FR2676427A1 - METHOD AND DEVICE FOR WINDING A FILM STRIP - Google Patents

Abstract

The object of the invention is a device for winding a strip of film of material on a collecting tube using a train of freely rotating application rolls and formed of a first and a second roll parallel to the tube. collector. In the winding position, the first and the second cylinder 25, 26 are applied towards the outer surface of the coil 5 by separate return means located on either side of each cylinder and each acting respectively on an arm pivoting 28, 30, one end of which carries a cylinder bearing and the other end of which is articulated on a movable carriage 19a, 20a on a guide surface 19, 20. Application to the automatic winding at high speed of very thin films and to the 'obtaining perfectly regular coils.

Description

METHOD AND DEVICE FOR WINDING A

FILM BAND

  The present invention relates to a device for winding a strip of material film on a collector tube driven in rotation by a spindle and on which the

  film strip is wound to form a cylindrical spool.

  with the aid of a freely rotating roll of application rolls formed of first and second cylinders parallel to the collecting tube, the first of said rolls, partially surrounded in service by the film strip, being tangent to the second cylinder by clamping the film strip thereon and on the outer surface of the coil to which it applies the film. The invention also relates to the method of winding a filmstrip, applied to a

winding device of this type.

  A large number of winding devices exist for thin strips of materials such as paper and plastic which are delivered to users in coiled rolls on cylindrical collector tubes generally made of cardboard. thickness that can be described as films or films and which are, for example, made of an elastic and deformable material such as plastic material, winding successive thin layers whose surface is really flat only when the film is under tension proves very difficult to achieve with regularity The coils of such films always show to the eye irregularities

  depositing the film during winding.

  Furthermore, there has been a need to wind certain plastics transformed into thin and resistant sheets into a roll that can be used directly and therefore placed at the width of the production line of the plastic strip material.

  One of the objects of the present invention is

  to propose a device for winding a band of

  film that allows you to get straight out of the process-

  production of the material a coil of film wound regularly on itself and whose winding can be

  triggered and automatically followed by regular

  the film on the outer surface of the spool using

  application cylinders with controlled pressure and

  to faithfully follow the growth of the coil diameter while being able to adjust position and shrinkage. According to another object of the invention, the device

  winding shall allow easy

  automatic troduction of the end of the coil, for the

start of winding.

  According to yet another object of the invention, the

  winding, when it has several tubes collec-

  each of them on one of the arms of a rotating coil support, must allow the withdrawal of the application rollers to allow free passage of the arms of the

  support, these arms being loaded where appropriate with a coil.

  According to yet another object of the invention, the provision

  The winding device must comprise, upstream of the application rolls, a group of feed rollers cooperating with cutters and members of the width of the film strip, as well as means for evacuating

tape after cutting.

  According to yet another object of the invention, the provision

  The winding system must have means for manually adjusting the position of each of the application cylinders and

  feeding and cutting organs.

  According to other objects of the invention, the winding method used for the implementation of the winding device must make it possible to automatically perform the start

  winding and switching from one film reel to another.

  According to the invention, in the winding position, the first cylinder and the second cylinder are respectively applied on the outer surface of the coil and on the first cylinder by separate return means located on either side of each cylinder and each acting respectively on a pivoting arm whose one end carries a bearing of the cylinder and whose other end is articulated

  on a movable carriage on a guide surface, the surfaces

  these guiding a cylinder being parallel to each other and the movements of the two carriages of a cylinder being synchronized by mechanical synchronization means

connecting the two carts.

  According to another embodiment of the invention, each of the return means is capable of acting on the

  corresponding swivel arm to rotate it elastically-

  to a position of extreme rotation, in the case where the first or second cylinders are not subjected to the respective reaction action of the cylindrical coil and the first cylinder The return means are constituted by a pneumatic cylinder to piston movable in a cylinder and whose piston rod is articulated to an extension of the pivoting arm while the end of the pneumatic cylinder, opposite the piston rod, is hinged to the corresponding carriage. According to another embodiment of the invention, in the starting or initialization position of the winding, the carriages of the first cylinder are able to move away from the cylindrical coil to a retracted position for which the first cylinder is no longer in

  contact with the second cylinder and with the outer surface

  the coil, so as to provide a passage between it and the second cylinder for the introduction of

  the end of the winding film The trolleys of the second cycle

  lindre are likely to be held in position while their pivoting arms are brought to a position

stop by the return means.

  According to another embodiment of the device of

  winding, where it has more than one collection tube

  each of the arms of a rotating coil support, the carriages of the first and second cylinders are

  guidance in the retracted position away from the cylindrical coil

  to rotate the support arms

  coil loaded with their coil or a collector tube.

  According to yet another embodiment of the winding device according to the invention, it comprises, applied on the film strip upstream of said application roll, a stream of feed and cutting cylinders of the film strip. The feed cylinder train has a third transfer cylinder to the second cylinder, a fourth tension cylinder of the film web during the

  cutting and a fifth cylinder of stabilization and hand-

  one of the film web during cutting, the third, fourth and fifth cylinders being placed parallel, in the operating position, substantially superimposed and at a distance from each other, and the film strip being wound, before reaching the second cylinder, partially on said

  feeding cylinders in opposite directions of a cylinder

to the other.

  According to yet another embodiment of the invention,

  At least one knife is applied to the filmstrip

  stretched between the fourth and fifth cylinders.

  According to another embodiment of the invention, the end bearings of the third, fourth and fifth cylinders are each carried by a movable carriage on a

  guide surface, disposed substantially horizontally

  laterally with respect to the cylindrical film reel, the two carriages of a cylinder being synchronized by mechanical synchronizing means and capable of moving, at least for the third and fifth cylinders, from an advanced position towards the reel of

  film, to a withdrawal position.

  According to yet another embodiment of the invention,

  the five cylinders have substantially the same length, the guide surfaces of the carriages of these five cylinders are carried by two parallel vertical plates spaced substantially from the width of the cylinders and which are

  substantially horizontal and parallel to each other.

  According to yet another embodiment of the invention, in a starting or initialization position of the winding, the trolleys of the third and fifth cylinders

  are likely to be moved on their guiding surfaces.

  by moving closer to the cylindrical coil to an advanced position between these two cylinders, on the one hand, and the fourth cylinder on the other hand, a passage

  allowing the introduction of the end of the film to be wound.

  According to yet another embodiment of the invention,

  the two parallel vertical plates carry a beam arranged parallel to the cylinders at the fourth cylinder and the opposite side to the cylindrical film reel relative to the fourth cylinder, and the beam carries at its upper part a knife mounted on a support movable whose position is adjustable on the beam in the direction parallel to the axis of the beam and in the direction perpendicular to the axis of the beam and the knife is applied to the film stretched between the fourth and the fifth cylinder, to adjacent to the latter The beam carries at least one collection tube of a film drop strip, separated by said knife from the film strip.

  collection is carried substantially horizontally

  below the beam and opens on the film strip by a beak opening below the fourth cylinder The collection tube may comprise means severing the

falling film strip.

  According to another embodiment of the invention, the

  extreme positions of the carriages of the first and second cylinders.

  on their guide surfaces are manually adjustable

  by moving an electrical contact stop or

  electronic control of a drive motor of displacement

  In the same way, the extreme positions of the trolleys of the third, fourth and fifth cylinders on their guiding surfaces are

  manually adjustable by movement on the corresponding plate.

  of an electrical or electronic contact

  control of a drive motor of the synchro-

  of two carriages of a cylinder means of synchronization

  Mechanical assembly of the two carriages of a cylinder comprise mechanical means for interrupting the synchronization, able to allow the positioning of adjustment of one of said carriages independently of the other which is synchronized thereto. According to other embodiments of the invention, the first cylinder is covered with an elastomer material, while the second cylinder is a solid cylinder with high rigidity and covered with a layer of chromium and the other cylinders are in aluminum covered with a layer

black anodized.

  The method of winding a strip of material film onto a collector tube rotated by a spindle and on which the film strip is wound to form a

  cylindrical coil by means of a cylinder train of appli-

  cation formed of a first and a second cylinder pressing the film strip partially wound on the first cylinder, respectively on the outer surface of the coil and on the first cylinder, is characterized in that one assembles each of the bearings end of the first and second cylinders on a pivoting arm carried by a carriage movable on a guide surface by synchronizing the movements on their guide surface of the two carriages of the same cylinder, in that each arm is requested pivoting in rotation by separate biasing means tending to push respectively the first cylinder on the

  film reel and the second cylinder on the first cylinder-

  dre and in that, for the beginning or the initialization of the winding, the two carriages of the first cylinder are moved on their guiding surface to move them away from the film reel and open between the first and second cylinders a passage in which one introduces the end of the film to wind, and before starting the winding, the carriages are recalled to their starting position to press the film strip on the spool and on the first cylinder When several collector tubes are each arranged on one the arms of a rotating spool support, before the rotation of the spool support, the carriages of the first and second cylinders are moved on their guiding surfaces to move them away from the film reel and to allow the free passage of an arm carrier loaded with a collection tube or a

film roll.

  According to another embodiment of the winding method according to the invention, in which is applied on the film strip, in alternately opposite directions and upstream of the application roll train, a feed roll train, each of the end bearings of at least one alternating feed roller is mounted on a movable carriage on a guide surface by mechanically synchronizing the movements of the two carriages with at least one cylinder; on their guiding surfaces, the carriages of alternating cylinders alternately to bring them closer to the film reel and open, between the alternating cylinders, a passage in which the end of the film to be wound is introduced and, after the beginning of winding, we recall the carriages to their position of

  to apply the strip of film in contact with the cylinders.

power supply.

  Other purposes, advantages and features appear

  read the description of various modes of

  embodiment of the invention, made in a nonlimiting manner and with reference to the accompanying drawing, in which: FIG. 1 is a diagrammatic side view of the winding device according to the invention in the service position, that is to say winding; Figure 2 shows in perspective from above a portion of the device of Figure 1; FIG. 3 represents in perspective, according to a more plunging and larger viewing angle

  scale, part of the device

  shown in Figure 2; FIG. 4 is a diagrammatic side view on a smaller scale than in FIG. 1, the winding device of FIG. 1, in the winding start position; Figure 5 shows in rear view the portion of the cutting means of the device of Figure 1;

  FIG. 6 is a diagrammatic cross sectional view of

  the feed rolls and a cutter and drop collection member of the winding device of FIG. 1; FIG. 7 represents, on the same scale as in FIG. 4 and in diagrammatic side view, the winding device of FIG. 1, in the retracted position of the rolls to allow the rotation of a spool on the rotating spool support. ; FIG. 8 represents the winding device of FIG. 7 at the instant when the winding has stopped on a completed coil and begins

on a new collector tube.

  Referring to Figure 1 which shows in side view the entire winding device 1 of a film strip 2 of a material capable of forming strips of thin or very thin films, such as the material polyester plastic, it can be seen that the winding device consists of a

  assembly 3 of support coils and a set 4 of sup-

  supply, guiding, and film-wrap cylinders 2 The film reels 5 are wound on

  a collector tube 6 generally made of cardboard and

  dragged in rotation by a winding spindle using a

  motor and / or transmission not shown.

  The coil support assembly 3 comprises a frame 7 placed on a base 8 and which carries an assembly 9 of arms 10, 11, 12 regularly distributed around a support axis 9 fixed to the frame 7 The assembly 9 rotates around the axis 9a to move the coils 5 of a winding position on the spindle 13, as shown, at a reel removal position of the spindle 14 After removing the spool 5,

  can mount a new collector tube 6 on the arm 10.

  In the case of a three-armed assembly 10, 11, 12, the arm 10 passes, after rotation about the axis 9a, in the upper position 11 waiting It is obvious that one can provide a set 3 support cylinders with two active arms,

  diametrically opposite, or more than three arms.

  The cylinder support assembly 4 carries at its lower part a hoop 16 for automatic coil change.

  and whose function will be explained later.

  4 support of the various cylinders that supply power to

  tation and guiding the film 2, is carried by two plates

  parallel vertical lines 17 and 18 (only the plate 17 is

  shown in Figure 1, see Figure 2) to the upper half of which are formed five horizontal guide rails 19, 20, 21, 22, 23 for corresponding carriages 19 to 23 on the plate 17 and respectively

19 b to 23 b on the plate 18.

  Each of the carriages carries an end bearing of a guide cylinder of the film web As shown in FIG. 1, these guide cylinders constitute two trains or groups whose general functions are different. A train of application cylinders 24 comprises a first cylinder 25, made for example by a hollow metal tube covered with elastomer on its outer surface and which, in the operating or winding position (see FIG. 1), is surrounded on about 1800 by the film strip 2 and is applied tangentially along a line (in fact a narrow band) on the outer surface of the spool 5, or the collector tube 6 at the beginning of the winding.

  comprises a second cylinder 26 which is applied tangentially

  tially on the first cylinder 25 and which is for example a massive cylinder with high rigidity covered with a layer of chromium to resist abrasion and well spread the film. Cylinders 25 and 26 turn idle (ie they are not motorized) on their corresponding end bearings. FIG. end bearings on one side of the cylinders and FIG. 3 shows the inlet of the end bearings 28a and 30a. The end bearings of the cylinders 25 and 26 are not directly worn. by the carriages movable on the slides but by pivoting arms 27 to 30, one end of which carries a bearing of a cylinder (of the cylinder 25 for the arms 27 and 28 and respectively of the cylinder 26 for the arms 29 and 30)

  whose other end is articulated on one of the

  riots (19 a and 19 b for arms 27 and 28 and respectively

a and 20b for arms 29 and 30).

  To ensure correct guidance of the cylinders 25 and 26, the two carriages of the same cylinder are movable on two

  guide surfaces constituted by slides 19 or

  20 which are planned parallel to each other on the

  two vertical plates 17 and 18 In order to ensure parallel

  constant axis of the two cylinders 25 and 26 between them and the winding shafts 13, 14, 15, displacements of

  two trolleys of the same cylinder are synchronized mechanically

  By means of synchronization means connecting the two carriages These synchronization means consist, for example for the carriages 19 a and 19 b of the cylinder 25, of a connecting shaft 31 interposed transversely between the two vertical plates 17 and 18 to connect two housings 31a and 31b (only the housing 31a is shown in Figures 1 and 2) of the angle gear, mechanically connected by gears or equivalent to a corresponding screw (32 for the housing

  31 a) moving the carriage 19a (or 19b on the other side).

  The screw 32 generally constituted by a low-friction ball screw is parallel to the slideway 19 For the carriage 20a, there is shown in FIG. 1 the deflection box 33 mechanically connected to a displacement screw 33

parallel to the slide 20.

  The cylinders 25 and 26 are biased by their corresponding pivoting arms 27, 28 and 29, 30 to apply respectively to the spool 5 and to the cylinder 25, since the pivoting arms tend to rotate in the direction of the needle pins. a watch under the action of means of recall or

  which can be springs in order to obtain

  nir a substantially constant booster or biasing torque on the pivoting arms 27 to 30 each articulated on their carriage, the return means of each arm shown

  in Figure 3 are constituted by a fluid cylinder, particularly

  pneumatic cylinder 34 or 35 formed of a piston movable in a cylinder between extreme stop positions and

  integral with a piston rod 36, 37 exiting to the outside.

  In the embodiment shown in FIG. 3, each jack is hinged at one end of its cylindrical body, for example 35 a for the jack 35, to the carriage that carries it (carriage 20 a) while its piston rod 36 or 37 is articulated by a fork and a hinge pin (for the cylinder 35 at 37a to an extension 38 of the arm 30) It is understood that the piston and the piston rod can make only a limited stroke by the funds of the cylinder of the cylinder so that when the first and / or the second cylinder

  stop (s) being in contact with a support cylinder (bobbin

  no 5 or first cylinder), it comes to the stop position without

  contact, held in position by its piston.

  A second set of cylinders 24a serving as a feed and cutting cylinder train of the film strip along an S-shaped path is provided upstream of the application roll train 24 and consists of three cylinders substantially superimposed and at a distance from one another in the operating position as shown in FIG. 1 The best spacing between the cylinders has been found to be that for which the length of free band

  was less than a quarter of the width of the film and, preferably

  The feed roll train comprises a third transfer cylinder 39 to the second cylinder 26, with a smooth surface made of black anodized aluminum, for example, in order to obtain better adhesion to the film strip. The third cylinder 39 is mounted loosely on two end bearings each of which is carried by the respective carriage 21a and 21b mobile on the slide 21 The film strip 2 is wound on a portion of the third cylinder 39 in the same direction than on the

second cylinder 26.

  The third cylinder 39 is preceded upstream of the film strip 2 of a fourth cylinder 40 of tension of the film strip during the cutting of its banks. The fourth cylinder 40 can also be used to measure the mechanical tension of the film by means of tensile force measuring cells arranged in its bearings and emitting a signal to a traction control module and mounted idly on two end bearings each of which is carried by a respective carriage 22a and 22b mobile on the slide 22 the film strip 2 is wound on the fourth cylinder 40

  in the opposite direction to that of the third and second

  39 and 26 and in the same direction as the first cylinder 25.

  The fourth cylinder 40 is preceded, upstream of

  the film strip 2, of a fifth cylinder 41 of stabilizing

  The fifth cylinder 41 is idly mounted on two end bearings each of which is carried by the respective carriage 23a and 23b movable on the slide 23. The film strip 2 is wound on the

  fifth cylinder 41 in the same direction as on the cylinders

  26 and 39, at the outlet of a feed cylinder 41a, of greater diameter than the five cylinders used to

  treat the strip 2 before it is wound on the reel 5.

  The two carriages of each of the cylinders 39, 40, 41 of the feed roll train are movable on parallel runners in synchronized displacements, as for the two application rollers 25 and 26. The mechanical synchronization means of the two feed carriages a cylinder are constituted, as described for the cylinder 25, a connecting connecting shaft (see the connecting shafts 42, 43, 44 respectively corresponding to the cylinders 39, 40 and 41) two return boxes each mounted on a plate vertical difference 17 or 18, the return boxes being

  connected by a screw to the corresponding trolleys

  1 and 3, the deflection housings 42a, 43a, 44a are mounted on the vertical plate 17 and respectively corresponding to the connecting shafts 42, 43 and 44 In order to allow the starting position to be adjusted individually. a trolley, the connecting shafts 42 to 44, as well as the

  connecting shafts corresponding to the first two cylinders

  25 and 26, are provided with a mechanical means of interruption of the synchronization, consisting for example of a sleeve to

  double thread connecting two parts of the connecting shaft.

  FIGS. 1 and 3 show the sleeves 45, 46, 47 and 48 respectively provided on the connecting shafts 31, 42, 43, 44. The sleeve can be rotated with only one of the parts of the connection shaft. , then locked again in rotation relative to the other part of the connecting shaft, so as to allow to move one of the carriages of a cylinder relative to the other carriage, and then after locking the sleeve on 1 'connecting shaft, to obtain after adjustment the synchronized movement of the two carriages

of a cylinder.

  It will be noted in FIG. 1 that the carriage 22 which bears one of the bearings of the fourth cylinder 40 is arranged

  This side of the reels

  riot 22a (and the carriage 22b not shown) is justified by the fact that the carriage 22a moves only weak

  values, mainly for adjustment purposes,

  the other trolleys, and also by the fact that it is

  necessary to fit transversely between the vertical plates

  shims 17 and 18, behind the fourth cylinder 40, a hollow beam 49 of fairly large section and intended to support one or more knives or cutting members 50 of the film strip 2 The movements of the carriages 19 a to 23 b can be controlled

  by electric motors but also by electric motors

  stepper jacks or two-speed pneumatic motors.

  After a positioning movement of a cylinder, the

  sliding carriages are held in place by the transmission

  irreversible connection between the electric motor and the screws or

  well by a brake mounted on the air motor. FIGS. 5 and 6 show the beam 49 and the

  section, respectively in rear view and in

  Cross section We see in Figure 5 the hollow beam

  49 which connects transversely the two vertical plates 17 and 18 and which carries two cutting carriages 51 and 52 which are capable of rolling on rollers 53 (shown in FIG. 6) at the top of the beam 49 under the action of a displacement and adjustment screw 54 which is parallel to the beam 49 and may consist of two coupled screws, one to the left and the other to the right. The screw 54 may to be trained in

  rotation manually by turning a crank handle

  55, which acts mechanically on the adjusting screw 54 by means of a deflection housing 56 As with the screws for driving the mobile carriages on the slides, a desynchronization sleeve 57 is provided on the adjusting screw 54 in order to allow one of the cutting carriages 51 or 52 to be moved independently of one another for adjustment purposes The cutting carts are normally adjusted to remove a falling band on both sides of the car.

  film strip and thus erect the sides of this strip.

  In Figure 6, there is shown the cutting carriage 52

  which carries an upper slide 58 on which is sus-

  able to move transversely to the longitudinal axis of the beam 49, by means of displacement means such as a lever 59, a knife holder 60 to bring the cutting edge 61 of the corresponding knife 50 into contact with the film 2 stretched between the fourth cylinder 40 and the fifth

  cylinder 41 It is thus possible to move the holder

  knife 60 away from the winding mechanisms to proceed with the removal and exchange of the knife 50 without disturbing the winding adjustment The knife carriage 60 can, moreover, be moved forward or backward by a table

  pneumatic short stroke to penetrate the neck

  50 in the film or remove it from film 2.

  Each knife carrier 51 or 52 carries, by the in-

  intermediate amounts of 62 and 63 which surround the section of the beam 49, a tube 64 for collecting a drop strip 65 at the edge of the film 2 (see also Figures 2 and 3) The strip 65 is formed immediately to the downstream of the knife 50 and passes on the fourth cylinder 40 to bend on an inlet nose 66 of the collector tube 64, this beak opening below

  the fourth cylinder 40 The collector tube 64 is normally

  In order to suck the chute strip 65 more easily, it is associated with a cutting knife 67 with longitudinal action which cuts the first drop band and allows it to be introduced into the tube 64. it is easily aspirated and transported to a storage and recycling circuit after passing through a fan

  hash, common to all collecting tubes and not

sented.

  FIG. 3 shows, on the rails of the vertical upright 17, adjustable stops (abutments 68 and 69 on the slide 20, abutments 70, 71 and 72 on the respective slides 21, 22, 23) intended to cooperate with an electric contact or contactor and / or

  electronic stopping drive motors of the move

  The two carriages of a cylinder are shown in FIG. 3. The drives 73 and 74 for driving the shafts 43 and 44 for connecting and driving the respective carriages 22a, 22b and 23a, respectively, are shown in FIG. b Drive motors (not shown) of these couplings

  are, for example, flanged on the gearboxes

  such as 43a and 44a in the example shown We also

  FIG. 3 shows a contactor 75 mounted on the carriage 23 a and intended to cooperate with the stop 72 to stop the driving motor of the carriages 23a and 23b of horizontal displacement of the fifth cylinder 41 By adjusting the position of the stops 68 to 72 on the slides or on the vertical plates, we can fix the position of a point

  automatic stop of the carriages of a cylinder.

  We will now describe the operation of the

  1, which represents the device in the service position, that is to say the winding position, in FIG. 4 which represents the device in FIG.

  winding start position and in FIGS. 7 and 8 which re-

  present the same device, respectively in the position of

  automatic change from one reel to another and finally from

  Automatic take-up of the winding on a new collector tube.

  In the winding start position shown in FIG.

  4, the trolleys 19a and 19b of the first cylinder 25 are moved by the drive motors in rotation of the screws 32, to a retracted position for which the first cylinder 25 is no longer in contact with the second cylinder 26 and with the outer surface of the coil collecting tube 6, the arm 11 has rotated relative to its position in Figure 1 A wide passage 76 has thus opened between the

  first cylinder and the second cylinder 26 whose

  20a and 20b remained in position The piston of the ram then came into abutment and the rotation of the pivoting arms

  29 and 30 stopped to immobilize the second cylinder.

  26 in the position shown in Figure 4 The carriages 21a and 21b and 23a and 23b respectively of the third and fifth cylinders 39 and 41 are advanced by their

  drive motors to occupy the position

  felt in Figure 4 and to extend the passage 76 upwards. A rigid guide film 78 movable in the vertical direction, as shown in Figure 4 and which is normally moved back in the winding position, is then lowered into the position shown in Figure 4 for which its release end is placed in the vicinity of the outer rear surface of a collector tube 6 previously mounted

  on the arm 11 The passage 76 formed by the recoil of the cylinder

  25 and the advance of the cylinders 39 and 41 allows the tube

  guide or winding 78 to pass without difficulty The proxi-

  Preferably, the tube 78 with respect to the collector tube 6 or a partially coiled film surface is preferably detected by proximity switch means which stops its downward movement. The winding tube 78

  can thus approach in the immediate vicinity of the collec-

  The device is then placed in a position o

  the actual winding can begin.

  The end 77 of the film strip 2 is then blown through the winding tube 78 by a blowing tube 79

  and the end 77 is grasped by the collector tube 6,

  Electrified lathing where applicable Adhesion and attraction

  end 77 of the film strip 2 on the collector tube

  6 may be improved by blowing air on the end of the strip by a blowing tube 79 and projections of water or other liquid using means not shown located near the collecting tube The fine droplets 77 thus formed come to collect on the surface of the film 2 and interpose as an adhesive between the collector tube 6 and the film 2 or between two layers

superimposed film 2.

  As soon as the end 77 of the film 2 is pressed onto the collector tube 6 to be wound, the rigid guide 78 is removed,

  the film 2 is placed on the feed cylinder of large diameter.

  41a and the first, third and fifth cylinders 25, 39 and 41 are brought back by their carriages 19, 21, 23 bearing support in the position shown in Figure 1, or rather in Figure 8, because the collector tube 6 does not yet carry many layers of film, except for the starting layer and the pivoting arms 27 to 30 are in the lower position, as shown in FIG. 8. If the film is to be split or placed on the net on its banks, the slicing knives are advanced, if necessary, after the

  beginning of the winding of the film 2 on the collector tube 6.

  The film 2 is then coiled by winding on the collector tube 6 The scroll speed of the film can reach 2 to 5 meters per second The banks of the film strip 2 are cut to the net by the two edge knives 50 and the falls of 65 are discharged into the collector tube 64 and, after being cut by the knife 67, are sucked to the aforementioned common chopper due to the straightness of the bank cut and the position of the first cylinder 25 which is surrounded by the film 2 over 1800 and which plate it on the previously wound layer without air interposition, we obtain a coil 5 o the successive layers of film does not

  can not be distinguished by eye on the slice, that is

  ie on the lateral side of the coil 5 which then presents

  a great regularity of winding, unlike the systems

  used until now which, to obtain this result,

  require an additional process step.

  When the coil 5 reaches its maximum diameter, it is necessary to automatically switch to winding on a

  another collector tube 6, previously mounted on the arm 10.

  For this, the set of carriages carrying the application cylinders 25 and 26 moves away from the spool 5 and the support shaft 9 has arms 10 to 12 to all come to a remote position on their slide, shown in Figure 7, so that all the cylinders are housed between the two vertical plates 17 and 18, the feed rollers 39, 40, 41 remaining in place The assembly 9 of the arms 10, 11, 12 can then rotate to bring the completed coil 5 into its future unloading position and the collector tube 6, previously mounted on the arm 6, in the position shown in Figure 7 In this position of Figure 7, the collector tube 6 empty comes to rest on the film 2 stretched between the completed coil 5 and the second cylinder 26 set back The first

* Cylinder 25 is no longer in contact with the film strip 2.

  The application cylinders 25 and 26 are then advanced into the position shown in FIG. 8, in order to firmly apply the film 2 to the collection tube 6. An envelope cylinder 16 carried by the arch 16 and which can be see the lateral end in the figures, is advanced by the hoop 16 in the position shown in Figure 8 by rotation of an actuating support 80 in the form of a cam and adequate guidance of its displacement by means not

  The film 2 is then applied to the collector tube

  6 vacuum about 300 arc of the surface thereof and adhere firmly to the surface of the tube 6 A knife

  transverse 82 provided at the end 81 of the arch 16 sec-

  transversely the film strip 2 and it is possible to wind, for example manually, the tail end of the film 2 of the coil 5 completed on the coil 5 which will be deposited while the winding continues on the new collector tube The envelope system of the hoop 16 is then retracted by rotation of the support 80 while the coil 5 continues to be formed by winding on the new

collector tube 6.

  It should be noted that it is not necessary to proceed to the removal of the knives 50 when going from the winding of a coil 5 to another because the film 2 is effectively kept under tension during the whole operation of change of Coil The duration of the coil change is very short thanks to the use of a software programmable logic control unit which determines the control and displacement sequences of all the elements of the device, a certain

  number of intrinsic safety devices ensuring that

  such an operation can not take place until all the

  in the correct position, while the tension of the film is continuously monitored and controlled. Instead of using only two knives

  shores in order to obtain perfectly clean rolls of film.

  In addition, it would be possible to add at least one central cutting or slitting system to produce, for example, two

  film reels during winding.

  Of course, the present invention is not limited to the embodiments described and shown but it is capable of numerous variants accessible to the man of

  art without departing from the spirit of the invention.

Claims (25)

  1. A device for winding a web of material film onto a collector pipe rotated by a spindle and on which the film web is wound to form a cylindrical spool-using a train of cylinders free-running applicator and formed of first and second cylinders parallel to the collector tube, the first of said cylinders, partially surrounded in service by the film strip, being tangent to the second cylinder, by clamping the filmstrip on it, and to the outer surface of the coil on which it applies the film, characterized in that, in the winding position, the first cylinder and the second cylinder (25, 26) are respectively applied to the outer surface of the coil. the coil (5) and on the first cylinder (25) by separate return means (34, 35) located on either side of each cylinder and each acting respectively on a pivoting arm (27, 28, 29, 30). ) with one end a bearing of the cylinder and whose other end is hinged to a movable carriage (19a, 20a) on a guide surface (19, 20) and in that the guide surfaces of a cylinder are   parallel to each other and the movements of the two   rots (19a, 19b, 20a, 20b) of a cylinder are synchronized by mechanical synchronization means (31, 31a, 32) connecting the two carts.   2. A winding device according to claim 1, characterized in that each of the return means (34, 35) is capable of acting on the corresponding pivoting arm (27, 28, 29, 30) to rotate it elastically up to at a position of extreme rotation, in the case where the first or the second cylinders (25, 26) are not subjected to the action of   respective reaction of the cylindrical coil (5) and the first first cylinder (25).   Winding device according to claim 1 or   2, characterized in that the said return means are con-   arranged by a pneumatic jack (34, 35) with a piston movable in a cylinder and whose piston rod (36, 37) is articulated to an extension (38) of the pivoting arm (27, 28, 29, 30) while the end of the pneumatic cylinder, opposite to   the piston rod is articulated on the corresponding carriage. (19a, 19b, 20a, 20b).   4. Winding device according to any one of   Claims 1 to 3, characterized in that in the position   start or initialization of the winding, the carriages (19 a,   19 b) of the first cylinder (25) are susceptible to   cer away from the cylindrical coil (5) to a retracted position for which the first cylinder (25) is no longer in contact with the second cylinder (26) and with the outer surface of the coil (5) so as to arrange between it and the second cylinder a passage (76) allowing   introducing the end (77) of the winding film (2).   5. Winding device according to claim 4, characterized in that the carriages (20a, 20b) of the second cylinder (26) are capable of being held in position while their pivoting arms (29, 30) are brought to 'at   a stop position by the return means (35).   6. Winding device according to any one of   Claims 1 to 5, characterized in that, in the case where   it comprises several collecting tubes (5) each arranged   on one of the arms (10, 11, 12) of a coil coil support   (3), the carriages (19a, 19b, 20a, 20b) of the first and second cylinders (25, 26) are engageable on their guide surfaces (19, 20) in a remote withdrawal position. of the cylindrical spool (5) to allow rotation of the loaded spool support arms (10, 11, 12)   their coil (5) or a collector tube (6).   7. Winding device according to any one of   Claims 1 to 6, characterized in that it comprises   applied to the filmstrip upstream of said cylinder train.   of application (24), a train (24 a) of feed cylinders   tion and cutting of the film strip.   Winding device according to claim 7,   characterized in that the train of feed cylinders   24 a) comprises a third transfer cylinder (39) to the second cylinder (26), a fourth cylinder (40) for tensioning the film web (2) during cutting and a fifth stabilizing cylinder (41). and holding the film web during the cutting, said third, fourth and fifth cylinders being placed parallel, in the operating position, substantially superimposed and spaced from each other, and the film web (2) being wound, before to reach the second cylinder, partially on the   feeding cylinders in opposite directions of a cylinder to the other.   9. Winding device according to claim 8, characterized in that at least one knife (50) is applied to the film web stretched between the fourth (40) and the fifth (41) cylinders.   Winding device according to claim 8 or   9, characterized in that the end bearings of the three   s, fourth and fifth cylinders are each carried by a carriage (21a, 21b; 22a, 22b; 23a, 23b) movable on a   guide surface (20, 21, 22) disposed substantially   horizontally lateral to the cylindrical coil   film drique (5), the two carriages of a cylinder being synchronized by mechanical synchronization means (42, 43, 44) and capable of moving, at least for the third and fifth cylinders, from an advanced position towards the from the film reel (2) to a position withdrawal.   11 winding device according to claim 10,   characterized in that in a position of beginning or beginning   winding, the trolleys (21a, 21b, 23a, 23b) of the   third (39) and fifth (41) cylinders are   movable on their guide surfaces by moving closer to the cylindrical coil to an advanced position which accommodates between these two cylinders (39, 41), a   part, and the fourth cylinder (40), on the other hand, a   ge (76) for introducing the end (77) of the film winding (2).   Winding device according to Claim 10 or 11, characterized in that the five cylinders (25, 26, 39, 40, 41) have substantially the same length, in that the guide surfaces (19, 20, 21, 22 , 23) carriages of these five cylinders are carried by two parallel vertical plates (17, 18) spaced substantially from the width of the cylinders and which are substantially horizontal and parallel between them.   Winding device according to Claim 12,   characterized in that the two parallel vertical plates   the (17,18) carry a beam (49) arranged parallel to the cylinders at the fourth cylinder (40) and the side opposite to the cylindrical film reel (5) with respect to the fourth cylinder (40), in that the beam (49) carries at its upper part a knife (50) mounted on a support   mobile (52, 60) whose position is adjustable on the   (49) in the direction parallel to the axis of the beam and in the direction perpendicular to the axis of the beam and in that the knife (50) is applied to the film (2) stretched between the fourth (40) ) and the fifth (41) cylinder, neighborhood of the latter.   Winding device according to claim 13, characterized in that the beam (49) carries at least one collection tube (64) of a separate film drop strip (65).   by said knife (50) of the film strip (2).   Winding device according to claim 14, characterized in that the collection tube (64) is carried substantially horizontally below the beam (49) and opens onto the film strip by a spout (66). 'opening   below the fourth cylinder (40).   16. A winding device according to claim 14 or, characterized in that the collection tube (64) comprises means for severing (67) the drop band of film (65).   17. Winding device according to any one of   Claims 1 to 16, characterized in that the positions   extremes of the carriages of the first and second cylinders (25, 26) on their guide surfaces (19, 20) are manually adjustable by displacement of a contact stop (68, 69).   electrical or electronic control of a drive motor   synchronized movement of the two carriages of a cylinder.   18. Winding device according to one of the claims   10 to 16, characterized in that the extreme positions   trolleys of the third (39), fourth (40) and fifth   me (41) cylinders on their guide surfaces (21, 22, 23) are manually adjustable by displacement on the corresponding plate (17 or 18) of a stop (70, 71, 72) contact (75) electrical or electronic of controlling a drive motor for the synchronized movement of the two carts of a cylinder.   19 Winding device according to one of the claims   17 or 18, characterized in that synchronization means   mechanical assembly of the two carriages of a cylinder comprise mechanical means (45, 46, 47, 48) for interrupting the synchronization, able to allow the positioning adjustment of one of said carriages independently of the other which is synchronized to it.   20. Winding device according to one of the claims   1 to 19, characterized in that the first cylinder (25)   is covered with an elastomeric material.   21 Apparatus according to any one of the claims   1 to 20, characterized in that the second cylinder (26) is a solid cylinder with high rigidity and covered with a chromium layer.   22. Winding device according to any one of   Claims 8 to 21, characterized in that the third,   fourth and fifth cylinders (39) are aluminum   covered with a black anodized layer.   23. A method of winding a strip of material film on a collector tube rotated by a spindle and on which the film strip is wound to form a   cylindrical coil by means of a cylinder train of appli-   cation formed of a first and a second cylinder pressing the film strip partially wound on the first cylinder, respectively on the outer surface of the coil and on the first cylinder, characterized in that it is mounted each of the bearings of end of the first and second cylinders on a pivoting arm carried by a carriage movable on a guide surface by synchronizing the displacements on their guide surface of the two carriages of the same cylinder, in that each pivoting arm is urged in   rotation by separate return means tending to re-   respectively pushing the first cylinder on the film reel and the second cylinder on the first cylinder, in that, for the beginning or the initialization of the winding, the two trolleys of the first cylinder are moved on their guiding surfaces to move them away from the film reel and opening between the first and second cylinders a passage in which the end of the film to be wound is introduced, and   before winding begins, the   riots at their starting position to squeeze the filmstrip   on the spool and on the first cylinder.   24. A winding method according to claim 23, characterized in that, when several collecting tubes are each arranged on one of the arms of a rotating coil support, before the rotation of the coil support, the carriages of the first one are moved. and the second cylinders on their guiding surfaces to move them away from the film reel and allow the free passage of a support arm loaded with a   collector tube or a film reel.   25. Winding method according to claim 24 or in which is applied to the film strip, in   opposite directions and upstream of the cylinder train   of application, a train of supply cylinders,   characterized in that each of the   mite of at least one feed cylinder out of two alternately on a carriage movable on a guide surface by mechanically synchronizing the movements of the two carriages of a cylinder, is moved on their guide surfaces the carriages of a cylinder alternating between two to bring them closer to the film reel and open, between the alternating cylinders, a passage in which the end of the film to be wound is introduced and in that after the beginning of the winding, we recall the carriages to their starting position for applying the film strip in contact with the feed rolls.