Knitting needles - Types Of Knitting Needle

KNITTING NEEDLE By Suneel Talekar- sr. Faculty- SOFT-Pune Knitting needle    3 TYPES OF KNITTING NEEDLES        !"# "  $%"& '# % %( • The bearded or spring needle was the first type of needle to be produced. • It is the cheapest and simplest type to manufacture as it is made from a single piece of metal • The bearded needle is essentially a frame needle, the needles being fixed to move Breaded needle ) • The head, where the stem is turned into a hook to draw the new loop through the old loop. • The beard, which is the curved downwards continuation of the hook that is used to separate the trapped new loop inside from the old loop as it slides off the needle beard. • The stem, around which the needle loop is formed. • The eye, or groove, cut in the stem to receive the pointed tip of the beard when it is pressed, thus enclosing the new loop. • The shank, which may be bent for individual location in the machine or cast with others in a metal ‘lead’. Breaded needle  *++,+ Breaded needle * The rest position Backward swing and overlap shog (b, c). The return swing and second rise (c, d). Pressing (e) Landing (f). Knock-over and underlap shog (g) Breaded needle * Breaded needle * 1. The needle is in the (so-called) rest position, with the previously formed loop (a) held on its stem and covered by the hook. 2. The loop is cleared from the needle hook to a lower position on the needle stem. 3. The new yarn (b) is fed to the needle hook at a higher position on the needle stem than the position of the previous (‘old’) loop. 4. The yarn is formed into a ‘new’ loop. 5. The hook is closed, enclosing the new loop and excluding and landing the old loop onto the outside of the closed hook. 6. The new loop (b) is drawn through the head of the old loop (a). Simultaneously the old loop slides off the closed hook of the needle and is cast-off or knocked-over. 7. The old loop now hangs from the feet of the fully formed new loop and the knitting cycle starts again. 1 2 3 4 5 6 7 Breaded needle   " • Less expensive • Strain on yarn is less • No possibility of fluff or lint accumulation on needle • Good for warp knitting machine • Required an additional element to close the beard during knitting • High wear and break easily • Limiting productivity • A knitting section occupies a considerable amount of space • Individual loop formation has to be achived by a loop forming element, this leads to a more complicated Breaded needle Latch Needle Charac te ris tics : -&#!.#$ & /&%0  (%& 1&$%%& 2&3%!& 4&%" & 5&6%$$ %%%.'. %"& %% Latch needle [...]... support to the needle and keeping the needle in its trick Latch needle Latch needle Latch needle Knitting action Latch needle Knitting action Latch needle Knitting action The rest position: The head of the needle hook is level with the top of the verge of the trick The loop formed at the previous feeder is in the closed hook It is prevented from rising as the needle rises, by holding-down sinkers or... to close on to the hook Latch needle Knitting action-cast off Knocking-over and loop length formation: As the head of the needle descends below the top of the trick, the old loop slides off the needle and the new loop is drawn through it Latch needle Advantages • Major advantages of being self acting or loop controlled, so that individual movement and control of the needle enable stitch selection... forward between the needles to hold down the sinker loops Latch needle Knitting action-latch opening Latch opening: As the needle butt passes up the incline of the clearing cam, the old loop, which is held down by the sinker, slides inside the hook and contacts the latch, turning and opening it Latch needle Knitting action-clearing height Clearing height: When the needle reaches the top of the cam, the... needle Latch needle Features The latch blade: This latch blade locates the latch in the needle Latch needle Features-latch and latch spoon The latch spoon: The latch spoon is an extension of blade and bridges the gap between the hook and stem Latch needle Features 7 The stem: The stem of latch needle carries the loop in the clearing on rest position 8 The Butt: Butt of latch needle enables the needle. .. latch due to rubbing of the yarn on needle Latch needle Difference between latch and bearded needle Latc h ne e dle 1 It contains a hook portion at the top & a latch reverted at certain distance from the needle head 2 The main element of knitting is latch 3 The latch needles are self-acting 4 Do not need outside agency to close the hook S pring be arde d ne e dle 1 This needle consists of a top hook curved... bearded needles are not self-acting type 4 It requires pressure to close the needle Latch needle Difference between latch and bearded needle Latc h ne e dle 5 Machine gauge is coarser then spring bearded needle 6 This one is not simple type needle 7 It has reduced stroke S pring be arde d ne e dle 5 Machine gauge is finer then latch needle 6 Simple type of needle 7 It has more stroke than latch needle. .. single knitting 9 Easy operating system 8 Most widely used in weft knitting 9 Complicated operating system 10 The latch needle is more 10 The spring bearded expensive & intricate needle needle is less expensive than Compound needle Types pusher type The open-stem ‘pusher type’ or slide needle tongue sliding The tubular pipe needle has its tongue sliding inside the tube of the open hook Compound needle. .. the open hook Compound needle Features • Compound needles consist o two separately controlled parts- the open hook and the sliding closing element (tongue, latch, piston, plunger) • It is most popular in warp knitting machines • Strain in not put on the yarn • Both members of compound needle have a straight, thus knitting speed can be increased • These needle are very expensive Thanks ... hook Latch needle Knitting action-yarn feeding Yarn feeding and latch closing: The needle starts to descend the stitch cam so that its latch is below the verge, with the old loop moving under it At this point the new yarn is fed through a hole in the feeder guide to the descending needle hook, as there is no danger of the yarn being fed below the latch The old loop contacts the underside of the latch,... selection devise • Latch needle can operate at any angle • Variation of the height of vertical can produce knit, miss and tuck loop which helps to manufacture different design fabrics Limitation • Latch needle are thick and rigid, so any deflection id design effect on fabric • Needle deflection is difficult • It imposes a certain strain on yarn • There is also possibility of fluff or lint accumulation . KNITTING NEEDLE By Suneel Talekar- sr. Faculty- SOFT-Pune Knitting needle    3 TYPES OF KNITTING NEEDLES      . outside of the closed hook. 6. The new loop (b) is drawn through the head of the old loop (a). Simultaneously the old loop slides off the closed hook of the needle and is cast-off or knocked-over. 7 additional support to the needle and keeping the needle in its trick ).% Latch needle  Latch needle * Latch needle * Latch needle %:8$ 