Jiangnan University

Fenglin Xia

Gaoming Jiang

Honglian Cong

Qi Zhang

Ailan Wan

Peixiao Zheng

Xuhong Miao

Baoping Zheng

Jiajia Peng

Aijun Zhang

Jisheng Zhang

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.

Control method of pattern loading for high speed double needle bar warp knitting machine

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.

Online detection method of circular weft knitting stripe defects based on gray gradient method

A jacquard warp tensioning device for a warp knitting machine, comprising a pair of side panels () disposed on two sides of the machine casing, a warp beam () positioned at the upper portions of the side panels (), a plurality of warp guide rods () disposed at positions lower than that of the warp beam () and a flat spring warp dividing device (), wherein an upper tension balancing device () and a lower tension balancing device () are disposed between the warp beam () and the warp guide rods (), the upper tension balancing device () comprising an upper rotating shaft () with two ends thereof disposed on the side panels (), an upper servo motor () disposed at one end of the upper rotating shaft () and an upper tensioning rod () fixedly disposed on the upper rotating shaft () by means of a plurality of upper connecting rods (), the lower tension balancing device () comprising a lower rotating shaft () with two ends thereof disposed on the side panels (), a lower servo motor () disposed at one end of the lower rotating shaft () and a lower tensioning rod () fixedly disposed on the lower rotating shaft () by means of a plurality of lower connecting rods (), the upper servo motor () and the lower servo motor () being connected with an industrial computer () through a servo driver (), respectively. The jacquard warp tensioning device proactively controls warp tension and has a high level tension compensation, thereby making the yarns not prone to being broken and enabling smooth surfaces of woven fabrics.

Jacquard warp tension device for warp knitting machine

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.

Method for forming fall-plate weave by using groove pin warp knitting machine based on servo driving

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Wuxi, China

Fenglin Xia