Patent Application
20130313354
This application is a continuation of International Application PCT/EP2012/051215 with an International Filing Date of Jan. 26, 2012 and claiming priority to co-pending German Patent Application No. DE 10 2011 000 590.0 entitled “Spulmaschine”, filed on Feb. 9, 2011.
The present invention generally relates to winding machines, wherein a continuously supplied or fed winding material, especially a yarn, a thread, a tape, a ribbon, a wire, a twine etc., is wound in an alternating fashion on two or multiple spindles to a wound package. Further, the invention relates to a method for operating a winding machine of this type.
In known winding machines, a winding material is continuously fed from a supply station. For example, the supply station is part of a production line continuously producing the winding material. At the winding machine, the winding material is wound onto a spindle (with or without the use of an intermediate sleeve) such that a wound package is formed. After completion of the winding, it is possible to remove the completely wound package from the winding machine, to transport the wound package and to use the material of the wound package in subsequent processing. The spindle might be driven for effecting the winding motion. Alternatively, the rotational movement of the wound package might be effected by a frictional drive, in particular by a driving roller that is radially pressed at an outer surface of the wound package. During the winding process, the winding material is moved in lateral direction and parallel to the spindle by a traversing device. The traversing device is located in a feeding path of the winding material in a close distance in front of or upstream from the wound package. The rotational and traversing motion are controlled by a control unit such that during the winding process a three dimensional wound package with increasing diameter is formed.
In known winding machines, two or multiple wound packages might be provided, wherein the spindles are transferred in an alternating fashion into a working position wherein the packages are wound. For the winding process of the wound packages, a common traversing device might be provided for both spindles. When in the working position a predetermined amount of the winding material has been wound on the spindle, the spindle is transferred from the working position into a resting position. The continuously fed winding material is then supplied to the other spindle presently set in the working position or to a sleeve supported by the other spindle, respectively. The transfer of the winding material to the other spindle might be performed automatically or might be controlled by an operator. In the resting position, it is possible to manually or automatically remove the completely wound package from the spindle. For transferring the spindles from the working position into the resting position, the spindles are usually rotatably supported by a rotary plate or a turret, wherein the rotational axis of the spindles and of the turret have a parallel orientation. The positions of the spindles are alternately changed by rotation of the rotary plate.
German patent no. DE 102 23 484 B4 relates to the transfer process for the transfer of the winding material from the first to the second spindle. According to the German patent, in advance of the “real” winding process, a fixation winding, a transfer winding or a spare winding is wound outside the fanning width. If the traversing device comprises a reversing screw shaft, it is not possible to move the traversing guide of the traversing device outside the fanning width without taking additional complex measures regarding the design of the groove of the traverse cam. According to the German patent, the traversing device is shifted by a shifting device parallel to the longitudinal and rotational axis of the spindles such that it is possible to feed the winding material to the spindle or sleeve outside the fanning width. The shifting device is a pneumatically actuated piston/cylinder unit which is at any time actuated pneumatically via a valve and an associated control unit. Prior to the removal of the completely wound package from the winding machine, the completely wound package is positioned in the resting position and the empty spindle is positioned in the working position. If (at least in some cases) the completely wound package is not removed from the winding machine before the winding of the other wound package in the working position has been completed, the distance of the spindles has to be larger than the diameter of the completely wound packages in order to ensure that the outer surfaces of the completely wound package in the resting position and the wound package in the working position do not contact or collide. If the distance of the spindles is choosen to be smaller than the diameter of the completely wound packages, the completely wound package in the resting position necessarily has to be removed from the spindle before the winding of the wound package in the working position is completed. Otherwise, the wound packages would collide which might require a shutdown of the complete winding machine. Therefore, with regard to the distance of the two spindles, there is a conflict of objectives since
This conflict of objectives gets worse with increasing velocity of the winding process due to the effect that the increase of the velocity of the winding process reduces the time available for a removal of the completely the wound package.
GB 1 159 282 A relates to a winding machine for winding continuously fed winding material in an alternating fashion on two spindles. The spindles are arranged end to end and with a parallel orientation of their longitudinal axes. Each spindle is supported by a swingable arm. It is possible to rotate the arm about an axis having an orientation parallel to the longitudinal axes of the spindles. For winding a wound package, the swingable arm is actuated such that the spindle or the wound package, respectively, is in frictional engagement with a driving roller. When the winding of a wound package is completed, the swingable arm is swung such that the wound package is lifted from the driving roller and transferred into a removal position for removing the completely wound package. After removal of the completely wound package, the swingable arm is swung back for winding another wound package on the spindle.
In the winding machine known from U.S. Pat. No. 3,921,922 A, continuously fed winding material is wound in an alternating fashion on two wound packages being arranged on respective spindles. The spindles are attached to opposite ends of a rotatable arm with their longitudinal axes having a parallel orientation. For a transfer operation, the rotatable arm is rotated about its rotational axis such that a completely wound package on one of the spindles is lifted from the friction drive drum driving the wound package during the winding operation and transferred into a removal position. Concurrently, by the rotation of the rotatable arm an empty tube on the other spindle comes into contact with the friction drive drum such that the winding process on the empty tube starts. In the removal position, the completely wound package is removed from its spindle by a gripping element.
In the winding machines known DE 195 05 838 A1 and WO 2008/095982 A1, two wound packages arranged on respective spindles are wound in an alternating fashion. The spindles are arranged on a rotatable spindle carrier. By rotation of the spindle carrier the spindles can be alternately transferred into an operating position and into a resting position. In the resting position, the completely wound package is shifted off the spindle onto a doffer device. The completely wound package remains on the doffer device until it is manually or automatically removed.
The present invention relates to a winding machine comprising two spindles for two wound packages arranged thereon. The winding machine further comprises a shifting device. By the shifting device it is possible to shift a completely wound package along its rotational axis into a removal position. In the removal position, the two wound packages are arranged on the spindles without any overlap of their axial extensions. As the wound packages are arranged without any overlap of their axial extensions in the removal position of the completely wound package, the time interval available for removing the completely wound package from its spindle (which is predetermined and depends on a feeding velocity of the winding material) does no longer depend on the distance of the two spindles.
The fact that according to the invention “the two wound packages have no overlap of their axial extensions in the removal position of the completely wound package” does not exclude any overlap of their sleeves. Instead, portions of the sleeves projecting beyond the wound packages might have at least some overlap as long as the wound packages themselves do not have any overlap of their axial extensions. In other words, according to the invention the completely wound package on one spindle and the package being wound on the other spindle axially “bypass” each other such that they are prevented from colliding.
Further, the shifting of the completely wound package by the shifting device might be advantageous with regard to the removal of the completely wound package, since a longer time interval is provided for the removal. Besides, one might take advantage of the fact that the completely wound package is shifted by the shifting device from a main working plane of the winding machine associated with the winding into another plane of the winding machine. In this other plane, the completely wound package might be easier to access, e.g., by an operator or an automatic removing device. Further, the risk of injuries might be decreased. It is also possible that the completely wound package already passes a part of a travel path for the removal towards means for storage or transport of the wound package.
According to one embodiment of the invention, in a winding position of a spindle, a winding material is caught by a spindle or sleeve and/or wound on a spindle or a sleeve supported by the spindle, respectively. This might be realized as known from the prior art. For example, the working position, i.e. the position of the wound package during the winding process, might change during the build-up of the wound package in response to its increasing diameter.
For another embodiment, concurrently with a catching by and/or winding on the spindle located in the working position, a completely wound package located on the other spindle being located in the removal position is removed from the winding machine. The removal might be performed manually by an operator, or (at least a part of) the removal might be automated.
The spindles and/or the wound packages arranged on the spindles, respectively, might be transferred into the working position and the resting position in an alternating fashion. It is also possible that they are temporarily located in other positions, e.g. a holding position or an intermediate position.
By the shifting device it is possible to shift a completely wound package along its rotational axis such that the completely wound package is transferred from a winding position into the removal position. The corresponding shifting path of the shifting device might be larger than the extension of the wound package along its rotational axis and thus, larger than the fanning width of the wound package.
There are various possibilities with regard to the design of the shifting device and with regard to the provision of the necessary shifting path of the completely wound package:
According to an embodiment of the invention, the shifting device is an axial actuator controlled by a control unit. For this embodiment the shifting path of the wound package for effecting the removal position is defined by an actuation path of the axial actuator. The actuator might be a pneumatically actuated piston/cylinder unit with associated valves and an associated electric control unit like generally known from DE 102 23 484 B4 (despite the fact that here it is used in another context). However, the invention is not limited to this particular embodiment—instead, there are also many other options for the design of the shifting device.
For another embodiment of the invention the spindles are moved relatively to a frame fixed to a housing of the winding machine. The spindles move in a plane having an orientation perpendicular to the rotational axes of the spindles or the wound packages from the working position into the resting position (and vice versa). This movement might be provided by a rotation of the rotary plate or the turret (in the following “turret”). For shifting a completely wound package into its removal position, the shifting device shifts the completely wound package along a given shifting path having an orientation parallel to the rotational axis of the wound packages or spindles. The aforementioned two kinds of motions or paths might be controlled separately from each other with regard to the timing. They also might be controlled such that one motion is followed by the other one, wherein the motion of the shifting might be performed before or after the rotation of the turret. If both motions overlap at least partially, a saving of time is achieved even in case of low motion velocities and accelerations.
According to another embodiment of the invention, the shifting device is actuated in dependence on a rotational motion of the turret. For example, the shifting device might be controlled in response to a timing signal by an angle position sensor sensing the rotation of the turret. It is also possible that a switch is provided for the control of the shifting device. The switch is actuated in response to the rotation of the turret. Further, a control signal for rotating the turret might also be used for controlling the shifting device. Alternative to the use of an additional actuator, the motion control of the shifting device by the rotational motion of the turret might be realized by direct coupling of these motions. This might be achieved by a mechanical coupling. For example, a common driving unit might be provided for the turret and the shifting device, wherein the driving power is bifurcated or is divided to the turret and the shifting device, respectively. In another exemplary embodiment, a cam is provided for converting the rotational motion of the turret to the shifting motion. Here, the shifting device with its mechanic coupling is built by the cam.
Regarding those embodiments of the invention wherein the shifting device shifts the completely wound package relative to its axially fixed spindle, the completely wound package might be shifted over a shifting path with a length such that in the removal position the corresponding spindle only partially extends through the completely wound package. The distance of the spindle extending through the completely wound package in the removal position defines the path which has to be passed for removing the wound package from the spindle. This path for removing the completely wound package is reduced in case that in the removal position the spindle only partially extends through the completely wound package. Thus, the effort regarding the removal of the completely wound package might be reduced.
In one embodiment of the invention, the shifting device might be used in a multifunctional manner:
Additional to the transfer of the wound package from the winding position into the removal position, the shifting device might also be used for shifting the wound package into an operating position. Here, in the operating position the winding material extends along a path wherein the winding material interacts with a cutting device and/or a catching device. This operating position might be different from a winding position, a holding position and/or a removal position. For example, for cutting the winding material, the shifting device might push the winding material at a location upstream from the outer surface of the completely wound package against a cutting device, e.g. a cutter. If a catching device is provided, the winding material might be caught in the region of the spindle where a new winding process is initiated.
The shifting device might also shift the wound package into an operating position. In the operating position a fixation winding and/or a transfer winding or a spare winding is wound. This is known for example from DE 102 23 484 B4, wherein according to DE 102 23 484 B4 the traversing device has to be moved for the build-up of a fixation winding, a transfer winding or a spare winding. According to the invention, a similar effect can be achieved by the use of the shifting device, since the winding material is transferred with the shifting of the completely wound package into an axial region of that spindle or sleeve upon which a new package is to be wound. In the aforementioned axial region, it is possible to wind the fixation winding, transfer winding or spare winding.
For a more detailed description regarding the fixation winding, spare winding or transfer winding and the corresponding control measures, it is referred to DE 102 23 484 B4.
Other features and advantages of the present invention will become apparent to one with skill in the art upon examination of the following drawings and the detailed description. It is intended that all such additional features and advantages be included herein within the scope of the present invention, as defined by the claims.
The invention can be better understood with reference to the following drawings. The components in the drawings are not necessarily to scale, emphasis instead being placed upon clearly illustrating the principles of the present invention. In the drawings, like reference numerals designate corresponding parts throughout the several views.
On the spindle 5, there is a partially wound package 8 (preferably with a sleeve 9). The wound package 8 has a diameter d increasing to D during the winding process. The winding material 10 is fed to the wound package 8 by a traversing device 11. Like known from prior art, the distance between the traversing 11 and the longitudinal and rotational axis of the spindle 5 might vary during the build-up of the package with increasing diameter d. For this purpose the traversing device 11 or the spindle 5 might be provided with an appropriate degree of freedom in the projection plane of
In
The front view of a winding machine according to the invention might look like the front view shown in
The shifting device 23 shown in
According to the embodiment shown in
A comparison of
Preferably, the distance 36 of the rotational axis 18, 19, i.e. the longitudinal axes of the spindles 4, 5, which is shown in
In step 29, the complete winding of the wound package 6 is performed on the spindle 4 located in the working position 13. With regard to the spindle 4, the wound package 6 is in a winding position 22.
In a subsequent step 30, the turret 2 is rotated by an angle of 180 degrees, and the spindle 4 is transferred into a resting position 12 as shown in
Finally, in step 31 the winding material 10 is cut.
In a subsequent step 32, the winding material 10 is wound onto the wound package 8 located in the working position, wherein the wound package 8 is located in the winding position 22 with regard to the spindle 5. The wound package 6 on the spindle 4 might be slowed down concurrently with the winding of the wound package 8.
Steps 29 to 32 are equal to the steps during a changing or transfer process in a winding machine 1 known from the prior art.
According to the invention, an additional step 33 is performed. In step 33, the wound package 6 in the resting position 12 is shifted by the shifting device 23 from the winding position 22 into the removal position 24. In the removal position 24 the axial extensions 14, 15 have no overlap 20. Step 33 might include step 34, wherein in step 34, the shifting device 23 is automatically actuated under the control of a control unit of the winding machine 1. In step 35, the wound package 6 is removed from the spindle 4. Here, it is also possible that the wound package 6 has already been partially removed during step 35 with the actuation of the shifting device 23 by movement along the aforementioned length 28. In
For each spindle 4, 5 a respective shifting device 23 might be provided. These two shifting devices 23 might be supported by the turret 2, and they might be rotated together with the turret 2. A simplification in construction might be achieved by using a single shifting device 23 for both spindles 4, 5. For example, the shifting device 23 provided for both spindles 4, 5 might be supported by a supporting structure 3 at a position to which the spindles 4, 5 are moved by rotation of the turret 2 for removal of the wound packages.
In case that the shifting device is built with a pneumatically actuated cylinder, the cylinder might be a double acting cylinder for enabling a pneumatic return or reset of the shifting device 23.
The wound packages or sleeves might be fixed on the spindles in a friction locked manner by radially expanding springs surrounding the spindles. The radial expansion of the springs effects that the springs are pressed at the inside at the sleeves so that both a rotary as well as an axial fixation is effected. The springs might be located in V-shaped grooves of the spindles, wherein the V-shaped outline of the grooves builds a wedge like bevel. By spiral springs these springs are pushed along the bevels to the outside, so that the radial expansion is effected. The fixation is pneumatically released by an actor counteracting the force of the spiral springs. Here, the actor might be located immediately below the shifting device 23.
Preferably, the ratio of the diameter D to the distance 36 is about 0.7 to 0.9 and even more preferred about 0.75 to 0.85. For example, the ratio might be 0.80. In terms of the volume that might be wound and thus in terms of the duration before a collision might occur, this ratio means that a collision would occur at about 1/5 of the total package build-up in case that the completely wound package is not removed.
For a non-limiting example the ratio of the distance of the front surface of the spindle 4 from the front surface 16 of the wound package 6 and the axial extension 14 of the completely wound package 6 might be about 0.7 to 0.8, e.g. 0.73. The ratio of the length 28 and the axial extension 14 of the completely wound package 6 might be about 0.6 to 0.7, in particular 0.66. However, other ratios are also possible within the scope of the invention.
Preferably, the shifting device 23 is actuated not until the completely wound package 6 has been completely slowed down by an appropriate braking device. However, it is also possible that the shifting device 23 is actuated at a pint in time wherein the completely wound package 6 is still rotating. In the latter case, it might be advantageously if the shifting device 23 is integrated in the spindle (i.e. if the rotating spindle or a part thereof is axially moved).
Many variations and modifications may be made to the preferred embodiments of the invention without departing substantially from the spirit and principles of the invention. All such modifications and variations are intended to be included herein within the scope of the present invention, as defined by the following claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2011 000 590.0 | Feb 2011 | DE | national |
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/US2012/051215 | Jan 2012 | US |
| Child | 13957787 | US |
