JET DYEING MACHINE

Prepared By : Mazadul Hasan sheshirID: 201000040000813th Batch (session 2009-2013)Department : Wet Processing Technology Email: mazadulhasan@yahoo.comBlog : www. Textilelab.blogspot.com (visit)

Southeast University Department Of Textile Engineering

I/A 251,252 Tejgaon Dhaka Bangladesh

Prepared By :

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Jet dye machine is the most modern machine 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

It was found that in using Winch machines, there were some inherent problems. So the Jet dyeing machines when they came up in the 1970's, were specifically designed to overcome those shortcomings.

In this machine the dye tank contains disperse dye, dispersing agent, leveling agent and acetic acid. Fabric may be jet dyed by placing it in a heated tube or column where jets of dye solution are forced through it at pressure up to 300 pounds per jet.

Piece Jet Dyeing

1. Dyeing is done in a closed, tube-like system in which the fabric passes through a fast moving stream of pressurized dye liquor.

2. It is primarily used for fabrics prone to felting.

1. It was found that in using Winch machines, there were some inherent problems. So the Jet dyeing machines when they came up in the 1970's, were specifically designed to overcome those shortcomings.

2. In the Jet dyeing machine the reel is completely eliminated. A closed tubular system exists where the fabric is placed.

3. For transporting the fabric through the tube a jet of dye liquor is supplied through a venturi. The Jet creates turbulence. This helps in dye penetration along with preventing the fabric from touching the walls of the tube.

4. 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.

5. This is just enough for the smooth movement from rear to front.

6. Aqueous jet dyeing machines generally employs a driven winch reel along with a jet nozzle.

Jet Dyeing Machine

Types of Textile Dyeing Machineries:

1. Hank Dyeing Machine

2. Package Dyeing Machine

3. Beam Dyeing Machine

4. Jet Dyeing Machine

5. Jig Dyeing Machine

6. Paddle Dyeing Machine

7. Winch Dyeing Machine

8. Sample Dyeing Machine

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 venturi. 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.

DYEING PROCESS

• 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.

• 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.

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

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

MACHINERY PROCESS

• This machine can be operated at high temperature and pressure .

• This system operate at low liquor ratio (ratio of mass of dye bath to mass of fabric in dyeing machine) so, this operation consume less water and chemical.

• Frequent movement of fabric round the jet through the machine reduces the tendency of crease formations.

SPECIAL FEATURES AND APPLICATION

FLOW DIAGRAM

LIQUOR CIRCULATION PATH- MOTOR , VALVE ,HE, RESERVE TANK

Main Pump

Heat Exchanger

Lint Filter

Doing Tank

Pneumatic Valve

Unload Motor

Drain Line

Water Label

Nozzle AirFlow

Dosing Pump

Dye Bath Chamber

• After incest fating the dyeing results under different conditions

such as development of new fiber blends, different

construction fabrics, interaction position of jet, quantity of the

dye liquor to be present in around the fabric and the type of

impact of the dye liquor on the fabric in the jet area.

Some Jet dye machines are as follows:

• Overflow Dyeing Machine

• Soft-flow Dyeing Machine

• Airflow Dyeing Machine

TYPES OF JET DYEING MACHINE

Types of Jet dyeing m/c

• Dyeing time is short compare to beam dyeing• Production is high compare to beam dyeing machine.• Low consumption of water.• Short dyeing time.• Can be easily operated at high temperatures and

pressure.• Comparatively low liquor ratios, typically ranges

between 1:4 and 1:20.• Fabrics are handled carefully and gently.

ADVANTAGES OF JET DYEING MACHINE

• Cloth is dyed in rope form so there is a risk of entanglement and chance for crease formation.

• Equipment and maintenance costs are high, foaming can be a problem, and some fabric may be abraded in the process.

• Chance for crease formation.

DISADVANTAGES OF JET DYEING MACHINE

• High initial investment and maintenance cost.

• Limited accessibility during the dyeing process.

• Foam forming substance is to be avoided.

• Any roughness of the inside surface cause damage to cloth.

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

LIMITATIONS OF JET DYEING MACHINE

1. Main Vessel or Chamber2. Winch roller or Reel3. Heat Exchanger4. Nozzle5. Reserve Tank6. Chemical dosing tank7. Utility lines i.e. water line, drain line, steam inlet etc.8. Controlling unit or Processor9. Fabric Plaiter10. Different types of motors & Valves

Main Parts of Dyeing Machine:

Main Pump

Mechanism Of a Nozzle

Dye Liquor Entry path

Knit Fabrics

Machine Setup

Overflow Dyeing Machine

Storage tank

Main Pump

Dosing tank

fabric

Heat Exchangers

Jet dyeing machine Horizontal

Technical Parameters :

ITEMS SME-150B Form of the machine Horizontal tubular jet overflow single

pipe

Liquor Ratio 1:5---1:8 Max Fabric Capacity

(kg ) 100-150

Max WorkingTemperature

14 0

Max Working Pressure(Mpa )

0.40Mpa

Fabric Speed (m/min) 60-300 Heating Exchanging Area ( ) 5

Main Pump Power(KW )

14.7

Autoclave: In horizontal and conical construction equipped with a port and cover for

the fabric loading in the front. The group and polished reel and separator are located

inside the autoclave is pressurised by compressed air. Pressure guage and necessary

safety values are provided.

Main dia of the autoclave : 600 mm

straight part of the autoclave : 7000 mm

Flow Tubes: Flow tubes are made of stainless steel and are highly polished and

connected to the autoclave. Necessary flow control valves and by pass valves for the

fine adjustments of flow quantity are provided.

Main liquor circulation pump: For the liquor circulation and fabric movements and

efficient centrifugal pump made of stainless steel is provided. The pump is driven by

directly coupled to fully enclose two pole induction motor of 20 H.P.

H.T.H.P. RAPID JET DYEING MACHINE - Consist of:

Heat Exchanger: Heat exchanger is made from stainless steel. The heat exchanger is of shell and tube type construction and is entirely mode of stainless. The heat exchanger is suitable for raising temperature of the dye liquor from 30'C to 130'C at a steam pressure of 4.0 Kgs./cm2. The heat exchanger is suitable for cooling down the dye liquor from 1.3'C to 8O'C.

Reserve Tank: One reserve tank made of stainless steel is provided outside the high pressure circuits for the preparation to dyestuff and chemicals.

Miscellaneous : •One filter for the heat exchanger.•One lamp is provided on the top of the autoclave for efficiently illuminating the inside of the autoclave.

Draw Reel: One draw reel with necessary drive is provided on the front top of the autoclave near the cover suitable for loading and unloading of the autoclave.

H.T.H.P. RAPID JET DYEING MACHINE - Consist of:

Control panel: The following controls are provided.

Temperature indicator and automatic temperature controlling instruments. On/of swatches for the operation of pumps and other control. Indicating lamps etc. Pneumatic circuits controls.

Nozzle: One No. Jet Nozzle will be supplied with the machine.

Scope of supply : One autoclave complete with all the internal pipelines. valves, foundation

block and other such parts necessary for normal operation. One control panel as above. One draw reel as above.

H.T.H.P. RAPID JET DYEING MACHINE - Consist of:

TYPE : JET

SAMPLE DYEING MACHINE

eco88_start

HI TECH TURBO JET DYEING MACHINE

Soft-flow Dyeing Machine

Soft Flow Dyeing Machine, which ensures even dyeing with low tension and accurate rinsing system. Fabricated as per international quality norms, this device is widely appreciated for hosts of outstanding features like trouble free service life, optimum functionality and energy efficiency.

Soft Flow Dyeing Machine

Heat Exchanger

Storage Tank

Control Panel

Main PumpDosing Pump

Steam valve Nozzle

BACK VIEW OF A DYEING MACHINE

Dosing Pump

PT TANK

Bath

Main Pump

Heat Exchanger

Drain

Dosing Line

Nozzle

Steam valve

Jet Dyeing m/c (inside view)

Jet Nozzle

Air-flow Dyeing Machine

This is another development of the very popular jet dyeing machines. The

main difference between the Air Flow Machine and Jet Dyeing machine is

that the airflow machine utilizes an air jet instead of the water jet for

keeping the fabric in circulation. Typically the fabric is allowed to pass into

the storage area that has a very small amount of free liquor. This results in

a reduction in consumption of water, energy and chemicals. The figure

below shows how in an Airflow Machine the bath level is always under the

level of the processed textile. Here the fabric does not remain in touch

with the liquor (the bath used is below the basket that holds the fabric in

circulation). This invariably means that the bath conditions can be altered

without having any impact on the process phase of the substrate.

Airflow Dyeing Machine

Discontinuous processing of textile substrates require more water and energy compared to continuous processes. However, for a long time efforts are undertaken to optimise discontinuous processes with respect to productivity, efficiency and also to minimise energy and water consumption respectively. This lead to dyeing jets. Thereby liquor ratios have been reduced step by step. The latest developments have LR of 1:3 (for woven PES fabric) and 1:4.5 (for woven CO fabric). To achieve such low LR, within the machine (jet), the fabric is moved by moisturised air or a mixture of steam and air only (no liquid) along with a winch. The prepared solutions of dyestuffs, auxiliaries and basic chemicals are injected into the gas stream. The bath level is always below the level of processed textiles in order to maintain low LR. The principle of such an airflow dyeing machine is illustrated. Rinsing is carried in a continuous manner. During the whole rinsing process, the bottom valve is open and rinsing water is discharged without additional contact with the fabric (which is the case in conventional machines) This also allows the discharge of hot bath liquors, also after high-temperature dyeing at 130°C. Thus, in addition to time saving, optimum heat recovery can be performed. The fabric itself is processed with low tension and crease formation is minimised.

Description

XDWG 225, 450, 675, 900, 1350

Fig. 3: THEN-AIRFLOW® SYNERGY G2.

Overflow Jet Dyeing Machine

Soft flow Jet Dyeing Machine Winch Dyeing Machine

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