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EP2000270B1 - Cutting mandrel return device for spiral winder - Google Patents

Cutting mandrel return device for spiral winder Download PDF

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Publication number
EP2000270B1
EP2000270B1 EP08305226A EP08305226A EP2000270B1 EP 2000270 B1 EP2000270 B1 EP 2000270B1 EP 08305226 A EP08305226 A EP 08305226A EP 08305226 A EP08305226 A EP 08305226A EP 2000270 B1 EP2000270 B1 EP 2000270B1
Authority
EP
European Patent Office
Prior art keywords
mandrel
return bar
roller
cutting
return
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP08305226A
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German (de)
French (fr)
Other versions
EP2000270A1 (en
Inventor
Claude Priester
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.)
Eberle (societe Par Actions Simplifiee)
Original Assignee
Eberle (societe Par Actions Simplifiee)
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Publication of EP2000270A1 publication Critical patent/EP2000270A1/en
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Publication of EP2000270B1 publication Critical patent/EP2000270B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/16—Cutting rods or tubes transversely
    • B26D3/164—Cutting rods or tubes transversely characterised by means for supporting the tube from the inside
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/56—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting

Definitions

  • the present invention relates to the field of the manufacture of paper tubes, cardboard or other, in particular of thin wall thickness tubes, by means of machines called spiralers.
  • the paper, cardboard or other tubes are generally made by continuous longitudinal winding of one or more strips joined and offset on a mandrel of appropriate section, called spiraling mandrel, until a required thickness is obtained. These tubes are then cut for the production of sections of identical or different lengths, depending on their subsequent use on a cutting machine of the tube cutter or multi-knife type. For this purpose, and because of the process of manufacture by spiraling, the tube is driven by a rotational movement and translation and one or more knives penetrate transversely to the longitudinal axis of the tube in the constituent material, until what the cut is done.
  • a counter-tube In particular in the case of tubes with a small wall thickness, to prevent deformation of the tube during cutting, or ovalization, as well as tearing of the material inside the tube, there is provided in said tube a counter-tube. piece, called cutting chuck and which is placed in line with the cutter or knives.
  • an on-the-fly cutting device comprising one or more free or motorized knives mounted on a movable carriage moving in synchronism with the tube in formation, in the longitudinal direction of the axis of the tube, and returning to a starting position, after cutting.
  • the movable carriage returns to its starting position and the cutting mandrel is removed via its cylinder or the ball screw, the action of said cylinder or ball screw being canceled as soon as the mandrel arrives at its starting position, for example by setting the pressure chamber of the cylinder or by disengaging the ball screw to allow free driving of the cutting mandrel during the formation of the tube.
  • a cutting mandrel can be used with a spiraleuse.
  • the moment of the chuck can be provided by several means, including a cylinder, a motor, a rack and a ball screw.
  • the present invention is defined in claim 1 and is intended to overcome these disadvantages by providing a cutting mandrel return device allowing a reduction in the overall size of the spiral, and a simplification of the drive of the reminder bar.
  • FIG. 1 By way of example, the accompanying drawings show a spiraling machine comprising a spiraling head 1 provided with a fixed spiraling mandrel 2, a cutting mandrel 3 mounted at the end of a return rod 4 and cooperating with a Cutting mandrel return device 3.
  • a spiraling machine comprising a spiraling head 1 provided with a fixed spiraling mandrel 2, a cutting mandrel 3 mounted at the end of a return rod 4 and cooperating with a Cutting mandrel return device 3.
  • the other component parts of the spiral which are not directly related to the invention, are not shown.
  • the cutting mandrel return device 3 is mounted at the rear of the spiraling head 1, in the longitudinal axis of the fixed spiraling mandrel 2, and is constituted by means of friction drive of the return bar 4 and by means for guiding and controlling the position of said return bar 4.
  • the friction drive means of the return rod 4 consists essentially of a frame 12 for mounting on the spiral head 1, on which is mounted a set of friction rollers 6 and 7, the roller 6 of which is a roller driven by a reversible motor 8 and whose roller 7 is mounted loosely on a pivoting support 9 actuated by pivoting via a cylinder 10, against the action of a return spring 11.
  • the return bar 4 passes through the fixed spiraling mandrel 2 and the spiraling head 1, which constitutes the upper part of a spiral winder and on which is fixed the chuck return device.
  • the rollers 6 and 7 have a profile adapted to the section of the return bar.
  • the means for guiding and controlling the position of the return bar 4 essentially consist, on the one hand, of a guide rail 13 mounted in a longitudinal support 14 fixed on the frame 12 of the friction drive means of the bar 4, on the opposite side to the spiral head 1, on the other hand, in a proximity detector 15 fixed near the distal end of the longitudinal support 14 and finally in a set 16 to 18 end of the race. safety and limit stop.
  • the assembly 16 to 18 is constituted by an actuator 16, by a limit switch contact 17 and by an end-of-travel stop 18.
  • This assembly 16 to 18 is intended to prevent any accidental release of the distal end of the return bar 3 from the free end of the longitudinal support 14, a contact of the return bar 3 with the actuator 16 having the effect of tilting the latter and apply it to the limit switch 17, the latter then delivering a signal for disconnection of the power supply of the motor 8, and therefore of the drive 6.
  • the end stop 18 forms an additional safety blocking the end of the return bar 4 at the end of its displacement under the effect of inertia.
  • rollers 6 and 7 of the friction drive means of the return rod 4 allow, by an actuation of the reversible drive motor 8 in a corresponding direction, a forward or reverse movement of the cutting mandrel 3.
  • the connection between the return bar 4 and the roller 6 driven by the motor 8 is provided by pressurized application of the idler roller 7 on the return bar 4 for its nip between the rollers 6 and 7, the application of the roller 7 being carried out by means of the jack 10 causing a corresponding pivoting of the support 9 of the roller 7.
  • the roller 6 drives the return bar 4 in a translational movement along its longitudinal axis, which corresponds to the axis of the tube 19 in formation.
  • the driving motor 8 of the roller 6 is synchronized, on the one hand, with the speed of production of the tube 19 and, on the other hand, with the drive motor of the on-line cutter, of which only a knife 20 is shown.
  • the mobile support carriage of this corresponding knife is known per se and is not shown in detail.
  • the synchronization of the movements of the cutting mandrel 3, of the mobile carriage for supporting the cutting knife (s) on the fly with the speed of formation of the tube 19 is carried out in a manner known per se through the control and adjustment device. electronic speed and mutual synchronization of these speeds and is not described in more detail.
  • the control automation of the entire machine controls removal of the knife or blades of the movable carriage of the cutting device from their position in contact with the cutting mandrel 3 to a rest position and a simultaneous stop of the corresponding displacement of the cutting mandrel 3.
  • This stop of the cutting mandrel 3 is obtained by stopping the motor 8. Then the carriage The cutter and the cutting mandrel are correspondingly displaced in the opposite direction for cutting a new tube section.
  • the roller 6 is driven by the motor 8 in the opposite direction.
  • the cutting mandrel 3 is then returned towards the spiral head 1 against the fixed spiraling mandrel 2.
  • the proximity detector 15 provided in the longitudinal support 14 makes it possible to detect the end of the return rod 4 of the cutting mandrel 3 and, in correspondence with the rollers 6 and 7 of the friction drive means, to initialize the position of the cutting mandrel 3 relative to the movable carriage.
  • said return bar 4 does not require any fixed mechanical connection with its drive means, so that when the machine is at rest, this return bar 4 can be introduced into the machine through the fixed spiraling mandrel 2 to enter the space between the rollers 6 and 7 and then be pushed to the "zero" position of the cutting mandrel 4 until 5 to be identified by the proximity detector 15.
  • the initialization of the position of the mandrel can then be made by continuing the installation of the return bar 3 by means of the drive means constituted by said rollers 6 and 7.
  • a release of the pressure exerted by the jack 10 on the pivoting support 9 allows the idler roller 7 to be lifted from its contact with the return rod 4, by means of the return spring 11 acting on said pivoting support 9 and the restoring bar 4 then stops in position.
  • This embodiment makes it possible to avoid any mechanical connection operation between the return bar 3 provided with the cutting mandrel 4 and the actuating means, so that the operating time of a cutting mandrel 4 is particularly reduced, which makes it possible to obtain substantial improvement in efficiency, especially during tube diameter changes, each change requiring the establishment of a cutting chuck 4 of appropriate diameter.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
  • Gripping On Spindles (AREA)
  • Adornments (AREA)
  • Control Of Cutting Processes (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

The device (5) has a helical head (1) comprising a fixed helical mandrel (2) and a cutting mandrel (3) mounted to an end of a return bar (4) and cooperating with the device, which is mounted on rear of the helical head in a longitudinal axis of the fixed helical mandrel. A driving unit drives the return bar by friction, and control and guiding units control a position of the return bar. The driving unit comprises a chassis mounted on the helical head on which a set of friction rollers (6, 7) is mounted.

Description

La présente invention concerne le domaine de la fabrication de tubes en papier, carton ou autre, en particulier de tubes de faible épaisseur de paroi, au moyen de machines dénommées spiraleuses.The present invention relates to the field of the manufacture of paper tubes, cardboard or other, in particular of thin wall thickness tubes, by means of machines called spiralers.

Les tubes en papier, en carton ou autre, sont généralement réalisés par enroulement longitudinal en continu d'une ou de plusieurs bandes jointives et décalées sur un mandrin de section appropriée, dit mandrin de spiralage, jusqu'à obtention d'une épaisseur requise. Ces tubes sont ensuite découpés en vue de la réalisation de tronçons de longueurs identiques ou différentes, en fonction de leur utilisation ultérieure sur une machine de coupe du type coupe-tube ou multi-couteaux. A cet effet, et du fait du procédé de fabrication par spiralage, le tube est animé d'un mouvement de rotation et de translation et un ou plusieurs couteaux pénètrent transversalement à l'axe longitudinal du tube dans la matière le constituant, jusqu'à ce que la coupe soit effectuée.The paper, cardboard or other tubes are generally made by continuous longitudinal winding of one or more strips joined and offset on a mandrel of appropriate section, called spiraling mandrel, until a required thickness is obtained. These tubes are then cut for the production of sections of identical or different lengths, depending on their subsequent use on a cutting machine of the tube cutter or multi-knife type. For this purpose, and because of the process of manufacture by spiraling, the tube is driven by a rotational movement and translation and one or more knives penetrate transversely to the longitudinal axis of the tube in the constituent material, until what the cut is done.

En particulier dans le cas de tubes à faible épaisseur de paroi, pour éviter la déformation du tube pendant la coupe, ou ovalisation, ainsi que l'arrachement de la matière à l'intérieur du tube, il est prévu dans ledit tube une contre-pièce, appelée mandrin de coupe et qui est placée au droit du ou des couteaux de coupe.In particular in the case of tubes with a small wall thickness, to prevent deformation of the tube during cutting, or ovalization, as well as tearing of the material inside the tube, there is provided in said tube a counter-tube. piece, called cutting chuck and which is placed in line with the cutter or knives.

Le tube étant réalisé en continu, la découpe des tronçons de tubes est également effectuée en continu, pendant l'enroulement, au moyen d'un dispositif de coupe à la volée comportant un ou plusieurs couteaux libres ou motorisés montés sur un chariot mobile se déplaçant en synchronisme avec le tube en formation, dans le sens longitudinal de l'axe du tube, et revenant à une position de départ, après la coupe. Ceci implique que le mandrin de coupe suive le chariot et que les mouvements desdits mandrin de coupe et chariot soient synchronisés.The tube being made continuously, the cutting of the pipe sections is also carried out continuously, during the winding, by means of an on-the-fly cutting device comprising one or more free or motorized knives mounted on a movable carriage moving in synchronism with the tube in formation, in the longitudinal direction of the axis of the tube, and returning to a starting position, after cutting. This implies that the cutting mandrel follows the carriage and that the movements of said cutting mandrel and carriage are synchronized.

A cet effet, il est connu de réaliser le montage du mandrin de coupe sur une barre de rappel reliée à un vérin ou à une vis à billes ou autre, ce vérin ou cette vis à bille étant disposé derrière la spiraleuse et entraînant la barre de rappel dans le sens d'un retrait à la fin de chaque opération de coupe. Lors de la formation du tube, le mandrin de coupe accompagne le tube en formation, au niveau de la nouvelle découpe à longueur à effectuer, et le chariot mobile est synchronisé dans sa vitesse de déplacement avec la vitesse de formation du tube, donc avec la vitesse de déplacement du mandrin de coupe, lors de ladite coupe.For this purpose, it is known to realize the mounting of the cutting mandrel on a return bar connected to a jack or a ball screw or the like, this jack or this ball screw being disposed behind the spiral and driving the bar of recall in the sense of a withdrawal at the end of each cutting operation. During the formation of the tube, the cutting mandrel accompanies the tube in formation, at the level of the new cutting to length to be carried out, and the movable carriage is synchronized in its movement speed with the formation rate of the tube, and therefore with the speed of displacement of the cutting mandrel, during said cutting.

A la fin de cette dernière, le chariot mobile revient à sa position de départ et le mandrin de coupe est retiré par l'intermédiaire de son vérin ou de la vis à billes, l'action dudit vérin ou vis à billes étant annulée dès que le mandrin arrive à sa position de départ, par exemple par mise à la bâche de la chambre de pression du vérin ou par débrayage de la vis à bille pour permettre un entraînement libre du mandrin de coupe pendant la formation du tube.At the end of the latter, the movable carriage returns to its starting position and the cutting mandrel is removed via its cylinder or the ball screw, the action of said cylinder or ball screw being canceled as soon as the mandrel arrives at its starting position, for example by setting the pressure chamber of the cylinder or by disengaging the ball screw to allow free driving of the cutting mandrel during the formation of the tube.

Du document US-A1-2003/0 200 845 on connait un mandrin de coupe susceptible d'être utilisé avec une spiraleuse. Le moment du mandrin peut être assuré par plusieurs moyens, parmi lesquels un vérin, un moteur, une crémaillère et une vis à billes.Of the document US-A1-2003 / 0 200 845 we know a cutting mandrel can be used with a spiraleuse. The moment of the chuck can be provided by several means, including a cylinder, a motor, a rack and a ball screw.

Ces dispositifs de rappel de mandrin connus permettent, certes, de répondre correctement aux exigences de bon fonctionnement des spiraleuses, mais leur important encombrement en prolongement de ces dernières, outre le fait qu'il impose de disposer d'aires d'installation importantes, peut constituer une gêne pour les opérateurs, qui sont obligés de contourner ces dispositifs. De plus, ces dispositifs sont de constitution relativement complexe, du fait qu'ils nécessitent des moyens spécifiques d'assemblage de la barre de rappel au dispositif, avec intervention d'un opérateur et sont d'un prix de revient élevé.These known mandrel return devices certainly make it possible to respond correctly to the requirements of correct operation of the spiral winders, but their large space requirement in extension of the latter, besides the fact that it imposes to have large installation areas, can embarrassment for the operators, who are obliged to circumvent these devices. In addition, these devices are of relatively complex constitution, because they require specific means of assembly of the return bar to the device, with the intervention of an operator and are of a high cost.

La présente invention est définie dans la revendication 1 et a pour but de pallier ces inconvénients en proposant un dispositif de rappel de mandrin de coupe permettant une réduction de l'encombrement total de la spiraleuse, ainsi qu'une simplification de l'entraînement de la barre de rappel.The present invention is defined in claim 1 and is intended to overcome these disadvantages by providing a cutting mandrel return device allowing a reduction in the overall size of the spiral, and a simplification of the drive of the reminder bar.

L'invention sera mieux comprise, grâce à la description ci-après, qui se rapporte à un mode de réalisation préféré, donné à titre d'exemple non limitatif, et expliqué avec référence aux dessins schématiques annexés, dans lesquels :

  • la figure 1 est une vue partielle en élévation latérale et en coupe d'une spiraleuse équipée d'un dispositif de rappel de mandrin de coupe conforme à l'invention;
  • la figure 2 est une vue en élévation latérale, en coupe et à plus grande échelle, du dispositif de rappel de mandrin de coupe seul, et
  • la figure 3 est une vue en coupe agrandie du détail A de la figure 2.
The invention will be better understood, thanks to the following description, which refers to a preferred embodiment, given by way of non-limiting example, and explained with reference to the attached schematic drawings, in which:
  • the figure 1 is a partial view in side elevation and in section of a hairspring equipped with a cutting mandrel return device according to the invention;
  • the figure 2 is a side elevational view, in section and on a larger scale, of the cutting mandrel restoring device alone, and
  • the figure 3 is an enlarged sectional view of detail A of the figure 2 .

La figure 1 des dessins annexés représente, à titre d'exemple, une spiraleuse comportant une tête de spiralage 1 munie d'un mandrin de spiralage fixe 2, un mandrin de coupe 3 monté à l'extrémité d'une barre de rappel 4 et coopérant avec un dispositif 5 de rappel de mandrin de coupe 3. Pour des raisons de clarté les autres parties constitutives de la spiraleuse, qui n'ont pas de rapport direct avec l'invention, ne sont pas représentées.The figure 1 By way of example, the accompanying drawings show a spiraling machine comprising a spiraling head 1 provided with a fixed spiraling mandrel 2, a cutting mandrel 3 mounted at the end of a return rod 4 and cooperating with a Cutting mandrel return device 3. For the sake of clarity the other component parts of the spiral, which are not directly related to the invention, are not shown.

Conformément à l'invention, le dispositif 5 de rappel de mandrin de coupe 3 est monté à l'arrière de la tête de spiralage 1, dans l'axe longitudinal du mandrin de spiralage fixe 2, et il est constitué par un moyen d'entraînement par friction de la barre de rappel 4 et par des moyens de guidage et de contrôle de position de ladite barre de rappel 4.According to the invention, the cutting mandrel return device 3 is mounted at the rear of the spiraling head 1, in the longitudinal axis of the fixed spiraling mandrel 2, and is constituted by means of friction drive of the return bar 4 and by means for guiding and controlling the position of said return bar 4.

Le moyen d'entraînement par friction de la barre de rappel 4 est essentiellement constitué par un châssis 12 de montage sur la tête de spiralage 1, sur lequel est monté un ensemble de galets de friction 6 et 7, dont le galet 6 est un galet entraîné par un moteur réversible 8 et dont le galet 7 est monté fou sur un support pivotant 9 actionné en pivotement par l'intermédiaire d'un vérin 10, contre l'action d'un ressort de rappel 11. La barre de rappel 4 passe à travers le mandrin de spiralage fixe 2 et la tête de spiralage 1, qui constitue la partie supérieure d'une spiraleuse et sur laquelle est fixé le dispositif de rappel de mandrin de coupe.The friction drive means of the return rod 4 consists essentially of a frame 12 for mounting on the spiral head 1, on which is mounted a set of friction rollers 6 and 7, the roller 6 of which is a roller driven by a reversible motor 8 and whose roller 7 is mounted loosely on a pivoting support 9 actuated by pivoting via a cylinder 10, against the action of a return spring 11. The return bar 4 passes through the fixed spiraling mandrel 2 and the spiraling head 1, which constitutes the upper part of a spiral winder and on which is fixed the chuck return device.

Les galets 6 et 7 présentent un profil adapté à la section de la barre de rappel.The rollers 6 and 7 have a profile adapted to the section of the return bar.

Les moyens de guidage et de contrôle de position de la barre de rappel 4 consistent essentiellement, d'une part, en une glissière de guidage 13 montée dans un support longitudinal 14 fixé sur la châssis 12 du moyen d'entraînement par friction de la barre de rappel 4, du côté opposé à la tête de spiralage 1, d'autre part, en un détecteur de proximité 15 fixé près de l'extrémité distale du support longitudinal 14 et, enfin en un ensemble 16 à 18 de fin de course de sécurité et de butée de fin de course. L'ensemble 16 à 18 est constitué par un actionneur 16, par un contact de fin de course 17 et par une butée de fin de course 18. Cet ensemble 16 à 18 est destiné à empêcher toute sortie accidentelle de l'extrémité distale de la barre de rappel 3 hors de l'extrémité libre du support longitudinal 14, un contact de la barre de rappel 3 avec l'actionneur 16 ayant pour effet de faire basculer ce dernier et de l'appliquer sur le contact de fin de course 17, ce dernier délivrant alors un signal de coupure de l'alimentation du moteur 8, et donc de l'entraînement du galet 6. La butée de fin de course 18 forme une sécurité supplémentaire bloquant l'extrémité de la barre de rappel 4 à la fin de son déplacement sous l'effet de l'inertie.The means for guiding and controlling the position of the return bar 4 essentially consist, on the one hand, of a guide rail 13 mounted in a longitudinal support 14 fixed on the frame 12 of the friction drive means of the bar 4, on the opposite side to the spiral head 1, on the other hand, in a proximity detector 15 fixed near the distal end of the longitudinal support 14 and finally in a set 16 to 18 end of the race. safety and limit stop. The assembly 16 to 18 is constituted by an actuator 16, by a limit switch contact 17 and by an end-of-travel stop 18. This assembly 16 to 18 is intended to prevent any accidental release of the distal end of the return bar 3 from the free end of the longitudinal support 14, a contact of the return bar 3 with the actuator 16 having the effect of tilting the latter and apply it to the limit switch 17, the latter then delivering a signal for disconnection of the power supply of the motor 8, and therefore of the drive 6. The end stop 18 forms an additional safety blocking the end of the return bar 4 at the end of its displacement under the effect of inertia.

Les galets 6 et 7 du moyen d'entraînement par friction de la barre de rappel 4 permettent, par un actionnement du moteur d'entraînement réversible 8 dans un sens correspondant, un mouvement d'avance ou de recul du mandrin de coupe 3. A cet effet, la liaison entre la barre de rappel 4 et le galet 6 entraîné par le moteur 8 est assurée par application sous pression du galet fou 7 sur la barre de rappel 4 en vue de son pincement entre les galets 6 et 7, l'application du galet 7 étant réalisée par l'intermédiaire du vérin 10 provoquant un pivotement correspondant du support 9 du galet 7. Il s'ensuit que, par un effet de frottement, le galet 6 entraîne la barre de rappel 4 dans un mouvement de translation suivant son axe longitudinal, qui correspond à l'axe du tube 19 en formation.The rollers 6 and 7 of the friction drive means of the return rod 4 allow, by an actuation of the reversible drive motor 8 in a corresponding direction, a forward or reverse movement of the cutting mandrel 3. A this effect, the connection between the return bar 4 and the roller 6 driven by the motor 8 is provided by pressurized application of the idler roller 7 on the return bar 4 for its nip between the rollers 6 and 7, the application of the roller 7 being carried out by means of the jack 10 causing a corresponding pivoting of the support 9 of the roller 7. It follows that, by a friction effect, the roller 6 drives the return bar 4 in a translational movement along its longitudinal axis, which corresponds to the axis of the tube 19 in formation.

De manière connue, le moteur 8 d'entraînement du galet 6 est synchronisé, d'une part, avec la vitesse de production du tube 19 et, d'autre part, avec le moteur d'entraînement du dispositif de coupe à la volée, dont seul un couteau 20 est représenté. Le chariot mobile de support de ce couteau correspondant est connu en soi et n'est pas représenté en détail.In known manner, the driving motor 8 of the roller 6 is synchronized, on the one hand, with the speed of production of the tube 19 and, on the other hand, with the drive motor of the on-line cutter, of which only a knife 20 is shown. The mobile support carriage of this corresponding knife is known per se and is not shown in detail.

La synchronisation des mouvements du mandrin de coupe 3, du chariot mobile de support du ou des couteaux des coupes à la volée avec la vitesse de formation du tube 19 est réalisée de manière connue en soi par l'intermédiaire du dispositif de contrôle et de réglage de vitesse électronique et de synchronisation mutuelle de ces vitesses et n'est pas décrite plus en détail.The synchronization of the movements of the cutting mandrel 3, of the mobile carriage for supporting the cutting knife (s) on the fly with the speed of formation of the tube 19 is carried out in a manner known per se through the control and adjustment device. electronic speed and mutual synchronization of these speeds and is not described in more detail.

A la fin de la découpe d'un tronçon de tube, l'automatisme de contrôle de l'ensemble de la machine commande un retrait du ou des couteaux du chariot mobile du dispositif de coupe de leur position en contact avec le mandrin de coupe 3 vers une position de repos et un arrêt simultané du déplacement correspondant du mandrin de coupe 3. Cet arrêt du mandrin de coupe 3 est obtenu par arrêt du moteur 8. Ensuite, le chariot de coupe et le mandrin de coupe sont déplacés de manière correspondante en sens contraire pour la découpe d'un nouveau tronçon de tube.At the end of the cutting of a pipe section, the control automation of the entire machine controls removal of the knife or blades of the movable carriage of the cutting device from their position in contact with the cutting mandrel 3 to a rest position and a simultaneous stop of the corresponding displacement of the cutting mandrel 3. This stop of the cutting mandrel 3 is obtained by stopping the motor 8. Then the carriage The cutter and the cutting mandrel are correspondingly displaced in the opposite direction for cutting a new tube section.

A cet effet, le galet 6 est entraîné par le moteur 8 en sens contraire. Il en résulte que le mandrin de coupe 3 est alors ramené en direction de la tête de spiralage 1 contre le mandrin de spiralage fixe 2.For this purpose, the roller 6 is driven by the motor 8 in the opposite direction. As a result, the cutting mandrel 3 is then returned towards the spiral head 1 against the fixed spiraling mandrel 2.

Le détecteur de proximité 15 prévu dans le support longitudinal 14 permet de détecter l'extrémité de la barre de rappel 4 du mandrin de coupe 3 et, en correspondance avec les galets 6 et 7 du moyen d'entraînement à friction, d'initialiser la position du mandrin de coupe 3 par rapport au chariot mobile.The proximity detector 15 provided in the longitudinal support 14 makes it possible to detect the end of the return rod 4 of the cutting mandrel 3 and, in correspondence with the rollers 6 and 7 of the friction drive means, to initialize the position of the cutting mandrel 3 relative to the movable carriage.

Ainsi, à chaque retour en position de départ du mandrin de coupe 3, sa position "zéro" est parfaitement déterminée et le déplacement du mandrin de coupe 3 avec le tube en formation 19 peut être suivi de manière très précise par incrémentation de la rotation du galet 6 entraîné par le moteur 8. Il suffit alors de synchroniser la vitesse de déplacement du chariot porte-couteaux pour déplacer le ou les couteaux 20 à la même vitesse que le mandrin de coupe 3 et le tube 19 pour effectuer une coupe à la volée en continu.Thus, at each return to the starting position of the cutting mandrel 3, its "zero" position is perfectly determined and the displacement of the cutting mandrel 3 with the forming tube 19 can be followed very precisely by incrementing the rotation of the 6. It is then sufficient to synchronize the speed of movement of the cutter carriage to move the knife or knives 20 at the same speed as the cutting chuck 3 and the tube 19 to make a cut on the fly. continuously.

Du fait d'un entraînement par galets de friction 6 et 7 de la barre de rappel 4 du mandrin de coupe 3, ladite barre de rappel 4 ne nécessite aucune liaison mécanique fixe avec son moyen d'entraînement, de sorte que, lorsque la machine est au repos, cette barre de rappel 4 peut être introduite dans la machine à travers le mandrin de spiralage fixe 2 pour pénétrer dans l'espace entre les galets 6 et 7 puis être poussée vers la position "zéro" du mandrin de coupe 4 jusqu'à être repérée par le détecteur de proximité 15. L'initialisation de la position du mandrin peut alors être faite par poursuite de la mise en place de la barre de rappel 3 par l'intermédiaire du moyen d'entraînement constitué par lesdits galets 6 et 7. Un relâchement de la pression exercée par le vérin 10 sur le support pivotant 9, permet le soulèvement du galet fou 7 de son contact avec la barre de rappel 4, par l'intermédiaire du ressort de rappel 11 agissant sur ledit support pivotant 9 et la barre de rappel 4 s'immobilise alors en position..Due to a friction roller drive 6 and 7 of the return bar 4 of the cutting mandrel 3, said return bar 4 does not require any fixed mechanical connection with its drive means, so that when the machine is at rest, this return bar 4 can be introduced into the machine through the fixed spiraling mandrel 2 to enter the space between the rollers 6 and 7 and then be pushed to the "zero" position of the cutting mandrel 4 until 5 to be identified by the proximity detector 15. The initialization of the position of the mandrel can then be made by continuing the installation of the return bar 3 by means of the drive means constituted by said rollers 6 and 7. A release of the pressure exerted by the jack 10 on the pivoting support 9 allows the idler roller 7 to be lifted from its contact with the return rod 4, by means of the return spring 11 acting on said pivoting support 9 and the restoring bar 4 then stops in position.

Ce mode de réalisation permet d'éviter toute opération de liaison mécanique entre la barre de rappel 3 pourvue du mandrin de coupe 4 et le moyen d'actionnement, de sorte que le temps de mise en oeuvre d'un mandrin de coupe 4 est particulièrement réduit, ce qui permet d'obtenir une amélioration substantielle du rendement, notamment lors des changements de diamètre de tube, chaque changement nécessitant la mise en place d'un mandrin de coupe 4 de diamètre approprié.This embodiment makes it possible to avoid any mechanical connection operation between the return bar 3 provided with the cutting mandrel 4 and the actuating means, so that the operating time of a cutting mandrel 4 is particularly reduced, which makes it possible to obtain substantial improvement in efficiency, especially during tube diameter changes, each change requiring the establishment of a cutting chuck 4 of appropriate diameter.

Grâce à l'invention, il est possible de réaliser un dispositif de rappel de mandrin de coupe de constitution simple et d'encombrement inférieur à celui des dispositifs existant à ce jour. En outre, ce dispositif peut être mis en oeuvre très rapidement sans opération particulière de montage ou de démontage.Thanks to the invention, it is possible to provide a cutting mandrel return device of simple constitution and space less than the existing devices to date. In addition, this device can be implemented very quickly without special operation of assembly or disassembly.

Bien entendu, l'invention n'est pas limitée au mode de réalisation décrit et représenté aux dessins annexés. Des modifications restent possibles, notamment du point de vue de la constitution des divers éléments sans sortir pour autant du domaine de protection de l'invention lequel est défini par les revendications.Of course, the invention is not limited to the embodiment described and shown in the accompanying drawings. Modifications remain possible, especially from the point of view of the constitution of the various elements without departing from the scope of the invention which is defined by the claims.

Claims (5)

  1. A spiral winder comprising a helical head (1) provided with a fixed helical mandrel (2) and a cutting mandrel (3) mounted at the end of a return bar (4) cooperating with a device (5) for returning the cutting mandrel (3), characterised in that the device for returning the cutting mandrel is mounted at the rear of the helical head (1), in the longitudinal axis of the fixed helical mandrel (2), and in that the said device for returning the cutting mandrel consists of a friction driving means of the return bar (4) and means for guiding and controlling the position of the said return bar (4).
  2. The spiral winder according to claim 1, characterised in that the friction driving means of the return bar (4) consists essentially of a mounting chassis (12) on the helical head (1), on which an assembly of friction rollers (6 and 7) is mounted, one of the rollers (6) being a roller driven by a reversible motor (8) and the other roller (7) being mounted loosely on a pivoting support (9), which is pivoted by means of an actuator (10) against the action of a return spring (11).
  3. The spiral winder according to any one of claims 1 and 2, characterised in that the means for guiding and controlling the position of the return bar (4) consist essentially, on the one hand, of a guiding slide rail (13) mounted in a longitudinal support (14) fixed onto the chassis (12) of the friction driving means of the return bar (4) on the side opposite the helical head (1), on the other hand, of a proximity detector (15) fixed close to the distal end of the longitudinal support (14) and lastly of a safety final position setting and stop final position setting assembly (16 to 18).
  4. The spiral winder according to claim 3, characterised in that the safety final position setting and stop final position setting assembly (16 to 18) consists of an actuator (16) and a final position setting contact (17) and final position setting stop (18).
  5. The spiral winder according to claim 3, characterised in that the connection between the return bar (4) and the roller (6) driven by the motor (8) is formed by the application under pressure of the loose roller (7) onto the return bar (4) with a view to its clamping between the rollers (6 and 7), the application of the roller (7) being performed by an actuator (10) causing the corresponding pivoting of the support (9) of the roller (7).
EP08305226A 2007-06-07 2008-06-03 Cutting mandrel return device for spiral winder Not-in-force EP2000270B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0755573A FR2916998B1 (en) 2007-06-07 2007-06-07 CUTTING CHUCK RECALL DEVICE FOR SPIRAL.

Publications (2)

Publication Number Publication Date
EP2000270A1 EP2000270A1 (en) 2008-12-10
EP2000270B1 true EP2000270B1 (en) 2009-09-23

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Application Number Title Priority Date Filing Date
EP08305226A Not-in-force EP2000270B1 (en) 2007-06-07 2008-06-03 Cutting mandrel return device for spiral winder

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EP (1) EP2000270B1 (en)
AT (1) ATE443600T1 (en)
DE (1) DE602008000160D1 (en)
FR (1) FR2916998B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108789550B (en) * 2018-04-24 2020-10-23 陈剑青 Low-noise dust-free PVC pipe cutting machine

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6718853B2 (en) * 2002-04-24 2004-04-13 C. G. Bretting Manufacturing Co., Inc. Log saw apparatus and method

Also Published As

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FR2916998B1 (en) 2009-08-21
DE602008000160D1 (en) 2009-11-05
ATE443600T1 (en) 2009-10-15
FR2916998A1 (en) 2008-12-12
EP2000270A1 (en) 2008-12-10

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