EP2923980B1 - Vorrichtung und verfahren zur vorbereitung von dornen für umwickelmaschinen - Google Patents

Vorrichtung und verfahren zur vorbereitung von dornen für umwickelmaschinen Download PDF

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Publication number
EP2923980B1
EP2923980B1 EP15160658.9A EP15160658A EP2923980B1 EP 2923980 B1 EP2923980 B1 EP 2923980B1 EP 15160658 A EP15160658 A EP 15160658A EP 2923980 B1 EP2923980 B1 EP 2923980B1
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EP
European Patent Office
Prior art keywords
cores
supports
rod
axis
mandrel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
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EP15160658.9A
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English (en)
French (fr)
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EP2923980A1 (de
Inventor
Carlo Brisighelli
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Individual
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Individual
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/22—Changing the web roll in winding mechanisms or in connection with winding operations
    • B65H19/30—Lifting, transporting, or removing the web roll; Inserting core
    • B65H19/305—Inserting core
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/414—Winding
    • B65H2301/4148—Winding slitting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/414—Winding
    • B65H2301/4148—Winding slitting
    • B65H2301/4149—Winding slitting features concerning supply of cores
    • B65H2301/41496—Winding slitting features concerning supply of cores loading pre-arranged set of cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2402/00—Constructional details of the handling apparatus
    • B65H2402/30—Supports; Subassemblies; Mountings thereof

Definitions

  • the present invention concerns a device and method to prepare winding mandrels for re-reeling machines.
  • mandrel and rod are used as synonyms to identify an oblong element, such as a shaft, on which the material to be wound to form reels is wound.
  • Production processes for tissue paper and non-woven fabric like those for other ribbon-like products, provide to rewind the product, previously cut into longitudinal strips of different width, onto cylindrical cores made of paper or plastic material, inserted on rods or shafts equipped with pneumatic or mechanical expanders that keep the cores in a predetermined position.
  • the position of the cores must be such that the material wound on them corresponds perfectly to the sizes and position of the core on the rod itself.
  • the cut strip shrinks during winding, which entails the need to position the cores on the shaft, keeping a certain distance between them, so that at the end of working the core does not protrude from one or both sides of the wound reel.
  • the expandable rod At the end of the winding process, the expandable rod, without the cores, must be removed from the formed reel. This is obtained by deflating or releasing the expandable rod both directly in correspondence with the zone where the reel is formed, and also in correspondence with a different point where the reel is made to roll.
  • the height at which the rod finds itself at the moment of extraction depends on the diameter of the formed reel, and hence the machine or plant that performs the extraction must be positioned at a variable vertical height, that is, it must make an automatic search for the vertical position of the rod.
  • Present-day machines vertically move a gripping device, generally consisting of a fork that couples (engages) with a throat (groove, saddle) provided for the purpose at the end of the rods.
  • the device for deflating the rod is inserted in correspondence with the gripping device.
  • the rod is totally or partly extracted from the reel, exerting a traction force.
  • the totally extracted rod is kept cantilevered, held at its end so that the operator can position the cores, inserting them manually on the rod.
  • the correct positioning of the cores is facilitated by mechanical abutments that approach the expandable rod and that constitute a mechanical abutment for the cores.
  • the rod partly extracted from the reel, is positioned between two rubberized rollers, motorized electrically or hydraulically, which are pressed laterally on the cylindrical body of the rod and allow it to be totally extracted from the formed reel.
  • the extracted rod is inserted inside the cores, previously positioned either manually or automatically inside the supports; after the rod has been inserted inside the cores the rod is inflated so that the cores are stably integrated with the rod.
  • the cores can be previously cut into elements with a suitable length or can be whole and then cut after they have been inserted on the expandable rod.
  • WO0061480 US665529
  • the first of these extracts the rod from the reels by using a pair of rubberized rollers and at the same time inserts the rod inside a single core, not cut.
  • the combined rod-core is transferred by rolling to the second station where the core is cut into elements, and at the end of the cutting operations the core is transferred by rolling to the return station which transfers the rod to the re-reeling machine.
  • the machine described in WO2007096916 A1 represents an evolution of the previous machine, that is, an evolution of the terminal return station which allows to reposition the cores on the rod so as to allow a distance between the individual elements.
  • the plant for the overall management of the extraction, cutting and insertion operations in any case consists of three separate units.
  • the system described in WO2009004659A1 consists of a combination of machines served by an anthropomorphic robot equipped with a particular gripping device able to: i) deflate the expandable rod, ii) extract it from the reel, and iii) insert the rod inside a sequence of cores, previously cut to size by a machine belonging to the same plant.
  • the robot is able to suitably distance the cores on the expandable rod before reflating and returning the rod inside the re-reeling machine.
  • the rod, complete with cores can be returned either in correspondence with the zone where the reel is formed, or in correspondence with a "tray", which is in a translated position and at a different height from the position where the rod is first collected.
  • expandable rods of different diameters For some productions, it is necessary to use expandable rods of different diameters, depending on production requirements. In some machines currently on the market, mechanical parts must be replaced in order to work cores of different diameters, if this is envisaged. In other machines, different housings are provided for the cores and different collection and return positions, and also different deflating and reflating devices of the expandable rod.
  • the invention concerns a device and method to prepare mandrels or winding rods on which a reel is formed.
  • some embodiments of the method can provide to extract the expandable rod from the reel, to insert it inside cores that have been previously cut and manually positioned on a suitable seating, to inflate the expandable rod or to mechanically clamp it, which allows the cores to remain integrated with the rod, to expel the rod and return it to the re-reeling machine in a translated position and at a different height from that where it was first collected.
  • the purpose of the present invention is also to create a compact device to prepare mandrels that overcomes the limits of current embodiments and, in particular, that allows easy passage from one diameter of the expandable rod to a different diameter.
  • Another purpose of the present invention is to obtain a device to prepare mandrels that allows to position the cores compactly, or distanced from each other, which allows to extract the mandrel or expandable rod directly between the forming rollers of the re-reeling machine.
  • Another purpose of the present invention is to obtain a device to prepare mandrels that allows to extract the rod from the formed reel even when there is minimum distance between the ends of the rod and the reel itself.
  • Another purpose of the present invention is to obtain a device to prepare mandrels that allows to easily remove the rod upward during the cycle, and all these functions integrated in a structural and functional whole.
  • a device to prepare winding mandrels on which to form reels comprising a support structure to which supports are associated configured to support, close to or distanced from each other and on their circumference, a plurality of cores, keeping them aligned along a pre-determined axis of insertion, and a gripping unit configured to allow the introduction of the mandrel into the cores and along the axis of insertion.
  • the device to prepare mandrels comprises adjustment members configured to adjust the position of the supports in a radial direction with respect to the axis of insertion and to dispose the axis of insertion of the mandrel always in the same position with respect to the support structure as at least the diameter of the cores varies.
  • Forms of embodiment of the present invention can also concern a method to prepare winding mandrels on which to form reels, which provides to position a plurality of cores on supports of a support structure, disposing them resting with their circumference on the supports, close or distanced, and aligned along a pre-determined axis of insertion, and to subsequently insert a mandrel in the cores and along the axis of insertion.
  • the method provides a step of adjusting the position of the supports in a direction radial with respect to the axis of insertion and by means of adjustment members, to dispose the axis of insertion of the mandrel always in the same position with respect to the support structure as at least the diameter of the cores varies.
  • the device to prepare mandrels consists of a mobile part installed on a pantograph that allows it to ascend and descend; the pantograph can advantageously be mounted on a slider that also allows it to translate.
  • the device to prepare mandrels comprises, connected to the mobile part: the supports for the cores, a clamping device for the cores, a device or unit for gripping the mobile rod longitudinally, a motorized roller unit, a pneumatic expulsion and inflation device; all these devices are stably connected to each other to form a structural and functional whole.
  • a first step the operator manually positions the cores, previously cut to size, on the supports provided for this purpose.
  • the invention allows to pass from one diameter of the rod and cores to a different diameter simply by adjusting the position of the supports on which the cores are positioned, according to a geometry which, keeping the distance between the axis of the rod and the upper mobile part unvaried, allows to use the same extraction and expulsion devices as the diameter of the cores and rod vary.
  • this adjustment is made manually, but hydraulic or electric drive is not excluded.
  • the invention provides a double method of axial positioning of the cores.
  • a first possible implementation of the method provides that the cores are close to each other: the operator therefore disposes the cores in sequence, a pneumatic or hydraulic device compacts the train of cut cores, and a measuring system analyzes the overall length of the train of cores.
  • a second possible implementation of the method allows to position the cores manually in a predetermined position inside a sequence of abutments attached to a mobile bar and easily inter-changeable.
  • the operator must position the cores exactly in correspondence with the spaces between the partitions; in this way it is possible to obtain a predetermined distance between the different cores as required by the processing of the non-woven fabric.
  • the bar containing the abutments the reciprocal position of which can be varied by simple interventions on the clamping systems, is easily replaced by others, previously prepared for different combinations of sizes and diameters.
  • the machine can advantageously be equipped with components that allow both positioning methods, which can be activated alternately by the control and command system.
  • the automatic extraction cycle is started; the first step is characterized by the tilting movement of an upper closing bar that prevents the radial movement of the cores.
  • the bar In the inoperative condition, the bar is rotated in a position opposite the position where the operator finds himself during the manual loading operations of the cores.
  • This stand-by position is characterized by the fact that the bar, in this position, does not create any obstacle to the lifting of the rod present on the supports.
  • the cores must be prevented from moving axially during the insertion of the rod. Therefore, constant pressure must be exerted on the cores by the upper clamping bar so that the friction force prevents them from slipping.
  • a tubular element made of rubber has been mounted on the lower surface of the upper presser. At the end of the closing of the presser, the tubular element is inflated to a pressure value that is a function of the diameter and thickness of the cores. In this way a force is guaranteed per unit of length of the presser that is absolutely constant and independent of possible structural deformations of the supports.
  • the extraction step is begun; this includes a first step in which a rectilinear element driven by a hydraulic or electromechanical system ending in a fork protrudes from the front central part of the machine in the direction of the re-reeling machine, until it arrives at a predetermined distance from the reel.
  • the photocell positioned as a barrier between the two upper ends of the fork detects the presence of the rod and transmits to the control system the relative height detected by the transducer of the pantograph. Since this height depends on the diameter of the formed reel, it varies during the production process and the search assumes a fundamental importance.
  • the gripping element is returned until the photocell identifies the axial end of the rod; subsequently, since the rod is totally identified both vertically and axially, the extraction fork is positioned exactly in correspondence with the throat with a rising movement of the pantograph combined with the forward movement of the extraction head.
  • the search operation described in the previous points can be excluded if the rod is extracted in a predetermined and always constant position, that is, if the control system of the re-reeling machine transmits to the control system of the machine the exact height at which the rod is collected. In these cases, the fork is positioned in correspondence with the throat of the rod without any search.
  • rods of different diameters will in any case have a throat with the same sizes.
  • the expandable elements which keep the rod clamped inside the cores of the formed reel, are de-activated. This de-activation is obtained with known means, comprised in the terminal part of the extraction device.
  • the mobile extraction element When the de-activation of the expanders is terminated, the mobile extraction element returns in the direction of the extractor and draws with it the rod, whose throat remains inserted inside the fork.
  • the expandable rod is removed only partly from the cores of the formed reel and remains cantilevered.
  • the mobile part of the machine integrated with the extraction head, is made to descend so that the cylindrical part of the rod is in correspondence with two electrically or hydraulically motorized rubberized rollers; the rollers will be closed on the rod and kept forced on it by hydraulic or pneumatic actuators; this technique is already known and used.
  • the rod is aligned concentrically with the cores.
  • the drive of the motors connected to the rollers causes the rod to advance in the direction of the cores.
  • Three mobile plastic elements pivoted to the front end of the support elements of the cores, constitute a lead-in so that the rod is aligned correctly with the cores.
  • a device comprising a pneumatic cylinder and corresponding conical head located on the same axis of the rods, but on the opposite side of the motorized rollers, constitutes the element to decelerate and stop the travel of the rod during pre-insertion.
  • a device pivoted to the mobile extraction part which, lifted by a pneumatic actuator, engages with the terminal part of the rod protruding from the rollers and provides the final positioning by means of the same actuator and the corresponding measuring device; the latter two allow to move the gripping unit.
  • the expander elements of the rod are clamped using known techniques.
  • the machine When the rod has been clamped inside the cores, the machine is taken to the position to return the rod, by acting on the height of the pantograph and/or on the position of the slider so that the rod is returned to its terminal position.
  • the mobile elements that had held the cores located in front of the supports are opened, to allow the removal of the rod, and the rear pneumatic actuator thrusts the rod and the corresponding cores until the external cylindrical surface of the cores is positioned in correspondence with the rubberized rollers.
  • the rubberized rollers are thrust and pressurized on the external surface of the rod and will cause the expulsion of the cores as in known techniques.
  • the rod remains cantilevered, only partly inserted in its return point; the upper part of the machine is made to ascend by a sufficient quantity so that the exit of the extraction element allows to thrust the rod to its definitive position without needing to obtain mechanical contrasts for the correct positioning thereof.
  • a support structure is rigidly connected, which defines the main body 6 of the machine 1 to which are connected: a unit for gripping the rod 4 able to move in f4, two drawing units 5, in this specific case motorized rollers 54 able to move in f5, a reclinable structure or mobile support presser unit 65, a clamping device or upper presser 653 able to rotate as indicated by f6, supports 61a, 61b for the cores, and a rear thruster.
  • the drawing units 5 are configured to introduce into the device 1 the rod P along an axis of insertion Z, disposing the rod P substantially parallel to the oblong development of the supports 61a, 61b.
  • the pantograph lifter 3 is configured to move the support structure 6 vertically and to adjust the relative height of the device.
  • the clamping device 653 comprises a closing bar, able to be selectively activated in correspondence with a front plane of the device, to prevent the radial movement of the cores.
  • the supports 61a, 61b comprise rectilinear elements, in this specific case the base profiles 612 lying on specular planes with respect to a front plane of the device, and on which the rod is positioned during use.
  • At least one mobile rear contrasting element is associated with the support structure 6, with the function of a mobile compacting element 611 configured to assume a closed condition that prevents the axial sliding of the cores N and facilitates the introduction of the mandrel P inside the cores N, and an open condition that allows the cores N to slide freely on the supports 61a, 61b.
  • the presser 653 connected by adjustment elements to the reclining structure or presser unit 65; the presser 653 is equipped with the front stop element of the cores 614, moved by the pneumatic actuator 613, a mobile compacting element 651 that is moved by an actuator 650 and is connected to a position transducer 652.
  • the thruster unit 60 consisting of a pneumatic cylinder 601 and an inflation device 602 for the expandable rod.
  • the drawing units 5 provided with a structure 50 free to move along guides 52 thanks to a group of wheels 53 and on which hydraulic motors 51 are mounted, equipped with rubberized rollers 54. To allow the correct centering of the rod the symmetric movement of the two drawing units 5 is guaranteed by a synchronization cam 56.
  • the gripping unit 4 which in this specific case consists of a structure with U-shaped profiles 41, a terminal fork 42 equipped at the rear with one or more photocells 43 as a barrier or transducer.
  • the main body 6 comprises a mobile positioning arm 40 able to move in the direction indicated by arrow f5.
  • the gripping unit 4 comprises a horizontally mobile rectilinear element, in this specific case the structure with U-shaped profiles 41 equipped at its end with the fork 42 configured to engage with a throat of the rod or mandrel.
  • the horizontally mobile rectilinear element is connected to an arm, in this specific case the mobile positioning arm 40, selectively mobile vertically, configured to assume a first position in which it is suitable to engage with one end of the mandrel P, and a second position of non-interference with the movements of the mandrel P.
  • the transducer 43 is configured to measure the excursion of the horizontally mobile rectilinear element 41.
  • Fig. 4 shows in section E-E (of fig. 3b ) a possible method for obtaining the adjustment of the diameter of the cores, keeping the axis of insertion of the rod unvaried; racks 621 supported by idle wheels 623 engage a toothed wheel 622, and the base profiles 612, which define the supports 61a, 61b of the cores, are rigidly mounted on said racks 621.
  • the supports 61 a and 61b are installed mobile linearly and so that the movement trajectories of the supports 61a and 61b, identified in fig. 4 by f11, intersect in correspondence with an axis defining the axis of insertion Z of the rods P in the cores N.
  • the supports 61a and 61b are able to move symmetrically with respect to the front plane, to position themselves at a distance from the axis of insertion Z equal to the radius of the cores N that are installed.
  • the supports 61a and 61b are movable along the trajectories f11 by adjustment members, which in this specific case are defined by racks 621, although it is not excluded that other forms of embodiment can comprise other types of movement mechanisms such as jack screws, worm screw mechanisms or suchlike.
  • the supports 61a and 61b are angularly distanced from the axis of insertion Z by a determinate angle.
  • the device according to the present invention is equipped with two supports 61a and 61b, angularly distanced from each other by an angle of 120°.
  • each support 61a and 61b is angularly distanced with respect to the axis of insertion Z from the presser unit 65 when the latter is in its operating condition, by an angle of 120°. In this way it is possible to ensure an optimum holding of the reels when the rod P is extracted from the latter.
  • the drawing unit 5 is installed on the main body 6 positioned substantially aligned with the axis of insertion Z.
  • the rubberized rollers 54 of the drawing unit 5 define a gap between them, through which the rod P is positioned during use, and which is located substantially aligned with the axis of insertion Z.
  • Fig. 4a shows a pneumatic tubular element 655 attached on the upper presser 653, while fig. 4b shows the relative position between the base profile 612 and a guide 640, or extruded line, of the support element 64 on which spacer partitions 641 or abutments are mounted.
  • the abutments 641 are attached, in a reciprocally positionable manner, on the support element or bar 64 able to be associated with the support structure 6.
  • the supports 61a, 61b are associated with adjustment and clamping member 624, 625 and 626 to adjust and clamp the position of the supports 61a, 61b.
  • the device comprises a command lever 624 associated at least with the rectilinear elements 612 to selectively position the supports 61a, 61b in correspondence with pre-set notches or references.
  • Fig. 5 describes a possible method for adjusting and clamping the supports 61a and 61b: stems that connect the front rack 621 and rear rack are keyed onto a command lever 624 equipped with a pawl device 625 that is inserted into the grooves made on a disc 626.
  • the disc 626 is easily interchangeable to configure the position of the supports 61a, 61b according to production needs.
  • Fig. 6 shows a section of the machine on the plane G-G (of fig. 3a ), with a possible form of construction in particular of the gripping unit 4, showing: the structure with U-shaped profiles 41, the terminal gripping fork 42 integrated therewith, accompanied by the barrier photocells 43, a unit 44 to deflate the expandable rod, a mobile positioning arm 40 and a corresponding pneumatic lifting cylinder 43a.
  • a hydraulic cylinder 46 that commands the movement of the gripping unit 4.
  • Rubberized rollers 54 are also shown, connected to the hydraulic motors 51 and a cylinder 55 for closing the drawing unit 5, complete with transducer.
  • the support element 64 can be seen, with the spacer partitions 641 and the mobile units 63a, 63b to which it is connected.
  • Fig. 7 shows the machine in which the part relating to the presser has been deliberately hidden, so as to show the support element 64 with the function of linear positioning of the spacer partitions 641 connected to them.
  • the mobile units 63a and 63b can consist of a guided linear pneumatic actuator 630, to the mobile part of which a (known) rapid release handle 631 is connected, on which the extruded line 640 is clamped, on which the spacer partitions 641 are positioned.
  • the abutments 641 are selectively positionable in a direction parallel to the axis of insertion Z and configured to determine a precise positioning of the cores N on the supports 61a, 61b.
  • Fig. 8 contains more details that allow an exact comprehension of the support element 64 with a function of separating the cores, and shows the spacer partitions 641 and the respective clamping elements 642 provided to constrain the spacer partitions 641 to the support element 64.
  • Figs. 9a to 9o describe the functional sequence, step by step, to prepare rods P with distanced cores N, characterized by an obligatory positioning of each of the cores N between two contiguous spacer partitions 641. This type of working is necessary in processes where the ribbon-like product is subjected to a contraction in size during re-winding, such as for example non-woven fabric.
  • Fig. 9a shows the manual loading step of the cores N with the presser unit 65 totally open and tilted.
  • the cores N are inserted between contiguous spacer partitions 641 and in front abutment against the front stop elements 614.
  • Fig. 9b shows the upper presser unit 65 closed, and the subsequent inflation of the tubular element 655 to clamp the cores in the correct position.
  • Fig. 9c shows the step where the terminal fork 42 integrated with the gripping unit 4 is inserted into the throat of the rod P according to a sequence of movements indicated by f3 and f4. During this step, the method to search for the position of the rod P is implemented, indicated in the description and claimed on the basis of the indications supplied by the barrier photocell 43.
  • Fig. 9d shows the step where the rod P is partly extracted from a reel B defined by cores N on which the material is wound, making the gripping unit 4 return until it takes the cylindrical body of the rod P in correspondence with the rubberized rollers 54.
  • the drawing units 5 in this step are open.
  • Fig. 9e shows the step where the pantograph descends as indicated by f3 so that the cantilevered rod P is positioned exactly between the rubberized rollers 54.
  • Fig. 9f shows the step where the rubberized rollers 54 draw near f5 to the cylindrical body of the rod P and the definitive extraction fP and the simultaneous insertion of the rod P inside the cores N are obtained.
  • the gripping unit 4 protrudes with respect to the main body 6, as indicated by f4.
  • Fig. 9g shows the step where, the rollers having completed the extraction, the mobile positioning arm 40 is lifted f7 and inserted at the conical end of the rod P while the group of hydraulic motors 51 moves away, freeing the rod P.
  • Fig. 9h shows the step where the gripping unit 4, returning in f4, takes the rod P to its definitive position inside the cores N.
  • the rod P is held clamped by the contribution of contrary force exerted by the antagonist cylinder 601.
  • the rod is clamped using the inflation device.
  • Fig. 9i shows the step where the mobile positioning arm 40 is lowered and the gripping unit 4 is made to return, according to the sequence indicated by f7 and f4.
  • Fig. 9j shows the step where the presser unit 65 is lifted and rotated, and the front stop elements 614 are opened.
  • the guide 640 connected to the spacer partitions 641, is distanced to allow the rod P to exit freely.
  • Fig. 9k shows the step where the rod P, integrated with the cores N, is thrust by the cylinder 601 and corresponding pumping device 602, or conical inflation element, so that the external surface of the first core N finds itself in correspondence with the rubberized rollers 54.
  • Fig. 9l shows the step where the rod P, complete with cores N, is transferred to the return point by the rubberized rollers 54 and corresponding motors. Note that the return point may be in a different position from the gripping position, because during at least one of the previous steps the pantograph will have translated and ascended or descended.
  • Fig. 9m shows the step where, having terminated the expulsion step using the rubberized rollers 54, the rod P remains cantilevered, held by the return seating belonging to the re-reeling machine.
  • the pantograph 3 makes the main body ascend as indicated by f3 until the end of the rod P is positioned at the height of the gripper unit 4 or extraction head.
  • Fig. 9n shows the terminal step where the rod P is thrust and correctly positioned inside a return device by the exit movement of the extraction head 4 indicated by f4.
  • Figs. 10a to 10q describe the functional sequence step by step to prepare rods P with cores N close to each other. This type of working is useful in processes where the ribbon-like product is not subjected to a contraction in size during re-winding, such as for example paper and tissue paper.
  • Fig. 10a shows the manual loading step of the cores N with the presser unit 65 totally open and tilted.
  • the cores N are positioned manually on the supports 61 a and 61b according to the cutting sequence provided, and can also be positioned slightly distanced Dn.
  • the front stop elements 614 are closed, so that the operator can dispose the cores N close to the clamping device.
  • Fig. 10b shows the upper presser unit 65 closed, and the subsequent closing of the front stop element 614 belonging to the presser unit 65.
  • Fig. 10c shows the step where the mobile compacting elements 611 and 651 acting on the terminal circular crown of the cores N, driven by means of the actuators 610 and 650, or pneumatic cylinders exert a thrust f9 on the train of cores N that, clamped at the front by the front stop element 614, are compacted with respect to each other.
  • the position transducer 652 installed in correspondence with the upper presser unit 65 transmits to the control system the overall length of the group of cores to verify congruity.
  • Fig. 10d shows the step where the gripping unit 4 exits in the direction of the formed reel B and the terminal fork 42 is inserted into the throat of the rod P according to a sequence of combined movements indicated by f3 and f4. During this step, the method to search for the position of the rod P is implemented, indicated in the description on the basis of the indications supplied by the barrier photocell 43.
  • Fig. 10e shows the step where the rod P is partly extracted from the reel B, making the gripping unit 4 return until it takes the cylindrical body of the rod P in correspondence with the rubberized rollers 54.
  • the motor or drawing units 5 in this step are open.
  • Fig. 10f shows the step where the pantograph 3 descends as indicated by f3 so that the cantilevered rod P is exactly positioned in height between the rubberized rollers 54.
  • Fig. 10g shows the step where the rubberized rollers 54 draw near f5 to the cylindrical body of the rod P and the definitive extraction fP and the simultaneous insertion of the rod P inside the cores N are obtained.
  • the extraction head 4 is repositioned as indicated by f4.
  • Fig. 10h shows the step where, the rollers having competed the extraction, the mobile positioning arm 40 is lifted f7 and inserted at the conical end of the rod P while the motor or drawing unit 5 moves away, freeing the rod P.
  • Fig. 10i shows the step where the gripping unit 4, returning in f4, takes the rod P in its definitive position inside the cores N.
  • the rod P is held clamped by the contribution of contrary force exerted by the pneumatic cylinder 601.
  • the rod P is clamped to the cores N using the pumping device 602.
  • Fig. 10j shows the step where the mobile positioning arm 40 is lowered and the gripping unit 4 is made to return, according to the sequence indicated by f7 and f4.
  • Fig. 10k shows the step where the presser unit 65 is lifted and rotated, and the front stop elements 614 are opened.
  • Fig. 10l shows the step where the rod P, integrated with the cores N, is thrust by the pneumatic cylinder 601 and corresponding conical inflation element, that is, the pumping device 602, so that the external surface of the first core N finds itself in correspondence with the rubberized rollers 54.
  • the motor units or drawing units 5 are pressurized against the rod P according to f5.
  • Fig. 10m shows the step where the rod P, complete with cores N, is transferred to the return point by the rubberized rollers 54, drawing units 5 and corresponding motors. Note that the return point may be in a different position from the gripping position, because during at least one of the previous steps the pantograph 3 will have translated and ascended or descended.
  • Fig. 10n shows the step where, having terminated the expulsion step using the rubberized rollers 54, the rod P remains cantilevered, held by the return seating belonging to the re-reeling machine.
  • the pantograph 3 makes the machine ascend as indicated by f3 until the end of the rod P is positioned at the height of the extraction head 4.
  • Fig. 10o shows the terminal step where the rod P is thrust and correctly positioned inside the return device by the exit movement of the extraction head 4 indicated by f4.

Landscapes

  • Winding Of Webs (AREA)
  • Moulding By Coating Moulds (AREA)

Claims (22)

  1. Vorrichtung zur Vorbereitung von Wickeldornen (P), auf denen Rollen geformt werden, umfassend eine Stützstruktur (6), mit der Stützen (61a, 61b) verbunden sind, die dafür eingerichtet sind, um eine Vielzahl von Kernen (N), entweder einander nah oder voneinander fern und an ihrem Umfang, zu stützen, indem diese entlang einer vorbestimmten Einführungsachse ausgerichtet gehalten werden, und eine Greifeinheit (4), die dafür eingerichtet ist, um die Einführung des genannten Dorns (P) in die Kerne (N) und entlang der Einführungsachse zu ermöglichen, dadurch gekennzeichnet, dass sie Einstellelemente (621) umfasst, die dafür eingerichtet sind, um die Lage der Stützen (61a, 61b) in einer radialen Richtung im Hinblick auf die Einführungsachse einzustellen und die Einführungsachse des genannten Dorns (P) immer in derselben Lage im Hinblick auf die Stützstruktur (6) anzuordnen, während zumindest der Durchmesser der Kerne (N) sich ändert.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Stützen (61a, 61b) beweglich sind und sich symmetrisch bewegen können, um sich an einem Abstand von der Einführungsachse zu positionieren, der dem Radius der Kerne (N) entspricht.
  3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass Einstell- und Spannelemente (624, 625, 626) mit den genannten Stützen (61a, 61b) verbunden sind, um die Lage der Stützen (61a, 61b) einzustellen und zu spannen.
  4. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Stützen (61a, 61b) geradlinige Elemente (612) umfassen, die auf Ebenen liegen, die spiegelbildlich im Hinblick auf eine Frontebene der genannten Vorrichtung sind.
  5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass sie einen Steuerhebel umfasst, der zumindest mit den geradlinigen Elementen (612) verbunden ist, um die Stützen (61a, 61b) an voreingestellten Kerben oder Bezugselementen selektiv zu positionieren.
  6. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie eine Spannvorrichtung (653) umfasst, die dafür eingerichtet ist, um die Kerne (N) zumindest in einer radialen Richtung und gegen die Stützen (61a, 61b) zu spannen.
  7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, dass die Spannvorrichtung eine Verschlussstange (653) umfasst, die an einer Frontebene der genannten Vorrichtung selektiv betätigt werden kann, um die radiale Bewegung der Kerne (N) zu verhindern.
  8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass ein rohrförmiges Element (655) aus Gummi, das selektiv aufblasbar ist, um die Position der Kerne (N) auf den Stützen (61a, 61b) zu binden, mit der Verschlussstange (653) verbunden ist.
  9. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zumindest ein hinteres bewegliches Gegenelement (611), das so eingerichtet ist, um einen geschlossenen Zustand, der das axiale Gleiten der Kerne (N) verhindert und das Einführen des Dorns (P) in die Kerne (N) hinein erleichtert, und einen offenen Zustand einzunehmen, der den Kernen (N) ermöglicht, frei auf den Stützen (61a, 61b) zu gleiten, mit der Stützstruktur (6), und in der Nähe eines ersten Endes der Stützen (61a, 61b), verbunden ist.
  10. Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, dass sie eine Messeinrichtung zur Messung der axialen Bewegung des hinteren beweglichen Gegenelements (611) umfasst, die so eingerichtet ist, um die tatsächliche Länge der Gesamtheit der Kerne (N) festzulegen, die auf den Stützen (61a, 61b) angeordnet sind, und um die Positionierung des Dornes (P) zu ermöglichen.
  11. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zumindest ein vorderes Anschlagelement (614), das selektiv betätigt werden kann, um die ringförmige Endfläche der Kerne (N) einzugreifen und die Kerne (N) axial entlang der Einführungsachse zu bewegen und sie zusammenzudrücken, wodurch ihr Abstand voneinander aufgehoben wird, mit der Stützstruktur (6), und in der Nähe eines zweiten Endes der Stützen (61a, 61b), verbunden ist.
  12. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie eine Vielzahl von Anlagen (641) umfasst, die in einer Richtung parallel zur Einführungsachse selektiv positioniert werden können und die dazu eingerichtet sind, um eine genaue Positionierung der Kerne (N) der Stützen (61a, 61b) festzulegen.
  13. Vorrichtung nach Anspruch 12, dadurch gekennzeichnet, dass die Anlagen (641), in einer wechselseitig positionierbaren Weise, auf einer Stange (64) angebracht sind, die mit der Stützstruktur (6) verbunden werden kann.
  14. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Greifeinheit (4) ein horizontal bewegliches geradliniges Element (41) umfasst, das an seinem Ende mit einer Gabel (42) versehen ist, die dafür eingerichtet ist, um mit einer Nut des Dorns (P) einzugreifen.
  15. Vorrichtung nach Anspruch 14, dadurch gekennzeichnet, dass sie einen Wandler (43) umfasst, der dafür eingerichtet ist, um den Verfahrweg des horizontal beweglichen geradlinigen Elements (41) zu messen.
  16. Vorrichtung nach Anspruch 14 oder 15, dadurch gekennzeichnet, dass ein Arm (40), der selektiv vertikal beweglich und dafür eingerichtet ist, um eine erste Position, in der er dazu geeignet ist, mit einem Ende des Dorns (P) einzugreifen, und eine zweite Position von Nicht-Eingriff mit den Bewegungsvorgängen des Dorns (P) einzunehmen, mit dem horizontal beweglichen geradlinigen Element (41) verbunden ist.
  17. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie einen Pantograph-Heber (3) umfasst, der dafür eingerichtet ist, um die Stützstruktur (6) vertikal zu bewegen und die relative Höhe der Vorrichtung einzustellen.
  18. Vorrichtung nach Anspruch 17, dadurch gekennzeichnet, dass sie einen Schlitten (2) umfasst, auf dem der Pantograph-Heber (3) installiert ist, wobei der Schlitten (2) dafür eingerichtet ist, um die Stützstruktur (6) zu verschieben.
  19. Verfahren zur Vorbereitung von Wickeldornen (P), auf denen Rollen geformt werden, das vorsieht, eine Vielzahl von Kernen (N) auf Stützen (61a, 61b) einer Stützstruktur (6) zu stellen, indem diese so angeordnet werden, dass ihr Umfang auf der Stütze (61a, 61b), entweder nah oder voneinander fern, aufliegt und sie entlang einer vorbestimmten Einführungsachse ausgerichtet sind, und anschließend einen Dorn (P) in die Kerne (N) und entlang der Einführungsachse einzuführen, dadurch gekennzeichnet, dass es einen Schritt des Einstellens der Lage der Stützen (61a, 61b) in einer radialen Richtung im Hinblick auf die Einführungsachse und mittels Einstellelemente (621) vorsieht, um die Einführungsachse des Dorns (P) immer in derselben Lage im Hinblick auf die Stützstruktur (6) anzuordnen, während zumindest der Durchmesser der Kerne (N) sich ändert.
  20. Verfahren nach Anspruch 19, dadurch gekennzeichnet, dass die Stützen (61a, 61b) symmetrisch bewegt werden, um sie an einem Abstand von der Einführungsachse zu positionieren, der dem Radius der Kerne (N) entspricht.
  21. Verfahren nach Anspruch 19 oder 20, dadurch gekennzeichnet, dass es während des Positionierens vorgesehen ist, die Kerne (N) mittels einer Spannvorrichtung (653) zumindest in einer radialen Richtung und gegen die Stützen (61a, 61b) zu spannen.
  22. Verfahren nach Anspruch 19, 20 oder 21, dadurch gekennzeichnet, dass es zumindest einen optischen Erfassungsschritt vorsieht, um die Lage des Dorns (P) zu erfassen, um die anschließende Positionierung der Stützen (61a, 61b) zu ermöglichen.
EP15160658.9A 2014-03-25 2015-03-24 Vorrichtung und verfahren zur vorbereitung von dornen für umwickelmaschinen Not-in-force EP2923980B1 (de)

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CN114473368B (zh) * 2022-03-31 2022-07-08 佛山美科智能科技有限公司 全自动拔轴穿管机

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Publication number Priority date Publication date Assignee Title
US665529A (en) 1900-05-31 1901-01-08 Columbus Pharmacal Company Artificial leg.
DE1112392B (de) * 1959-09-04 1961-08-03 Paper Converting Machine Co Vorrichtung zum Zufuehren von Wickelkernen in einer Papierwickelmaschine
IT1308270B1 (it) 1999-04-12 2001-12-10 Celli Spa Impianto e metodo per la preparazione di mandrini ed anime diavvolgimento per macchine ribobinatrici o simili
GB0122783D0 (en) * 2001-09-21 2001-11-14 Holmdale Prec Ltd A core positioning apparatus
ITMI20012274A1 (it) * 2001-10-29 2003-04-29 Bielloni Castello S P A Ribobunatrice automatica particolarmente per film flessibile di materiale plastico e relativo metodo di produzione di rotoli
WO2007096916A1 (en) 2006-02-27 2007-08-30 A. Celli Nonwovens S.P.A. Method and device to prepare tubular winding cores
DK2162374T3 (da) 2007-07-04 2014-02-24 Celli Nonwovens Spa System og fremgangsmåde til at fremstille vikledorne til at danne ruller

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