KR20170098387A - Paper defect selecting system using photo sensor and position datd - Google Patents

Paper defect selecting system using photo sensor and position datd Download PDF

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Publication number
KR20170098387A
KR20170098387A KR1020160020003A KR20160020003A KR20170098387A KR 20170098387 A KR20170098387 A KR 20170098387A KR 1020160020003 A KR1020160020003 A KR 1020160020003A KR 20160020003 A KR20160020003 A KR 20160020003A KR 20170098387 A KR20170098387 A KR 20170098387A
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KR
South Korea
Prior art keywords
paper
defective
control module
sheet
point
Prior art date
Application number
KR1020160020003A
Other languages
Korean (ko)
Inventor
홍순도
임지원
김서영
샤빙
안우현
Original Assignee
부산대학교 산학협력단
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 부산대학교 산학협력단 filed Critical 부산대학교 산학협력단
Priority to KR1020160020003A priority Critical patent/KR20170098387A/en
Publication of KR20170098387A publication Critical patent/KR20170098387A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H43/00—Use of control, checking, or safety devices, e.g. automatic devices comprising an element for sensing a variable
    • B65H43/04—Use of control, checking, or safety devices, e.g. automatic devices comprising an element for sensing a variable detecting, or responding to, presence of faulty articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H26/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms
    • B65H26/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms responsive to presence of irregularities in running webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H43/00—Use of control, checking, or safety devices, e.g. automatic devices comprising an element for sensing a variable
    • B65H43/08—Photoelectric devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/54—Auxiliary process performed during handling process for managing processing of handled material
    • B65H2301/541—Counting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/54—Auxiliary process performed during handling process for managing processing of handled material
    • B65H2301/543—Auxiliary process performed during handling process for managing processing of handled material processing waste material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/50—Occurence
    • B65H2511/52—Defective operating conditions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2553/00—Sensing or detecting means
    • B65H2553/40—Sensing or detecting means using optical, e.g. photographic, elements
    • B65H2553/41—Photoelectric detectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2557/00—Means for control not provided for in groups B65H2551/00 - B65H2555/00
    • B65H2557/30—Control systems architecture or components, e.g. electronic or pneumatic modules; Details thereof
    • B65H2557/35—Control systems architecture or components, e.g. electronic or pneumatic modules; Details thereof for timing
    • B65H2557/352—Clocks; Timers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2557/00—Means for control not provided for in groups B65H2551/00 - B65H2555/00
    • B65H2557/50—Use of particular electromagnetic waves, e.g. light, radiowaves or microwaves
    • B65H2557/512—Use of particular electromagnetic waves, e.g. light, radiowaves or microwaves infrared
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2601/00—Problem to be solved or advantage achieved
    • B65H2601/50—Diminishing, minimizing or reducing
    • B65H2601/51—Diminishing, minimizing or reducing entities relating to handled material
    • B65H2601/511—Waste of handled material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/84—Paper-making machines

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  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

The present invention installs a defect discriminator having an optical sensor arranged on a frame surrounding entire paper on a position where the paper passes in a drying process step after initial paper production, uses a point of the paper as a reference point to input position information for a point determined to be a defect by the optical sensor in accordance with a transport speed of the paper into a control module, and calculates which cut sheet includes a defect in a cutting process of cutting dried paper at regular intervals by the control module to push a sheet including a defect to remove the defective sheet by a corresponding sheet transport means. In order to remove the defective sheet, a pusher capable of pushing a single sheet on a path where individual cut sheets moved in a roll-to-roll manner are arranged on a conveyor belt with a small gap to be transported and a paper detection sensor with a counter are arranged on an almost identical position to operate the pusher when the corresponding sheet is counted on a defective sheet turn informed by the control module to push the defective sheet to remove the defective sheet from the transport path. The defective sheet is recycled for pulp paper.

Description

TECHNICAL FIELD [0001] The present invention relates to a papermaking detection system using a photosensor and position information,

The present invention relates to a device for detecting defective paper produced in a paper mill and a method of operating the same.

The paper produced in the paper mill is made into papermaking after the raw material is blended, then rolled into a large roller after drying, then stretched again, cut and collected by a cutter, and is subjected to several cutting processes, Of paper. The thickness of the paper should be uniform in the papermaking process, and if it is pitted, it is treated as bad. A device such as a line line scan camera has been proposed as a device for selecting defects in an existing paper factory. Based on the fact that defects such as fingerprints occur mainly at the edge of paper edge, a line scan camera or optical sensor is installed to scan both ends of the paper in the paper passing path during the paper drying process to detect the edge condition and find the defect .

However, the bad state of the paper does not occur only on both ends of the paper. If we have a system that inspects the entire paper for defects, it will be a more reliable papermaking process.

Korean Registration No. 10-0775399 describes a technique of collecting paper manufactured in a paper mill and identifying defects using light in a stacked bundle state to treat defective bundles themselves. In such a case, there is room for improvement in that the defective-treated paper is recycled to a high-grade paper as a pulp raw material, but the production cost is reduced to zero.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a papermaking failure judgment system capable of discriminating the occurrence of defects with respect to the entire surface of a paper produced in a papermaking process and eliminating defects at an early stage of the process,

According to the above-mentioned object, according to the present invention, there is provided a failure discriminator in which a photosensor is arranged in a frame surrounding a whole paper in a path where paper passes in a drying process step after producing paper, Then, the control module inputs the position information of the point determined to be defective in the optical sensor, and calculates how many defects are contained in the cutting edge in the cutting process of cutting the dried paper at regular intervals by the control module, The defective paper was removed by pushing the defective paper from the conveying means.

In order to remove the defective recoil, a cutter and a cut sheet of cut paper are arranged on the conveyor belt at a slight interval and conveyed by a push rollers The paper detection sensor having a counter at the position is disposed, and when the defective amount notified by the control module is counted to the corresponding cutting edge, the pusher is operated and the defective edge is pushed and removed from the conveying path. Defective cuts are recycled to pulp.

The failure discriminator detects the amount of light transmitted from the paper passing through a plurality of light emitting elements on one side of the frame and on the opposite side so as to fill the light receiving elements by the paper width, The operation time is continuously counted and the time at which the failure is detected is recorded and transmitted to the control module.

The control module calculates the position of the defective portion from the reference point by the information on the feeding speed of the paper, the time at which the defects are detected, the reference point of the paper, and the time at which the reference point passes through the defective discriminator, From the paper width value, it is calculated how many leaf papers containing defects are located.

In addition, in the above, the paper sensor having the counter for detecting the defective paper on the conveying path is an optical sensor including an infrared sensor or a light emitting element and a light receiving element, counts the number of paper sheets every time the infrared ray radiated by the paper edge is sensed, And the pusher is operated.

According to the present invention, it is possible to increase the reliability of the paper detection system compared to the conventional failure detection system by inspecting the front side of the paper through the optical sensor during the papermaking drying process in the paper making plant, , And the amount of paper recycled to highland can be reduced, thereby improving productivity.

1 is a conventional paper defect detection apparatus.
2 is a photograph of a paper detection sensor having a configuration of a paper failure detector according to the present invention and a counter for detecting a defective paper edge.
FIG. 3 is a diagram for explaining that the paper length L and the defective point X can be calculated using the paper conveying speed V. FIG.
4 is a view showing a cross-sectional shape of a pusher for removing a defective paper according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 shows a structure of a paper failure discriminator according to the present invention. It is used to detect the defects of paper in the process of drying grass, and it is in the form of a frame, so that the paper passes through the frame as a gate and detects whether or not the entire surface of the paper is defective.

Whether the paper is defective is as follows. If the paper thickness is out of the standard value, it is too thin or thick, there is a hole in the paper, a torn part (mainly at both ends), a foreign matter is attached. In the case of such a defect, when the light is transmitted, the degree of reflection / transmission differs, so that the amount of current in the light receiving element deviates much from the reference value, and thus it can be judged to be defective.

A light emitting element is arranged at one end of the frame and a light receiving element is arranged at the opposite end thereof to discriminate such a defect.

It is possible to carry out the whole water irradiation instead of the specimen irradiation by making it pass through the frame type defective discriminating device of the present invention during the process of drying it by making it with paper having the form mixed with the raw material and drying it first and then winding it on the roller.

The control module counts the time counted from the point of time when the reference point is passed through the defective discrimination device and records the time determined as defective to the control module of the apparatus for drying and conveying the paper. From the velocity V and the defective determination time, a position determined as defective from the reference point is selected and recorded. When the length of the entire dried paper is L, the defective point X can be calculated from the reference point (see FIG. 3). Such defective position data can be used to determine how many defects are included in the reconditioning process in the cutting process of cutting paper to a certain size. The control module can find the number n of occurrences in the conveying conveyor where the trimming paper containing the defects is found from the re-width and the n (n = 1, 2, 3 ...) defective position X n . Accordingly, a pusher is installed to remove the defective waste paper by selecting a suitable point of the conveyor to which the waste paper is fed, and a count sensor for counting the number of the refuse is disposed to remove the defective waste paper. If the optical sensor or the infrared sensor is installed, the number of re-juxtaposition is counted by sensing when the re-jig is displayed, and when the number of re-juxtapositions corresponding to the defective re-juxtaposition provided by the control module is counted, the pusher control module is operated, Push the conveyor in the direction across it and place it in the collection box. The pusher may have a bar about the same length as the re-width, and the bottom of the bar may be configured to have a thin blade to push the reel (see FIG. 4). The pusher may be modified so as to perform a turnover operation.

Specific examples are as follows.

Assuming that the dry paper conveying speed is 0.1m / sec and the total length of the dry paper is L = 10m, if a failure is detected at 11 seconds and 70 seconds after the on state of the frame type bad discriminator, 1.1, and X2 = 7 are recorded. If the width is 1 m, the count sensor stores the ninth, third, and fourth defective recurring times. Then, the pusher is operated at the corresponding times to remove the three sheets do. If each re-entrant boundary is defective, the adjacent two are removed, and when winding on the roller, the reference point should be wound inward and counted inversely when counting occurrences.

The foundation is then collected and packaged several times as needed after the cutting process.

According to the present invention, since the defects are almost completely removed in the initial cutting process in the initial drying process, the defective paper detection system can significantly reduce the defective rate and thereby reduce the cost.

It is to be understood that the invention is not limited to the disclosed embodiment, but is capable of many modifications and variations within the scope of the appended claims. It is self-evident.

Claims (5)

A failure detection system for detecting and removing paper defects produced in a paper factory,
A bad discriminator in which a photosensor is arranged in a frame that can surround the entire paper in a path where the paper passes in the drying process step after the production of grass;
The position information of a point determined to be defective by the defective discriminator is calculated according to the feeding speed of the paper at one point of the paper as a reference point,
Calculating a number of defects appearing on the conveying means in the re-juxtaposition appearing at the re-juxtaposition in the cutting step of cutting the dried paper at regular intervals,
A control module for providing defective re-circulation information to the paper detection sensor disposed in the conveying path of the re-conveying means so as to remove the defective paper sheet by pushing the paper sheet including the defective in the re-conveying means;
The control unit counts the number of occurrences each time the cut paper appears in the conveying means, and if it is determined that the defective paper is the only occurrence count, the paper detection sensor; And
And a pusher for pushing or turning over a defective paper stock according to an instruction of the paper sensor and removing the defective paper stock from the conveyance path. A failure detection system for detecting and removing paper defects produced in a paper factory,
A bad discriminator in which a photosensor is arranged in a frame that can surround the entire paper in a path where the paper passes in the drying process step after the production of grass;
The position information of a point determined to be defective by the defective discriminator is calculated according to the feeding speed of the paper at one point of the paper as a reference point,
Calculating a number of defects appearing on the conveying means in the re-juxtaposition appearing at the re-juxtaposition in the cutting step of cutting the dried paper at regular intervals,
Providing a paper detection sensor disposed in a conveyance path of the conveying means again to control the operation of the pusher so as to remove the defective paper sheet by pushing the paper sheet containing the defective paper in the re- A control module;
A paper detection sensor which receives the defect occurrence count information from the control module, counts the number of occurrences each time the cut paper appears in the transfer means, detects the occurrence count of defective re-occurrences, and transmits the count to the control module; And
And a pusher for pushing a defective paper stock according to an instruction of the control module that has received the defective restoration time information of the paper sensor. 3. The apparatus according to claim 1 or 2, wherein the failure discriminator comprises a light emitting element at one end of the frame and a light receiving element at an opposite end opposite to the light emitting element,
The control module records the time at which the failure is detected by providing a timer capable of measuring the time, and the control module obtains the position information about how far the failure point is from the reference point from the paper feed speed and the failure detection time Wherein the detection unit detects the paper failure. The paper badness detection system according to claim 1 or 2, wherein the paper detection sensor comprises an infrared sensor or an optical sensor for counting the occurrence of re-occurrence. 4. The paper badness detection system according to claim 3, wherein the control module calculates the number of the paper sheets with defects from the paper width value according to the cutting to be performed in the cutting step.


KR1020160020003A 2016-02-19 2016-02-19 Paper defect selecting system using photo sensor and position datd KR20170098387A (en)

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KR1020160020003A KR20170098387A (en) 2016-02-19 2016-02-19 Paper defect selecting system using photo sensor and position datd

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KR1020160020003A KR20170098387A (en) 2016-02-19 2016-02-19 Paper defect selecting system using photo sensor and position datd

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