EP3227042B1 - Tool chuck, unit for transforming a planar substrate, and operating method - Google Patents

Tool chuck, unit for transforming a planar substrate, and operating method Download PDF

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Publication number
EP3227042B1
EP3227042B1 EP15801685.7A EP15801685A EP3227042B1 EP 3227042 B1 EP3227042 B1 EP 3227042B1 EP 15801685 A EP15801685 A EP 15801685A EP 3227042 B1 EP3227042 B1 EP 3227042B1
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EP
European Patent Office
Prior art keywords
mandrel
circuit
pressure
fluid
cooling
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.)
Active
Application number
EP15801685.7A
Other languages
German (de)
French (fr)
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EP3227042A1 (en
Inventor
Philippe Clément
Pierre Robadey
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.)
Bobst Mex SA
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Bobst Mex SA
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Publication of EP3227042A1 publication Critical patent/EP3227042A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/07—Embossing, i.e. producing impressions formed by locally deep-drawing, e.g. using rolls provided with complementary profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/22—Means for cooling or heating forme or impression cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/14—Cutting, e.g. perforating, punching, slitting or trimming
    • B31B50/146—Cutting, e.g. perforating, punching, slitting or trimming using tools mounted on a drum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/14—Cutting, e.g. perforating, punching, slitting or trimming
    • B31B50/16—Cutting webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/25—Surface scoring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/25—Surface scoring
    • B31B50/256—Surface scoring using tools mounted on a drum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/74—Auxiliary operations
    • B31B50/741—Moistening; Drying; Cooling; Heating; Sterilizing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/74—Auxiliary operations
    • B31B50/88—Printing; Embossing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/08—Creasing
    • B31F1/10—Creasing by rotary tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2100/00—Rigid or semi-rigid containers made by folding single-piece sheets, blanks or webs
    • B31B2100/002—Rigid or semi-rigid containers made by folding single-piece sheets, blanks or webs characterised by the shape of the blank from which they are formed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0707—Embossing by tools working continuously
    • B31F2201/0715—The tools being rollers
    • B31F2201/0723—Characteristics of the rollers
    • B31F2201/073—Rollers having a multilayered structure

Definitions

  • the present invention relates to a rotary tool chuck for a transformation unit of a planar support.
  • the invention relates to a transformation unit comprising at least one rotary tool chuck.
  • the invention also relates to a method of operating a transformation unit of a planar support.
  • a support converting machine is intended for the manufacture of packaging.
  • an initial flat support such as a continuous strip of cardboard, is unwound and printed by a printing station comprising one or more printing units.
  • the flat support is then transferred to an introduction group, then to an embossing group, possibly followed by an upsetting group.
  • the flat support is then cut from a cutting group. After ejection of the waste zones, the poses obtained are sectioned to obtain individualized boxes.
  • the rotary transformation, embossing, upsetting, cutting, waste ejection, or printing units respectively comprise an upper cylindrical transformation tool, and a lower cylindrical transformation tool, between which the flat support circulates in order to be transformed.
  • the rotary transforming tools rotate at the same speed, but in the opposite direction to each other.
  • the flat support passes through the gap between the rotary tools, which shape a relief by embossing, shape a relief by upsetting, cut the flat support in rotary die-cut poses, eject the waste, or which print a pattern during the pressing. impression.
  • the operations of changing cylinders prove to be long and tedious.
  • the operator mechanically disconnects the cylinder to remove it from its drive mechanism.
  • the operator then takes the cylinder out of the transformation machine, and places the new cylinder back in the transformation machine by reconnecting it to its drive.
  • the weight of a cylinder is important, of the order of 50 kg to 2,000 kg. To remove it, the operator lifts it using a hoist.
  • the passage of the flat support in the successive processing groups tends to heat the flat support, in particular during its passage through the printing units.
  • the flat support heats, and in turn heats the rotating tools, because the latter, generally metallic, are very good thermal conductors.
  • the dimensions of a sleeve are therefore generally designed to limit the play between the sleeve and the mandrel during processing operations. A resulting difficulty is that when the transformer unit is stopped, the sleeve, which has a higher thermal conductivity than that of the mandrel, cools faster than the latter. The sleeve is then difficult to remove from the mandrel.
  • An object of the present invention is to provide a mandrel, a rotary tool, a unit for transforming a planar support, and an operating method which at least partially solve the drawbacks of the state of the art.
  • the rotary tool mandrel is characterized in that it comprises a fluidic cooling circuit, to allow circulation of a fluid at the level of the cylindrical core, and to cool the tool mandrel. rotary.
  • the pressure circuit and the cooling circuit are connected to one another, thus forming a single circuit with a single fluid.
  • a cooling circuit connection port is arranged at a front end of the mandrel and a pressure circuit connection port is arranged at a rear end of the mandrel.
  • the connection ports are for example aligned on an axis of rotation of the mandrel.
  • connection ports comprise a respective connection element of the mandrel, intended to cooperate with a complementary connection element of the transformation group to connect the fluidic pressure circuit to the fluidic cooling circuit.
  • the connecting elements and the complementary connecting elements are of the quick-connect type, taking a closed position when they are disconnected, and an open position allowing the passage of a fluid when connected. This automatically closes the pressure circuit when the additional connecting elements are disconnected.
  • the pressure circuit has a portion in the form of a tube, coaxial with the axis of rotation of the mandrel, around the cylindrical core.
  • the pressure circuit has at least one axial duct portion formed in each journal of the mandrel, the axial duct portion connecting a connection port.
  • the pressure circuit comprises at least a portion of a duct connecting each portion of an axial duct to the portion in the form of a tube.
  • a further subject of the invention is a unit for transforming a flat support such as a unit for upsetting, embossing, rotary die-cutting, waste ejection, or printing, comprising at least one mandrel as described. and claimed below.
  • the cooling circuit is intended to be connected to a cooling module configured to cool the fluid.
  • the cooling circuit is connected to the pressure circuit and for example forms a closed circuit.
  • the circulation of the fluid in the pressure circuit for cooling the mandrel is for example carried out in a closed circuit.
  • the connection port of the pressure circuit connected to the cooling circuit to secure the sleeve to the mandrel is for example the connection port arranged at the rear of the mandrel, on the opposite conductor side.
  • control of the attachment of the sleeve to the mandrel or the control of the cooling of the mandrel can be easily controlled and automated by the commands for connecting or disconnecting the pressure circuit to the cooling circuit.
  • the longitudinal, vertical and transverse directions indicated on the Fig. 2 are defined by the trihedron L, V, T.
  • the transverse direction T is the direction perpendicular to the direction of longitudinal displacement L of the plane support.
  • the horizontal plane corresponds to the plane L, T.
  • the front and rear positions are defined with respect to the transverse direction T, as being respectively the driver's side and the opposite driver's side.
  • a line for converting a flat support such as flat cardboard or paper in a continuous strip wound on a reel, makes it possible to carry out various operations and to obtain packaging such as folding boxes.
  • the converting line comprises, arranged one after the other in the running order of the flat support, an unwinding station 1, several printing units 2, one or more embossing units in series followed by a or several upsetting groups in series 3, followed by a rotary cutting group 4 or plate cutting, and a receiving station 5 for the articles made.
  • the converting group 7 comprises an upper rotary tool 10 and a lower rotary tool 11, which modify the planar support by printing, embossing, upsetting, cutting, ejecting waste, etc., in order to obtain a package.
  • the rotary tools 10 and 11 are mounted parallel to each other in the transformation group 7, one above the other, and extend in the transverse direction T, which is also the direction of the axes of rotation A1 and A2 of the rotary tools 10 and 11 (see Fig. 2 ).
  • the rear ends of the rotary tools 10 and 11, on the side opposite the driver, are driven in rotation by motorized drive means.
  • the rotary tools 10 and 11 rotate in opposite directions around each of the axes of rotation A1 and A2 (arrows Fs and Fi).
  • the flat support passes through the gap located between the rotary tools 10 and 11, to be embossed therein, and / or upset, and / or cut, and / or printed.
  • At least one of the two rotary tools, the upper rotary tool 10 or the lower rotary tool 11, comprises a mandrel 12 and a removable sleeve 13, insertable on the mandrel 12 in the transverse direction T ( Fig. 2 , Arrow G).
  • a mandrel 12 and a removable sleeve 13 insertable on the mandrel 12 in the transverse direction T ( Fig. 2 , Arrow G).
  • the sleeves 13 are inexpensive compared to the price of the complete rotary tool 10 and 11. It is therefore advantageous to use the same mandrel 12 in combination with several sleeves 13, rather than providing for the acquisition of several complete rotary tools 10 and 11.
  • the sleeve 13 has a generally cylindrical shape. It is for example made of aluminum material.
  • the mandrel 12 comprises a cylindrical core 14, a front journal 15, a rear journal 16 on either side of the cylindrical core 14, forming a rotation shaft of the rotary tool, and a peripheral wall 17 surrounding the cylindrical core 14 ( Fig. 3 ).
  • the front and rear journals 15 and 16 have a generally cylindrical shape. They are respectively held by front and rear bearings 18, 19 of the transformation group 7.
  • the rear journals 16 of the rotary tools 10 and 11, on the opposite driver's side are driven in rotation by a motorized drive system 20.
  • the elements of the mandrel 12, that is to say the cylindrical core 14, the front and rear journals 15 and 16 and the peripheral casing 17, are made of metallic material, such as steel.
  • the peripheral wall 17, cylindrical, can take a rest position and a blocking position in which the peripheral wall 17 exerts a radial pressure on the sleeve 13 to block the latter in position on the mandrel 12, for example by radial deformation of the peripheral wall 17.
  • the mandrel 12 also comprises a fluidic tool pressure circuit 21 formed in part between the peripheral wall 17 and the cylindrical core 14 ( Figs. 4 and 5 ), to control the exertion of radial pressure through the peripheral wall 17.
  • the pressure circuit 21 is intended to receive a fluid for pressing the peripheral wall 17 against the inner casing surface of the sleeve 13 to keep the sleeve 13 in place.
  • the sleeve 13 thus held firmly to the mandrel 12 can be driven in rotation about the axis of rotation A1 and A2.
  • the fluid is, for example, oil.
  • the pressure circuit 21 comprises a connection port 22 to a cooling fluid circuit 24 of the transformation unit 7, to allow circulation of a fluid in the pressure circuit 21 for cooling the mandrel 12.
  • a connection port 22 is arranged at a front end of the mandrel 12.
  • the pressure circuit 21 comprises another connection port 23 arranged at a rear end of the mandrel 12.
  • the pressure circuit 21 can thus emerge from the mandrel 12 by a orifice of the connection port 22 provided in the front journal 15 and by an orifice of the connection port 23 provided in the rear journal 16.
  • the connection ports 22 and 23 are for example aligned with the axis of rotation A1 or A2 of the mandrel 12, arranged at the respective ends of the front and rear journals 15 and 16.
  • the pressure circuit 21 has axial symmetry.
  • the pressure circuit 21 has a tube-shaped portion 21a, two axial duct portions 21b and two radial duct portions 21c ( Fig. 5 ).
  • the axial and radial duct portions 21b, 21c are linear.
  • the tube-shaped portion 21a is coaxial with the axis of rotation A1 or A2 of the mandrel 12. It is formed around the cylindrical core 14.
  • the peripheral wall 17 is for example shrink-wrapped and then welded to the cylindrical core 14 leaving an interstice of a few millimeters forming the tube-shaped portion 21a of the pressure circuit 21.
  • the axial duct portions 21b are aligned with the axis of rotation A1 and A2 of the mandrel 12, and are formed in a respective journal 15 and 16.
  • Each axial duct portion 21b connects a connection port 22 and 23 to a radial duct portion 21c forming a right angle.
  • Each radial duct portion 21c extends radially to connect an axial duct portion 21b at two diametrically opposed locations from one end of the tube-shaped portion 21a.
  • This embodiment of the pressure circuit 21 is simple to produce and makes it possible to maintain the sleeve 13 uniformly over its entire interior envelope surface.
  • the pressure circuit 21 is intended to be connected to the cooling circuit 24, for example by forming a closed circuit (see Fig. 4 ).
  • the transformation group 7 also comprises a cooling module 25 configured to cool the fluid circulating in the cooling circuit 24.
  • the cooling module 25 comprises for example a pump for circulating the fluid in the cooling circuit 24 and a heat exchanger capable of cooling the fluid. circulating in the cooling circuit 24.
  • connection ports 22 and 23 comprise a respective connection element 26 of the mandrel 12, intended to cooperate with a complementary connection element 27 of the transformation group 7 to connect the pressure circuit 21 to the cooling circuit. 24.
  • connection elements 26 are for example separate elements, mounted tight in an orifice of the respective connection port 22 and 23 of the pressure circuit 21.
  • connection elements 26 and the complementary connection elements 27 are for example of the quick-connect type.
  • the ends of the connecting elements 26 and 27 cooperating together are for example of the male-female type.
  • the quick couplings are further configured to assume a closed position when they are disconnected from one another and an open position allowing passage of fluid when they are connected together. This makes it possible to automatically close the pressure circuit 21 when they are disconnected, necessary for the exercise of the radial pressure by the peripheral wall 17 in order to secure the sleeve 13 to the mandrel 12.
  • connection port 22 and 23 of the pressure circuit 21, such as the connection port 23 arranged at the The rear of the mandrel 12 is only connected.
  • the connection element 26 of the connection port 22 arranged at the front of the mandrel 12 is then in the closed position, closing the pressure circuit 21 ( Fig. 5 ).
  • a fluid is sent into the pressure circuit 21.
  • the cooling circuit 24 is isolated from the cooling module 25.
  • the pressure exerted by the fluid in the pressure circuit 21 then pushes the peripheral wall 17 radially, in the blocked position. , pressing it against the inner shell surface of the sleeve 13, which secures the sleeve 13 firmly to the mandrel 12.
  • At least one of the two connection elements 26 of the mandrel 12 remains connected to the complementary connection element 27 of the transformation group 7.
  • the sleeve 13 thus firmly held to the mandrel 12 can be driven in rotation by the mandrel 12 for the production of plan support transformation operations.
  • connection elements 26 then connected to the complementary connection elements 27, allow the circulation of the fluid through the cooling circuit 24. , forming a closed circuit, to be cooled by the cooling module 25, and to cool the mandrel 12.
  • the mandrel 12 and the sleeve 13 can then be cooled. When it is sufficiently cooled, and that the peripheral wall 17 is in the rest position, the sleeve 13 can be easily removed.
  • the pressure circuit 21 used for securing the sleeve 13 to the mandrel 12 is thus also used for cooling the mandrel 12 when the transformation group 7 is stopped.
  • This second use of the pressure circuit 21 makes it possible to accelerate the cooling of the transformer. mandrel 12 to release the sleeve 13 more easily and quickly.
  • the control of the attachment of the sleeve 13 to the mandrel 12 or the cooling of the mandrel 12 can be easily controlled and automated by the commands for the connection or disconnection of the circuit. pressure 21.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Drilling And Boring (AREA)
  • Auxiliary Devices For Machine Tools (AREA)

Description

La présente invention concerne un mandrin d'outil rotatif pour un groupe de transformation d'un support plan. L'invention se rapporte à un groupe de transformation comportant au moins un mandrin d'outil rotatif. L'invention concerne également un procédé de fonctionnement d'un groupe de transformation d'un support plan.The present invention relates to a rotary tool chuck for a transformation unit of a planar support. The invention relates to a transformation unit comprising at least one rotary tool chuck. The invention also relates to a method of operating a transformation unit of a planar support.

Une machine de transformation de support est destinée à la fabrication d'emballages. Dans cette machine, un support plan initial, tel qu'une bande continue de carton, est déroulé et imprimé par une station d'impression comprenant un ou plusieurs groupes imprimeurs. Le support plan est ensuite transféré dans un groupe d'introduction, puis dans un groupe de gaufrage, éventuellement suivi par un groupe de refoulage. Le support plan est ensuite découpé dans un groupe de découpe. Après éjection des zones de déchets, les poses obtenues sont sectionnées pour obtenir des boîtes individualisées.A support converting machine is intended for the manufacture of packaging. In this machine, an initial flat support, such as a continuous strip of cardboard, is unwound and printed by a printing station comprising one or more printing units. The flat support is then transferred to an introduction group, then to an embossing group, possibly followed by an upsetting group. The flat support is then cut from a cutting group. After ejection of the waste zones, the poses obtained are sectioned to obtain individualized boxes.

Les groupes rotatifs de transformation, de gaufrage, refoulage, découpe, éjection des déchets, ou imprimeur, comportent respectivement un outil supérieur cylindrique de transformation, et un outil inférieur cylindrique de transformation, entre lesquels circule le support plan pour être transformé. En fonctionnement, les outils rotatifs de transformation tournent à la même vitesse, mais en sens inverse l'un de l'autre. Le support plan passe dans l'interstice situé entre les outils rotatifs, qui façonnent un relief par gaufrage, façonnent un relief par refoulage, découpent le support plan en poses en découpe rotative, éjectent les déchets, ou qui impriment un motif lors de l'impression.The rotary transformation, embossing, upsetting, cutting, waste ejection, or printing units respectively comprise an upper cylindrical transformation tool, and a lower cylindrical transformation tool, between which the flat support circulates in order to be transformed. In operation, the rotary transforming tools rotate at the same speed, but in the opposite direction to each other. The flat support passes through the gap between the rotary tools, which shape a relief by embossing, shape a relief by upsetting, cut the flat support in rotary die-cut poses, eject the waste, or which print a pattern during the pressing. impression.

Les opérations de changement de cylindres s'avèrent longues et fastidieuses. L'opérateur déconnecte mécaniquement le cylindre pour l'enlever de son mécanisme d'entraînement. Puis l'opérateur sort le cylindre en dehors de la machine de transformation, et replace le nouveau cylindre dans la machine de transformation en le reconnectant à son entraînement. Le poids d'un cylindre est important, de l'ordre de 50 kg à 2'000 kg. Pour le sortir, l'opérateur le soulève à l'aide d'un palan.The operations of changing cylinders prove to be long and tedious. The operator mechanically disconnects the cylinder to remove it from its drive mechanism. The operator then takes the cylinder out of the transformation machine, and places the new cylinder back in the transformation machine by reconnecting it to its drive. The weight of a cylinder is important, of the order of 50 kg to 2,000 kg. To remove it, the operator lifts it using a hoist.

En raison de son poids assez élevé, un changement de cylindre n'est pas très rapide à effectuer. En outre, de nombreux changements d'outils peuvent être nécessaires pour obtenir de très nombreuses boîtes différentes les unes des autres. Ces outils doivent être commandés longtemps à l'avance, ce qui devient incompatible avec les changements de productions demandés actuellement. De plus, des outils sont relativement coûteux à réaliser, et ils ne deviennent rentables qu'avec une production extrêmement importante.Due to its fairly heavy weight, a cylinder change is not very quick to perform. In addition, many tool changes may be necessary to obtain many, many different boxes. These tools must be ordered well in advance, which becomes incompatible with the changes in production currently requested. In addition, tools are relatively expensive to produce, and they only become profitable with extremely high production.

Ainsi certains groupes de transformation prévoient l'utilisation d'outils rotatifs composés d'un mandrin et d'un manchon amovible porteur de forme assurant la transformation, insérable sur le mandrin. Il suffit alors de changer le manchon, plutôt que la totalité de l'outil rotatif. Ceci facilite le changement d'outil du fait du faible poids du manchon et diminue les coûts, car le manchon est moins onéreux.Thus certain processing groups provide for the use of rotary tools composed of a mandrel and a removable sleeve bearing form ensuring the transformation, which can be inserted on the mandrel. It is then sufficient to change the sleeve, rather than the entire rotary tool. This facilitates the tool change due to the low weight of the sleeve and reduces costs, because the sleeve is less expensive.

Le passage du support plan dans les groupes de transformation successifs tend à chauffer le support plan, notamment lors de son passage dans les groupes imprimeurs. Le support plan chauffe, et chauffe à son tour les outils rotatifs, car ces derniers, généralement métalliques sont de très bons conducteurs thermiques. Les dimensions d'un manchon sont donc généralement prévues pour limiter le jeu entre le manchon et le mandrin lors des opérations de transformation. Une difficulté qui en résulte est qu'à l'arrêt du groupe de transformation, le manchon qui présente une conductivité thermique plus importante que celle du mandrin, se refroidit plus vite que ce dernier. Le manchon est alors difficile à retirer du mandrin.The passage of the flat support in the successive processing groups tends to heat the flat support, in particular during its passage through the printing units. The flat support heats, and in turn heats the rotating tools, because the latter, generally metallic, are very good thermal conductors. The dimensions of a sleeve are therefore generally designed to limit the play between the sleeve and the mandrel during processing operations. A resulting difficulty is that when the transformer unit is stopped, the sleeve, which has a higher thermal conductivity than that of the mandrel, cools faster than the latter. The sleeve is then difficult to remove from the mandrel.

Exposé de l'inventionDisclosure of the invention

Un but de la présente invention est de proposer un mandrin, un outil rotatif, un groupe de transformation d'un support plan, et un procédé de fonctionnement qui résolvent au moins en partie les inconvénients de l'état de la technique.An object of the present invention is to provide a mandrel, a rotary tool, a unit for transforming a planar support, and an operating method which at least partially solve the drawbacks of the state of the art.

A cet effet, la présente invention a pour objet un mandrin d'outil rotatif pour un groupe de transformation d'un support plan, sur lequel un manchon est destiné à être inséré. Le mandrin d'outil rotatif comprend:

  • un noyau cylindrique,
  • une paroi périphérique, qui est apte à prendre une position de repos et qui est apte à prendre une position de blocage en exerçant une pression radiale sur le manchon pour bloquer le manchon en position sur le mandrin d'outil rotatif, et
  • un circuit fluidique de pression, qui est ménagé entre la paroi périphérique et le noyau cylindrique, pour exercer la pression radiale sur le manchon.
To this end, the present invention relates to a rotary tool chuck for a group for transforming a flat support, on which a sleeve is intended to be inserted. The rotary tool chuck includes:
  • a cylindrical core,
  • a peripheral wall, which is able to take a rest position and which is able to take a locking position by exerting radial pressure on the sleeve to lock the sleeve in position on the rotary tool chuck, and
  • a fluidic pressure circuit, which is provided between the peripheral wall and the cylindrical core, to exert radial pressure on the sleeve.

Selon un premier aspect de l'invention, le mandrin d'outil rotatif est caractérisé en ce qu'il comprend un circuit fluidique de refroidissement, pour permettre une circulation d'un fluide au niveau du noyau cylindrique, et refroidir le mandrin d'outil rotatif.According to a first aspect of the invention, the rotary tool mandrel is characterized in that it comprises a fluidic cooling circuit, to allow circulation of a fluid at the level of the cylindrical core, and to cool the tool mandrel. rotary.

Selon l'nvention, le circuit de pression et le circuit de refroidissement sont raccordés entre eux, formant ainsi un seul et même circuit avec un seul fluide. Selon un exemple de réalisation, un port de connexion du circuit de refroidissement est agencé à une extrémité avant du mandrin et un port de connexion du circuit de pression est agencé à une extrémité arrière du mandrin. Les ports de connexion sont par exemple alignés sur un axe de rotation du mandrin.According to the invention, the pressure circuit and the cooling circuit are connected to one another, thus forming a single circuit with a single fluid. According to an exemplary embodiment, a cooling circuit connection port is arranged at a front end of the mandrel and a pressure circuit connection port is arranged at a rear end of the mandrel. The connection ports are for example aligned on an axis of rotation of the mandrel.

Selon un exemple de réalisation, les ports de connexion comportent un élément de raccord respectif du mandrin, destiné à coopérer avec un élément de raccord complémentaire du groupe de transformation pour raccorder le circuit fluidique de pression au circuit fluidique de refroidissement.According to an exemplary embodiment, the connection ports comprise a respective connection element of the mandrel, intended to cooperate with a complementary connection element of the transformation group to connect the fluidic pressure circuit to the fluidic cooling circuit.

Par exemple, les éléments de raccord et les éléments de raccord complémentaires sont de type raccords rapides, prenant une position d'obturation lorsqu'ils sont déconnectés, et une position d'ouverture autorisant le passage d'un fluide lorsqu'ils sont raccordés. Cela permet de fermer automatiquement le circuit de pression lorsque les éléments de raccord complémentaires sont déconnectés.For example, the connecting elements and the complementary connecting elements are of the quick-connect type, taking a closed position when they are disconnected, and an open position allowing the passage of a fluid when connected. This automatically closes the pressure circuit when the additional connecting elements are disconnected.

Selon une forme de réalisation, le circuit de pression présente une portion en forme de tube, coaxiale à l'axe de rotation du mandrin, autour du noyau cylindrique. Le circuit de pression présente au moins une portion de conduit axiale ménagée dans chaque tourillon du mandrin, la portion de conduit axiale reliant un port de connexion. Le circuit de pression comporte au moins une portion de conduit reliant chaque portion de conduit axiale à la portion en forme de tube. Cette forme de réalisation du circuit de pression est simple à réaliser et permet de maintenir le manchon uniformément sur toute sa surface d'enveloppe intérieure. Cette forme de circuit permet également de faire circuler le fluide d'une extrémité à l'autre du mandrin.According to one embodiment, the pressure circuit has a portion in the form of a tube, coaxial with the axis of rotation of the mandrel, around the cylindrical core. The pressure circuit has at least one axial duct portion formed in each journal of the mandrel, the axial duct portion connecting a connection port. The pressure circuit comprises at least a portion of a duct connecting each portion of an axial duct to the portion in the form of a tube. This embodiment of the pressure circuit is simple to produce and makes it possible to maintain the sleeve uniformly over its entire interior envelope surface. This form of circuit also allows the fluid to circulate from one end of the mandrel to the other.

L'invention a encore pour objet un groupe de transformation d'un support plan tel qu'un groupe de refoulage, de gaufrage, de découpe rotative, d'éjection des déchets, ou d'imprimerie, comportant au moins un mandrin tel que décrit et revendiqué ci-dessous. Le circuit de refroidissement est destiné à être raccordé à un module de refroidissement configuré pour refroidir le fluide. Le circuit de refroidissement est raccordé au circuit de pression et forme par exemple un circuit fermé.A further subject of the invention is a unit for transforming a flat support such as a unit for upsetting, embossing, rotary die-cutting, waste ejection, or printing, comprising at least one mandrel as described. and claimed below. The cooling circuit is intended to be connected to a cooling module configured to cool the fluid. The cooling circuit is connected to the pressure circuit and for example forms a closed circuit.

L'invention a encore pour objet un procédé de fonctionnement d'un groupe de transformation, tel que décrit et revendiqué ci-dessous. Le procédé comprend les étapes consistant à:

  • raccorder seulement un des deux ports de connexion du circuit de pression au circuit de refroidissement,
  • envoyer un fluide dans le circuit de pression pour que la paroi périphérique exerce une pression radiale sur le manchon, pour bloquer le manchon en position sur le mandrin, et
  • raccorder les deux ports de connexion du circuit de pression au circuit de refroidissement et faire circuler un fluide refroidi dans le circuit de pression, pour refroidir le mandrin.
A further subject of the invention is a method of operating a transformation unit, as described and claimed below. The method comprises the steps of:
  • connect only one of the two pressure circuit connection ports to the cooling circuit,
  • send a fluid into the pressure circuit so that the peripheral wall exerts radial pressure on the sleeve, to lock the sleeve in position on the mandrel, and
  • connect the two connection ports of the pressure circuit to the cooling circuit and circulate a cooled fluid in the pressure circuit, to cool the mandrel.

La circulation du fluide dans le circuit de pression pour le refroidissement du mandrin est par exemple réalisée en circuit fermé. Le port de connexion du circuit de pression raccordé au circuit de refroidissement pour solidariser le manchon au mandrin, est par exemple le port de connexion agencé à l'arrière du mandrin, côté opposé conducteur.The circulation of the fluid in the pressure circuit for cooling the mandrel is for example carried out in a closed circuit. The connection port of the pressure circuit connected to the cooling circuit to secure the sleeve to the mandrel, is for example the connection port arranged at the rear of the mandrel, on the opposite conductor side.

Ainsi, la commande de la solidarisation du manchon au mandrin ou la commande du refroidissement du mandrin, peuvent être facilement pilotés et automatisés par les commandes de raccordement ou de déconnection du circuit de pression au circuit de refroidissement.Thus, the control of the attachment of the sleeve to the mandrel or the control of the cooling of the mandrel, can be easily controlled and automated by the commands for connecting or disconnecting the pressure circuit to the cooling circuit.

Brève description des figuresBrief description of the figures

D'autres avantages et caractéristiques apparaîtront à la lecture de la description de l'invention, ainsi que sur les figures annexées qui représentent un exemple de réalisation non limitatif de l'invention et sur lesquelles:

  • la Figure 1 est une vue générale d'un exemple de ligne de transformation d'un support plan;
  • la Figure 2 représente une vue en perspective d'un outil rotatif supérieur et d'un outil rotatif inférieur;
  • la Figure 3 représente une vue en perspective d'un mandrin;
  • la Figure 4 représente une vue d'un circuit de pression raccordé à un circuit de refroidissement en formant un circuit fermé; et
  • la Figure 5 représente une vue partielle en coupe verticale d'un groupe de transformation dans laquelle sont montés deux outils rotatifs comportant respectivement un mandrin et un manchon solidarisé au mandrin.
Other advantages and characteristics will become apparent on reading the description of the invention, as well as on the appended figures which represent a non-limiting exemplary embodiment of the invention and in which:
  • the Figure 1 is a general view of an example of a transformation line of a plane support;
  • the Figure 2 shows a perspective view of an upper rotary tool and a lower rotary tool;
  • the Figure 3 shows a perspective view of a mandrel;
  • the Figure 4 shows a view of a pressure circuit connected to a cooling circuit forming a closed circuit; and
  • the Figure 5 shows a partial view in vertical section of a transformation unit in which are mounted two rotary tools comprising respectively a mandrel and a sleeve secured to the mandrel.

Les directions longitudinale, verticale et transversale indiquées sur la Fig. 2 sont définies par le trièdre L, V, T. La direction transversale T est la direction perpendiculaire à la direction de déplacement longitudinale L du support plan. Le plan horizontal correspond au plan L, T. Les positions avant et arrière sont définies par rapport à la direction transversale T, comme étant respectivement le côté conducteur et le côté opposé conducteur.The longitudinal, vertical and transverse directions indicated on the Fig. 2 are defined by the trihedron L, V, T. The transverse direction T is the direction perpendicular to the direction of longitudinal displacement L of the plane support. The horizontal plane corresponds to the plane L, T. The front and rear positions are defined with respect to the transverse direction T, as being respectively the driver's side and the opposite driver's side.

Exposé détaillé de modes de réalisation préférésDetailed discussion of preferred embodiments

Une ligne de transformation d'un support plan, tel que du carton plat ou du papier en bande continue enroulé en bobine, permet de réaliser différentes opérations et d'obtenir des d'emballages comme des boîtes pliantes. Comme le représente la Fig. 1, la ligne de transformation comprend, disposée l'une à la suite de l'autre dans l'ordre de défilement du support plan, une station dérouleur 1, plusieurs groupes imprimeurs 2, un ou plusieurs groupes de gaufrage en série suivis d'un ou plusieurs groupes de refoulage en série 3, suivie d'un groupe de découpe rotative 4 ou de découpe à platine, et une station de réception 5 des objets confectionnés.A line for converting a flat support, such as flat cardboard or paper in a continuous strip wound on a reel, makes it possible to carry out various operations and to obtain packaging such as folding boxes. As represented by the Fig. 1 , the converting line comprises, arranged one after the other in the running order of the flat support, an unwinding station 1, several printing units 2, one or more embossing units in series followed by a or several upsetting groups in series 3, followed by a rotary cutting group 4 or plate cutting, and a receiving station 5 for the articles made.

Le groupe de transformation 7 comprend un outil rotatif supérieur 10 et un outil rotatif inférieur 11, qui modifient le support plan par impression, gaufrage, refoulage, découpe, éjection des déchets, etc., en vue d'obtenir un emballage.The converting group 7 comprises an upper rotary tool 10 and a lower rotary tool 11, which modify the planar support by printing, embossing, upsetting, cutting, ejecting waste, etc., in order to obtain a package.

Les outils rotatifs 10 et 11, sont montés parallèlement l'un par rapport à l'autre dans le groupe de transformation 7, l'un au-dessus de l'autre, et s'étendent selon la direction transversale T, qui est aussi la direction des axes de rotation A1 et A2 des outils rotatifs 10 et 11 (voir Fig. 2). Les extrémités arrière des outils rotatifs 10 et 11, côté opposé conducteur, sont entraînées en rotation par des moyens d'entraînement motorisés. En fonctionnement, les outils rotatifs 10 et 11 tournent dans des sens opposés autour de chacun des axes de rotation A1 et A2 (Flèches Fs et Fi). Le support plan passe dans l'interstice situé entre les outils rotatifs 10 et 11, pour y être gaufré, et/ou refoulé, et/ou découpé, et/ou imprimé.The rotary tools 10 and 11 are mounted parallel to each other in the transformation group 7, one above the other, and extend in the transverse direction T, which is also the direction of the axes of rotation A1 and A2 of the rotary tools 10 and 11 (see Fig. 2 ). The rear ends of the rotary tools 10 and 11, on the side opposite the driver, are driven in rotation by motorized drive means. In operation, the rotary tools 10 and 11 rotate in opposite directions around each of the axes of rotation A1 and A2 (arrows Fs and Fi). The flat support passes through the gap located between the rotary tools 10 and 11, to be embossed therein, and / or upset, and / or cut, and / or printed.

Au moins un des deux outils rotatifs, l'outil rotatif supérieur 10 ou l'outil rotatif inférieur 11, comporte un mandrin 12 et un manchon amovible 13, insérable sur le mandrin 12 dans la direction transversale T (Fig. 2, Flèche G). Ainsi, lorsqu'un opérateur souhaite changer les outils rotatifs 10 et 11, il suffit de changer les manchons 13 plutôt que la totalité de l'outil rotatif 10 et 11. La manipulation du manchon 13 étant facilitée par son faible poids relativement à celui de l'outil rotatif 10 et 11 complet, le changement de travail peut être effectué rapidement. En outre, les manchons 13 sont peu coûteux comparés au prix de l'outil rotatif 10 et 11 complet. Il est donc avantageux d'utiliser un même mandrin 12 en combinaison avec plusieurs manchons 13, plutôt que de prévoir l'acquisition de plusieurs outils rotatifs 10 et 11 complets. Le manchon 13 présente une forme générale cylindrique. Il est par exemple en matériau aluminium.At least one of the two rotary tools, the upper rotary tool 10 or the lower rotary tool 11, comprises a mandrel 12 and a removable sleeve 13, insertable on the mandrel 12 in the transverse direction T ( Fig. 2 , Arrow G). Thus, when an operator wishes to change the rotary tools 10 and 11, it suffices to change the sleeves 13 rather than the whole of the rotary tool 10 and 11. The handling of the sleeve 13 is facilitated by its low weight relative to that of 10 and 11 rotary tool complete, the job change can be done quickly. Further, the sleeves 13 are inexpensive compared to the price of the complete rotary tool 10 and 11. It is therefore advantageous to use the same mandrel 12 in combination with several sleeves 13, rather than providing for the acquisition of several complete rotary tools 10 and 11. The sleeve 13 has a generally cylindrical shape. It is for example made of aluminum material.

Le mandrin 12 comporte un noyau cylindrique 14, un tourillon avant 15, un tourillon arrière 16 de part et d'autre du noyau cylindrique 14, formant un arbre de rotation de l'outil rotatif, et une paroi périphérique 17 entourant le noyau cylindrique 14 (Fig. 3). Les tourillons avant et arrière 15 et 16, présentent une forme générale cylindrique. Ils sont respectivement maintenus par des paliers avant et arrière 18, 19 du groupe de transformation 7. En fonctionnement, les tourillons arrière 16 des outils rotatifs 10 et 11, côté opposé conducteur, sont entraînés en rotation par un système d'entraînement motorisé 20. Les éléments du mandrin 12, c'est-à-dire le noyau cylindrique 14, les tourillons avant et arrière 15 et 16 et l'enveloppe périphérique 17, sont en matériau métallique, tel qu'en acier.The mandrel 12 comprises a cylindrical core 14, a front journal 15, a rear journal 16 on either side of the cylindrical core 14, forming a rotation shaft of the rotary tool, and a peripheral wall 17 surrounding the cylindrical core 14 ( Fig. 3 ). The front and rear journals 15 and 16 have a generally cylindrical shape. They are respectively held by front and rear bearings 18, 19 of the transformation group 7. In operation, the rear journals 16 of the rotary tools 10 and 11, on the opposite driver's side, are driven in rotation by a motorized drive system 20. The elements of the mandrel 12, that is to say the cylindrical core 14, the front and rear journals 15 and 16 and the peripheral casing 17, are made of metallic material, such as steel.

La paroi périphérique 17, cylindrique, peut prendre une position de repos et une position de blocage dans laquelle la paroi périphérique 17 exerce une pression radiale sur le manchon 13 pour bloquer celui-ci en position sur le mandrin 12, par exemple par déformation radiale de la paroi périphérique 17.The peripheral wall 17, cylindrical, can take a rest position and a blocking position in which the peripheral wall 17 exerts a radial pressure on the sleeve 13 to block the latter in position on the mandrel 12, for example by radial deformation of the peripheral wall 17.

Le mandrin 12 comporte également un circuit fluidique de pression d'outil 21 ménagé en partie entre la paroi périphérique 17 et le noyau cylindrique 14 (Figs. 4 et 5), pour commander l'exercice de la pression radiale par la paroi périphérique 17. Le circuit de pression 21 est destiné à recevoir un fluide pour presser la paroi périphérique 17 contre la surface d'enveloppe intérieure du manchon 13 pour maintenir le manchon 13 au mandrin 12. Le manchon 13 ainsi maintenu fermement au mandrin 12 peut être entraîné en rotation autour de l'axe de rotation A1 et A2. Le fluide est par exemple de l'huile.The mandrel 12 also comprises a fluidic tool pressure circuit 21 formed in part between the peripheral wall 17 and the cylindrical core 14 ( Figs. 4 and 5 ), to control the exertion of radial pressure through the peripheral wall 17. The pressure circuit 21 is intended to receive a fluid for pressing the peripheral wall 17 against the inner casing surface of the sleeve 13 to keep the sleeve 13 in place. mandrel 12. The sleeve 13 thus held firmly to the mandrel 12 can be driven in rotation about the axis of rotation A1 and A2. The fluid is, for example, oil.

Le circuit de pression 21 comprend un port de connexion 22 à un circuit fluidique de refroidissement 24 du groupe de transformation 7, pour permettre une circulation d'un fluide dans le circuit de pression 21 pour le refroidissement du mandrin 12. Selon un exemple de réalisation, un port de connexion 22 est agencé à une extrémité avant du mandrin 12. Le circuit de pression 21 comprend un autre port de connexion 23 agencé à une extrémité arrière du mandrin 12. Le circuit de pression 21 peut ainsi déboucher du mandrin 12 par un orifice du port de connexion 22 ménagé dans le tourillon avant 15 et par un orifice du port de connexion 23 ménagé dans le tourillon arrière 16. Les ports de connexion 22 et 23 sont par exemple alignés sur l'axe de rotation A1 ou A2 du mandrin 12, agencés aux extrémités respectives des tourillons avant et arrière 15 et 16. Selon une forme de réalisation, le circuit de pression 21 présente une symétrie axiale.The pressure circuit 21 comprises a connection port 22 to a cooling fluid circuit 24 of the transformation unit 7, to allow circulation of a fluid in the pressure circuit 21 for cooling the mandrel 12. According to an exemplary embodiment , a connection port 22 is arranged at a front end of the mandrel 12. The pressure circuit 21 comprises another connection port 23 arranged at a rear end of the mandrel 12. The pressure circuit 21 can thus emerge from the mandrel 12 by a orifice of the connection port 22 provided in the front journal 15 and by an orifice of the connection port 23 provided in the rear journal 16. The connection ports 22 and 23 are for example aligned with the axis of rotation A1 or A2 of the mandrel 12, arranged at the respective ends of the front and rear journals 15 and 16. According to one embodiment, the pressure circuit 21 has axial symmetry.

Par exemple, le circuit de pression 21 présente une portion en forme de tube 21a, deux portions de conduit axiales 21b et deux portions de conduit radiales 21c (Fig. 5). Les portions de conduit axiales et radiales 21b, 21c sont linéaires. La portion en forme de tube 21a est coaxiale à l'axe de rotation A1 ou A2 du mandrin 12. Elle est ménagée autour du noyau cylindrique 14. La paroi périphérique 17 est par exemple frettée puis soudée au noyau cylindrique 14 en laissant un interstice de quelques millimètres formant la portion en forme de tube 21a du circuit de pression 21.For example, the pressure circuit 21 has a tube-shaped portion 21a, two axial duct portions 21b and two radial duct portions 21c ( Fig. 5 ). The axial and radial duct portions 21b, 21c are linear. The tube-shaped portion 21a is coaxial with the axis of rotation A1 or A2 of the mandrel 12. It is formed around the cylindrical core 14. The peripheral wall 17 is for example shrink-wrapped and then welded to the cylindrical core 14 leaving an interstice of a few millimeters forming the tube-shaped portion 21a of the pressure circuit 21.

Les portions de conduit axiales 21b sont alignées sur l'axe de rotation A1 et A2 du mandrin 12, et sont ménagées dans un tourillon 15 et 16 respectif. Chaque portion de conduit axiale 21b relie un port de connexion 22 et 23 à une portion de conduit radiale 21c en formant un angle droit. Chaque portion de conduit radiale 21c s'étend radialement pour relier une portion de conduit axiale 21b en deux endroits diamétralement opposés d'une extrémité de la portion en forme de tube 21a. Cette forme de réalisation du circuit de pression 21 est simple à réaliser et permet de maintenir le manchon 13 de façon uniforme sur toute sa surface d'enveloppe intérieure.The axial duct portions 21b are aligned with the axis of rotation A1 and A2 of the mandrel 12, and are formed in a respective journal 15 and 16. Each axial duct portion 21b connects a connection port 22 and 23 to a radial duct portion 21c forming a right angle. Each radial duct portion 21c extends radially to connect an axial duct portion 21b at two diametrically opposed locations from one end of the tube-shaped portion 21a. This embodiment of the pressure circuit 21 is simple to produce and makes it possible to maintain the sleeve 13 uniformly over its entire interior envelope surface.

Le circuit de pression 21 est destiné à être raccordé au circuit de refroidissement 24, par exemple en formant un circuit fermé (voir Fig. 4). Le groupe de transformation 7 comporte également un module de refroidissement 25 configuré pour refroidir le fluide circulant dans le circuit de refroidissement 24. Le module de refroidissement 25 comporte par exemple une pompe pour faire circuler le fluide dans le circuit de refroidissement 24 et un échangeur thermique apte à refroidir le fluide circulant dans le circuit de refroidissement 24.The pressure circuit 21 is intended to be connected to the cooling circuit 24, for example by forming a closed circuit (see Fig. 4 ). The transformation group 7 also comprises a cooling module 25 configured to cool the fluid circulating in the cooling circuit 24. The cooling module 25 comprises for example a pump for circulating the fluid in the cooling circuit 24 and a heat exchanger capable of cooling the fluid. circulating in the cooling circuit 24.

Selon un exemple de réalisation, les ports de connexion 22 et 23 comportent un élément de raccord 26 respectif du mandrin 12, destiné à coopérer avec un élément de raccord complémentaire 27 du groupe de transformation 7 pour raccorder le circuit de pression 21 au circuit de refroidissement 24.According to an exemplary embodiment, the connection ports 22 and 23 comprise a respective connection element 26 of the mandrel 12, intended to cooperate with a complementary connection element 27 of the transformation group 7 to connect the pressure circuit 21 to the cooling circuit. 24.

Les éléments de raccord 26 sont par exemple des éléments distincts, montés serrés dans un orifice du port de connexion 22 et 23 respectif du circuit de pression 21. Les éléments de raccord 26 et les éléments de raccord complémentaires 27 sont par exemple de type raccords rapides. Les extrémités des éléments de raccord 26 et 27 coopérant ensemble sont par exemple de type male-femelle.The connection elements 26 are for example separate elements, mounted tight in an orifice of the respective connection port 22 and 23 of the pressure circuit 21. The connection elements 26 and the complementary connection elements 27 are for example of the quick-connect type. . The ends of the connecting elements 26 and 27 cooperating together are for example of the male-female type.

Les raccords rapides sont en outre configurés pour prendre une position d'obturation lorsqu'ils sont déconnectés l'un de l'autre et une position d'ouverture autorisant le passage du fluide lorsqu'ils sont raccordés ensemble. Cela permet de fermer automatiquement le circuit de pression 21 lorsqu'ils sont déconnectés, nécessaire pour l'exercice de la pression radiale par la paroi périphérique 17 afin de solidariser le manchon 13 au mandrin 12.The quick couplings are further configured to assume a closed position when they are disconnected from one another and an open position allowing passage of fluid when they are connected together. This makes it possible to automatically close the pressure circuit 21 when they are disconnected, necessary for the exercise of the radial pressure by the peripheral wall 17 in order to secure the sleeve 13 to the mandrel 12.

Dans un exemple de procédé de fonctionnement du groupe de transformation 7, pour bloquer le manchon 13 en position sur le mandrin 12, un des deux ports de connexion 22 et 23 du circuit de pression 21, tel que le port de connexion 23 agencé à l'arrière du mandrin 12 est uniquement raccordé. L'élément de raccord 26 du port de connexion 22 agencé à l'avant du mandrin 12 est alors en position d'obturation, fermant le circuit de pression 21 (Fig. 5).In an example of an operating method of the transformation group 7, to block the sleeve 13 in position on the mandrel 12, one of the two connection ports 22 and 23 of the pressure circuit 21, such as the connection port 23 arranged at the The rear of the mandrel 12 is only connected. The connection element 26 of the connection port 22 arranged at the front of the mandrel 12 is then in the closed position, closing the pressure circuit 21 ( Fig. 5 ).

Puis, un fluide est envoyé dans le circuit de pression 21. Le circuit de refroidissement 24 est isolé du module de refroidissement 25. La pression exercée par le fluide dans le circuit de pression 21 pousse alors la paroi périphérique 17 radialement, en position de blocage, la pressant contre la surface d'enveloppe intérieure du manchon 13, ce qui fixe le manchon 13 fermement au mandrin 12.Then, a fluid is sent into the pressure circuit 21. The cooling circuit 24 is isolated from the cooling module 25. The pressure exerted by the fluid in the pressure circuit 21 then pushes the peripheral wall 17 radially, in the blocked position. , pressing it against the inner shell surface of the sleeve 13, which secures the sleeve 13 firmly to the mandrel 12.

Au moins un des deux éléments de raccord 26 du mandrin 12 reste connecté de l'élément de raccord complémentaire 27 du groupe de transformation 7. Le manchon 13 ainsi fermement maintenu au mandrin 12 peut être entraîné en rotation par le mandrin 12 pour la réalisation des opérations de transformation du support plan.At least one of the two connection elements 26 of the mandrel 12 remains connected to the complementary connection element 27 of the transformation group 7. The sleeve 13 thus firmly held to the mandrel 12 can be driven in rotation by the mandrel 12 for the production of plan support transformation operations.

A la fin des opérations, une fois le groupe de transformation 7 à l'arrêt, c'est-à-dire lorsque les outils rotatifs ne tournent plus, la pression du fluide est diminuée pour désolidariser le manchon 13 au mandrin 12.At the end of the operations, once the transformation group 7 has stopped, that is to say when the rotary tools are no longer turning, the fluid pressure is reduced to separate the sleeve 13 from the mandrel 12.

Puis, l'autre des deux ports de connexion 22 du circuit de pression 21 est raccordé au circuit de refroidissement 24. Les éléments de raccord 26 alors raccordés aux éléments de raccord complémentaire 27, autorisent la circulation du fluide à travers le circuit de refroidissement 24, en formant un circuit fermé, pour être refroidi par le module de refroidissement 25, et refroidir le mandrin 12. Le mandrin 12 et le manchon 13 peuvent alors être refroidis. Lorsqu'il est suffisamment refroidi, et que la paroi périphérique 17 est en position de repos, le manchon 13 peut être facilement retiré.Then, the other of the two connection ports 22 of the pressure circuit 21 is connected to the cooling circuit 24. The connection elements 26 then connected to the complementary connection elements 27, allow the circulation of the fluid through the cooling circuit 24. , forming a closed circuit, to be cooled by the cooling module 25, and to cool the mandrel 12. The mandrel 12 and the sleeve 13 can then be cooled. When it is sufficiently cooled, and that the peripheral wall 17 is in the rest position, the sleeve 13 can be easily removed.

Le circuit de pression 21 utilisé pour la solidarisation du manchon 13 au mandrin 12 est ainsi également utilisé pour le refroidissement du mandrin 12 à l'arrêt du groupe de transformation 7. Cette seconde utilisation du circuit de pression 21 permet d'accélérer le refroidissement du mandrin 12 pour libérer plus facilement et rapidement le manchon 13. De plus, la commande de la solidarisation du manchon 13 au mandrin 12 ou le refroidissement du mandrin 12, peuvent être facilement pilotés et automatisés par les commandes du raccordement ou de la déconnection du circuit de pression 21.The pressure circuit 21 used for securing the sleeve 13 to the mandrel 12 is thus also used for cooling the mandrel 12 when the transformation group 7 is stopped. This second use of the pressure circuit 21 makes it possible to accelerate the cooling of the transformer. mandrel 12 to release the sleeve 13 more easily and quickly. In addition, the control of the attachment of the sleeve 13 to the mandrel 12 or the cooling of the mandrel 12, can be easily controlled and automated by the commands for the connection or disconnection of the circuit. pressure 21.

La présente invention n'est pas limitée aux modes de réalisation décrits et illustrés. De nombreuses modifications peuvent être réalisées, sans pour autant sortir du cadre défini par la portée du jeu de revendications.The present invention is not limited to the embodiments described and illustrated. Numerous modifications can be made without departing from the framework defined by the scope of the set of claims.

Claims (14)

  1. Rotary tool mandrel for a conversion unit for modifying a flat substrate, on which a sleeve (13) is intended to be received thereon, the rotary tool mandrel comprising:
    - a cylindrical core (14),
    - a peripheral wall (17) capable of taking a rest position and a blocking position by exerting a radial pressure on the sleeve (13) to block it in position on the mandrel (12), and
    - a pressure fluid circuit (21), arranged between the peripheral wall (17) and the cylindrical core (14) to exert the radial pressure on the sleeve (13),
    - a cooling fluid circuit (24), to allow a circulation of a fluid at the level of the cylindrical core (14), and to cool the mandrel (12),
    characterised in that
    - the pressure fluid circuit (21) and the cooling fluid circuit (24) are connected together, the pressure fluid circuit (21) comprising two ports for connecting (22, 23) to the cooling fluid circuit (24) to allow a circulation of a fluid in the pressure fluid circuit (21) for the cooling of the mandrel (12).
  2. Mandrel according to claim 1, wherein a connecting port (22) is arranged at a front end of the mandrel (12) and a connecting port (23) is arranged at a rear end of the mandrel (12).
  3. Mandrel according to claim 2, wherein the connecting ports (22, 23) are aligned on an axis of rotation (A1, A2) of the mandrel (12).
  4. Mandrel according to one of the preceding claims, wherein the connecting ports (22, 23) comprise a respective connecting element (26) of the mandrel (12), intended to engage with a complementary connecting element (27) of the modifying unit (7) to connect the pressure circuit (21) to the cooling circuit (24).
  5. Mandrel according to claim 4, wherein the connecting elements (26) and the complementary connecting elements (27) are of the rapid connector type, taking a blocking position when they are disconnected, and an opening position enabling the passage of a fluid when they are connected.
  6. Mandrel according to one of the preceding claims, wherein the pressure circuit (21) has a tube-shaped portion (21a), coaxial to the axis of rotation (A1, A2) of the mandrel (12), around the cylindrical core (14).
  7. Mandrel according to one of the preceding claims, wherein the pressure circuit (21) has at least one axial conduit portion (21b) arranged in each pin (15, 16) of the mandrel (12), the axial conduit portion (21b) connecting a connecting port (22, 23).
  8. Mandrel according to claim 7, wherein the pressure circuit (21) comprises at least one conduit portion (21c) connecting each axial conduit portion (21b) to the tube-shaped portion (21a).
  9. Unit for modifying a flat material, comprising at least one mandrel (12) according to one of the preceding claims.
  10. Unit according to claim 9, wherein the cooling circuit (24) is connected to a cooling module (25) to cool the fluid.
  11. Unit according to claim 10, wherein the pressure circuit (21) connected to the cooling circuit (24) forms a closed circuit.
  12. Method for operating a modifying unit according to one of claims 9 to 11, comprising steps consisting of:
    - only connecting one of the two ports for connecting (22, 23) the pressure circuit (21) to the cooling circuit (24),
    - sending a fluid in the pressure circuit (21) such that the peripheral wall (17) exerts a radial pressure on the sleeve (13), to block the sleeve (13) in position on the mandrel (12), and
    - connecting the two ports for connecting (22, 23) the pressure circuit (21) to the cooling circuit (24) and to make a cooled fluid circulate in the pressure circuit (21), to cool the mandrel (12).
  13. Method according to claim 12, wherein the circulation of the fluid in the pressure circuit (21) for the cooling of the mandrel (12) is done in a closed circuit.
  14. Method according to claim 12 or 13, wherein the connecting port (23) of the pressure circuit (21) connected to the cooling circuit to secure the sleeve (13) to the mandrel (12), is the connecting port (23) arranged behind the mandrel (12), on the opposite conductor side.
EP15801685.7A 2014-12-04 2015-11-20 Tool chuck, unit for transforming a planar substrate, and operating method Active EP3227042B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14020104 2014-12-04
PCT/EP2015/025086 WO2016087047A1 (en) 2014-12-04 2015-11-20 Rotary tool chuck, unit for modifying a flat material, and operating method

Publications (2)

Publication Number Publication Date
EP3227042A1 EP3227042A1 (en) 2017-10-11
EP3227042B1 true EP3227042B1 (en) 2021-12-08

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Application Number Title Priority Date Filing Date
EP15801685.7A Active EP3227042B1 (en) 2014-12-04 2015-11-20 Tool chuck, unit for transforming a planar substrate, and operating method

Country Status (7)

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US (1) US10464276B2 (en)
EP (1) EP3227042B1 (en)
JP (1) JP6445159B2 (en)
KR (1) KR20170086084A (en)
CN (1) CN107107518B (en)
ES (1) ES2902695T3 (en)
WO (1) WO2016087047A1 (en)

Families Citing this family (2)

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CN109177314A (en) * 2018-10-25 2019-01-11 宁夏金世纪包装印刷有限公司 A kind of three pressing cylinders of packaging processing
DE102021129739A1 (en) * 2021-11-15 2023-05-17 Matthews International GmbH Sleeve changing calender for rotary embossing of a multi-ply tissue web

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Also Published As

Publication number Publication date
JP2018505789A (en) 2018-03-01
US10464276B2 (en) 2019-11-05
CN107107518A (en) 2017-08-29
JP6445159B2 (en) 2018-12-26
KR20170086084A (en) 2017-07-25
CN107107518B (en) 2020-11-06
ES2902695T3 (en) 2022-03-29
EP3227042A1 (en) 2017-10-11
WO2016087047A1 (en) 2016-06-09
US20170305095A1 (en) 2017-10-26

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