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Volume 4 (1996)
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Volume 4, Issue 1
Displaying 1-5 of 5 articles from this issue
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The case of a long-term predictionGenichi Taguchi1996 Volume 4 Issue 1 Pages 2-6
Published: February 01, 1996
Released on J-STAGE: December 24, 2016
JOURNAL FREE ACCESSQuality Engineering is not the methods to solve a real problem, in this article a long-term forcasting, but it is the methods to evaluate the error variance of prediction from available sources of informations. The most difficult part of a longterm-prediction is to define Mahalanobis space. When we define the space of all normal years for some prediction such as total rain falls during summer time, it is possible to predictonly whether it would be normal or unusual but impossible to predict under or upper than normal.
Those problems are explained in this article with a new method.
View full abstractDownload PDF (1243K)
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Kenichi Shinohara, Teisuke Bushimata1996 Volume 4 Issue 1 Pages 25-30
Published: February 01, 1996
Released on J-STAGE: March 24, 2016
JOURNAL FREE ACCESSIn this paper, various methods to evaluate the friction function of plastic materials were discussed and the following equation was concluded to be the best for evaluation: y=βM* where y is the friction force, β is a constant and M* is the load. A reciprocating friction tester was designed and developed to optimize the evaluation method. Using the above function and the device, a low friction and low wear polyacetal resin was developed using an L18 orthogonal array in the experiment. After optimization, about 6 decibel gain on friction was obtained without affecting friction property. ln the life test, a gear from the new material showed a 50% durability improvement over current commercial products.View full abstractDownload PDF (1451K) -
Tomoharu Nishikawa, Hiroshi shibano, Kouichi Takenaka, Hideaki Yasunag ...1996 Volume 4 Issue 1 Pages 31-37
Published: February 01, 1996
Released on J-STAGE: March 24, 2016
JOURNAL FREE ACCESSIn the manufacturing of dry developers for copy machines and printers,lt is important that colorants and charge control agents are homogeneously dispersed and strongly bound together with binding resins. Traditionally,these properties have been evaluated either by the quality of the finished products or by the quality characteristics of the copied image,although the properties are heavily related to the operating conditions in the earlier manufacturing stages,namely,the material mixing process and the kneading process. In this report,the relation between stress and strain was measured from samples prepared after mixing and kneading processes to evaluate the dispersion and binding force of materials. As a result,we have successfully developed the manufacturing technology improved the product quality.View full abstractDownload PDF (1412K) -
Takeshi Nojima, Minoru Koizumi, Hiromi Satou1996 Volume 4 Issue 1 Pages 38-45
Published: February 01, 1996
Released on J-STAGE: March 24, 2016
JOURNAL FREE ACCESSThere are four sub-systems in the digital printer. These sub-systems have the following functions: 1. Optical scanning of a document, and conversion of the data to electric signals. 2. Supplying power to heating elements. 3. Formation of images on a thermo-plastic resin film by puncturing using heat. 4. Supplying ink to the punched portions to form images. This paper shows the application of Quality Engineering on the optimization of ink prescription for the fourth module of digital printer. ln the fourth module, the pattern on the stencil paper for platemaking is transcribed to an image pattern. Such results were analyzed and then evaluated.View full abstractDownload PDF (1873K) -
Kouya Yano, Hironori Kitazaki, Makoto Fukadzu, Toshitake Tamura1996 Volume 4 Issue 1 Pages 46-53
Published: February 01, 1996
Released on J-STAGE: March 24, 2016
JOURNAL FREE ACCESSUrea adducting is a method to separate oils from their mixture. In some cases,the separation conducted in the laboratory scale is not quite efficient. Parameter design was applied to optimeize the separation process using S/N ratio of omega transformation. The experiment was conducted to apply the Quality Engineering on the education program in the University. From the experiment, the separation efficiency was improved and it was conducted that this is a good practice for the students to understand the concept of Urea adducting.View full abstractDownload PDF (1912K)
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