斷線是編織袋縫(feng)紉中最常(chang)遇到的故障(zhang)了，縫(feng)線質量不(bu)合要求(qiu)，機器調整不(bu)當，過線零件有(you)銳口、操作方法(fa)有(you)問題、機針冷卻不(bu)充分等等，均會導致斷線。當用鎖(suo)

式(shi)線(xian)跡編織袋(dai)縫(feng)紉機縫(feng)制(zhi)厚薄(bo)不均(jun)的(de)產品遇到(dao)斷線(xian)排(pai)故時，除了逐一考慮分析上(shang)述種種原因外，還應注意兩次鉤線(xian)引起的(de)斷線(xian)。 

   縫紉機行業(ye)眾所周(zhou)知，由于設計上分配(pei)動作周(zhou)期的需要，鎖式線跡編織袋縫紉機上軸與旋(xuan)梭的傳動比(bi)為1：2。即上軸轉一周(zhou)，旋(xuan)梭軸要轉兩周(zhou)。因此，在編織袋

縫紉過程(cheng)中，機(ji)針每刺(ci)料(liao)一(yi)次旋(xuan)梭旋(xuan)轉兩周(zhou)，一(yi)周(zhou)完成(cheng)鉤擴面(mian)線(xian)環動作，一(yi)周(zhou)空轉，如果(guo)旋(xuan)梭每周(zhou)都會鉤住面(mian)線(xian)，即機(ji)針刺(ci)料(liao)一(yi)次，旋(xuan)梭鉤線(xian)兩次，則必將與面(mian)線(xian)的(de)

收放發生沖突，產生將縫線繃斷的現象。 

這種情(qing)況在縫(feng)(feng)制厚(hou)薄(bo)不均的(de)縫(feng)(feng)料時(shi)是有可(ke)能出(chu)現的(de)：其(qi)原因得從鎖式線跡的(de)形成(cheng)過程(cheng)談起： 

   1、鎖式線跡形成過程簡述鎖式線跡是由面線與底線在縫料中相互交織而構成的。 編織袋縫紉機工作時，機針引帶面線穿過縫料，在到達下極限位置后，向上提升：由于縫料與縫線間存有摩擦力，因此面線未能隨機針同步提升，而是滯留在縫料下面，在彈性的作用下膨向機針兩側，形成環狀。 接著，旋梭的梭尖在運動過程中到達機針處，從面線環中穿過，并在繼續旋轉運動中，將鉤住的線環不斷擴大。繞至自身半徑處后，象跳繩那樣”躍”過擴大了的線環。 再往下的動作是挑線桿收線，送布牙送料為使這些動作有足夠的時間順利進行，旋梭仍以原速旋轉一周，但不再鉤線，僅僅空轉一圈。由于挑線桿的收線作用，原先被旋梭擴大并”躍”過的面線環迅速縮小，直至將旋梭梭心中引出的底線牽拉至縫料中，形成一次交織。 機針到達上極限位置后，再次向下引線刺料時，編織袋縫紉機周而復始，重復上述動作過程，從而在縫料上形成連續不斷有規律的鎖式線跡。 

   2、縫(feng)(feng)(feng)料(liao)(liao)厚(hou)(hou)度變(bian)化時(shi)(shi)(shi)鉤(gou)線(xian)(xian)(xian)(xian)(xian)時(shi)(shi)(shi)間(jian)的(de)(de)(de)(de)差(cha)異(yi) 調(diao)(diao)整(zheng)編(bian)織袋縫(feng)(feng)(feng)紉(ren)機(ji)(ji)(ji)的(de)(de)(de)(de)一次關鍵內容是(shi)調(diao)(diao)整(zheng)所謂鉤(gou)線(xian)(xian)(xian)(xian)(xian)時(shi)(shi)(shi)間(jian)，通常的(de)(de)(de)(de)調(diao)(diao)整(zheng)標準(zhun)是(shi)：當機(ji)(ji)(ji)針(zhen)(zhen)(zhen)(zhen)下(xia)降到最(zui)低位置(zhi)后(hou)，向(xiang)上提(ti)升(sheng)2．2mm時(shi)(shi)(shi)，梭(suo)尖(jian)到達機(ji)(ji)(ji)針(zhen)(zhen)(zhen)(zhen)中心線(xian)(xian)(xian)(xian)(xian)，距針(zhen)(zhen)(zhen)(zhen)孔上邊緣2mm。當然，這(zhe)并(bing)非是(shi)一成(cheng)(cheng)不(bu)變(bian)的(de)(de)(de)(de)。因(yin)為(wei)調(diao)(diao)整(zheng)鉤(gou)線(xian)(xian)(xian)(xian)(xian)時(shi)(shi)(shi)間(jian)的(de)(de)(de)(de)實質目的(de)(de)(de)(de)為(wei)的(de)(de)(de)(de)是(shi)使梭(suo)尖(jian)在形成(cheng)(cheng)飽(bao)滿并(bing)且(qie)穩定的(de)(de)(de)(de)最(zui)佳線(xian)(xian)(xian)(xian)(xian)環(huan)(huan)(huan)時(shi)(shi)(shi)鉤(gou)住面線(xian)(xian)(xian)(xian)(xian)，從而避免跳針(zhen)(zhen)(zhen)(zhen)現象(xiang)。由(you)于(yu)(yu)(yu)縫(feng)(feng)(feng)薄(bo)料(liao)(liao)是(shi)一般(ban)用的(de)(de)(de)(de)是(shi)細線(xian)(xian)(xian)(xian)(xian)，縫(feng)(feng)(feng)線(xian)(xian)(xian)(xian)(xian)本身柔軟，與(yu)縫(feng)(feng)(feng)料(liao)(liao)的(de)(de)(de)(de)摩擦(ca)力(li)較(jiao)小，而縫(feng)(feng)(feng)厚(hou)(hou)料(liao)(liao)時(shi)(shi)(shi)一般(ban)要用較(jiao)粗(cu)的(de)(de)(de)(de)線(xian)(xian)(xian)(xian)(xian)，縫(feng)(feng)(feng)線(xian)(xian)(xian)(xian)(xian)本身較(jiao)為(wei)硬挺，與(yu)縫(feng)(feng)(feng)料(liao)(liao)的(de)(de)(de)(de)摩擦(ca)力(li)大，因(yin)此(ci)，縫(feng)(feng)(feng)料(liao)(liao)厚(hou)(hou)度不(bu)同時(shi)(shi)(shi)，縫(feng)(feng)(feng)線(xian)(xian)(xian)(xian)(xian)形成(cheng)(cheng)最(zui)佳線(xian)(xian)(xian)(xian)(xian)環(huan)(huan)(huan)的(de)(de)(de)(de)時(shi)(shi)(shi)間(jian)是(shi)有差(cha)異(yi)的(de)(de)(de)(de)，這(zhe)就要求調(diao)(diao)整(zheng)鉤(gou)線(xian)(xian)(xian)(xian)(xian)時(shi)(shi)(shi)根(gen)據具體(ti)情況靈活掌握，方(fang)能(neng)獲得(de)理想(xiang)的(de)(de)(de)(de)編(bian)織袋縫(feng)(feng)(feng)紉(ren)效果。 有經驗的(de)(de)(de)(de)編(bian)織袋縫(feng)(feng)(feng)紉(ren)機(ji)(ji)(ji)維修工(gong)、操作工(gong)都知道，縫(feng)(feng)(feng)薄(bo)料(liao)(liao)時(shi)(shi)(shi)，梭(suo)尖(jian)要調(diao)(diao)“快”些；縫(feng)(feng)(feng)厚(hou)(hou)料(liao)(liao)時(shi)(shi)(shi)，梭(suo)尖(jian)要調(diao)(diao)“慢”些。其緣由(you)不(bu)難理解。 縫(feng)(feng)(feng)薄(bo)料(liao)(liao)時(shi)(shi)(shi)，縫(feng)(feng)(feng)線(xian)(xian)(xian)(xian)(xian)細而柔軟，機(ji)(ji)(ji)針(zhen)(zhen)(zhen)(zhen)稍(shao)稍(shao)由(you)下(xia)極限位置(zhi)提(ti)升(sheng)，裕出(chu)(chu)的(de)(de)(de)(de)縫(feng)(feng)(feng)線(xian)(xian)(xian)(xian)(xian)便會向(xiang)機(ji)(ji)(ji)針(zhen)(zhen)(zhen)(zhen)兩側(ce)膨起，形成(cheng)(cheng)線(xian)(xian)(xian)(xian)(xian)環(huan)(huan)(huan)。并(bing)且(qie)，由(you)于(yu)(yu)(yu)縫(feng)(feng)(feng)料(liao)(liao)與(yu)縫(feng)(feng)(feng)線(xian)(xian)(xian)(xian)(xian)摩擦(ca)力(li)小，機(ji)(ji)(ji)針(zhen)(zhen)(zhen)(zhen)繼(ji)續向(xiang)上提(ti)升(sheng)時(shi)(shi)(shi)，縫(feng)(feng)(feng)料(liao)(liao)與(yu)縫(feng)(feng)(feng)線(xian)(xian)(xian)(xian)(xian)相(xiang)(xiang)對(dui)位置(zhi)關系的(de)(de)(de)(de)隨機(ji)(ji)(ji)性較(jiao)大，加(jia)之縫(feng)(feng)(feng)線(xian)(xian)(xian)(xian)(xian)細軟，線(xian)(xian)(xian)(xian)(xian)環(huan)(huan)(huan)很容易偏轉，變(bian)得(de)難以保持(chi)穩定。因(yin)此(ci)，梭(suo)尖(jian)相(xiang)(xiang)對(dui)于(yu)(yu)(yu)機(ji)(ji)(ji)針(zhen)(zhen)(zhen)(zhen)的(de)(de)(de)(de)運動稍(shao)稍(shao)超(chao)前調(diao)(diao)整(zheng)有助于(yu)(yu)(yu)提(ti)高鉤(gou)線(xian)(xian)(xian)(xian)(xian)的(de)(de)(de)(de)可(ke)靠性。 相(xiang)(xiang)反，縫(feng)(feng)(feng)厚(hou)(hou)料(liao)(liao)時(shi)(shi)(shi)，縫(feng)(feng)(feng)料(liao)(liao)粗(cu)而硬挺，機(ji)(ji)(ji)針(zhen)(zhen)(zhen)(zhen)由(you)下(xia)極限位置(zhi)提(ti)升(sheng)較(jiao)高時(shi)(shi)(shi)，方(fang)能(neng)形成(cheng)(cheng)飽(bao)滿線(xian)(xian)(xian)(xian)(xian)環(huan)(huan)(huan)。并(bing)且(qie)，縫(feng)(feng)(feng)料(liao)(liao)與(yu)縫(feng)(feng)(feng)線(xian)(xian)(xian)(xian)(xian)的(de)(de)(de)(de)摩擦(ca)力(li)大，加(jia)之縫(feng)(feng)(feng)料(liao)(liao)較(jiao)為(wei)粗(cu)硬，即使機(ji)(ji)(ji)針(zhen)(zhen)(zhen)(zhen)提(ti)升(sheng)較(jiao)高，裕出(chu)(chu)的(de)(de)(de)(de)縫(feng)(feng)(feng)線(xian)(xian)(xian)(xian)(xian)較(jiao)多，線(xian)(xian)(xian)(xian)(xian)環(huan)(huan)(huan)也(ye)不(bu)會偏轉，仍可(ke)保持(chi)穩定。因(yin)此(ci)，將梭(suo)尖(jian)相(xiang)(xiang)對(dui)于(yu)(yu)(yu)機(ji)(ji)(ji)針(zhen)(zhen)(zhen)(zhen)的(de)(de)(de)(de)運動調(diao)(diao)得(de)遲后(hou)些更有益于(yu)(yu)(yu)防止跳針(zhen)(zhen)(zhen)(zhen)。