fusing accuracy, it is preferable to use laser fusing. Moreover, in order to suppress the vibration given to the holding molten metal M2, it is preferable to use non-contact cutting as a cutting method of the casting M3.

  The free casting apparatus according to Embodiment 1 includes a second pulling machine 108 in addition to the first pulling machine 107. Furthermore, a laser processing head 111 capable of fusing the casting M3 is provided. Therefore, it is possible to melt the casting M3 while continuing casting to obtain a product. That is, the free casting apparatus according to Embodiment 1 does not need to replace the starter for each product, can save the starter and its installation time, and is low in cost and excellent in productivity. The detailed mechanism about the effect will be described later in the description of the free casting method according to the first embodiment.

Next, the free casting method according to Embodiment 1 will be described with reference to FIGS. FIG. 3 is a flowchart showing the free casting method according to the first embodiment. 4 to 7 and 9 to 12 are side views showing operations of the first pulling machine 107, the second pulling machine 108, and the laser processing head 111. FIG. 8 is a top view of FIG.
First, as shown in FIG. 3, the starter ST is held by one pulling machine (step ST1). In the example of FIG. 4, the starter ST is gripped from the minus side in the x-axis direction by the gripping portion 107 a of the first pulling machine 107. And the front-end | tip part (lower end part) of the starter ST is immersed in the molten metal M1, passing the molten metal passage part 103 of the shape defining member 102.

  Next, as shown in FIG. 3, the starter ST is started to be pulled up at a predetermined speed to cast one product (step ST2). Here, as shown in FIG. 4, even if the starter ST is separated from the molten metal surface, the retained molten metal M2 pulled up from the molten metal surface following the starter ST is formed by the surface film or surface tension. As shown in FIG. 4, the retained molten metal M <b> 2 is formed in the molten metal passage portion 103 of the shape defining member 102. That is, the shape defining member 102 imparts a shape to the retained molten metal M2. As shown in FIG. 5, since the starter ST or the casting M3 is cooled by the cooling gas, the retained molten metal M2 is indirectly cooled and solidifies in order from the upper side to the lower side, and the casting M3 grows. To go.

  Next, as shown in FIG. 3, it is determined whether the cast product is a final product (step ST3). If it is not the final product (NO in step ST3), the lower part of the casting M3 is held by the other pulling machine (step ST4). In the example of FIG. 6, the second pulling machine 108 that has been waiting on the plus side in the x-axis direction of the casting M3 in FIG. doing. The second pulling machine 108 moves in the z-axis plus direction in synchronization with the first pulling machine 107. The position in the z-axis direction gripped by the second pulling machine 108 in the casting M3 is preferably above the cooling unit and as low as possible. The lower the position gripped by the second pulling machine 108, the more the vibration of the retained molten metal M2 when gripped can be suppressed.

  Next, as shown in FIG. 3, the casting M3 is laser blown between the first pulling machine 107 and the second pulling machine 108 (step ST5). Specifically, as shown in FIGS. 7 and 8, the laser processing head 111 waiting at the end of the casting M3 on the minus side in the x-axis direction is scanned in the x-axis plus direction in the vicinity of the upper side of the cooling portion of the casting M3. By doing so, the casting M3 is melted by the laser beam LB. Thereby, as shown in FIG. 9, the first product M31 gripped by the first pulling machine 107 via the starter ST is separated from the casting M3. Although not shown, the starter ST and the product M31 are then released from the first puller 107. For the first product M31, it is necessary to cut off the starter ST.

Next, as shown in FIG. 3, the process returns to step ST2 to cast one product. Specifically, as shown in FIG. 10, the casting M3 is held by the second pulling machine 108, and the casting of the second product is continued.
In step ST4 for the second product, as shown in FIG. 11, the first pulling machine 107 waiting on the minus side in the x-axis direction of the casting M3 in FIG. 10 moves in the plus direction of the x-axis. The vicinity of the upper side of the cooling part of M3 is held by the holding part 107a. The first puller 107 moves in the z-axis plus direction in synchronization with the second puller 108.

  In the next step ST5, as shown in FIG. 12, the laser processing head 111 waiting at the end on the plus side of the casting M3 in the x-axis direction is scanned in the minus direction of the x-axis, thereby causing the casting M3 to move to the laser beam LB. Fusing. As a result, the second product M32 directly held by the second pulling machine 108 is separated from the casting M3. On the other hand, since the casting M3 is held by the first pulling machine 107, casting of the third product is continued. Thus, by alternately using the first pulling machine 107 and the second pulling machine 108, casting can be continued while cutting out the product.

  In FIG. 3, if the cast product is the final product (step ST3 YES), the casting is finished. At this time, the casting speed is increased and the retained molten metal M2 is pulled. Thereby, the final product can be acquired without laser cutting. That is, laser cutting is not necessary for the final product.

  As described above, in the free casting method according to the first embodiment, the casting M3 can be melted while the casting is continued to obtain a product. That is, in the free casting method according to the first embodiment, it is not necessary to replace the starter for each product, the starter and its installation time can be saved, and the cost is low and the productivity is excellent.

(Modification of Embodiment 1)
Next, a free casting apparatus according to a modification of the first embodiment will be described with reference to FIG. FIG. 13 is a plan view of a shape defining member 102 according to a modification of the first embodiment.
Since the shape defining member 102 according to Embodiment 1 shown in FIG. 2 is composed of a single plate, the thickness t1 and the width w1 of the molten metal passage portion 103 are fixed. On the other hand, as shown in FIG. 13, the shape defining member 102 according to the modification of the first embodiment includes four rectangular shape defining plates 102a, 102b, 102c, and 102d. That is, the shape defining member 102 according to the modification of the first embodiment is divided into a plurality of parts. With such a configuration, the thickness t1 and the width w1 of the molten metal passage portion 103 can be changed. Further, the four rectangular shape defining plates 102a, 102b, 102c, and 102d can move in the z-axis direction in synchronization.

As shown in FIG. 13, the shape defining plates 102 a and 102 b are arranged to face each other in the x-axis direction. The shape defining plates 102a and 102b are arranged at the same height in the z-axis direction. The distance between the shape defining plates 102a and 102b defines the width w1 of the molten metal passage portion 103. Since the shape defining plates 102a and 102b can move independently in the x-axis direction, the width w1 can be changed.
In order to measure the width w1 of the molten metal passage portion 103, as shown in FIG. 13, a laser displacement meter S1 may be provided on the shape defining plate 102a and a laser reflecting plate S2 may be provided on the shape defining plate 102b.

Further, as shown in FIG. 13, the shape defining plates 102c and 102d are arranged to face each other in the y-axis direction. The shape defining plates 102c and 102d are arranged at the same height in the z-axis direction. The distance between the shape defining plates 102c and 102d defines the thickness t1 of the molten metal passage portion 103. Since the shape defining plates 102c and 102d are independently movable in the x-axis direction, the thickness t1 can be changed.
The shape defining plates 102a and 102b are disposed so as to contact the upper surfaces of the shape defining plates 102c and 102d.

(Embodiment 2)
Next, a free casting apparatus according to the second embodiment will be described with reference to FIG. FIG. 14 is a schematic side view of the free casting apparatus according to the second embodiment. In the free casting apparatus according to the second embodiment, a laser processing head 111a and a laser processing head 111b are slidably connected to the first pulling machine 107 and the second pulling machine 108, respectively. Since other configurations are the same as those of the free casting apparatus according to the first embodiment, description thereof is omitted.

Specifically, the first puller 107 includes a guide 107b extending in the x-axis direction, and the laser processing head 111a slides on the guide 107b in the x-axis direction. The laser beam is generated in the laser oscillator 109a and emitted from the laser processing head 111a through the optical fiber 110a.
Similarly, the second pulling machine 108 includes a guide 108b extending in the x-axis direction, and the laser processing head 111b slides on the guide 108b in the x-axis direction. The laser beam is generated by the laser oscillator 109b and emitted from the laser processing head 111b via the optical fiber 110b.

  In the free casting apparatus according to the second embodiment, the laser processing heads 111a and 111b slide on the guides 107b and 108b, respectively, so that the casting M3 can be automatically fused horizontally. Therefore, position control of the laser processing heads 111a and 111b of the free casting apparatus according to the first embodiment is simpler than the laser processing head 111 of the free casting apparatus according to the first embodiment.

Note that the present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention.
For example, the present invention can be applied to a pulling-up-type continuous casting method that does not use the shape defining member 102 as long as it is a pull-up-type continuous casting method that uses a starter ST to pull up molten metal. However, it is preferable to use the shape determining member 102 because the casting M3 can be accurately formed.

101 Molten metal holding furnace 102 Shape defining members 102a to 102d Shape defining plate 103 Melt passing part 104 Support rod 105 Actuator 106 Cooling gas nozzle 107 First pulling machine 108 Second pulling machine 107a, 108a Grip part 107b, 108b Guide 109, 109a , 109b Laser oscillators 110, 110a, 110b Optical fibers 111, 111a, 111b Laser processing head LB Laser beam M1 Molten metal M2 Holding molten metal M3 Casting M31, M32 Product S1 Laser displacement meter S2 Laser reflector SIF Solidification interface ST Starter

Claims (6)

A pulling-up-type continuous casting method for producing a casting while pulling up a molten metal held in a holding furnace,
A step of pulling up the molten metal by the first puller through a starter held by the first puller;
A second pulling machine grips the casting being pulled by the first pulling machine;
Fusing the casting between the first and second pulling machines;
The second pulling machine pulls up the molten metal through the casting gripped by the second pulling machine,
In the step of the first pulling machine pulling up the molten metal,
A pulling- up- type continuous casting method in which the molten metal is pulled up while passing through a shape determining member that is installed on the surface of the molten metal and that defines a cross-sectional shape of the casting. After the step of the second pulling machine pulling up the molten metal,
A step of the first pulling machine gripping the casting that the second pulling machine is pulling up, below the second pulling machine;
Fusing the casting again between the first and second pulling machines;
The first puller pulls up the molten metal through the casting gripped by the first puller; and
The pulling-up-type continuous casting method according to claim 1 . Fusing the casting by laser fusing,
The pulling-up-type continuous casting method according to claim 1 or 2 . A pull-up type continuous casting apparatus for producing a casting while pulling up a molten metal held in a holding furnace,
A first pulling machine for gripping a starter and pulling up the molten metal through the starter;
A second pulling machine that holds the casting that the first pulling machine is pulling up and pulls the molten metal through the casting;
A fusing part for fusing the casting between the first and second pulling machines;
A shape determining member that is installed on the surface of the molten metal and that defines a cross-sectional shape of the casting,
A pulling- up- type continuous casting apparatus that pulls up the molten metal while passing the shape determining member . The fusing part fusing the casting by laser fusing,
The up-drawing continuous casting apparatus according to claim 4 . The fusing part is
A first laser processing head slidably coupled to the first puller;
A second laser processing head slidably coupled to the second puller,
The up-drawing continuous casting apparatus according to claim 5 .

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