Weft-knitted lace fabric simulation based on the spring-mass model

Abstract

Purpose The obtained simulation structures could reflect the appearances and the features of the fabrics. The purpose of this paper is to promote a lot for design and manufacturing of weft-knitted lace fabrics (WKLF). Design/methodology/approach The advantages of WKLF compared with warp-knitted ones were displayed. The formation mechanism of the WKLF was analyzed with employing the mechanics principles. Spring-mass model was proposed in this paper to achieve the simulation of the fabrics. End mass points and intermediate mass points were involved in the model. The displacement of end mass points was considered the dominance and the foundation to settle the positions of all the mass points. Findings A novel jacquard lace style fabric with pattern-background effect knitted on circular knitting machine were put forward, which were different from the traditional lace fabrics manufactured on the warp knitting machines. Originality/value First, as the manufacturing equipment, circular knitting machine costs much less than warp knitting machine; second, the elastic performance along weft direction of WKLF is more excellent than that of warp-knitted ones. Third, the excellent extensibility gives nice comfort; furthermore, long floating threads do not exist on the WKLF surface, so that the snag will be avoided.

Research on an Intelligent Piezoelectric Needle Selector System with Closed-Loop Fault Detection Capability

“…In Equation (1), 'T' stands for the period of the PWM waveform, 'K' is a counting variable with a non-negative integer value, 'n' represents the time occupied by the highlevel voltage within one period, and 'V h ' and 'V l ', respectively, denote the high-level and low-level voltages within the PWM waveform. Performing a Fourier expansion on Equation (1) yields Equation (2).…”

“…The circular weft knitting machine is a knitting mechanical device that utilizes a selector to control knitting needles housed within a needle cylinder, transforming the fed yarn into circular fabric and ultimately producing tubular fabric [1,2]. The selector within the circular weft knitting machine is a crucial operational component responsible for creating fabric patterns, and its performance directly impacts the production efficiency of the circular weft machine and the diversity of fabric patterns it can produce.…”

Computer-aided design of weft-knitted two-side jacquard fabric

“…In the research of the computer-aided design (CAD) of weft-knitted jacquard fabric, the research is divided into two aspects. Mathematical matrix modeling is carried out for pattern artisan and knitting diagram of weft knitted jacquard fabric, the CAD of the fabric is realized, such as weft-knitted imitation lace fabric (Zhang et al , 2015a, b, c; Cong et al , 2017), weft-knitted jacquard plush fabrics (Guo et al , 2014), weft-knitted multi-track jacquard fabric (Wang et al , 2017), weft-knitted jacquard fabric (Wang et al , 2018). Mathematical geometric modeling is carried out for three-dimensional jacquard structure and loop deformation structure of weft knitted jacquard fabric, the CAD of the fabric is achieved, such as plain weft knitted fabrics (Lu et al , 2017; Vassiliadis et al , 2007), fancy weft-knitted fabric (Sha et al , 2017; Kayacan et al , 2008; Kurbak et al , 2008), double-layer jacquard fabrics (Cong et al , 2018), multilayer weft-knitted fabrics (Jin et al , 2015).…”