A U T O

C O N E WINDING MACHINE

DANISH RAJA12TE62

12te62@student.muet.edu.pkDanish_raja1@hotmail.com

Introduction Auto cone can be defined as “ It is a type of winding machine

in which ring bobbins are converted into large cones with removing of spinning faults.

In order to form packages of the right weight for subsequent processing stages, the winding machine can be fed by ring-spun yarn bobbins.

Packages can thus be subdivided according to their shape:

a. Cylindrical

b . Conical, with tapers ranging from 5° 57° to 9° 15°

c . Cones with tapers of up to 4° 20° The yarn unwound from the package passes through yarn

tensioning and control systems. with the help of a grooved cylinder, yarn is wound evenly

around the large package.12te62@student.muet.edu.pk

The yarn enters the recess in the cylinder, thus the rotary movement of the cylinder corresponds to the translation of the yarn.

Winding machines currently have independent heads with individually adjustable motors.

A modern winding machine can process yarns ranging from a count of Ne 2 to finer ones, at a winding speed of 400 to 2000 m/min.

Further functions of winding are to check the yarn and to eliminate any faults found. This is done by a process called “clearing” i.e., by passing the yarn through an electronic device, known as a yarn clearer which assesses it according to set parameters (fault section and length).

If these set values are exceeded the yarn is cut and spliced - a splice being deemed preferable to a fault.

Splicing is done using the air-splicing system or the Twin splicer system.

12te62@student.muet.edu.pk

The machine is equipped with

a special device to avoid the

winding defect known as

rib boning. This problem is caused by

irregular package formation

following the deposition of too

many coils in certain points. Basically, the package-holding

arm is made to effect an

oscillating movement both in the

vertical (A) and in the horizontal

(B) planes (see Figure 35.2). A modern winding machine

carries out the following

operations automatically;

1. Package doffing

2. Bobbin loading

3. Cone feeding

4. Linkage to spinning frames with bobbin picking up

Click icon to add picture

Waxing serves to lubricate the

yarn, reducing to a minimum its

coefficient of friction with the

parts. with which it comes into

contact.

This operation is normally carried

out on yarns destined to be

processed on knitwear machines,

on which smooth running of

yarns is essential.

Waxing is carried out on the

winding machine, which is

equipped with a positive-drive

adjustable waxing system that

guarantees constant waxing of

the yarn.

OBJECTIVES OFWINDING Requirement of atmospheric

conditions of auto cone department

To prepare a bigger

package (cone) from ring

bobbin with specific length and weight.

To remove spinning faults.

To wax or condition the

material.

To improve the quality of

yarn.

In auto cone department the humidity and temperature are maintained according to the requirement throughout the year.

Normally ranges are:- Humidity%

55~80% Temperature

22~39.5°C

Parts of Auto coneCradle: Its function is to provide setting to cones/packages having package holders; it lies on the upper part of the machine on drum.

Drum: It is a polished surface metallic drum slightly cone type, having different diameter at both sides i.e 90 mm on one side and 100 mm on other side. It has cut marks or grooves cut in to it at its surface to help the cross winding of packages. Its speed lies in range from 1000 to 2000 rpm.

Magazine: Magazine is the main component of auto cone machine, its function is to hold/feed the cops for winding, its capacity lies up to 9 bobbins/cops per magazine. Bobbins are fed to bobbin peg one by one automatically, when one becomes empty and ejected from peg.

Tension assembly: Tension assembly provides sufficient tension to the yarn during unwinding from cop to winding on to cones. Due to this sufficient tension is developed on cones and hence dense packages can be formed.

Yarn clearer: As the spun yarn have various faults i.e thin and thick places, neps, hairiness, embedded particles of dust & leaves colouring matters and short and long defects etc .Its function is to remove these faults according to the given set values on electron touch screen panel to produce fault free yarn to meet the quality requirements.

Tensor cutter: The purpose of cutter is to cut the yarn whenever required during winding process.

Balloon breaker: Its function is to break the balloon/control the length of yarn balloon during yarn unwinding from the cop, because yarn is passes at high speed during winding operation and hence high tension developed. Therefore that tension becomes equalized by balloon breaker.

Waste suction pipe: During yarn cutting and splicing it sucks the waste yarn.

Bobbin plate: The function of bobbin plate is to rotate the bobbins one-by-one.

Bobbin peg/holder: It is a disk type wheel; its function is to hold the filled bobbins for unwinding process.

Lower scissor: When bobbin is completed it cut the yarn.

Upper scissor: Its function is to take out yarn from lower scissor toward it self.

Tension dip: Tension dip is employed to give tension at yarn.

Wax bush: To provide smooth surface to yarn wax is applied especially to the yarn intended for knitting, the function of wax bush is to apply wax to yarn to make its hairs sticky.

Wax motor: Its function is to run wax bush continuously.

Pre-cleaner: Its function is to gauge the yarn according to the requirements of count for instance; Ne. 16’s gauge =1.2 mm, Ne. 20’s = 1.0 mm & Ne. 30’s = 0.8mm

Center flip: Its function is to provide path during bobbin change when one bobbin is completed.

Mobile pipe: It sucks the yarn when it is break at the center.

Suction mouth: Whenever yarn breaks during winding the package move in opposite direction with slow speed during that time it sucks the broken yarn end from the package and take it for splicing.

Retie pipe: It take the yarn end from bobbin to ward splicing mechanism.

Splicer: The splicing mechanism performs the knot free joining of the two yarn ends after yarn breakage or during any cutting operation for removal of faults.

Hairiness nozzles: Hairiness nozzles are used to reduce yarn hairiness.

Dust removal unit: It collects the dust and fiber fly.

Working Principle of Auto cone The filled ring bobbins are placed in magazine and the end of each bobbin

yarn is putted into the suction head of magazine for each spindle. The

cones having some yarn wound upon them are also placed in to the holder

of cradle on each spindle after that the spindle start running, the peg

comes forward under the bobbin and bobbin falls upon it on the bobbin

plate through centre flip. After this the Retie pipe takes the yarn from

finger plate towards the splicing mechanism where it is joined with

another end of yarn which is caught by the suction mouth from cone,

during its reverse movement.

When unwinding of the yarn from ring bobbin starts it passes through

balloon breaker whose function is to reduce the centrifugal forces acting

upon the yarn, tension and rubbing of yarn with ring bobbin. Position of

the balloon breaker depends upon the count of the yarn, for course count

more height and for fine count less height is required. Yarn tension

imparts great contribution towards package (cone) stability.

After the tensioning unit yarn is passed through the waxing device, this

device operates whenever waxing is required. Quantity of wax depends

upon washer per pin. After this waxing unit yarn is passes through slub catcher, when the weight

of the standard length deviates from the standard limits then it cuts the

yarn. After slub catcher the yarn is passes through splicing unit to make a knot

free joint of the yarn after each breaking and cutting action. During change

of bobbin, yarn breakage or cutting of yarn the Retie pipe and suction mouth

catch the corresponding ends of yarn and bring them to splicing unit, after

joining the respective scissor cut the remaining yarn end. It should be keep in

mind that before splicing the yarn ends are prepared for splicing/joining by

suction. After splicing unit the yarn is passes to cone through drum having grooves in it

for cross winding. When required size of the package is reached spindle stops

automatically and filled package is replaced with an empty one. So, in this way

winding is done.

THANKS………….