Classification Of Circular Weft Machine
Sep 09, 2018

Classification of circular weft

     The circular weft machine can be classified according to the type of knitting needle, the number of cylinders, the configuration of the syringe and the movement of the knitting needle.

     The circular weft machine is mainly composed of a yarn feeding mechanism, a knitting mechanism, a pulling-winding mechanism and a transmission mechanism. The function of the yarn feeding mechanism is to unwind the yarn from the bobbin and transport it to the weaving area, which is divided into three types: negative type, active type and storage type. The negative feed yarn is pulled from the bobbin by tension and fed into the weaving zone. This yarn feeding mechanism has a simple structure, but the yarn uniformity is poor. The active yarn is actively conveyed to the knitting zone at a constant linear speed. The advantage is that the yarn is evenly distributed and the tension fluctuation is small, which helps to improve the quality of the knitted fabric.

     The storage type yarn is unwound from the bobbin to the storage bobbin by the rotation of the storage bobbin, and the yarn is pulled out from the storage drum by the tension and enters the weaving area. Since the yarn is stored on the storage drum and has a short relaxation effect, and is unwound from the fixed diameter storage drum, the yarn tension caused by the different yarn capacity and the unwinding point of the package can be eliminated. difference.

     The function of the weaving mechanism is to weave the yarn into a cylindrical fabric by working the looping mechanism. A knitting mechanism unit capable of forming a yarn into a coil by itself is called a loop forming system, and is commonly called a "road". Circular weft machines are generally equipped with more looping systems. The knitting mechanism includes knitting needles, yarn guides, sinkers, needle steel plates, syringes, and triangles.

     The needle is placed on the syringe. The syringes are available in both rotary and fixed versions. In the plucking machine, when the rotating syringe brings the lingual needle in the barrel groove to the fixed triangle, the triangle pushes the needle to move the needle and weave the yarn into a loop. This method is beneficial to increase the speed of the vehicle and is widely used. When the syringe is fixed, the latch is pushed by a triangle that rotates around the barrel to form a loop. This method makes it easy to change the triangle position during operation, but the speed is slower. On the crochet circular weft machine, the crochet rotates with the cylinder, and the yarn is driven by the sinker to make the yarn and the crochet move relative to each other to form a loop.

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