The formation process of the warp knit pattern is actua […]
The formation process of the warp knit pattern is actually a regular traverse of the bar under the control of the bar traverse mechanism, and the yarn is placed on different knitting needles, so that the yarn is regularly arranged according to the design pattern. The process of forming a loop and wearing a sleeve. The traverse motion determines the distribution of the coils formed by the warp yarns of the respective combs in the fabric, thereby forming different tissue structures and patterns, that is, the performance of the comb traverse mechanism directly determines the fancy effect of the warp knitting products. , performance and grade. Comb traverse mechanism plays a key role in the variety of warp knitting products, product grades and the creative space of product developers.
Traverse movement law
During the forming process of the warp knitting machine, the main shaft is woven by one course, and the bar is traversed in the direction of the needle bed, the needle is moved horizontally, and the needle is traversed twice. The traverse time of the bar should be closely matched with its swing, and the traverse cannot be performed during the swing between the needles. Depending on the pattern structure, the needle front yarn does not exceed two stitches, and the needle back yarn may be zero, one, two or more stitches. The moving time of the bar is extremely short, so it should be ensured that the traverse movement of the bar is smooth and the speed does not change drastically. The distance that the bar is traversed each time is an integral multiple of the stitch length, and after moving, the guide needle should be in the proper position of the needle gap to avoid collision or friction between the yarn guide needle and the yarn on the needle when the needle is swung.
Since the invention of the first Tricot warp knitting machine in England in 1775, a mechanical bar traverse mechanism has been created. The mechanical bar traverse mechanism has a long history, mature technology, stable and reliable operation, and can meet the requirements of the traverse movement of the bar. Until now, it is still widely used in various warp knitting machines. Depending on the model, various mechanical bar traverse mechanisms vary greatly in structure and performance. There are mainly two types of chain drum type and disk type cam, which are the principles of applying a cam.