What is a Circular Knitting Machine in Textile?
In textile knitting sector, knitting process is
classified into two, where one is warp knitting and another one is weft
knitting. A circular knitting machine is a device which is used to produce weft
knitted fabrics in a semi or fully automated fashion. This article is presented
a details discussion on circular knitting machine with its machine parts,
machine types, applications etc.
You may follow: Key Features of Knitting Machine
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Fig: Circular knitting
machine parts
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Main Parts of Circular Knitting
Machine:
Major parts of
a circular knitting machine are listed in the following:
1.
Legs,
2.
Cylinder,
3.
Dial,
4.
Needle,
5.
Cam Parts,
6.
Feeder guide,
7.
Cam,
8.
Supply Package,
9.
Creel,
10.
Top Stop motion,
11.
Anti Snarl Device,
12.
Tensioner,
13.
Positive feeder,
14.
Knitted fabric,
15.
Fabric spreader,
16.
Fabric withdrawal roller,
17.
Fabric winding roll.
You may follow: 12 Key Difference Between Latch Needle and Bearded Needle
Types of Circular Knitting Machine:
There are various types of circular knitting machines used for producing knit fabric. Those are-
Types of Circular Knitting Machine:
There are various types of circular knitting machines used for producing knit fabric. Those are-
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Fig: Circular knitting
machine types
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Process Flow Chart of Circular
Knitting Machine:
Yarn in the form of
package
↓
Placing the yarn package in the
creel
↓
Feeding the yarn
↓
Set the machine as per GSM
& design
↓
Knitting
↓
Withdraw the roll fabric and
weighting
↓
Roll marking process
↓
Checking or Inspection
↓
Numbering
This type of machine is used
for producing fabrics of Jackets, sports & T-shirt, ladies tops, casual
wear, suits, dresses, bath robes, swimwear, dressing gowns, track suits,
furnishing, upholstery, jogging suits, automotive & technical fabrics, and
household fabrics.
Advantages of Circular Knitting Machine:
Some key advantages of circular knitting machine are presented in the following:
1.
Smooth passing of Needles between cylinder and cams.
2.
Better quality of plated fabric.
3.
Fewer loads by high precision.
4.
Life time guaranty of Ceramic yarn carrier.
5.
Less friction for each part.
6.
Longer needle’s life.
7.
Save power consumption.
8.
Fantastic Machine Speed.
9.
Perfect gaps between all parts.
10.
Immediate restart after setting.
11.
Awesome Specification of Rib.
12.
Save maintenance cost.
13.
Longer needle life.
14.
Special servomotor for take-up system.
You may follow: Difference Between Warp Knitting and Weft Knitting in Textile
List of Knitting Machine Used in Textile Industry:
Mostly used knitting machines are listed in the below:
List of Knitting Machine Used in Textile Industry:
Mostly used knitting machines are listed in the below:
1.
Four truck single jersey circular knitting machine,
2.
Electronic interlock circular knitting machine,
3.
Rib circular knitting machine,
4.
Mechanical interlock circular knitting machine,
5.
V-bed knitting machine,
6.
Interlock circular knitting machine,
7.
Automatic socks knitting machine,
8.
Linking machine,
9.
Jacquard circular knitting machine,
10.
Collar cuff v- bed automatic knitting machine,
12.
Hand socks knitting machine,
13.
Straight bar frame knitting machine,
15.
Single truck single jersey circular knitting machine.
Study on Single Jersey Circular Knitting
Machine in Textile:
Single jersey circular knitting
machine is the most used knitting machine in textile knitting industry. In the
past we have discussed about the features of rib circular knitting machine. Today we will
discuss here about the common features of a single jersey circular knitting
machine or plain circular latch needle machine.
You may follow:
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Fig: Single jersey circular
knitting machine
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Key Features of Plain Circular Latch Needle
Machine Or Single Jersey Circular Knitting Machine:
Various key features of single
jersey circular knitting machine or plain circular latch needle machine has
presented in the below:
1.
Singular jersey circular knitting machine normally has rotating
(clockwise) cylindrical needle bed (s).
2.
Single jersey fabric is produced by the plain circular latch
needle machine.
3.
One set of latch needle is used in single jersey circular knitting
machine.
4.
Latch needle, cylinder and sinker ring revolve through the
stationary knitting cam systems.
5.
Normally stationary angular cam systems are used for needle and
sinker.
6.
Stationary yarn feeders are situated at regular intervals around
the circumferences of the cylinder.
7.
For single jersey circular knitting machine, holding down sinkers
are used, one between every needle space.
8.
From the cones, yarn is supplied and placed either on an integral
overhead bobbin stand or on a free standing creel through tensioners, stops
motions and guide eyes down to the yarn feeder guides.
10.
In these types of knitting machine, knitted fabric is in tubular
form which is drawn downwards from inside the needle cylinder by tension
rollers and is wound onto the fabric batching roller of the winding down frame.
11.
The winding down mechanism revolves in rack over with the fabric
tube.
12.
As the sinker cam plate is mounted outside on the needle circle,
the center of the cylinder is open and the machine is referred to an open top
or sinker top machine.
Stitch Formation Technique of
Spring Latch Needle in Knitting Sector:
This type of needles has a rigid hook and
latches which easily turning around the axis. It is mostly used in weft knitting machine. Here, the stem carries the knitted loop in the
rest and clearing position. In another article I have shared loop formation
or stitch formation technique of spring bearded needle. But now, i have presented here the loop
formation technique of spring latch needle.
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Knitting action of latch
needle in textile knitting industry
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Loop Formation Technique of
Spring Latch Needle in Textile Knitting:
The loop formation process in a single needle
bed or single jersey knitting machine is illustrated in figure.
The stitch formation process is divided in to
ten operations. Those ares-
1.
Clearing,
2.
Yarn lying or feeding,
3.
Under lapping or yarn drawing,
4.
Pressing,
5.
Landing,
6.
Joining,
7.
Casting off or knocking over,
8.
Loop forming,
9.
Sinking,
10.
Loop draw off.
All the above operations have
explained in the below:
1. Clearing:
The process of formation loop started by
clearing operation in latch needle. Its aim is ti draw the old loop below the
latch. Sinker are constant and the latch is opened and
when the needle in high position then this clearing operation performed.
2. Yarn lying or feeding:
While the needle motion is downwards, the hook take hold
the yarn from yarn guide. Here, the new feed yarn stay below the hook.
3. Under lapping or yarn
drawing:
The laying yarn is fertilized in the hook and
the yarn is in tension when the needle comes down. In this situation, while the
needle moves downwards yarn lying and under lapping occurs instantaneously.
4. Pressing:
The aim of pressing is to close the needle hook
with the new feed yarn and needle moves downwards.
5. Landing:
Placed the old loop on the latch is called
landing. In latch needle machine, pressing and landing operation performed
instantaneously.
6. Joining:
Touching of new loops with the old loops is
called joining. In this stage, the needle comes downwards.
7. Casting off or knocking
over:
The old loops is completely release from the
hook and then it falls on the new loops and in this stage, the stem of needle
comes downwards too. Joining and casting off occurs simultaneously.
8. Loop forming:
Loop is formed here.
9. Sinking:
After making the loop its sink here for loop
drawing off.
10. Loop draw off:
By formation of new loops along the horizontal a
new course is made. By using take down mechanism, produced course is drawn
downwards. Then again the loop formation process start and the needle come up.
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