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text-align:center; font-size:16px; font-weight:bold; margin:0 auto">浅谈塑料薄膜流延成型中张力控制的两种方式</div><br /> <div style="width:100%; height:20px; text-align:center; margin:0 auto; color:#999;font-size:12px; border-bottom:#999 1px dotted">发布者:<a href="http://www.guaguababy.com/"><strong>吸塑包装</strong></a>|鑫隆包?  发布时间?019-3-14 9:54:07</div> <br> <div style="width:100%; margin:0 auto;font-size:14px;line-height:22px"> 1.磁粉制动?磁粉离合器张力控?br />       它的工作原理是由张力检测器来直接测定卷料的张力,然后把长了数据经过处理后再去自动调整磁粉离合器或制动器的激磁电流来控制收卷的张力。这种设备简单,价格便宜,可正反转,适用于张力精度要求不高的场合。但这种控制形式存在以下问题?br />       ①调节速度不快,难以在高速流延机上应用;<br />       ②张力控制精度不高,线性不够好,控制的卷径变化范围不大?br />       ③流延生产线上各张力段彼此独立,难以实现自动控制?br />       ④磁粉离合器存在发热和磨损问题,维修困难?br /> 2.浮动辊式张力控制方式<br />       该系统由主要由张力控制器、气压控制及汽缸、摆杆、浮辊电位器、浮动辊、牵引电机及调速器、制动器和离合器构成。它是一种间接的张力检测方式,实质上是一种位置控制,当张力稳定时,薄膜上的张力与汽缸作用力保持平衡,使浮辊处于中央位置?br />       当张力发生变化时,张力与汽缸作用力的平衡被破坏,浮辊位置会上升或下降,此时摆杆将绕汽缸轴顶部的销轴转动并带动浮辊电位器一起转动。这样,浮辊电位器准确地检测出浮辊位置的变化,它将以位置信号反馈给张力控制器,控制器经过计算并输出控制信号,控制牵引电机驱动系统进行纠偏。然后浮辊恢复到原来的平衡位置?br />       由于浮辊式张力检测装置本身是一种储能结构,利用其自身的升降作用,对大范围的张力跳变有良好的吸收缓冲作用,同时也能减弱料卷的偏心(椭圆)以及速度变化对张力的影响。由于受浮动辊自重及结构的影响,它不能用于低张力及变张力的控制。浮辊型张力控制方案是一种传统经典的张力控制方案,由于其成本较低,容易制作,至今在国内部分塑料薄膜流延成型设备上得到采用。但浮辊式型张力控制方案也存在着一些弱点,如浮辊式的张力设定是靠调节气压来实现的,实用中易受气源气压、浮辊自重、调节人的人为因素等影响。而且在小张力情况下(如小?kg张力PE薄膜)及变张力等情况下使用效果不佳?br /></div> <br> <div align="left" style=" line-height:20px;font-size:12px" > 『上一篇新闻?a href="newsshow-738-2.html">吸塑包装盒产品怎么辨别质量安全?/a><BR> 『下一篇新闻?a href="newsshow-10-2.html">2015塑料包装呈现三大亮点 环保个性样样不?/a><BR> <a style="font-size:12px;font-weight:bold" href="javascript:history.go(-1)">『返回上一页?/a> <a style="font-size:12px;font-weight:bold" href="./">『返回首页?/a> </div> <br /> <div class="clear"></div> <div class="xgxx"> <font>相关<a href="http://www.guaguababy.com/">吸塑包装</a>新闻</font> <div class="kasg"> <a href='newsshow-202-2.html'><span>·</span>阐述吸塑包装产品的多种方式发?/a> <a href='newsshow-388-2.html'><span>·</span>绿色包装的重要?/a> <a href='newsshow-23-2.html'><span>·</span>吸塑包装如何进行胶盒回收的呢?/a> <a href='newsshow-41-2.html'><span>·</span>吸塑包装盒在制作过程中常见的问题</a> <a href='newsshow-387-2.html'><span>·</span>吸塑包装制品的工?/a> <a href='newsshow-201-2.html'><span>·</span>你不得不知道的吸塑包装常?/a> <a href='newsshow-386-2.html'><span>·</span>吸塑包装的包装标?/a> <a href='newsshow-87-2.html'><span>·</span>吸塑包装讲述透明包装盒系列契合“科学、适用、?/a> <a href='newsshow-385-2.html'><span>·</span>吸塑包装设计的三大元素与吸塑的概?/a> <a href='newsshow-62-2.html'><span>·</span>吸塑包装的工作流程是什?/a> <a href='newsshow-384-2.html'><span>·</span>吸塑包装的成型过?/a> <a href='newsshow-383-2.html'><span>·</span>吸塑包装盒定?/a> <a href='newsshow-199-2.html'><span>·</span>吸塑一般都用什么材料?</a> <a href='newsshow-382-2.html'><span>·</span>吸塑包装四大常识问答</a> <a href='newsshow-86-2.html'><span>·</span>鑫隆包装介绍的吸塑包装基本知?/a> <a href='newsshow-381-2.html'><span>·</span>吸塑托盘的特性及用?/a> <a href='newsshow-198-2.html'><span>·</span>怎样辨别新旧吸塑制品?/a> <a href='newsshow-380-2.html'><span>·</span>吸塑产品常用模具的特?/a> <a href='newsshow-40-2.html'><span>·</span>吸塑包装关于吸塑盒和对折吸塑盒的区别</a> <a href='newsshow-4-1.html'><span>·</span>吸塑托盘行业发展的三大制约因?/a> <div class="clear"></div> </div> </div> </div> <div class="rightbot"></div> </div> <div class="clear"></div> </div> <div class="f_bg"> <br /> <div class="footer"> <div class="f_nav"> <a href="./" title="鑫隆首页">鑫隆首页</a> | <a href="gongsijianjie.html" title="关于鑫隆">关于鑫隆</a> | <a href="product-1.html" title="产品展示">产品展示</a> | <a href="other-2-1.html" title="工厂展示">工厂展示</a> | <a href="news-1.html" title="新闻中心">新闻中心</a> | <a href="feedback.html" title="在线留言">在线留言</a> | <a href="lianxiwomen.html" title="联系鑫隆">联系鑫隆</a> </div> <div class="f_logo fl"> <a href="./" title="鑫隆"><img src="images/logo.png" style="width:230px; 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