Method and device of dynamically configuring linear density and blending ratio of yarn by three-ingredient asynchronous/synchronous drafted

Patent metadata

Field	Value
Publication number	US-10316436-B2
Application number	US-201515308365-A
Country	US
Kind code	B2
Filing date	Jul 28, 2015
Priority date	Mar 27, 2015
Publication date	Jun 11, 2019
Grant date	Jun 11, 2019

Abstract

The invention discloses a method of dynamically configuring linear density and blending ratio of yarn by three-ingredient asynchronous/synchronous drafted, comprising: a drafting and twisting system, which includes a first stage drafting unit, a successive second stage drafting unit and an integrating and twisting unit. The first stage drafting unit includes a combination of back rollers and a middle roller. The second stage drafting unit includes a front roller and the middle roller. Blending proportion and linear densities of three ingredients are dynamically adjusted by the first stage asynchronous drafting mechanism, and reference linear density is adjusted by the second stage synchronous drafting mechanism. The invention can not only accurately control linear density change, but also accurately control a color change of the yarn. Further, the rotation rate of the middle roller is constant, ensuring a reproducibility of the patterns and colors of the yarn with a changing linear density.

First claim

What is claimed is:

1. A method of dynamically configuring a linear density and a blending ratio of a yarn by three-ingredient asynchronous/synchronous drafting, comprising:
providing an actuating mechanism, wherein the actuating mechanism includes a three-ingredient asynchronous/synchronous two-stage drafting mechanism, a twisting mechanism and a winding mechanism; wherein the three-ingredient asynchronous/synchronous two-stage drafting mechanism includes a first stage asynchronous drafting unit and a successive second stage synchronous drafting unit;
providing a combination of a plurality of back roller and a middle roller included by the first stage asynchronous drafting unit; wherein the combination of back rollers has three rotational degrees of freedom and includes a first back roller, a second back roller, a third back roller, which are set abreast on a same back roller shaft; the first back roller, the second back roller, the third back roller move at the speeds V h1 , V h2 , and V h3 respectively; the middle roller rotates at the speed V z ; the second stage synchronous drafting unit includes a front roller and the middle roller; the front roller rotates at the surface linear speed V q ;
assuming the linear densities of a first roving yarn ingredient, a second roving yarn ingredient, a third roving yarn ingredient drafted by the first back roller, the second back roller, the third back roller are respectively ρ 1 , ρ 2 , and ρ 3 , the linear density of the yarn Y drafted and twisted by the front roller is ρ y ;

ρ
y

=

1

V
q

⁢

(

V

h
⁢

⁢
1

*

ρ
1

+

V

h
⁢

⁢
2

*

ρ
2

+

V

h
⁢

⁢
3

*

ρ
3

)

(
1
)

the blending ratios of the first roving yarn ingredient, the second roving yarn ingredient, and the third roving yarn ingredient are respectively k 1 , k 2 , and k 3 ;

k
1

=

ρ
1
″

ρ
1
″

+

ρ
2
″

+

ρ
3
″

=

ρ
1
′

ρ
1
′

+

ρ
2
′

+

ρ
3
′

=

ρ
1

*

V

h
⁢

⁢
1

ρ
1

*

V

h
⁢

⁢
1

+

ρ
2

*

V

h
⁢

⁢
2

+

ρ
3

*

V

Assignees

• Univ Jiangnan

Inventors

• Xue Yuan
• Gao Weidong
• Guo Mingrui
• Zhou Jian
• Yang Ruihua
• Wang Hongbo

Classifications

• D01H5/22

  in which fibres are controlled by rollers only · CPC title

• D02G3/04 Primary

  Blended or other yarns or threads containing components made from different materials · CPC title

• D01H5/36 Primary

  according to a pre-arranged pattern, e.g. to produce slubs · CPC title

• D02G3/34

  Yarns or threads having slubs, knops, spirals, loops, tufts, or other irregular or decorative effects, i.e. effect yarns {(carding machines for producing decorative or fancy effects in products D01G; drafting machines with varying draft according to a pre-arranged pattern D01H5/36)} · CPC title