Slitta

Abstract

The technical concept of the present invention provides a slitter. The slitter includes a cutter configured to separate a roll of raw material into a first ejection section and a second ejection section; an ejection roll configured to adjust the angle of incidence of the ejection section of the raw material entering the cutter with respect to a reference plane; a first distance measuring sensor configured to detect the vertical travel distance of the ejection roll; a first ejection roll configured to adjust the first ejection angle of the first ejection section of the raw material with respect to a reference plane; a second distance measuring sensor configured to detect the vertical travel distance of the first ejection roll; a second ejection roll configured to adjust the second ejection angle of the second ejection section of the raw material with respect to a reference plane; and a third distance measuring sensor configured to detect the vertical travel distance of the second ejection roll.

Description

[Technical Field]

[0001] This invention relates to a slitter.

[0002] This application claims priority under Korean Patent Application No. 10-2024-0053917 dated April 23, 2024, and all content disclosed in the said Korean Patent Application is incorporated herein as part of this specification. [Background technology]

[0003] The slitting process involves cutting a roll of fabric with a knife parallel to its direction of travel, separating it into multiple segments. In such a slitting process, the entry and exit angles of the fabric are major factors affecting the quality of the cut surface and the occurrence of defects such as burrs. The entry and exit angles of the fabric include the angle of incidence that the fabric makes with an arbitrary reference plane as it enters the knife, and the angle of exit that the segments of the fabric make with the same reference plane as they exit the knife. To improve the reliability of products manufactured through the slitting process, it is necessary to precisely monitor the entry and exit angles of the fabric. [Overview of the project] [Problems that the invention aims to solve]

[0004] The technical problem that this invention aims to solve is to provide a slitter. [Means for solving the problem]

[0005] To solve the above-mentioned problems, the technical concept of the present invention includes a cutter comprising a first knife and a second knife arranged vertically, configured to cut a raw material passing between the first knife and the second knife and separate the raw material into a first ejection section and a second ejection section; an incident roll that moves vertically and is configured to adjust the incident angle that the incident portion of the raw material entering the cutter makes with a reference plane; a first distance measuring sensor configured to detect the vertical movement distance of the incident roll, which is the distance the incident roll has moved vertically from the reference plane; and a cutting mechanism that moves vertically, The present invention provides a slitter comprising: a first ejection roll configured to adjust a first ejection angle formed by a first ejection section of the raw material with a reference plane; a second distance measuring sensor configured to detect the vertical movement distance of the first ejection roll, which is the distance the first ejection roll has moved vertically from the reference plane; a second ejection roll configured to move vertically and adjust a second ejection angle formed by a second ejection section of the raw material with a reference plane; and a third distance measuring sensor configured to detect the vertical movement distance of the second ejection roll, which is the distance the second ejection roll has moved vertically from the reference plane.

[0006] An exemplary embodiment further includes a monitoring device configured to calculate the angle of incidence based on the vertical travel distance of the incident roll.

[0007] In an exemplary embodiment, the monitoring device is configured to calculate the first contact point distance between the contact point between the incident roll and the incident portion of the raw material, and between the contact point between the first knife and the incident portion of the raw material, based on the vertical travel distance of the incident roll, the horizontal distance along the horizontal direction between the center of the incident roll and the center of the first knife, the radius of the incident roll, and the radius of the first knife, and to calculate the incident angle based on the first contact point distance, the radius of the incident roll, and the radius of the first knife.

[0008] In an exemplary embodiment, when the incident roll descends from the reference plane, the distance between the first contacts is calculated by the following formula (1):

number

Number

[0009] In an exemplary embodiment, when the input roll ascends from the reference plane, the distance between the first contact points is calculated by the following formula (3),

Number

Number

[0010] In an exemplary embodiment, it further includes a monitoring device configured to calculate the first exit angle based on the vertical movement distance of the first exit roll, which is characterized by this.

[0011] In an exemplary embodiment, the monitoring device is configured to calculate the second contact point distance between the first injection roll and the first injection section of the raw material, and between the first knife and the first injection section of the raw material, based on the vertical travel distance of the first injection roll, the horizontal distance along the horizontal direction between the center of the first injection roll and the center of the first knife, the radius of the first injection roll, and the radius of the first knife, and to calculate the first injection angle based on the second contact point distance, the radius of the first injection roll, and the radius of the first knife.

[0012] In an exemplary embodiment, when the first injection roll descends from the reference plane, the distance between the second contacts is calculated by the following formula (5):

number

number

[0013] In an exemplary embodiment, when the first injection roll rises from the reference plane, the distance between the second contacts is calculated by the following equation (7):

number

number

[0014] An exemplary embodiment further includes a monitoring device configured to calculate a second ejection angle based on the vertical travel distance of the second ejection roll.

[0015] In an exemplary embodiment, the monitoring device is configured to calculate the third contact point distance between the second injection roll and the second injection section of the raw material, and between the first knife and the second injection section of the raw material, based on the vertical travel distance of the second injection roll, the horizontal distance along the horizontal direction between the center of the second injection roll and the center of the first knife, the radius of the second injection roll, and the radius of the first knife, and to calculate the second injection angle based on the third contact point distance, the radius of the second injection roll, and the radius of the first knife.

[0016] In an exemplary embodiment, when the second injection roll descends from the reference plane, the distance between the third contacts is calculated by the following formula (9):

number

number

[0017] In an exemplary embodiment, when the second injection roll rises from the reference plane, the distance between the third contacts is calculated by the following formula (11):

number

number

[0018] In an exemplary embodiment, the entrance roll supports the upper surface of the entrance portion of the raw material, the first exit roll supports the upper surface of the first exit portion of the raw material, and the second exit roll supports the bottom surface of the second exit portion of the raw material.

[0019] In an exemplary embodiment, the system further includes a monitoring device configured to calculate the incident angle based on the vertical travel distance of the incident roll, the first exit angle based on the vertical travel distance of the first exit roll, and the second exit angle based on the vertical travel distance of the second exit roll. [Effects of the Invention]

[0020] According to an exemplary embodiment of the present invention, the entry and exit angles of the raw material can be monitored in real time using the vertical travel distance of guide rolls (i.e., an entrance roll, a first exit roll, and a second exit roll) configured to adjust the entry and exit angles of the raw material.

[0021] Furthermore, according to exemplary embodiments of the present invention, when theoretically deriving the entry and exit angles of the raw material using trigonometric functions, the entry and exit angles of the raw material are derived by considering the contact points between the raw material and the guide rolls (i.e., the entrance roll, the first exit roll, and the second exit roll), and the contact points between the raw material and the knife. As a result, there are no theoretical errors, and the entry and exit angles of the raw material can be accurately derived. Therefore, the entry and exit angles of the raw material, which are the main factors in the slitting process, can be precisely monitored, and the reliability of products manufactured by the slitting process can be improved.

[0022] The effects obtained from exemplary embodiments of the present invention are not limited to those described above, and other effects not mentioned can be clearly derived and understood by a person ordinary in the art to which the exemplary embodiments of this disclosure belong from the following description. That is, unintended effects associated with carrying out exemplary embodiments of this disclosure can also be derived by a person ordinary in the art to which the exemplary embodiments of this disclosure belong from the exemplary embodiments of this disclosure. [Brief explanation of the drawing]

[0023] [Figure 1] This is a perspective view showing a slitter according to an exemplary embodiment of the present invention. [Figure 2] This block diagram shows a partial configuration of a slitter according to an exemplary embodiment of the present invention. [Figure 3] This is a schematic diagram illustrating a method for calculating the incident angle of the raw material in a slitter according to an exemplary embodiment of the present invention. [Figure 4] This is a schematic diagram showing a part of a slitter according to an exemplary embodiment of the present invention. [Figure 5] This is a schematic diagram showing a method for calculating the first ejection angle of the first ejection section of the raw material in a slitter according to an exemplary embodiment of the present invention. [Figure 6] This is a schematic diagram showing a method for calculating the second ejection angle of the second ejection section of the raw material in a slitter according to an exemplary embodiment of the present invention. [Figure 7]This is a schematic diagram illustrating a method for calculating the incident angle of the raw material in a slitter according to an exemplary embodiment of the present invention. [Figure 8] This is a schematic diagram showing a method for calculating the first ejection angle of the first ejection section of the raw material in a slitter according to an exemplary embodiment of the present invention. [Figure 9] This is a schematic diagram showing a method for calculating the second ejection angle of the second ejection section of the raw material in a slitter according to an exemplary embodiment of the present invention. [Modes for carrying out the invention]

[0024] Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings. As a premise, terms and words used herein and in the claims should not be interpreted in a manner limited to their general or dictionary meanings, but rather in a manner consistent with the technical spirit of the present invention, based on the principle that inventors may appropriately define the concepts of terms in order to best describe their own invention.

[0025] Therefore, the embodiments described herein and the configurations shown in the drawings represent only one of the most preferred embodiments of the present invention and do not represent the entire technical concept of the present invention; thus, there may be a variety of equivalents and modifications that can be substituted for them at the time of filing.

[0026] Furthermore, in describing the present invention, if it is determined that a specific description of a related known configuration or function may obscure the gist of the present invention, such detailed description will be omitted.

[0027] Since embodiments of the present invention are provided to give a more complete explanation to an ordinary person, the shapes and sizes of the components in the drawings may be exaggerated, omitted, or shown schematically for the sake of clarity. Accordingly, the sizes and proportions of each component do not fully reflect the actual sizes and proportions.

[0028] In this disclosure, the vertical direction may refer to the Z direction, and the horizontal direction may refer to the X or Y direction. A vertical position may refer to a position along the vertical direction, vertical movement may refer to movement along the vertical direction, vertical movement distance may refer to the distance moved in the vertical direction, and horizontal distance may refer to the distance along the horizontal direction.

[0029] (First Embodiment) Figure 1 is a perspective view showing a slitter 10 according to an exemplary embodiment of the present invention. Figure 2 is a block diagram showing a part of the configuration of the slitter 10 according to an exemplary embodiment of the present invention.

[0030] Referring to Figures 1 and 2, the slitter 10 can perform a slitting process on the raw material 50. The slitter 10 can cut the raw material 50 in a direction parallel to the direction of travel of the raw material 50, separating the raw material 50 into multiple segments. Through the slitting process, the multiple segments of the raw material 50 are cut to each have a desired width.

[0031] The raw material 50 may be in the form of a sheet. In an exemplary embodiment, the raw material 50 may be an electrode raw material for secondary battery manufacturing. The electrode raw material may include a substrate and an electrode slurry layer coated on at least one of the two surfaces of the substrate. The substrate may be a current collector and may include, for example, copper or aluminum. The electrode slurry layer may include a positive electrode active material slurry or a negative electrode active material slurry.

[0032] In the slitter 10, the raw material 50 can be moved along a predetermined transport path. In the slitter 10, the raw material 50 may be configured to move along the predetermined transport path in a roll-to-roll manner. A supply roller for storing the rolled raw material 50 may be located at the starting point of the transport path of the raw material 50, and a winding roller for winding and storing the segments of the raw material 50 that have been separated from each other by the slitting process may be located at the end point of the transport path of the raw material 50.

[0033] The slitter 10 may include a cutter 110, an inlet roll 120, a first outlet roll 130, a second outlet roll 140, a first distance measuring sensor 210, a second distance measuring sensor 220, a third distance measuring sensor 230, and a monitoring device 300.

[0034] The cutter 110 may be configured to cut the raw material 50 in a direction parallel to the direction of travel of the raw material 50. The cutter 110 may include a first knife 111 and a second knife 113 arranged in the vertical direction (Z direction). The first knife 111 and the second knife 113 may each be circular knives. When viewed in cross-section, the outer edge profiles of the first knife 111 and the outer edge profiles of the second knife 113 may each be circles with a certain diameter. The first knife 111 may be positioned below the raw material 50, and the second knife 113 may be positioned above the raw material 50.

[0035] The first knife 111 and the second knife 113 can each rotate with respect to an axis of rotation parallel to the width direction (e.g., the Y direction) of the raw material 50. While the first knife 111 and the second knife 113 are rotating, the raw material 50 passing through the gap between the first knife 111 and the second knife 113 can be cut. The cutter 110 can cut the raw material 50 and separate it into a first ejection section 53 and a second ejection section 55. Figure 1 illustrates, but is not limited to, that the raw material 50 is separated into two segments by the cutter 110, and the cutter 110 may include multiple sets of knives arranged in the width direction (e.g., the Y direction) of the raw material 50, and the raw material 50 may be separated into three or more segments.

[0036] The incident roll 120 supports the incident portion 51 of the raw material 50 as it enters the cutter 110 and can guide the movement of the incident portion 51 of the raw material 50. The incident roll 120 may be positioned on the incident portion 51 of the raw material 50 and can support the upper surface of the incident portion 51 of the raw material 50. The incident roll 120 may be configured to rotate about an axis of rotation parallel to the width direction (e.g., the Y direction) of the raw material 50. When viewed in cross-section, the profile of the outer edge of the incident roll 120 that contacts the raw material 50 may be a circle with a constant diameter.

[0037] The incident roll 120 may be connected to an actuator and configured to move vertically (Z direction). The actuator may include a motor, a hydraulic cylinder, a pneumatic cylinder, or a combination thereof. The incident roll 120 moves vertically while in contact with the raw material 50, and can adjust the incident angle that the incident portion 51 of the raw material 50 entering the cutter 110 makes with the reference plane (RS in Figure 3). Here, the reference plane RS may be defined as any XY plane parallel to the vertical direction (Z direction) and can be in contact with the uppermost end of the first knife 111. The incident angle may be defined as the angle that the incident portion 51 of the raw material 50 extending between the incident roll 120 and the cutter 110 makes with the reference plane RS.

[0038] The first injection roll 130 supports the first injection portion 53 of the raw material 50 injected from the cutter 110 and can guide the movement of the first injection portion 53 of the raw material 50. The first injection roll 130 may be positioned on the first injection portion 53 of the raw material 50 and can support the upper surface of the first injection portion 53 of the raw material 50. The first injection roll 130 may be configured to rotate about an axis of rotation parallel to the width direction (e.g., the Y direction) of the raw material 50. When viewed in cross-section, the profile of the outer edge of the first injection roll 130 that contacts the raw material 50 may be a circle with a constant diameter.

[0039] The first ejection roll 130 may be connected to an actuator and configured to move vertically (in the Z direction). The actuator may include a motor, a hydraulic cylinder, a pneumatic cylinder, or a combination thereof. The first ejection roll 130 moves vertically while in contact with the first ejection section 53 of the raw material 50, and can adjust the first ejection angle that the first ejection section 53 of the raw material 50 makes with a reference plane RS. Here, the first ejection angle may be defined as the angle that the portion of the first ejection section 53 of the raw material 50 extending between the first ejection roll 130 and the cutter 110 makes with the reference plane RS.

[0040] The second injection roll 140 supports the second injection portion 55 of the raw material 50 injected from the cutter 110 and can guide the movement of the second injection portion 55 of the raw material 50. The second injection roll 140 may be positioned below the second injection portion 55 of the raw material 50 and can support the bottom surface of the second injection portion 55 of the raw material 50. The second injection roll 140 may be configured to rotate about an axis of rotation parallel to the width direction (e.g., the Y direction) of the raw material 50. When viewed in cross-section, the profile of the outer edge of the second injection roll 140 that contacts the raw material 50 may be a circle with a constant diameter.

[0041] The second ejection roll 140 may be connected to an actuator and configured to move vertically (in the Z direction). The actuator may include a motor, a hydraulic cylinder, a pneumatic cylinder, or a combination thereof. The second ejection roll 140 moves vertically while in contact with the second ejection section 55 of the raw material 50, and can adjust the second ejection angle that the second ejection section 55 of the raw material 50 makes with the reference plane RS. Here, the second ejection angle may be defined as the angle that the portion of the second ejection section 55 of the raw material 50 extending between the second ejection roll 140 and the cutter 110 makes with the reference plane RS.

[0042] The first distance measuring sensor 210 can detect the vertical position of the incident roll 120 and can detect the vertical travel distance of the incident roll 120. The first distance measuring sensor 210 may include a contact-type displacement sensor or a non-contact-type displacement sensor. In an exemplary embodiment, when the reference position of the incident roll 120 is defined as the position where the lower end of the incident roll 120 is in contact with the reference surface RS, the first distance measuring sensor 210 can detect and output the vertical travel distance of the incident roll 120 moving vertically (in the Z direction) from the reference position of the incident roll 120.

[0043] The second distance measuring sensor 220 can detect the vertical position of the first ejection roll 130 and can detect the vertical travel distance of the first ejection roll 130. The second distance measuring sensor 220 may include a contact-type displacement sensor or a non-contact-type displacement sensor. In an exemplary embodiment, when the reference position of the first ejection roll 130 is defined as the position where the lower end of the first ejection roll 130 is in contact with the reference surface RS, the second distance measuring sensor 220 can detect and output the vertical travel distance of the first ejection roll 130 moving vertically (in the Z direction) from the reference position of the first ejection roll 130.

[0044] The third distance measuring sensor 230 can detect the vertical position of the second ejection roll 140 and can detect the vertical travel distance of the second ejection roll 140. The third distance measuring sensor 230 may include a contact-type displacement sensor or a non-contact-type displacement sensor. In an exemplary embodiment, when the reference position of the second ejection roll 140 is defined as the position where the lower end of the second ejection roll 140 is in contact with the reference surface RS, the third distance measuring sensor 230 can detect and output the vertical travel distance of the second ejection roll 140 moving vertically (in the Z direction) from the reference position of the second ejection roll 140.

[0045] The monitoring device 300 receives data output from the first distance measuring sensor 210, the second distance measuring sensor 220, and the third distance measuring sensor 230, and can calculate the incident angle of the incident section 51 of the raw material 50, the first exit angle of the first exit section 53 of the raw material 50, and the second exit angle of the second exit section 55 of the raw material 50. The monitoring device 300 can provide the incident angle of the incident section 51 of the raw material 50, the first exit angle of the first exit section 53 of the raw material 50, and the second exit angle of the second exit section 55 of the raw material 50 to an external worker in real time via the display unit. The monitoring device 300 can determine whether each of the incident angle of the incident section 51 of the raw material 50, the first exit angle of the first exit section 53 of the raw material 50, and the second exit angle of the second exit section 55 of the raw material 50 is within a predetermined target value or target range.

[0046] The monitoring device 300 may include at least one memory device configured to store data, at least one processor configured to process data, and a control panel. For example, the memory device may include RAM (Random Access Memory) and / or ROM (Read Only Memory). The processor may include a CPU (Central Processing Unit), an MPU (Micro Processor Unit), and / or a GPU (Graphic Processing Unit). The monitoring device 300 may also include a computer and / or a server.

[0047] The monitoring device 300 may include an incident angle calculation unit 311, a first exit angle calculation unit 312, a second exit angle calculation unit 313, and a storage unit 320.

[0048] The incidence angle calculation unit 311 receives data from the first distance measuring sensor 210 regarding the vertical movement distance of the incidence roll 120 and can calculate the incidence angle of the incidence section 51 of the raw material 50 based on the vertical movement distance of the incidence roll 120. The first exit angle calculation unit 312 receives data from the second distance measuring sensor 220 regarding the vertical movement distance of the first exit roll 130 and can calculate the first exit angle of the first exit section 53 of the raw material 50 based on the vertical movement distance of the first exit roll 130. The second exit angle calculation unit 313 receives data from the third distance measuring sensor 230 regarding the vertical movement distance of the second exit roll 140 and can calculate the second exit angle of the second exit section 55 of the raw material 50 based on the vertical movement distance of the second exit roll 140. The incidence angle calculation unit 311, the first exit angle calculation unit 312, and the second exit angle calculation unit 313 may each include at least one processor configured to process data.

[0049] The storage unit 320 can store various data, such as data relating to the incident angle of the incident section 51 of the raw material 50 calculated by the incident angle calculation unit 311, data relating to the first exit angle of the first exit section 53 of the raw material 50 calculated by the first exit angle calculation unit 312, and data relating to the second exit angle of the second exit section 55 of the raw material 50 calculated by the second exit angle calculation unit 313. The storage unit 320 may include a memory device.

[0050] (Second Embodiment) Figure 3 shows the incident angle θ of the incident portion 51 of the raw material 50 in a slitter 10 according to an exemplary embodiment of the present invention. Id This is a schematic diagram showing how to calculate it.

[0051] Hereafter, referring to Figure 3 together with Figures 1 and 2, when the incident roll 120 descends from the reference plane RS, the incident angle θ of the incident portion 51 of the raw material 50 Id The method for calculating this will be explained. In Figure 3, the reference numeral "120i" indicates the reference position of the incident roll 120.

[0052] First, the incident angle calculation unit 311 of the monitoring device 300 calculates the vertical movement distance h of the incident roll 120 transmitted from the first distance measuring sensor 210. I Based on this, the first contact distance L is determined between the contact point P1 between the incident roll 120 and the incident portion 51 of the raw material 50, and the contact point P2 between the first knife 111 and the incident portion 51 of the raw material 50. Id The following can be calculated: When the circle formed by the outer edge of the incident roll 120 and the circle formed by the outer edge of the first knife 111 have a common internal tangent, the contact point P1 between the incident roll 120 and the incident portion 51 of the raw material 50 and the contact point P2 between the first knife 111 and the incident portion 51 of the raw material 50 can be on the common internal tangent. The vertical travel distance h of the incident roll 120 I This value is output from the first distance measuring sensor 210 and represents the distance the incident roll 120 has descended vertically (in the Z direction) from its reference position.

[0053] In an exemplary embodiment, the incident angle calculation unit 311 calculates the vertical movement distance h of the incident roll 120. I The horizontal distance L corresponds to the horizontal direction (X direction) between the center C1 of the incident roll 120 and the center C0 of the first knife 111. IO , entrance roll 121 radius r I Based on the radius R of the first knife 111, the distance L between the first contact points is... Id The following is calculated: The center C1 of the incident roll 120 can point to the center of the circle formed by the outer edge of the incident roll 120 that contacts the raw material 50, and the center C0 of the first knife 111 can point to the center of the circle formed by the outer edge of the first knife 111 that contacts the raw material 50. The distance L between the first contact points. Id This can be calculated using the following formula (1).

[0054]

number

[0055] Vertical movement distance h of the incident roll 120 I This can be provided by the first distance measuring sensor 210. The horizontal distance L corresponds to the horizontal direction (X direction) between the center C1 of the incident roll 120 and the center C0 of the first knife 111.IO , radius r of the incident roll 120 I The radius R of the first knife 111 may be provided from the memory unit 320.

[0056] Next, the incident angle calculation unit 311 calculates the distance L between the first contacts. Id Based on this, the incidence angle θ of the incident portion 51 of the raw material 50 Id The incident angle calculation unit 311 can calculate the distance L between the first contacts. Id , radius r of the incident roll 120 I Based on the radius R of the first knife 111, the incidence angle θ of the incident portion 51 of the raw material 50 Id The following can be calculated: When the incident roll 120 descends from the reference position, the incident angle θ of the incident portion 51 of the raw material 50. Id It can have negative values. Incident angle θ Id This can be calculated using the following formula (2).

[0057]

number

[0058] In formula (2),

number

number

[0059] Figure 4 is a schematic diagram showing a part of the slitter 10 according to an exemplary embodiment of the present invention.

[0060] Referring to Figures 1 to 4, in the comparative example's method for calculating the angle of incidence, the angle between the reference plane and a straight line passing through one of the quarter points P1' of the circle formed by the outer edge of the incident roll 120 and one of the quarter points P2' of the circle formed by the outer edge of the first knife 111 is calculated, and the angle of incidence θ of the incident portion 51 of the raw material 50 is calculated. Id ' can be calculated. However, as shown in Figure 4, the incident angle θ calculated by the incident angle calculation method related to the comparative example Id ' is the incident angle θ calculated considering the contact point P1 between the incident roll 120 and the incident portion 51 of the raw material 50, and the contact point P2 between the first knife 111 and the incident portion 51 of the raw material 50. Id You can see that there is a difference.

[0061] Figure 5 shows the first ejection angle of the first ejection section 53 of the raw material 50 in a slitter 10 according to an exemplary embodiment of the present invention. θUu This is a schematic diagram showing how to calculate it.

[0062] Hereinafter, with reference to Figure 5 in conjunction with Figures 1 and 2, when the first ejection roll 130 rises from the reference plane RS, the first ejection angle θ of the first ejection section 53 of the raw material 50. Uu The method for calculating this will be explained. In Figure 5, the reference numeral "130i" indicates the reference position of the first injection roll 130.

[0063] First, the first ejection angle calculation unit 312 of the monitoring device 300 calculates the vertical movement distance h of the first ejection roll 130 transmitted from the second distance measuring sensor 220. U Based on this, the distance L between the contact point P3 between the first ejection roll 130 and the first ejection section 53 of the raw material 50 and the contact point P4 between the first knife 111 and the first ejection section 53 of the raw material 50 is determined. Uu The following can be calculated: When the circle formed by the outer edge of the first injection roll 130 and the circle formed by the outer edge of the first knife 111 have a common internal tangent, the contact point P3 between the first injection roll 130 and the first injection section 53 of the raw material 50 and the contact point P4 between the first knife 111 and the first injection section 53 of the raw material 50 can be on the common internal tangent. The vertical travel distance h of the first injection roll 130 UThis value is output from the second distance measuring sensor 220 and represents the distance the first ejection roll 130 has risen vertically (in the Z direction) from its reference position.

[0064] In an exemplary embodiment, the first ejection angle calculation unit 312 calculates the vertical movement distance h of the first ejection roll 130. U , the horizontal distance L corresponding to the horizontal direction (X direction) between the center C2 of the first ejection roll 130 and the center C0 of the first knife 111. UO , the radius r of the first ejection roll 130 U Based on the radius R of the first knife 111, the distance L between the second contact points is... Uu The following is calculated: The center C2 of the first injection roll 130 can point to the center of the circle formed by the outer edge of the first injection roll 130 that contacts the raw material 50. The distance L between the second contact points. Uu This can be calculated using the following formula (3).

[0065]

number

[0066] The vertical travel distance h of the first ejection roll 130 U This can be provided by the second distance measuring sensor 220. The horizontal distance L corresponds to the horizontal direction (X direction) between the center C2 of the first ejection roll 130 and the center C0 of the first knife 111. UO , the radius r of the first ejection roll 130 U The radius R of the first knife 111 may be provided from the memory unit 320.

[0067] Next, the first exit angle calculation unit 312 calculates the distance L between the second contacts. Uu Based on this, the first ejection angle θ of the first ejection section 53 of the raw material 50 Uu The following can be calculated. In an exemplary embodiment, the first exit angle calculation unit 312 calculates the second contact distance L Uu , the radius r of the first ejection roll 130 U Based on the radius R of the first knife 111, the first ejection angle θ of the first ejection section 53 of the raw material 50. UuThe first ejection angle θ of the first ejection section 53 of the raw material 50 can be calculated when the first ejection roll 130 rises from the reference position. Uu This can have a positive value. First exit angle θ Uu This can be calculated using the following formula (4).

[0068]

number

[0069] In formula (4),

number

number

[0070] Figure 6 shows the second ejection angle θ of the second ejection section 55 of the raw material 50 in a slitter 10 according to an exemplary embodiment of the present invention. Ld This is a schematic diagram showing how to calculate it.

[0071] Hereafter, referring to Figure 6 in conjunction with Figures 1 and 2, when the second injection roll 140 descends from the reference plane RS, the second injection angle θ of the second injection section 55 of the raw material 50 is observed. Ld The method for calculating this will be explained. In Figure 6, the reference numeral "140i" indicates the reference position of the second injection roll 140.

[0072] First, the second ejection angle calculation unit 313 of the monitoring device 300 calculates the vertical movement distance h of the second ejection roll 140 transmitted from the third distance measuring sensor 230. L Based on this, the third contact distance L is between the contact point P5 between the second injection roll 140 and the second injection section 55 of the raw material 50, and the contact point P6 between the first knife 111 and the second injection section 55 of the raw material 50. Ldcan be calculated. When the circle formed by the outer edge of the second delivery roll 140 and the circle formed by the outer edge of the first knife 111 have a common internal tangent, the contact point P5 between the second delivery roll 140 and the second delivery portion 55 of the raw fabric 50 and the contact point P6 between the first knife 111 and the second delivery portion 55 of the raw fabric 50 can be on the common internal tangent. The vertical movement distance h of the second delivery roll 140 L is a value output from the third distance measurement sensor 230 and is the distance by which the second delivery roll 140 has descended in the vertical direction (Z direction) from the reference position of the second delivery roll 140.

[0073] In an exemplary embodiment, the second delivery angle calculation unit 313 calculates the vertical movement distance h of the second delivery roll 140 L , the horizontal distance L corresponding to the horizontal direction (X direction) between the center C3 of the second delivery roll 140 and the center C0 of the first knife 111 LO , the radius r of the second delivery roll 140 L , and based on the radius R of the first knife 111, calculates the third contact point distance L Ld . The center C3 of the second delivery roll 140 can refer to the center of the circle formed by the outer edge of the second delivery roll 140 that contacts the raw fabric 50. The third contact point distance L Ld can be calculated by the following formula (5).

[0074]

Equation

[0075] The vertical movement distance h of the second delivery roll 140 L can be provided by the third distance measurement sensor 230. The horizontal distance L corresponding to the horizontal direction (X direction) between the center C3 of the second delivery roll 140 and the center C0 of the first knife 111 LO , the radius r of the second delivery roll 140 L , and the radius R of the first knife 111 can be provided from the storage unit 320.

[0076] Next, the second delivery angle calculation unit 313, based on the third contact point distance L Ld , calculates the second delivery angle θ of the second delivery portion 55 of the raw fabric 50Ld can be calculated. In an exemplary embodiment, the second emission angle calculation unit 313 calculates the second emission angle θ of the second emission unit 55 of the raw fabric 50 based on the third contact point distance L Ld , the radius r of the second emission roll 140 L , and the radius R of the first knife 111. When the second emission roll 140 descends from the reference position, the second emission angle θ of the second emission unit 55 of the raw fabric 50 Ld can have a negative value. The second emission angle θ Ld can be calculated by the following formula (6). Ld In formula (6),

[0077]

Number

[0078] In formula (6),

Number

Number

[0079] FIG. 7 is a schematic diagram showing a method for calculating the incident angle θ of the incident unit 51 of the raw fabric 50 in the slitter 10 according to an exemplary embodiment of the present invention. Iu

[0080] Hereinafter, referring to FIG. 7 together with FIGS. 1 and 2, a method for calculating the incident angle θ of the incident unit 51 of the raw fabric 50 when the incident roll 120 ascends from the reference plane RS will be described. Iu

[0081] First, the incident angle calculation unit 311 of the monitoring device 300 calculates the vertical movement distance h of the incident roll 120 transmitted from the first distance measurement sensor 210 I ​​Based on this, the first contact distance L is determined between the contact point P1 between the incident roll 120 and the incident portion 51 of the raw material 50, and the contact point P2 between the first knife 111 and the incident portion 51 of the raw material 50. Iu The vertical travel distance h of the incident roll 120 can be calculated. I This value is output from the first distance measuring sensor 210 and represents the distance the incident roll 120 has risen vertically (in the Z direction) from its reference position.

[0082] In an exemplary embodiment, the incident angle calculation unit 311 calculates the vertical movement distance h of the incident roll 120. I The horizontal distance L corresponds to the horizontal direction (X direction) between the center C1 of the incident roll 120 and the center C0 of the first knife 111. IO , entrance roll 121 radius r I Based on the radius R of the first knife 111, the distance L between the first contact points is... Iu Calculate the distance L between the first contact points. Iu This can be calculated using the following formula (7).

[0083]

number

[0084] Vertical movement distance h of the incident roll 120 I This can be provided by the first distance measuring sensor 210. The horizontal distance L corresponds to the horizontal direction (X direction) between the center C1 of the incident roll 120 and the center C0 of the first knife 111. IO , radius r of the incident roll 120 I The radius R of the first knife 111 may be provided from the memory unit 320.

[0085] Next, the incident angle calculation unit 311 calculates the distance L between the first contacts. Iu Based on this, the incidence angle θ of the incident portion 51 of the raw material 50 Iu The incident angle calculation unit 311 can calculate the distance L between the first contacts. Iu , radius r of the incident roll 120 I Based on the radius R of the first knife 111, the incidence angle θ of the incident portion 51 of the raw material 50Iu The following can be calculated: When the incident roll 120 rises from the reference position, the incident angle θ of the incident portion 51 of the raw material 50. Iu It can have a positive value. Incident angle θ Iu This can be calculated using the following formula (8).

[0086]

number

[0087] In formula (8),

number

number

[0088] Figure 8 shows the first ejection angle θ of the first ejection section 53 of the raw material 50 in a slitter 10 according to an exemplary embodiment of the present invention. Ud This is a schematic diagram showing how to calculate it.

[0089] Hereinafter, with reference to Figure 8 in conjunction with Figures 1 and 2, when the first ejection roll 130 descends from the reference plane RS, the first ejection angle θ of the first ejection section 53 of the raw material 50. Ud I will explain how to calculate it.

[0090] First, the first ejection angle calculation unit 312 of the monitoring device 300 calculates the vertical movement distance h of the first ejection roll 130 transmitted from the second distance measuring sensor 220. U Based on this, the distance L between the contact point P3 between the first ejection roll 130 and the first ejection section 53 of the raw material 50 and the contact point P4 between the first knife 111 and the first ejection section 53 of the raw material 50 is determined. Ud The vertical travel distance h of the first ejection roll 130 can be calculated. UThis value is output from the second distance measuring sensor 220 and represents the distance the first ejection roll 130 has descended vertically (in the Z direction) from its reference position.

[0091] In an exemplary embodiment, the first ejection angle calculation unit 312 calculates the vertical movement distance h of the first ejection roll 130. U , the horizontal distance L corresponding to the horizontal direction (X direction) between the center C2 of the first ejection roll 130 and the center C0 of the first knife 111. UO , the radius r of the first ejection roll 130 U Based on the radius R of the first knife 111, the distance L between the second contact points is determined. Ud Calculate the distance L between the second contact points. Ud This can be calculated using the following formula (9).

[0092]

number

[0093] The vertical travel distance h of the first ejection roll 130 U This can be provided by the second distance measuring sensor 220. The horizontal distance L corresponds to the horizontal direction (X direction) between the center C2 of the first ejection roll 130 and the center C0 of the first knife 111. UO , the radius r of the first ejection roll 130 U The radius R of the first knife 111 may be provided from the memory unit 320.

[0094] Next, the first exit angle calculation unit 312 calculates the distance L between the second contacts. Ud Based on this, the first ejection angle θ of the first ejection section 53 of the raw material 50 Ud The following can be calculated. In an exemplary embodiment, the first exit angle calculation unit 312 calculates the second contact distance L Ud , the radius r of the first ejection roll 130 U Based on the radius R of the first knife 111, the first ejection angle θ of the first ejection section 53 of the raw material 50. Ud The first ejection angle θ of the first ejection section 53 of the raw material 50 can be calculated when the first ejection roll 130 descends from the reference position. UdThis can have negative values. First exit angle θ Ud This can be calculated using the following formula (10).

[0095]

number

[0096] In formula (10),

number

number

[0097] Figure 9 shows the second ejection angle θ of the second ejection section 55 of the raw material 50 in a slitter 10 according to an exemplary embodiment of the present invention. Lu This is a schematic diagram showing how to calculate it.

[0098] Hereinafter, referring to Figure 9 in conjunction with Figures 1 and 2, when the second injection roll 140 rises from the reference plane RS, the second injection angle θ of the second injection section 55 of the raw material 50. Lu I will explain how to calculate it.

[0099] First, the second ejection angle calculation unit 313 of the monitoring device 300 calculates the vertical movement distance h of the second ejection roll 140 transmitted from the third distance measuring sensor 230. L Based on this, the third contact distance L is between the contact point P5 between the second injection roll 140 and the second injection section 55 of the raw material 50, and the contact point P6 between the first knife 111 and the second injection section 55 of the raw material 50. Lu The vertical travel distance h of the second ejection roll 140 can be calculated. L This value is output from the third distance measuring sensor 230 and represents the distance the second ejection roll 140 has risen vertically (in the Z direction) from its reference position.

[0100] In an exemplary embodiment, the second ejection angle calculation unit 313 calculates the vertical movement distance h of the second ejection roll 140. L The horizontal distance L corresponds to the horizontal direction (X direction) between the center C3 of the second ejection roll 140 and the center C0 of the first knife 111. LO , the radius r of the second ejection roll 140 L Based on the radius R of the first knife 111, the distance L between the third contact points is... Lu Calculate the distance L between the third contact points. Lu This can be calculated using the following formula (11).

[0101]

number

[0102] The vertical travel distance h of the second ejection roll 140 L This can be provided by the third distance measuring sensor 230. The horizontal distance L corresponds to the horizontal direction (X direction) between the center C3 of the second ejection roll 140 and the center C0 of the first knife 111. LO , the radius r of the second ejection roll 140 L The radius R of the first knife 111 may be provided from the memory unit 320.

[0103] Next, the second exit angle calculation unit 313 calculates the distance L between the third contacts. Lu Based on this, the second ejection angle θ of the second ejection section 55 of the raw material 50 Lu The second exit angle calculation unit 313 can calculate the distance L between the third contacts. In an exemplary embodiment, the second exit angle calculation unit 313 calculates the distance L between the third contacts. Lu , the radius r of the second ejection roll 140 L Based on the radius R of the first knife 111, the second ejection angle θ of the second ejection section 55 of the raw material 50. Lu The second ejection angle θ of the second ejection section 55 of the raw material 50 can be calculated when the second ejection roll 140 rises from the reference position. Lu This can have a positive value. Second exit angle θ Lu This can be calculated using the following formula (12).

[0104]

number

[0105] In formula (12),

number

number

[0106] In the slitting process, the entry and exit injection angles of the raw material 50 are major factors in the process, affecting the quality of the cut surface of the raw material 50 and the occurrence of defects such as burrs. Therefore, the entry and exit injection angles of the raw material 50 are measured, and the vertical position of the guide rolls that guide the raw material 50 is controlled so that the entry and exit injection angles of the raw material 50 meet the target value. Generally, in the slitting process, one method for detecting the entry and exit injection angles of the raw material 50 is to use an angle sensor. In the method using an angle sensor, the angle sensor is placed on top of the raw material 50 to measure the entry and exit injection angles of the raw material 50. However, the weight of the angle sensor causes the raw material 50 to sag, making accurate angle measurement difficult, and angle measurement is only possible when the movement of the raw material 50 is stopped. Therefore, it is not possible to measure the entry and exit injection angles of the raw material 50 in real time during the slitting process.

[0107] According to an exemplary embodiment of the present invention, the entry and exit angles of the raw material 50 can be monitored in real time using the vertical travel distance of guide rolls (i.e., an entrance roll 120, a first exit roll 130, and a second exit roll 140) configured to adjust the entry and exit angles of the raw material 50.

[0108] Furthermore, according to exemplary embodiments of the present invention, when theoretically deriving the entry and exit angles of the raw material 50 using trigonometric functions, the entry and exit angles of the raw material 50 are derived by considering the contact points between the raw material 50 and the guide rolls (i.e., the entrance roll 120, the first exit roll 130, and the second exit roll 140) and the contact points between the raw material 50 and the knife. As a result, there are no theoretical errors, and the entry and exit angles of the raw material 50 can be accurately derived. Therefore, the entry and exit angles of the raw material 50, which are the main factors in the slitting process, can be precisely monitored, and the reliability of products manufactured by the slitting process can be improved.

[0109] The present invention has been described in more detail above with reference to the drawings and embodiments. However, the configurations described in the drawings or embodiments described herein are merely one embodiment of the present invention and do not represent the entire technical concept of the present invention. Therefore, at the time of filing, there may be a variety of equivalents and modifications that can substitute for them.

Claims

1. A cutter comprising a first knife and a second knife arranged vertically, configured to cut a raw material passing between the first knife and the second knife, and to separate the raw material into a first ejection section and a second ejection section, An incident roll is configured to move in the vertical direction and adjust the angle of incidence that the incident portion of the raw material entering the cutter makes with a reference plane, A first distance measuring sensor configured to detect the vertical movement distance of the incident roll, which is the distance the incident roll has moved in the vertical direction from the reference plane, A first injection roll is configured to move in the vertical direction and adjust the first injection angle that the first injection portion of the raw material makes with the reference plane, A second distance measuring sensor configured to detect the vertical movement distance of the first ejection roll, which is the distance the first ejection roll has moved in the vertical direction from the reference plane, A second injection roll is configured to move in the vertical direction and adjust the second injection angle that the second injection portion of the raw material makes with the reference plane, A slitter comprising: a third distance measuring sensor configured to detect the vertical movement distance of the second ejection roll, which is the distance the second ejection roll has moved in the vertical direction from the reference plane.

2. The slitter according to claim 1, further comprising a monitoring device configured to calculate the incident angle based on the vertical movement distance of the incident roll.

3. The monitoring device is Based on the vertical travel distance of the incident roll, the horizontal distance along the horizontal direction between the center of the incident roll and the center of the first knife, the radius of the incident roll, and the radius of the first knife, the first contact distance between the contact point between the incident roll and the incident portion of the raw material, and between the contact point between the first knife and the incident portion of the raw material, The slitter according to claim 2, configured to calculate the incident angle based on the distance between the first contacts, the radius of the incident roll, and the radius of the first knife.

4. When the incident roll descends from the reference plane, the distance between the first contacts is calculated by the following formula (1): [Math 1] In formula (1), L Ｉｄ This is the distance between the first contacts, L ＩＯ This is the horizontal distance between the center of the incident roll and the center of the first knife, h Ｉ This is the vertical travel distance of the incident roll, R is the radius of the first knife, r Ｉ is the radius of the incident roll, When the incident roll descends from the reference plane, the incident angle is calculated by the following formula (2): [Math 2] In formula (2), θ Ｉｄ The slitter according to claim 3, wherein is the angle of incidence.

5. When the incident roll rises from the reference plane, the distance between the first contacts is calculated by the following formula (3): [Math 3] In formula (3), L Ｉｕ This is the distance between the first contacts, L ＩＯ This is the horizontal distance between the center of the incident roll and the center of the first knife, h Ｉ This is the vertical travel distance of the incident roll, R is the radius of the first knife, r Ｉ is the radius of the said inlet roll, When the incident roll rises from the reference plane, the incident angle is calculated by the following formula (4): [Math 4] In formula (4), θ Ｉｕ The slitter according to claim 3, wherein is the angle of incidence.

6. The slitter according to claim 1, further comprising a monitoring device configured to calculate the first ejection angle based on the vertical movement distance of the first ejection roll.

7. The monitoring device is Based on the vertical travel distance of the first injection roll, the horizontal distance along the horizontal direction between the center of the first injection roll and the center of the first knife, the radius of the first injection roll, and the radius of the first knife, the second contact distance between the contact point between the first injection roll and the first injection section of the raw material, is calculated. The slitter according to claim 6, configured to calculate the first ejection angle based on the distance between the second contacts, the radius of the first ejection roll, and the radius of the first knife.

8. When the first ejection roll descends from the reference plane, the distance between the second contacts is calculated by the following formula (5): [Math 5] In formula (5), L Ｕｄ This is the distance between the second contacts, L ＵＯ This is the horizontal distance between the center of the first injection roll and the center of the first knife, h Ｕ is the vertical travel distance of the first ejection roll, R is the radius of the first knife, r Ｕ is the radius of the first ejection roll, When the first ejection roll descends from the reference plane, the first ejection angle is calculated by the following formula (6): [Math 6] In formula (6), θ Ｕｄ The slitter according to claim 7, wherein is the first emission angle.

9. When the first ejection roll rises from the reference plane, the distance between the second contacts is calculated by the following formula (7): [Number 7] In formula (7), L Ｕｕ This is the distance between the second contacts, L ＵＯ This is the horizontal distance between the center of the first injection roll and the center of the first knife, h Ｕ is the vertical travel distance of the first ejection roll, R is the radius of the first knife, r Ｕ is the radius of the first ejection roll, When the first ejection roll rises from the reference plane, the first ejection angle is calculated by the following formula (8): [Number 8] In formula (8), θ Ｕｕ The slitter according to claim 7, wherein is the first emission angle.

10. The slitter according to claim 1, further comprising a monitoring device configured to calculate the second ejection angle based on the vertical movement distance of the second ejection roll.

11. The monitoring device is Based on the vertical travel distance of the second injection roll, the horizontal distance along the horizontal direction between the center of the second injection roll and the center of the first knife, the radius of the second injection roll, and the radius of the first knife, the third contact point distance between the contact point between the second injection roll and the second injection section of the raw material and the contact point between the first knife and the second injection section of the raw material is calculated. The slitter according to claim 10, configured to calculate the second ejection angle based on the distance between the third contacts, the radius of the second ejection roll, and the radius of the first knife.

12. When the second injection roll descends from the reference plane, the distance between the third contacts is calculated by the following formula (9): [Number 9] In formula (9), L Ｌｄ This is the distance between the third contacts, L ＬＯ This is the horizontal distance between the center of the second injection roll and the center of the first knife, h Ｌ is the vertical travel distance of the second ejection roll, R is the radius of the first knife, r Ｌ is the radius of the second ejection roll, When the second ejection roll descends from the reference plane, the second ejection angle is calculated by the following formula (10): [Number 10] In formula (10), θ Ｌｄ The slitter according to claim 11, wherein is the second emission angle.

13. When the second injection roll rises from the reference plane, the distance between the third contacts is calculated by the following formula (11): [Math 11] In formula (11), L Ｌｕ This is the distance between the third contacts, L ＬＯ This is the horizontal distance between the center of the second injection roll and the center of the first knife, h Ｌ is the vertical travel distance of the second ejection roll, R is the radius of the first knife, r Ｌ is the radius of the second ejection roll, When the second ejection roll rises from the reference plane, the second ejection angle is calculated by the following formula (12): [Math 12] In formula (12), θ Ｌｕ The slitter according to claim 11, wherein is the second emission angle.

14. The incident roll supports the upper surface of the incident portion of the raw material, The first injection roll supports the upper surface of the first injection portion of the raw material, The slitter according to claim 1, wherein the second injection roll supports the bottom surface of the second injection portion of the raw material.

15. Further including monitoring equipment, The monitoring device is The incidence angle is calculated based on the vertical movement distance of the incidence roll. Based on the vertical movement distance of the first ejection roll, the first ejection angle is calculated. The slitter according to claim 14, configured to calculate the second ejection angle based on the vertical movement distance of the second ejection roll.

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