Method for manufacturing a cross-linked thermoplastic resin foam
    1.
    发明授权
    Method for manufacturing a cross-linked thermoplastic resin foam 失效
    交联热塑性树脂发泡体的制造方法

    公开(公告)号:US5310513A

    公开(公告)日:1994-05-10

    申请号:US927848

    申请日:1992-08-10

    摘要: There are provided a method and an apparatus for continuously manufacturing a cross-linked thermoplastic resin foam arranged as follows. A resin composition, which contains at least a thermoplastic resin, a foaming agent, and a cross-linking agent, is extruded into a closed die, which includes at least a molding region, a heating region, and a cooling region, continuously arranged in the order named. The resin composition is molded into a desired shape in the molding region of the die, and is then heated in the heating region to decompose the cross-linking agent and also to decompose at least part of the foaming agent so that cell nuclei are produced, thereby forming a partially foamed product. In the cooling region of the die, the partially foamed product is cooled to a temperature lower than the softening point thereof to be increased in rigidity, and is extruded to the outside of the die while being subjected to a damping force as it moves in the cooling region. The partially foamed product, extruded from the die, is heated under the atmospheric pressure to expand the foaming agent fully, whereupon a final product is obtained.

    摘要翻译: 提供了一种用于连续制造交联热塑性树脂发泡体的方法和设备,该交联热塑性树脂发泡体如下所述。 含有至少热塑性树脂,发泡剂和交联剂的树脂组合物被挤出成封闭的模具,其至少包括模制区域,加热区域和冷却区域,连续地布置在 命令命名。 树脂组合物在模具的模制区域中成型为所需形状,然后在加热区域中加热以分解交联剂,并且分解至少部分发泡剂以使得产生细胞核, 从而形成部分发泡的产品。 在模具的冷却区域中,将部分发泡的产品冷却到低于其软化点的温度以增加刚性,并且在模具的外部被挤压到模具外部,同时在其中移动时受到阻尼力 冷却区域。 从模具挤出的部分发泡产品在大气压下加热以使发泡剂充分膨胀,从而获得最终产品。

    Apparatus and process for generating a homogeneous magnetic field
    2.
    发明授权
    Apparatus and process for generating a homogeneous magnetic field 失效
    用于产生均匀磁场的装置和方法

    公开(公告)号:US4652826A

    公开(公告)日:1987-03-24

    申请号:US710163

    申请日:1985-03-11

    摘要: A process and apparatus for correcting a crude magnetic field of a main field generator having correcting magnetic field generators associated therewith to produce a substantially homogeneous corrected field. The process comprises the steps of measuring the distribution of said crude magnetic field at a plurality of points, expressing the crude magnetic field at each of the plurality of different measured points by a polynomial equation which contains a main homogeneous magnetic field component, successively higher order inhomogeneous magnetic field components, and a residual, determining the magnetic field output for the correcting generators such that the successively higher order inhomogeneous magnetic field components of the crude magnetic field are completely cancelled by the magnetic field outputs, respectively, of the correcting generators, and producing and superpositioning on the crude magnetic field the determined magnetic field output from the correcting generators.

    摘要翻译: 一种用于校正具有与其相关联的校正磁场发生器的主场发生器的粗磁场以产生基本均匀的校正场的方法和装置。 该方法包括以下步骤:通过包含主要均匀磁场分量的多项式方程来测量在多个点处的所述粗磁场的分布,表示多个不同测量点中的每一个处的粗磁场,连续更高阶 不均匀的磁场分量和残差,确定校正发生器的磁场输出,使得粗磁场的连续高阶非均匀磁场分量被分别由校正发生器的磁场输出完全抵消,以及 在粗磁场上产生和叠加来自校正发生器的确定的磁场。