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    • 8. 发明授权
    • Low turbulent flow high speed cutter knife
    • 低湍流高速切刀
    • US06848639B2
    • 2005-02-01
    • US10074270
    • 2002-02-12
    • Judeth Brannon CorryCliff Knight
    • Judeth Brannon CorryCliff Knight
    • B26D1/36B26D1/00B29B9/06B02C18/14
    • B29B9/065B26D1/0006B26D2001/0053Y10T82/16065Y10T82/16131
    • A cutting blade includes a connection portion for connection to a cutting head for rotating the blade, preferably in association with other blades being rotated with the cutting head. The blade body also includes a blade body portion with a leading edge with a cutting blade portion and an upper leading surface and lower leading surface extending from the leading edge to an upper transition zone and lower transition zone respectively. A upper trailing surface extends from the upper transition zone to a trailing edge and a lower trailing surface extends from the lower transition zone to the trailing edge. The upper and lower trailing surfaces converge such that the blade body portion is hydrodynamically shaped. According to a further embodiment, the cutting blade has a sickle shape. Specifically the cutting blade portion progresses from a leading location toward a trailing location of this leading edge or cutting edge as it extends radially outwardly from the blade body connection portion toward a radially outer end of the blade knife portion. The blade knife body is advantageously used as part of an underwater pelletizer with a shaft supporting the blade knife body. The pelletizer fluid passage structure forms the fluid coolant flow passage and supports the shaft. A pelletizing die plate is disposed such that the polymer material is extruded into the coolant flow passage and is cut by the blade.
    • 切割刀片包括用于连接到用于旋转刀片的切割头的连接部分,优选地与与切割头一起旋转的其它刀片相关联。 叶片主体还包括具有前缘的刀片主体部分,其具有切割刀片部分,并且分别从前缘延伸到上过渡区域和下过渡区域的上前表面和下前导表面。 上部后表面从上部过渡区域延伸到后缘,下部后表面从下部过渡区域延伸到后部边缘。 上下表面会聚,使得叶片主体部分是流体动力学的。 根据另一实施例,切割刀片具有镰刀形状。 具体地,当切割刀片部分从刀片主体连接部分朝向刀片刀部分的径向外端径向向外延伸时,切割刀片部分从该前缘或切削刃的前进位置向后延伸。 叶片刀体有利地用作具有支撑刀片刀体的轴的水下造粒机的一部分。 造粒机流体通道结构形成流体冷却剂流动通道并支撑轴。 造粒模板被设置成使得聚合物材料被挤出到冷却剂流动通道中并被叶片切割。