2 Presented by Name with ID: Textile 5th Intake Section 1 Shawan Roy (023)Ahmmed Sharjin Sharif (024)Pankaj Roy (025)Kohinur (027)Textile 5th IntakeSection 1Bangladesh University of Business & Technology
3 What is fabric?Manufactured assembly of interlacing or interloping fibers, filaments, and/or yarns having substantial surface (planar) area in relation to its thickness, and adequate mechanical strength to give it a cohesive structure.Most fabrics are knitted or woven, but some are produced by non- woven processes such as braiding, felting, and twisting.We are generally using weaving and knitting to make fabric.
4 What is knitting and knit fabric? Knitting is a method by which thread or yarn is used to create a cloth.Knitted fabric consists of a number of consecutive rows of loops, called stitches.As each row progresses, a new loop is pulled through an existing loop.The active stitches are held on a needle until another loop can be passed through them.This process eventually results in a fabric, often used for blankets or garments.Fabrics made from only one set of yarns, all running in the same direction. Some knits have their yarns running along the length of the fabric, while others have their yarns running across the width of the fabric.Knit fabrics are held together by looping the yarns around each other.
5 Types of knitting There are two types of knitting Weft knittingWarp knittingWeft knitting: Weft knitting is a method of fabric forming in which loops are formed in a horizontal way from a single yarn & intermeshing of loops takes place in a circular & flat from on across wise basis.Warp knitting: Warp knitting is a method of fabric forming in which the loops are formed in a vertical way along the length of fabric from each warp yarn & intermeshing of loops takes place in a flat from of length wise basis.
6 Classification of weft knitting machine According to the frame design & needle bed arrangement.Circular knitting machineFlat knitting machine
7 Classification of weft knitting machine According to the no. of needle bed.Single jersey circular knitting machineDouble jersey circular knitting machine
8 Classification of weft knitting machine According to the end product of the weft knitting machine.Fabric machineGarments length machine
9 Classification of weft knitting machine According to the basic structure of the weft knittingPlan or single jersey circular knitting machineRib flat or circular knitting machineInterlock flat or circular knitting machinePurl or link-link flat or circular knitting machine
10 Classification of weft knitting machine According to the type of needle use.Knitting machine equipped with latch needleCircular knitting machineOne needle bed (Single jersey knitting machine)Two needle bed (Rib or interlock knitting machine)Double (Purl knitting machine)Flatbed knitting machineOne needle bedTwo needle bed (V-bed flat knitting machine)Knitting machine equipped with spring breaded needleStraight bar frame
11 Feature of single jersey circular knitting machine Single jersey circular knitting machine has normally rotating (clockwise) cylindrical one set of needle bed.Generally latch needles are used.Generally machine needles gauge is 24. It can be various from 10 to 36 for producing finer or coarser fabric.For Single Jersey machine, holding down sinker are used, one between every needle space.Latch needle cylinder & sinker ring revolve through the stationary knitting cam.For single jersey machine, sinker trick ring is simply & directly attached to the outside top of needle cylinder.Stationary yarn feeders are situated at regular intervals around the circumference of the rotating cylinder.
12 Feature of rib circular knitting machine In rib circular knitting machine, there are two needle bed. One set of needles are mounted on a vertical cylinder & other set of needles are mounted on horizontal dial.The cylinder and dial needles are rib of gaiting (the dial needles are midway between the cylinder needles).Both cylinder & dial needle bed should have two types of needle (short & long needles).Generally needle gauge is 18.
13 Feature of interlock circular knitting machine In interlock circular knitting machine, there are two needle bed. One set of needles are mounted on a vertical cylinder & other set of needles are mounted on horizontal dial.The cylinder and dial needles are interlock of gaiting (the dial needles are face to face between the cylinder needles).Both cylinder & dial needle bed should have two types of needle (short & long needles).Generally needle gauge is 20.
15 Main parts of knitting machine & function NeedleNeedle is a tiny hocked elements used for loop formation.Needle used for knitting are three typesLatch needleSpring bearded needleCompound needleFunction:To feed yarn.Loop formation.To hold the old loop.
16 Main parts of knitting machine & function Cam (knit, tuck, miss)Cam converts the rotary machine drive into suitable reciprocating action for the needles or other elementsEach needle action is obtained by means of cams acting on the needle bedThree types of cam. (knit, tuck, miss)Help to produce knit, tuck & miss loop.
17 Main parts of knitting machine & function SinkerSinker is a thin metal plate which is placed at right angle between the adjoining needles.Sinker are tree typesHolding downLoop-pullingKnock-overSinker is used in single jersey circular knitting machine.Function:Loop formation.Holding down.Knock over the surface. Where its upper surface or belly supports the old loop as the new loop is down through it.
18 Main parts of knitting machine & function DialDial is a upper steel needle bed used in double knit machine.In the groves of dial the needles are mounted horizontally & are also to move radially in & out by their dial cam sinker used here.Dial is used in double jersey (rib or interlock) circular knitting machine
19 Main parts of knitting machine & function CreelTo hold the cone holder.Cone holderTo hold the package.Plastic tubeTo pass the yarn.Positive feederTo storage the yarn.To pass the specific amount of yarn by driving unit.Storage unitTo storage the yarn in storing unit.
20 Main parts of knitting machine & function Indicator lightTo indicate any problem of machine.Magnetic type tensionerTo create tension in feed yarnCylinderTo hold the needle.FeederTo feed the yarn to needleCam boxTo hold the cam.
21 Main parts of knitting machine & function Sinker ringTo hold the sinker.Fabric spreaderTo change the circular to flat shape of fabric.Fabric take down rollerTo take down the fabric.SensorTo identify the breakage of yarn.Dust removing fanTo remove the dust.Needle detectorTo identify the needle breakage.
22 Main parts of knitting machine & function VDQ (Variable diameter for quality) pulleyTo control the GSM.It gives motion to the positive feederDiameter of VDQ ↑ ↔ Speed of Tooth belt ↑ ↔ Speed of yarn feeder ↑ ↔ Loop Length ↑ ↔ GSM ↓Diameter of VDQ ↓ ↔ Speed of Tooth belt ↓ ↔ Speed of yarn feeder ↓ ↔ Loop Length ↓ ↔ GSM ↑QAP (Quality Adjustable pulley) pulleyTo adjust tooth belt tension.To adjust the quality of fabric.
23 Main parts of knitting machine & function Toothed beltTo transfer the motion from VDQ pulley to positive feederMotorTo produce the motion the machine.Lubricating systemTo pass the lubricating oil in the machine.
24 Main parts of knitting machine & function SensorTo identify the breakage of yarn.Cam for sinkerTo more the sinker is machine.Yarn guideTo guide the yarn.