Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (05): 73-78.doi: 10.13475/j.fzxb.20200903706

• Textile Engineering • Previous Articles     Next Articles

Knitting process design of fully-fashioned Y-shaped three-way pipe fabrics

CHEN Xi, MIAO Xuhong(), LIU Qing, DONG Zhijia   

  1. Engineering Research Center for Knitting Technology, Ministry of Education, Jiangnan University, Wuxi, Jiangsu 214122, China
  • Received:2020-09-15 Revised:2021-01-31 Online:2021-05-15 Published:2021-05-20
  • Contact: MIAO Xuhong E-mail:miaoxuhong@163.com

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Abstract:

In order to develop industrial tubular fabrics that meet market demand, a Y-shaped three-way tubular knitted fabric was engineered by using a computerized fully-fashioned double-needle-bed flat knitting machine, which was taken as an example to study the forming method of fully-fashioned tubular fabrics and the knitting process parameters. Fully-fashioned needles were used to narrow and widen the tubular fabric by transferring loops of the front and back needle beds while knitting the cylindrical shaped fabric. By changing the transverse width of the fabric, the Y-shaped three-way pipe can be knitted fully-fashioned. When designing, the three-dimensional structure of the Y-shaped three-way pipe was tranformed into a two-dimensional shape, and according to parameters such as size, fabric density, knitting direction and the angle between pipes, the knitting process was designed and calculated. The results show that the angle between the Y-shaped three-way fabric pipes is determined by the knitting-to-narrowing ratio. The larger the knitting-to-narrowing ratio, the greater the angle between the pipes. The accuracy of the calculation formula and the feasibility of the design method were verified by producing Y-shaped three-way pipe fabrics with two different angles, employing different pipe diameters and fabric densities.

Key words: Y-shaped three-way pipe fabric, fully-fashioned, knitting process, narrowing by transferring loop, knitting-to-narrowing ratio

CLC Number: 

  • TS184.5

Fig.1

Y-shaped three-way pipe fabric knitted by narrowing and widening with holding loop. (a)Three-dimensional structure diagram; (b)Two-dimensional expansion diagram; (c)Knitting diagram of narrowing and widening with holding loop"

Fig.2

Knitting diagram of narrowing and widening by transferring loop"

Fig.3

Fully-fashioned needle transfers loop"

Fig.4

Y-shaped three-way pipe fabric structure. (a)Three-dimensional structure diagram;(b)Two-dimensional shape diagram"

Fig.5

Right side narrowing shape of Y-shaped three-way pipe fabric part B"

Fig.6

Narrowing point distribution of Y-shaped three-way pipe fabric part B when z=2"

Tab.1

Knitting process parameters of Y-shaped three-way pipe fabric with different diameters"

织物 管径
D/cm		 管高
H/cm		 织物横密PA/
(纵行·(10 cm)-1)		 织物纵密PB/
(横列·(10 cm)-1)		 单管编织
针数T		 单管编织
行数L		 收针时单侧
收针针数N		 编织收针比例
L1∶L2∶N		 2分管间夹
角α/(°)
织物1 3 6 75 70 36 42 17 2∶3∶2 87
织物2 4 6 75 70 48 42 23 2∶3∶2 89
织物3 5 6 75 70 60 42 29 2∶3∶2 94

Fig.7

Y-shaped three-way pipe fabric with different diameters. (a)Fabric 1; (b)Fabric 2; (c)Fabric 3"

Tab.2

Knitting process parameters of Y-shaped three-way pipe fabric with different fabric density"

织物 度目值 织物横密PA/
(纵行·(10 cm)-1)		 织物纵密PB/
(横列·(10 cm)-1)		 单管编织
针数T		 单管编织
行数L		 收针时单侧
收针针数N		 编织收针
比例L1∶L2∶N		 2分管间
夹角α/(°)
织物4 43 65 60 44 42 21 4∶8∶7 117
织物5 38 75 70 44 42 21 4∶8∶7 119
织物6 33 80 80 44 42 21 4∶8∶7 113

Fig.8

Y-shaped three-way pipe fabric with different fabric density. (a)Fabric 4; (b)Fabric 5; (c)Fabric 6"

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