The Research on the Width of the Closed-Circuit Square-shaped Embroidery Element

Abstract

In modern manufacturing embroidered elements are used in such areas as implant production, rehabilitation (e.g., embroidered sensors), medical diagnostics, production of smart garments etc., where high accuracy is required to maintain the functionality of the product. Due to the influence of mechanical forces taking part in the embroidery process, the embroidery system is deformed, resulting in noncompliance of the embroidery element with the digitally designed one. Three fabrics have been selected as the objects of the research with the fiber composition of 65 % polyester and 35 % cotton, differing by weave and density. 60 × 60 mm and 6 mm wide closed circuit square-shaped embroidery elements have been used for the research. According to the performed analysis of the results, the dimensions of the closed-circuit square-shaped embroidery element have changed in comparison to that of the digitally designed one. The width of the embroidery element, which was the most adequate to the digitally designed one, was achieved in the direction of warp. The obtained results have shown that in the corners the width of the embroidery element in the directions of warp and weft is bigger than the one in the centers of the segments.

The Research on the Accuracy of the Geometrical Parameters of the Closed-Circuit Embroidery Element

“…Different form of the embroidery element is also obtained in the researches performed by other authors in their investigations, where they highlight the physical and mechanical properties of the fabric, which have an impact on the aesthetic and exploitation quality of the embroidery elements [11 -14]. The research focus on the precision of the single closed contour width of the embroidered elements [11]. After a synergistic research has been accomplished the scientists analysed the changes in the geometrical parameters of the rectangular elements, performed by using three different lengths of the stitch and came to the conclusion that by using the materials, providing additional stiffness to the form and technical conditions remaining the same, the geometrical parameters of the investigated knitted materials, opposite to the of the structure, are received different because of the differences in the physical properties of the materials [2].…”

“…In case inner measurement does not comply with the designed one, the defects of the embroidery element appear, such as a gap between the elements, the offset of different threads of the elements etc. [2,5,11]. Therefore, the compliance of these parameters is so important and relevant.…”

“…In this case, depending on filling type T, when the closedcircuit square-shaped contour is wider in embroidery elements, longer successions of stitches are formed than in the investigated narrower contours. In type T filling the interconnection of the stitches is on the bottom side of the embroidery system, therefore, the loads of stretching of the threads are distributed unevenly [11,12,14]. While joining longer successions of stitches by using type T filling, the upper sewing thread more times passes the eye of the needle than in shorter successions of stitches; therefore, the embroidery elements of wider closed contour are more affected mechanically.…”

“…Based on the obtained results, it is possible to state that while geometrical parameters of the embroidery elements are different; their form is obtained different as well. In previous scientific researches, while analysing the width of the contour it has been determined that the type of filling and the direction of the stitch formation have an impact on the width of the square-shaped embroidery element depending on the characteristics of the fabric [11].…”

“…While filling the embroidery area applying the selected filling types, e.g. zigzag, tatami, the purpose is to achieve the uniformity of the forms of the elements [11,12], therefore, while making stitches during the process, the interconnection of the threads should be visible only on the flip-side of the element [5,6,11,12]. The appearance of undesirable defects, shrinking of the fabric, puckering is influenced by relaxation phenomena, taking place in the threads after the process of sewing, in which, during the shrinking of the threads, the cohesion between the threads of the fabrics is reduced and the fabric gets wrinkled [11 -14].…”