Wyniki wyszukiwania - BazTech

1

Analysis of regularized card sliver after short-termlevelling process

Idzik M.

Autex Research Journal

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2010

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Vol. 10, no. 2

35--38

EN

Doubling of sliver has ceased to be the fundamental operation for reducing the weight irregularity of spinning halfproducts, which are decisive for the quality of yarn. Its role has now been taken over by the general use of autolevellers. After leaving the regulation zone, card sliver, whose weight irregularity is reduced by a short-termautoleveller, undergoes a process of relaxation. This phenomenon takes place only in the case of regulated sliver. Unregulated slivers passing through a leveller operating with constant draft show few relaxing properties. One reason why autolevelled card sliver has such relaxing properties may be the variation of the drafting force caused by the continually changing draft. The performance of the short-term card autoleveller cannot be unequivocally evaluated. The main difficulty lies in the time span between levelling and measurement, during which the sliver undergoes relaxation. How quickly the autolevelled card sliver is fed to the next machine in the yarn manufacturing process is therefore important, because in the intervening time the initial irregularity of the product may undergo uncontrolled changes.

2

Computer analysis distribution of the yarn linear density from open end spinning machine

Idzik M.

Autex Research Journal

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2009

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Vol. 9, no. 4

101--104

EN

Basing on a detailed kinematics scheme of the R1 Rieter rotor spinning machine, calculation of spectral characteristics of yarn made on the spinning machine was done. The calculations served to create a computer programme facilitating the qualitative evaluation of the spinning process on the R1 spinning machine. It also allows a rapid localising of mechanical damages and technological errors in the machine. The calculations make it possible to detect the sources of periodical faults and damages of yarn which follow from: the noncentred work of elements of the spinning machine or from their being damaged, from damaged pulleys, gear wheels, driving belts, from dirt or damages of the elements driving the roller etc.

3

Analysis of the Work of a Card Autoleveller with a New Algorithm of Operation

Idzik M.

Fibres & Textiles in Eastern Europe

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2006

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Vol. 14, no. 2 (56)

34--36

EN

These studies concern the work of a modernised autoleveller whose algorithm of operation allows for the phenomenon of sliver retardation after short-term regulation. The autoleveller’s effectiveness at standard and corrected controlling signals was compared. Measurements were made for cotton, viscose and polyester fibres, applying three different drafts in the autoleveller. It was demonstrated that the levelling capacity of the new autoleveller is much better than that of the traditional one.

PL

Badania dotyczyły analizy pracy zmodernizowanego regulatora rozciągu, którego algorytm działania uwzględnia zjawisko retardacji taśm przędzalniczych po procesie regulacji krótkoodcinkowej. Porównano skuteczność działania regulatora przy standardowym i skorygowanym sygnale sterującym. Pomiary wykonano dla bawełny, włókien wiskozowych i włókien poliestrowych, przy zastosowaniu trzech różnych rozciągów w regulatorze. Wykazano istotny wzrost zdolności wyrównującej nowego regulatora w stosunku do regulatora tradycyjnego.

4

Effect of Operating a Control System on Linear Density Distribution of a Fibre Stream

Idzik M.

Fibres & Textiles in Eastern Europe

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2003

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Vol. 11, no. 1 (40)

75--79

EN

This article presents a part of technological studies concerning the recognition of phenomena connected with the retardation of sliver levelled with a card short-term controller, the so-called autoleveller. Studies were conducted for long- and medium-fibre cotton and for polyester fibres, over a wide range of linear density of slivers and autoleveller drafts. For the purposes of these studies, an original measuring stand was constructed on the basis of the prototype model of the autoleveller.

PL

Artykuł przedstawia fragment badań technologicznych nad rozpoznaniem zjawisk związanych z retardacją taśmy przędzalniczej wyrównywanej krótko-odcinkowym zgrzeblarkowym układem sterowania zwanym regulatorem rozciągu. Badania prowadzono dla bawełny długo- i średniowłóknistej oraz dla włókien poliestrowych, uwzględniając szerokie spektrum mas liniowych taśm i rozciągów nominalnych w regulatorze. Do celów badań skonstruowano oryginalne stanowisko pomiarowe w oparciu o prototypowy model regulatora.