EP1306335B1 - Umwickelmaschine für Plasikfolie oder ähnliches Material - Google Patents

Umwickelmaschine für Plasikfolie oder ähnliches Material Download PDF

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Publication number
EP1306335B1
EP1306335B1 EP01830641A EP01830641A EP1306335B1 EP 1306335 B1 EP1306335 B1 EP 1306335B1 EP 01830641 A EP01830641 A EP 01830641A EP 01830641 A EP01830641 A EP 01830641A EP 1306335 B1 EP1306335 B1 EP 1306335B1
Authority
EP
European Patent Office
Prior art keywords
cores
machine according
core
loader
revolver unit
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.)
Expired - Lifetime
Application number
EP01830641A
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English (en)
French (fr)
Other versions
EP1306335A1 (de
Inventor
Marco Franceschini
Simone Perotti
Giuseppe Acciari
Marco Capitani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
A Celli Nonwovens SpA
Original Assignee
A Celli Nonwovens SpA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by A Celli Nonwovens SpA filed Critical A Celli Nonwovens SpA
Priority to EP01830641A priority Critical patent/EP1306335B1/de
Priority to AT01830641T priority patent/ATE266593T1/de
Priority to DE60103283T priority patent/DE60103283D1/de
Priority to CA002407186A priority patent/CA2407186A1/en
Priority to US10/267,536 priority patent/US20030089814A1/en
Publication of EP1306335A1 publication Critical patent/EP1306335A1/de
Application granted granted Critical
Publication of EP1306335B1 publication Critical patent/EP1306335B1/de
Anticipated expiration legal-status Critical
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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
    • B65H19/2207—Changing the web roll in winding mechanisms or in connection with winding operations the web roll being driven by a winding mechanism of the centre or core drive type
    • B65H19/2215—Turret-type with two roll supports
    • 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
    • B65H2301/417—Handling or changing web rolls
    • B65H2301/418—Changing web roll
    • B65H2301/4181—Core or mandrel supply
    • B65H2301/41812—Core or mandrel supply by conveyor belt or chain running in closed loop
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2408/00—Specific machines
    • B65H2408/20—Specific machines for handling web(s)
    • B65H2408/23—Winding machines
    • B65H2408/231—Turret winders
    • B65H2408/2315—Turret winders specified by number of arms
    • B65H2408/23152—Turret winders specified by number of arms with two arms

Definitions

  • the present invention relates to a re-reeling machine for the production of rolls of wound web-like material, and in particular (but not exclusively), rolls of plastic material, for example extensible plastic film.
  • the present invention relates to a re-reeling machine of the type comprising a feed assembly for feeding tubular winding cores and a re-reeling assembly with a revolver unit on which the tubular winding cores are set for winding thereon pre-determined amounts of web-like material and for forming respective rolls of wound web-like material, said revolver unit rotating about an axis of rotation and being provided with at least two supports for said tubular cores, which are set in two respective angular positions with respect to said axis of rotation.
  • the film coming from the extruder is wound in large rolls, also referred to as "jumbo rolls” or parent reels, from which it is then unreeled to be re-reeled on rolls or reels of a smaller diameter.
  • re-reeling machines are used which rewind the plastic film, delivered by an unreeler, on tubular winding cores, typically made of cardboard, to form rolls of the desired final diameter and containing the required amount of film.
  • feed of the film is interrupted when a roll is completed, in order to enable cutting of the film, unloading of the roll, insertion of a new winding core, and anchoring of the leading edge of the film to the new core, which is then set in rotation.
  • the cores are normally driven in rotation by a so-called central control or spindle control, namely, by applying the driving torque to the tubular winding core.
  • a re-reeling machine according to the preamble of claim 1 is disclosed in US-A-5,909,856.
  • An object of the present invention is to provide a re-reeling machine that enables one or more of the drawbacks of machines according to the prior art to be overcome.
  • a purpose of the present invention is to provide a re-reeling machine that enables the changeover operations, i.e., the operations for replacing the completed roll with a new winding core in order to start winding of a new roll, in a fast and efficient way and without reducing the rate of feed of the web-like material.
  • a re-reeling machine for re-reeling web-like material, in particular plastic film, of the type referred to above, characterized in that the feed assembly for feeding the tubular cores comprises a path for dispensing tubular cores to a core loader, the said core loader being provided with a movement of approach to the revolver unit and a movement of following of the motion of the revolver unit, for transferring the tubular cores from the loader to the revolver unit.
  • a core-launching device for example comprising a motor-driven rotating member, may be set on the core loader.
  • the loader has at least one resting cradle for the cores that are to be loaded into said revolver unit, said resting cradle being mobile so as to be removed from the core once the latter is engaged by the respective support on the revolver unit.
  • the core-launching device can cause angular acceleration of the core, which is already engaged by the supporting means on the revolver unit, without the movement of the core being hindered by friction against the resting cradle.
  • the loader may be provided with a dual translation movement, namely both in the horizontal direction and in the vertical direction, to approach the revolver unit.
  • the said dual movement may be obtained in a simple way with two linear actuators, for instance two cylinder-piston actuators.
  • actuators for example stepper motors
  • this solution presents the drawback of a considerable cost and a certain difficulty in programming the movements.
  • the loader and the revolver unit comprise mechanical members for mutual engagement, so as to co-ordinate the movement of the revolver unit with the movement of the loader during the step of transfer of the core from the loader to the revolver unit and of launching of the cores.
  • the loader is temporarily mechanically constrained to the revolver unit, which controls movements thereof. This may be achieved, for instance, with a bidirectional constraint, such as a hook or the like.
  • the constraint is a supporting constraint, and the loader is kept in contact with the revolver unit by means of the thrust exerted by the same actuator which controls movement of approach of the loader to the revolver unit.
  • a bracket and a first idler wheel on the loader and a second idler wheel on said revolver unit, in the position of mutual engagement the second wheel resting on said bracket and on said first wheel so as to exert a thrust on the loader, said loader being in turn pushed against the revolver unit.
  • the loader may be associated to core-centring means.
  • a centring system may be provided comprising at least one pair of side walls between which the said cores are made to pass, the distance between said side walls being approximately equal to or slightly greater than the maximum axial length of the cores.
  • the centring system may advantageously comprise also a pair of actuators for centring the winding cores. The pair of actuators may also be used as an alternative to the side walls.
  • a core-dropping path along the path of delivery to the loader there may be provided a core-dropping path and an oscillating dispenser which enables passage of individual cores from said core-dropping path to the loader.
  • the said dispenser may be interchangeable, or else may be provided with seats of different sizes; in this way it is possible to handle cores of different radial dimensions simply by modifying the angular position of the dispenser.
  • the loader may comprise a horizontal cross member which can slide along vertical guides and is associated to a first actuator or system of actuators that controls movement of translation along said vertical guides.
  • Supported on said cross member is a carriage, horizontally mobile in a direction orthogonal to said cross member, to which a second actuator that controls horizontal movement of the carriage with respect to the cross member is associated.
  • Supported on the carriage is the resting cradle for the cores.
  • the second actuator may be used to push the loader against the constraint for resting on the revolver unit during the core transfer and launching step.
  • the core-resting cradle may be carried by a bracket (either a single one or a double one) hinged to the carriage, an actuator being provided for controlling the oscillation of said bracket with respect to the carriage.
  • the revolver unit may comprise, for each core support, a winding roller, which turns at a peripheral speed that basically corresponds to the rate of feed of the web-like material, the tubular core or else the roll being formed on said core being supported idle by the corresponding support and being pressed by the latter against the cylindrical surface of said winding roller in order to be kept rotating.
  • winding of the rolls is of a peripheral type, instead of being of a central type as in traditional re-reeling machines provided with revolver units, and in particular in re-reeling machines for winding plastic film.
  • the core supports provided on the revolver unit, comprise a pair of oscillating arms which carry respective heads for frontal engagement of the cores, the oscillating arms being displaced from a position where the core is picked up from the loader to a position where the core is brought up to the respective winding roller in order to obtain transmission of motion by friction.
  • the revolver unit may be provided with at least one pair of guide rollers over which the web-like material is run, said guide rollers and winding rollers being set in alternated positions about the axis of rotation of the revolver unit.
  • the guide rollers may be motor-driven, and preferably a common motor-power drive will be used for controlling rotation of all the rollers carried by the revolver unit.
  • the aforesaid characteristics of the revolver unit may be adopted also in a re-reeling machine having a different type of core loader.
  • the revolver unit there may be supported, for each support of the winding cores, an assembly for cutting the web-like material and applying the leading edge of the web-like material on the winding core.
  • each of said assemblies for cutting the web-like material and applying the leading edge of the web-like material on the winding core comprises a pair of guide members over which the web-like material is run, that are parallel to one another and are set at a distance apart, and between which a cutting member is set.
  • a blower member for pushing the free edge of the web-like material, generated by the cutting member, to wrap around the winding core.
  • the pair of guide members and the cutting member set between them may be mobile from a position set back within the path of the web-like material around the revolver unit, to an extracted position, in which the guide members deviate the web-like material around a new core on which winding is to be started.
  • the guide members and cutting member can be supported on respective oscillating sides, which are hinged so that they can turn about the axis of the respective winding roller.
  • the guide members may be cylinders or rollers, or else they may be made up of bars on which idle sleeves can be supported for take-up of the web-like material.
  • the re-reeling machine can be configured for handling the web-like material coming from a single jumbo roll, and hence for forming a single roll at a time.
  • a double-acting machine i.e., one that is able to receive two webs of material that wind in parallel on two cores axially aligned with one another.
  • the core-feed system will be double in order to feed two cores simultaneously to the re-reeling assembly.
  • the re-reeling machine may be advantageously equipped with an assembly for discharging the rolls from the revolver unit.
  • the discharging assembly may comprise, for instance, a mobile slide provided with a cradle for resting the finished rolls, the mobile slide being displaceable in such a way as to be brought close to the revolver unit and removed from the latter towards a roll-discharging area.
  • the slide may moreover be provided with a braking roller to brake the roll when the latter is still supported by the revolver unit, in such a way that it can be released on the cradle of the slide after it has stopped turning about its own axis.
  • the invention is described in what follows in an embodiment which envisages a double machine, i.e., a machine that is able to handle two webs of material each of which is unwound from a respective jumbo roll, to form two rolls of wound material in parallel.
  • Fig. 1 illustrates the entire line for unreeling and re-reeling the web-like material.
  • the reference number 1 designates the unreeler
  • 3 designates the re-reeling machine
  • 5 an assembly for feeding the tubular winding cores.
  • Two axially aligned parent reels or jumbo rolls are set in the unreeler for unreeling two webs of material towards the re-reeling assembly 3, where pairs of rolls of web-like material of a diameter smaller than that of the jumbo rolls are formed in sequence, by being wound on cores supplied by the feed assembly 5.
  • the plant is modular and can be equipped with further assemblies, set between the unreeler and the re-reeling assembly, or even between the two components of the re-reeling assembly. In this way, dinking assemblies or other assemblies may be provided along the path of the web-like material.
  • the configuration of the unreeler 1 is illustrated in detail in Figs. 2 and 3, where this component of the line is shown isolated in two different perspective views.
  • the unreeler 1 has two sides 7 joined together by cross members 9.
  • the two sides 7 support two delivery rollers 11, 13, over which two unwinding belts are run.
  • the bottom delivery roller 11 is motor-driven in the way described in what follows, and draws along the belts 15, and consequently the top roller 13.
  • the web-like material N is delivered, by the parent reels, to be wound into rolls of a smaller diameter by means of the re-reeling assembly 3.
  • the parent reels BM are each held by a pair of idle centres, designated by 17, 19, and carried by respective arms 21, 23 connected together by torsion bars 25.
  • a cylinder-piston actuator 27 (Fig. 3) acts on the arm ensemble to move the arms 21, 23 alternatively into a loading position or into an unreeling position. In the latter position, the arms press the parent reels BM, which are carried by the respective centres 17, 19, against the belts 15. Movement of the latter brings about unreeling of the web-like material.
  • Above the delivery roller 13 is a feed roller 29 around which the web-like material unwound from the parent reels BM is run.
  • Fig.1 On the opposite side of the unreeler with respect to the arms 21, 23 for supporting the parent reels BM, there are two pairs of idle guide rollers, one of which is designated by 31 and the other by 33, around which the web-like material coming from the parent reels BM is run.
  • the path of the web-like material is illustrated in Fig.1 and designated by N.
  • One of the rollers of each pair has an axis which can be inclined by means of an actuator (not illustrated) and a sensor for detecting the edge position of the web-like material running over the guide roller. By means of the sensor it is possible to check that the web-like material always remains properly guided. Any swerving of the web-like material is corrected by modifying the inclination of the axis of the inclinable roller.
  • the reference number 35 designates the main motor, which transmits motion to the members of the unreeler by means of a belt 37 run over a series of pulleys, which are shown in Fig. 2.
  • the ones designated by 39 and 41 are the pulleys set respectively on the shaft of the feed roller 29 and on the shaft of the bottom delivery roller 11.
  • the re-reeling assembly 3 is illustrated in detail in Figs. 4, 4A and 4B.
  • Set at intake to the re-reeling assembly is a hump roller 51 for stretching the web-like material N in the transverse direction and eliminating any longitudinal creases.
  • Downstream of the hump roller is a guide roller 55 which deflects the path of the web-like material N towards a revolver unit 57 supported so that it can turn about a horizontal axis A, which develops in the direction of the width of the web-like material N, i.e., in a direction orthogonal to the plane of Figs. 4 and 4A.
  • the two winding rollers 59, 61 are set with their own axes in a plane in which the axis A of rotation of the revolver unit lies.
  • the axes of the guide rollers 63, 65 are set in a plane in which the axis A lies. The latter rollers are at a distance from the axis A greater than that of the winding rollers 59, 61.
  • All the winding rollers 59, 61 and guide rollers 63, 65 are motor-driven by a single motor which also drives the guide roller 55.
  • the corresponding transmissions are set on the outside of the sides 67 and 69, as may be seen in Figs. 4 and 4A.
  • Fig. 5 is a perspective view of the motor and drives isolated from the other members of the re-reeling assembly 3.
  • the reference number 71 designates the motor which transmits, by means of a belt 73 and a pulley 75, motion to a main shaft 77. From the latter, by means of a belt 79, the motion is transmitted to the guide roller 55, at the corresponding end of which a pulley 81 is fitted.
  • the peripheral speed of the rollers is approximately equal to the rate of feed of the web-like material N.
  • Fitted on the shaft with axis A of the revolver unit is a chain wheel 93 over which a chain 95 is run, the said chain being driven by a motor reducer 97.
  • the motor reducer is responsible for the rotational movement of the revolver unit 57 about its own axis, for the purposes which will be clarified in what follows. This rotation takes place at a much lower speed than the rate of feed of the web-like material.
  • each of the winding rollers 59, 61 respective supports for winding rolls.
  • respective supports for winding rolls As may be seen in particular in the cross section of Fig. 4B, associated to each winding roller 59, 61 are two pairs of heads 101, 102.
  • Each pair of heads 101, 102 has the function of engaging a respective tubular winding core; in this way, alongside each winding roller 59, 61 there are two axially aligned winding cores.
  • Each head is carried by a respective oscillating arm, designated by 103 and pivoted about an axis 105 parallel to the axis A of the revolver unit 57.
  • the heads can move in a direction parallel to the axis A of the revolver unit, so that they can engage a respective winding core and disengage therefrom.
  • Each pair of heads 101, 102 and the corresponding oscillating arms 103 form a support for a winding core and for the roll that forms thereon during feed of the web-like material.
  • An actuator (not illustrated) can take the pairs of oscillating arms with the corresponding heads from the position shown in Fig. 4 to a position whereby the tubular winding core engaged by the heads comes to press against the surface of the respective winding roller 59, 61. This movement is shown in particular in Figs. 7, 8 and 9. In Fig. 7, the head 101 is shown in the position where it is at some distance away from the respective winding roller 57, whilst in Figs. 8 and 9 it is brought up to the winding roller.
  • the core C supported by the heads, or the outer surface of the roll being formed thereon is pressed against the winding roller 59 for receiving, by friction, the drawing torque that keeps the core and the roll being formed thereon rotating, thus enabling re-reeling to be carried out.
  • each of the two winding rollers 59, 61 Pivoted around the shafts of each of the two winding rollers 59, 61 are two sides 111 (one of which is shown in Figs. 4, 4A, 7, 8, and 9, the other being identical and being set at the opposite end of the respective roller).
  • Each of the two sides 111 supports two bars 113, 115 on each of which idle sleeves 117, 119 are set, over which, in the roll-changeover step, web-like material is run, as will be clarified hereinafter.
  • the two sides 111, and consequently the members supported thereby oscillate about the axis of the respective winding roller 59 or 61 by means of an actuator (not illustrated), which takes the sides 111 and the members supported thereby from the position of Fig. 7 to the position of Fig. 8 in order to carry out changeover of the winding cores, as will be clarified in what follows.
  • each pair of sides 111 is also a cutting member, designated as a whole by 121 (see in particular Figs. 7-9), which comprises a pair of oscillating arms, only one of which may be seen in the drawing and is designated by 123.
  • the oscillating arms are pivoted about an axis X (Figs. 8 and 9) ⁇ fixed with respect to the sides 111 ⁇ and carry a bar 125, which extends between the sides 111 and carries a cutting blade 127 heated by an electrical resistor 129 in contact therewith.
  • the bar 125 also carries, alongside the cutting blade 127, a series of compressed-air nozzles, designated by 133.
  • the oscillating arms are controlled by an actuator 131, which is also carried by one of the sides 111.
  • the actuator 131 causes the cutting blade 127 to assume two alternative positions with respect to the bars 115. One of these alternative positions is shown in Figs. 7 and 8 and the other in Fig. 9.
  • the movement controlled by the actuator 131 has the purpose of cutting the web-like material at the moment of change of the winding core, as will be clarified later.
  • the ensemble made up of the elements 111-133 forms a cutting assembly for cutting the web-like material and applying the leading edge of the web-like material on the new winding core.
  • each projecting arm 104 which is rigidly constrained to the revolver unit, carries an idler wheel 106 which has the function of creating a constraint between the revolver unit and the core loader during the step of replacement of the winding rolls, in the way that will be clarified hereinafter.
  • the two arms 104 and the respective wheels 106 protrude beyond the overall dimensions of the revolver unit 57, as may be seen in Fig. 6.
  • the re-reeling assembly 3 moreover comprises an assembly for discharging the finished rolls, which is designated as a whole by 135 and shown in detail in Figs. 16 and 17.
  • the discharging assembly 135 has a mobile slide 137 fixed to two tubular guide bars 139 which are guided by means of shaped rollers 141 (cf. Fig. 16) that are idly supported on shafts fixed to the load-bearing structure of the re-reeling assembly. Movement of the slide is controlled by a cylinder-piston actuator 143.
  • the slide can assume a retracted position (Figs. 4 and 4A) and a position where it is brought up to the revolver unit 57 for receiving a finished roll and removing it from the revolver unit, according to modalities which will be described in greater detail in what follows.
  • a braking roller 145 Carried on the slide 137 is a braking roller 145 with an electromechanical brake 147.
  • the braking roller 145 is in contact with the completed roll, which is still supported by the heads 101, 102 that engage the corresponding core.
  • the heads have been brought into a position at a distance from the respective winding roller 59 or 61, and hence the contact of the roll with the braking roller 145 will cause arrest of the inertia rotation of the roll itself.
  • the slide 137 also carries a cradle for resting the finished roll, or the two axially aligned finished rolls, when the latter are released from the heads 101, 102.
  • the cradle is designated by 151 for both of the rolls and is formed by respective pairs of lengths of open V-shaped section, designated by 151A.
  • Set between the two lengths of V-shaped section is a side wall 153, which can move vertically under the control of a cylinder-piston actuator 155. In the raised position illustrated in Figs. 16 and 17, the mobile side wall prevents accidental dropping of the roll that is positioned on the cradle, whereas, when it comes down it enables discharge of the roll from the cradle onto a discharge conveyor belt set underneath.
  • a pusher 159 operated by a cylinder-piston actuator 161.
  • the pusher 159 pushes the finished roll out of the respective cradle 151 and causes it to drop onto the conveyor belt 157.
  • the tubular cores are fed to the re-reeling assembly 3 by the feed assembly 5, which is shown in particular in Figs. 4 and 10 to 15.
  • This assembly comprises a double hopper 161 from which the tubular cores are picked up by a double conveyor belt 163 which takes them to a double chute 165.
  • the arrangement is double to make it possible to pick up and feed pairs of axially aligned tubular cores, which receive the web-like material delivered by the two parent reels BM unwound in parallel in the unreeling assembly 1.
  • a dropping channel or path 171 for dropping the cores Connected underneath the chute 165 is a dropping channel or path 171 for dropping the cores, within which an oscillating dispenser 173 is set, which is shown in detail in the enlarged cross section of Fig. 12.
  • the oscillating dispenser 173 oscillates about its own axis 173X under the control of a cylinder-piston actuator 175 (Fig. 10).
  • the oscillating dispenser 173 has two seats 173A and 173B of different sizes for receiving tubular cores C having different diameters.
  • Fig. 12 illustrates the tubular cores C respectively with the maximum diameter - designated by C1 - and the minimum diameter - designated by C2 - that can be handled by the machine. In the configuration represented in Fig.
  • the oscillating dispenser is positioned angularly in such a way as to handle the cores C1 of larger diameter.
  • the latter are picked up from the chute 165 and transferred into the dropping channel or path 171 by means of an oscillation, as indicated by the arrow f173, of the oscillating dispenser 173.
  • the device is to handle cores C2 of a smaller diameter, its angular position is modified by 180° to change round the positions of the two seats 173A and 173B.
  • the core C2 shown in Fig. 12 is therefore represented only in order to illustrate how the machine is able to handle tubular cores having even widely variable diameters.
  • the tubular core unloaded by the oscillating dispenser 173 comes down along the dropping path 171 until it reaches the position C1' (for the core C1) or C2' (for the core C2) on a core loader 181 illustrated in detail and isolated from the other elements of the assembly 5 in Figs. 13 to 15.
  • the core can be centred (when its size is considerably smaller than the distance between the sides 169 of the chute 165) by means of centring devices controlled by pairs of actuators 180 (Fig. 11) positioned at the bottom of the dropping channel 171.
  • the loader 181 comprises a horizontal cross member 183 which is fixed to guide bushings 185 that slide along vertical guide bars 187.
  • the movement in the vertical direction is supplied to the cross member 183 by a cylinder-piston actuation system 189 which controls the movement of vertical translation of the loader 181, as indicated by the double-headed arrow f181.
  • the actuation system 189 consists of two cylinder-piston actuators 189A, 189B set in series, the operation of which is explained in greater detail in what follows.
  • a carriage 195 Applied underneath the horizontal cross member 183 are two guide bushings 191, in which there slide bars 193 of a carriage 195, which carries the cradles for resting the cores that are to be inserted into the re-reeling assembly.
  • a cylinder-piston actuator 197 the cylinder of which is constrained to a bracket 199 fixed to the cross member 183, and the stem of which is constrained to the carriage 195, controls movement of the carriage 195 in the direction indicated by the double-headed arrow f195, the said direction being orthogonal to the cross member 183 and to the guide bars 187.
  • Hinged to the carriage 195 are two double L-shaped brackets, designated by 201, which oscillate with respect to the carriage 195 about an axis 201 A (see in particular Figs. 12 and 15) that is parallel to the cross member 181.
  • the oscillation of each double bracket 201 about the axis 201 A is controlled by a respective cylinder-piston actuator 203, the stem of which is constrained to a cross member 205 that joins the two parts of the double L-shaped bracket 201 together.
  • the double bracket 201 oscillates in the direction indicated by the arrow f201 in Figs. 14 and 15.
  • a pair of lengths of section 202 is constrained to the double bracket.
  • the lengths of section 202 constrained to each double bracket 201 form respective cradles for the tubular winding cores C.
  • each double bracket 201 Fixed to each double bracket 201 is an upright 207 which supports a further cylinder-piston actuator 209.
  • Each upright 207 and the corresponding actuator 209 thus oscillate rigidly together with the respective bracket 201 when the actuator 203 is operated.
  • the stem of each actuator 209 is constrained to a shaft 211 with interposition of a bearing that enables the shaft 211 to turn about its own axis and to be displaced at right angles to the axis itself as a result of the action of the actuator 209.
  • each shaft 211 Fitted on the shaft 211 are two friction wheels 215, which have the function, as will be described later, of imparting an angular acceleration on the winding core before this comes into contact with the web-like material that is to be wound thereon.
  • the rotation of each shaft 211, and hence of the friction wheels 215, is controlled by a motor 217 axially aligned with the shaft itself.
  • Each shaft 211 is supported by a pair of oscillating arms 213, which are pivoted to the double bracket 201 about the axis of the cross member 205.
  • the actuator 209 can thus cause an oscillation of the shaft 211 about the axis of the cross member 205.
  • the two positions of the shaft 211 are represented one in Figs. 13-15 and the other in Fig. 12. This oscillation makes it possible to bring the friction wheels 215 into a position in which they do not interfere with the dropping of the winding cores C along the path 171.
  • bracket 221 Mounted on the carriage 195, in an intermediate position between the two pairs of brackets 201, is a bracket 221, through which the cross-sectional plane of Fig. 15 passes.
  • An idler wheel 223 is supported idle on the bracket 221.
  • the bracket 221 and the idler wheel 223 are designed to co-operate with either one or the other of the idler wheels 106 (Figs. 8 and 9) of the revolver unit for creating a temporary constraint between the core loader and the revolver unit itself.
  • Fig. 4A shows the re-reeling assembly 3 in a step of completion of a pair of axially aligned rolls B.
  • the two rolls being completed, on which the web-like materials coming from the two parent reels BM are being wound, are supported by the two pairs of heads 101, 102, which are in the position closest to the unreeler 1 and closest to the discharge conveyor belt 157, i.e., at the bottom left in Fig. 4A.
  • the web-like material N coming from each of the two parent reels BM is run over the guide rollers 63, 65 and the winding roller 59.
  • the rolls are pressed by the corresponding supports against the winding roller 61, which furnishes the winding motion.
  • the changeover step starts, i.e., the step of replacement of the completed rolls with the new winding cores.
  • the changeover step for each core and for each finished roll, the following operations are to be carried out:
  • the loader 181 with the new cores is brought up to the revolver unit 57 until it reaches, with the core-supporting cradles, the position indicated by P1 in Fig. 18, by means of a combined horizontal and vertical movement (respectively controlled by the actuators 197 and 189A) of the carriage 195.
  • the revolver unit 57 is in an angular position whereby the heads 101, 102 associated to the winding roller 59 (temporarily inoperative) are aligned with the cores carried by the carriage of the loader to the position P1.
  • the heads can engage the cores themselves, which are thus withheld on the revolver unit 57 and no longer require the resting position provided by the cradles formed by the lengths of section 202.
  • the position of the carriage 195 of the core loader with respect to the revolver unit 57 is such that the idler wheel 106 associated to the winding roller 59 comes to rest against the bracket 221 and against the idler wheel 223, which are supported by the carriage itself.
  • the constraint is guaranteed by the fact that the carriage is constantly pressed against the revolver unit by the (reduced) pressure, which is in any case maintained in the cylinder of the actuator 197 and in the actuator 189B.
  • the two cylinder-piston actuators 189A, 189B making up the system 189 thus have two distinct functions: the former controls the movement of vertical translation necessary for bringing the carriage into the position P1 of Fig. 18, whilst the latter has the function of applying the horizontal reaction force for maintaining contact between the engagement members, with mutual engagement between the carriage of the loader and the revolver unit.
  • the revolver unit starts turning in the clockwise direction (Figs. 4, 4A, 7, 8, 9, and 18), as indicated by the arrow f57, about its own axis A. Thanks to the constraint formed in the way described above between the revolver unit 57 and the carriage 195 of the loader 181, the carriage itself follows the movement of the revolver unit. In this step, the rollers carried by the revolver unit keep rotating at normal running speed, feeding the web-like material, which is delivered by the unreeler to the respective roll B that is being formed and is about to be completed.
  • Actuation of the motor 217 causes the rotation of the corresponding core thanks to the friction between the latter and the friction wheels 215.
  • the operation of angular acceleration of the cores (and of the heads supporting them) is referred to as “core launching” and has the function of bringing the peripheral speed of the core up to a value approximately equal to the rate of feed of the web-like material, so that the subsequent contact between the latter and the core will take place without any mutual sliding, or at least with only minimal sliding.
  • the carriage 195 When the core-launching operation has been completed, i.e., when the core has reached the required peripheral speed, the carriage 195 has reached (following the rotation of the revolver unit 57) the position P2 of Fig. 18. In this position, the oscillating arms 103 are made to oscillate until the core C, withheld by the heads 101, 102, is brought into contact with the web-like material N that is run over the winding roller 59.
  • the movement of approach of the core is represented in Fig. 7 (arrow f101.
  • each of the two coaxial tubular cores touches the web-like material N run over the surface of the winding roller 59, it receives motion via the web-like material as a result of the underlying winding roller 59, so that the carriage 195 of the loader 181 can be moved away, by means of the actuators 197 and 187, to return to the initial position underneath the dropping path 171 of the cores, for receiving a new pair of cores.
  • the pair of almost completed rolls B is in the discharging position, ready to be discharged after prior cutting of the web-like material.
  • the web-like material N rests on the internal surface of the web-like material N, namely on the surface facing the axis of the revolver unit 57, and, at the end of the movement of the sides 111, the web-like material comes to describe a path which embraces the core C for approximately three quarters of the circumferential development thereof, and which then develops around the sleeves 117, 119 supported idle on the bars 113 and 115.
  • cutting of the web-like material can be carried out by means of extraction of the cutting blade 137, which moves from the set-in position of Fig. 8 to the extracted position of Fig. 9.
  • the blade 127 is appropriately heated in order to facilitate the cutting operation.
  • a hot wire or another suitable cutting means could be used.
  • the free leading edge that is formed with the cutting operation is wound around the core C with the aid of jets of air generated by the blower nozzles 133.
  • the trailing edge is recalled around the completed roll B, in so far as the latter is kept in contact with the winding roller 61 until the trailing edge has been completely re-wound.
  • the slide 135 is brought back into the low position (Fig. 4), and, by means of the pusher 159, the roll is discharged onto the discharge belt 157.
  • the revolver unit 57 can start approaching the angular position in which the winding rollers 59 and 61 swap their positions to carry out the next roll-changeover cycle.

Landscapes

  • Replacement Of Web Rolls (AREA)
  • Winding Of Webs (AREA)
  • Wrappers (AREA)
  • Laminated Bodies (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Claims (37)

  1. Wickelmaschine zum Aufwickeln eines bahnförmigen Materials (N), insbesondere Plastikfolie, umfassend eine Zuführstation (5) zum Zuführen von rohrförmigen Wickelkernen (C, C1, C2) und eine Wickelstation (5) mit einer Revolvereinheit (57), auf der die rohrförmigen Wickelkerne eingesetzt werden, um darauf vorgegebene Mengen des Bahnmaterials aufzuwickeln und entsprechende Rollen (B) von aufgewickeltem Bahnmaterial zu bilden, wobei sich die Revolvereinheit um eine Rotationsachse (A) dreht und mit mindestens zwei Halterungen (102, 102, 103) für die rohrförmigen Kerne versehen ist, die in zwei jeweiligen Winkelpositionen bezüglich der Rotationsachse eingesetzt werden, wobei die Zuführstation (5) zum Zuführen der rohrförmigen Kerne einen Weg für die Abgabe rohrförmiger Kerne zu einem Kernlader (181) aufweist,
    dadurch gekennzeichnet, dass der Kernlader (181) mit einer Bewegung zur Annäherung an die Revolvereinheit (57) und einer Bewegung zum Folgen der Bewegung der Revolvereinheit versehen ist, um die rohrförmigen Kerne von dem Lader (181) zu der Revolvereinheit zu überführen.
  2. Maschine nach Anspruch 1, dadurch gekennzeichnet, dass der Lader (181) eine Kernanstoßeinrichtung (215, 217) aufweist, um die rohrförmigen Kerne in Drehung zu versetzen, bevor das Aufwickeln des Bahnmaterials auf die Kerne beginnt.
  3. Maschine nach Anspruch 2, dadurch gekennzeichnet, dass die Kernanstoßeinrichtung ein motorgetriebenes drehbares Element (215) aufweist.
  4. Maschine nach einem oder mehreren der vorangehenden Ansprüche,
    dadurch gekennzeichnet, dass der Lader (181) und die Revolvereinheit (57) Elemente (221, 223, 104, 106) für den gegenseitigen Eingriff aufweisen, um die Bewegung der Revolvereinheit mit der Bewegung des Laders bei dem Schritt der Übertragung des Kernes von dem Lader zu der Revolvereinheit und des Anstoßens der Kerne zu koordinieren.
  5. Maschine nach einem oder mehreren der vorangehenden Ansprüche,
    dadurch gekennzeichnet, dass der Lader (181) mindestens einen Trog (202) für die Ablage der Kerne, die auf die Revolvereinheit geladen werden sollen, aufweist, wobei der Ablagetrog bewegbar ist, um von dem Kern wegbewegt zu werden, sobald dieser von der entsprechenden Halterung und der Revolvereinheit ergriffen wurde.
  6. Maschine nach einem oder mehreren der vorangehenden Ansprüche,
    dadurch gekennzeichnet, dass der Lader mit einer doppelten Translationsbewegung versehen ist, nämlich sowohl in Horizontalrichtung und in Vertikalrichtung, um die Revolvereinheit zu erreichen.
  7. Maschine nach Anspruch 4, dadurch gekennzeichnet, dass die Elemente für den gegenseitigen Eingriff eine Stütze (221) und ein erstes Leerlaufrad (223) an dem Lader und ein zweites Leerlaufrad (106) an der Revolvereinheit aufweist in einer Position des gegenseitigen Eingriffs zwischen dem Lader und der Revolvereinheit, wobei das zweite Rad auf der Stütze und auf dem ersten Rad aufliegt, um auf den Lader einen Schub zu übertragen, wobei der Lader seinerseits gegen die Revolvereinheit gedrückt wird.
  8. Maschine nach einem oder mehreren der vorangehenden Ansprüche,
    dadurch gekennzeichnet, dass der Lader Mittel zum Zentrieren der Kerne aufweist.
  9. Maschine nach einem oder mehreren der vorangehenden Ansprüche,
    dadurch gekennzeichnet, dass der Weg für die Abgabe der Kerne an den Lader einen Weg (171) zum Abwerfen der Kerne (C, C1, C2) und einen schwingenden Verteiler (173) aufweist, der den Durchtritt von einzelnen Kernen von dem Abwurfweg zu dem Lader (181) gestattet.
  10. Maschine nach Anspruch 9, dadurch gekennzeichnet, dass der schwingende Verteiler zwei separate Sitze (173A, 173B) für die Aufnahme einzelner Kerne aufweist, die zu dem Lader überführt werden sollen, wobei die beiden Sitze unterschiedliche Abmessungen haben und alternativ je nach der Durchmessergröße der Kerne verwendet werden.
  11. Maschine nach einem oder mehreren der vorangehenden Ansprüche,
    dadurch gekennzeichnet, dass der Lader ein horizontales Querstück (183) aufweist, das entlang vertikaler Führungen (185) verschiebbar ist, und dass von dem Querstück ein Schlitten (195) getragen wird, der horizontal in einer Richtung senkrecht zu dem Querstück bewegbar ist, wobei der mindestens eine Trog (202) für die Ablage der Kerne von dem Schlitten getragen wird.
  12. Maschine nach Anspruch 11, dadurch gekennzeichnet, dass der Trog für die Ablage der Kerne von einer Stütze (201) getragen wird, die an den Schlitten angelenkt ist, wobei ein Betätiger (203) vorgesehen ist zum Steuern der Schwenkbewegung der Stütze relativ zu dem Schlitten.
  13. Maschine nach den Ansprüchen 2 und 12,
    dadurch gekennzeichnet, dass auf der Stütze (201) die Kemanstoßeinrichtung (215, 217) getragen ist, wobei die Schwenkbewegung der Stütze die Anstoßeinrichtung in Kontakt mit der zylindrischen Oberfläche des Kernes bringt, wenn dieser von der Revolvereinheit getragen wird.
  14. Maschine nach Anspruch 13, dadurch gekennzeichnet, dass die Anstoßeinrichtung von einem Paar von Schwenkarmen (213) getragen wird, die an der Stütze (201) angelenkt sind, wobei ein Betätiger (209) vorgesehen ist, um die Schwenkbwegung der Arme relativ zu der Stütze zu bewirken.
  15. Maschine nach einem oder mehreren der vorangehenden Ansprüche,
    dadurch gekennzeichnet, dass die Revolvereinheit (57) für jeden Kernträger eine Wickelrolle (59, 61) aufweist, die sich mit einer Umfangsgeschwindigkeit dreht, die im wesentlichen der Zuführgeschwindigkeit des Bahnmaterials entspricht, wobei der rohrförmige Kern bzw. der auf ihm gebildete Wickel frei drehbar von der entsprechenden Halterung (101, 102, 103) getragen wird und von letzterer gegen die zylindrische Oberfläche der Wickelrolle (59, 61) angedrückt wird, um in Drehung gehalten zu werden.
  16. Maschine nach Anspruch 15, dadurch gekennzeichnet, dass jeder der Kernträger ein Paar von Schwenkarmen (103) aufweist, die entsprechende Köpfe (101, 102) für den frontalen Eingriff an den Kernen tragen, wobei die Schwenkarme aus einer Position, wo sie den Kern von dem Lader (181) aufnehmen, in eine Position, in der der Kern an die entsprechende Wickelrolle herangebracht wird, bewegt werden.
  17. Maschine nach Anspruch 15 oder Anspruch 16,
    dadurch gekennzeichnet, dass die Revolvereinheit (57) mindestens ein Paar von Führungsrollen (63, 65) aufweist, über die das Bahnmaterial (N) geführt wird, wobei die Führungsrollen und die Wickelrollen in alternierenden Positionen um die Rotationsachse (A) der Revolvereinheit angeordnet sind.
  18. Maschine nach Anspruch 17, dadurch gekennzeichnet, dass die Führungsrollen motorgetrieben sind.
  19. Maschine nach Anspruch 18, dadurch gekennzeichnet, dass die Führungsrollen und die Wickelrollen mittels eines einzigen Riemens (87) in Drehung versetzt werden, der seine Bewegung von der Welle der Revolvereinheit erhält.
  20. Maschine nach einem oder mehreren der vorangehenden Ansprüche,
    dadurch gekennzeichnet, dass auf der Revolvereinheit für jede Halterung für Wickelkerne eine Einheit (111-127) angeordnet ist zum Abschneiden des Bahnmaterials (N) und zum Anbringen des Anfangsendes des Bahnmaterials auf den Wickelkern.
  21. Maschine nach Anspruch 20, dadurch gekennzeichnet, dass jede der Einheiten zum Abschneiden des Bahnmaterials und Anbringen des vorderen Endes des Bahnmaterials auf dem Wickelkern ein Paar von Führungselementen (13, 115, 117, 119) aufweist, über die das Bahnmaterial (N) geführt wird, die parallel zueinander und in einem Abstand voneinander und in einem Abstand voneinander angeordnet sind und zwischen denen ein Schneideelement (127) angeordnet ist.
  22. Maschine nach Anspruch 21, dadurch gekennzeichnet, dassdem Schneideelement (127) ein Blaselement (133) zugeordnet ist zum Andrücken des von dem Schneideelement erzeugten freien Endes des Bahnmaterials, sodass es sich um den Wikkelkern wickelt.
  23. Maschine nach Anspruch 21 oder Anspruch 22,
    dadurch gekennzeichnet, dass das Paar von Führungselementen (113, 115, 117, 119) und das zwischen ihnen angeordnete Schneideelement (127) sich von einer Position, die innerhalb des Weges des Bahnmaterials um die Revolvereinheit zurückgesetzt ist, zu einer ausgeschobenen Position bewegen können, in der die Führungselemente das Bahnmaterial um einen neuen Kern herum ablenken, auf dem das Wickeln beginnen soll.
  24. Maschine nach Anspruch 15 und 23, dadurch gekennzeichnet, dass das Paar von Führungselementen (113, 115, 117, 119) und das Schneideelement (127) von entsprechenden schwenkbaren Seiten (11) getragen werden, die um die Welle der entsprechenden Wickelrolle schwenkbar gelagert sind.
  25. Maschine nach einem oder mehreren der Ansprüche 21 bis 24,
    dadurch gekennzeichnet, dass die Führungselemente (113, 115, 117, 119) aus Stangen (113, 115) bestehen, auf der Leerlaufwalzen (117, 119) gelagert sind, über die das Bahnmaterial (N) geführt ist.
  26. Maschine nach einem oder mehreren der vorangehenden Ansprüche,
    dadurch gekennzeichnet, dass die Halterungen (101, 102, 103) für die Kerne doppelt sind, sodass jede von ihnen zwei axial fluchtende Wickelkerne trägt, und dass zwei parallele Wege für zwei Bahnmaterialien vorgesehen sind, die der Maschine gleichzeitig zugeführt werden.
  27. Maschine nach Anspruch 26, dadurch gekennzeichnet, dass der Lader doppelt vorhanden ist, um der Revolvereinheit gleichzeitig zwei Wickelkerne zuzuführen, die im wesentlichen axial fluchtend angeordnet sind.
  28. Maschine nach einem oder mehreren der vorangehenden Ansprüche,
    dadurch gekennzeichnet, dass sie eine Abgabestation (135) zum Abgeben der Wickel von der Revolvereinheit aufweist, wobei die Abgabestation einen beweglichen Wagen (137) aufweist, der mit einem Ablagetrog (151) für die fertigen Wickel versehen ist, wobei der bewegliche Wagen an die Revolvereinheit herangefahren und von dieser weg zu einem Wickelablagebereich weggefahren werden kann.
  29. Maschine nach Anspruch 28, dadurch gekennzeichnet, dass der Wagen eine Bremsrolle (125) zum Bremsen des Wickels trägt.
  30. Maschine nach Anspruch 28 oder Anspruch 29,
    dadurch gekennzeichnet, dass der Trog (151) mindestens einen Sicherheitsbügel (153) zum Zurückhalten des Wickels in dem Trog aufweist, wobei dem Sicherheitsbügel ein Betätigungselement (155) zugeordnet ist, um ihn zu öffnen und zu schließen.
  31. Maschine nach Anspruch 30, dadurch gekennzeichnet, dass dem Wagen (137) ein Ausstoßer (159) zum Ausstoßen des Wickels aus dem Trog (151) auf einen Abnahmeförderer (157) zugeordnet ist.
  32. Maschine nach einem oder mehreren der vorangehenden Ansprüche,
    dadurch gekennzeichnet, dass dem Kernlader (181) ein Zentriersystem zugeordnet ist, um die Kerne zu zentrieren, bevor sie in die Revolvereinheit eingeführt werden.
  33. Maschine nach Anspruch 32, dadurch gekennzeichnet, dass das Zentriersystem mindestens ein Paar von Seitenwänden (169) aufweist, zwischen denen die Kerne hindurchgeführt werden, wobei der Abstand zwischen den Seitenwänden ungefähr gleich oder etwas größer ist als die maximale axiale Länge der Kerne.
  34. Maschine nach Anspruch 31 oder Anspruch 32,
    dadurch gekennzeichnet, dass das Zentriersystem mindestens ein Paar von Betätigungselementen (180) für das Zentrieren der Wickelkerne aufweist.
  35. Maschine nach einem oder mehreren der vorangehenden Ansprüche,
    dadurch gekennzeichnet, dass sie eine modulare Bauweise hat.
  36. Maschine nach einem oder mehreren der vorangehenden Ansprüche,
    dadurch gekennzeichnet, dass sie einen Abwickler (1) aufweist, der mit einem oder mehreren Druckköpfen ausgerüstet ist.
  37. Maschine nach Anspruch 36, dadurch gekennzeichnet, dass der Abwickler eine doppelte Halterung (17, 19, 21, 23) für zwei Ausgangswickel von Bahnmaterial aufweist, die gleichzeitig abgewickelt werden sollen.
EP01830641A 2001-10-11 2001-10-11 Umwickelmaschine für Plasikfolie oder ähnliches Material Expired - Lifetime EP1306335B1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP01830641A EP1306335B1 (de) 2001-10-11 2001-10-11 Umwickelmaschine für Plasikfolie oder ähnliches Material
AT01830641T ATE266593T1 (de) 2001-10-11 2001-10-11 Umwickelmaschine für plasikfolie oder ähnliches material
DE60103283T DE60103283D1 (de) 2001-10-11 2001-10-11 Umwickelmaschine für Plasikfolie oder ähnliches Material
CA002407186A CA2407186A1 (en) 2001-10-11 2002-10-09 Re-reeling machine for plastic film and the like
US10/267,536 US20030089814A1 (en) 2001-10-11 2002-10-09 Re-reeling machine for plastic film and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01830641A EP1306335B1 (de) 2001-10-11 2001-10-11 Umwickelmaschine für Plasikfolie oder ähnliches Material

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EP1306335A1 EP1306335A1 (de) 2003-05-02
EP1306335B1 true EP1306335B1 (de) 2004-05-12

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EP (1) EP1306335B1 (de)
AT (1) ATE266593T1 (de)
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DE (1) DE60103283D1 (de)

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Publication number Priority date Publication date Assignee Title
DE102013220856A1 (de) * 2013-10-15 2015-04-16 Windmöller & Hölscher Kg Wickeleinrichtung zum Aufwickeln eines bahnförmigen Materials und Verfahren zum Wechsel eines Wickels in einer Wickeleinrichtung
CN112278956A (zh) * 2020-10-30 2021-01-29 九江华达医用材料有限公司 一种医用无纺布收卷机及其收卷方法

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* Cited by examiner, † Cited by third party
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US3733035A (en) * 1971-03-10 1973-05-15 C Schott Winder
US4431140A (en) * 1981-11-27 1984-02-14 The Black Clawson Company Continuous pressure roll winder
US5909856A (en) * 1997-03-05 1999-06-08 Myer; William R. Duplex slitter/rewinder with automatic splicing and surface/center winding

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DE60103283D1 (de) 2004-06-17
EP1306335A1 (de) 2003-05-02
ATE266593T1 (de) 2004-05-15
US20030089814A1 (en) 2003-05-15
CA2407186A1 (en) 2003-04-11

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