Foreign part separator-FPS

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.

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
CCD
Camera
Nozzle
Bar Opening
Roller
Material
Cross section of machine

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

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

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 through
3. A detector device to collect the light received from material.

Unpolarized light
Polarizing filter polarizes
the light and produces
polarized light
Polarized light passes
through the material
The polarized light by the
sample passes through
the polarization filter
It get elliptically, linearly
or circularly polarized
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

White or no transparency parts not detected by camera.
These parts appear “bluish” under UV light illumination.

F-Module
P-Module
U-Module
Trutzschler
SP-FPU

Construction of FPS
The important parts in the construction are
1. Cameras for the colour module
2. 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

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.

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.

REVIEWS
you 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.

Foreign part separator-FPS

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