SUBMITTED TO : ISRATH JERIN

SUBMITTED BY: NAME ID

MIRZA MD. GOLAM SARWAR 2010200400013

MD. JOHURUL ISLAM 2010200400022

MD. RAYHAN MOSTOFFA 2010200400024

Jet Dyeing Machines

A machine used for dyeing of fabric in rope form

Mainly used for dyeing of polyester using disperse dye.

It is similar to winch dyeing and fabric is processed in continuous loop.The technique is especially useful for delicate polyester fabrics but depending on the machine almost any weight, structure, or fabric type can be used.

INTRODUCTION

Jet dyeing machines came into existence with a purpose to minimize or eliminate the drawbacks of earlier machines like winch , jigger and beam dyeing units.

To know about the maintenance of the machine

To know about the mechanism of the machine

To know the dyeing procedures

OBJECTS

1. Dyeing time is short compare to beam dyeing

2.Production is high compare to beam dyeing machine.

3. Low consumption of water

4.Short dyeing time

5.Can be easily operated at high temperatures and pressure.6. Comparatively low liquor ratios, typically ranges between 1:4 and 1:20

7.Fabrics are handled carefully and gently.

Advantages

1.dyed in rope form so there is a risk of entanglement

2.Equipment and maintenance costs are high

5.foaming can be a problem

3.some fabric may be abraded in the process

4.Chance for crease formation

Disadvantages

Autoclave

Drain valve

Winch roller

Nozzle

Reserve Tank

Heat Exchanger Steam pipe

Dyeing tank

MAIM PARTS

1. Over flow dyeing machines

2. Soft flow dyeing machines

3. Air flow dyeing machines.

Types of Jet Dyeing Machines

Types of Jet Dyeing Machines

DYEING PROCESS

In the Jet dyeing machine the reel is completely eliminated. A closed tubular system exists where the fabric is placed. For transporting the fabric through the tube a jet of dye liquor is supplied through a venture. The Jet creates turbulence. This helps in dye penetration along with preventing the fabric from touching the walls of the tube. As the fabric is often exposed to comparatively higher concentrations of liquor within the transport tube, so little dye bath is needed in the bottom of the vessel. This is just enough for the smooth movement from rear to front. Aqueous jet dyeing machines generally employs a driven winch reel along with a jet nozzle.

Chemicals added

AcidsBuffers

Sequestering agent Anticreasing

agent Defoamers

Levelling agent

1. Dyestuffs & auxiliaries feeding container

3. Pump for the circulation of the liquor

2. Heat Exchanger

4. High pressure pipework

5. Dyeing drum

6. Winch roller

Jet Dyeing Machines

Jet Dyeing Machines(inside view ) Jet Dyeing Machines(inside view )

Jet Dyeing m/c Outer view

Jet dyeing machine Horizontal

Storage tank

Main Pump

Dosing tankfabric

Heat Exchangers

Nozzle

Jet Dyeing Machines

SAMPLE DYEING MACHINE TYPE : JET

Both material and liquor is moving

Dyeing in rope form

Fabric speed usually 200-250 m/min

jet dyeing can usually operated up to 1400c under high pressure

capacity capable of dyeing 100 to 150 kg of fabric at a time

Features

Schematic diagram of Jet Dyeing Machines

MACHINERY PROCESS

1.The solution is filled in the dye tank and it reaches the heat exchanger where solution can be heated which then pass onto the centrifugal pump and then to the filter chamber.

2.The solution will be filtered and reaches the tubular chamber. Here the material to dye will be loaded and the winch is rotated so that the material is also rotated.

3.Again the dye liquor reaches the heat exchanger and operation is repeated for 20-30 minute at 135°C.

4.Then dye bath is cooled down, after material is taken out.

Controlling point

Motor rpm: Motor rpm should check to maintain the proper revolution as we need.

Proper movement of roller: Every free roller should move freely as required . We need to ensure the free movement of these rollers.

Proper concentration: Without even concentration the dyeing will not give even shade. So we have to look at proper concentration of the dye bath.Temperature maintain: We have to maintain proper temperature of dye bath by steam or other utilities. So it should be maintained

Activate the valves: Different valves should be active properly. So we have to inspect them to prevent failure.

Controlling point

Proper guide & tension: The guide roller & tension roller are bound to give proper guide & tension

Proper movement of winch: Winch should move freely. So we have to inspect it

Roller movement : different roller like feed roller , let off roller etc. should move smoothly as required

Maintenance Schedule

SL. NO. Maintenance Work Time Interval01 Steam pressure regulator checking Every hour02 Cleaning of the roller Every batch unloaded03 Checking the water pipe Everyday 04 Checking the motor & electric

connection weekly

05 Greasing & oiling in roller bearings & gears

weekly

06 Cleaning the steam inlet &outlet pipe

weekly

07 Checking the bowl Every hour

08 Checking the efficiency of fabric tension roller

Every hour

09 Checking the inlet &outlet valves Everyday

DEVELOPMENT IN JET DYEING MACHINE

1.Soft flow jet- slow motion of fabric. Suitable for knitted fabric

2.Super jet dyeing machine- M:L is 1:1

3.Aerodynamic jet dyeing machine

4.Jet created by mixture of air + water

5.M:L is 1:1 , drain out at a 130c

6.Multi-nozzle sot flow jet dyeing machine

2.Limited accessibility during the dyeing process.

1.High initial investment and maintenance cost.

4.In case cloth breakage, re-threading is complicated.

3.Foam forming substance is to be avoided

LIMITATIONS OF JET DYEING MACHINE

All

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