Journal of Korea Technical Association of The Pulp and Paper Industry (펄프종이기술)

Korea Technical Association of the Pulp and Paper Industry (한국펄프종이공학회)
권호 표지

Development of Defects Detecting System for Corrugated Board, Mill Application, and Changes of Production Defects Ratio

골판지 불량 검색 시스템 개발, 현장적용과 생산 불량률 변화

  • Jeong, Jin-Mo (School of Forest Resources and Rural Engineering, College of Agriculture, Life & Environment Sciences, Chungbuk National University) ;
  • Min, Kyung-Eun (School of Forest Resources and Rural Engineering, College of Agriculture, Life & Environment Sciences, Chungbuk National University) ;
  • Kim, Mun-Sung (School of Forest Resources and Rural Engineering, College of Agriculture, Life & Environment Sciences, Chungbuk National University) ;
  • Park, Jong-Moon (School of Forest Resources and Rural Engineering, College of Agriculture, Life & Environment Sciences, Chungbuk National University)
  • 정진모 (충북대학교 농업생명환경대학 산림과학.지역건설공학부) ;
  • 민경은 (충북대학교 농업생명환경대학 산림과학.지역건설공학부) ;
  • 김문성 (충북대학교 농업생명환경대학 산림과학.지역건설공학부) ;
  • 박종문 (충북대학교 농업생명환경대학 산림과학.지역건설공학부)
  • Published : 2008.06.30
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Abstract

Defects of corrugated board were limiting factors to the corrugated industry's growth. On-line detecting systems of defects are beneficial to increase profits of the corrugated board companies by reducing base paper consumption, increasing process reliability, and increasing productivity. By replacing naked eye inspection of defects to a defects detecting system, continuous inspection without fatigue may guarantee final products quality. The system was developed, which was consisted of line scan CCD camera, lens, illuminating parts, high speed image processor, software, various input parts, and output parts. First installation location of the system was at before fluting process after base paper unwinding, and surface of liner board was inspected by the system. Second installation location was after fluting process and combining process for liner board. Production loss includes ragged appearance of edge, irregular flute shape, wrong combination of flute, score cracking, defects in base paper, and flute cracking. The production loss was analyzed before and after the system installation at a commercial domestic mill. The production loss ratio was defined as a production loss weight per total production weight. The production loss ratio before the installation was decreased a lot from 1.28%(during 3 months before installation) to 0.76%(during 12 months after the first installation) and to 0.25%(during 6 months after the second installation).

Keywords

References

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