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93 条记录 (耗时 0.013 秒)

    Controlled degradation or cracking of alpha-olefin polymers
    91.
    发明授权
    Controlled degradation or cracking of alpha-olefin polymers 失效
    可控降解或开裂α-烯烃聚合物

    公开(公告)号：US4578430A

    公开(公告)日：1986-03-25

    申请号：US683748

    申请日：1984-12-19

    申请人： Sol Davison

    发明人： Sol Davison

    IPC分类号： C08F8/00 ,  C08F2/38 ,  C08F8/50 ,  C08J7/12

    CPC分类号： C08F8/50 ,  B29C2947/92704 ,  B29C2947/92857 ,  B29C47/0004 ,  B29K2023/14 ,  B29K2029/00 ,  B29K2105/0002 ,  C08F2810/10

    摘要： An improved process for the controlled reduction of average molecular weight and alteration of molecular weight distribution of C.sub.3 -C.sub.8 alpha-monoolefin homopolymers or copolymers comprises adding a peroxide continuously at a programmed cyclic rate to the polymer or copolymer and heating the mixture in a melt extruder. The rate of peroxide addition is varied at a frequency with a period longer than the decomposition time of the peroxide but shorter than the passage time of the mixture through the extruder, so as to achieve combinations of melt flow and molecular weight distribution for the polymer not possible with prior art steady rates of addition.

    摘要翻译： 用于控制降低平均分子量和改变C3-C8α-单烯烃均聚物或共聚物的分子量分布的改进方法包括以规定的循环速率连续向聚合物或共聚物中加入过氧化物，并在熔体挤出机中加热混合物 。 过氧化物添加的速率以比过氧化物的分解时间长的时间频率变化，但比混合物通过挤出机的通过时间短，从而实现聚合物的熔体流动和分子量分布的组合，而不是 可能与现有技术稳定的添加率。

    Extrusion drive control system
    92.
    发明授权
    Extrusion drive control system 失效
    挤出驱动控制系统

    公开(公告)号：US4437046A

    公开(公告)日：1984-03-13

    申请号：US389937

    申请日：1982-06-18

    申请人： Louie M. Faillace

    发明人： Louie M. Faillace

    IPC分类号： B29C47/08 ,  B29C47/92 ,  B30B11/00 ,  G05D13/66 ,  H02P5/50 ,  G05B19/24

    CPC分类号： G05D13/66 ,  B29C47/0801 ,  B29C47/92 ,  B30B11/005 ,  H02P5/51 ,  B29C2947/92209 ,  B29C2947/92361 ,  B29C2947/9259 ,  B29C2947/926 ,  B29C2947/92704 ,  B29C2947/92857 ,  B29C2947/92876 ,  B29C2947/92952 ,  B29C2947/9298 ,  B29C47/0014

    摘要： An extrusion drive control system for control of extrusion process machinery driven elements. A drive interface unit is adapted for use with any of a variety of drive motors and regulators. The interface unit accepts analog condition information signals from the drive motor and regulator, having any of a plurality of predetermined input characteristics, and provides corresponding digital signals having characteristics that are invariant with respect to the particular input characteristics. The interface unit has a communication channel for receiving digital control signals and for outputting digital signals indicating drive operating conditions. The low power digital circuitry and communications channel are protected from the high voltage and high power connections to the drive and drive regulator.Extrusion control means comprises the interface unit together with a drive control module, which permits input of control signals including speed set and ratio set, and permits display of at least one of the operating conditions. The drive control module has an internal data bus and a communications channel connected to the data bus and to the interface unit communications channel.For the control of an extrusion line process, having a plurality of driven elements which have related desired operating speeds, a control system comprises a similar plurality of extrusion control means, all connected to a controller, together with another drive control module for the input of a line speed setting. The controller responds to the input line speed setting and the operating conditions of the driven elements to output appropriate digital control signals to the driven elements to control them to operate at the desired related speeds. The interface unit outputs appropriate analog control signals to the drive units.

    摘要翻译： 一种用于控制挤压过程机械驱动元件的挤出驱动控制系统。 驱动器接口单元适于与各种驱动马达和调节器中的任何一个一起使用。 接口单元接受来自驱动电机和调节器的模拟条件信息信号，其具有多个预定输入特性中的任何一个，并提供具有相对于特定输入特性不变的特征的相应数字信号。 接口单元具有用于接收数字控制信号并输出​​指示驱动器操作条件的数字信号的通信通道。 低功率数字电路和通信通道可以保护高压和高功率连接到驱动器和驱动调节器。 挤出控制装置包括与驱动控制模块一起的接口单元，其允许输入包括速度设定和比率设定的控制信号，并允许显示至少一个操作条件。 驱动器控制模块具有连接到数据总线和接口单元通信通道的内部数据总线和通信通道。 为了控制挤出生产线工艺，具有多个具有相关期望的操作速度的被驱动元件，控制系统包括类似的多个挤出控制装置，其全部连接到控制器，以及另一驱动控制模块，用于输入 线速度设置。 控制器响应于输入线路速度设置和从动元件的操作条件，以将适当的数字控制信号输出到被驱动元件，以控制它们以期望的相关速度运行。 接口单元向驱动单元输出适当的模拟控制信号。