FR2914577A1 - Ultrasonic cutting device for fabric with structured stitching, comprises coaxially aligned, synchronized ultrasonic flattening and cutting units - Google Patents

Ultrasonic cutting device for fabric with structured stitching, comprises coaxially aligned, synchronized ultrasonic flattening and cutting units Download PDF

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Publication number
FR2914577A1
FR2914577A1 FR0754366A FR0754366A FR2914577A1 FR 2914577 A1 FR2914577 A1 FR 2914577A1 FR 0754366 A FR0754366 A FR 0754366A FR 0754366 A FR0754366 A FR 0754366A FR 2914577 A1 FR2914577 A1 FR 2914577A1
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FR
France
Prior art keywords
wheel
fabric
ultrasonic
rolling
cutting
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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.)
Pending
Application number
FR0754366A
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French (fr)
Inventor
Orland Guedes
Michel Jacquemot
Charles Boyre
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Decoup & Soc Par Actions Simpl
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Decoup & Soc Par Actions Simpl
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Publication date
Application filed by Decoup & Soc Par Actions Simpl filed Critical Decoup & Soc Par Actions Simpl
Priority to FR0754366A priority Critical patent/FR2914577A1/en
Publication of FR2914577A1 publication Critical patent/FR2914577A1/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • 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
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/086—Means for treating work or cutting member to facilitate cutting by vibrating, e.g. ultrasonically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B29C65/083—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil
    • B29C65/086—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil using a rotary anvil
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • B29C65/7443—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc by means of ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81433—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined being toothed, i.e. comprising several teeth or pins, or being patterned
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8242—Pneumatic or hydraulic drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
    • B29C66/932—Measuring or controlling the joining process by measuring or controlling the speed by measuring the speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/93—Measuring or controlling the joining process by measuring or controlling the speed
    • B29C66/934—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed
    • B29C66/93451—Measuring or controlling the joining process by measuring or controlling the speed by controlling or regulating the speed by controlling or regulating the rotational speed, i.e. the speed of revolution
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/96—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
    • B29C66/961—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving a feedback loop mechanism, e.g. comparison with a desired value
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
    • D06H7/00—Apparatus or processes for cutting, or otherwise severing, specially adapted for the cutting, or otherwise severing, of textile materials
    • D06H7/04—Apparatus or processes for cutting, or otherwise severing, specially adapted for the cutting, or otherwise severing, of textile materials longitudinally
    • D06H7/08—Apparatus or processes for cutting, or otherwise severing, specially adapted for the cutting, or otherwise severing, of textile materials longitudinally for cutting tubular fabric longitudinally
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
    • D06H7/00—Apparatus or processes for cutting, or otherwise severing, specially adapted for the cutting, or otherwise severing, of textile materials
    • D06H7/22—Severing by heat or by chemical agents
    • D06H7/221—Severing by heat or by chemical agents by heat
    • D06H7/223—Severing by heat or by chemical agents by heat using ultrasonic vibration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/137—Beaded-edge joints or bead seals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/729—Textile or other fibrous material made from plastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8126—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81265—Surface properties, e.g. surface roughness or rugosity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2313/00—Use of textile products or fabrics as reinforcement

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

An ultrasonic cutting device for a fabric with structured stitching comprises, in coaxial alignment, an ultrasonic flattening unit (E1) and an ultrasonic cutting unit (E2) for cutting into the edge formed by the flattening, in proportion to the displacement of the fabric. The displacement speed of the fabric is detected to ensure synchronization with the flattening operation.

Description

L'invention se rattache au secteur technique des dispositifs de coupe parThe invention relates to the technical sector of cutting devices by

ultrasons.ultrasound.

Il est notoirement connu, pour un homme du métier, d'utiliser, pour la coupe de tissus, totalement ou partiellement thermofusibles, des appareils du type à ultrasons comprenant, pour l'essentiel, une sonotrode en regard de laquelle est disposé un outil sous forme d'une enclume fixe ou d'une molette circulaire.  It is well known, for a person skilled in the art, to use, for the cutting of tissues, wholly or partially thermofusible, ultrasonic type devices comprising, for the most part, a sonotrode opposite which is disposed a tool under shape of a fixed anvil or a circular wheel.

On a proposé également de réaliser des coupes par ultrasons combinées avec des opérations de laminage, par exemple pour éviter l'effilochage des lisières.  It has also been proposed to perform ultrasound cuts combined with rolling operations, for example to prevent fraying of the selvedges.

A partir de cet état de la technique, le problème que se propose de résoudre l'invention est de pouvoir assurer la coupe de certains types de tissu, tels que les tissus en forme de nappe circulaire structurées en maille qui, sous une action de coupe, ont tendance à rouler sur eux-mêmes ce qui constitue, pour l'homme du métier, le phénomène de roulage. Bien évidemment, ce phénomène de roulage des bords présente des inconvénients, notamment pour l'enroulage, la manipulation ou le transport du tissu.  From this state of the art, the problem to be solved by the invention is to be able to ensure the cutting of certain types of tissue, such as circular mesh-shaped fabrics structured mesh which, under a cutting action , tend to roll on themselves which is, for the skilled person, the rolling phenomenon. Of course, this edge rolling phenomenon has drawbacks, particularly for winding, handling or transporting the fabric.

Selon l'état de la technique, pour tenter de remédier à ces inconvénients avec ce type de tissu, on réalise, d'une manière connue, des opérations d'encollage ou de thermoformage afin de durcir ou alourdir les lisières, en ayant pour objectif de limiter le roulage. De telles opérations sont difficiles à mettre en oeuvre, tandis que les résultats obtenus ne sont pas totalement satisfaisants.  According to the state of the art, in an attempt to overcome these disadvantages with this type of fabric, in a known manner, sizing or thermoforming operations are carried out in order to harden or weigh down the selvedges, with the aim of to limit the rolling. Such operations are difficult to implement, while the results obtained are not completely satisfactory.

Pour remédier à ces inconvénients, l'invention se propose d'utiliser l'énergie ultrasonique en observant qu'il convient de tenir compte de la nature du tissu à traiter qui, de par sa structure maillée, nécessite des moyens techniques spécifiques de mise en oeuvre.  To overcome these drawbacks, the invention proposes to use ultrasonic energy by observing that it is necessary to take into account the nature of the tissue to be treated which, because of its meshed structure, requires specific technical means of implementation. artwork.

Pour atteindre ces objectifs, il a été conçu et mis au point un dispositif de coupe par ultrasons d'un tissu structuré en mailles, qui comprend, en alignement coaxial, un ensemble ultrasons apte à réaliser une opération de laminage et un ensemble apte à réaliser une opération de coupe dans la lisière résultant dudit laminage au fur et à mesure du déplacement du tissu dont la vitesse est détectée par des moyens aptes à assurer un synchronisme avec l'opération de laminage. Un autre problème que se propose de résoudre l'invention est d'éviter au tissu, lors de son déplacement, de former des vagues ou ondulations, en considérant sa structure maillée, afin de réaliser l'opération de laminage dans de bonnes conditions. Pour résoudre un tel problème, l'ensemble ultrasons de laminage comprend une sonotrode mise en pression sur une molette motorisée présentant périphériquement des aspérités, la vitesse du moteur d'entraînement de la molette étant synchronisé avec la vitesse de déplacement du tissu engagé entre la sonotrode et la molette. La synchronisation est réalisée au moyen d'une roulette, en contact avec le tissu et assujettie à un codeur incrémental qui envoie, par l'intermédiaire d'un convertisseur, une consigne de vitesse à un variateur qui commande le moteur d'entraînement de la molette.  To achieve these objectives, it has been designed and developed an ultrasonic cutting device of a structured mesh fabric, which comprises, in coaxial alignment, an ultrasound assembly capable of performing a rolling operation and an assembly capable of producing a cutting operation in the edge resulting from said rolling as the displacement of the fabric whose speed is detected by means able to ensure synchronism with the rolling operation. Another problem to be solved by the invention is to prevent the fabric, during its movement, to form waves or undulations, considering its mesh structure, to perform the rolling operation in good conditions. To solve such a problem, the ultrasonic rolling assembly comprises a sonotrode pressurized on a motorized wheel having peripherally roughness, the speed of the drive motor of the wheel being synchronized with the speed of movement of the fabric engaged between the sonotrode and the wheel. The synchronization is performed by means of a wheel, in contact with the fabric and secured to an incremental encoder which sends, via a converter, a speed reference to a drive which controls the drive motor of the motor. scroll wheel.

Avantageusement, un moyen apte à régler la vitesse du moteur, est monté entre le convertisseur et le variateur.  Advantageously, a means adapted to adjust the speed of the motor, is mounted between the converter and the drive.

Pour réaliser la coupe en tant que telle, au niveau de la lisière renforcée résultant de l'opération de laminage, l'ensemble de coupe est avantageusement un ensemble ultrasons de coupe qui comprend une sonotrode mise en pression sur un outil de coupe circulaire.  To perform the cutting as such, at the reinforced edge resulting from the rolling operation, the cutting assembly is preferably an ultrasonic cutting assembly which comprises a sonotrode pressurized on a circular cutting tool.

Pour assurer la mise en pression des outils de laminage et de coupe par rapport à leur sonotrode respective, la molette de laminage et l'outil de coupe sont assujettis, chacun, à un vérin de mise en pression par rapport à la sonotrode correspondante.  To ensure that the rolling and cutting tools are pressurized with respect to their respective sonotrode, the rolling wheel and the cutting tool are each subjected to a pressurizing cylinder with respect to the corresponding sonotrode.

Pour résoudre le problème posé de faciliter l'installation de l'ensemble du dispositif, sur une machine de traitement de tissu, par exemple, la molette de laminage et l'outil de coupe, avec leur vérin respectif, sont montés sur une platine support commune pour constituer un ensemble indépendant. La roulette et son codeur sont montés sur la platine support commune.  To solve the problem posed to facilitate the installation of the entire device, on a machine for processing tissue, for example, the rolling wheel and the cutting tool, with their respective jack, are mounted on a support plate to form an independent entity. The wheel and its encoder are mounted on the common support plate.

L'invention est exposée ci-après plus en détail à l'aide des figures des dessins annexés dans lesquels : - la figure 1 est une vue à caractère schématique montrant le principe du dispositif à la base de l'invention ; - la figure 2 est une vue partielle en perspective d'une machine équipée du dispositif selon l'invention ; - la figure 3 montre un tissu à mailles résultant d'une coupe au moyen du dispositif selon l'invention.  The invention is described below in more detail with reference to the figures of the accompanying drawings, in which: FIG. 1 is a schematic view showing the principle of the device on which the invention is based; FIG. 2 is a partial perspective view of a machine equipped with the device according to the invention; - Figure 3 shows a mesh fabric resulting from a cut by means of the device according to the invention.

Comme indiqué, l'invention trouve une application avantageuse dans le cas d'un tissu à structure maillée du type de ceux réalisé sur un métier à tisser circulaire. Par exemple, le tissu (T) est conditionné en rouleau sur un mandrin support motorisé pour être déroulé et entraîné linéairement sur un convoyeur (C) afin, par exemple, d'être découpé selon des laizes de largeur déterminée. Par exemple, le tissu (T) est maintenu sur le convoyeur (C) au moyen de picots engagés dans les mailles du tissu.  As indicated, the invention finds an advantageous application in the case of a mesh structure fabric of the type of those made on a circular loom. For example, the fabric (T) is rolled on a motorized support mandrel to be unrolled and driven linearly on a conveyor (C) in order, for example, to be cut into widths of determined width. For example, the fabric (T) is held on the conveyor (C) by means of pins engaged in the mesh of the fabric.

Dans l'ensemble illustré, le dispositif selon l'invention comprend deux ensembles ultrasons (El) et (E2) disposés en alignement coaxial, parallèlement au tissu. L'ensemble ultrasons (El) est conformé pour réaliser une opération de laminage, tandis que l'ensemble ultrasons (E2) est conformé pour réaliser une opération de coupe dans une lisière (L) résultant dudit laminage au fur et à mesure du déplacement (F) du tissu (T). Sans pour cela sortir du cadre de l'invention, on n'exclut pas de réaliser une coupe par des moyens mécaniques (lame, ciseau rotatif, ...).  In the assembly illustrated, the device according to the invention comprises two ultrasound assemblies (E1) and (E2) arranged in coaxial alignment, parallel to the tissue. The ultrasound assembly (El) is shaped to perform a rolling operation, while the ultrasound assembly (E2) is shaped to perform a cutting operation in a selvedge (L) resulting from said rolling as the displacement ( F) of the fabric (T). Without departing from the scope of the invention, it is not excluded to make a cut by mechanical means (blade, rotary chisel, ...).

L'ensemble ultrasons (El) comprend une sonotrode (1) mise en pression sur une molette (2). La sonotrode (1) et la molette (2) sont montées en combinaison avec, par exemple, un support (3) conformé pour permettre le passage du tissu entre la sonotrode (1) et la molette (2). La molette (2) présente, sur sa périphérie, des aspérités (2a) du type moletage, chevrons ou autres.  The ultrasound assembly (El) comprises a sonotrode (1) pressurized on a wheel (2). The sonotrode (1) and the wheel (2) are mounted in combination with, for example, a support (3) shaped to allow the passage of tissue between the sonotrode (1) and the wheel (2). The wheel (2) has, on its periphery, asperities (2a) of the knurling type, rafters or other.

Selon une caractéristique importante de l'invention, la molette (2) est entraînée positivement par un moteur (4). D'une manière importante, la vitesse du moteur (4) est synchronisée avec la vitesse de déplacement (F) du tissu, de manière à créer une autoadaptation de la vitesse, indépendamment de l'entraînement du rouleau de tissu. Cette synchronisation est réalisée au moyen d'une roulette (5) en contact avec le tissu et assujettie à un codeur incrémental (6). Ce codeur (6) envoie, par l'intermédiaire par exemple d'un convertisseur fréquence-tension (7), une consigne de vitesse à un variateur (8) qui commande le moteur d'entraînement (4) de la molette (2). Avantageusement, un potentiomètre (9), ou autre moyen, est monté entre le convertisseur (7) et le variateur (8), afin de régler la vitesse du moteur. A cet égard, on a pu observer qu'une survitesse du moteur améliore le marquage de produit résultant de l'opération de laminage.  According to an important characteristic of the invention, the wheel (2) is driven positively by a motor (4). Importantly, the speed of the motor (4) is synchronized with the traveling speed (F) of the fabric, so as to create a self-adaptation of the speed, regardless of the drive of the fabric roll. This synchronization is performed by means of a roller (5) in contact with the fabric and secured to an incremental encoder (6). This encoder (6) sends, via for example a frequency-voltage converter (7), a speed reference to a drive (8) which controls the drive motor (4) of the wheel (2). . Advantageously, a potentiometer (9), or other means, is mounted between the converter (7) and the variator (8), in order to adjust the speed of the motor. In this respect, it has been observed that an overspeed of the engine improves the product marking resulting from the rolling operation.

D'une manière connue, l'ensemble ultrasons (E2) comprend une sonotrode (10) mise en pression sur un outil de coupe circulaire (11). De la même façon que pour l'ensemble (El), la sonotrode (10) et l'outil de coupe circulaire (11) sont montés sur un support (12) conformé pour permettre le passage du tissu entre ladite sonotrode et ledit outil (11).  In a known manner, the ultrasound assembly (E2) comprises a sonotrode (10) pressurized on a circular cutting tool (11). In the same way as for the assembly (E1), the sonotrode (10) and the circular cutting tool (11) are mounted on a support (12) shaped to allow the passage of tissue between said sonotrode and said tool ( 11).

Comme le montre notamment la figure 2, la molette (2) avec la roulette (5) et l'outil de coupe (11) sont assujettis, chacun, à un vérin (13) et (14) pour assurer la mise en pression par rapport à la sonotrode correspondante. La molette (2) et la roulette (5) avec leur vérin (13) et l'outil (11) avec son vérin (14), sont montés sur une platine support commune (15) pour constituer un ensemble indépendant. A noter que la roulette (5) et la molette (2) sont montées avec capacité de réglage en hauteur par rapport au tissu, en combinaison avec un élément de guidage (17).  As shown in particular in Figure 2, the wheel (2) with the wheel (5) and the cutting tool (11) are each subject to a cylinder (13) and (14) to ensure the pressurization by relative to the corresponding sonotrode. The wheel (2) and the wheel (5) with their cylinder (13) and the tool (11) with its cylinder (14), are mounted on a common support plate (15) to form an independent assembly. Note that the wheel (5) and the wheel (2) are mounted with height adjustment capacity relative to the fabric, in combination with a guide member (17).

Les avantages ressortent bien de la description, en particulier on souligne et on rappelle : - le laminage résultant de la roue et son motif en relief a pour effet de renforcer la lisière et d'éviter le roulage sur la largeur du motif ; - l'entraînement en rotation de la molette de laminage évite tout risque de bourrage entre ladite molette et la sonotrode, compte tenu de la structure maillée du tissu traité.  The advantages are apparent from the description, in particular it is emphasized and recalled: - the rolling resulting from the wheel and its pattern in relief has the effect of reinforcing the selvedge and avoid rolling over the width of the pattern; - The rotation drive of the rolling wheel avoids any risk of jamming between said wheel and the sonotrode, given the mesh structure of the treated fabric.

Dans une réalisation en variante, lorsque l'on veut réaliser simplement un motif sur un tissu lâche, le dispositif tel que décrit ne présente pas d'ensemble de coupe.  In an alternative embodiment, when it is desired to simply make a pattern on a loose fabric, the device as described does not have a cutting assembly.

Claims (4)

REVENDICATIONS - 1- Dispositif de coupe par ultrasons d'un tissu structuré en mailles, caractérisé en ce qu'il comprend, en alignement coaxial, un ensemble ultrasons (El) apte à réaliser une opération de laminage et un ensemble (E2) apte à réaliser une opération de coupe dans la lisière résultant dudit laminage au fur et à mesure du déplacement du tissu dont la vitesse est détectée par des moyens aptes à assurer un synchronisme avec l'opération de laminage. -  - 1 ultrasonic cutting device of a structured mesh fabric, characterized in that it comprises, in coaxial alignment, an ultrasound assembly (El) adapted to perform a rolling operation and a set (E2) capable of performing a cutting operation in the edge resulting from said rolling as the displacement of the fabric whose speed is detected by means able to ensure synchronism with the rolling operation. - 2- Dispositif selon la revendication 1, caractérisé en ce que l'ensemble ultrasons de laminage (El) comprend une sonotrode (1) mise en pression sur une molette motorisée (2) présentant périphériquement des aspérités, la vitesse du moteur d'entraînement (4) de la molette (2) étant synchronisé avec la vitesse de déplacement du tissu engagé entre la sonotrode (1) et la molette (2). -  2- Device according to claim 1, characterized in that the ultrasonic rolling assembly (El) comprises a sonotrode (1) pressurized on a motorized wheel (2) having peripheral roughness, the speed of the drive motor ( 4) of the wheel (2) being synchronized with the speed of movement of the tissue engaged between the sonotrode (1) and the wheel (2). - 3- Dispositif selon la revendication 2, caractérisé en ce que la synchronisation est réalisée au moyen d'une roulette (5), en contact avec le tissu et assujettie à un codeur incrémental (6) qui envoie, par l'intermédiaire d'un convertisseur (7), une consigne de vitesse à un variateur (8) qui commande le moteur d'entraînement de la molette. -  3- Device according to claim 2, characterized in that the synchronization is performed by means of a roller (5), in contact with the fabric and secured to an incremental encoder (6) which sends, via a converter (7), a variable speed controller (8) which controls the drive motor of the wheel. - 4- Dispositif selon les revendications 2 et 3, caractérisé en ce qu'un moyen (9) apte à régler la vitesse du moteur (4), est monté entre le convertisseur (7) et le variateur (8).-5- Dispositif selon la revendication 1, caractérisé en ce que l'ensemble ultrasons de coupe (E2) est un ensemble ultrasons qui comprend une sonotrode (10) mise en pression sur un outil de coupe circulaire (11). -6- Dispositif selon les revendications 1 et 5, caractérisé en ce que la molette de laminage (2) avec la roulette (5) et l'outil de coupe (11) sont assujettis, chacun, à un vérin (13) et (14) de mise en pression par rapport à la sonotrode correspondante (1) et (10). -7- Dispositif selon les revendications 1 à 6, caractérisé en ce que la molette de laminage (2) avec la roulette (5) et l'outil de coupe (11), avec leur vérin respectif (13) et (14), sont montés sur une platine support commune (15) pour constituer un ensemble indépendant.15  4- Device according to claims 2 and 3, characterized in that a means (9) adapted to adjust the speed of the motor (4), is mounted between the converter (7) and the variator (8) .- 5- Device according to claim 1, characterized in that the ultrasonic cutting assembly (E2) is an ultrasound assembly which comprises a sonotrode (10) pressurized on a circular cutting tool (11). -6- Device according to claims 1 and 5, characterized in that the rolling wheel (2) with the wheel (5) and the cutting tool (11) are each subject to a cylinder (13) and ( 14) pressurizing relative to the corresponding sonotrode (1) and (10). -7- Device according to claims 1 to 6, characterized in that the rolling wheel (2) with the roller (5) and the cutting tool (11), with their respective cylinder (13) and (14), are mounted on a common support plate (15) to constitute an independent assembly.
FR0754366A 2007-04-06 2007-04-06 Ultrasonic cutting device for fabric with structured stitching, comprises coaxially aligned, synchronized ultrasonic flattening and cutting units Pending FR2914577A1 (en)

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CN107313239A (en) * 2016-12-31 2017-11-03 莆田市坚强缝制设备有限公司 A kind of ship socks blanking machine
WO2020025494A1 (en) 2018-08-01 2020-02-06 Italia Technology Alliance S.R.L. Device and method for cutting a continuous web material into strips
CN113512872A (en) * 2021-07-13 2021-10-19 邓豪 Fixing and clamping device for fabric cutting
CN116103914A (en) * 2023-02-24 2023-05-12 苏州日月星辰静电净化技术有限公司 Ultrasonic slitting machine capable of exchanging wide and narrow sealing edges

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CN113512872A (en) * 2021-07-13 2021-10-19 邓豪 Fixing and clamping device for fabric cutting
CN113512872B (en) * 2021-07-13 2022-11-29 张珽 Fixing and clamping device for fabric cutting
CN116103914A (en) * 2023-02-24 2023-05-12 苏州日月星辰静电净化技术有限公司 Ultrasonic slitting machine capable of exchanging wide and narrow sealing edges

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