Abstract
In this paper a mathematical model of looped warp knitted jacquard fabric is proposed. The technology parameters cover chain notation, threading, jacquard pattern grid and so on are defined based on the matrix. A basic pattern matrix is derived from chain notation and threading using the block matrix. Then combined with the displacement data of jacquard girds, the jacquard pattern matrix is calculated. Finally, the stitch type and stitch position are obtained analyzing the pattern information in the previous matrix. Special stress is laid on the difference between two different displacement data of jacquard girds, RT = 0 and RT = 1, which results in inconsistent lapping for the same jacquard bitmap. The pattern models are implemented and the jacquard lapping bitmap and three-dimensional simulation are generated by a calculating program via Visualstudio2015 using C# and JavaScript. The results show that this model can distinguish two types displacement jacquard information. The parameter input process is simplified and the run time for calculation is also shortened. In addition, with the help of CAD system via the web, priorities including resource sharing, design-time saving, and efficiency improving are achieved.
Highlights
A looped warp knitted jacquard fabric, produced on a warp-knitted single-bar jacquard raschel machine, is the most popular and exquisite fabric for interior decoration, underwear, swimsuit, scarf, and so on
Based on the basic chain notation of warp knitted jacquard fabric and the displacement information corresponding to jacquard grids, a simplified model via the matrix is proposed in this paper
In order to implement the simulation, a simulator named IWKDS is designed in a warp knitted computer-aided design (CAD) system based on the web
Summary
A looped warp knitted jacquard fabric, produced on a warp-knitted single-bar jacquard raschel machine, is the most popular and exquisite fabric for interior decoration, underwear, swimsuit, scarf, and so on. Based on the basic chain notation of warp knitted jacquard fabric and the displacement information corresponding to jacquard grids, a simplified model via the matrix is proposed in this paper. Technology parameters covering chain notation, basic patterns, a jacquard pattern bitmap and threading are transferred into machine data to control the design of the warp knitted jacquard fabric in the CAD software.
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