Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (04): 80-84.doi: 10.13475/j.fzxb.20200705605

• Textile Engineering • Previous Articles     Next Articles

Modeling and loop length reverse design for reducing diameter tubular weft knitted fabrics

HU Xudong1,2, SONG Yanfeng1,2, RU Xin1,2(), PENG Laihu1,2   

  1. 1. Faculty of Mechanical Engineering & Automation, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
    2. Key Laboratory of Modern Textile Machinery & Technology of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
  • Received:2020-07-22 Revised:2020-12-09 Online:2021-04-15 Published:2021-04-20
  • Contact: RU Xin E-mail:ruxin@zstu.edu.cn

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Abstract:

In order to address the big difference between the process design goal and the formed fabric, a design method of loop length based on the target fabric was proposed. According to the characteristics of circular weft knitting machine and weft knitted fabrics, the fabrics were divided into units in the circumferential and axial directions, an improved trapezoidal loop model based on Peirce model was proposed, and the diameter reducing tubular weft knitted fabrics were modelled. On this basis, the relationship between the length of each loop and the parameters of the target fabric was studied, and the design of the fabric loop length carried out based on the target fabric. The experimental results show that the theoretical and actual results are basically the same for the change of loop length in the reducing diameter tubular weft knitted fabrics. According to the proposed modeling method based on trapezoidal loop model, it is possible to get loop length from parameters of reducing diameter tubular weft knitted fabrics, and this research exercise demonstrated loop length reverse design process.

Key words: reducing diameter tubular weft knitted fabric, geometric modeling, trapezoidal loop model, linear division, loop length

CLC Number: 

  • TS186.2

Fig.1

Hollow round table fabric. (a) Knitted skirt; (b) Divided model"

Fig.2

Hexahedron with loop"

Fig.3

Yarn loop pattern"

Fig.4

Round table model of tubular weft knitted fabric in cylindrical coordinate system"

Fig.5

Projection of fabric model"

Fig.6

Partially expanded view of fabric model"

Fig.7

Single axial unfolded view of fabric model"

Fig.8

Improved yarn loop model"

Fig.9

Change of longitudinal loop"

Tab.1

Length of loop height of longitudinal coil"

线圈序号 线圈长度/mm 误差/%
理论长度 实际长度
2# 2.645 2.690 1.7
10# 2.717 2.748 1.1
18# 2.792 2.796 0.1
26# 2.867 2.830 1.3
34# 2.944 2.874 2.3
42# 3.023 2.998 0.8
50# 3.103 3.040 2.0
58# 3.184 3.196 0.4
66# 3.264 3.224 1.2
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