Working Principle of Overflow Jet Dyeing Machine

Overflow Jet Dyeing Machine

Overflow Jet  dyeing machine is used for pre-treatment and dyeing of rope fabrics, with both liquor and materials moving; the architecture and the design of the system and the liquor ratios are similar to the jet machine ones. The main difference is the fabric transport system, driven partly by a motorized reel, and partly by the sequential flow of the liquor. The jet system nozzle, based on a Venturi tube, is replaced by a vessel containing the liquor; the liquor enters the straight pipe section and then flows through the transport channel, together with the fabric rope.

Overflow Jet Dyeing Machine

This Machines are designed for use in delicate knitted and woven fabrics that are made up of natural as well as synthetic fibers. They are also extensively used in the production of carpets. The main difference between jet and overflows jet machines is that in jet machines the fabric gets transported by a bath that flows at high speed through the nozzle, while in Overflow Dyeing Machine it is the gravitational force of the liquor overflow that is responsible for fabric transportation.

Parts of Overflow Jet Dyeing Machines

Working Principle of Jet Overflow Dyeing Machine

A typical Overflow Jet Dyeing Machine works like this. A winch that is not motor driven usually is located in the top side of the machine where the fabric is hanged. A longer length of textile is made to hang from the exit side of the winch as compared to the inlet side. By applying the force of gravitation the longer length of textile is pulled downward more strongly than the shorter one. Consequently the fabric is soaked in the bath without any sort of tension. The following diagram well illustrates the working process.

Schematic diagram of Overflow Jet Dyeing Machines

Technical Parameters of Overflow Jet Dyeing Machine:Advantages of Overflow Jet Dyeing Machine

• No evaporation losses– As the dyeing vessel is closed, there is no evaporation losses stemming from the dye bath. Further, depending on the situation the temperature may be raised to more than 100 Degree C.

• No build up of steam condensate in the dye bath– The latest technology implies that the dyebath gets heated by a heat transducer which is steam driven. This technology apart from being very efficient ensures that there is no build up of steam condensate in the dyebath.

• Low liquor ratios– Dyeing is conducted at relatively low liquor ratios, e.g. 10:1 and may be lesser resulting in substantial savings in water and energy.

• Excellent dye liquor contact– Excellent dye liquor contact with the fabric rope results in better and more improved level dyeings.

• Computer control– The machines are operated by computer and hence, operator error is eliminated.