1 Fundamental Operations in Weaving Dr Jimmy Lam Institute of Textiles & Clothing.

Slides:



Advertisements
Similar presentations
Fabric Construction Chapter 12
Advertisements

Simple Twill Weaves Point and herringbone twills
Dr. Jimmy Lam Institute of Textiles & Clothing
Dr. Jimmy Lam Institute of Textiles & Clothing
Classification of a Complete Design for a Woven Fabric
Single Cloth Construction Chapter One General Knowledge On Woven Fabric.
1.02 Understanding The Technical Design Process
WEAVING.
Textiles Material Woven Fabrics.
WEAVES. Weaves Plain Most simple and most common type of construction Inexpensive to produce, durable Flat, tight surface is conducive to printing and.
Presentation On Cronological Depelopment of Loom Tee Project - 1.
Introduction to Textile Fabric Part 1: Basic Knitted Fabrics
Intro. To Fiber Arts Fiber, Yarn, Fabrics.
Warp Knit Basic Structure
Chapter Four: Combined Weaves
Woven Fabric Structure (1) Plain and Twill
1.3 Fabric Representation
Introduction (1) Weaving Principle & Shuttle loom
Chapter Nine Gauze and Leno Weaves
Weaving Loom Parts. 1. Wood frame The wood frame is the skeleton of the loom and holds all the components together.
Weft insertion rate Group members: Annas azwany muzamil ( )
Chapter Seven Multi-ply Fabrics
8.2 Warp Pile Introduction: 1: Method of weaving 2: Cutting (arrows)
Chapter Three Derivatives of Elementary Weaves
UNIT Ⅱ Compound Structure
Chapter Two: Elementary Weaves (Fundamental Weaves)
7.5 Double width cloth 1. Concept 2. The main points of designing a double width cloth 3. The main points of weaving plan.
7.3 Interchanging double cloth
Chapter Ten Jacquard Fabrics 10.1 Elements of Jacquard Shedding 10.2 Preparation for Designing the Jacquard Fabrics 10.3 Steps in construction of Jacquard.
Woven Fabric Calculations
Introduction (2) Weaving machines: Shuttleless looms
1 Woven Fabric Geometry Dr Jimmy Lam Institute of Textiles & Clothing.
Er . Bhushan Kumar Shedding Mechanism …..
Plain Weave The simplest and most common weave pattern
Opportunities and Challenges for Textile Reinforced Composites Christopher M. Pastore Philadelphia University Philadelphia, Pennsylvania, USA.
The Electronic Needle Selection V-bed System Jimmy Lam Institute of Textiles & Clothing.
Mr. Chapman Forensics 30 Yarns and Textiles. Yesterday we discussed the process of making polymeric, synthetic fibers from a monomer “soup.” This is a.
Basic Weaves Basic Weaves
Weave, Draw-in and Peg Plan
Point Paper and Weave Float Dr. Jimmy Lam Institute of Textiles & Clothing.
Woven Designs and Fabric Costs Dr. Jimmy Lam Institute of Textiles & Clothing.
Woven Fabric Analysis (II)
Weaving Knitting Nonwoven/Felting
CHAPTER FIVE: COLOUR IN FABRIC DESIGN. 5.1 Dyeing in Coloured Yarn The term package dyeing usually denotes for dyeing of yarn that has been wound on.
Introduction to Textile Design
The use of Electronics and Weaving
Fabric: Types of Weaves
From fiber to fabric  When you look at fabrics you will see that most are made of fibers.  While there are exceptions, for example leather or plastic.
Chapter-3 Satin weave. Introduction Satin weave, although more complicated, is a flexible type of weave than the plain weave. It is called 'satin' when.
Warp Preparation Process Warping, Sizing & Draw-in
Knitwear Technology Part One : Simple V-bed CAM selection Jimmy Lam Institute of Textiles & Clothing.
Fabric Structure Subheading goes here.
Textile English TASK 4 HAVE A LOOK AT THE FABRICS AND PRODUCTION- An Outline of the Weaving Process.
Woven pile fabric By shilpi akhter Assistant professor
Construction of Woven Fabrics
9/30/2016www.emdadsir.yolasite.com1 Derivatives of plain weave Rib weave Warp rib Regular warp rib Irregular warp rib Weft rib Rgular weft rib Irregular.
Housing and Interiors I
Fabric Construction Clothing 2.
Fabric Construction: Woven Fabric Fabric Construction – Woven Fabrics
Obj Fibers, Yarns and Fabrics
1.02 Fabrics.
WEAVING KNITTING FELTING
Fabric Design & Analysis
Warp preparation for Weaving and Basic Operation of Weaving
1.02 Understanding The Technical Design Process
Fabric Design & Analysis
Picking--- 1 Lecture 3.
Weaves and Finishes Dye methods
Cone Over-Pick Mechanism
Presentation transcript:

1 Fundamental Operations in Weaving Dr Jimmy Lam Institute of Textiles & Clothing

2 Learning Objectives Four fundamental operations in weaving 1.Shedding 1.Tappet 2.Dobby 3.Jacquard 2.Picking 3.Beating up 4.Taking up and letting off

3 Shedding A process of raising and lowering of warp yarns by hardnesses to make an opening for the filling (weft) yarn to pass through The raised and lowered form of warp yarns is called shed

4 Shedding Three types of shedding motions (opening) are available for different type of fabrics. They are: 1.Tappet shedding 2.Dobby shedding 3.Jacquard shedding

5 Tappet shedding Tappet shedding uses tappets and cams to control the up/down movement of shafts. The bulkiness of its mechanical movement limits the loom to control up to 8 shafts (repeat not more than 8) Therefore, tappet shedding is the simplest and least versatile shedding motion. The design is restricted to plain weave, simple twill and simple sateen or satin weave. Any design more than 8 shafts requires dobby loom.

6 Dobby Shedding This is a compact, electronically guided shedding motion and capable of having up to 28 shafts. More complex and versatile shedding motion. A dobby loom, therefore, can have up to 28 shafts, and much greater weave repeat is possible. Design may be woven with two or more basic weaves and their variation. Such fabrics may be referred as dobby cloths or dobby weave, towels ususally show geometric designs when pattern is provided by dobby.

7 Jacquard Shedding To provide with unlimited design width, jacquard shedding is needed. This shedding motion has no shafts, instead, a hardness consisting of as many cords as there are ends in the warp sheet connects each end individually to the jacquard machine. Each warp could weave independently of all others. Complex and most versatile shedding motion. Biggest weave is possible with jacquard shedding as each warp yarn may be individually controlled.

8 Picking (weft insertion) Inserting filling (weft) yarn through the shed by carrier device. In shuttle loom, the weft carrier is the shuttle Whereas in the shuttleless looms, the projectile, air jet or water jet carriers the weft yarn. The weft insertion determines the production of weaving looms

9 Weaving Speeds Type of loomInsertion per minute Shuttle300 Flexible rapier950-1,300 Rigid rapier1,000-1,300 Projectile1,200 Water jet1,800-2,000 Air jet1,100-2,200 Multiphase5,400

10 Production rate (meter per 8 hours) RpmMeters/8 hours Handloom204 Ordinary loom16024 Modern auto shuttle loom Rapier loom40073 Projectile loom Air jet loom800146

11 Beating up Beating up pushes each loose filling yarn into cloth by the reed, after the shuttle has moved through the shed. The reed determines the sett (density) of the warp and weft. Beating-up gives the fabric firm and compact construction.

12 Conclusion Discuss three different types of shedding motions in weaving What are the advantages of dobby shedding over tappet shedding?