WELCOME TOTHIS PRESENTATIONMd. Abdullah-Al-MasudID : 141-23-3760

TOPICDIFFERENCE BETWEENCONVENTIONAL LOOM & MODERN LOOM

TOPIC

Loom:Conventional loom

Loom:

Loom is a mechanical device which interweaves warp and weft yarns into fabric, that’s fabrics are suitable for use as dress or industrial uses.

Classification of loom Loom can be classified into two classes:

1.Conventional loom2.modern loom

Conventional loom

Modern loom

Hand loom A hand loom is a loom that is manually operated,

unlike motorized or electrically powered looms. It is an apparatus on which weavers create fabric by interlacing the warp and weft threads.

The handloom was invented about 2,000 years ago and was brought to England by the Romans.

Advantages and disadvantages of hand loom Advantages: Hand loom is more economical. Easy to operate. Suitable for low scale production type industry. Separate parts are available in market.

Disadvantages: Causes more noise in the work field. Shuttle cause abrasion on warp yarn which increase wastage

percentage. Warp break increases for shuttle. Lower production rate then shuttle less loom.

Rapier Loom (Modern)

RAPIER LOOM Rapier loom is a shuttleless weaving loom in

which the filling yarn is carried through the shed of warp yarns to the other side of the loom by finger like carriers called rapiers.

RAPIER

It is the main part of rapier loom It is used insted of shuttle

Shattle

Exit Gripper

Enter Gripper

Picking Mechanism The rapier head on creel side

picks up yarn from designated cone and is carried towards centre of warp shed by the rod.

Simultaneously the matching rapier head from opposite side moves in, as shown in the central diagram.

The picking cycle is completed when both rapiers retreat to their original position.

Single Rapier Double Rapier

Air Jet Loom

What is air jet loom

 Air jet weaving loom is that, at which jet of air is used to propel the weft yarn through the shed at a speed of up to 600 ppm.

Advantage and Disadvantage

Advantage o Multicolor weft inserting o Automatic pick repairing o Heavier yarns are suitable for air jet looms

Disadvantageo Power consumption dew to compressed airo Lighter fabrics are very difficult to control through shedo Too heavy yarns also can't be carried across the loom by air jet

Weaving system

The air jet weaving machine are supplied with compressed air maintained from central source

The preparation of the air before its distribution of the air to the individual weaving machine through a valve system

• Filtering • Compressing • Cooling • Drying • Air tank

Water Jet Loom

Water Jet Loom

A water Jet is the machine for weaving cloth (loom) which use a Jet of Water to insert the weft (crosswise threads) into the warp (length wise threads) The force of air water carriers the yarn from one side to the other.

Advantage

High Efficiency Low Drag and Shallow Draught Smooth and Quiet Total Safety

The water jet picking system of The weft insertion on a water jet weaving machine in divided

into three phases .

a. Acceleration of the water in the pump prior to its injection into the nozzle.

b. Jet outlet from the nozzle c. Flow in the free environment different form

o Compacto Splito atomized

Projectile Loom

Projectile Loom It is sometimes called missile loom as the picking

action is done by a series of small bullet like projectiles which hold the weft yarn and carry it through the shed and then return empty.

Method

The method of moving the reed and the projectile track  differs from a conventional automatic loom mainly in two respects.

The method of insertion of weft into the warp shed The method of moving the reed and the projectile

track

Advantages of Projectile Loom

Two or three cloths can be woven simultaneously. It is possible to achieve weaving performances with

breakage rate per square meter of cloth. 50% of the number of breaks that would occur on a conventional loom

Since the projectile is passing through guides there is no reed to projectile or projectile to yarn contact.

Onventional vs Modern loom

Conventional loom Low running speed. Comparatively lower production capacity. Simple design can be produced. Driven manually. Initial investment is comparatively lower. Shedding, picking & beating up is done automatically. Shuttle loom. Higher warp shed need. Less number of design variety can be produced. Safety system is not properly improved.

Modern Loom High running speed. Higher production capacity. Complex design can be produced. Driven by electric power. Initial investment is high. Shedding, picking & beating up is done automatically. Shuttle less loom. Lower warp shed needed. More number of design variety can be produced. Safety system is improved.

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