Electronic Interlock Circular Knitting Machine | Knitting Action of Interlock m/c

Experiment name: Study on Electronic Interlock Circular Knitting Machine

Interlock structure is a double faced Interlock structure which consists of two 1×1 Interlock structures. These two 1×1 Interlock structures are joined by interlocking sinker loops and thus produce interlock structure. Interlock structure is produce by special cylinder dial circular machines. Double system V-bed flat knitting machine also used to produce interlock structure.

Machine specification:

Model: V8ME42
Origin: Japan
Manufacturing Company: Precision Fukuhara Works. Ltd.
Serial: 1352761
Dia of cylinder: 30 inch

Machine description:

The machine has two sets of needles on two different beds, one set on cylinder one in the dial bed. These two sets of needles must be exactly opposite to each other.

The machine has two separate cam system in each bed needles of different length called short needles and long needles. Each cam system controls half of the needles in alternate sequences. One cam system controls knitting at one feeder and other ca, system controls at the next feeders. T ale down mechanism is the same as the other Interlock and plain machines mechanism.

Machine parts:

  1. Yarn career 
  2. Break stop motion 
  3. Yarn guides 
  4. Dial 
  5. Cylinder 
  6. Dial cams 
  7. Cylinder cams 
  8. Dial needles 
  9. Cylinder needles 
  10. Oiling and air following devices 
  11. Sensors 
  12. Take up rollers 
  13. Batch rollers 
  14. Motor 
  15. Belts 
  16. Pulleys and gears  
  17. Clutches
Interlock cam system:
In the figure the cylinder and dial cam to produce one course of ordinary interlock fabric which is actually work of two knitting feeders.

The cylinder cam:

A → clearing cam which lifts the needles to clear the old loop
B, C → stitch cam and guard cams respectively both vertically adjustable to control the stitch length.
D → up through to rise the needle whilst dial needle knock over
E, F → guard cam to complete the truck
G, H → guide cam to provide the track for idling needles

The dial cam system:

Raising cam for tuck position only

2, 3. Dial knock over cam
4. Guard cam to compete the truck
Auxiliary knock over cam to prevent the dial needle reentering the old loop
6, 7 Guide cams provides the tracks for idling needles
8. Sewing type clearing cam which may occupy the knitting position as shown in feeder 1 or in tuck position at feeder 2.

Knitting action:
The knitting cycle of a interlock machine can be divided in to eight headings. They are discussed below,

Position – 1: rest position
Position – 2: tucking position of dial needle
Position – 3: tucking position
Position – 4: clearing position of dial needle
Position – 5: clearing position
Position – 6: yarn presenting position
Position – 7: cast on position
Position – 8: knock over position 

Fig: Knitting action of interlock m/c

The circular Interlock machine is a very commonly used machine in country to make Interlock knitted fabric. So this experiment has significance in our study life. In this experiment we sketch the yarn path diagram of the machine, show the knitting action, cam system. We point out the various specification of the machine. So the experiment helps us to know more. Above all the experiment is a successful one. 
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Mazharul Islam Kiron is a textile consultant and researcher on online business promotion. He is working with one European textile machinery company as a country agent. He is also a contributor of Wikipedia.

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