品質工学
Online ISSN : 2189-9320
Print ISSN : 2189-633X
ISSN-L : 2189-633X
2 巻, 6 号
選択された号の論文の4件中1~4を表示しています
論説
開発と研究
  • 白地 健, 小野 元久, 土倉 克彦, 矢野 宏
    1994 年 2 巻 6 号 p. 18-25
    発行日: 1994/12/01
    公開日: 2016/03/24
    ジャーナル フリー
    In the strength test of polymer materials by the flexual test, evaluation was made using the SN ratio with load andspecimen thickness as the input signals. Traditionally, the quality of such materials kes been evaluated mast of the time by the strength at break. ln this study, SN ratios were odtained from the load/displacement, curves after defining the elastic and plastic deformation domiains. The optimum conditions were obtained from a molding experiment using molding conditions as control factors. lt was clarified that the results of verificaton experiments varied depending on how the SN ratio was obtained. Based on the abobe result, conclusion was made that it is quite adequate to use the SN ratios from the load/displacement curves which is proposed by quality engineering.
  • ―外観選別から基本機能評価へ―
    深澤 宏
    1994 年 2 巻 6 号 p. 26-32
    発行日: 1994/12/01
    公開日: 2016/03/24
    ジャーナル フリー
    In this paper, the optimization on the generic function of a lipstick manufacturing process is discussed. Traditionally, the quality of lipsticks is measured by objective quality characteristics such as appearance. Sensory tests, which are not recommended in quality engineering, had been used to evaluate such quality characteristics. lt is because these quality characteristics are not stable due to the changes of environ mental conditions such as between lot variability or seasonal variation. When sucs quality problems occur, manufacturing conditions were adjusted from time to time,which is known as fire fighting or "mole beating" in Japanese. Among those objective quality characteristics, the ones such as scratches, color uniformity or breaking during usage are manu facturing related quality. As the generic function, the stress/strain relationship was investigated and the results showed that the relationship has satisfied the Hooke's Law with a good improvement.
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