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  Beam Dyeing Machine, Chemistry tutorial

Introduction

There is no dirt in the kind of Textile dyeing machinery, which is obtainable these days to a modern dyeing house. Most of such machinery utilizes latest advancement in the dyeing technology to provide elevated capacity dyeing along through consistency and smooth terminates. For our convenience, we have enumerated below several of the popular categories of dyeing machines  even though no claim is made here that this list is entirely exhaustive.

Definitions

There are still several more competent dyeing procedures that are highlighted below:

Beam dyeing machine

The beam dyeing machine activates through the similar principle as that of package dyeing machine. It can be efficiently utilized to dye yarn or fabric. The procedure works as this: fabric or yarn in release width is rolled on to a perforated beam. The beam then consequently slid into a vessel that is sealed and pressurized. The colour impregnates the fabric as the dye liquor is permitted to go on circulating through the perforations in the beam. Usually the beam machines are designed in these a manner so as to hold a single beam or several beams in a batch.

Batch dyeing

Features of Beam Dyeing Machine

a. Able to adjust water level in accordance to fabric volume.

b. Even dyeing and superior dyeing quality.

c. Optimized circulation system along with high performance pumps.

Advantages of Beam Dyeing Machine

i. The fabric is put under controlled tension, and is wound on to a perforated beam. This consequence in removal of creases from the fabric. It as well ensures total manage of dimensions of the roll of fabric.

ii. The fabric is held in a attached position during the procedure of dyeing. This in fact means that there is no application of mechanical action on to the fabric. As revealed in the figure, there is no movement of the fabric as the hydrostatic pressure of the pump forces the dye liquor throughout the fabric roll.

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Fig: Schematic Diagram of a Beam Dyeing Machine  

Hank dyeing machine

Hank dyeing machine is mostly utilized for dyeing of patterned wool carpets. There are largely four kinds of Hank Dyeing machines employed. They are the subsequent: single stick Hussong-Type Machines, the double-stick machine, double-stick cabinet machine, and finally circular carrier machine. Out of this four, the 1st category of Hussong-Type Machines is the most popular one.

In the Hussong type devices, a hank requires to be hung on removable sticks, from the underside of the dyeing vessel lid. The lid is then vertically lowered onto the dyeing vessel. The dyeing vessel consists of simple box that has a perforated false bottom. A reversible impeller, which is positioned vertically in a weir chamber at one corner of the machine, is utilized for circulating liquor. Heat is generated via closed steam coils located beneath the false bottom. Whilst on the smaller machines heat is produced through live steam injection.

Features of Hank Dyeing Machine

a. Temperature control is completed via electro-mechanical or programmable logic controllers.

b. Machine capacities can range from 10 kg sample machines -1 ton machines.

c. Yarn loads up to 4000 kg can be dyed through coupling mutually of machines.

d. Typical liquor ratios are 1:15 to 1:25.

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Fig: Schematic Diagram of a Hank Dyeing Machine

Jig dyeing machine

A Jig Dyeing machine is an efficient dyeing technique. It is as well recognized through the name of jigger. Jig Dyeing machine procedures fabrics in open width to avoid creasing difficulties in fabric dyeing. The procedure works like this. The Jig Dyeing machine activates via transferring the fabric back and forth. This takes place from roller to roller via the medium of a dye bath that is placed at the base of the machine. As soon as the 2nd roller gets full, the direction of association of fabric can be repealed. In Jig dyeing, the duration of the procedure is computed on the basis of the number of passages or finishes of the fabric passing through the dye bath from roller to roller. The end in dyeing parlance is identified as the passing of fabric through dye liquor from one roller to the other.

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Fig: Some Features of a Jig Dyeing Machine

Types of Jig Dyeing Machine

a. 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.

b. 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 as well assists in having a close control of the dyeing temperature. Typically it is applied for dyeing synthetic fibres.

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