Jet Dyeing Machine
Jet Dyeing Machine
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 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.
The following diagram explains the functioning of a Jet dyeing machine:
In deciding the type of dyeing machine the following features are generally taken into consideration for differentiating. They are the following. Shape of the area where the fabric is stored i.e. long shaped machine or J-box compact machine. Type of the nozzle along with its specific positioning i.e. above or below the bath level. Depending more or less in this criteria for differentiation following types of Jet Machines can be said to be as developments of the conventional jet dyeing machine.
The Jet Dyeing Machine offers the following striking advantages that makes them suitable for fabrics like polyesters.
· 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
Jig Dyeing Machine
A Jig Dyeing machine, is an efficient dyeing technique. It is also known by the name of jigger. Jig Dyeing machine processes fabrics in open width to avoid creasing problems in fabric dyeing. The process works like this. The Jig Dyeing machine operates by transferring the fabric back and forth. This happens from roller to roller via the medium of a dyebath, that is located at the base of the machine. As soon as the second roller gets full, the direction of movement of fabric can be reversed. In Jig dyeing, the duration of the process is measured on the basis of the number of passages or ends of the fabric passing through the dye bath from roller to roller. The end in dyeing parlance is known as the passing of fabric through a dye liquor from one roller to the other one.
· Atmospheric Jigs- Atmospheric jigs operate at atmospheric temperatures and pressures. These machines are applied for natural fibres. Here the temperature limit is typically 1000. Centigrade.
· High Temperature Jigs- A high temperature jig functions in the same way as an atmospheric jig but comes with the addition of a pressure vessel that is designed to function at 1300C. The pressure vessel also helps in having a close control of the dyeing temperature. Typically it is applied for dyeing synthetic fibres.
Latest in Jig Dyeing Machines
The image shows a fully computer controlled normal temperature and pressure Jig dyeing machine Features
· Operates by electricity, and fully controlled by a PLC
· Cutting edge technology in the form of speed measuring device on foot roll barrel. This helps in maintaining uniform line speed along with a reliable testing signal.
· Comes with built in dye solution circulatory system and charging system.
· Use of latest technologies in the form of automatic:
o Reverse
o Way-change
o Length Count
o Temperature Control
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Winch Dyeing Machine
Winch dyeing machines comes with the lucrative options of low cost design, simplicity in operation and maintenenace yet uncompromising features when it comes to versatility.
Mostly woollen fabrics are dyed by using Winch Dyeing machine. The dyeing machine derives its name "Winch" as the fabric rope gets circulated in the machine by way of a mechanical action of a horizontal rotor or reel, called as a winch or sometimes wince. The cross-section of the winch rotor may be circular or elliptical.
As shown in the diagram below, the winch dyeing machine has a front compartment, a perforated partition separates it from the main dyeing chamber. It is this front compartment where dyestuff and dyeing auxiliary additions are made. Gradually they move to main dyeing vessel from there. The process works like this first a series of fabric ropes are immersed in the dye bath. This fabric ropes must be of equal lengths. A part of each rope is then taken over two reels or over the winch itself. In the subsequent course of dyeing operation a rope of fabric is circulated through the dye bath and the winch. The dyestuff and auxiliaries are dosed manually or automatically according to the recipe method.
Mostly woollen fabrics are dyed by using Winch Dyeing machine. The dyeing machine derives its name "Winch" as the fabric rope gets circulated in the machine by way of a mechanical action of a horizontal rotor or reel, called as a winch or sometimes wince. The cross-section of the winch rotor may be circular or elliptical.
As shown in the diagram below, the winch dyeing machine has a front compartment, a perforated partition separates it from the main dyeing chamber. It is this front compartment where dyestuff and dyeing auxiliary additions are made. Gradually they move to main dyeing vessel from there. The process works like this first a series of fabric ropes are immersed in the dye bath. This fabric ropes must be of equal lengths. A part of each rope is then taken over two reels or over the winch itself. In the subsequent course of dyeing operation a rope of fabric is circulated through the dye bath and the winch. The dyestuff and auxiliaries are dosed manually or automatically according to the recipe method.
Model of a Vertical Winch Dyeing Machine
Technical features:
· Nozzle system that gives high liquor flow that ensures a smooth process
· Savings in utility consumption and reduction in the production cost
· Can scour, bleach and dye various kind of fabrics Ï Ease of operation and maintenance
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