CN100400200C

CN100400200C - Dual roll casting machine and method of operating the casting machine

Info

Publication number: CN100400200C
Application number: CNB2006100956379A
Authority: CN
Inventors: 中山勇; 中山勝巳; 长田史郎
Original assignee: IHI Corp
Current assignee: Nucor Corp
Priority date: 2002-08-12
Filing date: 2003-07-24
Publication date: 2008-07-09
Anticipated expiration: 2023-07-24
Also published as: CN1879989A; CN100478101C; CN1895817A

Abstract

A twin roll casting machine that can reduce an amount of inert gas to be fed for prevention of oxidization. The machine includes a pair of chilled rolls, a pair of pinch rolls, an enclosure enclosing a strip in a range from chilled rolls to pinch rolls, sealing members between peripheral edges of the chilled rolls and the enclosure, sealing members between peripheral edges of the pinch rolls and the enclosure, a level part arranged at the strip feeded from chilled rolls to pinch rolls and a table roll arranded within the enclosure. A third swing wall within the enclosure arranded at top part of the table rolls and adjacent to a side of upstream of the pinch rolls, has a tip end movable toward and away from a surface of the strip, a third sealing roll which is approximately parallel to the tale rolls rotatably supported by the tip end of the third swing wall, sealing members between peripheral edges of the third swing walls and an inner surface of the enclosure, and conduits for supplying inert gas into the enclosure.

Description

Dual roll casting machine and method of operation thereof

The application divides an application, and the application number of its female case is 03801668.0, and the applying date is on July 24th, 2003, and the denomination of invention of female case is dual roll casting machine and method of operation thereof.

Technical field

The present invention relates to dual roll casting machine and method of operation thereof.

Background technology

Fig. 1 is the figure of an example of the dual roll casting machine of the expression prior art of opening the described invention of flat 8-300108 communique based on the spy.

This dual roll casting machine has: a pair of chill roll 1, the a pair of side shield 2 that attaches on this chill roll 1, band 3 that clamping is cast by chill roll 1 and a pair of pinch roll of carrying to the subsequent handling of roll forming etc. 4, have the left and right sides sidewall relative with the plate width direction edge part of band 3, and the encirclement housing 5 that between 4 mobile alignment of band 3 is surrounded from chill roll 1 to pinch roll, the wearing of inside that is arranged on this encirclement housing 5 expected platform 6 and a plurality of bench roller 7, with the seal member 8 that links to each other with the upstream portion of the moving direction of the band 3 that surrounds housing 5 with the mode of the outer peripheral face of each chill roll 1 butt joint, and the seal member 9 to link to each other with the downstream part of the moving direction of the band 3 of encirclement housing 5 with the mode of the outer peripheral face butt joint of each pinch roll 4.

Chill roll 1 level and configuration parallel to each other can be stretched it according to the thickness of slab of the band 3 that will cast and are adjusted the roller gap.

The direction of rotation and the speed of chill roll 1 are set at, make separately outer peripheral face from upside towards the roller gap with constant speed movement.

In addition, chill roll 1 forms within it portion's cooling water that can circulate.

The side shield 2 of one end carries out face with an end face of each chill roll 1 and contacts, and the side shield 2 of the other end carries out face with the other end of each chill roll 1 and contacts, supplying melting metal in the space that side shield 2 and chill roll 1 surround, and this metal forms liquid-bath 10.

If on one side with chill roll 1 heat extraction, form above-mentioned liquid-bath 10 on one side and chill roll 1 is rotated, then metal solidifies on the outer peripheral face of chill roll 1, band 3 sends downwards from the roller gap.

Pinch roll 4 is set to, at the downside of chill roll 1 and near the subsequent handling that band 3 will be transported to.

Wear the state that material platform 6 can be set in the band of sending from chill roll 1 to pinch roll 4 one sides guidings 3, and any position that does not contact the state of band 3.

In addition, bench roller 7 is configured to, from the following side bearing of band 3 through wearing material platform 6 towards the band 3 of pinch roll 4 one sides.

Ash can 11 be arranged on chill roll 1 under the position, be connected the bottom that surrounds housing 5 via seal member 80, the band that shape defect is arranged 3 that produces when making it possible to the casting beginning reclaims to this ash can 11.

And then inert gas (nitrogen) G supplies to the inside that surrounds housing 5 and ash can 11 by pipeline 12, and keeping the inside of encirclement housing 5 is non-oxidizing atmosphere, to prevent the oxidation of high temperature band 3.

In addition, by between the seal member 8 that surrounds between housing 5 and the chill roll 1, and the seal member 9 between encirclement housing 5 and pinch roll 4 suppresses above-mentioned inert gas G and flows out to the outside.

But, in dual roll casting machine shown in Figure 1, be subjected to the influence of the liquid-bath 10 of high temperature, the atmosphere temperature that surrounds housing 5 inside upstream one side near the mobile alignment of band 3 more is high more, and then, because chill roll 1 is positioned at the topmost that surrounds housing 5, thus since stack effect inert gas G from blowing out to the outside that surrounds housing 5 between chill roll 1 and the seal member 8, the ambient atmos suitable with the discharge of inert gas G through between pinch roll 4 and the seal member 9 to surrounding housing 5 inside inflows.

Therefore, if again correspondingly to the internal feed inert gas G that surrounds housing 5, just can not prevent the oxidation of high temperature band 3 according to the discharge of the inert gas G that blows out to the outside.

The present invention develops in view of above-mentioned practical problem, and purpose provides a kind of dual roll casting machine and method of operation thereof that can reduce the quantity delivered of the inert gas that prevents that the band oxidation from using.

Summary of the invention

In an example of dual roll casting machine of the present invention, utilize the swing wall to seal the peripheral edge portion of the 1st and the 2nd swing wall and the space that surrounds between the housing medial surface with seal member, the the 1st and the 2nd swing wall is rotated, so that the 1st and the 2nd sealed roller is positioned on the utmost point near position of band, suppress inert gas from pinch roll one side direction chill roll one side flow.

Under this state, make the moving direction of the corresponding band of the 1st and the 2nd sealed roller and rotate, alleviate the damage that causes when band docks with these sealed rollers.

In addition, by being arranged on the block of the 1st and the 2nd swing on the wall, the gap of the 1st sealed roller and the 2nd sealed roller is remained more than the maximum ga(u)ge of band, to prevent the 1st and the 2nd sealed roller clamping band.

And then, make the 1st and the 2nd actuator action with controlling organization, so that the 1st sealed roller and the 2nd sealed roller that pivot is bearing on the 1st and the 2nd swing wall keep the interval of setting, be certain thereby make the space between each sealed roller and the band.

In other example of dual roll casting machine of the present invention, utilize the swing wall peripheral edge portion of the 3rd swing wall and the space that surrounds between the housing medial surface to be sealed with seal member, the 3rd swing wall is rotated, so that the 3rd sealed roller is positioned on the utmost point near position of band, suppress inert gas from pinch roll one side direction chill roll one side flow.

Under this state, make the moving direction of the corresponding band of the 3rd sealed roller and rotate, caused damage when alleviating band and docking with these sealed rollers.

In addition, by limiting the block that the swing wall rotates, the gap of the 3rd sealed roller and bench roller is remained more than the maximum ga(u)ge of band, to prevent the 3rd sealed roller and bench roller clamping band.

In another other the example of dual roll casting machine of the present invention, with chill roll with seal member respectively near each chill roll, seal member is reduced into the Min. that does not hinder the chill roll rotation with respect to the interval of chill roll outer peripheral face, suppresses inert gas and outwards blow out from surrounding enclosure interior.

In addition, refrigerant in using seal member, chill roll is supplied with continuously, to prevent of the thermal deformation of this chill roll with seal member from the refrigerant feed mechanism.

In the method for operation of dual roll casting machine of the present invention, make the peripheral speed rotation of sealed roller to equate with the translational speed of band, make when band docks with each sealed roller, on band, do not form tangible scratch.

Description of drawings

Fig. 1 is the concept map of an example of the dual roll casting machine of expression prior art;

Fig. 2 is the concept map of the 1st example of the embodiment of expression dual roll casting machine of the present invention;

Fig. 3 is the swing wall of upstream one side of the band moving direction that is associated with Fig. 2 and the drawing in side sectional elevation of sealed roller;

Fig. 4 is that the IV-IV of Fig. 3 is to view;

Fig. 5 is the swing wall of downstream one side of the band moving direction that is associated with Fig. 2 and the drawing in side sectional elevation of sealed roller;

Fig. 6 is that the VI-VI of Fig. 5 is to view;

Fig. 7 is that the VII-VII of Fig. 5 is to view;

Fig. 8 is the swing mechanism that is associated with Fig. 2 and the concept map of controlling organization thereof;

Fig. 9 is the concept map of the 2nd example of the embodiment of expression dual roll casting machine of the present invention;

Figure 10 is the encirclement housing that is associated with Fig. 9 and the partial longitudinal section of seal member;

Figure 11 is the drawing in side sectional elevation of the seal member that is associated with Fig. 9.

The specific embodiment

In order to illustrate in greater detail the present invention, illustrate according to accompanying drawing.

Fig. 2 to Fig. 8 is the figure of the 1st example of the embodiment of expression dual roll casting machine of the present invention, and among the figure, the part that marks the mark identical with Fig. 1 is represented same section.

This dual roll casting machine has: being configured in encirclement housing 5 inside and leading section can be near the swing wall 13 that leave a face (face that the pinch roll 4 of upside is docked) of band 3, with chill roll 1 abreast pivot be bearing in sealed roller 14 on the front end of this swing wall 13, being configured in encirclement housing 5 inside and leading section can be near the swing wall 15 that leave another face (face that the pinch roll 4 of downside is controlled) of band 3, with chill roll 1 abreast pivot be bearing in sealed roller 16 on the front end of this swing wall 15, be configured in and surround housing 5 inside to allow to from these sealed rollers 14,16 a plurality of bench rollers 17 to pinch roll 4 approximate horizontal ground conveying band 3, be positioned at bench roller 17 the top be configured in and surround housing 5 inside and leading section can be near the swing wall 18 that leave a face of band 3, with chill roll 1 abreast pivot be bearing in sealed roller 19 on the front end of this swing wall 18, and from the gas chamber 20 of the bench roller 17 ejection inert gas G that side direction sealing roller 19 will be approaching down.

Swing wall

13,15,18 by constituting with the lower part: the arm 21 that the sidewall along about encirclement housing 5 disposes, 22, between two arms 21, between 22 and from these

arms

21,22 base end part near the front end partial fixing about the dividing plate 23 of edge part, be connected on the base end part of an arm 21 and connect the bolster 24 of the sidewall that surrounds housing 5 rotationally, be attached on the rearward end of another arm 22 and connect the bolster 25 of the hollow structure of the sidewall that surrounds housing 5 rotationally, and be arranged on and surround housing 5 outsides and

pivot supporting bolster

24,25 bearing 26,27.

Between bearing 26,27 and encirclement housing 5, to dispose

undulatory seal member

28,29 round the mode of

bolster

24,25 at circumferencial direction.

One end of

seal member

28,29 is installed on the end face of

bearing

26,27, and the other end is installed on the sidewall outer surface that surrounds housing 5.

Sealed

roller

14,16,19 is made of cylindrical portion cylindraceous 30 and the

wheel hub

31,32 that is embedded on each end of this cylindrical portion 30.

Wheel hub 31 on the position of the close front end of arm 21, another wheel hub 32 on the position of the close front end of arm 22 respectively by bearing 33,34 carry out the pivot supporting, so that the outer peripheral face of sealed

roller

14,16,19 reduces with respect to the interval of the edge part of dividing plate 23 as far as possible.

Above-mentioned

swing wall

13,15,18 is by

swing mechanism

35,36,37 and rotate, sealed

roller

14,16, and 19 rotate by driving mechanism 38,39,40.

Swing mechanism

35,36,37 by be configured in surround the outside of housing 5 and can to the pressure cylinder 41 of the flexible gudgeon shape of the moving direction of band 3 and interlocking on the end of bolster 24 and the control lever 43 that is linking the piston rod 42 of pressure cylinder 41 constitute.

The expanding-contracting action of pressure cylinder 41 is delivered to from control lever 43 on the bolster 24 of

swing wall

13,15,18, thus, sealed

roller

14,16,19 with respect to band near leaving.

Driving mechanism 38,39,40 by constituting with the lower part: with driving shaft 44 and bolster 25 over against mode be configured in the motor 45 of the outside that surrounds housing 5, insert the inside and the jackshaft 46 of end interlocking on driving shaft 44 that lead to bolster 25, by bearing 47,48 pivots are bearing in the base end part inboard of arm 22 and are rabbeting the sprocket wheel 49 of the other end of jackshaft 46, be configured in the inboard and interlocking of the leading section of arm 22 at sealed

roller

14,16, sprocket wheel 50 on the wheel hub 32 of the other end of 19, and around the chain 51 that hangs over the ring-type on this

sprocket wheel

49,50.

The rotation of the driving shaft 44 of motor 45 passes to wheel hub 32 through jackshaft 46, sprocket wheel 49, chain 51, sprocket wheel 50, thus, and sealed

roller

14,16,19 rotations.

Thus, if, make each sealed

roller

14,16 with corresponding to from the peripheral speed of chill roll 1 to the speed of pinch roll 4

conveying bands

3,19 rotations, then band 3 vibrates on its thickness of slab direction, even band 3 and sealed

roller

14,16,19 outer peripheral face butt joint can not form tangible scratch yet on band 3.

On the

arm

21,22 of

swing wall

13,15,18, the

seal member

52,53 that extends to the total length of fore-end near the part of its cardinal extremity is installed, and this member can be slided on the sidewall that surrounds housing 5.

On the extremely near position of the base end part of the

swing wall

13,15,18 of the medial surface that surrounds housing 5, the seal member 54 to horizontal extension is installed, and this member can be slided on the upper rim of the base end part of

arm

21,22 and dividing plate 23.

These

seal members

52,53,54 form by having hear resistance and material that can strain.

That is to say that the space between the medial surface of

swing wall

13,15,18 and encirclement housing 5 is sealed by above-mentioned

seal member

52,53,54.

On the leading section of

arm

21,22 of swing wall 13, be provided with block 55, in addition, be provided with block 56 at the leading section of the

arm

21,22 of swing wall 15, and this block can be docked with above-mentioned block 55.

The shape set of block 55,56 is, during butt joint, the value in the gap of the cylindrical portion 30 of each sealed

roller

14,16 is the maximum thickness of slab that is not less than by the band 3 of chill roll 1 casting mutually for, block 55,56 approaching relatively when the leading section of

swing wall

13,15.

Thus, even block 55,56 docks mutually, two sealed

rollers

14,16 can clamping band 3 yet, but the space that keeps regulation with respect to this band 3.

The medial surface that surrounds housing 5 is provided with block 57, and makes this block relative with the

arm

21,22 of swing wall 18 from downside.

The set positions of block 57 is, when the leading section of swing wall 18 during near bench roller 17, the interval of the cylindrical portion 30 of sealed roller 19 and the bench roller 17 corresponding with it is not less than the maximum thickness of slab by the band 3 of chill roll 1 casting.

Thus, even

arm

21,22 docks with block 57, bench roller 17 and sealed roller 19 can clamping bands 3 yet, but keeping the space with respect to this band 3.

And then on the

swing mechanism

35,36 that

swing wall

13,15 is rotated, attaching has controlling organization 58.

Controlling organization 58 is by constituting with the lower part: the flow channel switching valve 59 that is provided with on each pressure cylinder 41, on being assembled into a pressure cylinder 41 in the swing mechanism 35, install, and send position detector 61 with the corresponding detection signal 60 in the position of piston rod 42, has the operating grip 62 that can tilt by manual operation, and send the set positions device 64 of the command signal corresponding 63 with this angle of inclination, send the open instruction device 66 of command signal 65 by manual operation, and with detection signal 60 and and instruction signal 63, the switching signal 67 of 65 correspondences, 68 controllers of sending to flow channel switching valve 59 69 (with reference to Fig. 8).

The switching signal 67 that flow channel switching valve 59 transmits according to

controller

69,68, be set at following any state, promptly, the state that the bar side liquid chamber of pressure cylinder 41 and a side liquid chamber are disconnected from the outside, the state that is communicated with and a side liquid chamber is communicated with pumping hole T with pumping hole P with the bar side liquid chamber that makes pressure cylinder 41, and the state that makes a side liquid chamber of pressure cylinder 41 be communicated with and bar side liquid chamber is communicated with pumping hole T with pumping hole P.

Controller 69 is based on the command signal 63 that transmits from set positions device 64, switching signal 67 sent to the flow channel switching valve 59 on the pressure cylinder 41 that is connected a swing mechanism 35, and switching signal 68 is sent to flow channel switching valve 59 on the pressure cylinder 41 that is connected another swing mechanism 36 based on the detection signal 60 that sends from position detector 61, make each pressure cylinder 41 action, so that sealed

roller

14,16 when keeping certain interval, and swing wall 15 is being followed swing wall 13 and rotated.

In addition, when receiving, send switching

signals

67,68, make each pressure cylinder 41 action, so that

swing wall

13,15 rotates to the direction that sealed

roller

14,16 is separated from each other to each flow channel switching valve 59 from command signal 65 that open instruction device 66 sends.

Gas chamber 20 is the hollow structure bodies that have the opening that is used to spray inert gas G on top, is arranged on the inner bottom part that surrounds housing 5, so that be positioned at the downside of the bench roller 17 that sealed roller 19 will be approaching.

Inert gas G is sent to the inside of this gas chamber 20 from pipeline 70.

In addition, be used for to than space 72 between space 71,

swing wall

13,15 and the swing wall 18 of

swing wall

13,15 more close chill roll 1 one sides and the pipeline 74 of supplying with inert gas G than the space 73 of swing wall 18 more close pinch roll 4 one sides surrounding to be connected with on the

housing

5,75,76.

The action of the dual roll casting machine shown in the following key diagram 2 to Fig. 8.

Before the casting of beginning band 3, by

pipeline

74,75,76 to the internal feed inert gas G that surrounds housing 5, thereby makes the inside of this encirclement housing 5 become non-oxidizing atmosphere earlier.

And then, by the open instruction device 66 of manual operation, send command signal 65 to controller 69, send switching

signal

67,68 from this controller 69, will be connected swing mechanism 35, flow channel switching valve 59 on each pressure cylinder 41 of 36 is set at this pressure cylinder 41 to making swing wall 13, the state of the direction action that 15 leading section leaves mutually makes sealed

roller

14,16 retreat to the position of the conveying circuit that leaves band 3.

In addition, the pressure cylinder 41 that makes swing mechanism 37 leaves the direction action of bench roller 17 to the leading section of swing wall 18, and the position that makes it to leave to sealed roller 19 landline of band 3 retreats.

In this state, supplying melting metal in the space that surrounds by side shield 2 and chill roll 1 and form liquid-bath 10, make chill roll 1 rotation, from the roller gap with band 3 downwards a side send.

At this moment, by wearing material platform 6 band 3 is guided, sends to subsequent handling to pinch roll 4 from bench roller 17.

In addition, make driving mechanism 38,39,40 motor 45 actions make sealed

roller

14,16, and 19 to rotate with the moving direction and the corresponding peripheral speed of translational speed of band 3.

Then, the operating grip 62 of manual operation set positions 64 is sent command signal 63 to controller 69, so that swing wall 13 rotates near the direction of band 3 to sealed roller 14.

Thus, the flow channel switching valve 59 of slave controller 69 on the pressure 41 that is connected a swing mechanism 35 sent switching signal 67, and based on the detection signal 60 that sends from position detector 61, the flow channel switching valve 59 of slave controller 69 on the pressure cylinder 41 that is connected another swing mechanism 36 sent switching signal 68, make each pressure cylinder 41 action, make sealed

roller

14,16 when keeping certain interval, swing wall 15 is being followed 13 rotations of swing wall, thereby two sealed

rollers

14,16 intervals with respect to band 3 dwindle, and band 3 is roughly certain with being spaced apart of sealed

roller

14,16.

Because these

swing walls

13,15 and surround sealed as mentioned above parts 52 in space between housing 5 medial surfaces, 53,54 sealings are so swung the space 71 that

wall

13,15 separates, 72 become only by each sealed

roller

14,16 and band 3 between the state that is communicated with of little space, 72 outflows to space 71 are suppressed the inert gas G that causes because of the atmosphere temperature difference in

space

71,72 from the space.

In addition, even the block 55 of

arm

21,22,56 butt joints mutually, the interval of sealed

roller

14,16 also can keep the state above the maximum thickness of slab of band 3, so the situation of each sealed

roller

14,16 clamping band 3 can not take place, can avoid the uneven situation of thickness of slab of band 3.

In addition, even because of band 3 vibrates or swing wall 13 to its thickness of slab direction, 15 posture is not set at proper state and causes band 3 and sealed

roller

14,16 butt joints, owing to make sealed

roller

14,16 to rotate with the moving direction and the corresponding peripheral speed of speed of band 3, so also can not form tangible scratch on band 3.

And then, the pressure cylinder 41 of swing mechanism 37 is moved to bench roller 17 approaching directions towards the leading section that makes swing wall 18, make sealed roller 19 landline near bands 3, dwindled the interval of sealed roller 19 with respect to band 3 after, supply with inert gas G from pipeline 70 continuously to gas chamber 20.

Because the space between swing wall 18 and encirclement housing 5 medial surfaces is by

seal member

52,53,54 sealings, and spray inert gas G to bench roller 17 from gas chamber 20, so swung the space 72 that wall 18 separates, 73 only become the state that is communicated with by the little space between sealed roller 19 and bench roller 17 and the

band

3, and 73 outflows to the inert gas in space 72 from the space that cause because of the atmosphere temperature difference in

space

72,73 are suppressed.

In addition, even

arm

21,22 docks with block 57, the interval of sealed roller 19 and bench roller 17 also keeps the state above the maximum thickness of slab of band 3, so the situation of sealed roller 19 and bench roller 17 clamping bands 3 can not take place, can avoid the uneven situation of thickness of slab of band 3.

In addition, even do not cause band 3 to dock with sealed roller 19 because of band 3 is set at proper state to the posture of vibration of its thickness of slab direction or swing wall 18, owing to make sealed roller 19 to rotate, so also can on band 3, not form tangible scratch with the moving direction and the corresponding peripheral speed of speed of band 3.

And then, because

swing mechanism

35,36,37 is configured in the outside that surrounds housing 5 with driving mechanism 38,39,40, so can easily carry out the maintenance overhaul operation of these mechanisms.

In addition owing to will be connected and respectively swing

wall

13,15, between the bolster 24,25 on 18 and the sidewall that surrounds housing 5 by

seal member

28,29 sealings, so the air-tightness of encirclement housing 5 does not reduce.

Like this, at Fig. 2 to the dual roll casting machine shown in Figure 8, be subjected to the influence of liquid-bath 10, the atmosphere temperature that surrounds housing 5 inside is high more the closer to upstream one side of the mobile alignment of band 3, even the inert gas G in space 71 is from blowing out to the outside that surrounds housing 5 between chill roll 1 and the seal member 8, because

swing wall

13,15, sealed

roller

14,16 and the

swing wall

13,15 on

incidental seal member

52,53,54 inhibition inert gas G are 72 flowing to space 71 from the space, simultaneously, swing wall 18, sealed roller 19, incidental seal member 52 on the

swing wall

18,53,54, and from the inert gas G of gas chamber 20 to bench roller 17 ejections, suppress inert gas G from the space 73 to the flowing of space 72, so can suppress atmosphere through between pinch roll 4 and the seal member 9 to the inside inflow of surrounding housing 5.

Thus, can reduce the quantity delivered of the inert gas G that is used to prevent 3 oxidations of high temperature band.

Fig. 9 to Figure 11 is the figure of the 2nd example of the embodiment of expression dual roll casting machine of the present invention, and among the figure, mark has the part of the mark identical with Fig. 2 to Fig. 8 to represent an identical part.

In this dual roll casting machine, replace seal member 8 (with reference to Fig. 2), the seal member 82 that will have the hollow structure of the sealing the margin portion 81 parallel with the axis of chill roll 1 is configured on each chill roll 1, so that the outer peripheral face of sealing edge part 81 and chill roll 1 is relative and can be near the outer peripheral face that leave chill roll 1.

Seal member 82 has and is used for refrigerant (cooling water) C that will be supplied with by pipeline 83 to the inlet 84 of components interior guiding be used for outlet 86 that this refrigerant C is sent to pipeline 85 from components interior.

Be provided with stream in the inside of seal member 82 and form parts,, improve except that thermal effect to prolong the circulation distance of refrigerant C as far as possible.

In addition, seal member 82 constitutes in the mode that moves horizontally by traversing equipment 87.

Traversing equipment 87 is by constituting with the lower part: be separated with a pair of base 88 that the compartment of terrain is provided with on the axis direction of chill roll 1, on this base 88 flatly and the guiding part of laying with respect to the axis of chill roll 1 89 with meeting at right angles, be entrenched on this guiding part 89 and movably movable bracket 90, be installed in the carriage 91 on this movable bracket 90, to the outstanding arm 92 of side direction, and piston rod is attached on this arm 92 and shell is connected pressure cylinder 93 on the base 88 from this carriage 91.

Seal member 82 is attached on this carriage 91 by the pin 94 that extends up and down between carriage 91.

In addition, a pin 94 is in the logical locational gap of inserting of seal member 82, estimates to expect thermal expansion and set greatlyyer.

The expanding-contracting action of pressure cylinder 93 is delivered on carriage 91 and the movable bracket 90 from arm 92, and the sealing the margin portion 81 of seal member 82 is left with respect to the outer peripheral face of chill roll 1 is approaching.

Pressure cylinder 93 is as Fig. 9, shown in Figure 10, and seal member 82 was near chill roll 1 in the time of both can being configured to make bar outstanding, and in addition on the contrary, seal member 82 is near chill roll 1 in the time of also can being configured to bar drawn in.

Below explanation is as the action of Fig. 9 to dual roll casting machine shown in Figure 11.

Before the casting of beginning band 3, make the inside that surrounds housing 5 become non-oxidizing atmosphere earlier by inert gas G.

Then, make pressure cylinder 93 extensions and make seal member 82 approaching, the outer peripheral face of chill roll 1 and the interval of sealing the margin portion 81 are reduced into the Min. that does not hinder chill roll 1 rotation to chill roll 1.

In addition, by

pipeline

83,85 refrigerant C is circulated continuously in the inside of seal member 82.

At this moment, on the basis at the interval of outer peripheral face that dwindles chill roll 1 and sealing the margin portion 81, prevent the thermal deformation of seal member 82, so can suppress inert gas G from surrounding inside the blowing out of housing 5 to the external world with refrigerant C.

And then, as mentioned above, by

swing wall

13,15; Sealed

roller

14,16 and

seal member

52,53,54 suppress inert gas G and 72 flow to space 71 from the space, in addition, and by swing wall 18; Sealed roller 19;

Seal member

52,53,54, and the inert gas G that is sent to bench roller 17 from gas chamber 20 suppress inert gas G and 73 flow to space 72 from the space.

In other words, to dual roll casting machine shown in Figure 11, be prerequisite at Fig. 9 to suppress blowing out of inert gas G with seal member 82, add and utilize

swing wall

13,15,18; Sealed

roller

14,16,19; 52,53,54 pairs of the mobile of inert gas G of seal member suppress, thereby can reduce the quantity delivered of the inert gas G that is used to prevent 3 oxidations of high temperature band.

And then volume and internal conditions according to surrounding housing 5 also can not use sealed

roller

14,16, and reduce the quantity delivered of inert gas G with seal member 82 and sealed roller 19.

In addition, dual roll casting machine of the present invention and method of operation thereof are not limited to above-mentioned embodiment.

That is to say, can be set as the dual roll casting machine that has the 1st and the 2nd sealed roller and chill roll usefulness seal member, in addition, also can be set as and have sealed roller and bench roller and chill roll dual roll casting machine with seal member according to the operating condition of continuous casting.

And then, for example also sealed roller and bench roller can be set in place the inside of the encirclement housing between the tandem mill of pinch roll and its downstream one side.

Claims

1. dual roll casting machine, it is characterized in that, have: a pair of chill roll, band that clamping is cast continuously by this chill roll and a pair of pinch roll of sending to subsequent handling, have the left and right sides sidewall relative with the plate width direction edge part of band, and surround the encirclement housing of the band landline from the chill roll to the pinch roll, be attached to the chill roll seal member between right outer peripheral face of above-mentioned chill roll and the encirclement housing, be attached to the pinch roll seal member between right outer peripheral face of above-mentioned pinch roll and the encirclement housing, be configured in horizontal part from above-mentioned chill roll to pinch roll that carry band from, and be configured in the bench roller that surrounds enclosure interior, be configured in the 1st swing wall that surrounds enclosure interior and can approaching leave above-mentioned band, with above-mentioned chill roll abreast pivot be bearing in 1st sealed roller of the 1st swing on the wall, be configured in the 2nd swing wall that surrounds enclosure interior and can approaching leave above-mentioned band, with above-mentioned chill roll abreast pivot be bearing in 2nd sealed roller of the 2nd swing on the wall, near upstream one side of surrounding top that enclosure interior is disposed at this bench roller and pinch roll, and can with the upper surface of band near the 3rd swing wall that leaves, with bench roller almost parallel ground pivot be bearing in the 3rd the swing wall front end on the 3rd sealed roller, be installed in above-mentioned respectively the swing and respectively swing the wall seal member on the wall, supply with the gas supply mechanism of inert gas to above-mentioned encirclement enclosure interior.

2. dual roll casting machine as claimed in claim 1 has driving mechanism on the 3rd sealed roller.

3. as each described dual roll casting machine in claim 1 or 2, be provided with the block in restrict rollers gap when making the 3rd sealed roller near the bench roller corresponding with it, this gap is set at more than the maximum ga(u)ge of band.

4. the method for operation of dual roll casting machine as claimed in claim 2 makes the driving mechanism action, so that sealed roller is to rotate with the moving direction and the corresponding peripheral speed of speed of band.