In the delivery of the card a pair of disc rollers scan the cross-section of the carded sliver as it emerges. These readings are compared electronically with the . Need of Autoleveller in. carding machine •Careful control of sliver uniformity is necessary in the spinning process. •So, continuous checking of sliver weight. Keywords: Autoleveller, Cotton yarn, Count variation, Draw frame. 1 Introduction able yarn count CV has been assessed for carded counts. The effect of single.

Author: Akinokora Zologor
Country: Kenya
Language: English (Spanish)
Genre: Love
Published (Last): 27 January 2011
Pages: 230
PDF File Size: 13.50 Mb
ePub File Size: 4.35 Mb
ISBN: 559-9-65269-787-4
Downloads: 14181
Price: Free* [*Free Regsitration Required]
Uploader: Zolozilkree

Autoleveller in Carding | Autoleveller in Drawframe – Textile Centre

Short staple spinning – 1. Your feedback is always appreciated. Production and waste control in Carding Machine Carding Maintenance program Fibre hooks in carding and their effects on yarn q What are the Special features of modern beater in Degumming of Auto,eveller March 14, Md. The amount of this lift is measured and converted into a voltage proportional to the sliver thickness.

Sliver variation cause the tongue upper roll to rise or fall. A photo cell monitors the sliver between the calender rollers and the coiler. On the other hand, closed-loop control is not suited for regulating short-wave variation because of the dead time inherent in the system.

At both ends of the feed roller, microswitch is provided. Sliver break stop motion: Fibre properties to be considered for blending: Aero Mixer in Blowroom How it works? In the spinning mill, the card is the effective start of the process, since the first intermediate product, the sliver, is produced here.


Auto Leveling in Carding | Part 04 | Textile Study Center

There are two possible applications for assemblies of this type, namely in processing comber noil and where card sliver is fed directly to the rotor spinning machine. In case of open loop system, as the delivered material is not sensed for its linear density to know whether the correction has made or not.

Blending bale opener or hopper bale breaker: Developments in carding section Auto leveler autoleveller in carding How it wo Latest posts by Md.

Stop motions in the carding Stop motions are cardong in the following places of HP cards. Deviations from the nominal count are processed by electronics into correction commands, which are executed at the card in take via the feed roll. How the Carding Machine Works?

In former Zellweger equipment a medium-term auto leveler was provided as an addition to the long-term auto leveler. Principle of short term auto leveling: Settings in carding for different grades of cotton Study of different parts of carding machine and th The device measures reflection of infrared light from the fibers. Please do not spam.

Auto Leveling in Carding | Part 04

Of the two sensing roller, one is movable under spring pressure. As the calender roll move, the aluminium disc is lifted and comes in contact with adjustable pins, it operate the corresponding electro pneumatic valve on or off the doffer driving mechanism.

Auto Leveling in Carding: So, continuous checking of sliver weight together with automatic correction of sliver weight variation at card is necessary. The main regulating position is the feed; adjusting the feed roller speed, usually performs auto leveling.


The irregularity of card feed material is the important reason for sliver count variation ranging from very short upto 25 cm carving very long term more than m variations.

According to the basic principle of operation, autoleveller can be classified into two main groups: Defects in Blow room and causes.

How Laps formed in Blowroom? Comparision between mixing and blending in Blowroo Peed Roller Stop Autolevveller. Spinning mills are therefore forced to use auto leveling equipment under highly varying circumstances. Newer Post Older Post Home.

Autoleveller in Carding | Autoleveller in Drawframe

Optical feeler in the coiler unit: Thread Numbering System March 14, Md. Based on high autoeveller draft, even short term sliver irregularity leads to quite distinct count variation in yarn. To stop the doffer when sliver is missing or sliver is too thin or too thick or when the lap-up choking on coiler calender Roller.

The speed of the feed roller of the card is changed electronically so that these fluctuations in the cross-section are leveled out. These very small movements of the tongue roll or the variations in mass per unit autileveller of card sliver are amplified 20 fold and transmitted to an infinitely variable speed gear box.

Auto leveler autoleveller in carding How it works?