knitting technology

1. Welcome To My Presentation
Department Of Textile engineering
Presented By: Md: Feroz Mahmud
ID: 130103023

3. TYPES
THE BEARDED
NEEDLE
3 TYPES OF KNITTING
NEEDLES
THE COMPOUND
NEEDLE
THE LATCH
NEEDLE
the hook opening and
closing device
a system allowing the
needle to move and
form the loop.
the hook, which takes
and retains the
thread to be looped

4. FEATURES
• The bearded or spring needle
was the first type of needle to
be produced.
• It is the cheapest and simplest
type to manufacture as it is
made from a single piece of
metal
• The bearded needle is
essentially a frame needle, the
needles being fixed to move

5. PARTS
• The head, where the stem is turned into a hook
to draw the new loop through the old loop.
• The beard, which is the curved downwards
continuation of the hook that is used to
separate the trapped new loop inside from the
old loop as it slides off the needle beard.
• The stem, around which the needle loop is
formed.
• The eye, or groove, cut in the stem to receive
the pointed tip of the beard when it is pressed,
thus enclosing the new loop.
• The shank, which may be bent for individual
location in the machine or cast with others in a
metal ‘lead’.

6. BREADED NEEDLE AND KNITTING MACHINE PARTS

7. Knitting action

8. Advantages Limitation
• Less expensive
• Strain on yarn is less
• No possibility of fluff
or lint accumulation
on needle
• Good for warp
knitting machine
• Required an additional
element to close the
beard during knitting
• High wear and break
easily
• Limiting productivity
• A knitting section
occupies a considerable
amount of space
• Individual loop
formation has to be
achived by a loop forming
element, this leads to a

9. Characteristics
Latch Needle Characteristics:
1. Most widely used in weft
knitting.
2. More expensive needle than
the bearded needle.
3. Self acting or loop controlled.
4. Work at any angle.
5. Needle Depth determines the
loop length.
6. Variation of the height of
reciprocating produces knit, tuck
or miss stitch.

10. Features-hook
The Hook: The hook which draws and returns the
new loop.
The slot or Saw Cut: This slot receives the latch
blade.

11. Features
The Cheeks or Slot Walls: It is either punched or riveted to
fulcrum the latch blade.
The Rivet: The rivet which may be plain or threaded. This has
been dispensed with on most plated metal needles by pinching
the slot walls to retain the latch blades.
The latch blade: This latch blade locates the latch in the
needle.

12. Features
7. The stem: The stem of latch needle carries the
loop in the clearing on rest position.
8. The Butt: Butt of latch needle enables the needle
to be reciprocated.
9. The Tail: The tail is an extension below the butt
giving additional support to the needle and keeping
the needle in its trick

13. Knitting action
The rest position: The head of the needle hook
is level with the top of the verge of the trick. The
loop formed at the previous feeder is in the
closed hook. It is prevented from rising as the
needle rises, by holding-down sinkers or web
holders that move forward between the needles
to hold down the sinker loops.

14. Knitting action-latch opening
Latch opening: As the needle butt passes up the
incline of the clearing cam, the old loop, which is
held down by the sinker, slides inside the hook and
contacts the latch, turning and opening it.

15. Knitting action-clearing height
Clearing height: When the needle reaches the top
of the cam, the old loop is cleared from the hook
and latch spoon on to the stem. At this point the
feeder guide plate acts as a guard to prevent the
latch from closing the empty hook.

16. Knitting action-yarn feeding
Yarn feeding and latch closing: The needle starts to descend
the stitch cam so that its latch is below the verge, with the old
loop moving under it. At this point the new yarn is fed through
a hole in the feeder guide to the descending needle hook, as
there is no danger of the yarn being fed below the latch. The
old loop contacts the underside of the latch, causing it to close
on to the hook.

17. Knitting action-cast off
Knocking-over and loop length formation: As
the head of the needle descends below the top of
the trick, the old loop slides off the needle and the
new loop is drawn through it.

18. Knitting Action Of Latch Needle

19. Advantages Limitation
• Major advantages of being self
acting or loop controlled, so that
individual movement and
control of the needle enable
stitch selection to be achieved.
• Ideally suited for use with
computer controlled electronic
selection devise.
• Latch needle can operate at any
angle.
• Variation of the height of
vertical can produce knit, miss
and tuck loop which helps to
manufacture different design
fabrics.
• Latch needle are thick and
rigid, so any deflection id
design effect on fabric
• Needle deflection is difficult
• It imposes a certain strain on
yarn
• There is also possibility of
fluff or lint accumulation on
the latch due to rubbing of
the yarn on needle

20. Difference between latch and bearded needle
Latch needle Spring bearded needle
1. It contains a hook portion
at the top & a latch reverted
at certain distance from the
needle head.
1. This needle consists of a
top hook curved downwards
with a finished tip.
2. The main element of
knitting is latch.
2. The downward
continuation is called beard.
3. The latch needles are
self-acting.
3. The spring bearded
needles are not self-acting
type.
4. Do not need outside
agency to close the hook.
4. It requires pressure to
close the needle.

21. Difference between latch and bearded needle
Latch needle Spring bearded needle
5. Machine gauge is coarser
then spring bearded needle.
5. Machine gauge is finer then
latch needle.
6. This one is not simple type
needle.
6. Simple type of needle.
7. It has reduced stroke. 7. It has more stroke than
latch needle.
8. Most widely used in weft
knitting.
8. More widely used in circular
single knitting.
9. Complicated operating
system.
9. Easy operating system.
10. The latch needle is more
expensive & intricate needle.
10. The spring bearded
needle is less expensive than

22. Features
• Compound needles consist two separately controlled
parts- the open hook and the sliding closing element
(tongue, latch, piston, plunger)
• It is most popular in warp knitting machines
• Strain in not put on the yarn
• Both members of compound needle have a straight,
thus knitting speed can be increased.
• These needle are very expensive

23. Compound Needle Action

24. Wonderful knitted Fabrics