Jet dyeing machines are used to dye fabric in rope form, primarily polyester using disperse dyes. The fabric moves continuously in a loop through the machine, similar to winch dyeing. Jet dyeing machines aim to minimize drawbacks of earlier machines like winch and beam dyeing. Dyeing time is short, production is high, and water and dye liquor consumption is low compared to other machines. The jet of dye liquor creates turbulence to aid dye penetration while gently handling the fabric. Main parts include a dyeing tank, winch roller, nozzle, and heat exchanger. The dyeing process involves placing fabric in a closed tubular system and using a jet of dye liquor to transport the fabric through while

1. SUBMITTED TO :
ISRATH JERIN
SUBMITTED BY:
NAME ID
MIRZA MD. GOLAM SARWAR 2010200400013
MD. JOHURUL ISLAM 2010200400022
MD. RAYHAN MOSTOFFA 2010200400024
Jet Dyeing Machines

2. 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.

3. To know about the maintenance of the machine
To know about the mechanism of the machine
To know the dyeing procedures
OBJECTS

4. 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

5. 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

6. Autoclave
Drain valve
Winch roller
Nozzle
Reserve Tank
Heat Exchanger Steam pipe
Dyeing tank
MAIM PARTS

7. 1. Over flow dyeing machines
2. Soft flow dyeing machines
3. Air flow dyeing machines.
Types of Jet Dyeing Machines

8. Types of Jet Dyeing Machines

9. 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.

10. Chemicals added
Acids
Buffers
Sequestering
agent Anticreasing
agent
Defoamers
Levelling agent

11. 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

12. Jet Dyeing Machines(inside view )
Jet Dyeing Machines(inside view )

13. Jet Dyeing m/c Outer view

14. Jet dyeing machine Horizontal

15. Storage tank
Main Pump
Dosing tankfabric
Heat
Exchangers
Jet Dyeing Machines

16. SAMPLE DYEING MACHINETYPE : JET

17. 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

18. Schematic diagram of Jet Dyeing Machines

19. 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.

20. 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.

21. 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

22. Maintenance Schedule
SL. NO. Maintenance Work Time Interval
01 Steam pressure regulator checking Every hour
02 Cleaning of the roller Every batch unloaded
03 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 Every hour

23. 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

24. 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

25. All
Thanks For