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This pin normally runs with the slot out of the polymer flow(the closed position). It will normally correct a heavy edge flow for a particular channel when the slot is exposed to that flow channel. For heavy center flow, a pin must be profiled to divert material from the center to the edges. To determine the profiling required , it is necessary to procure an actual profile of the sheet layering to determine the degree and locations of non-uniformity. The normal method of profiling is to use the standard slot depth of .168'' and to make adjustments to the length of the slot. The fine turning of the pin is done empirically by cutting and testing, then recutting if necessary. Pins can normally be changed out in less than five minutes. It is recommended that the pins either be fully in the flow(the open position) or fully out of the flow(the closed off position). For materials which are stable and will not degrade and ''flake off'' the pin can be rotated less than 180°to produce intermediate clearance depths. This works through a certain angular rotation of approximately 55°. |
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2楼2010-03-18 12:40:08
nandhutu
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3楼2010-03-18 15:13:29
luyuyouyue
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nandhutu(金币+4, 翻译EPI+1):谢谢 2010-04-01 16:50
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轴销通常在聚合物流动产生的(闭合)缝隙中运转。当缝隙暴漏在液流通路时候,轴销会对某股液流大的底部流动进行修正。对于强烈的中心流,销轴就得被压型以使物质从中心转到边缘部分。确定要求压型,需要获得实际的图,用来决定不均匀度的程度和位置。 压型的常规方法是用标准的缝隙深度(168)对缝隙的深度进行调整。通过剪切和测试,对销钉进行适当的旋转,如果必要可再剪切。销钉通常能在少于五分钟之内被改变成型。 推荐将 销钉或者全部没入液流(开放位置)或者出于液流之外(封闭的位置)。对于稳定,不会降解,且不会剥落的物质,可将销轴旋转小于180度的位置,以产生中间的净空深度。这会通过旋转大约55度角实现。 |
4楼2010-03-21 12:39:18













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