Wyniki wyszukiwania - BazTech

1

Design Of the Tension Mechanism Of a Knotter And Optimization Of the Motion Parameters

Lan Jiahao, Feng Pei, Zhang Junping, Zhang Ronggen, Yang Chongchang

Fibres & Textiles in Eastern Europe

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2022

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Vol. 30, no. 6

12--18

EN

Currently, the knotting of chemical fiber filament packages in factories primarily comprises manual operations. It also has a high labor intensity and is subject to artificial subjective factors, due to which it is difficult to guarantee the quality of the finished fiber products. Furthermore, it also significantly restricts the intelligent construction of chemical fiber production. This work employs partially oriented yarn (POY) and full draw yarn (FDY) to develop an automatic knotting device. The catenary theory was used to confirm the state of the yarn and to determine the relevant parameters of the tension mechanism. The results showed that the developed automatic knotting device satisfactorily meets the conditions required for manual knotting. The curve equation that was calculated using the catenary conformations of the yarn state verified that the actual yarn state was consistent with the theory. Moreover, the work provides a theoretical foundation for subsequent mechanism optimizations.

2

Distribution of the Polymer Melt Velocity and Temperature in the Spinneret Channel of Bi-component Fibre Melt Spinning: a Mathematical Model

Feng Pei, Liu Dashuang, Zhang Ronggen, Yang Chongchang

Fibres & Textiles in Eastern Europe

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2021

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Vol. 29, no. 6 (150)

49--53

EN

For the stability of composite fibre spinning, the difference in and distribution of the polymer melt velocity during the spinning are among the factors of importance. Based on the basic equation for the control of composite spinning dynamics, boundary conditions are identified and reported in this paper. A mathematical model for the symmetric and asymmetric distribution of the melt flow velocity in the microhole of the spinneret of the composite spinning assembly was developed. The accuracy of the mathematical model was also ascertained. It gives a theoretical basis for the designing of a composite spinning assembly.

3

High Efficiency Covering Technology for Covered Yarn Production: Controlling the Spandex Yarn Draw Ratio

Feng Pei, Liu Dashuang, Yang Chongchang

Fibres & Textiles in Eastern Europe

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2020

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Vol. 28, no. 6 (144)

24--28

EN

This paper proposes a new covered yarn system in which the tension of spandex elastic yarn drawing is controlled. By analysing the relationship between the draw ratio and yarn tension, it was verified that the new tension controlled drawing system is feasible and results in yarns of superior quality and process stability.

PL

W pracy zaproponowano nowy system wytwarzania przędzy oplatanej, w którym kontrolowane jest naprężenie rozciągania przędzy elastycznej spandex. Analizując zależność między współczynnikiem rozciągania a naprężeniem przędzy, zweryfikowano, że zaproponowany system ciągnienia z kontrolowanym naprężeniem jest wykonalny i zapewnia wytworzenie przędzy o najwyższej jakości z zachowaniem stabilności procesu.