WO2013168777A1 - Dispositif d'application en revêtement de bouillie et procédé d'application en revêtement de bouillie - Google Patents

Dispositif d'application en revêtement de bouillie et procédé d'application en revêtement de bouillie Download PDF

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Publication number
WO2013168777A1
WO2013168777A1 PCT/JP2013/063077 JP2013063077W WO2013168777A1 WO 2013168777 A1 WO2013168777 A1 WO 2013168777A1 JP 2013063077 W JP2013063077 W JP 2013063077W WO 2013168777 A1 WO2013168777 A1 WO 2013168777A1
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Prior art keywords
slurry
strip
belt
band
application
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PCT/JP2013/063077
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English (en)
Japanese (ja)
Inventor
木島　秀夫
裕士 原田
山口　誠
純一 鳥生
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Ｊｆｅスチール株式会社
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Application filed by Ｊｆｅスチール株式会社 filed Critical Ｊｆｅスチール株式会社
Priority to RU2014144620A priority Critical patent/RU2607407C2/ru
Priority to KR1020147030978A priority patent/KR101716944B1/ko
Priority to CN201380023908.8A priority patent/CN104271258B/zh
Priority to EP13788396.3A priority patent/EP2848319B1/fr
Priority to IN2163MUN2014 priority patent/IN2014MN02163A/en
Publication of WO2013168777A1 publication Critical patent/WO2013168777A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
    • B05B13/0463—Installation or apparatus for applying liquid or other fluent material to moving work of indefinite length
    • B05B13/0468—Installation or apparatus for applying liquid or other fluent material to moving work of indefinite length with reciprocating or oscillating spray heads
    • B05B13/0473—Installation or apparatus for applying liquid or other fluent material to moving work of indefinite length with reciprocating or oscillating spray heads with spray heads reciprocating along a straight line
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/023—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface
    • B05C11/025—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface with an essentially cylindrical body, e.g. roll or rod
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/027—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/04—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material to opposite sides of the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/26—Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
    • C21D8/1238—Flattening; Dressing; Flexing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
    • C21D8/1277—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties involving a particular surface treatment
    • C21D8/1283—Application of a separating or insulating coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/021—Apparatus for spreading or distributing liquids or other fluent materials already applied to the surface of an elongated body, e.g. a wire, a tube
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2252/00—Sheets
    • B05D2252/02—Sheets of indefinite length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials

Definitions

  • the present invention relates to a slurry coating apparatus and a slurry coating method for coating a slurry of an annealing separator for preventing seizure when performing high temperature annealing on a coil wound with a grain-oriented electrical steel sheet to the grain-oriented electrical steel sheet. .
  • grain-oriented electrical steel sheets are mainly used as iron core materials for transformers, generators, and other electrical equipment. Therefore, the grain-oriented electrical steel sheet is required to have a good surface coating in addition to good magnetic properties (iron loss).
  • the surface coating of the steel plate is made of a ceramic coating called a forsterite coating.
  • a forsterite coating When forming a forsterite film, first, a material that has been rolled to a predetermined thickness by cold rolling is used as a raw material, and an oxide film (subscale) containing silicon oxide (SiO 2 ) as a base material for this material. ). Next, after applying magnesium oxide (MgO) on the oxide film, the steel sheet is wound into a coil shape. Thereafter, in the finish annealing step, the coiled grain-oriented electrical steel sheet is heat-treated at a high temperature of 1000 ° C. or higher. Thereby, SiO 2 and MgO react on the surface of the steel sheet to form a forsterite film (Mg 2 SiO 4 film).
  • MgO applied to the surface of the steel sheet also serves as an adhesion preventing agent for preventing adhesion between coil layers in the final annealing process, it is also referred to as an annealing separator.
  • the steel sheet is flattened (planarized) to correct the shape of the steel sheet to obtain a product.
  • this annealing separator such as MgO is generally suspended in water to form a slurry. Then, on the exit side of the continuous annealing furnace in the decarburization annealing step, the supply nozzle and the squeeze roll apply this slurry so as to have a predetermined film thickness on both the upper surface and the lower surface of the strip. At this time, a liquid pool is often formed on the entrance side of the squeeze roll on the upper surface side of the belt-like body. Subsequently, after the annealing separator is dried in a drying furnace, the strip is wound to obtain a coil.
  • these supply nozzles and squeeze rolls as described in Patent Document 1, supply the slurry to the belt-like body by the supply nozzle, and then adjust the film thickness of the slurry by squeeze rolls such as a rough application roll and an application roll. Adjustable arrangement. Depending on the required accuracy of the film thickness and the installation space, only one of the coarse application roll and the application roll is installed, or a nozzle is further provided between the coarse application roll and the application roll.
  • a supply nozzle and a squeeze roll may be configured to supply the slurry.
  • Patent Document 2 there is a case where the slurry is supplied to the band by the supply nozzle after the band has passed through all the application rolls.
  • a plurality of nozzles for supplying the slurry are installed at intervals of several hundred mm in the width direction that is perpendicular to the traveling direction of the strip.
  • a saddle-like shape defect parallel to the longitudinal direction may occur in the belt-like body that is a steel plate.
  • the portion where such a shape defect has occurred does not become a product, so it must be discarded.
  • the occurrence of shape defects leads to a decrease in yield in the production of steel sheets.
  • the details of the mechanism by which this saddle-shaped defect occurs are not clear, and the development of a technique for suppressing the occurrence of this saddle-shaped defect has been demanded.
  • the present invention has been made in view of the above, and the object thereof is to suppress the occurrence of saddle-like shape defects along the longitudinal direction of a steel sheet, which are likely to occur after flattening annealing in the manufacture of a steel sheet.
  • An object of the present invention is to provide a slurry coating apparatus and a slurry coating method capable of improving the yield in the production of steel sheets.
  • a slurry application apparatus is capable of supplying the slurry to the belt-like body in a slurry application device that applies slurry to a traveling belt-like body.
  • the slurry discharge means is configured, and the relative positional relationship between the slurry discharge means and the band is approximately parallel to the surface of the band and substantially perpendicular to the traveling direction of the band.
  • the slurry is supplied to the belt-like body by the slurry discharge means while being changed.
  • the slurry application apparatus includes a pair of application means configured to apply the slurry to the surface of the belt-like body by pressing the belt-like body while pressing the belt-like body.
  • the slurry discharge means is configured to be able to swing relative to the strip in a direction substantially parallel to the surface of the strip and substantially perpendicular to the traveling direction of the strip.
  • the slurry discharge means is provided on the upstream side in the traveling direction of the belt-like body with respect to the pair of application means.
  • a second slurry discharge means configured to be able to supply the slurry to the band-like body is provided on the downstream side in the traveling direction of the band-like body with respect to the coating means.
  • the second slurry discharge means is substantially parallel to the surface of the belt and in a direction substantially perpendicular to the traveling direction of the belt. It is configured to be able to swing relative to the belt-like body.
  • the slurry discharge means is provided on the downstream side in the traveling direction of the belt-like body with respect to the pair of application means.
  • 3rd slurry discharge means comprised so that supply of the said slurry to the said strip
  • the slurry coating apparatus is characterized in that, in the above invention, the temporal change of the swing amount in the swing is a rectangular wave shape, a sine wave shape, or a triangular wave shape.
  • the slurry coating apparatus according to the present invention is characterized in that, in the above invention, the slurry coating apparatus that holds the slurry discharge means is configured to be swingable relative to the belt-like body. .
  • the oscillation frequency of the slurry discharge means is set based on a turn pitch of a coil formed by winding the strip. .
  • the slurry coating apparatus is characterized in that, in the above invention, the oscillation frequency of the slurry discharge means is set based on an even multiple of the turn pitch.
  • the belt-like body is disposed on the slurry discharge means in a direction substantially parallel to the surface of the belt-like body and substantially perpendicular to the traveling direction of the belt-like body.
  • a strip-shaped body swinging means configured to be relatively swingable, and a pair of coating units configured to be able to apply the supplied slurry to the surface of the strip-shaped body by pressing and holding the strip-shaped body And means.
  • the slurry application apparatus is the slurry application apparatus according to the above invention, wherein the slurry is pressed against the pair of application means on the downstream side along the traveling direction of the band-like body while holding the band-like body. Is provided on the surface of the belt-like body in a second pair of application means.
  • the slurry coating apparatus is configured to be capable of supplying the slurry to the strip on the downstream side along the traveling direction of the strip with respect to the pair of coating means.
  • a second slurry discharge means is provided.
  • the slurry coating apparatus is characterized in that, in the above-mentioned invention, the time variation of the swinging amount of the band-like body is a rectangular wave shape, a sine wave shape, or a triangular wave shape.
  • the slurry coating apparatus is characterized in that, in the above invention, the oscillation frequency of the strip is set based on a turn pitch of a coil formed by winding the strip.
  • the slurry coating apparatus according to the present invention is characterized in that, in the above invention, the oscillation frequency of the strip is set based on an even multiple of the turn pitch.
  • the slurry application method according to the present invention is a slurry application method in which slurry is applied to a traveling belt-like body, and is substantially parallel to the surface of the belt-like body and substantially perpendicular to the traveling direction of the belt-like body.
  • the slurry is supplied to the strip while changing the relative positional relationship between the discharge port of the slurry and the strip.
  • the slurry application method according to the present invention is the above-described invention, wherein the discharge port is relatively parallel to the surface of the strip and is substantially perpendicular to the running direction of the strip.
  • the slurry application method according to the present invention is the above-described invention, wherein the belt-like body is relative to the discharge port in a direction substantially parallel to the surface of the belt-like body and substantially perpendicular to the traveling direction of the belt-like body.
  • the slurry application method according to the present invention is the slurry application method according to the above invention, wherein after the slurry application step, the slurry is applied to the surface of the belt by holding and pressing the belt supplied with the slurry.
  • the method further includes two slurry application steps.
  • the slurry application method according to the present invention is characterized in that, in the above invention, after the slurry application step, a second slurry supply step is provided for supplying the slurry to the strip.
  • the slurry in the above invention, in the second slurry supply step, the slurry is applied in a direction substantially parallel to a surface of the strip and substantially perpendicular to a traveling direction of the strip.
  • the slurry is supplied to the belt-like body while the slurry discharge port is swung relative to the belt-like body.
  • a second slurry application step of applying the slurry onto the surface of the band by holding and pressing the band supplied with the slurry in the above invention, in the third slurry supply step for supplying the slurry to the strip and the third slurry supply step before the slurry supply step, And a second slurry application step of applying the slurry onto the surface of the band by holding and pressing the band supplied with the slurry.
  • the slurry application method according to the present invention is characterized in that, in the above-described invention, the temporal change of the swing amount in the swing is a rectangular wave shape, a sine wave shape, or a triangular wave shape.
  • the slurry application method according to the present invention is characterized in that, in the above-mentioned invention, the oscillation frequency in the oscillation is set based on a turn pitch of a coil formed by winding the strip.
  • the slurry application method according to the present invention is characterized in that, in the above invention, the oscillation frequency in the oscillation is set based on an even multiple of the turn pitch.
  • the slurry application method according to the present invention is characterized in that, in the above-mentioned invention, the temporal change in the amount of oscillation of the belt-like body is a rectangular wave shape, a sine wave shape, or a triangular wave shape.
  • the slurry application method according to the present invention is characterized in that, in the above invention, the oscillation frequency of the strip is set based on a turn pitch of a coil formed by winding the strip.
  • the slurry application method according to the present invention is characterized in that, in the above invention, the oscillation frequency of the strip is set based on an even multiple of the turn pitch.
  • the slurry coating apparatus and the slurry coating method according to the present invention there is an effect that it is possible to improve the yield in the production of steel sheets by suppressing the occurrence of saddle-like shape defects along the longitudinal direction of the steel sheets.
  • FIG. 1 is a diagram illustrating a configuration example of a slurry coating apparatus according to Embodiment 1 of the present invention.
  • FIG. 2 is a conceptual diagram showing a conventional slurry coating apparatus and a film thickness distribution of the annealing separator slurry on the surface of the strip.
  • FIG. 3A is a cross-sectional perspective view of a coil of a belt-like body to which a conventional annealing separator slurry is applied.
  • FIG. 3B is a partially enlarged cross-sectional view of a portion surrounded by a broken line in FIG. 3A.
  • FIG. 4A is a graph showing an example of swing control of the slurry supply nozzle by the slurry applying apparatus according to Embodiment 1 of the present invention.
  • FIG. 4A is a graph showing an example of swing control of the slurry supply nozzle by the slurry applying apparatus according to Embodiment 1 of the present invention.
  • FIG. 4B is a graph showing another example of the swing control of the slurry supply nozzle by the slurry applying apparatus according to Embodiment 1 of the present invention.
  • FIG. 4C is a graph showing still another example of the swing control of the slurry supply nozzle by the slurry applying apparatus according to the first embodiment of the present invention.
  • FIG. 5 is a conceptual diagram showing the slurry coating apparatus according to Embodiment 1 of the present invention and the film thickness distribution of the annealing separator slurry on the surface of the belt-like body when the slurry supply nozzle is controlled in a sine wave shape.
  • FIG. 6A is a conceptual diagram showing the slurry application apparatus according to Embodiment 1 of the present invention and the film thickness distribution of the annealing separator slurry on the surface of the belt-like body when the slurry supply nozzle is controlled to have a rectangular wave shape.
  • FIG. 6B is a partially enlarged cross-sectional view of a state in which a strip-like body coated with the annealing separator slurry in Embodiment 1 of the present invention is coiled.
  • FIG. 7A is a configuration diagram illustrating a first modification of the slurry applying apparatus according to Embodiment 1 of the present invention.
  • FIG. 7B is a configuration diagram showing a second modification of the slurry applying apparatus according to Embodiment 1 of the present invention.
  • FIG. 7C is a configuration diagram showing a third modification of the slurry applying apparatus according to Embodiment 1 of the present invention.
  • FIG. 8 is a diagram illustrating a configuration example of the slurry applying apparatus according to the second embodiment of the present invention.
  • FIG. 9A is a graph showing an example of swing control for the belt-like body according to Embodiment 2 of the present invention.
  • FIG. 9B is a graph showing another example of the swing control for the band according to the second embodiment of the present invention.
  • FIG. 9C is a graph showing still another example of the swing control for the band according to the second embodiment of the present invention.
  • FIG. 9A is a graph showing an example of swing control for the belt-like body according to Embodiment 2 of the present invention.
  • FIG. 9B is a graph showing another example of the swing control for the band according to the second embodiment of the present invention.
  • FIG. 9C is a graph showing still another example of the swing control for the band according to the second embodiment of the present invention
  • FIG. 10 is a conceptual diagram showing the slurry coating apparatus according to Embodiment 2 of the present invention and the film thickness distribution of the annealing separator slurry on the surface of the band when the band-shaped body is controlled to swing sinusoidally.
  • FIG. FIG. 11A is a concept showing a slurry coating apparatus according to Embodiment 2 of the present invention and a film thickness distribution of the annealing separator slurry on the surface of the band when the band-shaped rocking control is performed on the band.
  • FIG. FIG. 11B is a partially enlarged cross-sectional view of a state in which a strip-like body coated with the annealing separator slurry in Embodiment 2 of the present invention is coiled.
  • FIG. 12A is a configuration diagram illustrating a first modification of the slurry application apparatus according to Embodiment 2 of the present invention.
  • FIG. 12B is a configuration diagram showing a second modification of the slurry applying apparatus according to Embodiment 2 of the present invention.
  • FIG. 12C is a configuration diagram illustrating a third modification of the slurry application apparatus according to Embodiment 2 of the present invention.
  • FIG. 1 is a diagram illustrating a configuration example of a slurry coating apparatus according to Embodiment 1 of the present invention.
  • the slurry application apparatus 20 is an apparatus that applies an annealing separator slurry 4 to a steel plate, and includes a squeeze roll 2 and a slurry supply nozzle 3.
  • the slurry supply nozzle 3 is a slurry discharge means having a plurality of discharge ports for supplying the annealing separator slurry 4 to the strip 1 that is a grain-oriented electrical steel sheet.
  • the squeeze roll 2 is a pair of application means that squeeze the annealing separator slurry 4 applied on the strip 1 to a predetermined thickness.
  • the slurry supply nozzle 3 is substantially parallel to the surface of the strip 1 and is generally perpendicular to the direction in which the strip 1 is sent out (the travel direction of the strip 1). In this direction, that is, in the width direction of the strip 1, it is configured to be able to swing relative to the strip 1.
  • the squeeze roll 2 is The band-like body 1 is pressed (clamped) while being gripped in the thickness direction, and the annealing separator slurry 4 applied to the surface of the band-like body 1 is squeezed to a predetermined film thickness.
  • the strip 1 is subjected to various processes such as a finish annealing process (secondary recrystallization annealing process), a coating process, and a flattening annealing process, and finally becomes a product of an electromagnetic steel sheet.
  • the present inventors have studied the saddle-like shape defect formed on the surface of the strip 1 after the flattening annealing in the case of using a conventional slurry coating apparatus. As a result, the present inventors have found that a certain correlation is recognized between the generation position along the width direction of the strip 1 and the installation position along the width direction of the slurry supply nozzle 3 with respect to the shape defect. I found out. Then, the inventors pay attention to the fact that the film thickness of the annealing separator slurry 4 has a non-uniform distribution along the width direction of the strip 1, and this film thickness distribution affects the shape defect. I came to remember.
  • FIG. 2 shows the configuration of this conventional slurry coating apparatus and the width direction of the strip 1 of the annealing separator slurry 4 after the annealing separator slurry 4 on the strip 1 is narrowed to a predetermined film thickness. The film thickness distribution is shown.
  • the film thickness of the annealing separator slurry 4 is set to each of the slurry supply nozzles 103. This is considered to be large at a position close to the discharge port and small at a position far away. Therefore, in the conventional slurry coating apparatus 100, the film thickness distribution of the annealing separator slurry 4 along the width direction of the strip 1 and the film thickness distribution of the annealing separator slurry 4 along the longitudinal direction of the strip 1 are obtained. I was in control.
  • the thickness difference of the film thickness of the annealing separator slurry 4 on the surface of the strip 1 is within a predetermined range.
  • the thickness difference of the film thickness of the annealing separator slurry 4 falls within a predetermined range as described above, the occurrence of the above-described bowl-shaped shape defect cannot be avoided.
  • the present inventors conducted further intensive studies, and further examined the influence of uneven application of the annealing separator slurry 4 on the occurrence of shape defects.
  • FIG. 3A is a cross-sectional perspective view of a coil of a belt-like body to which a conventional annealing separator slurry is applied.
  • FIG. 3A shows a cross section along the width direction of the strip 1 in a state where the strip 1 coated with the annealing separator slurry 4 is wound up by the slurry supply nozzle 103 to form a coil 10.
  • FIG. 3B is a partially enlarged cross-sectional view showing a cross section of a portion surrounded by a broken line in FIG. 3A.
  • the peak of the annealing separator slurry 4 on the surface of the strip 1 is formed as shown in FIG. 3B.
  • the coils 10 are sequentially laminated in the radial direction of the circle in the cross section along the longitudinal direction of the strip 1, so-called build-up occurs, and the annealing separator slurry 4 protrudes (inside the broken line in FIG. 3B).
  • the buildup in the peak part of the annealing separator slurry 4 on the surface of the strip 1 causes the shape defect of the strip 1 during the finish annealing process.
  • the position of the streak pattern due to the coating unevenness that is visually recognized after supplying the annealing separator slurry 4 to the surface of the strip 1 does not necessarily match the position of the shape defect formed on the surface of the strip 1.
  • the present inventors have a non-uniform film thickness rather than completely suppressing the occurrence of a non-uniform film thickness distribution of the annealing separator slurry 4 along the width direction of the strip 1 that is unavoidable. Recalling that the occurrence of shape defects can be suppressed if the distribution of the film thickness is made as gentle as possible, or the build-up when the strip 1 is made into a coil can be suppressed on the premise of the occurrence of the distribution.
  • the slurry application device 20 is configured so that the slurry supply nozzle 3 having a plurality of discharge ports is parallel to the surface of the band 1 and the band 1 A configuration is adopted in which rocking is performed relative to the band 1 along a direction perpendicular to the traveling direction, that is, the width direction of the band 1.
  • the slurry supply nozzle 3 discharges and supplies the annealing separator slurry 4 to the surface of the band 1 while swinging relative to the band 1 along the width direction of the band 1.
  • the slurry supply nozzle 3 changes the relative positional relationship between the discharge port and the strip 1 along the width direction of the strip 1 over time, while annealing separator slurry with respect to the strip 1. 4 can be supplied.
  • FIG. 4A, FIG. 4B, and FIG. 4C are all graphs showing an example of a control method for changing the amount of rocking when the slurry supply nozzle 3 is rocked over time.
  • FIG. 5 is a conceptual diagram showing the slurry coating apparatus according to Embodiment 1 of the present invention and the film thickness distribution of the annealing separator slurry on the surface of the belt-like body when the slurry supply nozzle is controlled in a sine wave shape.
  • FIG. 5 shows the thickness distribution of the annealing separator slurry 4 on the surface of the strip 1 when the swing of the slurry supply nozzle 3 is controlled based on the configuration diagram of the slurry application device 20 and the graph shown in FIG. 4A. And a graph showing.
  • the slurry supply nozzle 3 swings in a sine wave shape as shown in FIG. 4A or swings in a triangular wave shape as shown in FIG. 4B along the width direction of the strip 1.
  • the film thickness distribution of the annealing separator slurry 4 along the width direction of the strip 1 shakes the slurry supply nozzle 103 described above.
  • the supply of the annealing separator slurry 4 is averaged with respect to the width direction of the strip 1 between the plurality of discharge ports of the slurry supply nozzle 3.
  • the pitch T shown in FIGS. 4A and 4B is preferably 1 to 150 seconds, and preferably 2 to 120 seconds.
  • the annealing separator slurry 4 is gently applied to the surface of the strip 1 and annealed as compared to the non-uniformity of the film thickness distribution of the annealing separator slurry 4 shown in FIG. Since the valleys and peaks of the separating agent slurry 4 are gently formed, the thickness difference in the film thickness distribution of the annealing separating agent slurry 4 is relaxed and becomes gentle. As a result, it is possible to prevent the occurrence of shape defects on the surface of the strip 1.
  • the triangular wave-like folded end portion has a smooth substantially triangular wave shape waveform as shown in FIG.
  • a trapezoidal wave shape may be obtained by stopping at this end portion for a finite period of time.
  • these oscillations are also included in the triangular wave oscillation.
  • FIG. 6A is a conceptual diagram showing the slurry application apparatus according to Embodiment 1 of the present invention and the film thickness distribution of the annealing separator slurry on the surface of the belt-like body when the slurry supply nozzle is controlled to have a rectangular wave shape.
  • FIG. 6A shows two layers of the annealing separator slurry 4 on the surface of the strip 1 when the swing amount of the slurry supply nozzle 3 is controlled based on the configuration diagram of the slurry application device 20 and the graph shown in FIG. 4C. And a graph showing the film thickness distribution.
  • FIG. 6A shows two layers of the annealing separator slurry 4 on the surface of the strip 1 when the swing amount of the slurry supply nozzle 3 is controlled based on the configuration diagram of the slurry application device 20 and the graph shown in FIG. 4C. And a graph showing the film thickness distribution.
  • FIG. 6A shows two layers of the annealing separator slurry 4 on the surface of the strip 1 when the
  • FIG. 6B is a partially enlarged cross-sectional view of a state in which a strip-like body coated with the annealing separator slurry in Embodiment 1 of the present invention is coiled.
  • FIG. 6B is a diagram in the case where the annealing separator slurry 4 is applied to the surface of the strip 1 as shown in FIG. 6A and then the strip 1 is wound into a coil to form the coil 10 shown in FIG. 3A.
  • a laminated structure of the coil 10 corresponding to 3B is shown.
  • the slurry supply nozzle 3 swings in a rectangular wave shape along the width direction of the strip 1 as shown in FIG. 4C, when the strip 1 is used as the coil 10 as shown in the graph of the film thickness distribution in FIG.
  • the crests and troughs of the annealing separator slurry 4 overlap between the two layers of the laminated strip 1.
  • the pitch T shown in FIG. 4C is preferably 1 to 150 seconds, and preferably 2 to 120 seconds. This is because if the pitch T in the case of controlling the time variation of the swing amount of the slurry supply nozzle 3 to be a rectangular wave is too shorter than 1 second, the film thickness distribution of the annealing separator slurry 4 as shown in FIG. If it is longer than 150 seconds, the amount of deviation per turn when the strip 1 is used as the coil 10 becomes small, and the crest and trough of the annealing separator slurry 4 overlap between the two layers. This is because a build-up as shown in FIG. 3B occurs.
  • the peaks and valleys in the film thickness distribution of the annealing separator slurry 4 are sequentially along the radial direction of the circle of the section along the longitudinal direction of the strip 1 in the coil 10. Since they are stacked, the build-up described above can be prevented. Therefore, it is possible to suppress the occurrence of a shape defect in the band 1.
  • the swing of the slurry supply nozzle 3 it is simple to swing only the slurry supply nozzle 3, but the present invention is not necessarily limited thereto.
  • the slurry supply nozzle 3 is swung with respect to the strip 1 by swinging the entire slurry application device 20 holding the slurry supply nozzle 3 relative to the traveling strip 1.
  • incidental equipment such as a coating roll provided in the slurry coating apparatus 20 may be swung together.
  • FIG. 7A, FIG. 7B, and FIG. 7C are configuration diagrams respectively showing a first modification, a second modification, and a third modification of the slurry applying apparatus according to the first embodiment.
  • the slurry application device 21 includes a rough application roll 2a, a pair of backup rolls 2b, a pair of application rolls 2c, and a pair of rough application rolls. It has a nozzle 3a.
  • the pair of pre-rough application roll nozzles 3 a is a pair of slurry discharge means for supplying the annealing separator slurry 4 to both surfaces of the strip 1.
  • the pair of rough coating rolls 2a presses (nips) the belt-shaped body 1 while gripping the belt-shaped body 1 in the thickness direction, and roughens the annealing separator slurry 4 supplied by the nozzle 3a before the rough coating roll on both surfaces of the belt-shaped body 1. It is a pair of application means to apply.
  • the pair of coating rolls 2 c is a coating unit that squeezes the coarsely coated annealing separator slurry 4 supported by a pair of backup rolls 2 b provided on both sides of the strip 1. And in the slurry application apparatus 21 by this 1st modification, the nozzle 3a before rough
  • the nozzle 3a before the rough application roll discharges and supplies the annealing separator slurry 4 to both surfaces of the strip 1 while swinging in this way.
  • the nozzle 3a before the rough coating roll is annealed and separated from the strip 1 while changing the relative positional relationship between the discharge port and the strip 1 along the width direction of the strip 1 over time.
  • the agent slurry 4 can be supplied.
  • the slurry application device 22 according to the second modification example of the first embodiment is similar to the slurry application unit 21 or the second or third method as the slurry application apparatus 21 according to the first modification example described above.
  • the slurry discharge means or the downstream side of the nozzle 3a before the coarse application roll as the slurry discharge means and upstream of the pair of application rolls 2c in the traveling direction of the band 1 It has a pre-application roll nozzle 3b as a third or second slurry discharge means.
  • At least any one of the nozzle 3a before a rough application roll and the nozzle 3b before an application roll is set to the strip
  • it is configured to be relatively swingable.
  • At least one of the pre-coating roll nozzle 3a and the pre-coating roll nozzle 3b discharges and supplies the annealing separator slurry 4 to both surfaces or one surface of the strip 1 while swinging in this manner.
  • At least one of the nozzle 3a before the rough application roll and the nozzle 3b before the application roll changes the relative positional relationship between the discharge port and the strip 1 along the width direction of the strip 1 over time. While changing, the annealing separator slurry 4 can be supplied to the strip 1.
  • the slurry coating apparatus 23 according to the third modification of the first embodiment has a configuration similar to that of the slurry coating apparatus 21 according to the first modification described above, and further includes a pair of On the downstream side in the traveling direction of the strip 1 of the coating roll 2c, there is a post-rolling nozzle 3c as a second slurry discharge means.
  • the slurry application device 23 according to the third modification at least one of the nozzle 3a before the rough application roll and the nozzle 3c after the application roll is in the width direction of the strip 1 (in FIG. 7C, the direction perpendicular to the paper surface). And can be swung relative to the belt-like body 1.
  • At least one of the nozzle 3a before the rough application roll and the nozzle 3c after the application roll discharges and supplies the annealing separator slurry 4 to both surfaces or one surface of the strip 1 while swinging in this way.
  • at least one of the nozzle 3a before the coarse application roll and the nozzle 3c after the application roll changes the relative positional relationship between the discharge port and the strip 1 along the width direction of the strip 1 over time. While changing, the annealing separator slurry 4 can be supplied to the strip 1.
  • Example 1 to 30 and Comparative Example 1 In Examples 1 to 30 and Comparative Example 1, first, a cold-rolled sheet of grain-oriented electrical steel sheet having a final sheet thickness of 0.3 mm containing 3.4% by weight of silicon (Si) is used as the strip 1. And after performing decarburization annealing with respect to this strip
  • the coating amount of the annealing separator slurry 4 per one surface is oxidized on both surfaces of the strip 1 by setting the coating amount of the annealing separator slurry 4 per side to 7.0 g / m 2 by the nozzle 3a before the rough coating roll and the nozzle 3b before the coating roll. Apply magnesium (MgO). Then, after winding the strip
  • At least one of the pre-coating roll nozzle 3a and the pre-coating roll nozzle 3b swings when the annealing separator slurry 4 is applied to the surface of the strip 1 as follows. Do.
  • Examples 1 to 5 only the nozzle 3a before the rough coating roll is used, and the pitch T shown in FIG. 4A is set to 1 second, 2 seconds, 60 seconds, 120 seconds, and 150 seconds, respectively. Control and swing.
  • Examples 6 to 10 only the nozzle 3b before the coating roll is used, and the pitch T shown in FIG. 4A is set to 1 second, 2 seconds, 60 seconds, 120 seconds, and 150 seconds, respectively, and the time variation of the swing amount is sinusoidal. Control and swing.
  • Examples 11 to 15 only the nozzle 3a before the coarse application roll is set to have a pitch T shown in FIG. 4C of 1 second, 2 seconds, 60 seconds, 120 seconds, and 150 seconds, respectively. Control and swing.
  • Examples 16 to 20 only the nozzle 3b before the application roll is set to have the pitch T shown in FIG. 4C as 1 second, 2 seconds, 60 seconds, 120 seconds, and 150 seconds, respectively, and the change over time in the amount of rocking is made into a rectangular wave shape. Control and swing.
  • both the coarse coating roll pre-nozzle nozzle 3a and the pre-coating roll nozzle 3b have the pitch T shown in FIG. 4A as 1 second, 2 seconds, 60 seconds, 120 seconds, and 150 seconds, respectively.
  • the time change is controlled in a sine wave shape and oscillated.
  • both the coarse coating roll pre-nozzle nozzle 3a and the pre-coating roll nozzle 3b have the pitch T shown in FIG.
  • At least one of the nozzle before rough coating roll 3a and the nozzle before coating roll 3b is set to a pitch T of 2 to 120. It can be seen that by applying the annealing separator slurry 4 while being swung as seconds, shape defects do not occur in the grain-oriented electrical steel sheet. Accordingly, it can be seen that the pitch T in the oscillation of the slurry supply nozzle 3 is preferably 2 to 120 seconds.
  • Example 31 to 36 and Comparative Example 2 In Examples 31 to 36 and Comparative Example 2, first, a cold rolled sheet of a grain-oriented electrical steel sheet having a final sheet thickness of 0.23 mm containing 3.4% by weight of silicon (Si) is used as the strip 1. And after performing decarburization annealing with respect to this strip
  • the coating amount of the annealing separator slurry 4 per one surface is oxidized on both surfaces of the strip 1 by setting the coating amount of the annealing separator slurry 4 per side to 7.0 g / m 2 by the nozzle 3a before the rough coating roll and the nozzle 3b before the coating roll. Apply magnesium (MgO). Then, after winding the strip
  • the effect of swinging the coating nozzle of the annealing separator slurry 4 in the present invention in the steel plate width direction is to disperse minute fluctuations in the coating amount of the annealing separator slurry 4 due to the arrangement of the coating nozzles in the steel plate width direction. This is to promote the homogenization of the coating amount of the annealing separator slurry 4 on the steel plate. Furthermore, since this steel sheet is wound after application of the annealing separator slurry 4 to form a coil, the combination of the coating amount on the steel sheet of the annealing separator slurry 4 adjacent to or adjacent to the radial direction of this coil is made constant. It is considered more desirable to do so.
  • the coating nozzle of the annealing separator slurry 4 is not swung for one cycle every one turn pitch, but is swung for one cycle every two turn pitches.
  • the present inventors have found that there is a possibility that the total amount of the annealing separator slurry 4 applied between the layers of the coiled steel sheet may be further homogenized in the width direction of the steel sheet.
  • the ratio (V / 2L) of the line speed V of the strip 1 to twice the turn pitch L of the coil 10 is defined as the turn pitch frequency (unit: [Hz]).
  • the line speed V and the coil diameter of the coil 10 were set so that the turn pitch frequency was 0.665 Hz.
  • the oscillation separating agent slurry 4 was applied to the surface of the strip 1 by changing the oscillation frequency of the nozzle 3a before the rough application roll within a range of 0.010 Hz to 1.000 Hz.
  • fluctuation amount of the nozzle 3a before a rough application roll was controlled to the sine wave form.
  • Comparative Example 2 the annealing separator slurry 4 was applied to the surface of the strip 1 without swinging the nozzle 3a before the rough application roll, as in the prior art.
  • Table 2 shows the inspection results of the shape defects of the band 1 in each of the above Examples 31 to 36 and Comparative Example 2.
  • Example 31 to 36 the result in the case where the turn pitch frequency is 0.665 Hz is shown. However, even if the turn pitch frequency is a value other than 0.665 Hz, the oscillation of the nozzle 3a before the rough coating roll is performed. By bringing the frequency closer to the turn pitch frequency, the same result as that obtained when the turn pitch frequency was 0.665 Hz was obtained.
  • the turn pitch frequency was set based on twice the turn pitch as described above, and the oscillation of the pre-coating roll nozzle 3a was controlled based on this turn pitch frequency.
  • the turn pitch frequency was set based on coating conditions based on such a concept, that is, an even multiple of the turn pitch. The same effect was obtained when the rough coating roll pre-nozzle 3a was swung according to the turn pitch frequency.
  • the slurry supply nozzle 3 is arranged in the width direction of the strip 1.
  • the unevenness of the film thickness distribution of the annealing separator slurry 4 along the width direction can be made smooth, or even when the strip 1 is wound up to form the coil 10, Can be prevented.
  • the slurry discharge means such as the slurry supply nozzle 3 is swung relative to the band 1 along the width direction of the band 1 so that the band 1 and the slurry discharge means
  • the annealing separator slurry 4 was supplied to the band 1 while changing the relative positional relationship with the time along the width direction of the band 1.
  • the belt-like body 1 is swung relative to the slurry discharge means along the width direction of the belt-like body 1 so that the belt-like body 1 and the slurry discharge means are relatively moved.
  • the annealing separator slurry 4 is supplied to the band 1 while changing the positional relationship along the width direction of the band 1 over time.
  • FIG. 8 is a diagram illustrating a configuration example of the slurry applying apparatus according to the second embodiment of the present invention.
  • the slurry applying apparatus 30 is an apparatus that applies an annealing separator slurry to a steel plate, and includes a squeeze roll 12, a slurry supply nozzle 13, and a belt-like body transport roll 15. .
  • the slurry supply nozzle 13 is a slurry discharge means having a plurality of discharge ports for supplying the annealing separator slurry 4 to the strip 1 that is a grain-oriented electrical steel sheet.
  • the squeeze roll 12 is a pair of coating means that sandwich the strip 1 in the thickness direction and squeeze the annealing separator slurry 4 applied on the strip 1 to a predetermined thickness.
  • the belt-shaped body transporting roll 15 is a belt-shaped body transporting unit configured to be able to transport the belt-shaped body 1 by rotating around the center axis of a circle in the column, for example, in a cylindrical shape. .
  • the squeeze roll 12 and the belt-like body transporting roll 15 in the second embodiment are substantially parallel to the surface of the belt-like body 1 and substantially perpendicular to the traveling direction of the belt-like body 1, That is, the strip-shaped body swinging means is configured to be able to swing the strip-shaped body 1 relative to the slurry discharge means in the width direction of the strip-shaped body 1.
  • the slurry supply nozzle 13 discharges and supplies the annealing separator slurry 4 to the surface of the strip 1.
  • the squeeze roll 12 is pressed while holding the strip 1 in its thickness direction, and the annealing separator slurry 4 applied to the surface of the strip 1 is squeezed to a predetermined thickness.
  • the strip 1 is subjected to various processes such as a finish annealing process (secondary recrystallization annealing process), a coating process, and a flattening annealing process, and finally becomes a product of an electromagnetic steel sheet.
  • the present inventors examined the saddle-like shape defect formed on the surface of the strip 1 after the flattening annealing step, as in the first embodiment. As a result, the present inventors have found that a certain correlation is recognized between the generation position along the width direction of the strip 1 and the installation position along the width direction of the slurry supply nozzle 13 with respect to the shape defect. I found out. Then, the inventors pay attention to the fact that the film thickness of the annealing separator slurry 4 has a non-uniform distribution along the width direction of the strip 1, and this film thickness distribution affects the shape defect. I came to remember.
  • the film thickness of the annealing separator slurry 4 is determined by the slurry supply nozzle. 103 becomes larger at a position close to each of the discharge ports, and becomes smaller at a position far away. For this reason, in the conventional slurry coating apparatus 100, as described above, the film thickness distribution of the annealing separator slurry 4 along the width direction of the strip 1 and the annealing separator slurry 4 along the longitudinal direction of the strip 1. The film thickness distribution was controlled.
  • the thickness difference of the film thickness of the annealing separator slurry 4 on the surface of the strip 1 is within a predetermined range.
  • the thickness difference of the film thickness of the annealing separator slurry 4 falls within a predetermined range as described above, the occurrence of the above-described bowl-shaped shape defect cannot be avoided.
  • the application unevenness of the annealing separator slurry 4 composed of a crest portion having a relatively large film thickness and a trough portion having a relatively small film thickness is as described above. Since this is caused by the position of the discharge port, it is considered to be an inevitable phenomenon.
  • the present inventors conducted further intensive studies, and further examined the influence of uneven application of the annealing separator slurry 4 on the occurrence of shape defects. As a result, the present inventors completely suppress the occurrence of non-uniform film thickness distribution of the annealing separator slurry 4 along the width direction of the strip 1 that is unavoidable, as in the first embodiment. If it is possible to make the film thickness distribution as gentle as possible or to suppress the build-up when the strip 1 is made into a coil, assuming that a non-uniform film thickness distribution occurs, Recalling that the occurrence can be suppressed.
  • the slurry application device 30 causes the band 1 to be parallel to the surface of the band 1 by the squeeze roll 12 and the band transport roll 15.
  • a configuration is adopted in which the slurry supply nozzle 13 is swung relative to the direction perpendicular to the traveling direction of the strip 1, that is, along the width direction of the strip 1.
  • the squeeze roll 12 and the belt-like body transporting roll 15 swing the belt-like body 1 relative to the slurry supply nozzle 13 along the width direction of the belt-like body 1, and the slurry supply nozzle 13 discharges and supplies the annealing separator slurry 4 to the surface of the belt-like body 1 that travels with this rocking motion.
  • the slurry supply nozzle 13 changes the relative positional relationship between the discharge port and the strip 1 along the width direction of the strip 1 over time, while annealing separator slurry with respect to the strip 1. 4 can be supplied.
  • FIG. 9A, FIG. 9B, and FIG. 9C each show an example of the change over time of the swing amount in the swing control for the strip 1 when the strip 1 is swung by the squeeze roll 12 and the strip transport roll 15. It is a graph.
  • FIG. 10 shows the slurry coating apparatus according to Embodiment 2 of the present invention and the film thickness distribution of the annealing separator slurry on the surface of the band when the band is subjected to sine wave swing control.
  • the squeeze roll 12 and the belt-like body transporting roll 15 swing the belt-like body 1 along the width direction in a sine wave shape as shown in FIG. 9A or in a triangular wave shape as shown in FIG. 9B. .
  • the film thickness of the annealing separator slurry 4 along the width direction of the strip 1 can be understood by comparing the broken line portion and the solid line portion shown in the graph of the film thickness distribution of the annealing separator slurry 4 in FIG.
  • the distribution is gentle compared to the conventional case (see the broken line portion in the graphs of FIGS. 2 and 10) in which the annealing separator slurry 4 is discharged in a state where the belt-like body 1 is conveyed without being swung. Become.
  • the rocking width of the strip 1 shown in FIG. 10 is about 1 ⁇ 2 of the interval between the adjacent discharge ports of the slurry supply nozzle 13.
  • the supply of the annealing separator slurry 4 can be averaged with respect to the width direction of the strip 1 between the plurality of discharge ports of the slurry supply nozzle 13.
  • the pitch T as the oscillation period of the strip 1 shown in FIGS. 9A and 9B is preferably 1 to 150 seconds, and preferably 2 to 120 seconds. Accordingly, as shown in FIG. 10, the annealing separator slurry 4 is gently applied to the surface of the strip 1 and annealed as compared to the non-uniformity of the film thickness distribution of the annealing separator slurry 4 shown in FIG. Valleys and peaks of the separating agent slurry 4 are gently formed. Therefore, the thickness difference in the film thickness distribution of the annealing separator slurry 4 is relaxed, and as a result, the occurrence of shape defects on the surface of the strip 1 can be prevented.
  • the triangular wave-like folded end has a substantially triangular wave-like waveform. Or a trapezoidal wave when stopped at this end for a finite period of time, these oscillations are also included in the triangular wave oscillation.
  • FIG. 11A shows the slurry coating apparatus according to Embodiment 2 of the present invention and the film thickness distribution of the annealing separator slurry on the surface of the band when the band-shaped rocking control is performed on the band.
  • FIG. FIG. 11A shows two layers of the annealing separator slurry 4 on the surface of the band 1 when the swing control is performed on the band 1 based on the configuration diagram of the slurry application device 30 and the graph shown in FIG. 9C. And a graph showing the film thickness distribution.
  • FIG. 11B is a partially enlarged cross-sectional view of a state in which a strip-like body coated with the annealing separator slurry in Embodiment 2 of the present invention is coiled.
  • FIG. 11B shows a coil corresponding to FIG. 3B when the surface of the strip 1 is coated with the annealing separator slurry 4 as shown in FIG. 11A and then wound into a coil to form the coil 10 shown in FIG. 3A.
  • Ten stacked structures are shown.
  • the swinging width of the belt-like body 1 is about 1 ⁇ 2 of the interval between adjacent discharge ports among the plurality of discharge ports of the slurry supply nozzle 13.
  • the pitch T which is the oscillation cycle of the strip 1 shown in FIG. 9C, is preferably 1 to 150 seconds, and preferably 2 to 120 seconds. This is because if the pitch T in the case of controlling the change in the amount of fluctuation of the strip 1 in a rectangular wave shape is too shorter than 1 second, the film thickness distribution of the annealing separator slurry 4 as shown in FIG. If it remains and is longer than 150 seconds, the amount of deviation per turn when the strip 1 is used as the coil 10 is small, and the peaks and valleys of the annealing separator slurry 4 are appropriately overlapped between the two layers. This is because the build-up shown in FIG. 3B occurs.
  • the moving speed of the strip 1 is finite and it is difficult to move the strip 1 instantaneously along its width direction. Therefore, the oscillation of the strip 1 itself has a substantially trapezoidal wave shape, but such control of the oscillation is also included in the rectangular wave oscillation.
  • the peaks and valleys in the film thickness distribution of the annealing separator slurry 4 are sequentially along the radial direction of the circle of the cross section along the longitudinal direction of the strip 1 in the coil 10. Since the layers are alternately stacked, the build-up described above can be prevented. Therefore, it is possible to suppress the occurrence of a shape defect in the band 1.
  • FIG. 12A, FIG. 12B, and FIG. 12C are configuration diagrams respectively showing a first modification, a second modification, and a third modification of the slurry applying apparatus according to the second embodiment.
  • the slurry coating apparatus 31 includes a pair of rough coating rolls 12a, a pair of backup rolls 12b, a pair of coating rolls 12c, and a pair of rough coatings. It has a pre-roll nozzle 13a.
  • the pair of pre-rough application roll nozzles 13 a are a pair of slurry discharge means for discharging the annealing separator slurry 4 to both surfaces of the strip 1.
  • the pair of rough coating rolls 12a presses (nips) the belt-shaped body 1 while gripping the belt-shaped body 1 in the thickness direction, and roughens the annealing separator slurry 4 supplied by the nozzle 13a before the rough coating roll on both surfaces of the belt-shaped body 1. It is a pair of application means to apply.
  • the pair of application rolls 12c are supported by a pair of backup rolls 12b provided on both sides of the strip 1 and are pressed (sandwiched) while gripping the strip 1 in the thickness direction to perform rough coating annealing. It is a second pair of application means for squeezing the separating agent slurry 4.
  • belt-shaped object conveyance roll (not shown), the rough application roll 12a and the application
  • it is configured to be able to swing relative to the pre-rough coating roll nozzle 13 a along the width direction of the band 1 (in FIG. 12A, the direction perpendicular to the paper surface). While such a belt-like body swinging means swings the belt-like body 1 relative to the coarse coating roll pre-nozzle 13a along the width direction of the belt-like body 1, the coarse coating roll pre-roller nozzle 13a swings.
  • the annealing separator slurry 4 is discharged and supplied to both surfaces of the strip 1 that travels with the belt. Thereby, the nozzle 13a before the rough coating roll is annealed and separated from the strip 1 while changing the relative positional relationship between the discharge port and the strip 1 along the width direction of the strip 1 over time.
  • the agent slurry 4 can be supplied.
  • the slurry application device 32 according to the second modification of the second embodiment has the same configuration as the slurry application device 31 according to the first modification described above, and A second slurry is formed on one surface side of the strip 1 along the traveling direction of the strip 1 on the downstream side of the pre-rough coating roll nozzle 13a as the slurry discharge means and the upstream of the pair of coating rolls 12c. It has a pre-application roll nozzle 13b as a discharge means. Also in the slurry coating device 32, the belt-shaped body 1 is provided with a belt-shaped body transporting roll (not shown), the rough coating roll 12a and the coating roll 12c, and, if necessary, the backup roll 12b.
  • Such a belt-like body swinging means swings the belt-like body 1 relative to the coarse coating roll pre-nozzle 13 a and the coating roll pre-nozzle 13 b along the width direction of the strip 1, while the coarse coating roll pre-nozzle 13a and the nozzle 13b before the application roll discharge and supply the annealing separator slurry 4 to both surfaces or one surface of the strip 1 that travels with this swing.
  • the pre-rough application roll nozzle 13a and the pre-application roll nozzle 13b change the relative positional relationship between the discharge port and the belt 1 along the width direction of the belt 1 over time, An annealing separator slurry 4 can be supplied to the body 1.
  • either the pre-rough application roll nozzle 13a or the pre-application roll nozzle 13b is swung integrally with the squeeze roll, that is, the rough application roll. Only one of the front nozzle 13a and the application roll front nozzle 13b may swing relative to the band 1.
  • the slurry application device 33 according to the third modification of the second embodiment has the same configuration as the slurry application device 31 according to the first modification described above, and A post-application-roll nozzle 13c as a second slurry discharge means is provided on the other surface side of the band-like body 1 on the downstream side of the pair of application rolls 12c along the traveling direction of the band-like body 1.
  • the belt-shaped body 1 is a strip-shaped body conveying roll (not shown), the rough coating roll 12a and the coating roll 12c, and, if necessary, the backup roll 12b as the belt-shaped body rocking means.
  • Such a belt-like body swinging means swings the belt-like body 1 relative to the coarse coating roll pre-nozzle 13a and the post-coating roll post-nozzle 13c along the width direction of the belt-like body 1, while the coarse coating roll pre-nozzle nozzle. 13a and the nozzle 13c after an application roll discharge and supply the annealing separation agent slurry 4 to both surfaces or one surface of the strip 1 that travels with this swing.
  • the nozzle 13a before the rough application roll and the nozzle 13c after the application roll change the relative positional relationship between the discharge port and the band 1 along the width direction of the band 1 with time, and change the band shape.
  • An annealing separator slurry 4 can be supplied to the body 1.
  • either the pre-coating roll nozzle 13a or the post-coating roll nozzle 13c is swung integrally with the squeeze roll, that is, the rough coating roll. Only one of the front nozzle 13a and the post-application roll nozzle 13c may swing relative to the band 1.
  • Example 37 to 51 and Comparative Example 3 In Examples 37 to 51 and Comparative Example 3, first, a cold-rolled sheet of grain-oriented electrical steel sheet having a final sheet thickness of 0.3 mm containing 3.4% by weight of silicon (Si) was used as the strip 1. And after performing decarburization annealing with respect to this strip
  • the coating amount of the annealing separator slurry 4 per one surface is oxidized on both surfaces of the strip 1 by setting the coating amount of the annealing separator slurry 4 per one side to 7.0 g / m 2 by the nozzle 13a before the rough coating roll and the nozzle 13b before the coating roll. Apply magnesium (MgO). Then, after winding the strip
  • the swing control of the strip 1 when the annealing separator slurry 4 is applied to the surface of the strip 1 is performed as follows.
  • the pitch T shown in FIG. 9A is set to 1 second, 2 seconds, 60 seconds, 120 seconds, and 150 seconds, respectively, and swing control is performed on the strip 1 in a sinusoidal shape.
  • the pitch T shown in FIG. 9B is set to 1 second, 2 seconds, 60 seconds, 120 seconds, and 150 seconds, respectively, and swing control is performed on the strip 1 in a triangular wave shape.
  • the belt T is controlled to be swung in a rectangular wave shape with the pitch T shown in FIG. 9C set to 1 second, 2 seconds, 60 seconds, 120 seconds, and 150 seconds, respectively.
  • the annealing separator slurry 4 is applied to the surface of the band 1 without causing the band 1 to swing as in the conventional example.
  • Table 3 is a table showing the results of Examples 37 to 51 and Comparative Example 3 described above.
  • the annealing separator slurry 4 was applied with the pitch T set to 2 to 120 seconds while the strip 1 was swung.
  • the pitch T in the swing control for the band 1 is preferably 2 to 120 seconds.
  • Example 52 to 57 and Comparative Example 4 In Examples 52 to 57 and Comparative Example 4, first, a cold-rolled sheet of grain-oriented electrical steel sheet having a final sheet thickness of 0.23 mm containing 3.4% by weight of silicon (Si) is used as the strip 1. And after performing decarburization annealing with respect to this strip
  • the coating amount of the annealing separator slurry 4 per one surface is oxidized on both surfaces of the strip 1 by setting the coating amount of the annealing separator slurry 4 per one side to 7.0 g / m 2 by the nozzle 13a before the rough coating roll and the nozzle 13b before the coating roll. Apply magnesium (MgO). Then, after winding the strip
  • the effect of swinging the strip 1 in the width direction of the steel plate by the strip swinging means in the present invention is that a minute variation in the coating amount of the annealing separator slurry 4 due to the arrangement of the coating nozzle is caused by the strip 1.
  • By dispersing in the width direction of the steel sheet it is to promote the uniform application amount of the annealing separator slurry 4 on the strip 1.
  • belt-shaped body 1 is wound up after application
  • the belt-like body 1 is not swung for one cycle every one turn pitch, but is swung for one cycle every two turn pitches.
  • the present inventors have found that there is a possibility that the total amount of the annealing separator slurry 4 applied between the layers of the coiled steel sheet may be further homogenized in the width direction of the steel sheet.
  • the ratio (V / 2L) of the line speed V of the strip 1 to twice the turn pitch L of the coil 10 is defined as the turn pitch frequency (unit: [Hz]).
  • the line speed V and the coil diameter of the coil 10 were set so that the turn pitch frequency was 0.665 Hz.
  • the swinging frequency of the strip 1 was changed within the range of 0.010 Hz to 1.000 Hz, and the annealing separator slurry 4 was applied to the surface of the strip 1.
  • belt-shaped body 1 was controlled to the sine wave shape.
  • Comparative Example 4 the annealing separator slurry 4 was applied to the surface of the strip 1 without swinging the strip 1 as in the prior art.
  • Table 4 shows the inspection results of the shape defects of the band 1 in each of the above Examples 52 to 57 and Comparative Example 4.
  • the strip 1 (orientated electrical steel sheet) does not have any shape defects or is reduced as compared with the prior art. Further, in Examples 52 to 54, when the oscillation frequency of the strip 1 is close to the turn pitch frequency, that is, the same value as or close to 0.665 Hz, the shape defect of the strip 1 does not occur. I understand. On the other hand, in Comparative Example 4, it can be seen that the shape defect of the belt-like body 1 occurs.
  • Examples 52 to 57 the time change of the swing amount of the belt-like body 1 was controlled in a sine wave shape, but even when this time change of the swing amount is controlled in a rectangular wave shape or a triangular wave shape, There was no difference in the inspection result of the shape defect of the band 1.
  • Example 52 to 57 the result in the case where the turn pitch frequency is 0.665 Hz is shown. However, even if the turn pitch frequency is a value other than 0.665 Hz, the oscillation frequency of the strip 1 is turned. By approaching the pitch frequency, the same result as that obtained when the turn pitch frequency was 0.665 Hz was obtained.
  • the turn pitch frequency was set based on twice the turn pitch as described above, and the oscillation of the strip 1 was controlled based on this turn pitch frequency.
  • the turn pitch frequency was set based on the coating conditions based on such a concept, that is, an even multiple of the turn pitch. The same effect was obtained when the strip 1 was swung in accordance with the turn pitch frequency.
  • the strip 1 when the annealing separator slurry 4 is applied to the surface of the strip 1, the strip 1 is moved along the width direction by the strip transport roll 15 and the squeeze roll 12.
  • the strip transport roll 15 and the squeeze roll 12 To make the unevenness of the film thickness distribution of the annealing separator slurry 4 along the width direction smooth, or to prevent build-up when the strip 1 is wound up to form the coil 10. can do.
  • the yield in the manufacture of the steel sheet can be improved.
  • first and second embodiments of the present invention have been specifically described above, the present invention is not limited to the above-described first and second embodiments, and various modifications based on the technical idea of the present invention. Is possible.
  • the numerical values given in the first and second embodiments are merely examples, and different numerical values may be used as necessary.
  • the pitch T when the slurry supply nozzle 3 is controlled to be sinusoidal or rectangular wave is set to 2 to 120 seconds, or the oscillation frequency of the coating nozzle is adjusted in accordance with the turn pitch of the coil 10.
  • the pitch T in the case where the swing control is performed on the strip 1 in a sine wave shape, a triangular wave shape, or a rectangular wave shape is set to 2 to 120 seconds, or the turn pitch of the coil 10 is set.
  • the oscillation frequency of the strip 1 is set to a predetermined value (for example, 0.665 Hz), but the period and frequency are varied according to the line speed of the strip 1 and the position after winding of the coil 10. It is also possible to make the value variable.
  • the slurry coating apparatus and the slurry coating method according to the present invention are useful for coating a slurry such as an annealing separator on the surface of a steel sheet, and particularly improve the yield of steel sheet production by suppressing the shape failure of the steel sheet. Suitable for doing.

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Abstract

Un dispositif d'application en revêtement de bouillie qui est un mode de réalisation de la présente invention est destiné à appliquer en revêtement une bouillie (4) sur un corps en forme de bande (1) qui se déplace, et comprend un moyen de décharge de bouillie (3) configuré de façon à être apte à fournir la bouillie (4) au corps en forme de bande (1). Ce dispositif d'application en revêtement de bouillie est à peu près parallèle à la surface du corps en forme de bande, et dans une direction à peu près perpendiculaire à la direction de déplacement du corps en forme de bande (1), le dispositif d'application en revêtement de bouillie amène la relation de position relative entre le moyen de décharge de bouillie (3) et le corps en forme de bande (1) à changer et fournit la bouillie (4) au corps en forme de bande (1) à l'aide du moyen de décharge de bouillie (3).
PCT/JP2013/063077 2012-05-09 2013-05-09 Dispositif d'application en revêtement de bouillie et procédé d'application en revêtement de bouillie WO2013168777A1 (fr)

Priority Applications (5)

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RU2014144620A RU2607407C2 (ru) 2012-05-09 2013-05-09 Устройство для нанесения суспензионного покрытия и способ нанесения суспензионного покрытия
KR1020147030978A KR101716944B1 (ko) 2012-05-09 2013-05-09 슬러리 도포 장치 및 슬러리 도포 방법
CN201380023908.8A CN104271258B (zh) 2012-05-09 2013-05-09 料浆涂敷装置及料浆涂敷方法
EP13788396.3A EP2848319B1 (fr) 2012-05-09 2013-05-09 Dispositif d'application en revêtement de bouillie et procédé d'application en revêtement de bouillie
IN2163MUN2014 IN2014MN02163A (fr) 2012-05-09 2013-05-09

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JP2013098836A JP6011446B2 (ja) 2012-05-09 2013-05-08 スラリー塗布装置およびスラリー塗布方法

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CN105797898A (zh) * 2016-06-01 2016-07-27 王保锋 一种铁制品表层喷漆装置
CN106029240A (zh) * 2014-02-18 2016-10-12 3M创新有限公司 制造带不均匀涂层的制品的方法与设备
CN107824370A (zh) * 2017-12-21 2018-03-23 芜湖戎征达伺服驱动技术有限公司 一种板料涂油机
US10704254B2 (en) 2014-02-18 2020-07-07 3M Innovative Properties Company Easy to apply air and water barrier articles

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JP6658617B2 (ja) * 2017-02-28 2020-03-04 Ｊｆｅスチール株式会社 スラリー塗布方法および塗布装置
CN110732455B (zh) * 2019-11-06 2020-12-01 济南西门子变压器有限公司 一种变压器用硅钢片涂漆设备
CN110694826A (zh) * 2019-12-03 2020-01-17 湖州友星木业有限公司 一种板材甲醛吸附剂的喷涂设备
CN112090642B (zh) * 2020-08-19 2022-09-13 普兰设计工程(济南)有限公司 一种中空式木板表面用胶水涂抹装置
RU2767647C1 (ru) 2021-03-05 2022-03-18 МСД Текнолоджис С.а р.л. Добавка к резиновым композициям, способ получения добавки, способ получения резины с повышенными электропроводностью и физико-механическими свойствами и резина

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JPH03188973A (ja) * 1989-12-20 1991-08-16 Kawasaki Steel Corp 塗装鋼帯の線状疵防止方法
JP2000040613A (ja) * 1998-07-23 2000-02-08 Nippon Steel Corp 方向性珪素鋼板の焼鈍分離剤塗布方法及び装置
JP2004057971A (ja) 2002-07-30 2004-02-26 Jfe Steel Kk 帯状体へのスラリーの塗布方法および装置
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106029240A (zh) * 2014-02-18 2016-10-12 3M创新有限公司 制造带不均匀涂层的制品的方法与设备
EP3107660A4 (fr) * 2014-02-18 2018-02-28 3M Innovative Properties Company Procédé et appareil pour la formation d'articles portant des revêtements non uniformes
EP3438363A1 (fr) * 2014-02-18 2019-02-06 3M Innovative Properties Company Procédé pour la formation d'articles portant des revêtements non uniformes
US10704254B2 (en) 2014-02-18 2020-07-07 3M Innovative Properties Company Easy to apply air and water barrier articles
CN105797898A (zh) * 2016-06-01 2016-07-27 王保锋 一种铁制品表层喷漆装置
CN107824370A (zh) * 2017-12-21 2018-03-23 芜湖戎征达伺服驱动技术有限公司 一种板料涂油机

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EP2848319A1 (fr) 2015-03-18
EP2848319B1 (fr) 2018-12-26
RU2607407C2 (ru) 2017-01-10
KR20140143222A (ko) 2014-12-15
EP2848319A4 (fr) 2015-06-03
KR101716944B1 (ko) 2017-03-27
RU2014144620A (ru) 2016-07-10
JP2013253320A (ja) 2013-12-19
IN2014MN02163A (fr) 2015-08-28
JP6011446B2 (ja) 2016-10-19

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