Judge discuss method of needle and sewing machine

      The knitted fabric is soft, elastic, installed in the machine needle can be significantly reduced, mainly due to theknitted fabric sewing thin soft, the needle is raised, the fabric will random needle with the rising, the formation of theline ring on the high side, the machine needle down, can make the hook point located just ring the line width, not easy generation skipping fault.

　　Machine needle bending machine needle bending deformation directly influence the machine needle functioncomplete, leading to surface wire ring shape bad, a shuttle tip can not correctly hooked wire ring, causing skipping,this situation should be replaced with a new needle timely. The presser foot position is too high, do not pressuretight seam material general pressure foot from a needle plate plane distance should be 67mm or so, if the positionis too high, when the pressure foot pressure tight joints after feeding, the needle lifting can drive the sewing material rises, the influence line of ring shape. Needle plate pinhole too large capacity under normal circumstances, needle plate hole diameter shall not be more than 05 times the diameter of the needle machineneedle plate, if the hole is too large, the needle drop puncture seam material, suture material was packed into thehole, and the needle rises, material is extruded into the needle plate and random stitches together rise, will affect the line ring formation, especially for knitting fabric thin soft, the situation will be even more serious, this time should replace the needle plate new or in the sewing material below the pad of paper operation. Rotating shuttle(shuttle) tip broken shuttle tip broken, unable to hook wire ring, only the replacement of the rotating shuttle new(shuttle).

　　More of the sewing machine needle skipping the common faults are analyzed. The actual cause skipping fault is varied, to master the content mainly rely on the accumulation of practical experience and the causes of the failureof the correct analysis. The analysis can provide clues to search fault using the fault, gradually narrowing the scope of inspection, reduce the workload, to use, repair, improvement and lay a good foundation for sewing machine.

　　In the production of knitted garments, all kinds of sewing equipment is one of the main ring mechanism of needlestitch, to produce good products, needle biopsy in the production process is an indispensable means, therefore,simple, rapid, accurate operator how to judge the merits of the machine needle is one of the important factors affecting production efficiency. The following describes a simple needle method: making a piece of coloredpolypropylene vinyl version of B, size: length 6cm width 4cm, thickness 03cm05cm. Make a piece of the samematerial of white board A, size: length 6cm width 12cm, thickness 03cm05cm. The board is pasted on the board ofA B. The board of the four corner grinding wheel round, so, needle plate finished. The needle handle on the seamneedle plate two plate. Observation distance of needle bar and the board of the A d be consistent (such askeeping a distance D invariant, it can be concluded the needle bar is straight, otherwise it is not straight). This method of judgment only 2s4s can be completed. Through the practical application of the needle plate, which can not only improve the needle efficiency can be correctly judge the merits of the needle bar and ensure accurate.