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
  • B65H23/00—Registering, tensioning, smoothing or guiding webs
  • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
  • B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
  • B65H23/188—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web
  • B65H23/1882—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web and controlling longitudinal register of web
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H23/00—Registering, tensioning, smoothing or guiding webs
  • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
  • B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
  • B65H23/188—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2403/00—Power transmission; Driving means
  • B65H2403/50—Driving mechanisms
  • B65H2403/53—Articulated mechanisms
  • B65H2403/532—Crank-and-rocker mechanism
  • B65H2403/5321—Crank-and-rocker mechanism with oscillating crank, i.e. angular movement of crank inferior to 360
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2406/00—Means using fluid
  • B65H2406/10—Means using fluid made only for exhausting gaseous medium
  • B65H2406/11—Means using fluid made only for exhausting gaseous medium producing fluidised bed
  • B65H2406/111—Means using fluid made only for exhausting gaseous medium producing fluidised bed for handling material along a curved path, e.g. fluidised turning bar
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
  • B65H2515/30—Forces; Stresses
  • B65H2515/31—Tensile forces
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2555/00—Actuating means
  • B65H2555/10—Actuating means linear
  • B65H2555/13—Actuating means linear magnetic, e.g. induction motors

Definitions

• the present invention relates to an apparatus intended to ensure the shaping of a sheet of flexible material, such as in particular a sheet of cardboard, from shaping cylinders provided with plates whose format is variable and interchangeable.
• the object of the present invention is to remedy such a drawback by proposing a shaping apparatus provided a regulation module allowing the use of plate support cylinders of a constant diameter on which the user will come to fix, according to his needs, work plates of various formats, without it being necessary , when it changes from one plate format to another plate format, to exchange the support cylinder and its drive means.
• the present invention allows the user to exchange only the shaping plates in order to pass from a determined working format to another format, within the limit of course of the peripheral length of the cylinder.
• the present invention thus relates to an apparatus for shaping a sheet of flexible material
• an apparatus for shaping a sheet of flexible material comprising at least one supply cylinder capable of delivering the sheet continuously according to a given law of displacement and speed, a shaping cylinder associated with a counterpart capable of shaping the sheet over at least part of its peripheral length, this shaping cylinder consisting of a support cylinder on which is attached at least one interchangeable shaping element fixed on its external surface, and which is animated by '' a rotational movement according to a given law of displacement and speed, characterized in that it comprises, between the supply cylinder and the shaping cylinder, a regulation module provided with call means capable of controlling the displacement and the speed of the web upstream of the shaping cylinder and at least one mobile element guide capable of exerting, on at least one buffer loop of the ply formed between said cylinders, positive guidance whose movement is controlled, according to a determined law.
• the law of displacement of the movable element for guiding the sheet will preferably be a function of the law of displacement of the supply cylinder and of the law of displacement of the call means, itself a function of the law of displacement of the shaping cylinder.
• the means of appeal will consist of at least one cylinder.
• the calling means may also consist of the movable guide element, the latter being formed of a rotary cylinder around which the sheet is wound; at least one rotary cylinder driven by a peripheral speed greater than that of the ply being disposed between the shaping cylinder and the guide cylinder.
• the guide element may consist of a rotary cylinder, or of a fixed part in rotation, around which the sheet will be wound.
• the guide element may be provided with means for blowing a gas capable of creating between itself and the sheet a gas cushion.
• the movement of movement of the guide element may in particular be linear or circular.
• the displacement When the displacement is linear it can be obtained by a linear motor comprising primary poles and secondary movable relative to each other, and means for controlling their relative movements, the guide element being integral with one of these poles.
• This linear displacement of the guide element can also be obtained by a system consisting of a connecting rod articulated at one of its ends on the latter and at its other end on a crank whose angular position will determine the linear function of the guide element.
• the guide element When the movement is circular, the guide element will consist of a guide cylinder arranged in such a way that it is capable, during its movement, of remaining tangent to another cylinder, the ply being admitted between these cylinders and wrapping around the latter to then leave in the direction of the shaping cylinder.
• This other cylinder may consist of a regulating cylinder or also of the call cylinder.
• the guide cylinder and the regulating cylinder may be slaved to one another in rotation, so that their peripheral speeds are identical.
• the circular displacement of the guide and regulation cylinders can ensure the position and speed control of the web upstream of the shaping cylinder.
• the apparatus may also include, between the supply cylinder and the call cylinder, a system for controlling the tension of the web to which the supply cylinder can be controlled, so as to maintain a constant value of the voltage thereof.
• the apparatus may include means capable of reading a cyclic mark placed on the web, comparing the position of the latter with a position reference of the shaping cylinder and, according to this comparison, modifying the positioning of the ply relative to the shaping cylinder.
• Figure 1 is a schematic view of a cutting apparatus arranged in a printing machine.
• FIG. 1a is a schematic view of an alternative embodiment of the printing machine shown in FIG. 1.
• Figure lb is a schematic view of an alternative embodiment of a guide element used in one apparatus according to one invention.
• Figures 2a and 2b are partial schematic views showing cutting cylinders in two respective positions, namely a first position corresponding to the end of the cutting phase and a second position corresponding to the start of the cutting phase.
• Figure 3 is a schematic view of an alternative embodiment of a shaping apparatus according to the invention.
• FIG. 4a is a diagram respectively representing the speed of supply of the sheet, the peripheral speed of the cutting rolls, the speed of feeding of this sheet directly upstream of the cutting rolls, the speed of the cylinder of the regulation loop of the sheet, and this on the one hand during the cutting phase and on the other hand during the end of cycle phase.
• FIG. 4b is a diagram respectively representing the positioning of the supply of the sheet, of the periphery of the cutting rolls, of the supply of this sheet directly upstream of the cutting rolls and of the cylinder of the regulation loop of the ply, and this on the one hand during the cutting phase and on the other hand during the end of cycle phase.
• FIG. 5 is a diagram of the same type as that of FIG. 4a in an embodiment of the present invention in which the speed of supply of the sheet to be cut varies during a cutting cycle.
• Figure 6 is an example of an alternative application of the shaping apparatus according to the invention.
• Figure 7 is a schematic view of a variant for constituting a control loop implemented in an apparatus according to the invention.
• FIGS. 8 and 10 are schematic views of two other alternative embodiments of the apparatus shown in FIG. 7.
• Figure 9 is a schematic view of an alternative embodiment of a movable guide element according to one invention.
• FIG. 1 a shaping apparatus 1 of a printing machine, intended to perform a cutting operation.
• This shaping device consists of a cutting cylinder 3 and its counterpart 3 ', which are rotated at a peripheral speed V c , between which a sheet of cardboard 2 to be cut is allowed at a speed V n , this ply 2 being delivered by a supply cylinder 5 and its counterpart 5 ', at a peripheral speed V e .
• this cutting plate 3b may be longer or shorter so that it will occupy a more or less important part (p) of the total periphery P of the cutting cylinder 3. It is understood under these conditions that, except to spoil a significant proportion of the sheet (equal to Pp / P) it is necessary to provide that, at the end of the cutting phase corresponding to the position of FIG. 2a, the sheet 2 is stopped while the cylinder of cut 3 and its counterpart 3 'end their rotation cycle (end of cycle phase).
• a regulating module 7 has been arranged between the supply cylinders 5 and the cutting cylinders 3.
• This regulating module makes it possible to produce a loop 8 forming a "buffer" and allows the part of ply 2 located just upstream of the cutting cylinders 3 to stop, or even to reverse, although the supply rolls 5.5 ′ continue to supply the ply 2 at a speed V e .
• the regulation module 7 consists of a guide element, here consisting of a guide cylinder 9, around which the sheet 2 is wound, and of a call cylinder 13 provided with a counterpart 13 'between which engage the web 2.
• this band is thus positively guided, that is to say that it is held by an element whose position is determined mechanically or electronically, so that the movement of the guide cylinder 9 is controlled by the movement of movement of the loop 8 and more precisely the length thereof, and not by an element whose position is determined by the strip itself, as is the case for example when a pulley or a cylinder is in gravity support on the base of the strip. It has been found that such an arrangement makes it possible to achieve much higher operating speeds.
• the guide cylinder 9 is mounted for rotation about its axis 14 and the latter is supported by a carriage 15 capable of performing a linear movement in a vertical direction perpendicular to the direction of horizontal movement of the ply 2.
• the movement of the carriage 15 may in particular be provided by a linear motor, by a connecting rod / crank system, or by any other suitable mechanism.
• the call cylinder 13 and the supply cylinder 5 are arranged in such a way with respect to the guide cylinder 9 that the two ply strands 2a situated upstream and downstream of the latter are parallel.
• FIG. 9 shows an example of a means of linear displacement of a guide element 9 ′ using a system consisting of a link 10 articulated at one of its ends on this element of guide 9 'and at its end on a crank 12 whose angular position determines that of the guide element 9'.
• the guide cylinder 9 can be fixed in rotation or, as shown in FIG. 1b, it can be other than a rotary cylinder and can be formed of a fixed return element, for example semi-cylindrical 9 '.
• FIGS. 4a and 4b respectively show, during a cycle of rotation of the cutting cylinders 3, on the one hand the speed diagram, and on the other hand the diagram of the relative positions of the supply cylinders 5 (i.e. V e , X e ) r of the cutting cylinders 3
• the position X t and the vertical displacement speed V t of the guide cylinder 9 are respectively a function of the positions X e , X n on the one hand and of the speeds V e , V n on the other hand either:
• the present invention makes it possible to control the loop 8 which, because of aerodynamic phenomena and inertia is liable to disturb, in particular at high speed, the advance of the ply 2 and its positioning both in the longitudinal and transverse directions under the plate of shaping.
• the loop 8 can take several configurations depending on the needs.
• the strands 2a of the ply 2 located upstream and downstream of the guide cylinder 9 are no longer parallel and their respective inclinations relative to the vertical are different. It is understood that in such a configuration the laws of displacement X t and of speed V t of the guide cylinder 9 will of course be different from those of the embodiment according to FIG. 1.
• the regulation loop 8 is located above the ply 2 and the guide cylinder 9 is located at the top of the latter.
• the call cylinder 13 will be located above the ply so as to effect a correct return of the latter, and moreover means are provided for tensioning this ply which are constituted a puppet 11 formed of a cylinder 16 rotatably mounted at the end of an articulated link 17 around an axis 0 and which is supported on the sheet 2.
• This puppet 11 is able to perform several functions. First of all it makes it possible to maintain an almost constant tension of the loop 8 despite the accelerations imposed on the sheet 2 during the operations.
• the device according to the invention also makes it possible to carry out shaping of plies in which the input speed V e is variable according to a specific law of variation which is well determined and which is a function of the type of work performed.
• FIG. 5 thus shows the operating parameters of the apparatus as regards relates to the positioning X c of the cutting plates, of the ply upstream of the cutting cylinders X n (dotted curve), of the ply at its supply X e and from which the positioning of the guide cylinder 9 has been deduced X t .
• the present embodiment makes it possible to place in the same machine, and successively, two shaping apparatuses of the same period having between them a phase shift.
• Figure 6 there is shown a device Pi which we see that the cutting plates are at the beginning of the cutting phase, and a second device P 2 located upstream of the device Pi and which we see that the cutting cylinders have a phase shift ⁇ with respect to the cutting cylinder of the device Pi.
• the present invention makes it possible, thanks to the regulation module 7, to compensate for the phase shift of these two devices of the same period.
• the present invention also makes it possible to produce machines comprising apparatuses of different periods and moreover having a phase shift.
• the present invention also makes it possible to compensate for variations in the peripheral speed V c of the shaping cylinders during the same shaping cycle, variations which make it possible, for example, to minimize the accelerations of the web (by reducing V c ) by giving it more time to move back and forth. It also allows, in the case where the plate 3b is of short length, this time to increase the speed peripheral V c during the end of cycle phase, which makes it possible to reduce the duration of the total cycle.
• the present invention can of course be used with shaping means other than cutting means and could advantageously be applied to means for marking folds, embossing means, stamping means, etc.
• the displacement of the guide element 9 can be other than linear, and in particular be circular.
• the guide cylinder 9 is mounted on a support sub-assembly 20, in particular consisting of two plates 21 connected at their upper part by a beam 23, this support being mounted movable in rotation about an axis 22.
• This axis 22 also constitutes the support for a regulating cylinder 24 which is tangent to the guide cylinder 9.
• the ply 2 is brought by the supply cylinder 5 bears on the cylinder regulation 24 to be admitted then between it and the guide cylinder 9 around which it is wound to finally start again towards the call cylinder 13, between which and its counterpart 13 'it is admitted.
• the cylinder 13 here performs two functions, namely its calling function, as defined in the previous embodiments, and the function previously performed by the regulating cylinder 24.
• the control / call cylinder 13 and the guide cylinder 9 are arranged on a support 20 able to pivot around the axis 22 coinciding with the axis of rotation of the control / call cylinder 13
• the support 20 pivots around the axis 22, so that the axis 25 of the guide cylinder 9 crosses the dotted line C
• the length of the loop 8 increases or decreases according to the direction of this rotation .
• FIG. 7 the control / call cylinder 13 and the guide cylinder 9 are arranged on a support 20 able to pivot around the axis 22 coinciding with the axis of rotation of the control / call cylinder 13
• the subassemblies 20 are made, in addition to its function of controlling the accumulation of the ply 2, ensuring, in addition, a second function, namely that previously performed by the take-up cylinder 13 and its counterpart 13 ', namely ensuring the control of the web upstream of the shaping cylinder 3. This control will thus be obtained by an oscillation more or less important.
• the guide cylinder 9 is used as a call cylinder in place of the cylinders 13 and 13 '.
• the guide cylinder 9 which performs the function of controlling the positioning X n and the speed V n of the ply 2 previously provided by the cylinders 13 and 13 '.
• the cylinders 13 and 13 ′ are then driven by a speed of rotation giving them an overspeed relative to the ply 2 so that they constantly spin on it.

Landscapes

• Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
• Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
• Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
• Treatment Of Fiber Materials (AREA)
• Advancing Webs (AREA)
• Preliminary Treatment Of Fibers (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=32524774

Family Applications (1)

Country Status (6)

Families Citing this family (4)

Family Cites Families (13)

• 2003
  • 2003-01-08 FR FR0300179A patent/FR2849649B1/fr not_active Expired - Fee Related
• 2004
  • 2004-01-08 EP EP04700710A patent/EP1590282A2/de not_active Withdrawn
  • 2004-01-08 US US10/541,324 patent/US20060096065A1/en not_active Abandoned
  • 2004-01-08 WO PCT/FR2004/000029 patent/WO2004069707A2/fr active Application Filing
  • 2004-01-08 CA CA002512740A patent/CA2512740A1/fr not_active Abandoned
  • 2004-01-08 JP JP2006502090A patent/JP2006515259A/ja active Pending

Non-Patent Citations (1)

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