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    • 68. 发明授权
    • Method of forming a foam coated convoluted tubing
    • 形成泡沫涂层的回旋管的方法
    • US5958315A
    • 1999-09-28
    • US130822
    • 1998-08-07
    • Francis B. FatatoLee H. Martin
    • Francis B. FatatoLee H. Martin
    • F16L57/00F16L9/21F16L11/11F16L11/118F16L55/02H02G3/04B29C44/06B29C44/12
    • B60R16/0215H02G3/0468
    • Convoluted tubing for automotive wiring harnesses and other elongated substrates is provided with sound dampening qualities by filling the valleys between convolutions with a flexible, resilient foamed composition, such as silicone rubber, and foaming the composition to cause expansion of the foam so that ribs of foam project radially from the valleys. In a preferred embodiment, spaced apertures are formed in the valleys to allow the expanding foam to form radially inwardly projecting fingers which contact the wiring harness and act to dampen vibrations. The corrugated tubing may be axially slit and the slit allowed to be filled with the foamed composition which, when foamed, eliminates noises caused by movement of the edge surfaces of the slit when torsional forces are applied to opposite ends of the tube.
    • 汽车线束和其他细长衬底的卷曲管道通过在旋转之间填充锥体与柔性弹性发泡组合物(例如硅橡胶)一起填充声音衰减品质,并使组合物发泡以引起泡沫膨胀,从而使泡沫的肋条 从山谷径向射出。 在一个优选实施例中,在谷中形成间隔开的孔,以允许膨胀的泡沫形成径向向内突出的指状物,其接触线束并起到阻尼振动的作用。 波纹管可以轴向切割,并且允许狭缝填充泡沫组合物,当发泡时,当扭转力施加到管的相对端时,该发泡组合物消除由狭缝的边缘表面的移动引起的噪声。