System for winding an end of a yarn
The system addresses the issue of twist loss during spool change by winding the wire from the central axis, maintaining twist integrity and facilitating easy unwinding.
Patent Information
- Authority / Receiving Office
- EP · EP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2021-11-29
- Publication Date
- 2026-03-25
AI Technical Summary
The loss of twist in the free end of a wire during spool change results in damaged sections at the center of the spool, making it difficult to access and unwind the wire efficiently.
A system for winding the wire from the central axis of a coil, utilizing a support mechanism, displacement mechanism, gripping interface, and cutting mechanism to maintain twist integrity, ensuring the free end is cut and wound without alteration.
The system ensures the free end of the wire is wound without losing twist, facilitating easy unwinding and reducing the need for manual intervention to remove damaged sections.
Smart Images

Figure IMGF0001 
Figure IMGF0002 
Figure IMGF0003
Abstract
Description
[0001] The present invention relates to the field of winding systems for the free end of a wire on a reel and more particularly to the field of starting systems for winding the free end of a wire.
[0002] Yarn processing operations, particularly heat treatment, are performed by machine along the length of a yarn as it moves through the machine. Typically, the machine is configured to process several yarns simultaneously, bundled together in a strand. Upon exiting the machine, the individual yarns processed within the strand are distributed onto their respective spools or reels for storage. When the yarn is stored on a spool, it is wound around a nearly straight axis, with the yarn distributed along its entire length, resulting in a roughly cylindrical storage shape.
[0003] When a coil reaches its maximum volume, the wire being wound around it is cut so that the winding operation can continue around a new straight axis, allowing a second coil to be created. The transfer of the winding operation from one coil to another thus involves cutting the continuous wire being wound, followed by securing the free end of the unwound wire to a new straight axial structure so that the winding operation can continue.
[0004] However, when the wire being wound has been treated to induce a twisting deformation, cutting the wire during the spool change operation results in the loss of this twist along a length of the free end of the wire. This loss of twist occurs on both sides of the cut area. If the loss of twist disappears along a length of the free end of the wire already wound on the first spool, this portion of wire can be easily removed when using the spool of wire by unwinding a length of wire from this first spool that corresponds to the altered length, ensuring that the wire used from the spool is perfectly straight. Conversely, the loss of twist along a length of the free end of the wire that has not yet been wound leads to the wire being wound from a free end that corresponds to a portion with an altered twist.The wire wound onto the second spool then incorporates a damaged section at its end, located on the spool's central axis. However, the specific positioning of this damaged section at the center of the spool prevents easy access for a user to remove it before the rest of the wire is unwound. The user handling the wire from the spool is therefore forced to monitor the end of the unwinding process to intervene and remove the damaged end section.
[0005] A winding system according to the preamble of claim 1 is disclosed in EP 0 286 893 A1.
[0006] The present invention aims to overcome these drawbacks by proposing a system for supplying a spool of wire in which the portion of the wire at the end located on the central axis of the spool is not altered by a release of its twist, particularly likely to occur during a cutting of the wound wire during a spool change.
[0007] The invention thus relates to a system for winding one end of a wire from a central axis of a coil, a system comprising: a support means for the central axis of the spool, the support means being associated with a mechanism for driving axial rotation of the central axis of the spool, a mechanism for moving a portion of the wire to be wound positioned downstream of the free end of the wire, a gripping interface for catching a portion of the wire to be wound, this gripping interface being positioned at the end of the central axis of the spool and fixed in rotation with the central axis of the spool associated with the support means to drive the winding of the wire around the central axis, a wire cutting mechanism upstream of the portion of the wire interacting with the gripping interface, characterized in that the displacement mechanism includes an interface suitable for gripping the wire.
[0008] The invention also relates to a method for implementing a winding system according to the invention, characterized in that the method comprises: a step of gripping a portion of the wire to be wound located downstream of the free end of the wire by the displacement mechanism, a step of cutting, by the cutting mechanism, a portion of the wire including the free end of the wire and positioned upstream of the portion, held by the displacement mechanism, a step of hooking, by the hooking interface, a portion of wire positioned downstream of the portion pinched by the displacement mechanism, a step of releasing the wire by the displacement mechanism, a step of driving the wire into winding around the central axis of the reel, a step of evacuating the portion of the cut wire.
[0009] The invention will be better understood from the following description, which relates to a preferred embodiment, given by way of non-limiting example, and explained with reference to the accompanying schematic drawings, in which: [ Fig. 1 ] represents a schematic illustration of an example of the construction of a winding system according to the invention at the beginning of operation, before any work is carried out on the wire to be wound, [ Fig. 2 ] represents a schematic illustration of an example of the construction of a winding system according to the invention after displacement of the wire to be wound, [ Fig. 3 ] represents a schematic illustration of an example of the construction of a winding system according to the invention immediately after the wire to be wound is attached and cut, [ Fig. 4 ] represents a schematic illustration of an example of the construction of a winding system according to the invention after the wire to be wound has been attached and cut, and before the wire interacts with a wire guide, [ Fig. 5 ] represents a schematic illustration of an example of the construction of a winding system according to the invention once the interaction of the wire to be wound with a wire guide is underway.
[0010] The invention relates to a system for winding one end of a wire 1 onto a central axis 2 of a coil, characterized in that the system comprises: a support means 3 of the central axis 2 of the spool, the support means 3 being associated with a mechanism for driving axial rotation of the central axis 2 of the spool, a mechanism for moving a portion 15 of the wire 1 to be wound positioned downstream of the free end 11 of the wire 1, a hooking interface 6 for catching a portion 12 of the wire 1 to be wound, this hooking interface 6 being positioned at the end of the central axis 2 of the spool and fixed in rotation with the central axis 2 of the spool associated with the support means 3 to drive the winding of the wire 1 around the central axis 2, a cutting mechanism 4 of the wire 1 upstream of the portion 12 of the wire 1 interacting with the hooking interface 6.
[0011] The winding system of the invention is configured to allow the winding of the wire 1 to begin on a central axis 2 of the coil so that the end of the wire 1 which is fixed for rotational drive by the central axis 2 of the coil corresponds to a portion 15 of the wire 1 to be wound positioned downstream of the free end 11 of the wire 1. This portion 15 of the wire 1 to be wound then corresponds to a portion of wire 1 sufficiently distant from the free end 11 of the wire 1 so as not to suffer an alteration related to the free end 11 of the wire 1, such as a degradation of its twist. The winding system of the invention is thus arranged to coordinate the different elements and means which constitute it so that when the portion 15 of the wire 1 to be wound away from the free end 11 of the wire 1 is fixed to the central axis 2 of the coil, the free end 11 of the wire 1 is jointly removed by cutting.The conjunction in time, on the one hand, of the operation of fixing a portion 15 of the wire 1 and, on the other hand, of the detachment operation makes it possible to achieve the fixing of an end of wire 1 on the central axis 2 of the coil which corresponds to a portion 15 of the wire 1 without alteration supported by the free end 11 of the wire 1 before its winding.
[0012] In the winding system of the invention, the retrieval of the portion 15 of the wire 1 to be wound, from which the attachment to the central axis 2 of the reel is performed, involves the displacement mechanism 5. This wire 1 displacement mechanism 5 can be implemented in the form of various means adapted, on the one hand, to grip or retrieve the wire 1 at a portion 15 of its length located away from the free end 11 of the wire 1 and, on the other hand, to guide the wire 1 to the attachment interface 6 positioned at the end of the central axis 2. Thus, the wire 1 displacement mechanism 5 includes, in particular, an interface designed to interact with a portion 15 of the wire 1 to be wound in order to grip it. By way of example, this gripping can be achieved by pinching the wire 1 between two articulated parts acting as jaws.
[0013] The hooking interface 6, mounted at the end of the central axis 2, is arranged to be fixed against rotation with the central axis 2. Thus, once the wire 1 is caught by the hooking interface 6, it is driven in rotation with the central axis 2, which, via its support 3 in the system, is itself pivoted by a drive mechanism. The rotation of the hooking interface 6 at the end of the central axis 2 produces a continuous and repeated movement of the hooking element to catch the portion 15 of the wire 1 that is brought forward. As an example of construction, the hooking interface 6 is made in the form of a disc whose peripheral edge includes one or more hooks adapted to catch a wire 1 brought forward within their range of movement.
[0014] The cutting mechanism 4 for wire 1 includes at least one cutting blade preferably arranged for movement perpendicular to the axis of wire 1 at the cutting point. This cutting mechanism 4 is ideally configured to sever wire 1 along its length, near the point where wire 1 is caught by the hooking interface 6. For example, the cutting mechanism 4 includes a single cutting blade that cooperates with a counter-blade with which the cutting blade is articulated. Alternatively, the cutting mechanism 4 includes at least one pair of cutting blades that articulate with each other to sever wire 1.
[0015] According to a first system construction variant, the cutting mechanism 4 is structurally independent of the movement mechanism 5. Although its operation is linked to the wire movement mechanism 5 and the hooking interface 6, this cutting mechanism 4 is integrated into the system autonomously from the wire movement mechanism 5, without sharing any part of its structure or operating mechanism. According to a second system construction variant, the cutting mechanism 4 is structurally linked to the wire movement mechanism 5, such that the wire 1 gripping or retrieval operation is preferably configured to position the wire 1 at the cutting mechanism 4, between two cutting blades or between the cutting blade and its counter-blade, so that the wire 1 can be cut at a specific point along its length.
[0016] According to an example relating to a variant of the invention, the wire 1 displacement mechanism 5 comprises a movable arm 7. Such a movable arm 7 includes at least one interface for interacting with a portion 15 of the wire 1 to be wound in order to grip it. Such an interface is preferably positioned at one end of the movable arm 7, the other end of the movable arm 7 being mounted on a frame-forming structure. According to one construction feature, the movable arm 7 includes at least one joint for optimizing the mobility of the arm 7 and, in particular, the spatial mobility of its wire 1 gripping interface. According to another construction feature that can be combined with the feature detailed above, the movable arm 7 is configured to be movable along at least one axis of translation.As an example, the movable arm 7 is mounted to slide on a straight axis, this sliding axis being itself fixed to the frame structure. According to another example, which can also be combined with the one detailed above, the movable arm 7 includes a telescopic arrangement that may involve a piston actuation mechanism.
[0017] According to an example relating to another embodiment of the invention that can be combined with the previously detailed embodiment, the system comprises a movable arm 7 that carries at least the cutting mechanism 4. This movable arm 7 is designed to have substantially identical characteristics to those of a movable arm 7 previously detailed within the framework of the displacement mechanism 5 that carries the wire 1 gripping interface. According to this embodiment, the cutting mechanism 4 can be moved to be brought closer to the wire 1 and, more specifically, to the point along the length of the wire 1 at which the cutting is to be performed. According to an example corresponding to a specific feature of this embodiment, the cutting mechanism 4 is mounted at the end of a separate movable arm 7 whose movement is configured to be coordinated with the wire 1 displacement mechanism 5.According to this specification, the cutting mechanism 4 and the wire 1 displacement mechanism 5 are structurally independent in their respective movements. According to an example corresponding to another specification of this construction variant, which provides an alternative to the previous specification, the cutting mechanism 4 is mounted at the end of a movable arm 7 common to the movable arm 7 that carries and positions the interface of the wire 1 displacement mechanism 5, intended to interact with a portion 15 of the wire 1. According to this specification, the interaction of the displacement mechanism 5 with the wire 1 via the dedicated interface jointly positions the wire 1 within the cutting mechanism 4. Therefore, when the wire 1 displacement mechanism 5 positions the portion 15 of the wire 1 near the gripping interface 6 to be caught, the cutting mechanism 4 is ready to perform a sectioning of the free end 11 of the wire 1 to be wound.
[0018] According to an example relating to another embodiment of the invention that can be combined with the previously detailed embodiments, the system includes a tensioning mechanism 8 for the free end 11 of the wire 1 to be wound. This tensioning mechanism 8 is configured to interact with the free end 11 of the wire 1, so that the portion 15 of the wire 1 intended to be wound is easily grasped and manipulated by the wire 1 displacement mechanism 5 and can be cut by the cutting mechanism 4. This tensioning of the free end 11 of the wire 1 also allows control of the position of at least one length of the wire 1, which includes at least the portion 15 of the wire 1 to be wound, positioned downstream of the free end 11 of the wire 1.This position control thus makes it possible to impose a substantially axial orientation on the portion 15 of the wire 1 to be wound, so that the wire 1 displacement mechanism 5 can interact easily with the wire 1 to grip it. The axial orientation of the portion 15 of the wire 1 is then determined by, on the one hand, the point at which the wire 1 enters the system or the point of contact of the wire 1 with an element of the system and, on the other hand, the point of interaction of the wire 1 with the tensioning mechanism 8. It should be noted that, when the winding system of the invention is positioned downstream of a continuous supply of wire 1, for example at the output of a wire 1 processing device, the tensioning mechanism 8 is configured to operate a displacement of the wire 1 whose speed is at least equal to or greater than the speed at which the wire 1 moves when it enters the system.Furthermore, the tensioning mechanism 8 is capable of evacuating the portion of the wire 1 cut by the cutting mechanism 4.
[0019] According to an example relating to a specific variant of the previously detailed construction variant, the tensioning mechanism 8 incorporates a suction nozzle. This suction nozzle is configured to interact with the free end 11 of the wire 1 entering the system, so as to draw in a length of wire 1 associated with the free end 11. The use of a suction nozzle as the tensioning mechanism 8 allows, by drawing in a continuous airflow, the tensioning of the wire 1 without friction exerted against the surface of the wire 1 that could degrade the wire 1. Also, from a constant suction flow, the suction nozzle of the tensioning mechanism 8 makes it possible to generate tension on the wire 1 independently of any variations in the continuous inflow speed of the wire 1 into the system.According to a specific variant of this example, the suction nozzle is mounted at the end of an articulated arm or along a translational axis so that it can be moved to allow adjustment of the axial orientation of the portion 15 of the wire 1 within the system, in particular to facilitate the gripping of the wire 1 by the displacement mechanism 5. According to an example relating to another alternative specific variant, the tensioning mechanism 8 involves a pair of counter-rotating rollers. The free end 11 of the wire 1 is then arranged to be positioned between the two rotating rollers.
[0020] According to an example relating to another specific variant that can be combined with certain previously detailed construction variants, the system is preferably configured so that the path of wire 1 within the system, from the entry point to the point of interaction with the tensioning mechanism 8, runs along a portion of the cylindrical surface of the central axis 2 of the coil in a plane substantially perpendicular to the axis of the coil. It should be noted that the axis of the portion 15 of wire 1 is oriented from the last point of contact of wire 1 with the surface of the central axis 2 of the coil towards the point of interaction of wire 1 with the tensioning mechanism 8. Preferably, the path of wire 1 follows a direction similar to the direction of rotation of the central axis 2 of the coil.This specific movement of the wire 1 within the system, particularly around a portion of the central axis 2 of the spool, allows the wire 1 to be positioned around at least a portion of the central axis 2 of the spool prior to its attachment to the attachment interface 6. Also, prior to the attachment of the wire 1 to the attachment interface 6, the wire 1 rubs against the surface of the central axis 2 of the spool. Once attached to the attachment interface 6, the wire 1 is rotated by the attachment interface 6 to wind itself around the central axis 2 of the spool.
[0021] According to an example relating to another specific variant that can be combined with certain previously detailed construction variants, the tensioning mechanism 8 is configured to position the axis of the tensioned wire 1 near the end of the central spool axis 2, which includes a gripping interface 6. This particular positioning of the wire 1 by the tensioning mechanism 8 makes it possible to reduce the length of the stroke imposed by the displacement mechanism 5 on the portion 15 of wire 1 so that the wire 1 interacts with the gripping interface 6. This particular positioning of the wire 1 can be achieved by a movable tensioning mechanism 8, for example mounted at the end of an articulated arm or along a translation axis, so that it can be moved and thus the position of the wire 1 within the system can be adjusted, particularly with respect to the stroke of the gripping interface of the displacement mechanism 5.According to one construction example, the tensioning mechanism 8 of the wire 1 is configured to be mobile along a stroke comprising at least one axial component substantially parallel to the central axis 2 of the coil.
[0022] According to an example relating to another embodiment of the invention that can be combined with the previously detailed embodiments, the system also includes a wire guide 10 mounted to move along an axis parallel to the central axis 2 of the spool for managing the distribution of the wire 1 wound along the central axis 2 of the spool. This wire guide 10, also called a "fly," is configured, on the one hand, to catch the wire 1 wound around the central axis 2 of the spool and, on the other hand, arranged to perform repeated movement along the length of the central axis 2 of the spool. The wire guide 10 is mounted to move within the system to catch the wound wire 1 at a portion of its length positioned between, on the one hand, a wire 1 inlet and, on the other hand, the first point of contact of the wire 1 against the surface of the central axis 2 of the spool.As an example, the thread guide 10 has a flared, or even triangular, groove shape. One narrow end is open towards the central axis 2 of the spool, and the other, wider end is open towards the entry point of the thread 1. The axis of the groove is positioned substantially perpendicular to the central axis 2 of the spool and / or to the axis of translation of the thread guide 10. Each of the two lateral edges of the groove is curved into a lip that sits above most of one half of the groove, leaving a gap in the central part of the groove to allow the insertion of a thread 1 to be guided. During the operation of the thread guide 10, the thread 1, positioned along the path of the thread guide 10, slides against the surface of one of the lips to be inserted into the groove through the gap in the central part.The translation of the wire guide 10 along the length of the spool's central axis 2 orients the wire winding against the surface of the spool's central axis 2 via the restricted opening of the groove. Simultaneously, successive and repeated translations of the wire guide 10 in opposite directions along its axis of movement successively and alternately position the wire 1 in the groove against each of the groove's edges, between the bottom of the groove and one of the lips that partially covers the groove. The movement of the wire 1 by the wire guide 10 guides the winding of the wire 1 around the spool's central axis 2 and distributes the wire 1 along the length of this central axis 2.
[0023] According to an example relating to a specific variant of the previously detailed construction variant, the system includes a gapping mechanism 9 for the wire 1 relative to the wire guide 10. This gapping mechanism 9 is configured to modify the stroke of the wire 1 upstream of its winding around the central axis 2 of the spool between two positions. A first position corresponds to positioning the stroke of the wire 1 so that it is separated from the axial stroke of the wire guide 10 in translation, thus avoiding any interaction with the wire guide 10 and preventing it from being caught. A second position corresponds to positioning the stroke of the wire 1 at the same level as the axial stroke of the wire guide 10 in translation, so that the wire 1 is caught by the wire guide 10.
[0024] According to an example relating to a specific variant of the wire 1 spacing mechanism 9, this mechanism comprises at least one axial portion arranged along an axis substantially parallel to the central axis 2 of the spool mounted on the support 3. As an example, the spacing mechanism 9 is implemented as a structure comprising a substantially straight edge arranged along an axis substantially parallel to the axis of travel of the wire guide 10 in translation and mounted to move along a path substantially perpendicular to the axis of travel of the wire guide 10. Also as an example, the spacing mechanism 9 is implemented by an axial part, one edge of whose surface, arranged along the length of the part, has a continuous surface against which the moving wire 1 can rub without risk of damage. This axial part is carried at the end of a rotating, movable arm.Also, the tilting mechanism 9 moves the wire 1 upstream of its winding around the central axis 2 of the spool to move the wire 1 away from the axis of the wire guide 10's travel in translation or to position it on the axis of this travel.
[0025] According to an example relating to a specific variant of the wire 1 spacing mechanism 9, this mechanism includes a guiding means 91 for the winding wire 1 near the hook interface 6. This guiding means 91 is arranged to orient, or even maintain, the path of the wire 1 near the hook interface 6, upstream of its winding around the central axis 2 of the spool. By way of example, the guiding means 91 is made in the form of a groove or notch positioned on the straight edge of the surface of the workpiece against which the wire 1 is moved. This notch or groove is oriented along an axis substantially perpendicular to the axis of the spacing mechanism 9 and directed towards the central axis 2 of the spool around which the moving wire 1 is intended to wind.
[0026] According to an example corresponding to another construction variant of the attachment system of the invention, and capable of being combined with the variants detailed previously, the support means 3 for the central axis 2 of the reel is mounted on a frame-forming structure that is shared with the attachment interface 6 and the rotational drive mechanism, and possibly also with the wire guide 10 and its translation mechanism. However, the reel support means 3 can be mounted on a structure independent of the other constituent elements of the system of the invention. The spacing mechanism 9 can thus be supported by its own frame-forming structure, or possibly shared with the wire guide 10 and its translation mechanism.Similarly, the wire 1 displacement mechanism 5 and the cutting mechanism 4 can be mounted on respective or shared frame structures, possibly via a respective or shared movable arm 7. This construction variant allows the various elements comprising the winding system of the invention to be assembled at a central spool axis 2 already positioned on an existing support means 3. The system of the invention can thus be assembled several times successively at different spool axes 2 supported by respective support means 3.
[0027] The invention also relates to a method for implementing a winding system according to the invention, characterized in that the method comprises: a step of grasping a portion 15 of the wire 1 to be wound located downstream of the free end 11 of the wire 1 by the displacement mechanism 5, a step of hooking, by the hooking interface 6, a portion 12 of wire 1 positioned downstream of the portion 15 moved by the displacement mechanism 5, a step of cutting, by the cutting mechanism 4, a portion of the wire 1 including the free end 11 of the wire 1 and positioned upstream of the portion 15 held by the displacement mechanism 5, a step of releasing the wire 1 by the displacement mechanism 5, a step of driving the wire 1 into winding around the central axis 2 of the reel, a step of evacuating the portion of the wire 1 cut.
[0028] It should be noted that, according to the specific features of the movement mechanism 5 of the system of the invention, the wire 1 gripping step may involve pinching the portion 15 of the wire 1. It should also be noted that the wire 1 hooking and cutting steps are performed in close succession, if not simultaneously. To optimize the coordination of these two steps, the system of the invention may incorporate a mechanism for automating the operation of the cutting mechanism 4 with the movement mechanism 5 when the portion 15 of the wire 1 to be wound is gripped by the hooking interface 6.The system of the invention is also capable of integrating a mechanism for detecting the tension exerted on the portion 15 of the wound wire 1 to identify the hooking of the wire 1 by the hooking interface 6 and to allow the cutting of the wire 1 by the cutting mechanism 4 and / or the release of the wire 1 by the displacement mechanism 5.
[0029] According to a first embodiment, the method includes, prior to the step of gripping a portion 15 of the wire 1, a step of tensioning the free end 11 of the wire 1. This step of tensioning the wire 1 allows for easy control of the position of the wire 1 within the system in the context of the implementation of the method of the invention.
[0030] According to another embodiment which can be combined with the previously detailed embodiment, the method includes, prior to the step of attaching a portion 12 of the wire 1, a step of axially rotating the central axis 2 of the spool mounted on the support 3. The axial rotation of the central axis 2 of the spool allows the movement of the attachment interface 6 to be carried out jointly, so that a portion 12 of the length of the wire 1 can be caught by the attachment interface 6, provided that the latter is positioned across the stroke of the attachment interface 6 by the movement mechanism.
[0031] Of course, the invention is not limited to the embodiments described and shown in the accompanying drawings. Modifications remain possible, without departing from the scope of protection of the invention, which is defined in the claims.
Claims
1. System for winding an end of a yarn (1) of a central bobbin shaft (2), the system comprising: - a support means (3) for the central bobbin shaft (2), the support means (3) being associated with a mechanism for driving the central bobbin shaft (2) in axial rotation, - a mechanism (5) for moving a portion (15) of the yarn (1) to be wound that is positioned downstream of the free end (11) of the yarn (1), - a hooking interface (6) to catch a portion (12) of the yarn (1) to be wound, this hooking interface (6) being positioned at the end of the central bobbin shaft (2) and fixed in rotation with the central bobbin shaft (2) associated with the support means (3) to drive the winding of the yarn (1) around the central shaft (2), - a mechanism (4) for cutting the yarn (1) upstream of the portion (12) of the yarn (1) interacting with the hooking interface (6), characterized in that the movement mechanism (5) comprises an interface that is able to grip the yarn (1).
2. Winding system according to Claim 1, characterized in that the movement mechanism (5) comprises a mobile arm (7).
3. Winding system according to either of the preceding claims, characterized in that the system comprises a mobile arm (7) that bears at least the cutting mechanism (4).
4. Winding system according to one of the preceding claims, characterized in that the system comprises a mechanism (8) for tensioning the free end (11) of the yarn (1) to be wound.
5. Winding system according to Claim 4, characterized in that the tensioning mechanism (8) involves a suction nozzle.
6. Winding system according to either of Claims 4 and 5, characterized in that the tensioning mechanism (8) is configured to position the axis of the tensioned yarn (1) near the end of the central bobbin shaft (2) that comprises a hooking interface (6).
7. Winding system according to one of the preceding claims, characterized in that the system also comprises a yarn guide (10) mounted so as to be able to move in translation along an axis parallel to the central bobbin shaft (2) for the management of the distribution of the yarn (1) in winding along the central bobbin shaft (2).
8. Winding system according to Claim 7, characterized in that the system comprises a mechanism (9) for moving the yarn (1) away from the yarn guide (10).
9. Winding system according to Claim 8, characterized in that the mechanism (9) for moving the yarn (1) away comprises at least one axial portion disposed along an axis substantially parallel to the central bobbin shaft (2) mounted on the support (3).
10. Winding system according to either of Claims 8 and 9, characterized in that the mechanism (9) for moving the yarn (1) away comprises a means (91) for guiding the yarn (1) in winding near the hooking interface (6).
11. Method for implementing a winding system according to one of Claims 1 to 10, characterized in that the method comprises: - a step of gripping of a portion (15) of the yarn (1) to be wound that is situated downstream of the free end (11) of the yarn (1) by the movement mechanism (5), - a step of hooking, by the hooking interface (6), of a portion (12) of yarn (1) positioned downstream of the portion (15) moved by the movement mechanism (5), - a step of sectioning, by the cutting mechanism (4), of a portion of the yarn (1) comprising the free end (11) of the yarn (1) and positioned upstream of the portion (15) held by the movement mechanism (5), - a step of releasing of the yarn (1) by the movement mechanism (5), - a step of driving of the yarn in winding around the central bobbin shaft (2), - a step of evacuation of the sectioned portion of the yarn (1).
12. Method according to Claim 11, characterized in that the method comprises, prior to the step of gripping a portion (15) of the yarn (1), a step of tensioning the free end (11) of the yarn (1).
13. Method according to either of Claims 11 and 12, characterized in that the method comprises, prior to the step of hooking a portion (12) of the yarn (1), a step of axially rotating the central bobbin shaft (2) mounted on the support.
Citation Information
Patent Citations
Method to secure a yarn, delivered at a constant speed, to a bobbin
EP0286893A1
Takeup machine with threadup device
US6027063A