JP2821971B2 - Insert fixing jig for DFP casting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a DFP casting apparatus for continuously producing copper rough wire from molten copper in one step.
When the molten copper is removed from the crucible due to line trouble, etc., even if the temperature of the entire crucible drops, the soft copper washer can be completely sealed, preventing the insert from oxidizing and melting without allowing air to enter the insert The present invention relates to an insert fixing jig for a DFP casting apparatus that can perform the method.

[0002]

2. Description of the Related Art As conductors of insulated wires and cables,
In the production of copper (copper alloy) wire and copper (copper alloy) stranded wire used as communication lines or transmission and distribution lines, generally, a rough drawing wire is manufactured, and the rough drawing wire is subjected to a desired wire diameter in a drawing process. It is manufactured by drawing. The method for producing the rough drawn wire includes a copper hot rolling method and a continuous casting and rolling method. The continuous casting and rolling method includes an SCR method and a dip forming process. Due to the demand for conductivity, the base metal is moved above the bottom of the crucible containing electrolytic copper obtained by melting in a reducing atmosphere, so that the molten copper adheres to the surroundings to obtain a bare wire of oxygen-free copper.・ Forming method (DF
An immersion molding device (DFP casting device) according to P) is increasingly used.

[0003] This DFP casting apparatus (immersion molding apparatus)
It has a system configuration as shown in FIG. That is,
100 is a DFP casting device, and 110 is a preheating furnace. The preheating furnace 110 is provided with the supplied copper 120.
Is previously heated to a predetermined temperature. A melting furnace 130 melts the electrolytic copper 120 heated to a predetermined temperature in the preheating furnace 110. Reference numeral 140 denotes a holding furnace for temporarily holding the electrolytic copper 120 melted in the melting furnace 130 in a molten state.
150 is a crucible, which quantitatively removes copper 1 from the holding furnace 140.
20 supplies. The holding furnace 140 and the crucible 150 have a configuration as shown in FIG. That is, the holding furnace 140 includes a molten copper introduction chamber (not shown) for introducing and temporarily holding the electrolytic copper 120 melted in the melting furnace 130, a molten copper introduction chamber and the partition plate 14.
The molten copper pressurizing chamber 1 which is partitioned by 2 and is provided adjacent to the molten copper introducing chamber and pressurizes the molten copper at a constant pressure and sends out the molten copper.
41, the upper part is partitioned by the molten copper pressurizing chamber 141 and the partition plate 142, and is provided adjacent to the molten copper pressurizing chamber 141 and the molten copper introducing chamber, and is sent out by pressurization in the molten copper pressurizing chamber 141. Dissolved copper 120 quantitatively in crucible 1
And a molten copper supply chamber 143 for supplying the molten copper to the chamber 50.

[0004] In the molten copper introduction chamber, an introduction pipe (not shown) through which the electrolytic copper 120 melted from the melting furnace 130 is introduced is attached to a side wall. 144 is a molten copper pressurizing chamber 14
Reference numeral 145 denotes a cover attached to the upper part of the cover 1.
It is a gas supply port formed in. This gas supply port 145
Is supplied with an inert gas (specifically, nitrogen gas) at a predetermined pressure into the molten copper pressurizing chamber 141 to push down the molten copper surface to thereby lower the molten electric power in the molten copper pressurizing chamber 141. This is for supplying the copper 120 to the molten copper supply chamber 143 through the lower side of the partition plate 142. Reference numeral 146 denotes a lid, which is a molten copper supply chamber 143.
Attached to the top of the Reference numeral 147 denotes a supply pipe for quantitatively supplying the molten copper 120 in the molten copper supply chamber 143 to the crucible 150. 14
Reference numeral 8 denotes an inductor for holding the molten electrolytic copper 120 supplied from the melting furnace 130 into the holding furnace 140 in a molten state.

[0005] The crucible 150 is made of graphite and constitutes a container for holding a fixed amount of molten copper supplied from the molten copper supply chamber 143 of the holding furnace 140. The core rod wire 160 is passed upward through the molten copper 250 accommodated in the crucible 150, and the molten copper 250 is adhered around the core rod wire 160 to produce the oxygen-free copper cast rod 170. Is what you do. The lower end of the crucible 150 has a configuration as shown in FIG. That is, the periphery of the crucible 150 is refractory 260
Around the refractory 260,
The iron plate 270 is covered. An opening 155 is formed at the lower end of the crucible 150. Reference numeral 300 denotes an adapter which is inserted into the refractory 260 and has a flange 320 formed on an upper portion thereof. The upper part of the inner wall surface of the adapter 300 is provided with a female screw. This adapter 3
00, a hole 310 is formed at the bottom thereof.
10 has the same diameter as the opening 155 of the crucible 150. This adapter 300 has a flange 3
At 20, it is welded to the iron plate 270.

Reference numeral 330 denotes an insert.
The hole 310 is fitted into the opening 155 of the crucible 150 and serves to guide the core rod wire 160 as a seed wire into the crucible 150. The inner diameter of the insert 330 is substantially the same as the outer diameter of the core rod wire 160. The insert 330 is formed in a cylindrical shape having a flange portion 335, and a soft copper washer 340 is interposed between the adapter 300 and the flange portion 335 of the insert 330. The soft copper washer 340 is for sealing between the adapter 300 and the flange 335. Reference numeral 350 denotes an insert contact jig which is formed in a tubular shape and is in contact with the insert 330. A hole 35 formed at the center of this insert contact jig 350
The diameter of 5 is formed to be the same as the inner diameter of the insert 330. Reference numeral 360 denotes a cylindrical body, one end of which is tightly joined to the insert contact jig 350 and the other end of which is closely joined to the cylindrical pressing jig 370.

Reference numeral 370 denotes a cylinder pressing jig.
Is pressed against the lower surface of the insert contact jig 350, and the insert 330 is pressed against the adapter 300 by the insert contact jig 350. Reference numeral 372 denotes a regular hexagonal convex portion, and the convex portion 372 is configured to be able to be bitten by a spanner or the like. Reference numeral 374 denotes a thread portion formed on the outer peripheral surface of the cylindrical pressing jig 370. The screw part 374 is adapted to be screwed into a female screw provided on the upper part of the inner wall surface of the adapter 300.
By turning the cylinder holding jig 370, the cylinder 3
6 can be pushed in or released. By turning the cylinder pressing jig 370 to push the cylinder 360, the insert contact jig 350 presses the flange portion 335 of the insert 330, and the soft copper washer 340 is crushed and sealed by the flange portion 335. This insert contact jig 350
, The cylindrical body 360 and the cylindrical body pressing jig 370 constitute an insert holding jig. Numeral 380 denotes a joint tool, which includes a cylindrical portion 382 and a fixing portion 384 having a thick outer peripheral portion. This fixing portion 384
As shown in FIG. 11, a plurality of holes 386 (three holes in FIG. 11) are provided in the thick portion of FIG. The joint member 380 is tightly fixed to the flange 320 of the adapter 300 by a bolt 390. The cylindrical portion 382 of the joint tool 380 is configured so that the hose 400 that guides the core rod wire 160 as a seed wire can be connected thereto. This insert contact jig 35
0, the cylinder 360, the cylinder holding jig 370, and the joint 380 constitute an insert fixing jig.

In such a configuration, the insert 33
0 with a soft copper washer 340 interposed therebetween,
Insert 3 into opening 155 formed at the lower end of
30 is inserted. Thereafter, the insert contacting jig 350 is brought into contact with the flange portion 335 of the insert 330, and the cylindrical pressing jig 370 is pressed against the insert contacting jig 350 via the cylindrical body 360. 3
70 is screwed into a female screw provided on the upper part of the inner wall surface of the adapter 300, and the cylindrical body pressing jig 370 is turned to push the cylindrical body 360, and the insert contact jig 350 is inserted into the insert 330. Of the soft copper washer 34 by the flange portion 335.
0 is crushed and sealed. Thereafter, when the molten copper 250 at 1120 ° C. to 1160 ° C. is put into the crucible 150,
The heat of the molten copper 250 causes the insert 330 and the insert fixing jig to reach a high temperature and expand. This expansion is absorbed by the collapse of the soft copper washer 340 for sealing, and the opening 155 of the crucible 150 and the insert 3 are inserted.
The seal between them is perfect.

Reference numeral 180 denotes a main drive, which is a crucible 150
For driving the core rod wire 160 to be fed to the. 190 is a shaving head, which is a crucible 150
This is for removing oxides on the surface of the core rod wire 160 to be fed to the core. 200 is a cooling device, which is a crucible 150
To cool the cast rod 170 obtained by adhering molten copper around the core rod wire 160. 210
Is a bull block for guiding the core rod wire 160 from the seed wire storage device 220 holding the core rod wire 160. Reference numeral 230 denotes a rolling mill, and the casting rod 1
This is for rolling 70 to a desired wire diameter.

Accordingly, the core rod wire 160 is sent to the shaving head 190 via the bull block 210 for guiding the core rod wire 160 from the seed wire storage device 220. In the shaving head 190, the oxide on the surface of the core rod wire 160 serving as a seed wire is removed by a shaving die. The core rod wire 160 shaved in this shaving head 190
Is sent to the crucible 150 by the main drive 180. Then, the core rod wire 160 is moved above the bottom of the crucible 150 containing the electrolytic copper melted in the melting furnace 130 in an inert gas atmosphere, so that the molten copper adheres to the surroundings and the oxygen-free copper is cast. Get the rod.

[0011]

In the DFP casting apparatus configured as described above, when a line trouble or the like occurs, it is necessary to once remove all the molten copper filled in the crucible. When all the molten copper filled in the crucible is removed, the temperature of the entire crucible decreases, and the temperature of the insert and the insert fixing jig becomes low and contracts. Moreover, the insert contact jig 350 pressing the insert 330, the cylindrical body 360 pressing the insert abutting jig 350, and the cylindrical pressing jig 370 pressing the cylindrical body 360 contract. . Then, insert 33
0, the contraction of the insert contact jig 350, the cylindrical body 360, and the cylindrical body pressing jig 370 causes looseness between the opening 155 of the crucible 150 and the insert 330, and this looseness causes the opening of the insert 330 and the crucible 150 to be loosened. A gap is created between the part 155 and the insert 330. This gap cannot be absorbed due to the collapse of the soft copper washer 340 of the flange portion 335, and there is a problem that the sealing by the soft copper washer 340 cannot be completed.

According to the present invention, when the molten copper is pulled out of the crucible due to a line trouble or the like, even if the temperature of the entire crucible is lowered, the soft copper washer can be completely sealed, and air does not enter the insert. It is an object of the present invention to provide an insert fixing jig for a DFP casting device in which an insert can prevent oxidative damage.

[0013]

Means for Solving the Problems To achieve the above object, an insert fixing jig of a DFP casting apparatus of the present invention comprises:
The hole is matched to the opening of the crucible whose outer periphery is surrounded by the refractory and has an opening at the lower end, the adapter is fitted to the refractory, and the opening of the adapter and the opening formed at the lower end of the crucible are formed. An insert having a flange portion is fitted to one end of the soft copper washer fitted to the outside, a ring-shaped insert contact jig is brought into contact with the insert flange portion, and a cylindrical body is interposed between the insert contact jig. Then, a cylindrical pressing jig having a screw portion on the outer periphery and having a regular hexagonal convex portion at the lower end is pressed, and the screw portion of the cylindrical pressing jig is provided on the upper inner wall surface of the adapter. The adapter is screwed into the female screw, the cylinder is pushed in, the insert abutment jig presses the insert flange to crush and seal the soft copper washer, and the adapter flange has a hole that penetrates the cylinder. Seed In an insert fixing jig of a DFP casting apparatus, which is provided with a joint tool provided with a cylindrical part for fitting a guide hose and a fixing part whose outer peripheral part is formed thick, a pipe is provided in a central recess of the joint part. Form a regular hexagonal concave part that matches the regular hexagonal convex part of the body holding jig, and form a regular hexagonal engaging part around the cylindrical part at the base of the cylindrical part at the center of the lower surface of the fixed part of the joint tool. While forming
A long hole is formed in the fixing part of the joint tool for bolting to the flange part of the adapter, and when the pressing by the insert contact jig for holding the insert is loosened, the joint tool is turned to fix the cylindrical body holding jig. To complete the seal between the insert and the adapter.

[0014]

With the soft copper washer interposed in the insert, the insert is inserted into the opening formed at the lower end of the crucible. Thereafter, the insert abutment jig is brought into contact with the insert flange, the cylinder abutment jig is pressed through the cylinder against the insert abutment jig, and the screw part of the cylinder abutment jig is screwed into the adapter. It is screwed into a female screw provided on the upper part of the inner wall surface. Then, the regular hexagonal concave portion formed in the central concave portion of the joint tool is fitted to the regular hexagonal convex portion at the lower end of the cylindrical pressing jig, and the engaging portion of the joint component is turned with a spanner or the like. The jig is turned to push the cylinder in, and the insert abutting jig presses the flange portion of the insert, which crushes the soft copper washer and seals the gap between the flange portion of the insert and the adapter.

Thereafter, the temperature is set to 1120 ° C.-116 in a crucible.
When the molten copper at 0 ° C. is charged, the heat of the molten copper causes the insert and the insert fixing jig to reach a high temperature and expand. This expansion is absorbed by the reduced crushing of the soft copper washer for sealing, and the seal between the crucible opening and the insert is complete.

When a line trouble or the like occurs, all of the molten copper filled in the crucible is once removed. At this time, the temperature of the entire crucible gradually decreases, the temperature of the insert and the insert fixing jig becomes low, and the insert, the insert contact jig, the cylinder, and the cylinder holding jig contract. The shrinkage of the insert and the insert fixing jig causes looseness between the opening of the crucible and the insert, and this looseness creates a gap between the insert and the opening of the crucible.

Therefore, once the molten copper filled in the crucible is completely removed, the temperature of the entire crucible gradually decreases, and the insert, the insert contacting jig, the cylinder, and the cylinder pressing jig shrink. First, before loosening between the crucible opening and the insert, loosen the bolt attaching the joint to the adapter, turn the joint, tighten the cylinder, and push it in. To prevent a gap from being formed between the flange portion of the insert and the adapter, and re-sealing between the flange portion of the insert and the adapter.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an insert fixing jig of a DFP casting apparatus according to the present invention will be described below. 1 to 7 show an embodiment of an insert fixing jig of a DFP casting apparatus according to the present invention. FIG. 1 shows a DFP according to the present invention.
FIG. 2 is a partial cross-sectional view of the joint shown in FIG. 1, FIG. 3 is a plan view of the joint shown in FIG. 1, and FIG. 4 is FIG. FIG. 5 is a DF according to the present invention.
FIG. 6 is an overall perspective view of a cylindrical pressing jig of an insert fixing jig of a P casting apparatus, FIG. 6 is a partial cross-sectional view of the cylindrical pressing jig shown in FIG. 5, and FIG. 7 is an insert of a DFP casting apparatus according to the present invention. It is a figure showing the state where the fixing jig was inserted.

In FIG. 1, reference numeral 1 denotes a joint, which comprises a fixed portion 2 and a cylindrical portion 3 whose outer peripheral portions are made thick. The fixing part 2 is formed in a disk shape, and has a circular step part 4 formed in the center. A substantially hexagonal concave portion 5 is formed substantially at the center of the step portion 4. The regular hexagonal concave portion 5 has a size such that the regular hexagonal convex portion 372 formed on the lower surface of the cylindrical pressing jig 370 can be closely fitted as shown in FIGS. ing.
Reference numeral 374 denotes a thread portion formed on the outer peripheral surface of the cylindrical pressing jig 370. This screw part 374 is the adapter 300
Is screwed into a female screw provided on the upper part of the inner wall surface.

Reference numeral 6 denotes a hole formed substantially at the center of the recess 5. Reference numeral 7 denotes an engaging portion which is formed in a regular hexagonal step and formed at the center of the lower surface of the fixing portion 2 of the joint 1. The engaging portion 7 is used to bite a wrench or the like when turning the joint 1 strongly. The cylindrical part 3
It is formed in a tubular shape, and is provided on the lower surface of the fixed part 2. The cylindrical portion 3 has a communication hole 8 at the center. This communication hole 8 communicates with the hole 6 of the fixed part 2. This cylindrical part 3
Is configured such that a hose 400 for guiding the core rod wire 160 as a seed wire can be connected. 9, 10,
Reference numeral 11 denotes a long hole, which is formed in a thick portion of the fixed portion 3 along an arc of the fixed portion 3 having a predetermined length. These slots 9, 10, 11
7 is a hole for fitting the bolt 390 as shown in FIG. 7 for tightly fixing the joint 1 to the flange 320 of the adapter 300 by the bolt 390.

Next, the operation of this embodiment will be described.

First, the insert 330 is inserted into the opening 155 formed at the lower end of the crucible 150 with the soft copper washer 340 interposed between the insert 330. Thereafter, the insert contacting jig 350 is brought into contact with the flange portion 335 of the insert 330, and the cylindrical pressing jig 370 is pressed against the insert contacting jig 350 via the cylindrical body 360. 370 screw part 374
Is screwed into a female screw provided on the upper part of the inner wall surface of the adapter 300, and the cylindrical pressing jig 370 is turned to push the cylindrical body 360, so that the insert abutting jig 350 connects the flange portion 335 of the insert 330. When pressed, the soft copper washer 340 is crushed and sealed by the flange portion 335. Further, the regular hexagonal concave portion 5 formed at the center of the upper surface of the fixing portion 2 of the joint 1 is fitted to the regular hexagonal convex portion 372 formed on the lower surface of the cylindrical holding jig 370. Then, bolts 3 are inserted into the elongated holes 9, 10 and 11.
The joint tool 1 is fixed to the flange 320 of the adapter 300 as shown in FIG. Thereafter, the molten copper 250 at 1120 ° C. to 1160 ° C.
Is inserted, the heat of the molten copper 250 causes the insert 3
30 and the insert fixture become hot and expand. This expansion is absorbed by the collapse of the soft copper washer 340 for sealing and the opening 155 of the crucible 150.
The seal between the and the insert 330 is complete.

When a line trouble or the like occurs, the molten copper 250 filled in the crucible 150 is once removed. At this time, the temperature of the entire crucible 150 gradually decreases, and the temperature of the insert 330 and the insert fixing jig becomes low.
0, the cylinder 360, and the cylinder pressing jig 370 contract.
The shrinkage of the insert 330 and the insert fixing jig causes looseness between the opening 155 of the crucible 150 and the insert 330, and this looseness generates a gap between the insert 330 and the opening 155 of the crucible 150. . Therefore, the molten copper 2 filled in the crucible 150
The entire temperature of the crucible 150 is gradually decreased, and the insert 330, the insert contact jig 350, the cylindrical body 360, and the cylindrical pressing jig 370 begin to contract, and the opening 155 of the crucible 150 is removed. And insert 330
The three bolts 390 attaching the joint 1 to the adapter 320 are loosened before loosening occurs between the two. Then, by turning the joint 1, the cylindrical pressing jig 37 fitted in the regular hexagonal concave portion 5 formed in the center of the upper surface of the fixing portion 2 of the joint 1.
0, the cylindrical pressing jig 370 is rotated and tightened by the regular hexagonal convex portion 372 formed on the lower surface of the cylindrical body 3.
Press 60 in. When the cylinder 360 is pushed in, the insert contact jig 350 presses the flange portion 335 of the insert 330 and the flange portion 33 of the insert 330.
A gap is prevented from being formed between the adapter 5 and the adapter 5. By turning the joint 1, the gap between the flange portion 335 of the insert 330 and the adapter 320 is sealed again.

Therefore, according to this embodiment, when the molten copper 250 is removed from the crucible 150 due to a line trouble or the like,
Even if the temperature of the entire crucible 150 drops, the soft copper washer 3
40 can be completely sealed and insert 330
No air can pass through this part, so insert 33
0 can be prevented from being oxidized and dissolved.

[0025]

According to the present invention, as described above, a regular hexagonal concave portion is formed in the central concave portion of the joint fixture so as to match the regular hexagonal convex portion of the cylindrical holding jig, and the lower surface of the fixing part of the joint fixture is formed. A regular hexagonal engaging portion is formed around the cylindrical portion at the center of the cylindrical portion at the center, and an elongated hole is formed in the fixing portion of the joint tool for bolting to the flange portion of the adapter. When the molten copper is removed from the crucible due to troubles, etc., even if the temperature of the entire crucible drops, the soft copper washer can be completely sealed, and the insert prevents oxidative damage without allowing air to enter the insert be able to.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a joint tool showing one embodiment of an insert fixing jig of a DFP casting apparatus according to the present invention.

FIG. 2 is a partial cross-sectional view of the joint tool shown in FIG.

FIG. 3 is a plan view of the joint tool shown in FIG.

FIG. 4 is a sectional front view of the joint tool shown in FIG. 3;

FIG. 5 is an overall perspective view of a cylindrical pressing jig of the insert fixing jig of the DFP casting apparatus according to the present invention.

FIG. 6 is a partial cross-sectional view of the cylinder pressing jig shown in FIG. 5;

FIG. 7 is a view showing a state in which an insert fixing jig of the DFP casting apparatus according to the present invention is inserted.

FIG. 8 is a schematic configuration diagram of a DFP casting device.

FIG. 9 is a partial cross-sectional overall configuration diagram showing a holding furnace of a conventional DFP casting apparatus.

10 is a view showing a state where a conventional insert fixing jig is inserted into the crucible of the DFP casting apparatus shown in FIG.

FIG. 11 is a bottom view of a joint tool of the conventional insert fixing jig shown in FIG.

FIG. 12 is a plan view of the cylinder pressing jig shown in FIG. 11;

[Explanation of symbols]

1 …………………………………………………
… Joint tool 2 ……………………………………………………
… Fixing part 3 ……………………………………………
… Cylinder part 4 ………………………………………………………
… Stepped part 5 ………………………………………………
… Recess 7 ………………………………………………………
… Engaging part 9, 10, 11 …………………………………
… Elongated hole 100 ………………………………………………
… DFP casting equipment 150 …………………………………………………
… Crucible 155 ………………………………………………
… Opening 160 ………………………………………………
… Core rod wire 300 ……………………………………………………
… Adapter 330 …………………………………………………
… Insert 335 …………………………………………………
… Flange part 340 ……………………………………………
… Annealed copper washer 360 ……………………………………………
… Cylinder 370 ……………………………………………
… Cylinder holding jig 390 ……………………………………………
…bolt

Claims (1)

(57) [Claims] 1. A crucible having an outer periphery surrounded by a refractory and having an opening at a lower end, wherein a hole is aligned with an opening of the crucible, an adapter is fitted to the refractory, and formed at the hole of the adapter and a lower end of the crucible. An insert provided with a flange at one end where a metal washer is fitted to the outside of the opening is fitted, and a ring-shaped insert contact jig is brought into contact with the flange of the insert, and the insert contact is fixed. A cylindrical holding jig having a screw portion on the outer periphery and a regular hexagonal convex portion at the lower end is pressed with a cylindrical body interposed therebetween, and the screw portion of the cylindrical holding jig is attached to the inner wall surface of the adapter. It is screwed into a female screw provided at the upper part, the cylindrical body is pushed in, the flange portion of the insert is pressed by the insert contact jig, the metallic washer is crushed and sealed, and the cylindrical portion is fitted to the flange portion of the adapter. Penetrate the body In an insert fixing jig of a DFP casting apparatus, which is provided with a joint having a cylindrical portion having a hole through which a hose for guiding a seed line is fitted and a fixing portion having an outer peripheral portion formed to be thick, A polygonal concave portion is formed in the central concave portion of the joint tool so as to match the regular hexagonal convex portion of the cylindrical pressing jig. Along with forming an engaging portion having a shape, an elongated hole is formed in a fixing portion of the joint tool so as to be bolted to a flange portion of the adapter,
When the pressing by the insert abutting jig for holding the insert is loosened, the joint is turned to push the cylindrical holding jig to complete the seal between the insert and the adapter. DFP
Insert fixing jig for casting equipment.