KR101717857B1 - Method and system for producing cutting product - Google Patents

Abstract

According to an aspect of the present invention, there is provided a method of producing a cut product and a production system of the cut product, the method comprising the steps of: calculating a defect distribution density along a width direction of a fabric based on defect information of the fabric; A unit product having a first size is allocated to a region where the distribution density is relatively large, and a virtual cut line is determined such that a unit product having a second size larger than the first size is allocated to a region having a relatively small defect- The method comprising the steps of:

Description

TECHNICAL FIELD [0001] The present invention relates to a production method and a production system for a foundation product,

The present invention relates to a production method and a production system of a cut product.

In general, a product on a film (or sheet) is produced in the form of a fabric having a size larger than the size of the product to be actually used. For example, optical members such as a polarizing plate and a retardation plate used for a display device and the like are the same. For example, considering the various factors such as the efficiency of the manufacturing process and the fluctuation of the demand for the product, the polarizer supplier (manufacturer) has to fabricate a polarizer having a length and width larger in size than the product .

Further, the fabric is, in most cases, produced in a strip shape through a continuous process, and the fabric is wound on a roll and stored. Thereafter, the fabric wound on the roll is taken out and cut into a unit product of a predetermined size.

In general, in cutting a fabric, a method of cutting a plurality of unit products simultaneously in a single cutting process is widely used. For example, a cutter frame equipped with a plurality of cutters is used. At this time, the yield of the unit product that is cut depends on how the cutting is carried out. Lower cutting efficiency increases scrap, or waste, that is discarded after cutting, which ultimately leads to increased product manufacturing costs.

Also, depending on the type of fabric, there may be undesirable defects in the product. In this case, defects are considered for quality (quality improvement) at the time of cutting the fabric. Generally, defects are formed in the manufacturing process of the fabric or the winding process.

For example, a polarizing plate used in a display device such as a TV is manufactured by (1) a step of obtaining a polarizer, (2) a step of laminating a polarizer protective layer, and (3) a step of laminating a protective film or a release film do. In the step of obtaining a polarizer, a polyvinyl alcohol (PVA) film is mainly dyed and stretched to obtain a polarizer. In the step of laminating the polarizer protective layer, a triacetylcellulose (TAC) film is attached to both surfaces of the polarizer through an adhesive to laminate the polarizer protective layer. At this time, the polarizing plate can be wound on the roll in the course of each step, and at least the product that has undergone the step (3) is wound and held on a roll. When the film is wound on a roll in this manner, it is advantageous not only in terms of transportability to each step, but also ease of storage and handling in the cutting process.

Defects of the fabric mainly occur in the stretching or winding step. For example, in the stretching process, both end portions of the fabric are fixed to the stretching device, and defects may occur in the fixing portions. In the case of the winding process, defects may occur at the end portion fixed to the roll. Further, in the case of the winding process, if there is a scratch on the roll, a periodic defect may occur in a region contacting with the roll due to the nature of the rotating roll. If defects are identified in the cut unit product, the loss of the product becomes large.

Accordingly, when cutting a fabric having defects, defect inspection is performed prior to cutting, and cuts are made to avoid defects so that defects are not included in the cut unit products. Also, the yield of the unit product cut as described above is taken into consideration.

In general, the cutting of the fabric may include an inspection process for inspecting the position (distribution) of the defect, a yield calculation process for calculating the yield of the unit product when the cutting is performed virtually on the basis of the defect information, It is proceeding through a cutting process in which the yield is determined to be higher than a predetermined value (highest yield) based on the calculated value.

For example, Korean Patent Laid-Open No. 10-2008-0033863, Korean Patent No. 10-1179071, and Korean Patent No. 10-1315102 disclose techniques related to the above.

In cutting the fabric as described above, it is cut by avoiding defects, but cutting is performed considering the highest yield. In this case, the yield is an improvement rate, which is calculated by dividing the total area of the unit product obtained after the cutting by the total area of the cutting fabric beforehand, and is usually expressed as a percentage (%).

However, in the cutting method according to the prior art, for example, the following problems are pointed out.

In recent years, most fabrics have been manufactured in very large sizes. This also takes into account factors such as the efficiency of fabric manufacturing process and the fluctuation of demand for products. For such large width fabrics, a slitting cut in the lengthwise direction of the fabric may be required. However, the cutting method according to the prior art is confined to the cutting of a unit product for the greatest area yield, and the slitting cutting is not considered. As a result, it is difficult to see the method considering the maximum cutting efficiency.

Korean Patent Publication No. 10-2008-0033863 Korean Patent Registration No. 10-1179071 Korean Patent Registration No. 10-1315102

An object of the present invention is to provide a production method and a production system of a cut product which can improve the productivity by selecting an optimum cutting position based on the defect distribution density of the fabric.

Another object of the present invention is to provide a method of producing a cut product and a cutting system that can improve the productivity by selecting an optimum cutting position.

According to an aspect of the present invention, there is provided a method of manufacturing a defect inspection apparatus, comprising the steps of: calculating a defect distribution density along a width direction of a fabric based on defect information of a fabric; And determining a virtual cut line so that a unit product having a size larger than the first size is allocated to a region where a widthwise defect distribution density is relatively small, / RTI >

Further, the defect distribution density in the width direction of the fabric can be calculated according to the number of defects per unit width.

The method of producing the cut product may further include calculating a defect distribution density along the length direction of the fabric and calculating a position at which the fabric is divided into two or more regions along the length direction of the fabric, May further comprise a step of determining.

Further, the virtual cut line can be independently determined for each of two or more divided regions.

In addition, the defect distribution density in the longitudinal direction of the fabric can be calculated in accordance with the number of defects per unit length.

In addition, the virtual cutting line can be determined so that the area efficiency becomes equal to or larger than a predetermined value at the time of cutting the fabric.

Further, the virtual cut line may be determined as an imaginary cut line that maximizes the flatness rate among a plurality of virtual cut lines having the same area efficiency at the time of cutting the cloth.

According to still another aspect of the present invention, defect density distributions along the length and width directions of the fabric are calculated based on a step of generating a defect distribution map of the fabric by inspecting defects on the fabric and a defect distribution map of the fabric, A unit product having a first size is allocated to an area having a relatively large width defect distribution density and a unit product having a relatively large width distribution density is allocated to a region having a relatively small width distribution density Determining a virtual cut line reflecting the size and position of the unit product to be cut so that a unit product having a large second size is allocated.

Further, the defect distribution density in the width direction of the fabric can be calculated according to the number of defects per unit width.

The method of producing the cut product may further include determining a position to divide the fabric into two or more regions along the length direction of the fabric based on the longitudinal defect distribution density of the fabric.

Further, the virtual cut line can be independently determined for each of two or more divided regions.

In addition, the defect distribution density in the longitudinal direction of the fabric can be calculated in accordance with the number of defects per unit length.

In addition, the virtual cutting line can be determined so that the area efficiency becomes equal to or larger than a predetermined value at the time of cutting the fabric.

Further, the virtual cut line may be determined as an imaginary cut line that maximizes the flatness rate among a plurality of virtual cut lines having the same area efficiency at the time of cutting the cloth.

According to still another aspect of the present invention, there is provided a defect inspection method for inspecting a defect in at least one of a longitudinal direction and a width direction of a fabric based on a defect inspection mode for generating a defect distribution map of a fabric by inspecting a defect on the fabric, A unit product having a first size is allocated to an area having a relatively large defect density distribution in the width direction and a unit product having a relatively large defect density distribution in a width direction is calculated based on the calculated defect distribution density, And a mode for determining a virtual cut line reflecting the size and position of the unit product to be cut so that a unit product having a second size larger than the first size is allocated.

INDUSTRIAL APPLICABILITY As described above, the production method and the production system of the cut product related to the embodiment of the present invention have the following effects.

The fabric can be divided at the optimum position based on the defect distribution density in the longitudinal direction of the fabric. It is also possible to independently establish a cut plan for each of the divided fabrics. Specifically, the virtual cut lines for each of the divided fabrics can be independently determined. In addition, it is possible to determine an optimal virtual cut line that maximizes the flatness rate based on the defect distribution density in the width direction of the fabric. Further, the size of the unit product to be cut and the position on the raw end of the unit product can be selected based on the defect distribution density of the fabric.

It is also possible to determine the number of strips that can be produced in the width direction of the fabric through various possible combinations. At this time, one or more virtual cut lines that maximize the area efficiency can be derived. In addition, it is possible to determine an optimal virtual cut line that maximizes the yield rate based on the defect information of the fabric. Therefore, by selecting the optimum cutting position through the virtual cutting, the productivity can be improved.

1 is a plan view showing a fabric according to the present invention.
2 is a plan view for explaining fabrics and strips related to the present invention.
3 is a plan view for explaining a defect distribution map of a fabric related to the present invention.
4 is a plan view for explaining defect distribution density related to the present invention.
5 is a flowchart showing a production method of a cut product related to the first embodiment of the present invention.
6 is a flowchart showing a production method of a cut product related to the second embodiment of the present invention.
7 is a block diagram showing a production system of a cut product related to an embodiment of the present invention.
8 is a plan view of a fabric for explaining a production method of a cut product related to the third embodiment of the present invention.
9 is a plan view of a fabric for explaining a production method of a cut product related to the fourth embodiment of the present invention.

Hereinafter, a production method of a cut product and a production system of a cut product according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In addition, the same or corresponding reference numerals are given to the same or corresponding reference numerals regardless of the reference numerals, and redundant description thereof will be omitted. For convenience of explanation, the size and shape of each constituent member shown in the drawings are exaggerated or reduced .

Fig. 1 is a plan view showing a fabric 10 related to the present invention, and Fig. 2 is a plan view for explaining a fabric 10 and strips 11 to 13 associated with the present invention.

3 is a plan view for explaining a defect distribution map 30 of a fabric related to the present invention, and FIG. 4 is a plan view for explaining defect distribution density 40 and 50 associated with the present invention.

In this document, the "fabric" to be cut is a base material on a film (or sheet), which is included in the base material if it has a relatively large size before the cutting. In addition, in the present invention, the kind and laminated structure of the fabric 10 are not particularly limited. The fabric 10 can be selected from an optical member or a protective member on a film (or sheet), for example, applied to an electric or electronic product or the like. The fabric 10 may be selected from optical members applied to a more specific example, a display device such as a TV or a monitor. Further, the fabric 10 includes a single layer body and / or a laminate body.

In one example, the fabric 10 may be selected from a polarizer. At this time, the polarizing plate may have a laminated structure including a polarizer and a polarizer protective layer formed on the polarizer. The polarizer may be selected from, for example, a polyvinyl alcohol (PVA) film or the like which is dyed and stretched. The polarizer protective layer may be selected from, for example, triacetylcellulose (TAC) film and attached to both sides of the polarizer through an adhesive. In addition, the polarizing plate may have a laminated structure further comprising a protective film and / or a release film formed on the polarizer protective layer.

The fabric 10 may be, for example, in the form of a strip, which can be drawn out while being wound on a roll. The width X and the length Y of the fabric 10 are not limited. The fabric 10 may have a width X of, for example, 40 mm to 2,500 mm and a length Y of 1,000 cm to 3,000 m.

Further, in the present invention, the fabric 10 to be cut includes the defect d, and / or the defect d. The defect (d) is an unfavorable defect point in the product, which may be formed in the manufacturing process of the fabric 10 and / or the winding process. Defects include, for example, foreign matter, contamination, twisting, scratches, and / or bubbles.

The defect (d) of the fabric 10 can be inspected by the inspector or defect inspection apparatus constituting the cutting system. In one embodiment, the defect (d) can be inspected by a defect inspecting unit, and the defect inspecting unit can include an defect inspecting apparatus for inspecting the defect (d) by an automatic scanning method through an image. Further, the defect inspection part may further include a display part. Defect information of the fabric 10 inspected by the defect inspection apparatus can be displayed on the screen through the display unit.

The determination information includes the position (distribution), type, size, and / or number of the defect (d), and in the case of the position (distribution) of the defect (d), for example, Can be displayed on the display. The inspection method and display method of the defect (d) are not particularly limited, and they can be carried out by a conventional method, for example. As described above, the defect distribution map 30 of the fabric 10 is generated based on the determination information of the fabric. Generation of the defect distribution map 30 of the fabric 10 may be performed through a control unit constituting the cutting system.

In the accompanying drawings, "*" represents defect (d). The fabric 10 may have one or more of the above-mentioned defects (d), but in the drawings, the type of defects (d) is not taken into account and is denoted by "* ".

On the other hand, in this document, "cutting" can be used to mean one or more selected from among "slitting cutting" and "unit cutting ". In the present invention, the term "slitting cutting" means that the raw material 10 is cut into a strip-shaped semi-finished product by cutting the raw material 10 in the length direction Y, (Y) direction and the width (X) direction and cut into a unit product. At this time, in the present invention, the band-shaped semi-finished product obtained through the slitting cut is referred to as a 'strip', and the cut product obtained through the unit cut is referred to as a 'single product' or a 'unit product'.

The single piece is a single piece of finished product having a length and width smaller than the raw fabric 10, which may have the shape of, for example, a quadrangle. 2, the strips 11, 12 and 13 are band-shaped semi-finished products having a width smaller than that of the fabric 10, which can be cut into a single piece through a unit cut have. For reference, FIG. 2 shows a state in which the raw fabric 10 is slit-cut and divided into a first strip 11, a second strip 12 and a third strip 13.

In the present invention, the cutting method is not particularly limited. The cutting method may be such that the cloth 10 can be divided into at least one piece and / or strips 11, 12, 13. The cutting may be performed, for example, through a metal knife, a jet water knife and / or a light source, and the light source may be a laser beam or the like.

In this document, "area efficiency" means that the total area of the cut products obtained after cutting is calculated by dividing the total area of the cutting front fabric 10 by the total area. The area efficiency can be expressed as a percentage (%) as usual. At this time, the cut product is selected from the single product and / or the strips 11, 12 and 13. The total area of the cut products is calculated as the area of one cut product x the number of cut products produced.

In this document, the term "size" means at least one selected from the width, length, area, and diagonal length of the fabric 10 or the cut product (piece and / or strip).

In the present invention, "size" is used in the same meaning unless otherwise stated in the following embodiments. Further, "inch" representing the length may mean diagonal length as is well known. The inch may refer to a diagonal length, for example, when the product is a square single piece such as a polarizing plate.

Referring to FIG. 3, the fabric 10 may include a marking part 15. Specifically, the fabric 10 may be provided with one or more marking portions 15 that can distinguish between the left side and the right side. In this document, the marking unit 15 can be provided to be able to distinguish the direction of the fabric 10. The marking portion 15 is preferably provided so as to be able to distinguish at least the left and right sides of the fabric 10.

 The marking portion 15 may be formed along the length Y direction of the fabric 10 at at least one of the left end portion DS and the right end portion OS of the fabric 10. Here, each end portion OS (DS) means the edge of the fabric 10, which may mean a width within 2 cm from the left or right end of the fabric 10, for example. At this time, the width of the marking portion 15 is not limited. For example, the marking portion 15 may have a width of from 0.01 mm to 2 cm, from 0.02 mm to 1.5 cm, from 0.1 to 1 cm, or from 0.5 mm to 0.5 cm. In addition, the marking portion 15 may be formed continuously or discontinuously along the length (Y) direction of the fabric 10. 3 shows an embodiment in which the marking portions 15 are continuously formed in a straight line along the length (Y) direction of the fabric 10.

The marking unit 15 is not limited as long as it can be recognized by the naked eye and / or the identification device. The marking portion 15 may include at least one of a printing portion formed by printing, a notch portion formed by a thickness step, and a perforation formed by perforation, for example. For example, the printing unit may be provided by printing a color material. Further, the notch portion is not limited as long as it has a thickness step, and it can be selected from an osmosis treatment portion formed by pressurization, a half cutting portion formed by half cutting, and the like. Also, the perforations may be discontinuously formed.

The marking portion 15 may be formed before the defect 10 is inspected for defects or after defect inspection of the fabric 10 is performed. In one embodiment, the marking portion 15 may be formed after defect inspection of the fabric 10 is performed.

The marking portion 15 improves at least cutting productivity of the fabric 10. As mentioned above, the fabric 10 can be continuously changed between the left and right sides while repeating the unwinding and winding after the defect inspection is performed. At this time, the marking unit 15 can distinguish the direction of the fabric 10 even when the left and right sides are changed by repeating the unwinding and winding.

One fabric 10 is shown in Figures 1 and 2. The fabric 10 has a strip shape, for example, wound on a roll. The fabric 10 shown in Figs. 1 and 2 is in an unfolded form, showing a part of the overall length Y. Fig.

As described above, with respect to the fabric 10 having the longest width X, the slit cutting and the unit cutting may be progressed sequentially, which may be advantageous in the process than in the case of the unit cutting alone. 12 and 13 having a width smaller than the width X of the fabric 10 by slitting the fabric 10 in the direction of the length Y prior to the unit cutting, . Thereafter, each of the strips 11, 12, and 13 is cut into single pieces through a unit cut. In addition, each of the divided strips 11, 12, 13 may be cut into a single piece at the request of a consumer after being wound on a roll. At this time, the widths Wa and Wb of the respective strips 11, 12 and 13 may be equal to or larger than the size (width and / or length) of the end product, that is,

5 is a flowchart showing a production method of a cut product related to the first embodiment of the present invention.

The method of producing a cut product related to the first embodiment of the present invention includes the steps of calculating a defect distribution density along a width direction of a fabric based on defect information of a fabric and calculating a defect distribution density in a region where a widthwise defect distribution density is relatively large And determining a virtual cut line so that a unit product having a second size larger than the first size is allocated to a region where the widthwise defect distribution density is relatively small.

4 and 5, the method of producing a cut product according to the first embodiment of the present invention is characterized in that the defect distribution density 40, 50 along the direction of at least one of the longitudinal direction and the width direction of the fabric 10 (S101).

In addition, the production method of the cut product includes a step (S102) of determining a virtual cut line reflecting the size and position of the unit product to be cut based on the calculated defect distribution density (40, 50). Here, the virtual cutting line 20 means a cutting plan as described above, and the virtual cutting line may be an array of a plurality of strips or an array of a plurality of unit products. The virtual cut line 20 may also be an array of strips and unit products. The virtual cutting line 20 may mean a virtual cutting line for slitting cutting, a virtual cutting line for cutting the unit, or a virtual cutting line in which a slitting cutting and a unit cutting can be performed one after another, It can also mean a line. In addition, the step of determining the virtual cutting line (S102) may be referred to as the step of determining the size and the cutting position of the unit product.

In one embodiment, the virtual cut line 20 may be comprised of an array of a plurality of strips 11-13 having a predetermined width (e.g., WA). At this time, referring to FIG. 2, the widths of the respective strips 11 to 13 constituting the virtual cut line 20 may be set to be different from each other. Alternatively, the widths of the at least two strips 11 to 13 constituting the virtual cutting line 20 may be set equal to each other. At this time, the width of each of the strips 21 to 23 constituting the virtual cutting line 20 may be equal to the width or length of the unit product to be produced.

On the other hand, the defect distribution density 40 in the longitudinal direction of the fabric 10 can be calculated according to the number of defects d per unit length? Y. This longitudinal defect distribution density 40 can be created, stored and used in graphical or tabular form.

The defect distribution density in the width direction of the fabric 10 can be calculated according to the number of defects d per unit width DELTA x. This widthwise defect distribution density 50 can be created, stored and used in graphical or tabular form.

The production method of the cut product determines a position to divide the fabric 10 into two or more regions 10a and 10b along the longitudinal direction Y of the fabric 10 based on the longitudinal direction defect distribution density of the fabric Step < / RTI >

At this time, the virtual cut lines can be independently determined for each of the two or more divided regions 10a and 10b. That is, the fabric 10 can be divided into a plurality of regions along the longitudinal direction based on the defect distribution density 40 in the longitudinal direction, and an independent cutting plan can be established for each region. In one embodiment, based on the longitudinal defect distribution density 40 of the fabric, at least two regions having a large difference in defect distribution density can be divided. That is, when the fabric having a large difference in the defect distribution density 40 along the length direction is cut on the basis of a single virtual cut line, the productivity can be lowered.

A unit product having a first size is allocated to the region 10c having a relatively large defect distribution density 50 in the width direction and a region 10d or 10e having a relatively small defect distribution density 50 in the width direction is assigned to the virtual cut line. A unit product having a second size different from the first size may be allocated to the unit product. At this time, the first size may be smaller than the second size. Specifically, the arrangement of the unit products to be cut based on the widthwise defect distribution density 50 can be determined. A relatively small unit product is disposed in a region where the widthwise defect density distribution 50 is large and a relatively large unit product is disposed in a region where the widthwise defect density 50 is relatively small, . For example, referring to FIG. 3, since the density of the central region 10c is higher than that of the remaining regions 10d and 10e with respect to the width direction, And arranging the unit products of 47 inches or 55 inches in the remaining regions 10d and 10e, the overall yield is increased. That is, a region having a high defect density may mean a region where a gap between defects is relatively narrow, and a defect rate may be increased if a large unit product is disposed in such a region.

In summary, the virtual cut line 20 can be determined so that the yield rate of the virtual cut is maximized.

The virtual cutting line 20 can be determined so that the area efficiency becomes equal to or larger than a predetermined value at the time of cutting the cloth, and the virtual cutting line 20 can be determined from the plurality of virtual cutting lines having the same area efficiency at the time of cutting the cloth, The virtual cut line can be determined as the maximum virtual cut line.

6 is a flowchart showing a production method of a cut product related to the second embodiment of the present invention.

The production method of the cut product related to the second embodiment includes a step of generating a defect distribution map of the fabric by inspecting defects on the fabric and a defect distribution density along the length direction and the width direction of the fabric based on the defect distribution map of the fabric A unit product having a first size is allocated to an area having a relatively large defect distribution density in the width direction and a unit product having a first defect size is allocated to a region having a relatively small defect distribution density in the width direction, And determining a virtual cut line reflecting the size and position of the unit product to be cut so that the unit product having the second size larger than the size is allocated.

The production method of the cut product related to the second embodiment is based on the step S201 of generating the defect distribution map 30 of the fabric by checking the defect on the fabric 10 and the defect distribution map 30 of the fabric (S202) of calculating a defect distribution density (40, 50) along at least one of a longitudinal direction and a width direction of the fabric, and calculating a size of the unit product to be cut based on the calculated defect distribution density And determining a line (S203).

That is, the defect distribution density (40, 50) along at least one of the longitudinal direction and the width direction of the fabric can be calculated based on the defect distribution map 30 of the fabric. The remaining steps are the same as the steps described in the first embodiment, so a detailed description thereof will be omitted.

7 is a block diagram illustrating a production system 100 for a cut product in accordance with an embodiment of the present invention.

The production system 100 for a cut product according to an embodiment of the present invention calculates a defect distribution density along at least one of a longitudinal direction and a width direction of a fabric and calculates a defect distribution density based on the calculated defect distribution density, And a mode for determining a virtual cut line reflecting the size and position of the virtual cut line.

In addition, the production system 100 of the cut product related to another embodiment of the present invention may further include a defect inspection mode for generating a defect distribution map of the fabric by inspecting defects on the fabric, And a width direction, and determining a virtual cut line reflecting the size and position of the unit product to be cut based on the calculated defect distribution density.

Further, the production system 100 of the cut product related to another embodiment of the present invention calculates the defect distribution density along at least one of the length direction and the width direction of the fabric on the basis of the defect distribution map of the fabric, A unit product having a first size is allocated to an area having a relatively large width defect distribution density, and a second size larger than the first size is allocated to an area having a relatively small width defect distribution density And a mode for determining a virtual cutting line that reflects the size and position of the unit product to be cut so that the unit product having the unit product is allocated.

Referring to FIG. 7, a production system 100 of a cut product may include a good product calculating unit 500 and a cutting unit 300. The production system 100 of the cut product may include a product information input unit 110 and a far-end information input unit 120. In addition, the cutting system 100 may include a defect information storage unit 400.

The product information input unit 110 stores product information. At this time, the information of the product includes the size of each product. For example, when the cloth 10 is cut into n products, the sizes of the n products to be cut are input to the product information input unit 110. Here, n products (n? 2) are as described above. For example, when there are a plurality of strip products having the same size (area or inch) or different products as the product to be cut, the size of each strip product is input and stored in the product information input unit 110 .

The raw information of the raw fabric 10 is input to the raw fabric information input unit 120. In the far-end information input unit 120, the size of the raw material 10, for example, may be input as far-end information. More specifically, at least one selected from the width X and the length Y of the fabric 10 may be input to the fabric information input unit 120.

The defect information of the fabric 10 is stored in the defect information storage 400. The defect information may be, for example, the distribution (position) and / or the type of the defect (d) of the defect (d) present in the fabric 10. The defect information may be inspected by, for example, a defect inspection apparatus (not shown) and input to the defect information storage unit 400. [ In addition, the defect information may be displayed on an x-y coordinate through a monitor (not shown). The defect information storage unit 400 may store defect distribution maps 30 and defect distribution densities 40 and 50 along at least one of a longitudinal direction and a width direction of the fabric 10 .

The good product calculating unit 500 calculates the yield rate of the flat product based on the distribution of defects (d) stored in the defect information storage unit 400, that is, the area yield according to the distribution of defects (d). The good product calculating unit 500 calculates the quantity of the positive product according to the virtual cut line in consideration of the defect (d) distribution.

The cutting unit 300 can cut the fabric 10 along an imaginary cutting line that maximizes the area efficiency and the yield rate based on the result calculated by the good product calculating unit 500. [ The cutting unit 300 includes at least a cutting device. The above-described cutting device can be configured as usual, for example. The cutting device may include, for example, a supporting means for supporting the fabric 10 and a cutting means for cutting the fabric 10. The support means may comprise at least one selected from, for example, a conveying conveyor, a roll, and a support plate. The cutting means may have a structure including at least one selected from a metal knife, a jet water knife, a light source (laser beam irradiator, etc.), and the like. The cutting unit 300 may include a first cutting unit for obtaining a plurality of strips 11, 12, and 13 by slitting and cutting the raw material 10 in the longitudinal direction. In addition, the cutting unit 300 may include a second cutting unit for cutting the obtained strips 11, 12, 13 in the width direction to obtain a unit product.

The area efficiency calculation unit 200 calculates the area efficiency of the strips 11, 12, 13 and the strips 11, 12, 13, which maximize the area efficiency, . In one example, the area efficiency calculation unit 200 calculates the number of strips and the width of strips that maximize area efficiency based on the information of the product information input unit 110 and / or the far-end information input unit 120 .

Hereinafter, the relationship between the area efficiency and the production rate according to the determination of the virtual cut line will be described in detail with reference to the accompanying drawings.

8 is a plan view of a fabric for explaining a production method of a cut product related to a third embodiment of the present invention.

Referring to FIG. 8, a method of producing a cut product according to a third embodiment of the present invention includes a virtual cut line derivation step of deriving a plurality of virtual cut lines 20, 21 having the same area efficiency on a raw material 10 .

The method of producing a cut product may further include a virtual cut line determination step of determining a virtual cut line 30 that maximizes a positive rate among a plurality of derived virtual cut lines 20 and 21 based on defect information on the far end .

Referring to FIG. 8, each virtual cut line 20, 21 may be an array of a plurality of strips 11, 12, 13 having a predetermined width (e.g., WA). At this time, the widths of the strips 11, 12, and 13 constituting the virtual cutting line 20 can be set to be the same. Alternatively, the widths of the at least two strips 11, 12, 13 constituting the virtual cutting line 20 may be set to be different from each other. At this time, in the virtual cut line deriving step, the widths of the strips 11, 12, and 13 constituting the virtual cut line 20 may be the same as the width or length of the produced individual product. That is, the width of the strip may correspond to the width of the unit product, and may be arranged between strips having different widths depending on the defect distribution density of each region on the far end.

Further, in the virtual cut line derivation step, the widths of the respective virtual cut lines 20 and 21 may be determined to be smaller than the width X of the far end.

On the other hand, each imaginary cut line 20, 21 can be derived based on the number and width of the strips that maximize the area efficiency. When the number and the width of the strips that maximize the area efficiency described above are respectively determined, at least two virtual cut lines 20 and 21 composed of such strips can be derived. When the number of strips 11, 12, 13 forming the virtual cutting line 20 and the width of each strip 11, 12, 13 are determined, the total width XZ of the virtual cutting line 20 is determined . That is, when the virtual cutting line 20 is led out on the fabric 10, the cloth 10 is cut on the cloth 10 by the difference Z between the width X of the cloth and the width XZ of the entire strip of the virtual cut line In the widthwise direction of the sheet.

8, in the virtual cut line deriving step, the plurality of virtual cut lines 20 and 21 can be eccentrically centered on the respective virtual cut lines 20 and 21 along the width direction of the fabric 10 . At this time, the eccentricity interval may be determined to be a value equal to or less than the width (Z) of the width of the fabric and the width of the entire strip of the virtual cut line. At this time, based on the defect information of the fabric, the quantification rate of each virtual cut line 20, 21 can be calculated.

In addition, the defect information of the fabric 10 includes the distribution density of the defect (d) on the fabric 10 described above. The distribution density of defects d on the fabric 10 may include the distribution density of defects along the length direction of the fabric 10 and the distribution density of defects along the width direction of the fabric 10. [ At this time, depending on the distribution of the defects (d) on the fabric (10), the yield rate of each virtual cut line (20, 21) can be calculated differently. 8A may be about 96%, and the second virtual cut line 21 shown in FIG. 8B may be formed at a ratio of about 96% May be about 98%. Therefore, in the virtual cut line determination step, it is possible to determine the virtual cut line 21 that maximizes the quantization rate among the plurality of derived virtual cut lines 20, 21 based on the defect (d) information on the raw material 10 have.

In addition, the method of producing a cut product may include a cutting step of slitting the fabric 10 along a determined virtual cut line. With the above-described virtual cutting method, it is possible to determine an optimal virtual cutting line that maximizes the area yield and the yield.

9 is a plan view of a fabric for explaining a production method of a cut product related to the fourth embodiment of the present invention.

9, a method of manufacturing a cut product according to a fourth embodiment of the present invention includes the steps of cutting a fabric 10 into a plurality of strips 11, 12, 13, And a virtual cut line 20 deriving a virtual cut line 20 based on the number of strips and the width of the strip.

In addition, the production method of the cut product includes a yield rate calculation step of calculating the yield rate (area yield) of the derived virtual cut line on the basis of the defect information on the fabric 10.

The method of producing a cut product includes a virtual cut line positioning step of determining a position of a virtual cut line that maximizes a yield rate while moving the virtual cut line 20 along the width direction of the tail end 10. [

At this time, in the virtual trimming line positioning step, the moving distance of the virtual trimming line along the width direction of the fabric 10 can be determined to be equal to or smaller than the width of the fabric 10 and the width difference of the entire strip forming the virtual trimming line.

In addition, in the virtual cut line positioning step, the virtual cut line 20 can be positioned so as to be spaced apart from the edge of at least one of the left and right cloths by a predetermined distance with respect to the width direction of the cloth. The gap may be less than the width of the fabric and the width of the entire strip.

In summary, the method according to the third embodiment is a method for determining a virtual cut line in which a plurality of virtual cut lines having an area efficiency equal to or greater than a predetermined value are derived, and then the yield rate is maximized. In the method according to the fourth embodiment, after the virtual cut line that maximizes the area yield is derived, the derived virtual cut line is moved along the width direction of the fabric and the yield rate is calculated, It is a method of determining the position of the cutting line.

INDUSTRIAL APPLICABILITY As described above, according to the present invention, cutting can be performed so as to have the highest area yield in the slitting cutting. INDUSTRIAL APPLICABILITY The present invention can be usefully applied in, for example, technical fields such as various display industries, optical industries and film manufacturing industries.

The foregoing description of the preferred embodiments of the present invention has been presented for purposes of illustration and various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention, And additions should be considered as falling within the scope of the following claims.

10: Fabric
11, 12, 13: strip
20, 21: Virtual cut line
30: Defect distribution map
100: Production system of foundation products

Claims (15)

Calculating a defect distribution density along the width direction of the fabric based on defect information of the fabric; And
A unit product having a first size is allocated to a region where a widthwise defect distribution density is relatively large and a unit product having a second size larger than a first size is allocated to a region having a relatively small defect distribution density in a width direction, Determining a line,
The unit product is obtained by being cut in each of the longitudinal direction and the width direction of the fabric,
The virtual cutting line comprises an array of a plurality of unit products,
A method of producing a cut product in which a plurality of unit products are simultaneously obtained in a single cutting process in cutting a fabric. The method according to claim 1,
Wherein the defect distribution density in the width direction of the fabric is calculated according to the number of defects per unit width. The method according to claim 1,
Calculating a defect distribution density along the length direction of the fabric; And
Further comprising the step of determining a position to divide the fabric into two or more regions along the length direction of the fabric based on the longitudinal direction defect distribution density of the fabric. The method of claim 3,
A method of producing a cut product in which two or more divided regions are independently determined by virtual cut lines. The method of claim 3,
Wherein the defect distribution density in the longitudinal direction of the fabric is calculated according to the number of defects per unit length. The method according to claim 1,
Wherein the virtual cut line is determined so that the area efficiency at the time of cutting the fabric is equal to or greater than a predetermined value. The method according to claim 6,
Wherein the virtual cutting line is determined as an imaginary cutting line that maximizes the flatness rate among a plurality of virtual cutting lines having the same area efficiency at the time of cutting the cloth. Generating a defect distribution map of the fabric by inspecting defects on the fabric;
Calculating a defect distribution density along a length direction and a width direction of the fabric based on a defect distribution map of the fabric; And
A unit product having a first size is allocated to a region where a widthwise defect distribution density is relatively large based on a defect distribution density for each region on the far end, and a unit product having a first size is allocated to a region where a widthwise defect distribution density is relatively large. Determining a virtual cut line reflecting the size and position of the unit product to be cut so that a unit product having a size is allocated,
The unit product is obtained by being cut in each of the longitudinal direction and the width direction of the fabric,
The virtual cutting line comprises an array of a plurality of unit products,
A method of producing a cut product in which a plurality of unit products are simultaneously obtained in a single cutting process in cutting a fabric. 9. The method of claim 8,
Wherein the defect distribution density in the width direction of the fabric is calculated according to the number of defects per unit width. 9. The method of claim 8,
Further comprising the step of determining a position to divide the fabric into two or more regions along the length direction of the fabric based on the longitudinal direction defect distribution density of the fabric. 11. The method of claim 10,
A method of producing a cut product in which two or more divided regions are independently determined by virtual cut lines. 9. The method of claim 8,
Wherein the defect distribution density in the longitudinal direction of the fabric is calculated according to the number of defects per unit length. 9. The method of claim 8,
Wherein the virtual cut line is determined so that the area efficiency at the time of cutting the fabric is equal to or greater than a predetermined value. 14. The method of claim 13,
Wherein the virtual cutting line is determined as an imaginary cutting line that maximizes the flatness rate among a plurality of virtual cutting lines having the same area efficiency at the time of cutting the cloth. delete

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