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New packaging machine uses lightweight carbon fiber airshafts

机译：新包装机使用轻质碳纤维空气轴

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摘要

When Premier Paper Converting Machinery (New Berlin, Wis.) introduced its new custom machine for producing Kraft paper honeycomb used to make packaging materials, the device was equipped to hold four massive 98-ineh/2.4m wide rolls of paper, each one weighing 5,300 lb/2,409 kg. To support these paper rolls during unwinding, stiff and lightweight carbon/epoxy "airshafts" were required. The airshafts were filament wound by Nim-Cor Inc. (Nashua, N.H.), which also provides airshafts in steel, aluminum and metal alloys and related core chuck products. An airshaft, also known as an expanding core shaft, is a hollow metallic or composite tube with metal end journals and bearings that fit into the converting machine. Inside the tube is an elastomeric bladder that, when inflated pneumatically, causes lugs or "buttons" to pop outward from the tube wall to form protuberances. The extended buttons firmly grip the inner core of the paper roll so that the paper can be smoothly unwound by the machine (button holes can be seen in the tube photo). When empty paper rolls need to be replaced, air pressure in the bladder is released, the buttons retract and the airshaft can be pulled easily from the roll.
机译：当Premier Paper Conversions机械公司（威斯康星州新柏林）推出其用于生产用于包装材料的牛皮纸蜂窝的新定制机器时，该设备可容纳四块98英寸/2.4m宽的大卷纸，每卷重5300磅/ 2409千克为了在退绕期间支撑这些纸卷，需要坚硬且轻质的碳/环氧树脂“空气轴”。空气轴由Nim-Cor Inc.（N.H.）缠绕而成，该公司还提供钢，铝和金属合金以及相关芯卡盘产品的空气轴。空气轴，也称为膨胀芯轴，是空心的金属或复合管，带有金属端颈和轴承，可安装在转换机中。在管子内部是一个弹性囊，当通过气动方式充气时，会导致凸耳或“纽扣”从管壁向外弹出，形成突起。伸出的按钮牢固地抓住纸卷的内芯，以便机器可以平稳地解开纸卷（在管照片中可以看到按钮孔）。当需要更换空纸卷时，将释放气囊中的气压，按钮会缩回，并且可以轻松地从卷纸中拉出空气轴。

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