Study on functions of different parts of circular knitting machine.pptx (1)
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This document presents a study on the functions of different parts of a circular knitting machine. It begins with an introduction on circular knitting machines and the different types. It then discusses the various parts of a circular knitting machine, including needles, cylinder, cam, cam box, sinker, and VDQ pulley. For each part, it provides a brief description and image. The document concludes that modern machines now feature on-board computers to monitor and control important functions like speed and detect issues.
Study on functions of different parts of circular knitting machine.pptx (1)
- 1. PRESENTATION ON STUDY ON FUNCTIONS OF DIFFERENT PARTS OF CIRCULAR KNITTING MACHINE.
- 2. Supervised By Md.Nazif Hasan Chowdhury Lecturer, Department of Textile Engineering Port City International University Prepared By Sany Barua (BTE-01305886)
- 3. 02 01 03 04 05 06 INTRODUCTION DIFFERENT TYPES OF SET NEEDLES DIFFERENT TYPES CIRCULAR KNITTING MACHINE MACHINE PARTS FUNCTION OF DIFFERENT PARTS CONCLUSION
- 4. INTRODUCTION Circular knitting machines always produce tube-shaped fabric. They exist in different sizes or diameters, depending on the field of application. The needles and sinkers in these machines are arranged in a circle.
- 5. DIFFERENT TYPES OF SET NEEDLES
- 6. The machines can be divided into two different types, depending on the number of sets of needles: ❖ Single Set: Plain. ❖ Two Set: Rib,Purl & Interlock.
- 7. Both single set and double set machines also exist as Jacquard machines, which are needed for special designs. In these machines, the movement of each needle can be controlled from each cam. Common products that are produced with circular knitted fabric are T-shirts. For production, nearly every material can be used. The form varies from filament to staple fibre yarn. For special purposes also monofilaments and wires are used.
- 8. Different Circular Knitting Machine Knitting machines are mainly two types; they are circular knitting machine and flat bed knitting machine. This two types are hugely use in Textile Industry. A knitting machine is composed of lots of parts. Every parts of a machine are important for run the machine smoothly. Every part has a specific function during operation.
- 9. Different circular knitting machine parts and their functions are given below: Figure: Circular Knitting Machine
- 10. Machine Parts 1. Needle ● The Bearded Needle ● The Latch Needle ● The Compound Needle 1. Cylinder Trick 2. Needle Detector 3. Sinker 4. Sinker Ring 5. Cylinder 6. Cylinder Balancer 7. Cam: a. Engineering Cam b. Knitting Cam ● Knit Cam ● Tuck Cam ● Miss Cam 9. Cam Box 10. VDQ Pulley 11. Pulley Belt 12. Brush 13. Tension Disk 14. Inlet & Outlet Stop Motion 15. Yarn Guide 16. MNF Wheel 17. Feeder Ring 18. Positive Feeder
- 11. Machine Parts: 19. Lycra Stop Motion 20. Uniwave Lubrication 21. Adjustable Fan 22. Spreader 23. Air Jet Nozzle 24. Lycra Attachment Device
- 12. Functions Of Different Parts Needle: Needle is the master part of the knitting machine. Needle receive yarn from the feeder, create a loop as well as release old loop and finally produce the fabric. Figure: Knitting Machine Needle
- 13. Cylinder Cylinder is another master part of the knitting machine. Cylinder adjustment is one of the most important technical work. The cylinder holds and carries needle, cam box, sinker etc. Figure: Cylinder
- 14. Cam Cam is the device which converts the rotary motion into a definite reciprocating motion for the needles and some other devices. Figure: Different Kinds of Cam
- 15. Cam Box Cam box holds and supports cam. Knit, tuck and miss cam are arranged horizontally according to fabric design in the cam box. Figure: Cam Box
- 16. Sinker Sinker is another master part of the knitting machine. It supports yarn to form the desired loop. Sinker is located at each and every gap of the needle. Figure: Sinker
- 17. Sinker Box Sinker box holds and supports the sinker. Figure: Sinker Box
- 18. VDQ Pulley VDQ means Variable Dia for Quality. As this pulley controls the quality of knitted fabric by adjusting GSM & stitch length during the knitting process, so it is called VDQ pulley. To increase the fabric GSM the pulley is moved towards the positive direction and to decrease the fabric GSM the pulley is moved towards the reverse direction. This pulley also called quality adjustment pulley (QAP) or Quality adjustment Disk (QAD). Figure: VDQ Pulley
- 19. Creel Creel is a vertical aluminum stick where creel is placed for holding the yarn cone. It also known as side creel. Figure: Creel
- 20. Memminger Positive Feed(MPF) MPF means Memminger Positive Feed. It receives yarn from aluminum telescopic tube. As this device gives a positive feed of yarn to the needles, so it is called Memminger Positive Feed device. MPF provides uniform tension to yarn, reduces machine stoppage, identify and remove yarn knot and give a signal if yarn breaks. Figure: MPF Device
- 21. Yarn Guide Yarn guide receive yarn from the MPF. It is used to guide the yarn and sent yarn to the feeder guide. It maintains the smooth tension on the yarn. Figure: Yarn Guide
- 22. Feeder Ring This is a circular feeder ring which holds all the feeder guide. Figure: Feeder Ring
- 23. Base Plate Base plate is a plate that holds the cylinder. It located on the machine body. Figure: Base Plate
- 24. Fabric Detector If fabric turn off or fall down from the machine, fabric detector touch the cylinder and the machine becomes stopped. It also called fabric fault detector. Figure: Fabric Detector
- 25. Automatic Needle Detector A device placed very close to the needle sets. It gives a signal if it found any broken damaged needle. Figure: Automatic Needle Detector
- 26. Adjustable Fan Generally two sets of running fans are continuously circulated from the center of machine dia. These fans are faced with the needle points that remove dust, hairy fiber as well as keep needle cool. Adjustable fans are rotated in the opposite motion of the cylinder. Figure: Adjustable Fan
- 27. Lubricating Tube This tube supplies lubricants to the cam box, sinker box to remove excessive friction and heat. Lubricants are sent through the tube with the help of an air compressor. Figure: Lubricating Tube
- 28. Spreader Spreader is situated below the machine body. It receives fabric from the needles,the spreads fabric and ensures uniform fabric tension.The spreader is adjusted as the fabric is open type or tube type. Figure: Spreader
- 29. Take-Down Motion Rollers These rollers are situated just under the spreader. They pull fabric from the spreader, grip fabric firmly and take fabric down. These rollers also called fabric withdraw rollers. Figure: Take-Down Motion Rollers
- 30. Winding Roller This roller is situated just under the take-down motion rollers. It rolled the fabric itself. When this roller becomes bigger by the fabric layer it also moves upward. Figure: Winding Roller
- 31. SOME COMMON CIRCULAR KNITTING MACHINE MANUFACTURING COMPANY ● Mayer & Cie. GmbH & Co. K ● Fukuhara ● Hanma group ● Jiunn long ● Zentex ● Masa (Taiwan) ● Ta-yu (Taiwan) ● Fukahama
- 32. Conclusion Modern circular knitting machines feature on-board computers (CPU) complete with a display and a keyboard to monitor and control the most important functions: Speed Number of machine revolutions (R.P.M) Working hours Causes of machine stops Detector of the yarn length fed into the machine On modern microprocessor-controlled machines, the LCD display (TOUCH SCREEN) is equipped with an alphanumeric keyboard for entering the operator’s settings. The whole system is controlled by an electronic circuit which signals the status of the machine and the possible causes of machine stops by means of flashing lights.
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