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

Patent metadata

Field	Value
Publication number	US-10316434-B2
Application number	US-201515123651-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

A method and a device includes a drafting and twisting system. The drafting and twisting system include 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. The blending proportion and linear densities of the five ingredients are dynamically adjusted by the first stage asynchronous drafting mechanism, and the reference linear density is adjusted by the second stage synchronous drafting mechanism. The invention can not only accurately control a linear density, but also accurately control a color change of the yarn.

First claim

The invention claimed is:

1. A method of dynamically configuring a linear density and a blending ratio of a yarn by five-ingredient asynchronous/synchronous drafting, using an actuating mechanism, which includes a five-ingredient asynchronous/synchronous two-stage drafting mechanism, a twisting mechanism and a winding mechanism; the five-ingredient asynchronous/synchronous two-stage drafting mechanism further includes a first stage asynchronous drafting unit and a successive second stage synchronous drafting unit; the first stage asynchronous drafting unit further includes a combination of back rollers and a middle roller; the combination of back rollers has five rotational degrees of freedom and includes a first back roller, a second back roller, a third back roller, a fourth back roller and a fifth back roller, which are set abreast on a same back roller shaft; the first back roller, the second back roller, the third back roller, the fourth back roller and the fifth back roller move at speeds of V h1 , V h2 , V h3 , V h4 and V h5 respectively; the middle roller rotates at a speed of V z ; the second stage synchronous drafting unit includes a front roller and the middle roller; the front roller rotates at a surface linear speed of V q ; the method comprising:
assuming linear densities of a first roving yarn ingredient, a second roving yarn ingredient, a third roving yarn ingredient, a fourth roving yarn ingredient and a fifth roving yarn ingredient drafted by the first back roller, the second back roller, the third back roller, the fourth back roller and the fifth back roller are respectively ρ 1 , ρ 2 , ρ 3 , ρ 4 and ρ 5 , 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

+

V

h
⁢

⁢
4

⋆

ρ
4

+

V

h
⁢

⁢
5

⋆

ρ
5

)

(
1
)

wherein blending ratios of the first roving yarn ingredient, the second roving yarn ingredient, the third roving yarn ingredient, the fourth roving yarn ingredient and the fifth roving yarn ingredient are respectively k 1 , k 2 , k 3 , k 4 and k 5 ,

k
1

=

ρ
1

⋆

V

h
⁢

⁢
1

ρ
1

⋆

V

h
⁢

⁢
1

+

ρ
2

⋆

V

h
⁢

⁢
2

+

ρ
3

⋆

V

h
⁢

Assignees

• Univ Jiangnan

Inventors

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

Classifications

• D01H5/22

  in which fibres are controlled by rollers only · CPC title

• D01H5/36 Primary

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

• D02G3/04

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