Pattern Mechanism of Tricot Warp Knitting Machine

Experiment Name: Study on pattern mechanism of Tricot warp knitting machine.

Introduction:
The warp knitting machine is a knitting m/c where the loops are formed in course wise direction and the fabric produced is in open width form. In Tricot warp knitting m/c compound needles are used. The warp yarns are feed to the needles through guide bars using shogging and swinging motion which is done by patterning drum and chain links with a mechanism called patterning mechanism.

M/C 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 

Patterning mechanism:
The shogging movement is initiated by varying the radius of the continuously turning pattern shaft either in the form of different heights of pattern links which poses over a pattern drum attached to the shaft or in the form of carefully shaped solid metal circular cams, termed pattern wheels, attached to it. An increase in height one link to the next produces a thrust against the end of the guide by shogging it positively into the m/c a decrease will produce a negative shog towards the pattern shaft as the result of the action of a return spring. A constant height will produce no shog if the guide bar will continued to swing through the same needle space. The periphery of the pattern wheel or chain track is scanned by a roller which is link by a flexible jointed push-rod to the end of the guide bar. The under side of the rod near the roller is supported on the side with moves freely or a metal surface as shogging occurs.

Conclusion:
By this experiment I learned about the Tricot warp knitting m/c and their several parts with pattering mechanism and chain links. This is a modern m/c and so this experience will help me in my future practical life.

Four Truck Single Jersey Circular Knitting Machines

Experiment name: Study on four truck single jersey circular knitting m\c.

Objects:
—To identify the four truck single jersey circular knitting m\c.
—To know about it’s different parts.
—To know the function of it’s different parts.
—To know the operation of this m\c.

Identification:
1. Cylinder is open, no dial.
2. Cylinder & sinker plate are present.
3. Close cam box.
4. Cylinder can not be seen.
5. Needle can not be seen.
6. Positive cam system.
7. Positive feed system. 

Specification of the machine:

1. Machine no:-1. 4-Truck Single Jersey Circular Knitting Machine.
2. Company:- PAOLO ORIZIO.
3. Origin of the machine:- ITALY.
4. Model no. :- GOH N/C.
5. Dia of the machine:- 22”.
6. Gauge of the machine:- 24 
7. No of Feeder:- 66 
8. No of Needle: Π*24*22.
9. Creel Capacity: 144.
10. Sinker type: 2061905G.

Main parts:

1. 4(butt) latch needle,
2. Holding down sinker,
3. Cam &cam box,
4. Sinker plate& sinker cam plate,
5. Cylinder,
6. Feeder(+ve)
7. Needle detector,
8. Fabric detector,
9. V.D.Q. pulley,
10. Spreader,
11. Take down roller,
12. Cloth roller.

Description: 

The single jersey circular knitting m/c is one of the modern m/c. It has one set of needle and another set of sinkers. Both needle and sinkers have different cam system. Cam system are stationary and the cylinder with needle and sinkers are movable. The yarn feeder is stationary. The yarn is coming from cheese or cone package by yarn guide, north catcher, accumulator and yarn guide or feeder. The fabric draw off by the side of the needle and it take up by take up roller. There is alighting system to inspection the fabric. The m/c has positive feed system and breakage indicator.

Operating Principle: 

As the m\c is modern, it has a control panel of it’s own. In a switch box three switches are available. One is for full sewing, one is for m\c stop & another is for machine motion. By the inching motion switch, the m\c can be run slowly or fastly. Beside this switch box another control panel is available. It has different functions, switches as F1.F2……f6 have their particular functions.

Conclusion: 

In circular knitting m/c there many set of cams but in V-bed knitting m/c there only one set of cam for each bed. From this practical we learn about the cams of V-bed knitting m/c and their function. We also learn how can we change design of loops as well as fabric by changing can arrangement. I think this practical will help me in future.

Crochet Warp Knitting Machine

Experiment name: Study on Crochet Warp knitting machine.

Objectives:

• To get clear concept about the driving mechanism of crotchet knitting machine.
• To know the functions of different parts of the machine.
• To know about the different motions of the machine.
• To know different parts of the machine.
• To improve our technical knowledge.

Specification of the machine:

1. Company: DAH HEER Industrial Co. LTD.
2. Brand: DAHU.
3. Origin: Taiwan.
4. Model No: L
5. Size: 15 G

Main parts: 

1.  Motor 
2.  Main shaft 
3.  Size lever 
4.  Shogging motion lever 
5.  Weft yarn guide bar 
6.  Warp yarn guide bar 
7.  Needle bar 
8.  Needle 
9.  Pressure roller 
10. Take up roller  
11. Ratchet wheel

Machine description:
The machine is driven by an electric motor. Motion is transferred to the machine parts by gear and toothed belt. Here weft yarn guide bar gives to and fro motion and shogging motion. Shogging motion lever give motion to the weft yarn guide bar. Shogging motion is driven from motor by main shaft. Needle bar and warp yarn guide bar also give to and fro and shogging motion by the same mechanism.Take up roller has ratchet wheel, by which take up roller gets motion from the motor by pushing pawl amd some mechanism.

Conclusion:
First of all I would like to offer my heartily thanks to our supervising tutor and the lab assistants for their consistent help to complete the study properly. Crotchet knitting machine is one of the most important knitting machines to produce knitted fabric.

Mechanical Interlock Circular Knitting Machine

Experiment name: Study on Mechanical Interlock Circular Knitting Machine.

Objectives:
To know about the different parts of this machine.
To learn the functions of these parts.
To know the knitting technique of interlock m/c.
To learn the characteristics of the interlock circular knitting m/c

Introduction:
Interlock structure is a double faced Interlock structure which consists of two 1×1 Interlock structures. These two 1×1 Interlock structures are joined by interlocking sinker loops and thus produce interlock structure. Interlock structure is produce by special cylinder & dial circular machines. Double system Tricot flat knitting machine also used to produce interlock structure.

Machine specification:
Brand: MYK
Model: FILS
Origin: Japan
Manufacturing company: MIYAKE KNITTING MACHINE W. LTD.
Manufacturing year: 1965
Serial: 1289/3
Dia of cylinder: 17 inch
Needle Gauge: 20
No of feeder: 20
No. of needle: 204
Motor Rpm: 1430

Machine description (Yarn to fabric path diagram):
Yarn from package set in the creel comes into m/c with the help of the guide & tensionar. With the help of feeder yarn is feed to the needles of cylinder & dial. Then yarn in fabric from comes to take down roller & lastly cloth roller.

Machine parts:  

1.  Yarn career 
2.  Break stop motion 
3.  Yarn guides 
4.  Dial 
5.  Cylinder 
6.  Dial cams 
7.  Cylinder cams 
8.  Dial needles 
9.  Cylinder needles 
10. Oiling and air following devices 
11.  Spreader 
12.  Take up rollers 
13.  Batch rollers 
14.  Motor 
15.  Belts 
16.  Pulleys and gears Clutches

Operation Principle:
The yarn is supplied from cone, placed either on an integral over head bobbin stand or one free standing creel through tensioners stop motion & guide eyes down to the yarn feeder guides.

The fabrics is tube form is drawn downwards from inside the needle cylinder by tension rollers & is wound on to the fabric batching roller of winding down fabrics.

The winding down mechanism revolves in unison with the cylinder & fabrics tube & in rock lever operated via cam followers running on the underside of a profiled cam - ring.

The sinker cam plate is mounted outside on the needle circle, the center of the cylinder is referred to as an open top or sinker top m/c.

Interlock cam system:
In the figure the cylinder and dial camming to produce one course of ordinary interlock fabric which is actually work of two knitting feeders.

The cylinder cam:
• A → clearing cam which lifts the needles to clear the old loop
• B, C → stitch cam and guard cams respectively both vertically adjustable to control the stitch length.
• D → up through to rise the needle whilst dial needle knock over
• E, F → guard cam to complete the truck
• G, H → guide cam to provide the track for idling needles

The dial system:
• 1. Raising cam for tuck position only
• 2, 3. Dial knock over cam
• 4. Guard cam to compete the truck
• 5. Auxiliary knock over cam to prevent the dial needle reentering the old loop
• 6, 7 Guide cams provides the tracks for idling needles
• 8.Sewing type clearing cam which may occupy the knitting position as shown in feeder 1 or in tuck position at feeder 2.

Knitting Action:
The knitting cycle of a interlock machine can be divided in to eight headings. They are discussed below,
• Position – 1: Rest position: The head of these needles are in the range of the knock over edges of cylinder & dial respectively.
• Position – 2: Tucking position of dial needle: The dial needles are brought into the tucking position.
• Position – 3: Tucking position: The cylinder needles are brought in the tucking position.
• Position – 4: Clearing position of dial needle: The dial needles are come into the clearing position.
• Position – 5: Clearing position: The cylinder needle are come into the clearing position.
• Position – 6: Yarn presenting position: Both cylinder & dial are moved to the yarn presenting position.
• Position – 7: Cast on position: Both cylinder & dial are moved to their cast on position.
• Position – 8: Knock over position: Both cylinder & dial are reaches to the knock over position.

Conclusion:
The circular Interlock machine is a very commonly used machine in country to make Interlock knitted fabric. So this experiment has significance in our study life. In this experiment we sketch the yarn path diagram of the machine, the knitting action, cam system. We point out the various specification of the machine. So the experiment helps us to know more. Above all the experiment is a successful one.

Electronic Interlock Circular Knitting Machine | Knitting Action ofInterlock m/c

Experiment name: Study on Electronic Interlock Circular Knitting Machine

Introduction:
Interlock structure is a double faced Interlock structure which consists of two 1×1 Interlock structures. These two 1×1 Interlock structures are joined by interlocking sinker loops and thus produce interlock structure. Interlock structure is produce by special cylinder dial circular machines. Double system V-bed flat knitting machine also used to produce interlock structure.

Machine specification:

Brand: FUKUHARA
Model: V8ME42
Origin: Japan
Manufacturing Company: Precision Fukuhara Works. Ltd.
Serial: 1352761
Dia of cylinder: 30 inch

Machine description:

The machine has two sets of needles on two different beds, one set on cylinder one in the dial bed. These two sets of needles must be exactly opposite to each other.

The machine has two separate cam system in each bed needles of different length called short needles and long needles. Each cam system controls half of the needles in alternate sequences. One cam system controls knitting at one feeder and other ca, system controls at the next feeders. T ale down mechanism is the same as the other Interlock and plain machines mechanism.

Machine parts:

1. Yarn career 
2. Break stop motion 
3. Yarn guides 
4. Dial 
5. Cylinder 
6. Dial cams 
7. Cylinder cams 
8. Dial needles 
9. Cylinder needles 
10. Oiling and air following devices 
11. Sensors 
12. Take up rollers 
13. Batch rollers 
14. Motor 
15. Belts 
16. Pulleys and gears  
17. Clutches

Interlock cam system:
In the figure the cylinder and dial cam to produce one course of ordinary interlock fabric which is actually work of two knitting feeders.

The cylinder cam:

A → clearing cam which lifts the needles to clear the old loop
B, C → stitch cam and guard cams respectively both vertically adjustable to control the stitch length.
D → up through to rise the needle whilst dial needle knock over
E, F → guard cam to complete the truck
G, H → guide cam to provide the track for idling needles

The dial cam system:

Raising cam for tuck position only

2, 3. Dial knock over cam
4. Guard cam to compete the truck
Auxiliary knock over cam to prevent the dial needle reentering the old loop
6, 7 Guide cams provides the tracks for idling needles
8. Sewing type clearing cam which may occupy the knitting position as shown in feeder 1 or in tuck position at feeder 2.

Knitting action:
The knitting cycle of a interlock machine can be divided in to eight headings. They are discussed below,

Position – 1: rest position
Position – 2: tucking position of dial needle
Position – 3: tucking position
Position – 4: clearing position of dial needle
Position – 5: clearing position
Position – 6: yarn presenting position
Position – 7: cast on position
Position – 8: knock over position 

Fig: Knitting action of interlock m/c

Conclusion:
The circular Interlock machine is a very commonly used machine in country to make Interlock knitted fabric. So this experiment has significance in our study life. In this experiment we sketch the yarn path diagram of the machine, show the knitting action, cam system. We point out the various specification of the machine. So the experiment helps us to know more. Above all the experiment is a successful one.