The present invention relates to a revolver-type winding machine (rotational winding shaft-bearing turret structure) intended for plastic, laminated, aluminum, paper and self-adhesive materials, prepared to operate at speeds in the order of 200 to 600 mpm (meters per minute) and with web widths comprised between 520 and 2200 mm.
The winding machine of this invention comprises two parallel winding shafts with independent direct-drive motors, where the reel progressively moves linearly during its formation towards the center of a vertical support plate for supporting the assembly of winding shafts and servomotors, and after formation of the reel, and with the reel located in the center of said plate, the plate rotates and transfers an empty winding shaft to a material receiving position, and the empty reel is subsequently removed by means of another linear movement of the formed reel with respect to said disc-shaped plate.
Said motors for the direct drive of the winding shafts can by synchronous, i.e., servomotors, or asynchronous (alternating current) and equipped in said latter case with a winding for direct drive, although such motors will generally be described hereinafter as servomotors.
The machine has associated cutting means that allow sub-dividing the formed reel into several units of the same or different widths.
The proposed machine has a general structure and corresponds to an operating principle (independent linear movement of the two motor-winding shaft assemblies in relation to a vertical disc-shaped plate that rotates about a horizontal axis and bearing said assemblies) which is generally described in patents EP 243 748 (see
The winding machine described in this latter patent U.S. Pat. No. 5,429,320 has all the features described in the preamble of claim 1.
With respect to this winding machine, the invention proposes alternative support means, offering a releasable hold of the free ends of the winding shafts, which are retained at all times, during the formation of the reel in said shafts until the reel is unloaded.
The invention also proposes a different structure of the rotary drive means for the disc-shaped plate entailing increased robustness of the machine and furthermore improving the conditions for supplying and distributing electric power and fluid to the different drive means of the machine, entailing simplification and greater reliability of said supply.
The invention further proposes means for the selective interlocking of the disc-shaped plate bearing the winding shafts during the movement of the reel being formed towards the central part of the plate, which assures movement of the reel being formed towards the center of the bearing disc-shaped plate in a horizontal plane.
The revolver-type winding machine for web material of this invention has a known structure (e.g. according to patent EP 243 748 or patent U.S. Pat. No. 5,429,320) and for that purpose comprises:
In a machine having these features, the invention proposes that said support structures for supporting the free ends, opposite the rotary drive ends of the winding shafts rest in carriages that can move linearly along parallel pairs of guides, these carriages bearing selectively releasable holding elements comprising pneumatically actuated clamp devices, such that at all times they keep the ends of the winding shafts held in a horizontal plane coplanar with said plane perpendicular to said disc-shaped plate during the formation of a reel, and while said reel advances towards a central position of the plate (movement controlled by a magnetic sensor located on the rotating shaft of a pressure rewinding element) in any one of said winding shafts.
The winding shafts are thus held at the end opposite their direct drive end by means of a double flange clamp arrangement during the movement of the reel being formed towards a central position of the disc-shaped plate and during a subsequent linear movement with respect to said plate progressing towards an unloading position away from the center until the reel is resting on a lifting table, which will remove the formed reel from the winding shaft, which is then arranged in cantilever fashion. Said clamp arrangement opens, releasing the end of the shaft before removing the reel and at the time of rotation of the disc-shaped plate and turret where it releases the end of the empty winding shaft.
According to another feature of the invention, said pairs of guides and carriages are located on the inner face of said second wall of the framing directly facing the ends of the winding shafts.
Another particularity of the invention is the possibility it offers of selectively immobilizing the disc-shaped plate during linear movements of the reel being formed (and its drive servomotor) towards the central part of the disc-shaped plate, whereby assuring that said movements are always made in a perfectly horizontal plane.
Means for supporting the weight of the formed reel in the center of the plate through said disc-shaped plate in the framing while the disc-shaped plate rotates, transferring an empty winding shaft to the loading position, whereby assuring that said movement does not generate over-efforts in means responsible for moving the drive servomotors of the winding shafts have also been provided.
These and other features of the invention will become clearer based on the following detailed description of an embodiment given by way of illustrative and non-limiting example with the aid of the attached drawings.
As can be seen in
According to the structure disclosed in aforementioned EP 243748, the disc-shaped plate 15 has associated guiding means 50, 51 (common to the two servomotors 13 and 14) and drive means 52, 53, 54, 55 (linear pneumatic actuator and guide in both cases) for moving said rotary drive servomotors 13, 14 and winding shafts 10, 11 linearly along the support plate 15 in a plane perpendicular to same, passing through its center, i.e., diametrical, such that the reel being formed progressively advances towards the center of said disc-shaped plate 15, and when the disc-shaped plate 15 rotates 180° to arrange the empty winding shaft in the loading position, the reel is supported in the center of the plate 15, avoiding any lifting effort.
As for the second end of each of said winding shafts 10, 11, according to the present invention there is provided a support structure for supporting the shafts 10, 11 during the linear movement thereof and during the formation of a reel on each of said shafts, said support structure being arranged associated with a second vertical wall 16b of the framing that is parallel to and opposite the vertical wall 16a of the framing. This support structure (one for each winding shaft) comprises a carriage 40, 41 that can move linearly by means of parallel pairs of guides 44, 45, each carriage 40, 41 bearing selectively releasable holding elements equipped with clamp devices 42, 43 such that at all times said clamps keep the ends of the winding shafts 10, 11 held in a horizontal plane coplanar with said plane perpendicular to said plate 15 during the formation of a reel on any one of said winding shafts 10, 11. Each of said clamps devices 42, 43 is provided with an autonomous drive actuator (pneumatic piston or cylinder) 46.
As previously indicated, the pairs of guides 44, 45 and carriages 40, 41 being located on the inner face of the wall 16b of the framing 16 directly facing the ends of the winding shafts 10, 11 is also characteristic of the proposal of this invention. Such arrangement of the support-holding means for supporting-holding the ends of the shafts assures the parallelism of the winding shafts 10, 11 and the correct holding thereof at all times during the operating cycle of the winding machine. Said holding is compatible with the rotation of the shaft, for which purpose the clamp means have been provided with rolling coupling means for the coupling with the end of each shaft 10, 11. Furthermore the fact that each of the winding shafts 10, 11 is always held at its two ends allows assuring perfect alignment of said shafts perpendicular to the disc-shaped plate 15.
As can be seen in
The carriages 40, 41 are driven by systems of linear actuators and guides 60, 61, 62, 63 located on the outer face of said vertical wall 16b.
Each of the carriages 40, 41 has (see
As can be seen in
When the disc-shaped plate rotates, the finished reel B on one of the winding shafts 10, 11 is arranged at the center of rotation of said disc-shaped plate 15 and turret or rotating assembly, held on the side opposite the drive by one of the clamp devices 42, 43. The other winding shaft 10, 11 is arranged at one end in its rewinding entry position and it rotates 180°, being arranged in cantilever fashion. Once said 180° rotation is made, the carriage with the open clamp devices 42, 43 moves to said empty shaft 10, 11, the clamp device 42, 43 closing to initiate winding and linear movement during the formation of the reel.
In the exemplified embodiment, said locking device 59 comprises a pneumatic actuator operating a pin that can be inserted in a cavity of the body of one of the carriages 56, 57.
The power supply and the pneumatic supply to the elements of the winding machine being described extends through the wall 16c of the framing 16 and the gear wheel 32 which has a central opening for such purpose, the struts 33 being useful as support elements for parts controlling and distributing power or compressed air (for example those installed in small cabinets).
The invention can be implemented using different devices which a person skilled in the art will consider as being equivalent for performing the exemplified functions.
Number | Date | Country | Kind |
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P201100614 | Jun 2011 | ES | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/ES2012/000143 | 5/24/2012 | WO | 00 | 12/17/2013 |