From Sliver To Yarn – The Complete Yarn Spinning Process You Need to Know

1. PARTNERSCAREERSCONTACT US   EN     Solu?on  Events Innova?on  About Us  Resources  Blog FOLLOW US ON FACEBOOK Home » Spinning Can » From Sliver To Yarn – The Complete Yarn Spinning Process You Need to Know JUMAC Sliver Cans RECENT POSTS E?ects of Sliver Handling On Qual? of Sliver and Yarn Jumac Receives Phenomenal Response at ITMA 2023 Jumac at ITMA 2023 – What to Expect? E?ects of Defec?ve Spinning Cans on the Performance of Spinning Machinery From Sliver To Yarn – The Complete Yarn Spinning Process You Need to Know 5 Safe? Hazards in Spinning Industry and How to Prevent Them March 30, 2023 Himanshu Fogla Spinning Can ♦ ♦ ♦ Spinning is all about the process that is followed to transform fibres into yarns in their final form. Simple as it sounds, this process has mul?ple stages – and problems in any of these yarn spinning stages can lead to output qual? being hampered and overall produc?v? being compromised. That’s precisely why all mill-operators (every stakeholder in the tex?le industry, for that ma?er) should have a clear idea about the di?erent stages of spinning. Given that the reliabil? and usabil? of sliver can and related products also have a direct e?ect on opera?onal e?ciency levels, being aware about the best prac?ces to use them is also vital. In what follows, we will take you through the broad phases in the fibre-to-yarn journey: 1. Bale Opening and Blending The spinning process kickstarts with the bale opening. The co?on, which is present in bales in a heavily compressed form, is converted into a cleaner and looser form. Through careful blending, varia?ons and inconsistencies in the yarn are minimised, and overall homogene? is enhanced. The fibres are moved to the blending area, and the bales are opened at the same ?me. High- qual? compressed air is used to make sure that the fibre-mixing is done in an uniform manner. Maintaining this homogene? is important. 2. Unicleaning Co?on, in its raw form, has plen? of accumulated dirt and contamina?on par?cles. These include seeds, sand grains, leaves & more – which have to be eliminated from the co?on bale. For this, the co?on fibre has to be compressed into streamlined sheets. At the end of this ‘unicleaning’ stage, the ‘lap’ is formed – which has to be further prepared and processed. Once all the ‘fibre-

2. fragments’ and other such external elements are eliminated, the fibre becomes ready to be moved to the next stage. 3. Blowroom This can be considered as the in?al stage of the core spinning process. Opposing spikes, air current, and beaters are used in the blowroom – with the key objec?ve being smooth and e?cient removal of impur?es from the co?on fibres. A?er the material is opened and the ??s are formed, thorough cleaning is done – and, if required, blending (if required, between two or more fibre ?pes). The flocks (or laps) that are formed have proper width and height uniform?. In certain instances, the open fibres may also be transferred into a chute feed. 4. Carding A systema?c sequence of dividing / re-dividing ac?v?es is performed in the carding machinery, for carefully disentangling and intermixing the fibres. The ‘lay’ (which, in essence, is a thin fibre sheet) is formed during this stage. For this, the fibres are placed parallelly to each other. Impur?es (which were not removed in the blowroom) and neps are removed at this stage. By opening individual ??s, and conver?ng the lap into sliver, fibre becomes untwisted and smooth. Fibres are selected according to length, and those with the lowest length are discarded. Broadly speaking, this stage includes two broad ac?on ?pes – carding and stripping. It is also essen?al to use high-qual? sliver can for carding, that would eliminate risks of yarn defects. Suggested Read : Carding Method And Carding Machine Functions 5. Draw Framing The sliver that comes out from the carding stage is, generally, rather uneven / non-uniform. As such, the sliver is not yet suitable for yarn produc?on. The drawframing stage is vital in this context, since over here, the doubling and dra?ing machinery is used to create single strands from mul?ple strands that were obtained in the previous stage. Dra?ing, in par?cular, is done for fibre a?enua?on. Unevenness is minimised through equalising, parallelising is done to set yarn strength parameters, and varia?ons in the raw material are made up for by blending. Removal of external dust par?cles also happens during the draw framing stage. Note: For wool spinning, the GILLING process is done, for aligning the long fibres and getting rid of the relatively shorter ones. 6. Combing A hugely important phase in yarn spinning, combing is where the ac?al forma?on of sliver takes place. Prior to that, all exis?ng impur?es present in the comber lap are eliminated, and short fibres are removed as well. The comber process includes several key ac?ons, including lap feeding & nipping, roller detaching, piecing, and cylinder comb cleaning. A big percentage of fibre neps are done away with at the combing phase. The fibres are straightened too, and sliver evenness is maximised. 7. Roving or Speed Frame

3. In this stage, a standard roving frame is present, for feeding the drawn slivers, and adding a proper twist to them. Spinning can products are used to collect these ‘roving strands’ – following which, they are transferred to the spinning machinery. The roller speed is gradually increased (through which the sliver is passed). The linear fibre dens? is minimised, and the overall sliver size is brought down to make it ideal for yarn spinning. The speed frame here performs three main func?ons: a) dra?ing (to reduce per unit sliver length), b) twis?ng (to add roving strength), and c) winding (for winding on the roving bobbin). 8. Ring Frame The fineness of the fibre gets a significant boost with the help of ring frame. The roving is dra?ed for enhancing this fineness, and yarns of the requisite count & strength levels are formed (by twis?ng). To ensure secure, damage-free storage and processing of the twisted yarn, the la?er is winded in the bobbin. The processes that take place in the ring frame include dra?ing, creeling, do?ng, twis?ng, winding and building. 9. Spinning and Winding Finally, yarn strengthening is done in the spinning stage, by adding a certain level of ‘twit’. Following this, ring bobbin winding is done. The package size should ideally be rela?vely large – to ensure be?er produc?v? and e?ciency. Auto coners are used for precisely this purpose. Splicing and/or cu?ing is done too, for doing away with possible yarn imperfec?ons (poor thickness, slubs, etc.). Advanced auto coners generally have automated splicing / cu?ing tools. Note: In addition to the above, there are other, more new-age spinning methods – like air jet spinning, open-end spinning, and friction spinning. Choice of spinning can in par?cular, and material handling systems in general, is of immense importance in yarn spinning processes at mill floors. For instance, if the cans chosen by a mill are not compa?ble with the installed spinning machinery (e,g., Rieter or Trutzschler or any other OEM), that can lead to significant produc?on down?mes and problems. Each of the spinning stages has to be carried out with a lot of care and precision, to ensure that the final yarn qual? is at par with the finest. Share on Facebook Tweet Follow us Save Himanshu Fogla Passionate about transforming the industrial sector of tex?le and spinning industry with innova?ve solu?ons. Director at Jumac Manufac?ring, leading spinning cans and accessories manufac?rer and exporter from Kolkata, India. Tags: Sliver Cans, spinning cans, spinning cans manufac?rer, spinning process, yarn making process, yarn spinning process Related Posts Essen?al Key Elements That Make Jumac Spinning Cans Ensure What Gives Shape To Your Sliver Jumac Spinning Cans Best in Op?mal Compa?bil? with Mul?- Can

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