作者：
作者單位：
刊名：HIGH-PERFORMANCE Composites
ISSN：1081-9223
出版年：2008-01-05
卷：16
期：5
起頁：69
止頁：69
分類號：TQ175
語種：英文
關鍵詞：
內容簡介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 button s retract and the airshaft can be pulled easily from the roll.
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