<section class="_135editor" data-role="paragraph" style="max-inline-size: 100%; margin: 0px; padding: 0px; border: 0px none; z-index: 0; overflow-wrap: break-word !important; outline: none 0px !important;"><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;">　　1．胶毯预缩机理</span></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;"></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;">　　织物的收缩是由橡胶毯、进布加轧辊和加热承轧辊之间的压力以及橡胶毯弹性收缩所产生的作用而形成的。橡胶毯受力发生弯曲时，可以看出它的外弧伸长，内弧收缩；若将该橡胶毯反向受力发生弯曲时，则原来伸长的一边发生收缩，而原来收缩的一边发生伸长，如图9-1所示。</span></p><p style="text-align: center; max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><img src="https://dayaotex-edu.fsh.bcebos.com/v1/dayaotex-edu/9-1.png?authorization=bce-auth-v1%2F59b7a26546d74b64bfd056b483465817%2F2023-06-28T03%3A07%3A42Z%2F-1%2F%2Fae66af86f5ba53c7990c570388416a5d725c0ac71f2e8c03231b51e2346dfd7e" data-filename="" style="width: 25%;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;"><br></span></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;"></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;">　　若将含湿的棉织物紧贴在橡胶毯表面，则该织物将随着橡胶毯发生形变，随着橡胶毯伸长和压缩而发生伸长和压缩，使织物纬纱密度增加、经向收缩，达到一定的预缩效果。</span></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;"></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;">　　如图9-2所示，在进行机械预缩整理时，橡胶毯随导辊而运行，伸长、压缩不断变换。进布时将织物紧贴在橡胶毯伸长部位a处。当橡胶毯围绕于给布辊时，外表面伸长，内表面缩短即a&gt;b&gt;c，运转至加热承轧辊后，a段由伸长变化为缩短，b段不变（b为胶毯中部），c段发生伸长，这时出现a'&lt; b'&lt;c＇。由于b=b'，因此a&gt;a'。由于给布辊与加热承轧辊之间的压力作用，使橡胶毯受到剧烈压缩而变薄伸长，而运行到S点时，这种挤压作用消失，橡胶毯将向外恢复弹出，产生了向后挤压的作用力F，这个反作用力使得橡胶毯紧压于承轧辊，也就将织物紧贴在了橡胶毯上，不能滑动。这样织物的形状将完全按橡胶毯变形，进入压缩区域，橡胶毯压缩，织物也随其压缩即发生收缩，从而达到了预缩的目的。当橡胶毯离开承轧辊时，织物必须立即离开橡胶毯。因此橡胶毯在后面的导辊上又呈拉伸状态，如织物不及时离开橡胶毯将又会被拉伸而消除预缩效果。织物上的水分和加热作用增加纤维的可塑性，提高了织物的预缩效果。</span></p><p style="text-align: center; max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><img src="https://dayaotex-edu.fsh.bcebos.com/v1/dayaotex-edu/9-2.png?authorization=bce-auth-v1%2F59b7a26546d74b64bfd056b483465817%2F2023-06-28T03%3A07%3A55Z%2F-1%2F%2F4cd0b36018c4889cca83fc795ea6a2a64f36a24e41b434a7018cb9ca3912999a" data-filename="" style="width: 25%;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;"><br></span></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;"></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;">　　从织物预缩机理可知，织物的预缩效果取决于胶毯厚度、给布辊与承轧辊之间的压力、织物的含湿状况以及承轧辊的温度。因此，胶毯厚度越厚，压力越大，含湿量越均匀，温度越高，织物的预缩效果就越好。</span></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;"></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;">　　2．胶毯预缩机的类型及结构</span></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;"></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;">　　目前使用的胶毯预缩机主要有简式三辊橡胶毯预缩机、布铗链预缩整理联合机和普通三辊橡胶毯预缩机等。</span></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;"></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;">　　（1）简式三辊橡胶毯预缩机：如图9-3所示，它由进出布装置、给湿装置及三辊橡胶毯预缩装置组成。其核心机构是三辊橡胶毯预缩装置，如图9-4所示，它由橡胶毯、加热承轧辊、加压导辊及橡胶毯调节装置等组成，承轧辊用蒸汽加热，给湿采用水管喷雾给湿。</span></p><p style="text-align: center; max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><img src="https://dayaotex-edu.fsh.bcebos.com/v1/dayaotex-edu/9-3.png?authorization=bce-auth-v1%2F59b7a26546d74b64bfd056b483465817%2F2023-06-28T03%3A08%3A10Z%2F-1%2F%2Fb42c288717d1754fe10632cd959808e951d285ea68c6a1f99e8cdc594fb00721" data-filename="" style="width: 25%;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;"><br></span></p><p style="text-align: center; max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><img src="https://dayaotex-edu.fsh.bcebos.com/v1/dayaotex-edu/9-4.png?authorization=bce-auth-v1%2F59b7a26546d74b64bfd056b483465817%2F2023-06-28T03%3A08%3A19Z%2F-1%2F%2F9a0956b2bd35ef01e27312e8956b73c1ef0d20f7abaf83617eab57856214a930" data-filename="" style="width: 25%;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;"><br></span></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;"></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;">　　织物运行过程为：进布架干进布→水管喷雾给湿-三辊胶毯预缩-落布架落布</span></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;"></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;">　　该机结构简单，成本低，操作方便，但预缩效果不稳定。</span></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;"></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;">　　（2）布铗链预缩整理联合机：如图9-5所示，全机由进出布装置、汽蒸给湿装置、短布铗拉幅装置、三辊橡胶毯预缩机及呢毯烘干部分组成。进出布装置由张力器、吸边器、喂入辊及布速测定仪组成。给湿采用喷雾和汽蒸箱，以提高渗透吸湿效果。短布铗拉幅装置使织物平整无折皱地进入三辊胶毯预缩机，并能依据工艺需要调整织物的喂入速度和经、纬向张力。预缩装置是预缩机的核心部件，由进布、加热承轧辊、橡胶毯、加轧辊、橡胶毯导辊及张力调节器、橡胶毯冷却等装置组成。呢毯烘干机的作用是对经三辊橡胶毯预缩的织物进行烘干定形，以保证织物的缩水稳定性，并能改善织物的手感和光泽。</span></p><p style="text-align: center; max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><img src="https://dayaotex-edu.fsh.bcebos.com/v1/dayaotex-edu/9-5.png?authorization=bce-auth-v1%2F59b7a26546d74b64bfd056b483465817%2F2023-06-28T03%3A08%3A30Z%2F-1%2F%2F2daccef742f24489a577c3102b351f6e422eff083df3508a9577bc1aa03701a6" data-filename="" style="width: 25%;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;"><br></span></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;"></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;">　　织物运行过程为：进布架干进布→给湿箱喷雾给湿和蒸汽给湿→单烘筒预烘→短布铗拉幅→三辊橡胶毯预缩→呢毯整理机平烫烘燥→冷却装置冷却→消除静电→落布架落布</span></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;"></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;">　　（3）普通三辊橡胶毯预缩联合机：结构如图9-6所示。它与布铁链预缩联合机相比，只是少了一个短布铗链拉幅装置，给湿部分采用给湿箱给湿，给湿箱内装有喷汽管和喷雾管，织物可双面喷雾给湿，也能喷雾与蒸汽加热同时进行，以提高织物的渗透给湿率。</span></p><p style="text-align: center; max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><img src="https://dayaotex-edu.fsh.bcebos.com/v1/dayaotex-edu/9-6.png?authorization=bce-auth-v1%2F59b7a26546d74b64bfd056b483465817%2F2023-06-28T03%3A08%3A41Z%2F-1%2F%2Fa5a6a7aefae6d26124542aab773d6b6d4156a500969f0aea4ee358b47809cdb3" data-filename="" style="width: 25%;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;"><br></span></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;"></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><span style="max-inline-size: 100%; margin: 0px; padding: 0px; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;">　　织物运行过程为：进布架干织物进布-给湿箱双面喷雾给湿→单只烘筒预烘→三辊橡胶毯预缩→呢毯熨烫烘燥→落布架落布</span></p><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; text-indent: 2em; line-height: 1.75em; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; overflow-wrap: break-word !important; outline: none 0px !important;"></p></section><section class="_135editor" data-role="paragraph" id="autoparagraph" style="max-inline-size: 100%; margin: 0px; padding: 0px; border: 0px none; z-index: 0; overflow-wrap: break-word !important; outline: none 0px !important;"><p style="max-inline-size: 100%; margin-bottom: 0px; clear: both; min-height: 1em; cursor: text; overflow-wrap: break-word !important; outline: none 0px !important;"><br style="max-inline-size: 100%; margin: 0px; padding: 0px; font-family: 微软雅黑, &quot;Microsoft YaHei&quot;, sans-serif; font-size: 17px; caret-color: rgb(255, 0, 0); overflow-wrap: break-word !important; outline: none 0px !important;"></p></section>