Deformační vlastnosti skané příze
Title Alternative:Deformational properties of plied yarn
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Date
2012
Authors
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Journal ISSN
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Publisher
Technická Univerzita v Liberci
Abstract
Táto diplomová práca sa zaoberá skúmaním vplyvu stkacieho zákrutu na deformačné vlastnosti stkanej priadze so zameraním na pevnosť, ťažnosť a deformačnú prácu. Teoreticko - rešeršná časť je venovaná prehľadu základných parametrov priadze. Obsahuje problematiku vlastností priadze, ako je jemnosť, zákrut, pevnosť, ťažnosť, mechanické a deformačné vlastnosti priadze. Máme tu opísanú problematiku stkania (stkaná priadza a jej vlastnosti), druhy stkacích strojov, štatistické spracovanie dát, medzi ktoré patrí napr.: priemer, rozptyl, smerodajná odchýlka, variačný koeficient, interval spoľahlivosti. Experimentálna časť je zameraná na súbor experimentálnych priadzí, ktoré sú vyrobené dvojzákrutovou technológiou vo firme Hoflana Liberec ? Machnín s. r. o. Pre tento typ stkaných priadzí bola zvolená vhodná rada jemnosti, ktoré boli ďalej využité k dvojmo, trojmo, štvormo stkaných priadzí, pri ktorých bolo použitých 5 úrovní stkacích zákrutov. Na súbore experimentálnych priadzí sme zisťovali vplyv vybraných parametrov stkaných priadzí na deformačné vlastnosti stkaných priadzí na prístroji INSTRON 4411, kde sú hodnoty merané staticky a CTT ? Constant Tension Transport, kde získavame namerané hodnoty za pohybu priadze, čo viac odpovedá samotnej produkcii piradze. Následne sme namerané hodnoty matematicko ? štatisticky spracovali a hodnoty vniesli do grafov. V závere sme prevádzali vyhodnotenie vplyvu úrovní stkacích zákrutov, jemnosti a počtu jednoduchých priadzí v priadzí stkanej v závislosti na sledované vlastnosti stkaných priadzí z hľadiska deformačných vlastností.
This diploma thesis is concerned with examining the influence of plied twist on the deformational properties of plied yarn, focusing on tenacity, elongation and deformational work. The part of theoretical research is dedicated the overview of basic parameters of yarn emphasizing fitness, twist, tenacity, elongation and mechanical and deformational properties of yarn. Closer attention is paid to twisting (plied yarn and its properties), types of twisting machines, statistical evaluation of data on average, variance, standard deviation, coefficient of variation and reliability interval. Experimental part revolves around a set of experimental yarns, which are produced using two-twist technology in Hoflana Liberec ? Machnín s.r.o.For the given set of plied yarns an appropriate fineness was selected to be used in production of multiple-twist plied yarns, during production of which five levels of plied twist was used. The thesis examines the influence of selected parameters of plied yarn on its deformational properties. The given set of yarns is measured statically on INSTRON 4411 and in motion on CTT ? Constant Tension Transport, which is more alike to the production of yarn. The measured output is processed both mathematically and statistically and introduced in a form of graphs. Finalizing the thesis, we conducted an evaluation of the influence of levels of the plied twists, fineness and number of simple yarns in plied yarn dependent on its monitored properties from the viewpoint of deformational properties.
This diploma thesis is concerned with examining the influence of plied twist on the deformational properties of plied yarn, focusing on tenacity, elongation and deformational work. The part of theoretical research is dedicated the overview of basic parameters of yarn emphasizing fitness, twist, tenacity, elongation and mechanical and deformational properties of yarn. Closer attention is paid to twisting (plied yarn and its properties), types of twisting machines, statistical evaluation of data on average, variance, standard deviation, coefficient of variation and reliability interval. Experimental part revolves around a set of experimental yarns, which are produced using two-twist technology in Hoflana Liberec ? Machnín s.r.o.For the given set of plied yarns an appropriate fineness was selected to be used in production of multiple-twist plied yarns, during production of which five levels of plied twist was used. The thesis examines the influence of selected parameters of plied yarn on its deformational properties. The given set of yarns is measured statically on INSTRON 4411 and in motion on CTT ? Constant Tension Transport, which is more alike to the production of yarn. The measured output is processed both mathematically and statistically and introduced in a form of graphs. Finalizing the thesis, we conducted an evaluation of the influence of levels of the plied twists, fineness and number of simple yarns in plied yarn dependent on its monitored properties from the viewpoint of deformational properties.
Description
katedra: KTT; přílohy: 1 CD; rozsah: 115 s.
Subject(s)
stkaná priadza, jemnosť, zákrut, pevnosť, ťažnosť, deformačné vlastnosti, instron, ctt, plied yarn, fineness, twist, tenacity, elongation, deformational properties, instron, ctt