发明名称 |
CONTROL OF FOAM CELL SIZE BY MEASURING REFLECTED LIGHT |
摘要 |
A method and apparatus are provided to continuously monitor and measure the average size of individual foam cells contained in a foam structure, such as polystyrene foam for example, as it is being fabricated. Such an arrangement permits the prompt adjustment of process conditions and/or the concentration of nucleating agents in the extrusion system in the event the foam cell size deviates from a preselected norm. The method comprises illuminating the surface of a foam sheet, receiving and collection at least a portion of the light which is diffused and reflected from the foam sheet with a detector photocell, electrically measuring the amount of light energy received by the photocell and converting such measurements into a cell size measurement. |
申请公布号 |
CA1065567(A) |
申请公布日期 |
1979.11.06 |
申请号 |
CA19750236656 |
申请日期 |
1975.09.29 |
申请人 |
MOBIL OIL CORPORATION |
发明人 |
COLOMBO, EDWARD A.;TSAI, JAMES T. |
分类号 |
B29C44/50;G01B11/02;G01N21/47;G01N21/88;G01N33/44 |
主分类号 |
B29C44/50 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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