Study on functions of different parts of circular knitting machine.pptx (1)

PRESENTATION ON
STUDY ON FUNCTIONS OF DIFFERENT PARTS OF
CIRCULAR KNITTING MACHINE.

Supervised By
Md.Nazif Hasan Chowdhury
Lecturer,
Department of Textile Engineering
Port City International University
Prepared By
Sany Barua
(BTE-01305886)

02
01
03
04
05
06
INTRODUCTION
DIFFERENT TYPES OF SET NEEDLES
DIFFERENT TYPES CIRCULAR KNITTING
MACHINE
MACHINE PARTS
FUNCTION OF DIFFERENT PARTS
CONCLUSION

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.

DIFFERENT TYPES OF
SET NEEDLES

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.

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.

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.

Different circular knitting machine parts and their
functions are given below:
Figure: Circular Knitting Machine

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

Machine Parts:
19. Lycra Stop Motion
20. Uniwave Lubrication
21. Adjustable Fan
22. Spreader
23. Air Jet Nozzle
24. Lycra Attachment Device

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

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

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

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

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

Sinker Box
Sinker box holds and supports
the sinker.
Figure: Sinker Box

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

Creel
Creel is a vertical aluminum
stick where creel is placed for
holding the yarn cone. It also
known as side creel.
Figure: Creel

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

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

Feeder Ring
This is a circular feeder ring
which holds all the feeder
guide.
Figure: Feeder Ring

Base Plate
Base plate is a plate that holds
the cylinder. It located on the
machine body.
Figure: Base Plate

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

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

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

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

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

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

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

SOME COMMON CIRCULAR KNITTING
MACHINE MANUFACTURING COMPANY
● Mayer & Cie. GmbH & Co. K
● Fukuhara
● Hanma group
● Jiunn long
● Zentex
● Masa (Taiwan)
● Ta-yu (Taiwan)
● Fukahama

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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