Mechanical Interlock Circular Knitting Machine

Experiment name: Study on Mechanical Interlock Circular Knitting Machine.

  • To know about the different parts of this machine.
  • To learn the functions of these parts.
  • To know the knitting technique of interlock m/c.
  • To learn the characteristics of the interlock circular knitting m/c
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 Tricot flat knitting machine also used to produce interlock structure.
Mechanical Interlock Circular Knitting Machine
Machine specification:
  • Brand: MYK
  • Model: FILS
  • Origin: Japan
  • Manufacturing company: MIYAKE KNITTING MACHINE W. LTD.
  • Manufacturing year: 1965
  • Serial: 1289/3
  • Dia of cylinder: 17 inch
  • Needle Gauge: 20
  • No of feeder: 20
  • No. of needle: 204
  • Motor Rpm: 1430
Machine description (Yarn to fabric path diagram):
Yarn from package set in the creel comes into m/c with the help of the guide & tensionar. With the help of feeder yarn is feed to the needles of cylinder & dial. Then yarn in fabric from comes to take down roller & lastly cloth roller.

Machine parts:
  • Yarn career
  • Break stop motion
  • Yarn guides
  • Dial
  • Cylinder
  • Dial cams
  • Cylinder cams
  • Dial needles
  • Cylinder needles
  • Oiling and air following devices
  • Spreader
  • Take up rollers
  • Batch rollers
  • Motor
  • Belts
  • Pulleys and gears Clutches
Operation Principle:
The yarn is supplied from cone, placed either on an integral over head bobbin stand or one free standing creel through tensioners stop motion & guide eyes down to the yarn feeder guides.

The fabrics is tube form is drawn downwards from inside the needle cylinder by tension rollers & is wound on to the fabric batching roller of winding down fabrics.

The winding down mechanism revolves in unison with the cylinder & fabrics tube & in rock lever operated via cam followers running on the underside of a profiled cam - ring.

The sinker cam plate is mounted outside on the needle circle, the center of the cylinder is referred to as an open top or sinker top m/c.

Interlock cam system:
In the figure the cylinder and dial camming to produce one course of ordinary interlock fabric which is actually work of two knitting feeders.
Interlock cam system
Interlock cam system
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 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.
Knitting Action:
The knitting cycle of a interlock machine can be divided in to eight headings. They are discussed below,
  • Position – 1: Rest position: The head of these needles are in the range of the knock over edges of cylinder & dial respectively.
  • Position – 2: Tucking position of dial needle: The dial needles are brought into the tucking position.
  • Position – 3: Tucking position: The cylinder needles are brought in the tucking position.
  • Position – 4: Clearing position of dial needle: The dial needles are come into the clearing position.
  • Position – 5: Clearing position: The cylinder needle are come into the clearing position.
  • Position – 6: Yarn presenting position: Both cylinder & dial are moved to the yarn presenting position.
  • Position – 7: Cast on position: Both cylinder & dial are moved to their cast on position.
  • Position – 8: Knock over position: Both cylinder & dial are reaches to the knock over position.
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, 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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