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EP-4741128-A1 - SLITTER

EP4741128A1EP 4741128 A1EP4741128 A1EP 4741128A1EP-4741128-A1

Abstract

The present disclosure provides a slitter. The slitter includes a cutter configured to divide material into a first exit part and a second exit part, an entry roll configured to adjust an angle of entry formed by an entry part of the material approaching the cutter with respect to a reference plane, a first distance measurement sensor configured to detect a vertical moving distance of the entry roll, a first exit roll configured to adjust a first angle of exit formed by the first exit part of the material with respect to the reference plane, a second distance measurement sensor configured to detect a vertical moving distance of the first exit roll, a second exit roll configured to adjust a second angle of exit formed by the second exit part of the material with respect to the reference plane, and a third distance measurement sensor configured to detect a vertical moving distance of the second exit roll.

Inventors

  • KIM, BYEONG JO

Assignees

  • LG Energy Solution, Ltd.

Dates

Publication Date
20260513
Application Date
20250418

Claims (15)

  1. A slitter comprising: a cutter including a first knife and a second knife that are arranged in a vertical direction, the cutter being configured to cut material passing between the first knife and the second knife to divide the material into a first exit part and a second exit part; an entry roll configured to move in the vertical direction and adjust an angle of entry formed by an entry part of the material approaching the cutter with respect to a reference plane; a first distance measurement sensor configured to detect a vertical moving distance of the entry roll, the vertical moving distance being a distance by which the entry roll moves from the reference plane in the vertical direction; a first exit roll configured to move in the vertical direction and adjust a first angle of exit formed by the first exit part of the material with respect to the reference plane; a second distance measurement sensor configured to detect a vertical moving distance of the first exit roll, the vertical moving distance being a distance by which the first exit roll moves from the reference plane in the vertical direction; a second exit roll configured to move in the vertical direction and adjust a second angle of exit formed by the second exit part of the material with respect to the reference plane; and a third distance measurement sensor configured to detect a vertical moving distance of the second exit roll, the vertical moving distance being a distance by which the second exit roll moves from the reference plane in the vertical direction.
  2. The slitter of claim 1, further comprising a monitoring device configured to calculate the angle of entry, based on the vertical moving distance of the entry roll.
  3. The slitter of claim 2, wherein the monitoring device is configured to: calculate a first inter-contact-point distance between a contact point between the entry roll and the entry part of the material and a contact point between the first knife and the entry part of the material, based on the vertical moving distance of the entry roll, a horizontal distance between a center of the entry roll and a center of the first knife in a horizontal direction, a radius of the entry roll, and a radius of the first knife; and calculate the angle of entry, based on the first inter-contact-point distance, the radius of the entry roll, and the radius of the first knife.
  4. The slitter of claim 3, wherein, when the entry roll moves downward from the reference plane, the first inter-contact-point distance is calculated by the following Equation (1): L Id = L Io 2 + h I − R − r I 2 − R + r I 2 wherein in Equation (1), L Id denotes the first inter-contact-point distance, L IO denotes the horizontal distance between the center of the entry roll and the center of the first knife, h I denotes the vertical moving distance of the entry roll, R denotes the radius of the first knife, and r I denotes the radius of the entry roll, and when the entry roll moves downward from the reference plane, the angle of entry is calculated by the following Equation (2): θ Id = − sin − 1 R + r I L Id 2 + R + r I 2 + cos − 1 L Io L Id 2 + R + r I 2 × 180 π degree wherein in Equation (2), θ Id denotes the angle of entry.
  5. The slitter of claim 3, wherein, when the entry roll moves upward from the reference plane, the first inter-contact-point distance is calculated by the following Equation (3): L Iu = L Io 2 + h I + R + r I 2 − R + r I 2 wherein in Equation (3), L Iu denotes the first inter-contact-point distance, L IO denotes the horizontal distance between the center of the entry roll and the center of the first knife, h I denotes the vertical moving distance of the entry roll, R denotes the radius of the first knife, and r I denotes the radius of the entry roll, and when the entry roll moves upward from the reference plane, the angle of entry is calculated by the following Equation (4): θ Iu = sin − 1 h I + R + r I L Iu 2 + R + r I 2 − cos − 1 L Iu L Iu 2 + R + r I 2 × 180 π degree wherein in Equation (4), θ Iu denotes the angle of entry.
  6. The slitter of claim 1, further comprising a monitoring device configured to calculate the first angle of exit, based on the vertical moving distance of the first exit roll.
  7. The slitter of claim 6, wherein the monitoring device is configured to: calculate a second inter-contact-point distance between a contact point between the first exit roll and the first exit part of the material and a contact point between the first knife and the first exit part of the material, based on the vertical moving distance of the first exit roll, a horizontal distance between a center of the first exit roll and a center of the first knife in a horizontal direction, a radius of the first exit roll, and a radius of the first knife; and calculate the first angle of exit, based on the second inter-contact-point distance, the radius of the first exit roll, and the radius of the first knife.
  8. The slitter of claim 7, wherein, when the first exit roll moves downward from the reference plane, the second inter-contact-point distance is calculated by the following Equation (5): L Ud = L Uo 2 + h U − R − r U 2 − R + r U 2 wherein in Equation (5), L Ud denotes the second inter-contact-point distance, Luo denotes the horizontal distance between the center of the first exit roll and the center of the first knife, hu denotes the vertical moving distance of the first exit roll, R denotes the radius of the first knife, and ru denotes the radius of the first exit roll, and when the first exit roll moves downward from the reference plane, the first angle of exit is calculated by the following Equation (6): θ Ud = − sin − 1 R + r U L Ud 2 + R + r U 2 + cos − 1 L Uo L Ud 2 + R + r U 2 × 180 π degree wherein in Equation (6), θ Ud denotes the first angle of exit.
  9. The slitter of claim 7, wherein, when the first exit roll moves upward from the reference plane, the second inter-contact-point distance is calculated by the following Equation (7): L Uu = L Uo 2 + h U + R + r U 2 − R + r U 2 wherein in Equation (7), L Uu denotes the second inter-contact-point distance, Luo denotes the horizontal distance between the center of the first exit roll and the center of the first knife, hu denotes the vertical moving distance of the first exit roll, R denotes the radius of the first knife, and ru denotes the radius of the first exit roll, and when the first exit roll moves upward from the reference plane, the first angle of exit is calculated by the following Equation (8): θ Uu = sin − 1 h U + R + r U L Uu 2 + R + r U 2 − cos − 1 L Uu L Uu 2 + R + r U 2 × 180 π degree wherein in Equation (8), θ Uu denotes the first angle of exit.
  10. The slitter of claim 1, further comprising a monitoring device configured to calculate the second angle of exit, based on the vertical moving distance of the second exit roll.
  11. The slitter of claim 10, wherein the monitoring device is configured to: calculate a third inter-contact-point distance between a contact point between the second exit roll and the second exit part of the material and a contact point between the first knife and the second exit part of the material, based on the vertical moving distance of the second exit roll, a horizontal distance between a center of the second exit roll and a center of the first knife in a horizontal direction, a radius of the second exit roll, and a radius of the first knife; and calculate the second angle of exit, based on the third inter-contact-point distance, the radius of the second exit roll, and the radius of the first knife.
  12. The slitter of claim 11, wherein, when the second exit roll moves downward from the reference plane, the third inter-contact-point distance is calculated by the following Equation (9): L Ld = L Lo 2 + h L − R + r L 2 − R − r L 2 wherein in Equation (9), L Ld denotes the third inter-contact-point distance, L LO denotes the horizontal distance between the center of the second exit roll and the center of the first knife, h L denotes the vertical moving distance of the second exit roll, R denotes the radius of the first knife, and r L denotes the radius of the second exit roll, and when the second exit roll moves downward from the reference plane, the second angle of exit is calculated by the following Equation (10): θ Ld = cos − 1 h L − R + r L L Ld 2 + R − r L 2 − cos − 1 L Ld L Ld 2 + R − r L 2 × 180 π − 90 degree wherein in Equation (10), θ Ld denotes the second angle of exit.
  13. The slitter of claim 11, wherein, when the second exit roll moves upward from the reference plane, the third inter-contact-point distance is calculated by the following Equation (11): L Lu = L Lo 2 + h L + R − r L 2 − R − r L 2 wherein in Equation (11), L Lu denotes the third inter-contact-point distance, L LO denotes the horizontal distance between the center of the second exit roll and the center of the first knife, h L denotes the vertical moving distance of the second exit roll, R denotes the radius of the first knife, and r L denotes the radius of the second exit roll, and when the second exit roll moves upward from the reference plane, the second angle of exit is calculated by the following Equation (12): θ Lu = − sin − 1 L Lo L Lu 2 + R − r L 2 + cos − 1 R − r L L Lu 2 + R − r L 2 × 180 π degree wherein in Equation (12), θ Lu denotes the second angle of exit.
  14. The slitter of claim 1, wherein the entry roll supports an upper surface of the entry part of the material, the first exit roll supports an upper surface of the first exit part of the material, and the second exit roll supports a bottom surface of the second exit part of the material.
  15. The slitter of claim 14, further comprising a monitoring device, wherein the monitoring device is configured to: calculate the angle of entry, based on the vertical moving distance of the entry roll; calculate the first angle of exit, based on the vertical moving distance of the first exit roll; and calculate the second angle of exit, based on the vertical moving distance of the second exit roll.

Description

[Technical Field] The present disclosure relates to a slitter. This application claims the benefit of priority based on Korean Patent Application No. 10-2024-0053917, filed on April 23, 2024, and the entire content of the Korean patent application is incorporated herein by reference. [Background Art] A slitting process is a process of cutting material by a knife in a direction parallel to a moving direction of the material to divide the material into a plurality of segments. In the slitting process, angles of entry and exit of the material are major factors of the slitting process that affect the quality of a cut surface of the material and the occurrence of defects such as burrs. The angles of entry and exit of the material include an angle of entry formed by the material approaching the knife with respect to an arbitrary reference plane and angles of exit formed by the segments of the material away from the knife with respect to the reference plane. In order to improve the reliability of a product manufactured through the slitting process, it is required to accurately monitor the angles of entry and exit of the material. [Disclosure] [Technical Problem] The present disclosure is directed to providing a slitter. [Technical Solution] An aspect of the present disclosure provides a slitter including: a cutter that includes a first knife and a second knife that are arranged in a vertical direction and is configured to cut material passing between the first knife and the second knife to divide the material into a first exit part and a second exit part; an entry roll configured to move in the vertical direction and adjust an angle of entry formed by an entry part of the material approaching the cutter with respect to a reference plane; a first distance measurement sensor configured to detect a vertical moving distance of the entry roll, the vertical moving distance being a distance by which the entry roll moves from the reference plane in the vertical direction; a first exit roll configured to move in the vertical direction and adjust a first angle of exit formed by the first exit part of the material with respect to the reference plane; a second distance measurement sensor configured to detect a vertical moving distance of the first exit roll, the vertical moving distance being a distance by which the first exit roll moves from the reference plane in the vertical direction; a second exit roll configured to move in the vertical direction and adjust a second angle of exit formed by the second exit part of the material with respect to the reference plane; and a third distance measurement sensor configured to detect a vertical moving distance of the second exit roll, the vertical moving distance being a distance by which the second exit roll moves from the reference plane in the vertical direction. In embodiments, the slitter may further include a monitoring device configured to calculate the angle of entry, based on the vertical moving distance of the entry roll. In embodiments, the monitoring device may be configured to calculate a first inter-contact-point distance between a contact point between the entry roll and the entry part of the material and a contact point between the first knife and the entry part of the material, based on the vertical moving distance of the entry roll, a horizontal distance between a center of the entry roll and a center of the first knife in a horizontal direction, a radius of the entry roll, and a radius of the first knife, and to calculate the angle of entry, based on the first inter-contact-point distance, the radius of the entry roll, and the radius of the first knife. In embodiments, when the entry roll moves downward from the reference plane, the first inter-contact-point distance may be calculated by the following Equation (1): LId=LIo2+hI−R−rI2−R+rI2 In Equation (1), LId denotes the first inter-contact-point distance, LIO denotes the horizontal distance between the center of the entry roll and the center of the first knife, hI denotes the vertical moving distance of the entry roll, R denotes the radius of the first knife, and n denotes the radius of the entry roll, and when the entry roll moves downward from the reference plane, the angle of entry may be calculated by the following Equation (2): θId=−sin−1R+rILId2+R+rI2+cos−1LIoLId2+R+rI2×180πdegree In Equation (2), θId denotes the angle of entry. In embodiments, when the entry roll moves upward from the reference plane, the first inter-contact-point distance may be calculated by the following Equation (3): LIu=LIo2+hI+R+rI2−R+rI2 In Equation (3), LIu denotes the first inter-contact-point distance, LIO denotes the horizontal distance between the center of the entry roll and the center of the first knife, hI denotes the vertical moving distance of the entry roll, R denotes the radius of the first knife, and n denotes the radius of the entry roll, and when the entry roll moves upward from the reference plane, the angle of entry