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11 条记录 (耗时 0.009 秒)

    Method and apparatus for controlling the gas content of foam materials
    7.
    发明公开
    Method and apparatus for controlling the gas content of foam materials 失效
    控制泡沫材料气体含量的方法和装置

    公开(公告)号：EP0428873A3

    公开(公告)日：1992-10-07

    申请号：EP90120168.1

    申请日：1990-10-20

    申请人： NORDSON CORPORATION

    发明人： Rucki, William Mark ,  Leidy, Jeanne Marie

    IPC分类号： G05D11/13 ,  B29B7/72

    CPC分类号： B29B7/72 ,  G05D11/132 ,  Y10S261/26

    摘要： A foam material dispensing system is provided with a control (20) which measures the amount of high viscosity liquid material delivered to a mixer (24), determines the amount of pressurized gas required to be injected into the mixer in order to produce a foamable material with a desired gas concentration, measures the amount of gas actually delivered to the mixer, and generates a cumulative error signal representing the difference between the amount of gas and the gas actually delivered. A control signal is generated to regulate the flow of gas to the mixer in relation to the magnitude of the error signal. A digital flow meter generates a pulse for each incremental amount of liquid material delivered to the mixer during an interval of time. During each successive interval, the pulses are counted and the count is multiplied by a preset gas-to-material ratio, from which the measured gas flow is subtracted and the difference added to the cumulatie error term. The error term is combined with a term proportional to the amount of liquid material delivered over a predetermined number of successive time intervals to produce the control signal.

    Method and apparatus for controlling the gas content of foam materials
    8.
    发明公开
    Method and apparatus for controlling the gas content of foam materials 失效
    在einem Schaummaterial中的Verfahren und Apparat zum Regulieren des Gasgehaltes。

    公开(公告)号：EP0428873A2

    公开(公告)日：1991-05-29

    申请号：EP90120168.1

    申请日：1990-10-20

    申请人： NORDSON CORPORATION

    发明人： Rucki, William Mark ,  Leidy, Jeanne Marie

    IPC分类号： G05D11/13 ,  B29B7/72

    CPC分类号： B29B7/72 ,  G05D11/132 ,  Y10S261/26

    摘要： A foam material dispensing system is provided with a control (20) which measures the amount of high viscosity liquid material delivered to a mixer (24), determines the amount of pressurized gas required to be injected into the mixer in order to produce a foamable material with a desired gas concentration, measures the amount of gas actually delivered to the mixer, and generates a cumulative error signal representing the difference between the amount of gas and the gas actually delivered. A control signal is generated to regulate the flow of gas to the mixer in relation to the magnitude of the error signal. A digital flow meter generates a pulse for each incremental amount of liquid material delivered to the mixer during an interval of time. During each successive interval, the pulses are counted and the count is multiplied by a preset gas-to-material ratio, from which the measured gas flow is subtracted and the difference added to the cumulatie error term. The error term is combined with a term proportional to the amount of liquid material delivered over a predetermined number of successive time intervals to produce the control signal.

    摘要翻译： 泡沫材料分配系统设置有测量输送到混合器的高粘度液体材料的量的控制器，确定要注入混合器中的加压气体的量以产生具有所需气体浓度的可发泡材料， 测量实际输送到混合器的气体量，并产生表示气体和实际输送气体之间的差的累积误差信号。 生成控制信号以相对于误差信号的大小调节到混合器的气体流量。 数字流量计在一段时间内为每个递送到混合器的液体材料量增加一个脉冲。 在每个连续的间隔期间，对脉冲进行计数，并将计数乘以预设的气体 - 物质比，从中减去测量的气体流量，并将差值加到累积误差项。 误差项与与预定数量的连续时间间隔输送的液体材料量成比例的项目组合以产生控制信号。