SCLAFORST A/C- 238
Energy
unit contains :
1. Suction generator with motor drive
2. Intake
muffler
3.Yarn waste
chamber
4. Electrical
control panel with switches
5. Compressed
air control unit
6. Control
unit for electronic clearers
7. Rectifier
unit
8. Mic unit
system
9. PCB unit
10.control
transformers
11.Take up
the back portion of this compartment
12.Package
conveyor .
SUCTION
GENERATOR :
It reaches the air sub
pressure required for picking up the yarn ends prior to splicing them together
.The suction generator attempts to draw air from suction
beam.
Which provides 3 orifices per winding unit .
1 Suction tube for suction arm , yarn trap and suction pipe.
2 Suction tube for yarn clam on creel .
3 Package doffer , the drawn air passes through the waste chamber .
YARN
WASTE CHAMBER
The air
drawn from the suction beam passes through yarn waste chamber with filter
screen in to spiral housing of s.generator. The screen collects yarn ends,
lint, fly, trash and dust .
DE-CONTAMINATION
SYSTEM
1 TRAVELLING
BLOWER
2 MULTI - JET
3 DUST REMOVAL DEVICE
MULTI -
JET :-
The multi-jet is a multiple air
jet device designed to keep elements susceptible to lint accumulate clean and
functional.IT CLEANS THE FOLLOWING
1 Tension assembly with yarn
shears and precleanes .
2 Cut and clamp device .
3 Waxing device
OPERATIONAL pressure of multi jet is 3.5 bar the auto coner
requires compressed air for the following functions .
1 Opening and splicing of
yarn ends .
2 Multi jet and winding unit
.
3 Evacuation of dust removal
devices .
4 Bobbin preparation devices
of auto spin career type D .
compressed air supply pipes :-
Pipe 1 Opening of yarn ends
pipe 2 Splicing “
pipe 3 Multi jet and winding
unit
pipe 4 Bobbin preparation
device .
COMPRESSED AIR
CONTROLLING :-
Management valve { 10 } - Opening of yarn ends
“ { 11 } - Splicing
“ { 12 } - Multi jet
“ { 13 } - Bobbin changing
“ { 14 } - Package brake and lift
“ { 15 } - Bobbin tray blow off
“ { 16 } - Bobbin tray shifter
“ { 17 } - Loop gate
WINDING UNIT
FUNCTIONS :-
1
Winding
2
Bobbin change
3
Joining of ends
During
unwinding position the bobbin secured no
peg. The yarn passes through the center of the unwinding accelerator to bottom
eyelet. During unwinding of a bobbin from top to bottom this winding tension
increases and is highest during the unwinding of the last bottom layers.The
unwinding tension also deviator depending upon ballooning changes when unwinding from small to casgediame and vice
versa.
The unwinding accelerator influences built up of ballooning it
decreases and equalizes the unwinding tension simultaneously, it prevents
slough off of individual or multiple yarn layers from the bobbin and also
facilitate higher winding speeds with out subjecting the yarn to higher tension
. Its influence upon tension also serves to obtain delivery package even
density . It pivoted 180 degrees .
DEFLECTOR
PLATES : Top plates guide the yarn
towards the center of the drum into the guide grove .Bottom plate guide the
yarn end towards the drum center after yarn break or bobbin run out .
THE
WINDING UNITS COMPUTER CONTROLS THE DRUM MOTOR AND PERFORMING THE FOLLOWING :
1. BRAKING AND STOP PROCESS -
When yarn breaks coil cut by clearer
coil bobbin exhausted the w n compute registers the disappearance of the
dynamic yarn signal , then the drive motor switched off.
2.REVERSAL DRIVE -
For yarn joining upper suction arm must detect and inhale the upper
end from the delivery package. For this purpose the motor restarts in reversal
direction slowly driving the drum and package .
3.SLOW START UP -
After yarn joining the drum motor starts and accelerates drum and
package uniformity with out slippage until it pick ups the high speed The slow
start up prevents immediate acceleration of the yarn guide drum and slippage
under the slower accelerating delivery package.
4.WINDING -
Selection and indication of winding speed for the drum is
controlled by M I C system . The speed is Adjusted between 550 to 1500 m/min. .
5.
RIBBON BREAKER FEATURE TYPE - 1 -
During winding, with increasing
package dia the rational speed of d. package Decreases,thus changing rotational
ratio bet drum and package. The ratio represents a direct numerical relation
the yarn forms strings and ribbons in the yarn body of the package .Such
ribbons leads to problems in dyeing and more breakages in further process and
individual cops. The ribbon breaker generates a periodic slippage of minute
proportion between drum and package. This causes displacement of the yarn guide
groove in relation to the circumference of the delivery package . Thus
preventing build up of ribbons .
package cradle setting adjustable 0 - 11 degrees
package brake - 3.5 bar .
CRADLE
PRESSURE COMPENSATION PERFORMS TWO TASKS :
1 It facilitates setting of
pressure between delivery package and yarn guide drum . This pressure
determines package density which also controlled by yarn tension .
2 It compensates for
increasing cradle pressure caused by accumulating additional package weight
during package raise. This keeping cradle pressure uniformity through out the
package. scale in the setting level
s - soft package
m - medium hard package
h - hard package
TRAVERSE
DISPLACEMENT SYSTEM
The
yarn is placed in a cross wound fashion on the delivery package , the crossing
angle is a product of traverse and groove pitch of the yarn guide drum . On the
reversing points of the yarn traverse i.e. on the package edges the yarn forms
bow shaped lines . This results higher density of the yarn body on the package
flanks. This system acts as an equalizer feature between density of the package.
Hanks and remaining yarn on the package the drum yarn on the package. The drum
shifts laterally back and front
approximately 2 mm under the stationary package this offsetting the bow
shaped yarn reversing joints to each other the entire cycle takes place up 40 times/min. .
RIBBON
BREAKER TYPE - 2 -
For certain applications of cylindrical delivery packages the
functional proportions of R-b type-1 is not sufficient. R-b type-2 prevents
precise roll-off between drum circumference and package circumference in the
diametric zones most susceptible to the formation of ribbons. For this purpose
the winding units control intermittently and inshort frequency changes the
speed of the yarn guide drum simultaneously an electromagnetic brake is applied
to the LH adopter this creating sufficient slippage between drum and package to
safety prevent any formation of ribbons. The m/c system registers with the unit
computer at which package dias ribbons areto be expected . The computer uses
this information to activate ribbon brake type-2 in such fashion that its
function begins 3mm before the critical package dia is reached and stops mm
after this dia has been surpassed. Simultaneously neutralizing R.B.T.1 .
PRE-CLEANER
:-
Its
function is to prevent yarn loops from ribbon from entering the yarn tensioner
and to strip coarseimpurities of the yarn. The yarn travels through a slot
formed bet guide plate and pivoting catch hook. Min. slot width is 0.5 to 0.7
mm with a scale setting wheel with setting rod it is adjustable of 0.3 mm to
2.6 mm .
TENSIONER :-
It
applies uniform winding tension to the yarn, in order to remove thin places and
to obtain desired density of the d.package the desired tension is generated by
friction of the bet the tension discs. It is adjusted by increasing or
decreasing the pressure of tensioner spring .
WAXING
ATTACHMENT :-
It is
designed to evenly apply a multiple of minute wax particles on the yarn s
surface. Waxed yarn is desired for subsequent process where low friction values
are mandatory mortally for circular and broad knitting . A motor with gear
arrangement drives the waxed shaft with square shaft on which the wax roll
rotates. The rotation of direction of wax rolls opposite to the running
direction of the yarn .
FUNCTIONING
PRINCIPLES -
The
yarn is measured without any surface contact in a measuring condenser, fed with
ratio frequency. The yarn passes through the measuring field and produces an
electrical signal in the later. The signal is proportional to the change in
mass per unit length of the yarn. The signal is amplified and fed to the
evaluating channels of the yarn clearing installation. i.e ......
- Thick place channel
- Spinners doubles channel
- Thin places channel , provided that the thin
places adopter is fitted.
Each of
these channels reacts to the signal for the corresponding type of yarn fault.
As soon as the actuating limit of a channel is reached , the cutting device of
the yarn clearer cut the yarn .
- The
setting knob sensitivity is used to set the actuating limit for the fault cross
section determined.
- The
setting reference length is equivalent to the length over which the
fault
cross section is determined.
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