Electronic Interlock Circular Knitting Machine: Parts, Knitting Action & Cam System

Introduction:
Electronic interlock circular knitting machine had needles of two different lengths, long needles knitting in one cam-track and short needles knitting in a track nearer to the needle heads. All types of fabrics produced by the machine are widely used in producing underwear, varied sportswear and fashion fabrics and industrial fabrics etc. Interlock structure are required two sets of needles arranged in horizontally and vertically. The horizontal needles places on the groove of dial and the vertical needles grooved on the cylinder. Both cylinder and dial needles circulated around the stationary cam. 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:

  • Brand: FUKUHARA
  • 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. Batch rollers
  2. Belts
  3. Break stop motion
  4. Clutches
  5. Cylinder
  6. Cylinder cams
  7. Cylinder needles
  8. Dial
  9. Dial cams
  10. Dial needles
  11. Machine parts:
  12. Motor
  13. Oiling and air following devices
  14. Pulleys and gears
  15. Sensors
  16. Take up rollers
  17. Yarn career
  18. Yarn guides

Interlock cam system:
In the below figure the cylinder and dial cam to produce one course of ordinary interlock fabric which is actually work of two knitting feeders.

cam system of interlock circular machine
Fig: Cam system of interlock circular machine

The dial cam system:

1 → Raising cam for tuck position only

2, 3 → Dial knock over cam

4 → Guard cam to compete the truck

5 → 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.

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

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

Knitting action of interlock machine
Fig: Knitting action of interlock machine

Conclusion:
The electronic 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 have learnt about parts, knitting action, cam system of electronic interlock circular machine. 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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