Welcome to our Presentation

Presented By

• Md. Ajaher Ali ID: 113-23-2688

• Sm. Mahasin ID: 113-23-2717

“Study of Modern weaving Machines”

Modern Looms

Modern looms still weave by repeating in sequence the operations of shedding, picking, and beating in, but within that framework there has been considerable development during the 20th century. Several new types of loom have come into industrial use, whereas older types have been refined and their scope extended. Two main influences have been the rising cost of labour and the increasing use of man-made continuous-filament yarns.

Main Features of Projectile Loom:

1.The picking are projectile receiving units are separated from the moving sley. The sley carries the reed & gripper guides.2.The gripper projectile made of fine steel, 90 mm long 14mm wide and 6 mm thickness weight is 40 g. It carries the weft thread into the warp shed.3.The weft is drawn directly from a large stationary cross wound package. There is no weft winding.

1.An useful feature of rigid rapiers is that they can be simultaneously inserted in two sheds one above the other, for producing double plush and certain carpets.2.Rapier loom may have various types according to the weft insertion mechanism & number of pick such as insertion of double pick, insertion of single pick, two phase rapier etc.3.In all rapier looms to-and-fro-movement of the rapiers is derived initially either from a linkage mechanism or from a cam. 4.The rigid rapier is driven from the centre and has a rapier head at each5.In gabler system of weft insertion the rapier system is combined with air jet picking system.

Features of Rapier Loom:

Features of Air Jet Loom: 

1.Air jet weaving machine is high speed machine having good quality2.For instance on a weaving machine having a speed of 600 rpm the weaving cycle is 100m/s.3.Cam control valves have the advantages of high speed precision of action whilst the electrically controlled solenoid valves permit easy setting.4.Finer count of yarn is used as the weft thread to produce fency type of fabric.

Scope of Water Jet Loom:

•Weft and warp yarn must be insensitive .i.e hydrophobic in nature.•Weaving of the water attractive fabric is not possible by the water jet loom,•Thermoplastic yarns offer the advantages of severance of weft by a heated blade and the provision of a heat selvedge by fusing.•It has required miniature pump to feed water under pressure to the nozzle

Features of Multiphase Loom:

1.A multi-phase loom with magnetic shuttle features that the spiral reed blade with shuttle path is used for beating-up.2.The linear motor is used for wefting, the heald wheel or electromagnetically excited heald needle is used for opening, and the weft opening with off-line multi-path asynchronous weft replenishing is used.3.Its advantages include high efficiency, high speed and low weaving cost.4.The multiphase loom can form many different sheds at different places, thereby enabling insertion of number of filling yarns, one behind the other.

Weft Insertion Rates of Different Type of Looms:

Loom                                                    Weft Insertion Rate Conventional Powerloom                  -            200 Mts / Min High Speed Automatic Loom            -            300 - 400 Mts / Min Rapier Loom                                      -            1000 - 1400 Mts / Min Projectile Loom                                 -            1200 - 1500 Mts / Min Air Jet Loom                                    -            1500 - 2000 Mts / Min Multiphase Loom                             -            5000 Mts / Min

Today the market particularly demands wide variety as much as possible at the lowest possible cost.

Productivity: The production rates of the various types of looms are presented for comparison in following Table

Loom Type Available width in cm Speed in rpm

Conventional Power loom 180 180

Projectile    

STB Russia 180-330 300

Rigid Rapier    

GUNNE 230 330

Flexible Rapier    

Somet 165-410 550

Water Jet    

Metor SPA 230 1000

Nisson 150-210 1000

Air Jet    

Sulzer Ruti upto 300 750

Picanol Omni 190-380 800

Picanol Delta 190 1100

Linear Multiphase    

Elitex About 190 1100-1600

Drum type Multiphase    

Sulzer M8300 190 3230

Thank You