Foreign Part Separator(F.P.S)

Need of FPS Cotton received from the ginning mill in spinning, in the form of

heavily compressed bales are usually found to be contaminated with the large number of unwanted materials.

The machines of blow room i.e. bale opener, cleaners and openers and mixers and feeders have no provision of removing them while processing bale to finally lap or tuft.

So these materials are called “ Foreign particles” as they hamper the further processing in yarn preparatory, weaving, knitting or chemical processes.

Ideally speaking, we want these “foreign particles “ to be removed at quite an early stage during spinning.

So if we want to remove them the best location would be before conversion of lap/ tuft to the sliver.

If they are not removed during the conversion from lap/tuft to sliver, than at the latter stage as the thinning down process occurs, they would get more embedded and would be extremely difficult to identify them.

So foreign particles are removed by foreign part separators before feeding the material to card, as the material is in highly opened stage making the identification and removal an easy task.

Contaminants in Bale

Principle of FPS

There is a 3-fold module in foreign part separator. Each of the module has different identification areas. They are:-

1. F Module.2. P Module.3. UV Module.

The above three modules are explained in brief in the upcoming slides.

F Module This module consists of 2 CCD Cameras,

which detect following type of contaminants:-

1. White, non transparent PP parts.2. Yarn type and ribbon type foreign parts.

Basic variant SP-F

Foreign particle in the material entering the machine

Cross section of machine

CCD Camera

Nozzle Bar Opening

Roller

Material

As the white opening roller opens it, the particle is separated from the tufts and easily detected by the CCD camera.

The camera send the image to the processor and the respective nozzle bar is activated and it throws out the particle which is taken out my suction.

P-Module

P-Module basically stands for Polarized light. In this module, polarized light is used as the source to identify the contaminants.

Type of contaminants detected:-1. Light coloured or transparent plastic

foreign particles that are responsive to polarized light.

2. Those foreign particles having only slight contrast with good fibres.

Example:- poly propylene threads, films, plastic materials, etc.

•

Principle of P- Module:-  

We need here a setup consisting of 3 important things:-

1. Source of polarized light 2. A transport arrangement for the fibres to pass

through3. A detector device to collect the light received

from the material.

Unpolarized light

Polarizing filter polarizes the light and produces

polarized light

Polarized light passes through the material

It get elliptically, linearly or circularly polarized

The polarized light by the sample passes through the polarization filter

This polarization filter polarizes all the

differently polarized light to linearly polarized light

The analyser integrated with the detector collects

the image

Sends it to the processor

Pictorial representation of polarization by an optically active object

Transparent/semi transparent foreign parts undistinguishable from the cotton tufts.

Transparent foils appear coloured under Polarized light aimed by filters.

Basic variant SP-FP

CCD Camera for Colour

module

Nozzle bar

CCD Camera for P-Module

Nozzle bar

Illumination unit for

Polarized light

U-Module

The word “U-Module” stands for Ultra Violet light(UV).This module uses ultraviolet light to identify the contaminants.

Type of contaminants detected are:-

1. Particles contaminated with fluorescent parts from bleached cotton, PP or PES in the cotton.

Principle of U-Module

Those particles contaminate with fluorescent parts behave in a very peculiar way when UV light is passed through them.

When illuminated By UV light, they itself turn themselves as the light source. They absorb the UV light and re-emit it almost instantaneously. Some energy gets lost in the process, so the emitted light has a longer wavelength than the absorbed radiation, which makes this light visible and causes the material to appear to 'glow‘ and in our case appears “blue”.

White or no transparency parts not detected by camera.

These parts appear “bluish” under UV light illumination.

U-Module

F-Module

P-ModuleTrutzschler

SP-FPU

Construction of FPSThe important parts in the construction

are1. Cameras for the colour module2. Camera for the P-Module and U-

Module.3. Illumination units for the U-module and

P-module.4. Deflection mirror.5. Speed Sensors.6. Polarization Filters.7. Nozzle Bar.8. Bucket wheel lock.9. Fan for disposal.10.Large volume collection bag for

collection of foreign parts.

In the next slide, the cross section of the machine is shown wherein all the parts described above are highlighted..

Working• We will first look in the zoomed

portion of the detection area:-

As seen in the diagram, the foreign particle appears coloured under Polarized light.

The nozzle bars throws the particles and it is taken out by suction.

Working video

Machine Controls...

Easy maintenance

References

1. Patent:- “Apparatus on Spinning preparation for

detecting foreign objects of plastic material.”Patent number:- US 7,440,106 B2.Date:- October 21, 2008.Assignee:- Trutzschler GmbH & Co., KG.,

Monchengladbach.

2. Trutzschler SP-FPU BROUCHERS 2014.

Prepared by:-

1. Disha Jadav 2. Pranesh Shetty.

3. Kaushik Rakholiya.4. Jainik Sonani.5. Hardik Pujara.

BE-III Textile Technology.Faculty of technology & engineering.The Maharaja Sayajirao University of

Vadodara.

REVIEWSyou can review the presentation on following:-

facebook.com/hardik.pujara.12

twitter.com/palmisthardik

Acknowledgements

• We the team, would like to express our gratitude to the following esteemed person for giving us a chance to showcase the presentation

Dr. Hireni K. Mankudi.Assistant Professor,Department of textile engineering,Faculty of technology & engineering,The Maharaja Sayajirao University of Baroda.

Thank You