TECHNICAL FIELD
[0001] The present invention relates to a method and a device for removing unnecessary yarn
of a winding package, before or when doffing of the winding package is carried out.
BACKGROUND ART
[0002] On an auto-winder or the like, when a winding package becomes full, the yarn joining
the supply yarn package to the winding package is forcibly cut. However, as it is
necessary for the doffing device to pick up the yarn that is joined to the supply
yarn package when doffing is carried out, the yarn end of the supply yarn package
and the yarn end of the full winding package are joined and doffing is carried out
after the joint has been wound onto the last wound part of the full winding package,
as disclosed in US 4 703 900A.
PROBLEMS TO BE SOLVED BY THE INVENTION
[0003] As described above, a joint exists on the last wound part of the full winding package
wound on a conventional winder. Consequently, at the next process such as a warping
frame, a problem may occur whereby a number of joints existing in the last wound part
of the winding package may overlap.
[0004] Further, on the aforementioned conventional auto-winder, waste winding of a single
winding package from a single supply yarn package is carried out but in this situation,
if the wound-off supply yarn package and next supply yarn package are different types
of yarn, problems whereby yarn of a different type wound on the next supply yarn package
is wound into the last winding part of the full package may occur.
[0005] Yet further, the supply yarn package is sometimes wound after dyeing but this kind
of the supply yarn package may have innermost layer parts with dyeing specks where
the dye is darker or lighter than other parts and the layer parts with these kinds
of dyeing specks are also erroneously wound.
[0006] Yet further still when a supply yarn package is formed, the innermost layer parts
of that supply yarn package are damaged between the winding tube of that supply yarn
package and the winding drum of the winder. Accordingly, it is not desirable for these
damaged innermost layers to be wound onto the winding package.
SUMMARY OF THE INVENTION
[0007] It is an object of the present invention to propose an unnecessary yarn removal method
and a device for a winding package for solving the above mentioned problems.
[0008] These problems are accomplished by the features of claim 1 and 2, respectively. A
first aspect of the unnecessary yarn removal method for a winding package is the removal
of a predetermined amount of yarn of the last wound part of the winding package before
or when doffing of the winding package is carried out. A second aspect Is the removal
of a predetermined amount of yarn of the innermost layer part of the supply yarn package
which had been wound onto the last wound part of the winding package. A third aspect
is the removal of the outer layer part of the next supply yarn package wound onto
the last wound part of the winding package in continuance with the innermost layer
part of the previous supply yarn package.
[0009] In a further aspect of the device, the doffing device is arranged to run along a
plurality of winding units, a dust box for storing the removed yarn of the last wound
part is arranged on that doffing device and a removal means for removing the yarn
stored in the dust box is arranged on one side of the machine comprising the plurality
of winding units.
[0010] As yarn of different types and joints existing in the last wound part of the full
winding package as well as yarn of the innermost layer of the supply yarn package
can be removed, problems such as trouble at the next process such as a warping operation
and the appearance of dyeing specks in a cloth can be prevented.
[0011] Furthermore, when the package is full, the running speed of the yarn decreases as
the package is stopped and in association with this, the yarn monitor may make erroneous
detections thus stopping monitoring of a yarn by the yarn monitor. Due to this, yarn
defects may exist in the last wound part but the present invention is able to remove
these defects.
[0012] As the yarn waste stored in the doffing device can be automatically removed in association
with the running of the doffing device, handling of the doffing device becomes easy.
BRIEF DESCRIPTION OF THE DRAWINGS
[0013]
Figure 1 is a front view of a winding unit illustrating successive operating steps
thereof;
Figure 2 is a perspective view of a winding unit of an autowinder showing the unnecessary
yarn removal operating steps according to the invention;
Figure 3 is a perspeptive view showing additional operating steps of the method of
Figure 2;
Figure 4 is a front view of an auto-winder and a doffing device;
Figure 5 is a partially enlarged perspective view of the dust box of the doffing device
of Figure 4; and
Figure 6 is a perspective view of a winding unit of an auto-winder showing the rewinding
actions of the supply yarn package after dyeing.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0014] As shown in Figure 1(A), the yarn wound off from a supply yarn package (1) on each
winding unit (W) is wound onto a winding package (4) which contacts a traverse drum
(3) and is driven by that drum (3). A winding tube (5) of the winding package (4)
is supported by a known cradle arm (not shown, so that it may freely rotate. The supply
yarn package (1) of the drawing is a spinning bobbin formed by a ring spinning machine.
In the drawing, (M) is a yarn monitor that monitors whether the yarn (2) is running
or not and detects yarn defects. (S) is a yarn piecing device such as a splicer that
joins the yarn end of the supply yarn package (1) and the yarn end of the winding
package (4). (SN) is a supply yarn suction guide means that grips the yarn end of
the supply yarn package (1) and guides it to the yarn piecing device (S). Furthermore,
(SP) is a winding yarn suction guide means that grips the yarn end of the winding
package (4) and guides it to the yarn piecing device (S).
[0015] When the winding package (4) becomes full (a predetermined amount has been wound),
a cutter (6) arranged above the supply yarn package (1) operates via a suitable control
device based on a signal from a known full winding detector (not shown). As shown
in Figure 1(B), the yarn (2) is cut between the supply yarn package (1) and the winding
package (4) and the cut yarn end (2a) of the supply yarn package (1) is sucked by
the suction pipe (7).
[0016] The doffing device D in Figure must pick up the supply yarn package (1) side yarn
end (2a) when doffing operations are to be carried out but as it is difficult for
the doffing device (D) to pick up the supply yarn package (1) yarn end (2a) sucked
into the suction pipe (7) positioned below, as shown in Figure 1(B), the supply yarn
package (1) side yarn end (2a) and a yarn end (2b) wound off from the full winding
package (4) are joined by a piecing device (S). In order to carry this out, the suction
opening of the winding yarn suction guide means (SP) is brought close to the winding
package (4) as shown in Figure 1(B), the yarn end of the winding package (4) is sucked
and gripped and by returning to its original position as shown in Figure 1(C), the
yarn end of the winding package (4) is guided to the yarn piecing device (S). Furthermore,
the suction opening of the supply yarn suction guide means (SN) is brought close to
the suction pipe (7) as shown in Figure 1(B), the yarn end of the supply yarn package
(1) is sucked and gripped from the suction pipe (7) and by returning to its original
position as shown in Figure 1(C), the yarn end of the supply yarn package (1) is guided
to the yarn piecing device (S).
[0017] Next, after the yarn ends are joined, driving of the traverse drum (3) is restarted
and the winding package (4) rotates. The yarn (2) is run and the running of the yarn
(2) is confirmed by the yarn monitor (M). Afterwards, the drum (3) stops. Due to this,
as shown in Figure 1(D), the joint (2c) is attached to the last wound part of the
full winding package.
[0018] Figure 6 shows the case where a supply yarn package (1A) formed by the traversing
of a yarn on the winding tube (1Aa) by an auto-winder, for example, wound off. In
this example, a case is shown where a single winding package (4) is formed from a
single supply yarn package (1A). In the drawing, a cheese shaped supply yarn package
(1A) is shown but, of course, cone shaped is possible.
[0019] Figure 6(A) shows the state where the winding package (4) has become full and the
supply yarn package (1A) has become empty. When the winding package (4) becomes full,
a signal is sent from the full package detector similar to the case of Figure 1. Thus,
the empty package (1A) is ejected from the winding unit (W) and as shown in Figure
6(B), a new fully wound supply yarn package (1A) is supplied to the winding unit (W).
In continuance, the suction opening of the winding yarn suction guide means (SP) approaches
the winding package (4) and the yarn end of the winding package (4) is held. Furthermore,
the suction opening of the supply yarn suction guide means (SN) is positioned above
the supply yarn package (1A) and moreover, due to the blowing of the yarn end inserted
in the winding tube (1Aa) of the supply yarn package (1A) by the yarn end blowing
means (BL), the yarn end of the supply yarn package (1A) is held by the supply yarn
suction guide means (SN). Afterwards, similar to the case in Figure 1, the yarn end
of the supply yarn package (1A) and the yarn end of the winding package (4) are joined
(Figure 6(C)) and the running of yarn (2) is confirmed. As a result, the joint (2c)
is wound onto the last wound part of the winding package (Figure 6(D)).
[0020] In the case of Figure 1 or Figure 6, a doffing signal is emitted after the aforementioned
piecing operation has finished, that doffing signal is input to a suitable control
device, the doffing device (D) that runs along a plurality of winding units (W) linked
together runs to infront of the winding unit (W) that has emitted the doffing signal
and doffing is carried out by the doffing device (D). The doffing device (D) is provided
with a lever shaped yarn pick-up member (8), a lever shaped clamp cutter member (9)
and a yarn suction member (10).
[0021] Firstly, as shown in Figure 2(A), the tip of the yarn pick-up member (8) contacts
from behind the part of the yarn (2) positioned below the traverse drum (3) from the
joint (2c) wound on the last part of the full winding package to the supply yarn package
(1,1A) and the traverse drum (3) operates. As a result of this, a notch (8a) formed
on the tip of the yarn pick-up member (8) traps the yarn (2).
[0022] Next, as shown in Figure 2(B), the yarn pick-up member (8) is rotated forwards and
the yarn (2) is pulled upwards while being caught in the notch (8a) of the yarn pick-up
member (8). Simultaneous with the operation of this yarn pick-up member (8), or rather
immediately after or before, the clamp cutter member (9) is operated and the clamp
cutter (9a) arranged on the tip of the clamp cutter member (9) is moved to an operating
position near to the yarn (2) which has been picked up by the yarn pick-up member
(8). Also, the suction opening (10b) of the suction pipe (10a) of the yarn suction
member (10) is arranged so that it is positioned between the clamp cutter (9a) moved
to the aforementioned operating position and the winding package (4).
[0023] Next, the clamp cutter (9a) of the clamp cutter member (9) is operated and cuts the
yarn (2) picked up by the yarn pick-up member (8) while gripping the yarn end (2e)
of the yarn supply package (1, 1A) side produced after cutting. The cut yarn end (2d)
of the winding package (4) side is sucked into the suction pipe (10a) from the suction
opening (10b). Simultaneous with this suction operation or immediately after or before,
the yarn pick-up member (8) returns to the stand-by position as shown in Figure 2(A)
and the coupling of the yarn pick-up member (8) and the yarn end (2d) is released.
Also, the traverse drum (3) reverse rotates and the full package (4) reverse rotates
(rotation in the unwinding direction) until the joint (2c) wound into the last wound
part of the full package (4) is sucked up by the dust box (10c) of the yarn suction
member (10). This reverse rotation time of the full package (4) may be controlled
by the reverse rotation count of the traverse drum (3) or the reverse rotation time
of the traverse drum (3) as the position of the joint (2c) wound onto the last wound
part of the full package (4) is approximately uniform. Further, a joint detection
sensor may be arranged on the entrance (10c') or the like of the dust box (10c) and
the rotation of the traverse drum (3) may be stopped when that joint detection sensor
detects the joint (2c).
[0024] An arrangement is possible whereby instead of the cut yarn end (2d) of the winding
package (4) being sucked by the suction opening (10b) of the suction pipe (10a) after
the yarn (2) has been cut by the clamp cutter (9a) of the clamp cutter member (9)
as described above, the clamp cutter (9a) is operated and the yarn (2) is cut after
the uncut yam (2) has been sucked by the suction opening (10b) of the suction pipe
(10a).
[0025] After the joint (2c) wound onto the last wound part of the full package (4) is sucked
into the dust box (10c) of the yarn suction member (10), a cutter (not shown) positioned
at the entrance (10c') of the dust box (10c) is operated and cuts the yarn (2) sucked
into the dust box (10c) while the suction operation of the suction pipe (10a) stops.
It should be noted that (10d) is a known air suction device arranged at some point
along the suction pipe (10a).
[0026] Next, if necessary, the traverse drum (3) is operated and due to the rotation of
the winding package (4) in the winding direction, the yarn (2) remaining in the suction
pipe (10a) is wound onto the full package (4) and afterwards the rotation of the traverse
drum (3) stops.
[0027] Afterwards, as is known, the cradle arm that supports the full package (4) opens
and doffing of the full package (4) is carried out. The full package (4) is ejected
from the winding position and as shown in Figure 3(A), a winding tube (5) is positioned
between the gripping plates (11a,11b) of the cradle arm. Simultaneous with this positioning
operation of the winding tube (5) between the gripping plates (11a,11b) of the cradle
arm or immediately after or before that positioning operation, the clamp cutter (9a)
of the clamp cutter member (9) that grips the yarn end (2e) of the yarn (2) at the
supply yarn package (1,1A) is moved to above the aforementioned winding tube (5) and
the yarn end (2e) by the clamp cutter (9a) is positioned between one edge (5a) of
the winding tube (5) and one gripping plate (11b) of the cradle arm. Next, as is publicly
known, the gripping plates (11a,11b) of the cradle arm are brought together and the
yarn end (2e) gripped by the clamp cutter (9a) is trapped by one edge (5a) of the
winding tube (5) and one gripping plate (11b) of the cradle arm.
[0028] Next, the cradle arm is rotated in the direction of the traverse drum (3) and the
winding tube (5) supported on the cradle arm is contacted with the traverse drum (3).
Winding of the yarn (2) restarts due to the rotation of the winding tube as shown
in Figure 3(B).
[0029] After the aforementioned doffing operations have been completed, the doffing device
(D) moves to the stand-by position or to the next winding unit (W) when a doffing
operation is required.
[0030] As a predetermined amount of yarn of the last wound part of the full package (4)
is removed before doffing or during doffing as described above, the joint wound onto
the full package (4) may be removed from the winding package (4) and a winding package
can be formed with no joint (2c) in a fixed position of the last wound part. Further,
removal of the joint (2c) part also means removal of part of the yarn of the next
supply yarn package (1A) in the case of Figure 6. Accordingly, there is no winding
of the yarn of the next supply yarn package (1A) on the winding package (4). Furthermore,
more yarn of the last wound part than the joint (2c) is removed. In the case shown
in Figure 6, if the yarn of the last wound part is removed so that the yarn of the
innermost layer part of the supply yarn package (1A) may be removed, the yarn of the
innermost layer part of the supply yarn package (1A) can be removed from the winding
package (4) and a winding package (4) without dyeing speck can be produced.
[0031] If only carried out with the aim of removing yarn of the innermost layers of the
supply yarn package (1A), when in the state as shown in Figure 6(B), a predetermined
amount of the yarn of the last wound part of the winding package (4), until the yarn
of the innermost layer of the supply yarn package (1A) is unwound, may be removed
by the winding yarn suction guide means (SP). In this case, the yarn wound on the
winding package (4) is unwound by reverse rotating the traverse drum (3) and the unwound
yarn is sucked by the suction guide means (SP). The sucked yarn is cut away from the
winding package (4) by a cutter arranged on the yarn piecing device (S) and removed.
[0032] If the doffing device (D) is modified so that the yarn end of the supply yarn package
(1,1A) may be directly gripped by the doffing device (D) close to the supply yarn
package (1,1A), it is no longer necessary to join the yarn from the supply yarn package
(1,1A) to the winding package (4) before doffing. Accordingly, if the yarn of the
last wound part of the winding package (4) is removed by the winding yarn suction
guide means (SP), it is no longer necessary to arrange a suction means such as the
suction member (10) or the like on the doffing device (D). In this case, it is preferable
not to allow yarn piecing after a joint has been formed.
[0033] On the aforementioned embodiment, an example where yarn (2) from the joint (2c) wound
on the last wound part of the full package to the supply yarn package (1,1A) is picked
up by a yarn pick-up member (8) has been described but, depending on the positioning
of the clamp cutter (9a) of the clamp cutter member (9) or the positioning of the
suction opening (10b) of the suction pipe (10a), the yarn (2) need not be picked up
by the yarn pick-up member (8) and the yarn end of the winding package (4) may be
directly sucked by the suction pipe (10a) or the yarn end of the supply yarn package
(1,1A) may be directly gripped by the clamp cutter (9a) of the clamp cutter member
(9). Thus, in this way, the yarn pick-up member (8) may be omitted.
[0034] Next, using Figures 4 and 5, the removal means for yarn waste stored in the dust
box (10c) will be described.
[0035] The doffing device (D) is arranged so that it runs in front of the winding units
(W) of the auto-winder along a rail (12) arranged on a ceiling or the like. Wheels
(d1) that contact with the rail (12) are arranged on the doffing device (D). (10c)
is the previously described dust box (10c) that stores yarn waste such as joints (2c)
wound on the last wound part of the full package (4) (13) is a side box incorporated
with a drive device and control device and the like arranged on one side of the auto-winder.
An air suction device (14) provided with a filter is positioned in the side box (13).
[0036] (15) is a connector plate positioned on one side of the auto-winder and a hole (15a)
is bored in the connector plate (15). The rear surface on which is positioned the
hole (15a) of the connector plate (15) and the air suction device (14) are connected
by a duct (16). (17) is a butterfly shutter of which the front elevation is V-shaped,
which is positioned on the front surface of the connector plate (15) and is arranged
so that it is able to swivel to the left and right about a shaft (18). The butterfly
shutter (17) normally slants to the left as shown in Figure 4 so that the right side
(17a) of the butterfly shutter (17) closes the hole (15a) bored in the connector plate
(15). A hole (19) is bored on the rear side of the dust box (10c) and a pipe (20)
is connected to that hole (19).
[0037] As shown in Figure 4, when the doffing device (D) suspended on the rail (12) runs
in the direction of the side box (13), the pipe (20) attached to the rear side of
the dust box (10c) enters the notch (17b) of the butterfly shutter (17) which has
closed the hole (15a) bored in the connector plate (15) and rotates the butterfly
shutter (17) in a clockwise direction about the shaft (18). Thus the hole (15a) in
the connector plate (15) opens, the hole (15a) and the pipe (20) of the dust box (10c)
are connected and the yarn waste stored in the dust box (10c) is removed to the air
suction device (14) via the duct (16) connected to the air suction device (14) normally
in the operating state.
[0038] After removal of yarn waste stored in the dust box (10c), when the doffing device
(D) suspended on the rail (12) runs in the direction opposite to the side box (13),
the pipe (20) of the dust box (10c) which is inserted in the notch (17b) of the butterfly
shutter (17) rotates the butterfly shutter (17) in a counter-clockwise direction about
shaft (18). Thus the right side (17a) of the butterfly shutter (17) closes the hole
(15a) in the connector plate (15) as shown in Figure 4.
1. Method for removing unnecessary yarn from a winding package (4), before or when doffing
of the winding package is carried out, the winding package being obtained by winding
yarn wound off from a supply yarn package (1, 1A) and the unnecessary yarn being either
a predetermined amount of yarn of the last wound part of the winding package or
a predetermined amount of yarn of the innermost layer part of the supply yarn package
which had been wound onto the last wound part of the winding package or
a predetermined amount of yarn of the outer layer part of a next supply yarn package
wound onto the last wound part of the winding package in continuance with the innermost
layer part of the previous supply yarn package which has become empty,
said method comprising the following steps:
- cutting the yarn between the supply yarn package and the winding package if the
unnecessary yarn is a predetermined amount of yarn of the last wound part of the winding
package or a predetermined amount of yarn of the outer layer part of a next supply
yarn package wound onto the last wound part of the winding package in continuance
with the innermost layer part of the previous supply yarn package which has become
empty,
- rotating the winding package in the unwinding direction,
- sucking the unnecessary yarn,
- cutting the unnecessary yarn sucked away from the winding package.
2. Device for removing unnecessary yarn from a winding package (4), before or when doffing
of the winding package is carried out, the winding package being obtained by winding
yarn wound off from a supply yarn package (1, 1A) and the unnecessary yarn being either:
a predetermined amount of yarn of the last wound part of the winding package or
a predetermined amount of yarn of the innermost layer part of the supply yarn package
which had been wound onto the last wound part of the winding package or
a predetermined amount of yarn of the outer layer part of a next supply yarn
package wound onto the last wound part of the winding package in continuance with
the innermost layer part of the previous supply yarn package which has become empty,
said device having a first means (9) for cutting the yarn between the supply yarn
package and the winding package, a means (10) for sucking the unnecessary yarn, a
means (3) for rotating the winding package in the unwinding direction and
a second means for cutting the unnecessary yarn sucked by the suction means away from
the winding package, where each of these means operates in connection with a device
for doffing the winding package.
3. Device as claimed in claim 2 wherein the doffing device (D) is arranged so as to run
along a plurality of winding units, a dust box (10c) for storing the removed yarn
of last wound part is arranged on that doffing device and a removal means (14) for
removing the yarn stored in the dust box is arranged on one side of the machine comprising
the plurality of winding units.
1. Verfahren zum Entfernen überschüssigen Fadens von einer Auflaufspule (4), bevor oder
wenn das Umsetzen der Auflaufspule durchgeführt wird, wobei die Auflaufspule durch
Aufspulen eines von einer Fadenlieferspule (1, 1A) abgewickelten Fadens erhalten wird
und der überschüssige Faden entweder
eine bestimmte Fadenmenge des zuletzt aufgespulten Teils der Auflaufspule oder eine
bestimmte Fadenmenge des Teils der innersten Schicht der Fadenlieferspule ist, der
auf den zuletzt aufgespulten Teil der Auflaufspule gespult wurde,
oder eine bestimmte Fadenmenge des Teils der äußeren Schicht einer nächsten Fadenlieferspule
ist, der auf den zuletzt aufgespulten Teil der Auflaufspule in Fortsetzung des Teils
der innersten Schicht der vorherigen Fadenlieferspule aufgespult wurde, die leer wurde,
wobei das Verfahren die folgenden Schritte umfasst:
- Schneiden des Fadens zwischen der Fadenlieferspule und der Auflaufspule, wenn der
überschüssige Faden eine bestimmte Fadenmenge des zuletzt aufgespulten Teils der Auflaufspule
oder eine bestimmte Fadenmenge des Teils der äußeren Schicht einer nächsten Fadenlieferspule
ist, der auf den zuletzt aufgespulten Teil der Auflaufspule in Fortsetzung des Teils
der innersten Schicht der vorherigen Fadenlieferspule, die leer wurde, aufgespult
wurde,
- Drehen der Auflaufspule in der Abspulrichtung,
- Ansaugen des überschüssigen Fadens,
- Schneiden des überschüssigen, von der Auflaufspule abgesaugten Fadens.
2. Vorrichtung zum Entfernen überschüssigen Fadens von einer Auflaufspule (4), bevor
oder wenn das Umsetzen der Auflaufspule durchgeführt wird, wobei die Auflaufspule
durch Aufspulen eines von einer Fadenlieferspule (1, 1A) abgespulten Fadens erhalten
wird und der überschüssige Faden entweder ist:
eine bestimmte Fadenmenge des zuletzt aufgespulten Teils der Auflaufspule oder eine
bestimmte Fadenmenge des Teils der innersten Schicht der Fadenlieferspule, der auf
den zuletzt aufgespulten Teil der Auflaufspule gespult wurde, oder
eine bestimmte Fadenmenge des Teils der äußeren Schicht einer nächsten Fadenlieferspule,
der auf den zuletzt aufgespulten Teil der Auflaufspule in Fortsetzung des Teils der
innersten Schicht der vorherigen Fadenlieferspule, die leer wurde, aufgespult wurde,
wobei die Vorrichtung eine erste Einrichtung (9) zum Schneiden des Fadens zwischen
der Fadenlieferspule und der Auflaufspule, eine Einrichtung (10) zum Ansaugen des
überschüssigen Fadens, eine Einrichtung (3) zum Drehen der Auflaufspule in der Abspulrichtung
und eine zweite Einrichtung zum Schneiden des überschüssigen Fadens, der durch die
Saugeinrichtung von der Auflaufspule abgesaugt wurde, hat, wobei jede dieser Einrichtungen
in Verbindung mit einer Vorrichtung zum Umsetzen der Auflaufspule arbeitet.
3. Vorrichtung nach Anspruch 2, bei der die Umsetzvorrichtung (D) so ausgebildet ist,
daß sie längs mehrere Spulstellen läuft, ein Staubbehälter (10c), der den entfernten
Faden des zuletzt aufgespulten Teils sammelt, an der Umsetzvorrichtung angeordnet
ist, und eine Beseitigungseinrichtung (14) zum Beseitigen des in dem Sammelbehälter
gesammelten Fadens auf einer Seite der die mehreren Spulstellen umfassenden Maschine
angeordnet ist.
1. Procédé pour retirer du fil superflu d'une bobine d'enroulement (4), avant ou lorsque
l'enlèvement de la bobine d'enroulement est effectué, la bobine d'enroulement étant
obtenue en enroulant le fil déroulé d'une bobine de fil d'amenée (1, 1A), et le fil
superflu étant soit
une quantité de fil prédéterminée de la partie enroulée en dernier de la bobine d'enroulement
ou
une quantité de fil prédéterminée de la partie de couche la plus interne de la bobine
de fil d'amenée qui a été enroulée sur la partie enroulée en dernier de la bobine
d'enroulement ou
une quantité de fil prédéterminée de la partie de couche externe d'une bobine de fil
d'amenée suivante enroulée sur la partie enroulée en dernier de la bobine d'enroulement
en continuité avec la partie de couche la plus interne de la bobine de fil d'amenée
précédente devenue vide,
ledit procédé comprenant les étapes suivantes :
- coupe du fil entre la bobine de fil d'amenée et la bobine d'enroulement si le fil
superflu est une quantité de fil prédéterminée de la partie enroulée en dernier de
la bobine d'enroulement ou bien une quantité de fil prédéterminée de la partie de
couche externe d'une bobine de fil d'amenée suivante enroulée sur la partie enroulée
en dernier de la bobine d'enroulement en continuité avec la partie de couche la plus
interne de la bobine de fil d'amenée précédente devenue vide,
- rotation de la bobine d'enroulement dans la direction de déroulement,
- aspiration du fil superflu
- coupe du fil superflu aspiré au loin de la bobine d'enroulement.
2. Dispositif pour retirer du fil superflu d'une bobine d'enroulement (4), avant ou lorsque
l'enlèvement de la bobine d'enroulement est effectué, la bobine d'enroulement étant
obtenue en enroulant du fil déroulé d'une bobine de fil d'amenée (1, 1A) et le fil
superflu étant soit :
une quantité de fil prédéterminée de la partie enroulée en dernier de la bobine d'enroulement
ou bien une quantité de fil prédéterminée de la partie de couche la plus interne de
la bobine de fil d'amenée qui a été enroulée sur la partie enroulée en dernier de
la bobine d'enroulement ou
une quantité de fil prédéterminée de la partie de couche externe d'une bobine de fil
d'amenée suivante enroulée sur la partie enroulée en dernier de la bobine d'enroulement
en continuité avec la partie de couche la plus interne de la bobine de fil d'amenée
précédente devenue vide,
ledit dispositif comportant un premier moyen (9) pour couper le fil entre la bobine
de fil d'amenée et la bobine d'enroulement, un moyen (10) pour aspirer le fil superflu,
un moyen (3) pour faire tourner la bobine d'enroulement dans la direction de déroulement
ainsi qu'un deuxième moyen pour couper le fil superflu aspiré par le moyen d'aspiration
au loin de la bobine d'enroulement, où chacun de ces moyens fonctionne en rapport
avec un dispositif prévu pour l'enlèvement de la bobine d'enroulement.
3. Dispositif selon la revendication 2, où le dispositif d'enlèvement (D) est agencé
de façon à se déplacer le long de plusieurs unités d'enroulement, une boîte à déchets
(10c) pour stocker le fil retiré de la partie enroulée en dernier est agencée sur
ce dispositif d'enlèvement, et un moyen de retrait (14) pour retirer le fil stocké
dans la boîte à déchets est agencée sur un côté de la machine comprenant plusieurs
unités d'enroulement.