Study on Warp Knitting Machine

An experiment of modern knitting technology.

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Sessional on TE3203
TE3204


Year-2021
FABRIC MANUFACTURING
ENGINEERING -II
LAB REPORT

Submitted By
Nazmul Hasan Anan
Roll-1721015
Year-3
rd
Term-2
nd

Submitted To
Md. Abdul Alim
Lecturer
KUET

Experiment No-04
Name of the Experiment: Study on Tricot Warp Knitting Machine-I)Yarn Path Diagram
II)Machine Parts

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Experiment No-04
Name of the Experiment: Study on Tricot Warp Knitting Machine
I) Yarn Path Diagram
II) Machine parts

Introduction
Warp knitting machine is one kind of flat bed machine. This machine
produces the knitted loops in wales direction. There are two major classes
of warp knitting machine. They are the ‘Tricot’ & the ‘Raschel’ warp
knitting machine. The ‘Tricot’ warp knitting machine is also termed as
automatic warp knitting of its function.
Objectives
 To know about the yarn to fabric path diagram of Tricot warp knitting
machine.
 To know about the name of the different parts of the machine.
 To know about the functions of these parts.
 To know operational process of tricot warp knitting machine.

Apparatus
I. Machine (Tricot Machine)
II. A4 Paper
III. Pencil/Pen

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IV. Sharpener
V. Eraser
VI. Ruler
VII. Calculator
Experimental Procedure
Main Parts of the Machine:
1. Compound needle.
2. Pattern chain
3. Needle bar
4. Pattern drum
5. Guide bar
6. Main shaft
7. Sinker & sinker bar
8. Intermediate shaft
9. Sliding latch
10. Let-off mechanism
11. Sliding latch bar
12. Take-up mechanism
13. Comb
14. Machine A/C
15. Cloth roller
16. Toothed belt/Timing belt
17. Link

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18. Warp beam
19. Rocker shaft
20. Bottom Beam
Machine Specification:
1. Brand: LIBA
2. Origin: W. Germany
3. Manufacturing Company: MASCHINEN FABRIK, NAILA.
4. Manufacturing Year: 1991
5. Width: 84 inch/ 213 cm
6. Type: COP 2K
7. Gauge: 28
Machine Description:
Compound needle is used in the machine. With the help of the pattern
drum and the chain link the patterning is done. The gears are merged in
oil bath for smooth operation. There are two back beams for yarn supply.
The yarns come through guide bar and through the needle the cloth is
taking down by cloth roller.

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Yarn to Fabric Path Diagram of Tricot Warp
Knitting Machine:


Fig: Yarn to fabric path diagram of Tricot warp knitting machine

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Working Principle:
1. Compound needle: In Tricot warp knitting machine compound needle is
used. To form loop and produce the fabric is the main function of the
needle.
2. Needle bar: A needle bar is used in this machine. The main function of
it is to hold the needles together and helps the needles to move unison
while loop forming.
3. Guide bar: Guide bar is used in this machine to guide the yarn properly
to the needle. It feeds the yarn around the needle and controls the rate of
warp feed from the warp beam by making lapping movement.
4. Sinker and Sinker bar: In the tricot warp knitting machine tricot sinker
is used to hold down the loops produced by the needles. The sinker bar
keeps the sinkers together to move unison while knitting. The main
function of the sinker is to hold down, knock over and supporting the fabric
loops.
5. Sliding latch: In warp knitting machine compound needles are used. A
sliding latch is used here to close the hook while knitting.
6. Sliding latch bar: In warp knitting machine the sliding latches remain
unison. The latch bar keeps the latches together and helps it to move unison
while knitting.

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7. Cloth roller: The produced fabric is wound on the cloth roller.
8. Let-off mechanism: The process of releasing the warp yarns according
to the requirement of the machine and speed of cloth roller is the main
function of let-off mechanism.
9. Take up mechanism: It helps the produced fabric to wound on the cloth
roller in proper tension. There are 3 take-up r/r in this machine. It also
gives proper tension to the warp sheet and controls the speed of warp beam.
10. Link: In the warp knitting machine the link is used to make design in
the knitted fabric. The different links used here has different thickness and
thus it helps to produce design.
11. Pattern chain: The pattern chain is the chain of links joined with each
other. The pattern chain helps the machine to produce design.
12. Pattern drum: It is a drum, which gives motion to the pattern chain.
There are groove on it and the pattern chain is placed on it. It gets motion
from the machine driving motor through gearing.
13. Comb: In this warp knitting machine the comb is used to separate the
warp yarns coming from the warp beam. It works as the reeds of the
weaving machine and also controls the fabric width.
14. Warp beam: In this warp knitting machine warp beam is used to
supply the warp yarns parallel. There are 8-warp beam in this machine. 4

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beam are on the upper side and 4 are to the downside. These beams are not
so big as the weavers beam.
15. Machine A/C: The machine a/c is one kind of cooling device, which
keeps the machine parts and the motor from overheating and damage while
running continuously.
16. Main shaft: The main shaft of this machine gives the machine motion
from the motor.
17. Lubrication: The machine has automatic lubrication system.
18. Controlling unit: The controlling unit is used to control the machine
easily. It has a digital control unit.
19. Toothed belt: In this machine the toothed belts are used to transfer
motion without any slippage.
Discussion
In this experiment we learn about the yarn path diagram and machine parts
of Tricot warp knitting machine. We learn about the machine parts and their
operation during knitting action. During experiment, we should observed
the machine settings carefully. For further knowledge we can use manual or
catalogue which is provided with the machine.

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Conclusion
In our lab, the machine which is used is not a machine of industrial scale.
Here we only get a primary idea about Tricot warp knitting machine. The
primary idea can help us in future application of industrial scale. By this
experiment we may learn how to change the design, how to operate the
Tricot warp knitting machine which helps us in our practical life.