Description of Beam Dyeing Machines

Beam Dyeing Machine:

A machine for dyeing yarns or fabrics that have been wound onto a special beam that has evenly perforated holes along its barrel. The dye is forced through the barrel into the yarn/fabric from inside to outside and vice versa. The beam dyeing machines may be capable of dyeing a single beam or to dye multiple beams. The fabric or yarn have better dyeing results because of there is no dimensional changes as well as there is no mechanical force applied to it. The high performance pumps circulate the dye liquor in efficient manner to achieve even dyeing results.

Working Principle of Beam Dyeing Machines
The working principle is same as that of HTHP yarn dyeing machines. The process of beam dyeing is as follows,

1. The fabric or yarn in open width is rolled on to a perforated beam.
2. The beam then subsequently inserted into a dyeing vessel.
3. The machine is closed and pressurized.
4. The dye liquor is circulated in to out and out to in directions , under pressure and temperature is employed as per the process requirement.
5. The chemicals and auxiliary are injected as per requirement of the process.

A Thies Beam Dyeing machine

A Thies Beam Winding Machine

Hank Dyeing Machines | Process Flow Chart of Hank Processing

Processing of Yarn in Hank Form:

Why hank dyeing?
Although package dyeing route is much simple and easy to follow for dyeing of different kinds of yarn,but still the hank route is popular for certain qualities, there are two reasons for this,

1.The quality and nature of the product does not allow to follow package route.
2.The package route is non practical and non economical.

Product Quality

Certain kinds of yarns which are so delicate that their physical properties such as strength appearance,texture and construction can not be retained while following the package route in which yarn is processed under stretched conditions at elevated temperatures. The examples of such products are natural silk, viscose rayon., voluminous yarns, High bulk acrylic , shrink resist treated wool and its blends. Cashmere ,its blends with wool and nylon ,nylon and hand knitting yarns of different fancy constructions.

Economy of Process
In case of mercerized cotton yarns , the yarn mercerizing is done in the hank form and material has to be neutralized before dyeing ,therefore it is not economical to convert these hanks to packages for dyeing.

Process sequence for yarn dyeing in hank form

1.Singeing(for mercerized cotton yarns)
2.Reeling
3.Mercerization (for mercerized cotton yarns)
4. Dyeing
5.Hydro extraction or squeezing
6.Drying
7.Hank to cone wiinding

Process Flow Chart of Hank Processing

Process Flow Chart of Hank processing

Process Flow Chart of Hank processing

Dyeing in Hank Form

Type of different Hank dyeing machines
1.Roller hank Dyeing machines
2.Cabinet Dyeing Machines
3.Spray Dyeing Machines
4.Vertical Kier Machines

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