Structure of circular weft knitting machine consists of frame, yarn mechanism, transmission gear, lubricating eliminating mechanism, electric control system, spooler and other accessories.
Frame
Frame of circular weft knitting machine consists of three feet and a round (or square) table. Three feet are fixed by gin. There three crutches on the table. Crutches have yarn holder. A safe door exits in the gap between three feet for steady and safety.
Characteristics:
Feet adopt build-in structure
All of electrical wiring and instruments are put inside the feet
Safe door is reliable
When safe door is opened, machine will stop operating automatically. Warning is also shown on operation panel in case of accident.
Yarn mechanism
Yarn mechanism contains yarn holder, storage device, feeding nozzle, feeding wheel, coil bracket, etc.
Yarn holder
Yarn holder is used to lay yarn. It is classified into umbrella yarn holder and landing yarn hold. Umbrella has small cover. But it cannot connect to spare yarn. It is suitable for limited space. Landing yarn holder has triangle yarn holder and wall yarn holder. Triangle yarn holder is convenient for utilizing. Wall yarn holder can be arranged beautifully. But it has large cover.
Storage device
Storage device is used to store yarn.
Feeding nozzle
Feeding nozzle is used to transmit yarn to needle directly. It has different shapes, including single feeding nozzle and double feeding nozzle.
Feeding wheel
Feeding wheel is used to regulate the number of yarn.
Requirements for yarn mechanism
Yarn mechanism should guarantee uniformity and continuity of tension in yarn. Ensure uniformity for the sizes and shape of coil in textile so that can produce beautiful textile.
Yarn mechanism should ensure reasonable tension in case of defects on the surface of textile.
Hook should be smooth without burrs in case of yarn broken.
Knitting mechanism
Knitting mechanism is the core of circular weft knitting machine, consisting of syringe, needle, triangle, triangulum, sinker (only exiting in single circular knitting machine), etc.
Syringe
Syringe is used to put needle.
2. Triangle
Triangle is used to control reciprocating motion of needles and sinker inside syringe
Sinker
Sinker only exists in single circular knitting machine, cooperating with needles.
Needle
Needle is discriminated based on the height of bell. Needle makes tarn into textile.
Triangulum
Triangulum is utilized to put triangle
Requirements for knitting mechanism
Needle track should be smooth without burrs
Knob used to regulate pressing depth on triangulum should be flexible enough.
Ensure the height of withdrawing and the depth of pressing to meet the requirements of techniques.
Spooler
Spooler is used to drag textile from knitting and wind textile in roll form. Spooler consists of spreading frame, transmission arm, regulate gear box.
Transmission mechanism
Transmission mechanism is continuously variable transmitting motor controlled by frequency transformer. The motor uses cone belt or synchronous belt to drive gears on capstan shaft. It drives syringe to knit.
Lubricating eliminating mechanism
Large numbers of flyings and dust may cause occlusion or damage to machine during knitting. Lubricating eliminating mechanism is used to eliminate dust and dredge oil way.
Electrical control system
Control panel of electrical control system is made up with microcomputer and highly integrated control circuit.
Frequency transformer is key components of motor. It can control output frequency to change the rotation rate of motor.
Accessories
When needle is broken, prober will send signal to control system. Then machine will stop after 0.5 seconds.
Post: Structure of Circular Weft Knitting Machine
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