針織學(xué)(雙語(yǔ))課件Chapter2

1、1Chapter 2Basic mechanical principles of knitting technology22.1 The sinker 沉降片沉降片nThe functions of the sinkerLoop formation 成圈成圈Holding-down 握持握持Knocking-over 脫圈脫圈32.1 The sinker 沉降片沉降片The first function: loop formation 成圈成圈On bearded needle weft knitting machines of the straight bar frame and sink

2、er-wheel type/帶彎紗輪的帶彎紗輪的平型緯編鉤針機(jī)平型緯編鉤針機(jī), the main purpose of a sinker is to sink/彎曲彎曲 or kink/扭結(jié)扭結(jié) the newly laid yarn into a loop.4帶彎紗輪的平型緯編鉤針機(jī)帶彎紗輪的平型緯編鉤針機(jī)5The second function: holding-down 握持握持N: nib of nose of sinker 片鼻片鼻T: throat 片喉片喉6The third function: knocking-over 脫圈脫圈B: belly 片顎片顎V: the verg

3、e or upper surface of the trick-plate 針槽板針槽板72.2 The jack 底腳片底腳片,挺針片挺針片It may be used to provide versatility of latch needle selection and movement.It is placed below the needle and has its own operating butt and cam system.82.3 Cams 三角三角,凸輪凸輪Cams are the devices which convert the rotary machine dri

4、ve into a suitable reciprocating action for the needles and other elements.The cams are of two types, engineering cams/工程凸輪工程凸輪 and knitting cams/針織三角針織三角.9n2.3.1 Engineering cams 工程凸輪工程凸輪The drive is transmitted and adapted via cam-followers/凸輪轉(zhuǎn)凸輪轉(zhuǎn)子子, levers/連桿連桿, pivots and rocker shafts/擺桿擺桿. It

5、produces all the required movements of the elements in their correctly-timed relationship.10n2.3.2 Knitting cams 針織三角針織三角Two arrangements exist:(a)Revolving cylinder machines/針筒轉(zhuǎn)動(dòng)針織機(jī)針筒轉(zhuǎn)動(dòng)針織機(jī)(b)Reciprocating cam-carriage flat machines/三角座移動(dòng)橫機(jī)三角座移動(dòng)橫機(jī) or rotating cam-box circular machines/三角座轉(zhuǎn)動(dòng)圓機(jī)三角座轉(zhuǎn)動(dòng)圓機(jī)

6、11n2.3.2 Knitting cams 針織三角針織三角cam-plate/三角座三角座,三角底板三角底板raising cam (clearing cam)/起針三角起針三角,退圈三角退圈三角stitch cam/成圈三角成圈三角upthrow cam/回針三角回針三角knock-over cam/脫圈三角脫圈三角guard cams/護(hù)針三角護(hù)針三角12bolt cam/進(jìn)出三角進(jìn)出三角132.4 The three methods of forming yarn into needle loops By sinking the yarn into the space between adjacent needles using loop forming sinkers or other elements which approach from the beard side.14 By causing latch needles to draw their own needle loops/圈干圈干 down through the old loops as they descend, one at a time, down the stitch cam.15 By causing a warp yarn guide to wrap the yarn loop ar