Yarn Dyeing machines
Hank yarn dyeing has been done traditionally for a very long time in many parts of the world. But now is the right time for chemical processors to look for cutting-edge techniques for dying hank yarn while keeping the following in mind.
(i) Customer preference
(ii) Economy
(iii) Environment protection
(iv) Ease of operation/repeatability of shade
Yarn dyeing can be done by the following three methods.
(ii) Non-mechanised
(iii) Mechanised (partially or completely)
Among the mechanised method of dyeing the following machines are used successfully for dyeing hank yarns.
(a) Open beck type
(b) Cabinet type
(c) Package dyeing
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| Dyed yarn hank |
Yarn package dyeing machine
Yarns are frequently twisted into packages, like cones, bobbins, or cheeses. Large quantities of yarns of all kinds are typically scourged, bleached, and dyed PRN while in wound package shapes.
There are several circulating machines for this, but they're all built using identical basic ideas and styles.
These devices often have an exterior vessel which will use harassed to carry the scouring, bleaching, or dyeing fluids.
The yarn packets are placed on a frame or page that has several perforated tubes connected to a central hollow casing
On these perforated tubes, the wound yarn packets are stacked one on top of the opposite to completely encapsulate them, leaving no gaps in between.
The outer container's cover is then firmly fastened in place
The scouring, bleaching, or dye liquor that must be circulated is far away from the outer container employing a liquor pump, forced up the tubes through their perforations, and then forced through the yarn bundles before being returned to the outer liquor container.
This flow orientation is referred described as being "inside-out." The flow of the alcohol may occasionally be automatically reversed or it's going to always fall in the same direction.
When something is automatically reversed, it first flows "outside-in" for a predetermined amount of your time, then reverses direction to flow "inside-out" for a predetermined amount of your time, and so on.
The principle of operation of the reversing mechanism, which is situated beneath the first dyeing vessel, is clearly illustrated in the Figure below.
The majority of dyeing equipment for yarn bundles is vertical and may be loaded or unloaded using an overhead hoist.
Figure following figure depicts a package dyeing machine's essential components.
Typically, package dyeing machines may operate at an MLR of about 1:10 Low alcohol machines are now accessible as well.
Other advancements include pre-programmable machines that enable any predefined dyeing cycle to be completed automatically, as well as rapid dyeing machines designed specifically for quickly dyeing polyester yarn packages.
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| Dyed yarn Package |
Questions -
- How yarn dyeing machine works?
- What are the types of yarn dyeing machines?
- Describe the yarn package dyeing machine.
References
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