Machine Knitting Basics
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Questions and Answers

What is the basic repeating unit of knitted fabric?

  • Stitch
  • Loop (correct)
  • Yarn
  • Needle hook

    • Which components form a needle loop?

  • Foot, head, and yarn
  • Leg, head, and stitch
  • Foot, head, and leg
  • Head, side limbs, and foot (correct)

    • How are knitted loops arranged in knitted fabric?

  • Along the length
  • In courses and wales (correct)
  • In a single row
  • In random patterns

    • What is the smallest dimensionally stable unit of knitted fabrics?

    <p>Stitch</p> Signup and view all the answers

    What is true about the knitted stitch?

    <p>It usually consists of three or more intermeshed needle loops</p> Signup and view all the answers

    What happens during the needle's process of casting off loops?

    <p>Old loops are released to hang from new loops</p> Signup and view all the answers

    Which statement correctly describes how yarn flows in knitting?

    <p>Yarn passes from the foot of one loop into the next loop</p> Signup and view all the answers

    Which factor may obscure the visibility of knitted loops?

    <p>Effect of structural fineness or fabric distortion</p> Signup and view all the answers

    What does the term 'courses' refer to in knitted fabric?

    <p>Rows of loops across the width of fabrics</p> Signup and view all the answers

    What does WPI stand for in the context of knitted fabrics?

    <p>Wales Per Inch</p> Signup and view all the answers

    How is the technical back of a knitted fabric characterized?

    <p>It contains full back or purl loops.</p> Signup and view all the answers

    What happens to the fabric properties as loop length decreases?

    <p>Dimensional stability increases and fabric weight increases.</p> Signup and view all the answers

    Which statement about the relationship between wales and courses is true?

    <p>Courses per inch influence the density of the fabric.</p> Signup and view all the answers

    What condition could cause courses and wales to be less visible in knitted fabric?

    <p>Using very fine yarn or closely held loops</p> Signup and view all the answers

    What factor primarily influences the stitch density in a knitted fabric?

    <p>The loop or stitch length</p> Signup and view all the answers

    Which of the following statements is true regarding courses per inch (CPI)?

    <p>CPI is determined based on the stitch length.</p> Signup and view all the answers

    What defines the technical back and front side of a stitch?

    <p>The position of the legs at the binding points</p> Signup and view all the answers

    Which type of loop is primarily formed by the knitting needle during the yarn drawing process?

    <p>Needle loop</p> Signup and view all the answers

    What does a sinker loop connect in a knitted fabric?

    <p>Two adjacent needle loops</p> Signup and view all the answers

    What does the cover factor in fabric determine?

    <p>The handle, drape, and performance of the fabric</p> Signup and view all the answers

    How does a face loop differ from a back loop in the loop formation process?

    <p>Face loop emerges through the old loop from back to front</p> Signup and view all the answers

    How is stitch density (S) calculated?

    <p>By counting courses and multiplying them by wales</p> Signup and view all the answers

    What describes the technical face of a knitted fabric?

    <p>Side with face or knit loops</p> Signup and view all the answers

    What does a higher gauge fabric indicate regarding needles?

    <p>It requires finer needles with more stitches</p> Signup and view all the answers

    What characterizes a closed loop as compared to an open loop?

    <p>Legs of the loop cross at the base</p> Signup and view all the answers

    In knitting, what does gauge primarily measure?

    <p>The number of needles in a given space</p> Signup and view all the answers

    On a latch needle weft knitting machine, how are sinker loops formed?

    <p>By the needles drawing new loops in succession</p> Signup and view all the answers

    Which statement about 'cut' and 'gauge' is correct?

    <p>They express the fineness and coarseness of stitches</p> Signup and view all the answers

    Which of the following statements about the types of loops is incorrect?

    <p>Face loops are formed on the back side</p> Signup and view all the answers

    Which factor is NOT influenced by the yarn type in knitting?

    <p>The color of the fabric produced</p> Signup and view all the answers

    Which type of knitting machine measures gauge over 1.0 inch?

    <p>Circular knit hosiery machines</p> Signup and view all the answers

    What does a lower gauge typically require in terms of needles?

    <p>Larger needles for coarser fabrics</p> Signup and view all the answers

    What does a higher cut in knit fabric indicate?

    <p>Stitches are closer together</p> Signup and view all the answers

    How does the gauge affect the quality of knitted fabric?

    <p>A higher gauge means a denser and better fabric.</p> Signup and view all the answers

    What is the impact of using larger knitting needles on gauge?

    <p>Results in a coarser gauge</p> Signup and view all the answers

    What determines the closeness of stitches in knitted fabric?

    <p>Tension of the knitter and type of yarn</p> Signup and view all the answers

    What distinguishes a technically upright knitted fabric?

    <p>Courses run horizontally and wales run vertically</p> Signup and view all the answers

    What happens to gauge when using finer yarn?

    <p>Gauge becomes finer with more stitches per inch</p> Signup and view all the answers

    What is the relationship between the number of needles and the number of wales in knitted fabrics?

    <p>They are equal in number</p> Signup and view all the answers

    How does stitch density affect the weight and openness of knit fabric?

    <p>Higher density results in heavier and denser fabrics</p> Signup and view all the answers

    What is formed by the lateral movement of the yarns across the needles?

    <p>Underlap</p> Signup and view all the answers

    Which of the following is a characteristic of closed lap in knitted fabrics?

    <p>Rigid to elastic</p> Signup and view all the answers

    What happens in the fabric when neither overlap nor underlap occurs?

    <p>Warp float is produced</p> Signup and view all the answers

    What is a common effect of using guide bars that provide no lateral movement?

    <p>Hiding color warps at the back</p> Signup and view all the answers

    In warp knit fabric structures, what are all structures composed of?

    <p>Both overlaps and underlaps</p> Signup and view all the answers

    Which characteristic is NOT typical of warp knitted fabrics?

    <p>Limited pattern versatility</p> Signup and view all the answers

    What is the key feature of an open lap in knitted fabrics?

    <p>Ability to be raveled</p> Signup and view all the answers

    How does closed lap affect the visibility of knitted loops?

    <p>Completely obscures visibility</p> Signup and view all the answers

    What is the main purpose of the overlap in warp knitting?

    <p>To wrap the yarn around the needle for the knock-over</p> Signup and view all the answers

    How does an inlay bar function in a multi-guide structure in warp knitting?

    <p>It only creates adjacent layers of fabric without looping</p> Signup and view all the answers

    Which type of fabric is formed when overlap and underlap move in the same direction?

    <p>Open lap fabric</p> Signup and view all the answers

    What is a pillar stitch in the context of warp knitting?

    <p>A stitch that assists in forming loops when paired with lapping movements</p> Signup and view all the answers

    Why can't underlaps alone form a fabric in warp knitting?

    <p>Underlaps lack the necessary looping structure</p> Signup and view all the answers

    What distinguishes a closed lap from an open lap in warp knitting?

    <p>Closed laps occur when yarn movements are synchronized in opposite directions</p> Signup and view all the answers

    In what scenario would each needle knit a chain of stitches?

    <p>When the overlap technique is applied correctly</p> Signup and view all the answers

    What happens when the eyelet of one yarn guide travels through the needle line?

    <p>It creates a lateral overlap preparing for knitting</p> Signup and view all the answers

    What defines the key structural difference between warp knitted fabrics and weft knitted fabrics?

    <p>Warp knitting supplies yarns parallel to the selvedge.</p> Signup and view all the answers

    How is the overlap in warp knitting characterized?

    <p>The guide bar only feeds yarn to the same needle in each course.</p> Signup and view all the answers

    What role do underlaps play in warp knitted fabrics?

    <p>They are crucial in determining the fabric's pattern effects.</p> Signup and view all the answers

    Which statement accurately describes the appearance of the face of warp knitted fabric?

    <p>It has clearly defined knit stitches running vertically.</p> Signup and view all the answers

    What distinguishes the technical back side of a warp knitted fabric from the front side?

    <p>It has a consistent zigzag pattern of diagonal underlaps.</p> Signup and view all the answers

    In warp knitting, how are new yarn loops generally formed?

    <p>By pulling the new yarn loop through loops formed by other yarns.</p> Signup and view all the answers

    Why is careful examination of the face and back of warp knitted fabrics essential?

    <p>To identify and distinguish warp knits from weft knits.</p> Signup and view all the answers

    What term describes the diagonal floats of yarns in warp knitted fabrics?

    <p>Underlaps</p> Signup and view all the answers

    Study Notes

    Machine Knitting

    • Knitted structures are built progressively, row by row, of intermeshed loops.
    • New yarn is formed into a loop in each needle hook.
    • The needle pulls the new loop head first through the pre-existing loop.
    • Needles then release old loops, suspending them from the previous loops.
    • Cohesive structure is formed by intermeshed needle loops and yarn paths.

    Loop Structure

    • A loop is the basic repeating unit in knitted fabric.
    • A needle loop comprises a head and two side limbs/legs.
    • Each leg includes a foot that interlocks with the preceding loop.
    • Yarn passes through the foot and leg of the successive loop.
    • Knitted loop structure may be subtle due to fabric fineness, distortion, or finishing.
    • Knitted loops are arranged in rows, resembling woven warp and weft structure.
    • The rows and columns of loops are called courses and wales.

    The Stitch

    • The stitch is the smallest stable unit in knitted fabric.
    • A stitch typically contains three or more intermeshed loops.
    • Central loop passes through previous loop's head, then its head is intermeshed.
    • Repetition units are essential to create an uninterrupted structure.
    • Stitch types are determined by leg positions and are categorized as technical front or back.
    • Different stitch types result in varied fabric structures.
    • Needle loop type is determined by the needle design.

    Needle Loop

    • It forms the basic unit of a knitted structure.
    • The needle loop is formed by yarn pulled by the needle.
    • A needle loop comprises a top arc (head), two legs, and two bottom arcs (feet).
    • The legs of the loops connect to the preceding loop.
    • Yarn passes through the foot of the prior loop and attaches to the foot and leg of the subsequent loop.

    Sinker Loop

    • The lower part of the knitted loop is the sinker loop.
    • It joins one needle loop to the next.
    • Sinker loops exhibit on the opposite side of the fabric as needle loops.
    • Loop formation using sinkers occurs in machines such as the bearded needle weft knitting machine.

    Types of Loops

    • Face loops: New loop passes through the previous loop from back to front.
    • Back loops: New loop passes from face to back of the old loop.
    • Open loops: Loops don't cross at the bottom.
    • Closed loops: Loops cross to form closure.

    Technical Face/Back

    • Technical face: Entirely face/knit loops, the front side of fabric.
    • Technical back: Entirely back/purl loops, the back side of the fabric.

    Courses and Wales

    • Courses: Loop rows across fabric width, measured in units per inch (CPI).
    • Wales: Loop columns across fabric length, measured in units per inch (WPI).
    • CPI/WPI influence fabric density.
    • Fabric gauge (fineness/coarseness) influences fabric quality and weight.
    • Increasing CPI/WPI results in denser fabrics.

    Loop/Stitch Length

    • Stitch length is the yarn length within a loop, important for fabric properties.
    • Longer stitch length typically results in open, less dense fabric.
    • Loop length affects parameters like stitch density, fabric tightness, weight, and cost.

    Stitch Density

    • Stitch density (S) is the total number of loops in a measured area, measured in loops per square/centimeter or square inch.
    • Calculated by multiplying the number of courses (CPI) by the number of wales (WPI).

    Cut & Gauge

    • Gauge (GG) refers to knitting machine's needle spacing (fineness/coarseness).
    • Higher gauge indicates thinner needles and finer fabric.
    • Cut and gauge describe stitch closeness/openness.
    • Gauge measures needles per a specific distance on the machine.
    • Differences in gauge arise from varying knitting machines.
    • Gauge (cut) affects fabric density and texture.

    Technically Upright

    • Fabric's courses run horizontally while the wales run vertically with needle loops at the top and first knitted course at the bottom.

    Design Appearance Requirements

    • Technical face, technical back, and upright describe fabric orientation.
    • Technical descriptions may not align with how fabric is worn or produced.

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    Related Documents

    Knitting Terminologies PDF
    Warp Knitting Fabrics Basics of knitting PDF

    Description

    Explore the fundamental concepts of machine knitting, including the structure of knitted fabrics and the formation of loops and stitches. This quiz will help you understand how knitted structures are built and the significance of needle loops and yarn paths in creating cohesive fabric. Test your knowledge of the terminology and techniques used in machine knitting.

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