Elements of circular knitting machine

MD.AZMERI LATIF BEG

M. Sc in Textile Engineering

Specialized in Apparel Manufacturing,

Processing and Designing

1.Needle:

a. The bearded needle.

b. The latch needle.

c. The compound needle.

2.Cylinder Trick

3.Needle Detector

4.Sinker:

5.Sinker Ring

6.Cylinder

7.Cylinder Balancer:

8.Cam:

i. Engineering cams.

ii. Knitting cams.

a) Knit cam

b) Tuck cam

c) Miss cam

9.Cam Box

10. Creel11. VDQ Pulley 12. Pulley Belt 13. Brush14. Tension Disk 15. Inlet and Outlet Stop Motion 16. Yarn Guide17. MNF Wheel18. Feeder Ring 19. Positive Feeder 20. Lycra Attachment Device 21. Lycra Stop Motion22. Uniwave Lubrication23. Adjustable Fan24. Spreader25. Air Gun Nozzle

The standard version G0 is designed to withstand

the normal hook stress levels and is recommended in

cases where excessive stress occurs only rarely.

The special version G00 is a more favourite

alternative in case where frequent needle overloading

is anticipated or when a slightly open needle leads to

unacceptable striping in the fabric.

“The patented design reduces machine temperature and

energy consumption,increases needle life and is extremely

suitable for high machine speeds.”

• Substantially reduced carbon footprint.

• Energy consumption and machine temperature reduced by

up to 20 %.

• Significant increase in performance.

• Reduced oil consumption due to optimized lubrication.

Main characteristic features of a litespeed needle:

• Optimized needle shank geometry due to partial reduction

of the needle shank thickness in circular knitting needles.

• Reduced needle weight Shank geometry.

•Reduced friction

against the trick walls

•Less energy required

for needle movement

• Less oil fogging

•Reduced oil

requirement due to

optimized lubrication

•Up to 20 % lower

energy consumption

of the machine

•Less energy required

to lower the room

temperature

Benefits of LS(lite speed) Needles

Needle oil

Fig: Conventional needle

Improved oil distribution

Reduced oil resistance

Fig: litespeed needle

For example: Vota 78.60 G.02

The capital letter at the beginning of the word ( “V”), identifiesthe number of butts and the type of tail.

The first part (78 in the example) indicates the whole lengthrounded off to the mm

The second (.60 in the example) part indicates the gauge of theneedle in hundredths of mm (width of the needle).

The first capital letter indicates the needle manufacturer (G forGroz-Beckert).

The next number is used to distinguish a specific needle amongall the needles produced by the same manufacturer.

For other needles, the latch fixing method is indicated by a “0”before the last number.

A “0” indicates that the latch has been fixed with a standardpressed pin; no “0” means that the latch has been fixed with ascrew pin.

The sinker is the second primary knitting element (the needlebeing the first). It is a thin metal plate with an individual ora collective action operating approximately at right anglesfrom the hook side of the needle bed, between adjacentneedles.

Functions:It may perform one or more of the following functions,

dependent upon the machine’s knitting action andconsequent sinker shape and movement:

Loop formation Holding-down Knocking-over

Cam is the second primary knitting element. The camsare the mechanical devices which convert the rotarymachine drive into suitable reciprocating action forthe needles or other elements. Because all needleshave a reciprocating action either serially or seriatim,except on the bearded needle sinker wheel and loopwheel frames where the fixed needle circle merelyrevolves. The cams are carefully profiled to produceprecisely-timed movement and dwell periods and areof two types:

i. Engineering cams.ii. Knitting cams.a) Knit camb) Tuck camc) Miss cam Fig: Knit, Tuck & Miss Cam

Power Supply 24V (20-33 V) 50/60 Hz

Run signal (machine is running) 10 – 30 V AC

Max. power 72 VA

Displacement per pump stroke 4.2 – 25 mm³

Adjustable oil dose per lubrication point: 0.3 – 24 ml/h

Max. oil consumption (with all nozzles operating):

Pulsonic (12 oil outlets) 288 ml/h

Pulsonic (24 oil outlets) 576 ml/h

Oil reservoir capacity: 3.5 litre

Weight: 3 kg (approx.)

With optional NKS needle head lubrication the following

are also required:

Compressed air supply 3 bar (max.) (dry - no condensate)

Compressed air consumption at 1.5 bar 0.5 N m³/h for 3 NKS nozzles

Technical data

Effect of knitting elements on different types of fabrics















