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    • 7. 发明公开
    • Method and apparatus for sorting non-ferrous metal pieces
    • Verfahren und Apparat zur Ausscheidung von Nichteisenmetall-Stücken。
    • EP0305881A1
    • 1989-03-08
    • EP88113802.8
    • 1988-08-24
    • HURON VALLEY STEEL CORPORATION
    • Osterberg, Richard R.Wolanski, Richard B.
    • B03C1/24
    • B03C1/247B03C2201/20
    • Mixed pieces of different non-ferrous metals are sorted by initially moving the pieces through a high density, rapidly changing magnetic flux field, and immediately thereafter, freely moving the pieces along unsupported forwardly and downwardly directed trajectories resulting from the momentum of the pieces, the force of gravity and the magnetically induced repulsive forces developed in the pieces by the flux field. The magnitude of the magnetically induced repulsive forces differ for different non-ferrous metals so that the lengths of the trajectories of generally similar size and shape pieces vary accordingly for separating pieces formed of different metals. The magnetic field is provided by a horizontally axised, rapidly rotating, hollow, liquid cooled, iron wall drum having magnets affixed to its outer surface. The magnets are arranged in rows that are formed of numerous, tile-­like, small, permanent magnets which are positioned end to end, with their like polarity ends adjacent. A belt conveyor, which moves the pieces across the top of the drum, has its discharge end pulley coaxially surrounding the drum so that the pieces freely move off the end of the conveyor belt after passing through the magnetic field. Hence, the lengths of the trajectories may be controlled by adjusting the speed of the conveyor, which adjusts the momentum of the pieces, and by adjusting the rotational speed of the drum for adjusting the frequency of the changes in the magnetic field and, consequently, the magnitude of the induced repulsive forces.
    • 不同有色金属的混合件通过首先通过高密度,快速变化的磁通场移动碎片进行分类,并且在此之后,随着片的动量而导致的沿着未支撑的向前和向下指向的轨迹自由移动碎片, 重力和通过磁通场在片中产生的磁力引起的排斥力。 对于不同的有色金属,磁感应排斥力的大小不同,因此大体上相似的尺寸和形状的轨迹的长度相应地因不同金属形成的碎片而变化。 磁场由具有固定在其外表面上的磁体的水平轴线,快速旋转,中空的液体冷却的铁壁鼓提供。 这些磁体被排列成由多个瓦片状,小型永久磁铁形成的排列,它们端对端设置,其相似极性相邻。 将传送带移动穿过滚筒顶部的带式输送机具有同轴地围绕滚筒的排出端滑轮,使得薄片在通过磁场之后自由地离开输送带的端部。 因此,可以通过调节输送机的速度来控制轨迹的长度,该速度调节片的动量,并且通过调节鼓的旋转速度来调节磁场的变化的频率, 诱发排斥力的大小。