Abstract: Disclosed are a tension adjustment method of a warp knitting variable-speed and uniform-tension yarn feeding device, and a weaving method. The device includes warp beams, connecting rod frames, a guide bar, a looping mechanism and a drawing and rolling-up mechanism, where the connecting rod frames are connected to yarn winding wheels and yarn guide plates, yarns are wound on the warp beams, and the yarn winding wheels are positioned between the warp beams and the guide bar; each of the yarn winding wheels includes a yarn inlet, a yarn winding shaft and a yarn outlet. According to the present disclosure, the tension produced in a yarn feeding process is actively adjusted by the variable-speed tension yarn winding wheels to make up tension error caused by looping; and the present disclosure is capable of compensating in time, does not easily break the yarns, is high in knitting efficiency and quality.

Abstract: The disclosure discloses a control method of pattern loading for a high speed double needle bar warp knitting machine. Through disposing two or more than two high speed FIFO pattern data cache regions on a shog controller, a data read-write conversion function of each cache region continuously and automatically is respectively realized. Needle collision caused by guide bar shogging during pattern loading is avoided. Pattern loading steps of the double needle bar warp knitting machine are simplified; the work intensity is reduced; and the work reliability is improved.

Abstract: The disclosure discloses an online detection method of circular weft knitting stripe defects based on a gray gradient method, and belongs to the technical field of textile product detection. The method provides a defect detection and positioning method based on the gray gradient method. Before the detection on a new product, only a model needs to be trained to obtain stripe defect feature images with different stitch types and different stitch densities, and the detection is directly performed in a subsequent process. Defects can be fast and accurately recognized, and a cam position causing the stripe defects can be calculated according to a quantity of shot images between the feature images and a marked image, courses in which marks in the marked image are located, courses in which defects in a defect image are located, and machine operation parameters. Moreover, a defect detection device required by the disclosure can be modified on an original circular knitting machine, so the detection cost is reduced.

Abstract: The disclosure discloses an online detection method of circular weft knitting stripe defects based on a gray gradient method, and belongs to the technical field of textile product detection. The method provides a defect detection and positioning method based on the gray gradient method. Before the detection on a new product, only a model needs to be trained to obtain stripe defect feature images with different stitch types and different stitch densities, and the detection is directly performed in a subsequent process. Defects can be fast and accurately recognized, and a cam position causing the stripe defects can be calculated according to a quantity of shot images between the feature images and a marked image, courses in which marks in the marked image are located, courses in which defects in a defect image are located, and machine operation parameters. Moreover, a defect detection device required by the disclosure can be modified on an original circular knitting machine, so the detection cost is reduced.

Abstract: The disclosure discloses a control method of pattern loading for a high speed double needle bar warp knitting machine, and belongs to the technical field of warp knitting equipment. Through disposing two or more than two high speed FIFO pattern data cache regions on a shog controller, a data read-write conversion function of each cache region continuously and automatically is respectively realized. According to a current position of each guide bar, a target position of current shogging of an original pattern and a starting course position of a novel pattern, a control system of the double needle bar warp knitting machine automatically calculates a shogging displacement required by each guide bar in a pattern loading process, and sends out instruction information to a shog driving execution unit corresponding to each guide bar.

Abstract: A jacquard warp tensioning device for a warp knitting machine, comprising a pair of side panels (1) disposed on two sides of the machine casing, a warp beam (2) positioned at the upper portions of the side panels (1), a plurality of warp guide rods (3, 4, 5) disposed at positions lower than that of the warp beam (2) and a flat spring warp dividing device (16), wherein an upper tension balancing device (6) and a lower tension balancing device (11) are disposed between the warp beam (2) and the warp guide rods (3, 4, 5), the upper tension balancing device (6) comprising an upper rotating shaft (7) with two ends thereof disposed on the side panels (1), an upper servo motor (8) disposed at one end of the upper rotating shaft (7) and an upper tensioning rod (9) fixedly disposed on the upper rotating shaft (7) by means of a plurality of upper connecting rods (10), the lower tension balancing device (11) comprising a lower rotating shaft (12) with two ends thereof disposed on the side panels (1), a lower servo motor

Abstract: A method for knitting fall-plate structures on warp-knitting machines, including: the fall-plate guide bar makes an overlap when the groove needle bar is going upward and the previous loop is held by the sinker bar; the groove needle bar and the tongue bar simultaneously go downward but these two items are kept not closed, and the overlapped yarn and the previous loop are slipping inside together; the groove needle bar go upward again while both the fall-plate yarn and the previous loop are held by the sinker bar, making the two yarns slip out of the groove needle. Meanwhile, a ground guide bar makes an overlap, finishing lapping. When moving the groove needle bar downward for a second time, retreating the old loop and the pressed yarn; forming a new loop, by the ground yarn; placing the pressed yarn under the new loop; and forming the fall-plate structures.

Abstract: A jacquard warp tensioning device for a warp knitting machine, comprising a pair of side panels (1) disposed on two sides of the machine casing, a warp beam (2) positioned at the upper portions of the side panels (1), a plurality of warp guide rods (3, 4, 5) disposed at positions lower than that of the warp beam (2) and a flat spring warp dividing device (16), wherein an upper tension balancing device (6) and a lower tension balancing device (11) are disposed between the warp beam (2) and the warp guide rods (3, 4, 5), the upper tension balancing device (6) comprising an upper rotating shaft (7) with two ends thereof disposed on the side panels (1), an upper servo motor (8) disposed at one end of the upper rotating shaft (7) and an upper tensioning rod (9) fixedly disposed on the upper rotating shaft (7) by means of a plurality of upper connecting rods (10), the lower tension balancing device (11) comprising a lower rotating shaft (12) with two ends thereof disposed on the side panels (1), a lower servo motor

Abstract: A method for forming yarn pressing weave by using a groove pin warp knitting machine based on servo driving. The method is performed on a Raschel groove pin warp knitting machine, and specifically comprises: a. enabling a groove pin body (3) to rise for a first time, utilizing a sinker (5) to press against an old coil, utilizing a yarn pressing guide comb (1) to perform traverse movement before the pin, and finishing yarn laying; b. enabling the groove pin body (3) and a groove pin core (4) to descend, enabling the groove pin body (3) to be kept open, and enabling pressed yarn (6) and the old coil not to undergo ring sleeving and to together move into a pin hook; c.