Coating roll equipment, coating apparatus, and method for correcting position of coating roll

Abstract

Coating roll equipment related to an embodiment of the present invention may comprise: a traveling unit including a coating roll disposed to face a discharge port of a coater through which slurry is discharged, the traveling unit being provided to guide the traveling of a substrate; a roundness measurement unit provided to measure the roundness of the coating roll; and a correction unit including a correction roll provided to be in contact with the coating roll, the correction unit being provided to press the coating roll through the correction roll on the basis of a measurement value of the roundness measurement unit.

Description

Coating roll equipment, coating device, and method for correcting the position of the coating roll

[0001] The present invention relates to a coating roll facility, a coating device, and a method for correcting the position of a coating roll, and more specifically, to a coating roll facility for applying a slurry to a moving substrate, a coating device, and a method for correcting the position of a coating roll that can measure the roundness of the coating roll while the substrate is moving.

[0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2024-0123052 dated September 10, 2024, and all contents disclosed in the document of said Korean patent application are incorporated herein as part of this specification.

[0003] Figure 1 is a diagram showing a slurry being coated by a slot die coating method, and Figure 2 is a schematic diagram showing a method for measuring the roundness of a coating roll using a conventional dial gauge.

[0004] Generally, unlike primary batteries which cannot be recharged, secondary batteries refer to batteries that can be charged and discharged, and such secondary batteries are widely used in various fields such as mobile phones, laptops, and automobiles.

[0005] The electrodes of such secondary batteries are manufactured by coating a slurry mixed with active materials and conductive materials onto a metal substrate, heating and drying it, and then undergoing a rolling process.

[0006] Examples of the above coating process include a slot die coating method in which a slurry (2) is discharged onto a substrate (1, e.g., a current collector) using a slot die, and a roll coating method in which the slurry (2) is applied to a gravure roll (not shown) and then transferred to the substrate (1) while the gravure roll (not shown) with the slurry (2) applied rotates.

[0007] As shown in FIG. 1, the slot die (10) discharges a slurry (2) from the discharge port (11) of the slot die (10) onto a substrate (1) that is continuously driven and supported by a coating roll (20), and coats the slurry (2) onto the substrate (1).

[0008] The coating quality of the above-mentioned coating electrode (3) is based on the premise that the amount of slurry (2) loaded in the width direction (TD) and travel direction (MD) of the substrate (1) during slurry (2) coating is uniform.

[0009] The roll axis (20a) of the coating roll (20) must be located coaxial with the rotation axis (25a) of the motor (25). However, when the motor (25) is driven, the roll axis (20a) of the coating roll (20) may shake due to vibrations occurring at the connection part (27) between the rotation axis (25a) of the motor (25) and the roll axis (20a).

[0010] When the motor (25) is driven, shaking of the roll axis (20a) of the coating roll (20) can cause a deviation between the two ends of the roll axis (20a) relative to the rotation axis (25a) of the motor (25). This can cause a loading deviation in the driving direction (MD) of the substrate (1) when the slurry (2) is applied to the substrate (1).

[0011] Among these, there are various causes for the loading deviation in the driving direction (MD), but the change in the roundness of the coating roll (20) is identified as the main cause. A change in the roundness of the coating roll (20) means that the coating gap changes with periodicity.

[0012] Roundness is an indicator of the accuracy of a circular shape, measuring how close a specific shape is to an ideal circle.

[0013] Conventionally, in order to evaluate the roundness of such a coating roll (20), a physical contact method using a dial gauge (30) as shown in FIG. 2 was adopted. That is, the measuring element (31) of the dial gauge (30) was brought into contact with the surface of the coating roll (20), and the minute movement of the spindle was amplified by a gear mechanism to read the dimension indicated on the scale plate and compare the lengths to evaluate the roundness of the coating roll (20).

[0014] Conventionally, roundness could not be measured at actual line operating speeds because it was necessary to stop the equipment line to take measurements. In addition, measurement errors were inevitable depending on the skill level of the operator operating the dial gauge.

[0015] In addition, in the past, when a problem was identified due to roundness, it was necessary to replace the part of the connecting portion (27) connecting the roll axis (20a) of the coating roll (20) and the rotation axis (25a) of the motor (25), or to replace the coating roll (20) itself. Furthermore, there was a problem in that the production volume of the coating electrode (3) decreased because the coating electrode (3) could not be produced during the time for replacing the part and the coating roll (20).

[0016] The present invention aims to provide a coating roll facility capable of measuring the roundness of a coating roll during a coating process, a coating device including the same, and a method for correcting the position of a coating roll.

[0017] The present invention aims to provide a coating roll facility capable of correcting the position of a coating roll during operation based on the result of measuring roundness, a coating device including the same, and a method for correcting the position of a coating roll.

[0018] A coating roll facility related to one embodiment of the present invention includes a driving unit comprising a coating roll provided to guide the driving of a substrate, a roundness measuring unit provided to measure the roundness of the coating roll, and a correction unit provided to press the coating roll through the correction roll based on the measurement value of the roundness measuring unit.

[0019] The above roundness measuring unit is configured to be able to contact a rotating coating roll and may include a measuring unit configured to measure the roundness of the coating roll while moving from one end to the other end of the coating roll in the width direction of the substrate.

[0020] The roundness measuring unit includes a rail arranged parallel to the coating roll in the width direction of the substrate, and the measuring unit is movably mounted on the rail and can measure the roundness of the coating roll while moving in the width direction of the substrate.

[0021] The above measuring unit may include a measuring tip provided to measure the outer diameter of a coating roll that is in contact with and rotating the coating roll.

[0022] The above roundness measuring unit may include a rail driving unit configured to adjust the position of the rail in a direction closer to or further away from the coating roll so that the measuring unit contacts and separates from the coating roll.

[0023] The above coating roll can be positioned to face the discharge port of the coater from which the slurry is discharged.

[0024] The roundness measuring unit is installed to be able to contact the coating roll on the opposite side of the moving substrate, so as to measure the roundness of the coating roll while the slurry is being applied to the substrate.

[0025] The above correction roll may be installed to be in contact with the coating roll at a different location from the roundness measuring unit, and may be configured to press the coating roll with tension adjusted based on the measurement value of the roundness measuring unit.

[0026] The above correction unit may include a tension adjustment unit provided to rotatably support the roll axis of the correction roll and adjust the tension of the roll axis of the correction roll.

[0027] The tension adjustment unit can adjust the tension of the correction roll by adjusting the position of one end of the roll axis of the correction roll in a direction closer to or further away from the coating roll based on the measurement value of the roundness measuring unit.

[0028] The above correction unit may include a correction motor mounted on the roll axis of the correction roll on the opposite side of the tension adjustment unit to provide driving force to the correction roll.

[0029] The above correction unit may include a roll support rotatably supporting the correction roll and arranged parallel to the coating roll in the width direction of the substrate, and a correction position adjustment unit mounted on the roll support and configured to move the roll support closer to or further away from the coating roll so that the correction roll comes into contact with and separates from the coating roll.

[0030] A controller may be included to control the operation of the roundness measuring unit so that, during the operation of the driving unit and the coater, the roundness measuring unit moves from a position spaced apart from the coating roll to a position in contact with the coating roll at a preset period, and while in contact with the coating roll, moves in the width direction of the substrate to measure the roundness of the coating roll.

[0031] The controller can control the operation of the correction unit to press the coating roll through the correction roll based on the measurement value of the roundness measuring unit so that the roll axis of the coating roll is positioned coaxially with the rotation axis of the first motor mounted on the coating roll.

[0032] A coating device related to one embodiment of the present invention is for producing a coating electrode by applying a slurry to a moving substrate, and may include a coater having a discharge port through which the slurry is discharged, a driving unit including a coating roll arranged to face the discharge port of the coater and provided to guide the movement of the substrate, a roundness measuring unit provided to measure the roundness of the coating roll, and a correction unit provided to contact the coating roll, and may include a correction unit provided to press the coating roll through the correction roll based on the measurement value of the roundness measuring unit.

[0033] A method for correcting the position of a coating roll according to one embodiment of the present invention may include: a step of applying a slurry discharged from a discharge port of a coater toward a coating roll to a substrate traveling along the coating roll; a step of measuring the roundness of the coating roll by measuring the outer diameter of the coating roll while the roundness measuring unit moves in the width direction of the substrate while the slurry is being applied to the substrate; and a correction step of correcting the position of the coating roll by applying pressure to the coating roll while the correction roll is rotating based on the measurement value of the roundness measuring unit.

[0034] In the above correction step, the correction roll is tension-adjusted based on the measurement value of the roundness measuring unit, and the coating roll can be pressed with the adjusted tension.

[0035] In the above correction step, the coating roll can be position-corrected through the correction roll so that the roll axis of the coating roll and the rotation axis of the motor mounted on the coating roll become coaxial.

[0036] In the above correction step, the roundness measuring unit can measure the roundness of the coating roll while reciprocating between both ends of the coating roll in the width direction of the substrate.

[0037] After the completion of the above correction step, the roundness measuring unit can measure the roundness of the coating roll while moving in the width direction of the substrate.

[0038] As described above, the coating roll equipment, the coating device including the same, and the method for correcting the position of the coating roll related to at least one embodiment of the present invention have the following effects.

[0039] The present invention can measure the roundness of a coating roll by moving along the surface of the coating roll in the width direction of the coating roll at a position where the roundness measuring instrument is not in contact with the substrate during the coating process.

[0040] The roundness of the coating roll can be measured during the coating process, and there is no need to stop the coating roll equipment for roundness measurement, thereby improving the productivity of the coating electrode.

[0041] The present invention can correct the position of the coating roll during operation based on the results of roundness measurement, and thereby improve the operational efficiency of the coating roll equipment.

[0042] The correction roll can correct the position of the coating roll so that the roll axis of the coating roll is positioned coaxially with the rotation axis of the motor during the operation of the coating roll.

[0043] The present invention can prevent loading deviation of the slurry caused by deviation between the two ends of the roll axis of the coating roll.

[0044] Figure 1 is a diagram showing a slurry being coated by a slot die coating method.

[0045] Figure 2 is a schematic diagram showing a method for measuring the roundness of a coating roll using a conventional dial gauge.

[0046] FIG. 3 schematically illustrates the configuration of a coating roll facility according to one embodiment of the present invention.

[0047] FIG. 4 schematically illustrates the state diagram of the roundness measurement unit of a coating roll in a coating roll facility according to one embodiment of the present invention.

[0048] FIG. 5 schematically illustrates the operating state of a correction unit that corrects the position of a coating roll in a coating roll facility according to one embodiment of the present invention.

[0049] FIG. 6 is a diagram showing the combined state of a correction roll and a tension adjustment unit according to one embodiment of the present invention.

[0050] FIG. 7 schematically illustrates a flowchart of a method for correcting the position of a coating roll according to one embodiment of the present invention.

[0051] Hereinafter, with reference to the attached drawings, a coating roll facility related to one embodiment of the present invention, a coating device including the same, and a method for correcting the position of a coating roll will be described.

[0052] A coating roll facility related to one embodiment of the present invention is a coating roll facility for producing a coating electrode by applying a slurry to a moving substrate.

[0053] FIG. 3 schematically illustrates a configuration diagram of a coating roll facility according to one embodiment of the present invention, and FIG. 4 schematically illustrates a state diagram of the roundness measuring unit of the coating roll in the coating roll facility according to one embodiment of the present invention.

[0054] Referring to FIGS. 3 and 4, the coating roll equipment may include a driving unit (120) comprising a coating roll (121) arranged to face the discharge port (111) of a coater (110) from which a slurry (2) is discharged and configured to guide the movement of a substrate (1), a roundness measuring unit (130) configured to measure the roundness of the coating roll (121), and a correction roll (151) configured to be in contact with the coating roll (121), and a correction unit (150) configured to press the coating roll (121) through the correction roll (151) based on the measurement value of the roundness measuring unit (130).

[0055] The above coating roll equipment is part of the equipment of the coating device (100). The coating device (100) may include the coater (110), the driving unit (120), the roundness measuring unit (130), and the correction unit (150).

[0056] The above coater (110) is configured to discharge the slurry (2) through the discharge port (111). The discharge port (111) may have a slit shape extending in the width direction (TD) of the substrate (1).

[0057] The above coater (110) may have the discharge port (111) positioned parallel to the width direction (TD) of the substrate (1). The above coater (110) may be configured to apply the slurry (2) to the surface of the substrate (1) while it is traveling along the driving direction (MD).

[0058] The above driving unit (120) includes the coating roll (121) and a plurality of rolls (123).

[0059] The plurality of rolls (123) are spaced apart along the driving path of the above-mentioned material (1) and are arranged to guide the driving of the above-mentioned material (1).

[0060] The coating roll (121) is installed facing the discharge port (111) of the coater (110) and can guide the movement of the substrate (1) passing through the coater (110). The coating roll (121) may be arranged parallel to the discharge port (111) of the coater (110). The coating roll (121) may be installed spaced apart from the discharge port (111) of the coater (110) by the same distance (d1).

[0061] FIG. 5 schematically illustrates the operating state of a correction unit that corrects the position of a coating roll in a coating roll facility according to one embodiment of the present invention, and FIG. 6 is a combined state diagram of a correction roll and a tension adjustment unit according to one embodiment of the present invention.

[0062] The coating roll (121) may be installed at a predetermined distance from the coater (110). For example, the coating roll (121) may be formed as a cantilever type, and a first motor (125) for rotating the coating roll (121) may be provided only on one side of the coating roll (121). Additionally, the coating roll (121) may be mounted on the first motor (125) and may guide the movement of the substrate (1) in the rotational direction of the first motor (125).

[0063] When the first motor (125) is driven, the roll axis (122) of the coating roll (121) may be shaken by vibrations occurring at the connection part (129) between the rotation axis of the first motor (125) and the roll axis (122) of the coating roll (121). The coating roll (121) is provided in a cantilever type so that one end (121a) of the coating roll (121) may be shaken by vibrations at the connection part (129), and the other end (121b) of the coating roll (121) may have a larger radius of rotation relative to the rotation axis (126) of the first motor (125) due to the discharge pressure of the slurry (2).

[0064] For convenience of explanation, in this drawing, the imaginary line connecting the center of the roll axis (122) of the coating roll (121) is indicated by drawing number 122, and the imaginary line connecting the center of the rotation axis (126) of the first motor (125) is indicated by drawing number 126.

[0065] When a deviation occurs between the two ends of the coating roll (121) with respect to the rotation axis (126) of the first motor (125), the gap (d1) between the discharge port (111) of the coater (110) and the coating roll (121) can be varied along the width direction (TD) of the substrate (1). If the gap (d1) between the coating roll (121) and the discharge port (111) of the coater (110) is varied along the width direction (TD) of the substrate (1), it may cause a loading deviation in the driving direction (MD) of the substrate (1) when the slurry (2) is applied to the substrate (1).

[0066] The loading deviation of the above slurry (2) causes a change in the thickness of the coating layer in the width direction (TD) of the above substrate (1). The coating electrode (3) may be considered to have a coating defect if the thickness of the coating layer is not uniform in the width direction (TD) of the above substrate (1) and in the driving direction (MD) of the above substrate (1). The coating layer is formed by drying the slurry (2) applied to the above substrate (1).

[0067] That is, in order to improve the coating quality of the above-mentioned coating electrode (3), the amount of slurry (2) loaded in the width direction (TD) and travel direction (MD) of the substrate (1) during slurry (2) coating must be uniform.

[0068] In order for the above slurry (2) to be uniformly applied to the above substrate (1), it is important that the gap (d1) between the coating roll (121) and the discharge port (111) of the coater (110) is maintained equally in the width direction (TD) of the above substrate (1).

[0069] In the coating process for producing the above-mentioned coating electrode (3), the distance between the coating roll (121) and the discharge port (111) of the coater (110) must be maintained constant in the width direction (TD) of the substrate (1).

[0070] The above-mentioned coating electrode (3) may be a positive or negative electrode used in a secondary battery and includes a substrate (1) and a coating layer on which a slurry (2) is coated on the substrate (1).

[0071] The present invention can measure the roundness of the coating roll (121) in real time, at a preset period, or as needed during the coating process using a roundness measuring unit (130), and correct the position of the coating roll (121) based on the measurement value of the roundness measuring unit (130).

[0072] Referring to FIG. 3, the roundness measuring unit (130) and the correction unit (150) may be spaced apart from the coating roll (121) on opposite sides of the substrate (1). For example, with the coater (110) positioned to face one side of the substrate (1), the roundness measuring unit (130) and the correction unit (150) may be positioned to face the other side of the substrate (1). The roundness measuring unit (130) and the correction unit (150) may be arranged to be in contact with and separated from the coating roll (121) at different locations.

[0073] Hereinafter, the configuration and function of the roundness measuring unit (130) will be described with reference to FIGS. 3 and FIGS. 4.

[0074] The roundness measuring unit (130) may be positioned parallel to the coating roll (121) at a location that does not affect the movement of the substrate (1). The roundness measuring unit (130) may be provided to come into contact with the rotating coating roll (121) to measure the roundness of the coating roll (121).

[0075] The roundness of the coating roll (121) is an indicator of the accuracy of the shape of the coating roll (121), and is a measure of how close the shape of the coating roll (121) is to an ideal circle. The roundness of the coating roll (121) can be calculated by measuring the outer diameter of the coating roll (121) while it is rotating at various positions of the coating roll (121) and from the difference between the maximum and minimum values ​​among the measured values. The smaller the roundness, the closer the shape of the coating roll (121) being measured is to an ideal circle.

[0076] The roundness measuring unit (130) is installed to be in contact with the coating roll (121) on the opposite side of the moving substrate (1), so as to measure the roundness of the coating roll (121) while the slurry (2) is being applied to the substrate (1).

[0077] The above roundness measuring unit (130) may include a rail (131), a measuring unit (133), and a rail driving unit (132).

[0078] The above rail (131) can be arranged parallel to the coating roll (121) in the width direction (TD) of the above substrate (1).

[0079] The rail drive unit (132) is mounted on the rail (131). The rail drive unit (132) can adjust the position of the rail (131) in a direction closer to or further away from the coating roll (121).

[0080] The rail drive unit (132) can move the rail (131) so that the measuring unit (133) comes into contact with and separates from the coating roll (121). The rail drive unit (132) may use a reciprocating cylinder or a linear motor.

[0081] The measuring unit (133) may be movably mounted on the rail (131). The measuring unit (133) may measure the roundness of the coating roll (121) at different points while moving along the rail (131) in the width direction (TD) of the substrate (1). The measuring unit (133) may be configured to measure the roundness of the coating roll (121) while moving from one end (121a) of the coating roll (121) to the other end in the width direction (TD) of the substrate (1).

[0082] The above measuring unit (133) may include a moving block (134) and a measuring tip (135). The moving block (134) may be configured to move left and right along the rail (131) in the width direction (TD) of the substrate (1).

[0083] The measuring tip (135) may be provided to protrude to one side of the moving block (134). The measuring tip (135) may be provided to measure the outer diameter of the coating roll (121) while it is in contact with the coating roll (121) and rotating.

[0084] Below, the correction unit will be described with reference to FIGS. 5 and FIGS. 6.

[0085] Referring to FIGS. 5 and 6, the correction unit (150) can adjust the tension of the correction roll (151) based on the measurement value of the roundness measuring unit (130) and correct the position of the coating roll (121) by pressing the coating roll (121) through the correction roll (151). Correcting the position of the coating roll (121) may mean adjusting the gap by pressing at least a portion of the coating roll (121) so that the deviation between one end of the coating roll (121) and the substrate, and the gap between the other end of the coating roll (121) and the substrate, becomes smaller. Additionally, correcting the position of the coating roll (121) may mean adjusting the gap by pressing at least a portion of the coating roll (121) so that the gap between one end of the coating roll (121) and the substrate, and the gap between the other end of the coating roll (121) and the substrate, become equal.

[0086] The above correction unit (150) may include a correction roll (151), a correction motor (153), a tension adjustment unit (154), a roll support (158), and a correction position adjustment unit (159).

[0087] The correction roll (151) may be installed parallel to the coating roll (121) at a position that does not affect the movement of the substrate (1). The correction roll (151) may be installed to be in contact with the coating roll (121) at a different position from the roundness measuring unit (130). The correction roll (151) may be provided to press the coating roll (121) with a tension adjusted based on the measurement value of the roundness measuring unit (130).

[0088] The above correction roll (151) may be equipped with a correction motor (153) and a tension adjustment unit (154).

[0089] The above correction motor (153) may be mounted on the roll support (158). The above correction motor (153) is mounted on one end (152a) of the correction roll (151) to provide driving force to the correction roll (151).

[0090] The above correction motor (153) can rotate the correction roll (151) at the rotational speed of the coating roll (121). When correcting the position of the coating roll (121), the correction motor (153) can rotate the correction roll (151) within the allowable error range of the rotational speed of the first motor (125).

[0091] The tension adjustment unit (154) may be mounted on the roll support (158) on the opposite side of the correction motor (153). The tension adjustment unit (154) is intended to adjust the tension of the other end (152b) of the roll axis of the correction roll (151).

[0092] The tension adjustment unit (154) may include a support block (155) and a tension driving unit (157).

[0093] The support block (155) rotatably supports the other end (152b) of the roll axis of the correction roll. The support block (155) is installed on the roll support (158).

[0094] The tension drive unit (157) is mounted on the support block (155) and is configured to push the other end (152b) of the roll axis of the correction roll in a direction closer to the coating roll (121) or pull it away from the coating roll (121) along a direction perpendicular to the width direction (TD) of the substrate.

[0095] The tension drive unit (157) can adjust the tension of the correction roll by adjusting the position of the other end (152a) of the roll axis (152) of the correction roll (150) in a direction perpendicular to the width direction (TD) of the material.

[0096] The tension driving unit (157) can adjust the tension of the correction roll (151) by adjusting the position of the support block (155) based on the measurement value of the roundness measuring unit (130).

[0097] The drive shaft (156) of the tension drive unit (157) can tension the roll axis of the correction roll (151) while moving the support block (155) in a direction closer to the coating roll (121). As the distance the support block (155) moves in a direction closer to the coating roll (121) increases, strong tension can be applied to the correction roll (151).

[0098] The roll support (158) rotatably supports the correction roll (151) and can be positioned parallel to the coating roll (121) in the width direction (TD) of the substrate (1). The correction position adjustment unit (159) is mounted on the roll support (158). The correction position adjustment unit (159) may use a reciprocating cylinder or a linear motor.

[0099] The above correction position adjustment unit (159) can move the roll support (158) in a direction closer to the coating roll (121) so that the correction roll (151) is in contact with the coating roll (121) from a position separated from the coating roll (121).

[0100] Additionally, the correction position adjustment unit (159) can move the roll support (158) away from the coating roll (121) from the position where the correction roll (151) is in contact with the coating roll (121) to a position where it is spaced apart from the coating roll (121).

[0101] The controller (170) is intended to control the operation of the roundness measuring unit (130) and the correction unit (150). The controller (170) can operate the roundness measuring unit (130) in real time or at a preset interval during the operation of the driving unit (120) and the coater (110), and can control the operation of the correction unit (150) based on the measurement value of the roundness measuring unit (130) so that the coating roll (121) is positioned in the correct position.

[0102] Below, a method for correcting the position of a coating roll will be described with reference to FIG. 7.

[0103] FIG. 7 schematically illustrates a flowchart of a method for correcting the position of a coating roll according to one embodiment of the present invention.

[0104] The above method for correcting the position of the coating roll may include a slurry application step (S1) in which a slurry (2) discharged from the discharge port (111) of the coater (110) toward the coating roll (121) is applied to a substrate (1) traveling along the coating roll (121), and a step (S2) in which, while the slurry (2) is being applied to the substrate (1), a roundness measuring unit (130) is in contact with the rotating coating roll (121) and continuously measures the outer diameter of the coating roll (121) while moving in the width direction (W) of the substrate to measure the roundness of the coating roll (121).

[0105] Additionally, the method for correcting the position of the coating roll may include a correction step (S3) in which a correction roll (151) in contact with the coating roll (121) at a different position from the roundness measuring unit (130) is tension-adjusted based on the measurement value of the roundness measuring unit (130), and the coating roll (121) is pressed with the adjusted tension while rotating together with the coating roll (121).

[0106] In the above slurry application step (S1), the roundness measuring unit (130) and the correction unit (150) may be in standby at a position spaced apart from the coating roll (121) when the coater (110) is operated.

[0107] The above slurry application step (S1) is a process of applying the slurry (2) to the substrate (1). In the above slurry application step (S1), the coating roll (121) may be rotated to push the substrate (1) in the travel direction (MD) of the substrate (1). The coater (110) may be operated to discharge the slurry (2) through the discharge port (111).

[0108] The roundness measurement step (S2) can be performed during the above slurry application step (S1).

[0109] The controller (170) can measure the roundness of the coating roll (121) by operating the roundness measuring unit (130) at a preset period during the operation of the driving unit (120) and the coater (110).

[0110] The above controller (170) can operate the rail drive unit (132) and the measurement unit (133) in sequence.

[0111] In the above roundness measurement step (S2), the rail drive unit (132) can move the rail (131) to a position where the measuring unit (133) is in contact with the coating roll (121) from a position spaced apart from the coating roll (121). The rail drive unit (132) can stop at the position where the measuring unit (133) is in contact with the coating roll (121).

[0112] In the above roundness measurement step (S2), the measuring unit (133) can measure the roundness of the coating roll (121) while moving in the width direction (TD) of the substrate (1) while in contact with the coating roll (121). The measuring unit (133) can measure the roundness of the coating roll (121) by moving back and forth along the width direction (TD) of the substrate (1) from one end (121a) to the other end of the coating roll (121), and from the other end (121b) to the one end of the coating roll (121).

[0113] If the roundness of the coating roll (121) measured by the above process is good, the correction roll (151) can wait at a position spaced apart from the coating roll (121) (S4). The roundness value of the coating roll (121) may be stored in advance in the controller (170), and the condition of the roundness may be determined by comparing the value stored in advance with the measured value.

[0114] If the roundness of the measured coating roll (121) corresponds to a value (NG) that affects the quality of the coating electrode (3), the controller (170) can operate the correction unit (150) based on the measurement value of the roundness measuring unit (130).

[0115] In the above correction step (S3), the controller (170) can sequentially operate the correction position adjustment unit (159) of the correction unit (150), the tension adjustment unit (154), and the correction motor (153).

[0116] In the above correction step (S3), the correction position adjustment unit (159) can move the roll support (158) from a position where the correction roll (151) is spaced apart from the coating roll (121) to a position where it contacts the coating roll (121). The correction position adjustment unit (159) can stop at the position where the correction roll (151) contacts the coating roll (121).

[0117] The correction step (S3) can be performed during the slurry application step (S1). The correction step (S3) can be performed together with the roundness measurement step (S2).

[0118] In the above correction step (S3), the tension adjustment unit (154) can adjust the tension of the correction roll (151) based on the measurement value of the roundness measuring unit (130).

[0119] In the above correction step (S3), the roundness measuring unit (130) can measure the roundness of the coating roll (121) by moving back and forth between both ends of the coating roll (121) in the width direction (TD) of the substrate (1). The tension adjustment unit (154) can be operated to tense or relieve tension of the correction roll (151) according to the measurement value of the roundness measuring unit (130).

[0120] The above correction roll (151) can press the coating roll (121) while rotating freely with tension adjusted by the tension adjustment unit (154). Additionally, the above correction roll (151) can press the coating roll (121) while rotating at the same speed as the coating roll (121) by the above correction motor (153).

[0121] In the manner described above, the correction roll (151) can correct the position of the coating roll (121) so that the roll axis (122) of the coating roll (121) and the rotation axis (126) of the first motor (125) are positioned coaxially.

[0122] In the above correction step (S3), the correction roll (151) can move in a direction away from the coating roll (121) and wait at a position spaced apart from the coating roll (121) based on the measurement value of the roundness measuring unit (130) when the roll axis (122) of the coating roll (121) is located coaxial with the rotation axis (126) of the first motor (125) (S4).

[0123] After the completion of the above correction step (S3), the roundness measuring unit (130) can measure the roundness of the coating roll (121) while moving in the width direction (TD) of the substrate (1).

[0124] If the roundness of the coating roll (121) measured after the above correction step (S3) corresponds to a value that affects the quality of the coating electrode (3), the operator may stop the coating roll equipment and then take follow-up measures such as replacing the part of the connection portion (129) between the coating roll (121) and the first motor (125) or replacing the coating roll (121) itself.

[0125] The present invention can correct the position of the coating roll (121) during operation based on the roundness measurement result, thereby improving the operational efficiency of the coating roll equipment.

[0126] In addition, the present invention can prevent loading deviation of the slurry (2) caused by deviation of the roll axis (122) of the coating roll (121) relative to the rotation axis of the first motor (125) by correcting the position of the coating roll (121) during the coating process.

[0127] In addition, the roundness of the coating roll (121) can be measured during the coating process, so there is no need to stop the coating roll equipment to measure the roundness, thereby improving the productivity of the coating electrode (3).

[0128] In addition, the operator can quickly identify whether there is a defect in the coating roll (121) through the roundness measurement value measured during the coating process and can quickly perform follow-up measures. This can ultimately ensure uniformity in the quality of the coating electrode (3).

[0129] The preferred embodiments of the present invention described above are disclosed for illustrative purposes only, and those skilled in the art with ordinary knowledge of the present invention will be able to make various modifications, changes, and additions within the spirit and scope of the present invention, and such modifications, changes, and additions should be considered to fall within the scope of the following claims.

[0130] According to a coating roll facility, a coating apparatus including the same, and a method for correcting the position of a coating roll related to at least one embodiment of the present invention, the roundness of the coating roll can be measured during a coating process, and the position of the coating roll can be corrected based on the result of the roundness measurement, thereby improving the operational efficiency of the coating roll facility.

Claims

1. A driving unit including a coating roll provided to guide the driving of the material; A roundness measuring unit provided to measure the roundness of the above-mentioned coating roll; and A coating roll facility comprising a correction roll provided to be in contact with the coating roll, and a correction unit provided to apply pressure to the coating roll through the correction roll based on the measurement value of the roundness measuring unit.

2. In Paragraph 1, The above-mentioned roundness measuring unit is configured to be in contact with a rotating coating roll, and A coating roll facility comprising a measuring unit configured to measure the roundness of the coating roll while moving from one end to the other end of the coating roll in the width direction of the above-described material.

3. In Paragraph 2, The above roundness measuring unit further includes a rail arranged parallel to the coating roll in the width direction of the above material, and A coating roll facility characterized by the above-mentioned measuring unit being movably mounted on the rail and measuring the roundness of the coating roll while moving in the width direction of the substrate.

4. In Paragraph 3, The above measuring unit is a coating roll facility comprising a measuring tip provided to measure the outer diameter of a coating roll that is in contact with and rotating the coating roll.

5. In Paragraph 3, The above-mentioned roundness measuring unit is a coating roll facility comprising a rail driving unit configured to adjust the position of the rail in a direction closer to or further away from the coating roll so that the measuring unit contacts and separates from the coating roll.

6. In Paragraph 1, The above coating roll is positioned to face the discharge port of the coater from which the slurry is discharged, and A coating roll facility characterized by the above-described roundness measuring unit being installed to be able to contact the coating roll on the opposite side of the moving substrate, and measuring the roundness of the coating roll while the slurry is being applied to the substrate.

7. In Paragraph 1, The above correction roll is installed to be able to contact the coating roll at a location different from the roundness measuring unit, and is arranged to press the coating roll with tension adjusted based on the measurement value of the roundness measuring unit. The above-described correction unit further comprises a tension adjustment unit configured to rotatably support the roll axis of the correction roll and adjust the tension of the roll axis of the correction roll.

8. In Paragraph 7, A coating roll facility characterized by the above tension adjustment unit adjusting the tension of the correction roll by adjusting the position of one end of the roll axis of the correction roll in a direction closer to or further away from the coating roll based on the measurement value of the above roundness measuring unit.

9. In Paragraph 7, The above correction unit is a coating roll facility that further includes a correction motor mounted on the roll axis of the correction roll on the opposite side of the tension adjustment unit to provide driving force to the correction roll.

10. In claim 7, the correction part A roll support rotatably supporting the correction roll and positioned parallel to the coating roll in the width direction of the substrate; and A coating roll facility comprising a correction position adjustment unit mounted on the above-mentioned roll support and configured to move the roll support in a direction closer to or further away from the coating roll so that the correction roll contacts and separates from the coating roll.

11. In Paragraph 1, A coating roll facility further comprising a controller that controls the operation of the roundness measuring unit so that, during the operation of the driving unit and the coater, the roundness measuring unit moves from a position spaced apart from the coating roll to a position in contact with the coating roll at a preset period, and moves in the width direction of the substrate while in contact with the coating roll to measure the roundness of the coating roll.

12. In Paragraph 11, A coating roll facility characterized by the above controller controlling the operation of the correction unit to press the coating roll through the correction roll so that the roll axis of the coating roll is positioned coaxially with the rotation axis of the first motor mounted on the coating roll, based on the measurement value of the roundness measuring unit.

13. A coating apparatus for producing a coated electrode by applying a slurry to a moving substrate, A coater having a discharge port through which the above-mentioned slurry is discharged; A driving unit comprising a coating roll positioned to face the discharge port of the above-mentioned coater and arranged to guide the movement of the above-mentioned material; A roundness measuring unit provided to measure the roundness of the above-mentioned coating roll; and A coating device comprising a correction roll provided to be in contact with the coating roll, and a correction unit provided to apply pressure to the coating roll through the correction roll based on the measurement value of the roundness measuring unit.

14. A step in which a slurry discharged from the discharge port of a coater toward a coating roll is applied to a substrate traveling along the coating roll; A step of measuring the roundness of a coating roll by measuring the outer diameter of the coating roll while the roundness measuring unit moves in the width direction of the substrate while the slurry is being applied to the substrate; and A method for correcting the position of a coating roll, comprising a correction step of correcting the position of the coating roll by applying pressure to the rotating coating roll based on the measurement value of the roundness measuring unit.

15. In Paragraph 14, A method for correcting the position of a coating roll, characterized in that, in the above correction step, the position of the coating roll is corrected through the correction roll so that the roll axis of the coating roll and the rotation axis of the motor mounted on the coating roll become coaxial.

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