JAPAN TAPPI JOURNAL
Online ISSN : 1881-1000
Print ISSN : 0022-815X
ISSN-L : 0022-815X
Volume 65, Issue 3
Displaying 1-16 of 16 articles from this issue
Process Control and Automation
  • Process Control and Automation Committee JAPAN TAPPI
    2011 Volume 65 Issue 3 Pages 210-215
    Published: 2011
    Released on J-STAGE: September 30, 2011
    JOURNAL FREE ACCESS
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  • Kenzo Fujii
    2011 Volume 65 Issue 3 Pages 222-226
    Published: 2011
    Released on J-STAGE: September 30, 2011
    JOURNAL FREE ACCESS
    This paper presents a useful technology of total PID tuning approach for a large scale plant. The proposed method has two stages. First stage is skill training to operator, and shared part of tuning. Second stage is tuned by engineers using performance based tuning. We were able to obtain actual plant stabilization in a short period by using this approach.
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  • Masamitsu Aoki
    2011 Volume 65 Issue 3 Pages 227-231
    Published: 2011
    Released on J-STAGE: September 30, 2011
    JOURNAL FREE ACCESS
    Specialty paper industry in the recent situation, in addition to rising raw material costs, to meet customer demand for small, little more respect, and the production of various kinds.
    So we have to do and how efficient production has become an important issue. Recently, real-time physical unit of product (cost) by the visibility, awareness raised the cost of manufacturing sites, efforts to optimize the operation conducted. In addition, we were able to confirm the improvement. This article explains about it.
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  • Takashi Sugawara, Noriyuki Kobayashi
    2011 Volume 65 Issue 3 Pages 232-236
    Published: 2011
    Released on J-STAGE: September 30, 2011
    JOURNAL FREE ACCESS
    Measuring the thickness of the web by using conventional caliper sensor has been achieved through the use of dual-side, contacting caliper sensors. Therefore, there has a problem of the flaw on the paper surface and sensor abrasion damage.
    On that occasion, paper makers have been asking for a new type of caliper measurement, which overcomes the weaknesses of contacting caliper. Most of the QCS makers have been using laser sensor to measure the thickness.However,Ishinomaki Mill introduces Yokogawa's non-contact (one side light-touch) caliper sensor which is based on a combination of two techniques chromatic aberration and confocal displacement.This one can expect the improvement to eliminate the problems of the flaw and marking on the paper,sensor contact abrasion and dirt deposit on the contact.
    This report presents the outline of introducing optical caliper sensor which we introduced into Ishinomaki mill N6.
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  • Seiji Hori
    2011 Volume 65 Issue 3 Pages 237-243
    Published: 2011
    Released on J-STAGE: September 30, 2011
    JOURNAL FREE ACCESS
    Today's manufacturing industry is expected to further reduce costs and improve production efficiency due to global competition and shortened product life cycles.
    To meet these needs, we have improved the performance and reliability of our new products.
    We would like to introduce our approach, using PLCs, to reduce the total cost of manufacturing.
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  • Hidenori Kiyoshi
    2011 Volume 65 Issue 3 Pages 244-250
    Published: 2011
    Released on J-STAGE: September 30, 2011
    JOURNAL FREE ACCESS
    In2006, the new safety management using IT (Information Technology) was commissioned by the Ministry of Health, Labor and Welfare, in cooperation with the National Institute of Occupational Safety and Health, Japan.
    This report presents the above new safety management and several examples of IT equipment introduced into the manufacturing industry.
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  • Michitaka Kawasaki
    2011 Volume 65 Issue 3 Pages 251-257
    Published: 2011
    Released on J-STAGE: September 30, 2011
    JOURNAL FREE ACCESS
    It passed for nearly 22years after introducing DCS into 2M/C and performd several times update from problems in the maintenance.
    The μXL system made in Yokogawa Electric Corp. which we introduced in 1996 stops an order in 2000 and maintenance becomes the end in 2010.
    From an aspect of the operation stability, we thought that correspondence of the trouble in late years was difficult and carried out update to CENTUM VP Small made in Yokogawa Electric Corp. at the time of a stop in a fall in thought October, 2009.
    Here, I report an update example of CENTUM VP Small which we introduced this time.
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  • Toshiyuki Nagao
    2011 Volume 65 Issue 3 Pages 258-261
    Published: 2011
    Released on J-STAGE: September 30, 2011
    JOURNAL FREE ACCESS
    In order to maintain an accurate fine pulp blend during the mixing process, the proper functioning of flow and consistency transmitters is essential. Apart from microwave measuring systems, standard on-line consistency transmitters generate their readings based on shear stress as registered on the mixing blades. This system yields a relative reading based on accepted, theoretical values-it does not provide a real-time, absolute measurement.
    This is an issue because, even under controlled laboratory conditions, consistency values will vary between samples despite shear stress sensors indicating identical consistency ratings. These meters can be affected by a host of variables, such as pulp materials, temperature, additives, particulate velocities within the pulp or of the pulp itself, turbulence, etc. Insuring the proper operation of these sensors and their maintenance are critical issues in pulp quality control.
    In this paper, we detail how we have re-engineered the calibration process to produce consistent readings from our resistance sensors. Additionally, we discuss some unexpected phenomenon that was observed during the calibration and which may merit additional investigation.
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  • Hiroshi Ota, Takashi Ueno
    2011 Volume 65 Issue 3 Pages 262-268
    Published: 2011
    Released on J-STAGE: September 30, 2011
    JOURNAL FREE ACCESS
    Electrical and instrumentation control systems have become essential for the operation of all equipment in the field of manufacturing industry. Specification and application of electrical and instrumentation control systems are different. This paper introduces the capability of system unification utilizing unified controllers nv series.
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  • Kunio Yamamoto
    2011 Volume 65 Issue 3 Pages 269-273
    Published: 2011
    Released on J-STAGE: September 30, 2011
    JOURNAL FREE ACCESS
    An high quality film is a material used in the market such as the liquid crystal, semiconductors, and the batteries. In the film material industries such as the liquid crystal, semiconductors, and the batteries, a lot of film materials are manufactured to correspond to the diversification of needs and the product-short life cycle.
    The company's that manufactures the performance film being able to respond to speedy development, the improvement of the quality, and the customer demand such as reduction in costs becomes a very important factor. In each enterprise under the environment,the company are improving promptly quality and lead time in the film manufacturing process. The problem and the solution of this environment are described in this report.
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  • Masanori Okimoto
    2011 Volume 65 Issue 3 Pages 274-278
    Published: 2011
    Released on J-STAGE: September 30, 2011
    JOURNAL FREE ACCESS
    Necessary time of difficult steers of a decrease in construction according to a decrease in capital investment and a severe cost reduction demand, etc. aiming at the economic shrinkage period in the future is faced though the instrumentation work and meter maintenance industry grow up riding on the wave of economic development, get over time when Japanese economy is saturated, and came.
    In this report, the idea is described as charge of the technology in the experience, the instrumentation maintenance of the instrumentation charge in the petrochemical facility, and the construction company and the health and safeties about a current problem as the construction company and the approach in the future, etc. based on the experience.
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Topics & Information
Research Report (Original Paper)
  • Masanori Kawashima, Douglas Bousfield
    2011 Volume 65 Issue 3 Pages 284-293
    Published: 2011
    Released on J-STAGE: September 30, 2011
    JOURNAL FREE ACCESS
    The development of print gloss is reported for the first time using actual printing inks, coatings and press blanket materials. The print gloss for several blanket textures is measured and the results show that the surface structure of the blanket material has a significant influence on print gloss development. Higher blanlet roughness correlates with low gloss. A model, based on the surface tension driven leveling of an ink filament, is proposed to predict the print gloss right after printing. This model predicts the correct gloss dynamics and gives insight into the length scale related to the blanket texture. Ink tack on the press blanket texture is also measured by a rolling nip device, which detects the separation forces at the nip exit. The influence of blanket type on the maximum and minimum pressures is reported. Rough blanket textures are found to correlate with smaller tack forces. The reduction of tack force with increase blanket texture is thought to be related to the earlier onset of cavitation at the nip exit.
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Pulp and Paper Mills in Japan (22)
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