Textile Weaving Fundamentals
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What is the main purpose of the reed in the weaving process?

  • To determine the type of weave design
  • To perform the primary motion of beating-up (correct)
  • To increase the number of heald frames
  • To increase the gap between warp yarns

    • What does the count of the reed refer to?

  • The total length of the warp yarns used
  • The number of dents in a unit width of the reed (correct)
  • The number of heald frames in a loom
  • The thickness of the warp threads

    • What is the total number of ends in the given reed setup?

  • 72 (correct)
  • 36
  • 4
  • 18

    • What system is most commonly used to measure reed count?

    <p>Stockport reed counting system (B)</p> Signup and view all the answers

    How many dents are required to achieve 72 ends using a reed plan of 2 ends per dent?

    <p>18 (D)</p> Signup and view all the answers

    How does the reed help maintain the configuration of warp yarns?

    <p>By keeping them straight and parallel (D)</p> Signup and view all the answers

    What would be the stockport reed count needed for 56 ends per inch and a reed plan of 2 ends per dent?

    <p>28 (A)</p> Signup and view all the answers

    If the reed count is 72 Stockport, what is the relationship between ends, dents, and ends per dent?

    <p>Dents = Ends / Ends per Dent (A), Ends per Dent = Ends / Dents (B), Ends = Dents x Ends per Dent (D)</p> Signup and view all the answers

    Which of the following statements about the reed is incorrect?

    <p>Reed count depends on fabric design only (A)</p> Signup and view all the answers

    Which function is NOT performed by the reed?

    <p>Managing the tension in warp yarns (C)</p> Signup and view all the answers

    How is the average warp thread density calculated in this context?

    <p>Total number of ends divided by width (D)</p> Signup and view all the answers

    What are the two systems of reed counting based on?

    <p>Number of groups of dents and number of dents in space (A)</p> Signup and view all the answers

    If a reed plan changes to 4 ends per dent, how many dens would be needed for 72 ends?

    <p>9 (A)</p> Signup and view all the answers

    Which part of the reed helps create the gap for warp yarns?

    <p>The vertical steel wires (B)</p> Signup and view all the answers

    What would be the corrected stockport reed count if 36 dents were used at 2 ends per dent?

    <p>144 (A)</p> Signup and view all the answers

    Which of the following equations reflects the relationship between ends, dents, and reed count correctly?

    <p>Reed count = Dents x Ends = Ends per Dent (B)</p> Signup and view all the answers

    What is the formula used to convert between different reed counts?

    <p>Required Count = Dents of known system x Count of known system / Dents of unknown system (B)</p> Signup and view all the answers

    If the known system is 20 Irish reed count, what is the required Stockport reed count when converting?

    <p>100 (D)</p> Signup and view all the answers

    When converting from 72 Stockport reed count to Radcliff, what is the required count?

    <p>36 (B)</p> Signup and view all the answers

    For which reed count is the conversion to Leeds not provided?

    <p>100 Blackburn (A)</p> Signup and view all the answers

    What does the variable 'Dents of known system' represent in the formula?

    <p>The count of the reference reed type. (C)</p> Signup and view all the answers

    In the formula, what is the purpose of 'Dents of unknown system'?

    <p>To determine the value of the required count. (D)</p> Signup and view all the answers

    In the context of Reed Count Conversion, what does 'Dents per inch' refer to?

    <p>The density of the reed system. (B)</p> Signup and view all the answers

    Which of the following conversions would yield the largest required count?

    <p>20 Irish to Stockport (A)</p> Signup and view all the answers

    What does the reed plan (RP) refer to in fabric technology?

    <p>The number of ends passing through each dent of a reed (D)</p> Signup and view all the answers

    Which type of reed plan uses the same number of ends per dent throughout the width of the fabric?

    <p>Regular reed plan (D)</p> Signup and view all the answers

    How is the warp thread density of a woven fabric controlled?

    <p>Through reed count and reed plan (B)</p> Signup and view all the answers

    If the count of the known system is 100 and the required count is calculated using a dent of 0.444 inches for an unknown system with 19 dents at 2.11 inches, what will the required count be?

    <p>21 Leeds (C)</p> Signup and view all the answers

    What parameter is NOT mentioned as a method for controlling warp thread density?

    <p>Fabric weight (A)</p> Signup and view all the answers

    Which of the following terms is synonymous with reed plan?

    <p>Ends per dent (A)</p> Signup and view all the answers

    What defines an irregular reed plan?

    <p>Employs varying ends per dent across the fabric width (B)</p> Signup and view all the answers

    What is an incorrect statement about reed plans?

    <p>Reed plan has no relation to thread density. (D)</p> Signup and view all the answers

    What is the calculated number of ends if the reed count is 72 and the total ends in reed plan is 24?

    <p>54 (D)</p> Signup and view all the answers

    If the reed count is 30 dents/inch and total dents in reed plan is 13, what is the average warp thread density?

    <p>41.5 (A)</p> Signup and view all the answers

    How are the operators positioned during manual drawing-in?

    <p>Opposite to each other facing the heald frames (A)</p> Signup and view all the answers

    What type of process is described as being carried out automatically using special machines?

    <p>Automatic drawing-in (C)</p> Signup and view all the answers

    Which of the following values represents the total dents in the reed plan when the reed count is 30 dents/inch?

    <p>13 (D)</p> Signup and view all the answers

    What is the result of multiplying 30 by 1.384 in the context of warp thread density?

    <p>41.5 (C)</p> Signup and view all the answers

    Which of the following is NOT a method of drawing-in?

    <p>Independently (D)</p> Signup and view all the answers

    What is the value of total ends based on the formula Ends = Dents x Ends per dent for a reed count of 72 with 54 ends?

    <p>54 (D)</p> Signup and view all the answers

    Study Notes

    Drawing-in Draft

    • Obtained from specific weave designs
    • Displays required number of heald frames for weaving

    Reed

    • Essential component of the loom, made of wood or plastic
    • Comprises vertical steel wires spaced consistently
    • Gap between two consecutive wires referred to as a dent
    • Warp yarns pass through each dent, affecting warp thread density
    • Main function: beating-up, pushing the weft yarn into place
    • Additional functions include:
      • Controlling warp thread density
      • Keeping warp yarns straight and parallel

    Reed Count

    • Indicates number of dents per unit width of the reed
    • Dependent on required warp thread density
    • Most common is the Stockport reed counting system:
      • Defined as the number of dents per two inches of reed
    • Two methods for reed counting:
      • Grouping of dents in a defined space
      • Total count of dents in a defined space

    Reed Count Conversion

    • Conversion formula connects different reed counting systems:
      • Required Count = (Dents of known system/inch) x Count of known system / (Dents of unknown system/inch)
    • Examples illustrate conversions between Irish, Stockport, Radcliff, Blackburn, and Leeds reed counts.

    Reed Plan (RP)

    • Defined as the number of ends passing through each dent of a reed
    • Also known as ends per dent, denting order, or reed filling
    • Alters warp thread density by adjusting reed count and reed plan
    • Types of reed plans:
      • Regular: Same number of ends per dent across fabric width
      • Irregular: Varying ends per dent across fabric width

    Controlling Warp Thread Density

    • Managed on the loom through:
      • Reed count
      • Reed plan (denting order)

    Example Calculations

    • Various examples provided for calculating:
      • Warp thread density from reed plan and reed count
      • Determining required reed counts for desired ends per inch
      • Average warp thread density based on total ends and dents in reed plans

    Types of Drawing-in Process

    • Two methods for drawing-in:
      • Manual: Two operators manage the process
      • Automatic: Uses specialized machines for efficiency

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    Related Documents

    The Drawing-in Process PDF

    Description

    This quiz focuses on the basics of weaving, including the drawing-in draft and the role of the reed in loom mechanics. You'll learn about the structure and function of the reed, as well as how specific weave designs are formed through heald frames. Test your knowledge of essential weaving concepts.

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