JP2007284785A - Apparatus for threading metal foil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for threading a metal foil by which the metal foil can be threaded smoothly with a simple apparatus configuration. <P>SOLUTION: A threading bar 22 is composed of a plurality of pipes or bars mutually connectable with both end parts thereof and a threading tool 23 for holding up the threading bar 22 to the higher position than the upper end level of a supporting roll 21 in a furnace, is disposed at near the upstream side of the supporting roll 21. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a threading device for metal foil in a horizontal continuous annealing furnace for metal foil.

  In the horizontal continuous annealing furnace for metal foil, when the furnace is started up or when the metal foil is ruptured, new threading for passing the metal foil through the furnace is required. At this time, if the heater power in the furnace is turned off, the furnace temperature is lowered, the atmosphere gas in the furnace is replaced with air, the metal foil is passed through the furnace, and then returned to an operable state, 3-4 Since it takes a long time, threading while holding the atmospheric gas without turning off the power of the heater is desired.

  Normally, threading into a steel strip furnace in a horizontal continuous processing furnace such as a continuous annealing furnace for steel strips, continuous hot dipping plating equipment, etc. is carried by a hearth roll which is a means for transporting the steel strip. Generally, a steel strip is connected to the rear end. When the hearth rolls are provided at a pitch of about 3 m, the length of the threading bar is about 10 m when the three bars are arranged so as not to fall between the hearth rolls. Therefore, the conventional steel strip threading technology using a threading bar requires a large threading space before and after the furnace. Further, since the threading bar is a heavy object having a length of 10 m, it cannot be manually inserted into the furnace, and a dedicated machine is required.

  On the other hand, in a horizontal continuous annealing furnace for metal foil, a metal foil having a thickness of 500 μm or less and a width of 600 mm or less is usually passed. The metal foil is supported and conveyed by a support roll provided in the furnace with a gap of 2 to 5 m. If the threading bar used for threading a conventional steel strip is used for threading in a horizontal continuous annealing furnace for metal foil, not only does the threading work become large, but the threading bar, which is a heavy object, causes the threading on the surface of the support roll. The problem of sticking occurs.

  On the other hand, Patent Document 1 discloses a threading technique using a plurality of pipes or rods that can be connected to each other at both ends of the threading bar. In this technique, a plurality of pipes or rods are sequentially connected on the entrance side of the furnace and repeated until they come out on the exit side of the furnace. And the connection of a pipe or a rod is sequentially released on the furnace exit side. This technique requires less threading space on the entrance and exit sides of the furnace.

  However, in the technique of Patent Document 1, traveling means (wheels) are provided in a plurality of pipes or rods constituting the threading bar, and a dedicated passage for threading bar traveling is provided in the furnace wall, which increases the equipment cost. . In addition, if the threading bar is allowed to pass along the passage plate path in the furnace without providing the threading bar traveling passage, the threading bar consisting of a pipe or a bar will bend downward in the middle of the threading bar, Threading prevents threading.

  On the other hand, Patent Document 2 discloses a threading technique that does not use a threading bar. In this technique, an outer tube provided with a notch continuous from both ends of the furnace wall to the furnace wall is attached to the furnace wall with the notch facing the inside of the furnace, and the outer tube is continuous to both ends inside the outer tube. A steel strip traction wire that fits in an inner tube with a notch so that it can rotate from the inlet to the outlet of the furnace and can move into the inner tube through the notches of the inner and outer tubes. A rope is inserted and this wire rope is pulled with a winch to thread.

However, in the technique of Patent Document 2, in order to prevent deformation of the outer tube and the inner tube provided for threading, it is necessary to send air into the inner tube by a blower, and this air cools the inside of the furnace. , Thermal efficiency deteriorates. In addition, the mechanism for rotating the inner tube within the outer tube is likely to cause a rotation failure due to catching in the middle, and lacks stability in the long term.
JP-A 63-219531 Japanese Utility Model Laid-Open No. 2-110662

  The present invention eliminates that problem from the standpoint that it is effective to use a threading bar formed by connecting a plurality of pipes or rods, as disclosed in Patent Document 1, for simple threading of metal foil. An object of the present invention is to provide a threading device for metal foil that can smoothly thread with a simple device configuration.

  In order to solve the above problems, a threading device for a metal foil according to the present invention is a threading device for a metal foil that allows the metal foil to pass through a horizontal continuous annealing furnace for metal foil. It has a threading bar that passes through the furnace of the continuous annealing furnace, and the threading bar is composed of a plurality of pipes or bars that can be connected to each other at both ends thereof, and further upstream of the support roll in the horizontal continuous annealing furnace for metal foil. The threading jig is provided near the side and includes a threading jig for lifting the threading bar to a position higher than the upper end level of the support roll.

  In the present invention, the threading jig may have a rotating shaft provided in the furnace width direction of the horizontal continuous annealing furnace for metal foil, and an eccentric portion connected eccentrically to the rotating shaft. The eccentric part can raise and lower the threading bar as the shaft rotates.

  Further, the threading jig is a chain or wire made of a heat-resistant material provided in the width direction of the horizontal continuous annealing furnace for metal foil, the threading bar is raised by increasing the tension of the chain or wire, and the chain or wire The chain or the wire can be withdrawn from the sheet passing path of the metal foil. Thus, when a chain or a wire is used as the threading jig, the chain or the wire can be disposed through the pipe made of a heat-resistant material in the furnace. Furthermore, the chain or the wire can be fed into the furnace from one end in the furnace width direction and can be drawn out from the other end.

  In the present invention, since the threading bar is composed of a plurality of pipes or rods that can be connected to each other at both ends thereof, the threading space before and after the furnace can be reduced.

  Further, since the threading bar is supported and transported by utilizing a support roll for supporting and transporting the metal foil, it is not necessary to provide a dedicated passage for threading bar travel, and the equipment cost can be reduced.

  In addition, a threading jig that raises the threading bar to a position higher than the upper end level of the support roll is provided near the upstream side of the support roll in the furnace. This eliminates the need for threading.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows an example of a horizontal continuous bright annealing facility for metal foil to which the threading device for metal foil according to the present invention is applied. The horizontal continuous bright annealing equipment for metal foil includes a payoff reel 1, a welder 2, a cleaning device 3, an incoming looper 6, an incoming bridle 7, a bright annealing furnace 10, and an outgoing side in order from the line entrance side. A bridle 17, an exit side looper 18, and a tension reel 19 are provided. The cleaning device 3 includes an electrolytic degreasing tank 4 and an alkali scrubber 5. The bright annealing furnace 10 includes an inlet side sealing device 9, a heating zone 11, a cooling zone 12 composed of a slow cooling zone 13 and a quenching zone 14, and an outlet side sealing device 15. In the case of metal foil, even if the line is stopped by the welder 2 or the like, the weight that is damaged is small, so that the looper may not be provided.

  In the bright annealing furnace 10, the metal foil 32 is annealed in an atmospheric gas 27 such as nitrogen or hydrogen. As shown in FIG. 2, the cross section is provided with an electric heater 28 for heating inside the iron skin 30, the inner surface thereof is covered with a muffle 31 of a heat resistant material such as SUS310, and the remaining space of the electric heater 28 is The heat insulating ceramic fiber 29 and the like are filled. The furnace temperature exceeds 1000 ° C.

  A support roll 21 is provided in the bright annealing furnace 10 with a gap of 2 to 5 m, and the support roll 21 supports and conveys a metal foil 32 having a thickness of 500 μm or less and a width of 600 mm or less. .

  The metal foil 32 is paid out from the payoff reel 1 and guided into the bright annealing furnace 10 through an intermediate facility such as a looper. When the furnace is started up or when the metal foil is broken, new threading for passing the metal foil 32 through the furnace is required. Conventionally, in the threading operation of the metal foil 32, first, the electric heater 28 is turned off, the furnace temperature is lowered, the atmosphere gas 27 in the furnace is replaced with air, and the metal foil 32 is passed through the furnace, and then again. It took 3-4 days to thread because it was back in operation. On the other hand, in the threading device for metal foil according to the present invention, as will be described later, a threading bar composed of a plurality of pipes or rods that can be connected to each other at both ends thereof, and the upper end level of the support roll. By providing a threading jig that lifts to a higher position, threading can be performed smoothly with a simple apparatus configuration without lowering the furnace temperature.

  Below, the threading apparatus of the metal foil which concerns on this invention, and the threading operation | work of the metal foil by it are demonstrated.

  First, a threading bar 22 as shown in FIG. 3 is prepared in the entrance threading space 8 of the bright annealing furnace 10. The threading bar 22 is configured by connecting a plurality of pipes or rods 22a that can be connected to each other at both ends thereof. In the example, a Ti pipe having a length of 4 to 5 m and a diameter of about 10 mm was used. Then, as shown in FIG. 3, the end portions are threaded so that they can be connected to each other, and the connecting jig 33 sequentially connects them.

  Ti pipes 22 a having a diameter of about 10 mm are sequentially connected and inserted into the bright annealing furnace 10. A Ti pipe having a diameter of about 10 mm is lightweight and easy to handle, but when it is 4 to 5 m away from the hand, it is greatly bent as shown in FIG. Therefore, in the present invention, the threading pipe 22 is deposited on the support roll 21 after the tip of the threading bar 22 passes through the support roll 21. That is, as shown in FIG. 4A, the threading bar 22 is temporarily stopped at a position near the upstream side of the support roll 21, and the threading bar 22 is supported by the threading jig 23 as shown in FIG. Lift up to a position higher than the top edge level. Then, the threading bar 22 is threaded to a position where the tip of the threading bar 22 passes the support roll 21, and then the threading jig 23 is lowered to deposit the threading bar 22 on the support roll 21.

  Then, the pipes or rods 22a are sequentially connected and threaded until the tip of the threading bar 22 comes out to the exit side of the bright annealing furnace 10. At this time, each time the threading bar 22 reaches the position near the upstream side of the support roll 21, (1) the threading bar 22 is lifted by the threading jig 23, and (2) the threading bar 22 is moved until it passes the support roll 21. Threading and (3) depositing the threading bar 22 to the support roll 21 are repeated. When the threading bar 22 comes out to the exit side of the bright annealing furnace 10, the metal foil 32 is connected to the rear end of the threading bar 22, and threading of the metal foil 32 is started. In the exit side threading space 16 of the bright annealing furnace 10, the pipes or rods 22a sequentially connected on the entrance side are sequentially removed, and the threading bar 22 is disassembled.

  FIG. 5 shows the configuration of the threading jig 23 used in the example. 5A is a view corresponding to the AA section of FIG. 4A, and FIG. 5B is a view corresponding to the BB section of FIG. 4B.

  A threading jig 23 shown in FIG. 5 has a rotating shaft 23a provided through the furnace wall in the furnace width direction of the bright annealing furnace 10, and an eccentric portion 23b eccentrically connected to the rotating shaft 23a. The eccentric part 23 b is configured to raise and lower the threading bar 22 as the rotary shaft 24 rotates. That is, when the threading jig 23 passes the metal foil 32, as shown in FIG. 5A, the eccentric portion 23b is retracted from the passing path of the metal foil 32 at the lower end. There is no contact. During threading, when the threading bar 22 comes to a position near the upstream side of the support roll 21 as shown in FIG. 4A, the rotating shaft 23a is rotated, and as shown in FIG. Then lift the threading bar 22. After that, when the tip of the threading bar 22 has advanced to a position where it passes through the support roll 21, the eccentric portion 23 b is lowered by rotating the rotating shaft 23 a again, and the threading bar 22 is deposited on the support roll 21. Needless to say, a seal 24 is provided at the bearing portion of the rotary shaft 23a to prevent leakage of atmospheric gas.

  By using such a threading jig 23, collision between the threading bar 22 and the support roll 21 can be avoided during threading, and contact with the metal foil 32 can be avoided when the metal foil 32 is passed. .

  FIG. 6 shows another example of the threading jig. The threading jig 25 shown in FIG. 6 is made of a chain or wire made of a heat-resistant material such as nichrome or W provided in the furnace width direction of the bright annealing furnace 10, and one end of the chain or wire is fixed to the furnace wall. By increasing the tension of the winding chain or the wire with the winch 26, the threading pipe 22 is lifted to a position higher than the upper end level of the support roll 21, as shown in FIG. On the other hand, when passing the metal foil 32, the chain or wire tension is weakened by loosening the winch 26, and the chain or wire is lowered to a position where it does not contact the metal foil 32 by its own weight, as shown in FIG. The metal foil 32 is retracted from the plate passing path. Needless to say, a seal 24 is provided at the lead-out portion of the chain or wire outside the furnace to prevent leakage of atmospheric gas. Also with this threading jig 25, the same effect as the above threading jig 23 can be obtained.

  FIG. 7 shows another example of the threading jig. The threading jig 25 shown in FIG. 7 is made of a chain or wire made of a heat-resistant material provided in the furnace width direction of the bright annealing furnace 10 as in the example of FIG. 6, and in the example of FIG. 7, the chain or wire is a bright annealing furnace. 10 penetrates through a pipe 34 made of a heat-resistant material such as SiC or stainless steel. For example, when the bright annealing furnace 10 has a furnace width of 700 mm, a pipe 34 having a length of 680 mm is used, and a gap with the furnace wall is opened by 10 mm on each side, and is arranged at approximately the center of the furnace width. The diameter of the pipe 34 can be about 10 mm when the diameter of the chain or the wire is 2 mm, for example.

  In the example of FIG. 7, as in the example of FIG. 6, one end of the chain or wire is fixed to the furnace wall, and the other end is wound up by the winch 26 to increase the tension of the chain or wire. As shown in b), the threading pipe 22 is lifted to a position higher than the upper end level of the support roll 21. On the other hand, when passing the metal foil 32, the chain or wire tension is weakened by loosening the winch 26, and the chain or wire is lowered to a position where it does not come into contact with the metal foil 32 by its own weight, as shown in FIG. The metal foil 32 is retracted from the plate passing path.

  In the example of FIG. 7, the chain or wire penetrates through the pipe 34 made of a heat-resistant material in the bright annealing furnace 10, so that even if the chain or wire is thin, sufficient wear resistance can be obtained. Strength can be secured. Moreover, the pipe 34 plays the role of a weight when the metal foil 32 is passed, and the chain or the wire can be stably lowered to the hearth by its own weight.

  FIG. 8 shows another example of a threading jig. 6 and 7, one end of the chain or wire, which is the threading jig 25, is fixed to the furnace wall. However, in the example of FIG. 8, the chain or wire is fed into the furnace from one end and the other end is exposed to the outside of the furnace. I am going to pay out. Specifically, the chain or wire is paid out from the winch 26 on one end side in the furnace width direction and fed into the furnace from one end in the furnace width direction, and the other end side of the chain or wire is moved by the winch 26 on the other end side in the furnace width direction. It is wound up and fed out of the furnace from the other end in the furnace width direction.

  By making the chain or wire retractable in this way, a new chain or wire can be supplied when the chain or wire in the furnace is damaged. It can be avoided.

An example of the horizontal continuous bright annealing equipment for metal foil which applies the threading apparatus of the metal foil which concerns on this invention is shown. The cross-sectional example of a bright annealing furnace is shown. The structural example of a threading bar is shown. The operation of the threading jig is shown. The structural example of a threading jig is shown. The other structural example of a threading jig is shown. The other structural example of a threading jig is shown. The other structural example of a threading jig is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pay-off reel 2 Welder 3 Cleaning apparatus 4 Electrolytic degreasing tank 5 Alkaline scrubber 6 Incoming looper 7 Incoming bridle 8 Incoming threading space 9 Incoming sealing apparatus 10 Bright annealing furnace 11 Heating zone 12 Cooling zone 13 Gradual cooling zone 14 Rapid cooling zone DESCRIPTION OF SYMBOLS 15 Outgoing side sealing apparatus 16 Outgoing side threading space 17 Outgoing side bridle 18 Outgoing side looper 19 Tension reel 21 Support roll 22 Threading bar 22a Pipe or rod 23 Threading jig 23a Rotating shaft 23b Eccentric part 24 Seal 25 Threading jig 26 Winch 27 Atmospheric gas 28 Electric heater 29 Ceramic fiber 30 Iron skin 31 Muffle 32 Metal foil 33 Connecting jig 34 Pipe

Claims (5)

A metal foil threading device for passing metal foil through a horizontal continuous annealing furnace for metal foil,
With a threading bar that connects the metal foil and passes through the inside of the horizontal continuous annealing furnace for metal foil,
The threading bar is composed of a plurality of pipes or bars that can be connected to each other at both ends thereof.
Furthermore, the metal foil threading apparatus provided with the threading jig | tool which is arrange | positioned in the upstream vicinity of the support roll in the horizontal continuous annealing furnace for metal foils, and raises a threading bar to a position higher than the upper end level of a support roll.   A threading jig has a rotating shaft provided in the furnace width direction of the horizontal continuous annealing furnace for metal foil, and an eccentric portion connected eccentrically to the rotating shaft, and the eccentric portion is rotated with the rotation of the rotating shaft. The threading device for metal foil according to claim 1, wherein the threading bar is moved up and down.   The threading jig is composed of a chain or a wire made of a heat-resistant material provided in the width direction of the horizontal continuous furnace for metal foil, and the threading bar is raised by increasing the tension of the chain or the wire. The threading device for metal foil according to claim 1, wherein the chain or the wire is retracted from the sheet-passing path of the metal foil by reducing the tension.   The threading device for metal foil according to claim 3, wherein the chain or the wire passes through a pipe made of a heat-resistant material in the furnace.   The threading device for metal foil according to claim 3 or 4, wherein the chain or the wire can be fed into the furnace from one end in the furnace width direction and can be fed out from the other end.

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