FR2537054A1 - WELDING AND CUTTING DEVICE FOR FILMS OF THERMOSOLDABLE PLASTICS - Google Patents

WELDING AND CUTTING DEVICE FOR FILMS OF THERMOSOLDABLE PLASTICS Download PDF

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Publication number
FR2537054A1
FR2537054A1 FR8220220A FR8220220A FR2537054A1 FR 2537054 A1 FR2537054 A1 FR 2537054A1 FR 8220220 A FR8220220 A FR 8220220A FR 8220220 A FR8220220 A FR 8220220A FR 2537054 A1 FR2537054 A1 FR 2537054A1
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France
Prior art keywords
jaw
films
jaws
parts
welding
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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
FR8220220A
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French (fr)
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Individual
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Individual
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Priority to FR8220220A priority Critical patent/FR2537054A1/en
Publication of FR2537054A1 publication Critical patent/FR2537054A1/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
    • 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
    • B29C65/745—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 a single unit having both a severing tool and a welding tool
    • B29C65/7451—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 a single unit having both a severing tool and a welding tool the severing tool and the welding tool being movable with respect to one-another
    • 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
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/14—Cutting, e.g. perforating, punching, slitting or trimming
    • 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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • 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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/30—Electrical means
    • B29C65/305—Electrical means involving the use of cartridge heaters
    • 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
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • 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
    • 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
    • B29C66/8122—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 composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • 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
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • 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
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91211—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods
    • B29C66/91212—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods involving measurement means being part of the welding jaws, e.g. integrated in the welding jaws
    • 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
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91231—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature of the joining tool
    • 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
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91421—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the joining tools
    • 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
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • B29C66/91651—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating
    • 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
    • B29C66/004—Preventing sticking together, e.g. of some areas of the parts to be joined
    • B29C66/0042—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined
    • 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
    • B29C66/71—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 composition of the plastics material of the parts to be joined
    • 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
    • B29C66/818—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8182—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the thermal insulating constructional aspects
    • B29C66/81821—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 cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the thermal insulating constructional aspects of the welding jaws
    • 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
    • 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
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
    • 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
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
    • B31B70/642—Uniting opposed surfaces or edges; Taping by applying heat or pressure using sealing jaws or sealing dies

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

According to the invention, the device comprises a welding press with two jaws 1, 3 each of which comprises two parts 6, 7, 13, 14, separated by a gap 4 or by a groove 12. The two parts 6, 7, of the jaw 1 carry supports made of silicone rubber 11 facing the flat ends of the parts 13, 14 of the jaw 3 heated by a heating device 16 controlled by a temperature-regulating probe 17 embedded in the jaw 3. A thermal insulator 15 which does not adhere to the plastic materials of the films 5 to be welded is housed in the groove 12 and has a U-shaped section in order that the end of a cutting blade 10, displaced in translation in the gap 4 may protrude into the groove 12 during the cutting of the films 5 between the two portions of the latter heat- welded between the compressed jaws 1, 3. Application to the manufacture of plastic bags.

Description

Dispositif de soudage et de coupe de films de matières
plastiques thermosoudables
La présente invention concerne des dispositifs de soudage et de coupe de films de matières plastiques thermosoudables que comprennent les installations de fabrication de sachets, sacs et manchons en matières plastiques notamment, et qui sont utilisées en particulier dans les industries de l'emballage et du conditionnement.Device for welding and cutting films of materials
heat sealable plastics
The present invention relates to devices for welding and cutting films of heat-sealable plastics which include installations for the production of sachets, bags and sleeves of plastics in particular, and which are used in particular in the packaging industries .

L'invention se rapporte plus précisément aux dispositifs de soudage et de coupe qui comprennent
- une presse de soudage, munie de deux mors ou mâchoires métalliques mobiles l'un par rapport a lgautre, et destinés à être rapprochés et appliqués l'un contre l'autre puis écartés l'un de l'autre cycliquement, dans une direction sensiblement perpendiculaire a une direction de défilement cyclique d'au moins deux films de matières plastiques thermosoudables qui passent entre les mors, et dont chacun des mors présente, par rapport au sens de défilement des films, une partie antérieure et une partie postérieure séparées l'une de l'autre par un intervalle,
- une tête de soudage antérieure et une
tête de soudage postérieure, sensiblement transversales, dont chacune comprend un organe chauffant à face plane s'étendant dans une direction sensiblement perpendiculaire aux directions respectivement de déplacement des mors et de défilement des films, et est solidaire de la partie antérieure ou postérieure correspondante d'un mors, et se trouve appliqué par ladite face plane contre une face plane d'un support en caoutchouc de silicone solidaire de la partie antérieure ou postérieure correspondante de l'autre mors, lorsque les deux mors sont appliqués l'un contre l'autre, afin de souder les films, et
- un organe de coupe des films, disposé au repos dans l'intervalle délimité entre les deux parties d'un mors et déplacé cycliquement, parallèlement à luimême, dans une direction sensiblement parallèle a la direc tion de déplacement des mors, entre les deux têtes de soudage par un mécanisme de translation en va-et-vient, de manière à couper les films entre les deux têtes de soudage
On connaît déjà des dispositifs de soudage et de coupe de ce type, dans lesquels l'organe chauffant de chaque tête de soudage est constitué par une résistance électrique en forme de ruban chauffant, fixée sur une face plane d'un support en caoutchouc de silicone qui est tournée vers la face plane du support de la partie correspondante de l'autre mors.Le ruban chauffant et le support sur lequel le ruban est fixé sont attachés à une extrémité d'une partie d'un mors et recouverts, ainsi que cette extré- m , d'une gaine protectrice de polytétrafluoréthylène, or e, qui qui é la fusion des films par -contact direct des résistances avec eux ; une gaine analogue recouvre également le support en caoutchouc de silicone et l'extrémité à laquelle il est attaché sur la partie correspondante de l'autre mors.The invention relates more specifically to welding and cutting devices which comprise
- a welding press, provided with two metal jaws or jaws movable relative to one another, and intended to be brought closer and applied one against the other then separated from one another cyclically, in a direction substantially perpendicular to a direction of cyclic travel of at least two films of heat-sealable plastics which pass between the jaws, and each of the jaws of which, relative to the direction of travel of the films, has a front part and a rear part separated one from the other by an interval,
- an anterior welding head and a
posterior welding head, substantially transverse, each of which comprises a heating member with a flat face extending in a direction substantially perpendicular to the directions of movement of the jaws and of film travel respectively, and is integral with the corresponding front or rear part of a jaw, and is applied by said flat face against a flat face of a silicone rubber support integral with the corresponding front or rear part of the other jaw, when the two jaws are applied against each other , in order to weld the films, and
- a film cutting member, arranged at rest in the interval delimited between the two parts of a jaw and moved cyclically, parallel to itself, in a direction substantially parallel to the direction of movement of the jaws, between the two heads welding by a reciprocating translation mechanism, so as to cut the films between the two welding heads
Welding and cutting devices of this type are already known, in which the heating element of each welding head is constituted by an electrical resistance in the form of a heating tape, fixed on a flat face of a support made of silicone rubber. which faces towards the flat face of the support of the corresponding part of the other jaw. The heating tape and the support on which the ribbon is fixed are attached to one end of a part of a jaw and covered, as well as this extreme, of a protective sheath of polytetrafluoroethylene, gold, which which melts the films by direct contact of the resistors with them; a similar sheath also covers the silicone rubber support and the end to which it is attached to the corresponding part of the other jaw.

Ces réalisations ont pour désavantages que ces gaines vieillissent relativement vite en service, notamment du fait de la source de chaleur relativement concentrée que constituent les résistances électriques en forme de ruban chauffant des têtes de soudage, et que ces résistances sont enfoncées dans les supports en caoutchouc de silicone auxquels elles sont fixées, à la suite des nombreuses compressions successives des mors de la presse l'un contre l'autre1 ce qui endommage les têtes de soudage et altère leur fonctionnement. De plus, en raison de la dilatation thermique qu'elles- subissent, ces résistances électriques en forme de ruban chauffant se détériorentsen particulier a leurs extrémités transversales. The disadvantages of these embodiments are that these sheaths age relatively quickly in service, in particular due to the relatively concentrated heat source constituted by the electrical resistors in the form of a heating tape for the welding heads, and that these resistors are pressed into the rubber supports. silicone to which they are attached, following numerous successive compressions of the jaws of the press against each other1 which damages the welding heads and impairs their operation. In addition, due to the thermal expansion which they undergo, these electrical resistances in the form of a heating tape deteriorate, in particular at their transverse ends.

Par ailleurs, l'organe de coupe,qui équipe les dispositifs connus de ce type, est souvent un élément chauffant filiforme, tel qu'une résistance électrique en forme de fil, qui s'étend transversalement et sensiblement parallèlement aux films, et qui vient couper ces derniers par fusion entre les deux têtes de soudage. Ceci a pour inconvénients de produire des gaz qui proviennent de la décomposition à la chaleur et de la fusion des matières plastiques. De plus, le fil chauffant se salit et serecou- vre de résidus de décomposition et de combustion de ces matières plastiques, ce qui émousse sa capacité de coupe et finit par provoquer sa rupture. Furthermore, the cutting member, which equips known devices of this type, is often a filiform heating element, such as an electrical resistance in the form of a wire, which extends transversely and substantially parallel to the films, and which comes cut these by fusion between the two welding heads. This has the disadvantage of producing gases which result from heat decomposition and the melting of plastics. In addition, the heating wire gets dirty and is covered with decomposition and combustion residues from these plastics, which dulls its cutting capacity and eventually causes it to break.

Par la présente invention, on se propose de remédier à ces divers inconvénients, et 1 t invention a pour objet un dispositif du type précité dans lequel l'organe chauffant de chaque tête de soudage assure un chauffage régulièrement réparti. By the present invention, it is proposed to remedy these various drawbacks, and 1 t invention relates to a device of the aforementioned type in which the heating member of each welding head provides regularly distributed heating.

L'invention a également pour but un dispositif du type précité dans lequel l'organe chauffant de chaque tête de soudage n'est pas susceptible d'entraîner la fusion des films de matières plastiques par contact direct, et n'a pas besoin d'être protégé par une gaine. Another object of the invention is a device of the aforementioned type in which the heating member of each welding head is not likely to cause the plastic films to melt by direct contact, and does not need to be protected by a sheath.

L'invention a encore pour but un dispositif du type précité, dont les têtes de soudage ne sont pas susceptibles de s'endommager par l'enfoncement de leur organe chauffant dans un support. Another object of the invention is a device of the aforementioned type, the welding heads of which are not liable to be damaged by the insertion of their heating member into a support.

Un autre but de l'invention est de concevoir un dispositif du type précité qui n'est pas sali à l'usage par les dépôts et/ou la solidarisation de bavures de matieres plastiques occasionnés par la coupe ou le soudage des films. Another object of the invention is to design a device of the aforementioned type which is not soiled for use by deposits and / or the joining of plastic burrs caused by the cutting or welding of the films.

Enfin, l'invention a également pour but un dispositif du type précité comportant un organe de coupe bien moins fragile que ceux qui équipent les dispositifs de l'état de la technique. Finally, the invention also aims a device of the aforementioned type comprising a cutting member much less fragile than those which equip the devices of the prior art.

A cet effet, le dispositif selon l'invention, du type précité, se caractérise par le fait que chaque organe chauffant est constitué directement par la partie métallique correspondante d'un mors, ce qui assure une bonne indéformabilité de la tête de soudure correspondante, et une bonne répartition de la chaleur non seulement dans la partie métallique du mors mais également dans les portions de films qui v#iennent au contact de la face plane d'appui de la partie métallique correspondante. To this end, the device according to the invention, of the aforementioned type, is characterized in that each heating member is formed directly by the corresponding metal part of a jaw, which ensures good deformability of the corresponding welding head, and a good distribution of heat not only in the metallic part of the jaw but also in the portions of films which come into contact with the flat support face of the corresponding metallic part.

Dans une forme de réalisation avantageuse par sa simplicité de réalisation, les deux parties métalliques qui constituent les organes chauffants des deux têtes de soudage sont délimitées sur un premier mors par une gorge sensiblement transversale que présente l'extrémité de ce premier mors qui est tournée vers le second mors et dont la section est, de préférence, sensiblement trapézoidale parallèlement à la direction de défilement des films. In an advantageous embodiment by its simplicity of embodiment, the two metal parts which constitute the heating elements of the two welding heads are delimited on a first jaw by a substantially transverse groove which has the end of this first jaw which is turned towards the second jaw and whose section is preferably substantially trapezoidal parallel to the direction of travel of the films.

De préférence, afin d'empêcher le dépôt de salissures ou de bavures provenant de la décomposition des matières plastiques des films à la chaleur, entre les deux têtes de soudage, la face plane de chaque partie du premier mors, qui est tournée vers le support en caoutchouc de silicone de la partie correspondante du second mors, se prolonge vers la gorge qui sépare les deux parties du premier mors par une face d'un isolant. thermique antiadhérent vis-à-vis des matières plastiques des films. Preferably, in order to prevent the deposition of dirt or burrs originating from the decomposition of the plastic materials of the films with heat, between the two welding heads, the flat face of each part of the first jaw, which faces the support. made of silicone rubber of the corresponding part of the second jaw, extends towards the groove which separates the two parts of the first jaw by one face of an insulator. thermal non-stick vis-à-vis the plastic materials of the films.

De même, afin d'empêcher des dépôts analogues dans la gorge, les faces tournées l'une vers l'autre des deux parties du premier mors sont également revêtues d'un isolant thermique anti-adhérent vis-à-vis des matières plastiques des films. Likewise, in order to prevent similar deposits in the groove, the faces facing one another of the two parts of the first jaw are also coated with a non-stick thermal insulator against the plastics of the movies.

Selon un exemple de réalisation avantageux sur le plan de la simplicité des la structure, l'isolant thermique anti-adhérent se présente sous la forme d'un élément transversal de section sensiblement en forme de
U disposé dans la gorge du premier mors et qui s'ouvre en direction de l'intervalle qui sépare les parties du second mors, et cet isolant thermique anti-adhérent est de préférence un stratifié de verre et de polytétrafluoroé thylène.According to an advantageous embodiment in terms of the simplicity of the structure, the non-stick thermal insulation is in the form of a transverse element of section substantially in the form of
U arranged in the groove of the first jaw and which opens in the direction of the gap which separates the parts of the second jaw, and this non-stick thermal insulation is preferably a laminate of glass and polytetrafluoroethylene thylene.

De même, afin de simplifier encore la#struc- ture et donc de diminuer les coûts de fabrication, le premier mors est un bloc métallique, de préférence en aluminium, dans lequel est noyé un dispositif de chauffage, comprenant de préférence au moins une résistance électrique chauffante, et une sonde de régulation en température des têtes de soudage est également noyée dans le premier mors, de préférence entre le dispositif de chauffage et la gorge, de sorte que les organes chauffants des têtes de soudage ainsi réalisés ne peuvent entraîner la fusion des films de matières plastiques par contact direct avec ces derniers et n'ont pas besoin d'être protégés par des gaines en polytétrafluoroéthylène. Similarly, in order to further simplify the # structure and therefore reduce manufacturing costs, the first jaw is a metal block, preferably made of aluminum, in which is embedded a heating device, preferably comprising at least one resistance electric heater, and a temperature regulation probe for the welding heads is also embedded in the first jaw, preferably between the heating device and the groove, so that the heating members of the welding heads thus produced cannot cause fusion plastic films by direct contact with them and do not need to be protected by polytetrafluoroethylene sheaths.

Afin de protéger les supports en caoutchouc de silicone, qui coopèrent avec les faces planes chauffantes de la zone de soudage des parties du premier mors, ces deux supports sont fixés chacun dans une rainure d'une partie du second mors, de manière d'une part à délimiter l'intervalle entre les deux parties de ce second mors et d'autre part à venir légèrement en saillie vers le premier mors par rapport à la face de la partie correspondante du second mors qui est tournée vers le premier. In order to protect the silicone rubber supports, which cooperate with the planar heating surfaces of the welding area of the parts of the first jaw, these two supports are each fixed in a groove of a part of the second jaw, so as to part to delimit the interval between the two parts of this second jaw and on the other hand to slightly protrude towards the first jaw relative to the face of the corresponding part of the second jaw which is turned towards the first.

Selon l'invention, et afin d'éviter tout risque de rupture de l'organe de coupe, ce dernier est une lame de coupe, de préférence en acier, dont l'extrémité qui vient couper les films est de préférence munie de-dents. According to the invention, and in order to avoid any risk of rupture of the cutting member, the latter is a cutting blade, preferably made of steel, the end of which cuts the films is preferably provided with teeth .

Dans l'exemple préféré de réalisation, cette lame de coupe est guidée dans l'intervalle qui sépare les deux parties du second mors, de sorte que son extrémité qui coupe les films vienne en saillie dans la gorge du premier mors lors de la coupe, alors que les films sont immobilisés par pincement entre les deux mors. In the preferred embodiment, this cutting blade is guided in the interval which separates the two parts of the second jaw, so that its end which cuts the films protrudes into the groove of the first jaw during cutting, while the films are immobilized by pinching between the two jaws.

Pour mieux faire comprendre l'objet de lrin- vention, on va en décrire maintenant, à titre d'exemple illustratif, un mode de réalisation représenté sur l'unique figure annexée, qui est une vue en coupe verticale, parallèlement à la direction de défilement des films de matières plastiques thermosoudables, d'un dispositif de soudage et de coupe selon l'invention. To better understand the object of the invention, we will now describe, by way of illustrative example, an embodiment shown in the single appended figure, which is a view in vertical section, parallel to the direction of scrolling of films of heat-sealable plastics, of a welding and cutting device according to the invention.

En référence à la figure unique, le dispositif comprend une presse de soudage verticale comportant un mors supérieur 1, déplacé verticalement par un vérin hydraulique ou pneumatique 2 et guidé sur un bâti (non représenté), afin d'être rapproché et appliqué contre un mors inférieur fixe 3, puis d'être écarté cycliquement de ce dernier.Le mors supérieur 1 est constitué par un bloc parallélépipédique d'aluminium divisé en deux parties sensiblement identiques et disposées sensiblement parallèlement l'une à l'autre par un intervalle 4, qui s'étend transversalement par rapport à la direction de défilement de deux films de matières plastiques thermosoudables 5, par exemple en polyéthylène, en chlorure de polyvinyle, en polypropylène, etc., de 10 à 150 oum d'épaisseur, qui passent entre les mors 1 et 3 et sont cycliquement avancés d'une certaine longueur, sensiblement en direction horizontale, dans le sens indiqué par la flèche F. L'intervalle 4 s'étend transversalement sur une distance légèrement supérieure à la largeur des films 5 et sépare donc une partie antérieure 6 du mors supérieur 1 d'une partie postérieure 7 de ce même mors 1. Referring to the single figure, the device comprises a vertical welding press comprising an upper jaw 1, moved vertically by a hydraulic or pneumatic cylinder 2 and guided on a frame (not shown), so as to be brought closer and applied against a jaw fixed lower 3, then to be separated cyclically from the latter. The upper jaw 1 is constituted by a parallelepipedal aluminum block divided into two substantially identical parts and arranged substantially parallel to each other by an interval 4, which extends transversely to the direction of travel of two films of heat-sealable plastic materials 5, for example polyethylene, polyvinyl chloride, polypropylene, etc., 10 to 150 μm thick, which pass between the jaws 1 and 3 and are cyclically advanced by a certain length, substantially in the horizontal direction, in the direction indicated by the arrow F. The interval 4 extends transversely over a slight distance ment greater than the width of the films 5 and therefore separates a front part 6 of the upper jaw 1 from a rear part 7 of this same jaw 1.

Dans la partie médiane supérieure du mors 1 est aménagé un logement dans lequel est maintenu le cylindre d'un vérin hydraulique ou pneumatique, représenté schématiquement et désigné d'une manière générale par la référence 8, dont la tige entraîne en translation verticale selon un mouvement cyclique de va-et-vient,un uncoulisseau 9 monté coulissant dans l'intervalle 4 et auquel est fixée l'extrémité supérieure d'une lame de coupe transversale 10, en acier, qui s'étend sur toute la dimension transver sale de l'intervalle 4
En position de repos de la lame de coupe 10, dans laquelle le coulisseau 9 est remonté dans la partie supérieure de l'intervalle 4 par le vérin 8, l'extrémité inférieure de cette lame 10, qui présente des dents délimitées dans la partie d'extrémité inférieure biseautée par des pans inclinés selon des angles différents, est protégée dans la partie inférieure de l'intervalle 4 entre deux supports en caoutchouc de silicone 11.In the upper middle part of the jaw 1 is housed a housing in which is held the cylinder of a hydraulic or pneumatic cylinder, represented schematically and generally designated by the reference 8, the rod of which drives in vertical translation according to a movement cyclic back and forth, a uncissor 9 slidably mounted in the gap 4 and to which is fixed the upper end of a transverse cutting blade 10, of steel, which extends over the whole dimension of the dirty cross '' interval 4
In the rest position of the cutting blade 10, in which the slide 9 is raised in the upper part of the interval 4 by the jack 8, the lower end of this blade 10, which has teeth delimited in the part d the lower end bevelled by sides inclined at different angles, is protected in the lower part of the gap 4 between two silicone rubber supports 11.

Ces supports 11, de forme parallélépipédique allongée, sont disposés transversalement et fixés chacun dans une rainure usinée à angle droit dans le coin inférieur qui borde l'intervalle 4 de l'une des parties antérieure 6 et postérieure 7. Chaque support 11 présente une face plane tournée vers la face plane en regard de l'autre support 11, et qui vient dans le prolongement de la face plane délimitant l'intervalle 4 de la partie 6 ou 7 à laquelle ce support 11 est fixé. La face de chaque support 11 tournée vers le mors inférieur 3 est plane et légèrement en saillie vers le mors inférieur 3 par rapport a la face plane de l'extrémité inférieure de la partie 6 ou 7 correspondante. These supports 11, of elongated parallelepiped shape, are arranged transversely and each fixed in a groove machined at right angles in the lower corner which borders the gap 4 of one of the front 6 and posterior parts 7. Each support 11 has a face plane facing the planar face opposite the other support 11, and which comes in the extension of the planar face defining the gap 4 of the part 6 or 7 to which this support 11 is fixed. The face of each support 11 facing the lower jaw 3 is flat and slightly projecting towards the lower jaw 3 relative to the flat face of the lower end of the corresponding part 6 or 7.

Le mors inférieur 3 est un bloc massif et de forme parallélépipédique d'aluminium, dont l'extrémité supérieure a été usinée de façon à présenter, dans la direction de défilement des films 5, une section en forme de trapèze isocèle, et dans laquelle a été usinée une gorge transversale 12, qui débouche dans la petite base de la section transversale, symétriquement par rapport à la média trice de cette petite base, de façon à délimiter sur le mors inférieur 3 une partie antérieure 13 et une partie postérieure 14, respectivenoet en regard de la partie anté- rieure 6 et de la partie posterieure 7 du mors supérieur 1. The lower jaw 3 is a solid block of parallelepipedal shape of aluminum, the upper end of which has been machined so as to present, in the direction of travel of the films 5, a section in the form of an isosceles trapezoid, and in which a been machined a transverse groove 12, which opens into the small base of the cross section, symmetrically with respect to the trice media of this small base, so as to delimit on the lower jaw 3 an anterior part 13 and a posterior part 14, respectivenoet opposite the front part 6 and the rear part 7 of the upper jaw 1.

Chaque partie 13 et 14 présente à son extrémité supérieure une face plane transversale tournée vers la face plane du support Il de la partie 6 ou 7 correspon dante et qui est en saillie par rapport à la face plane d'extrémité inférieure de cette dernière. Each part 13 and 14 has at its upper end a transverse flat face turned towards the flat face of the support II of the corresponding part 6 or 7 and which projects from the flat end face of the latter.

Un élément transversal 15, de section en forme de U, dont les ailes ont des faces internes et externes parallèles entre elles et perpendiculaires aux faces interne et externe de la base, est fixé dans la gorge12, de sorte qu'il s'ouvre en direction de 11 intervalle 4 du mors supérieur 1. Cet élément 15 est un isolant thet- mique anti-adhérent vis-à-vis des matières plastiques des films 5, par exemple un stratifié de verre et de polytétrafluoroéthylène commercialé par la Société Du Pont de Nemours sous la marque FLUORGLAS" .Cet élément 15 est ainsi dimensionné et conformé que les faces planes d'extrémité des ailes de la section en U se trouvent dans le prolongement des faces planes de l'extrémité supérieure des parties antérieure 13 et postérieure 14 du mors inférieur 3, et que les faces planes intérieures des ailes de la section en U se trouvent dans le prolongement des faces des parties 6 et 7 du mors supérieur 1 et des supports 11 qui délimitent l'intervalle 4. A transverse element 15, of U-shaped section, the wings of which have internal and external faces parallel to one another and perpendicular to the internal and external faces of the base, is fixed in the groove 12, so that it opens in direction of the interval 11 of the upper jaw 1. This element 15 is a non-stick thermal insulator with respect to the plastics of the films 5, for example a laminate of glass and polytetrafluoroethylene sold by the Du Pont Company. Nemours under the mark FLUORGLAS ".This element 15 is thus dimensioned and shaped so that the plane end faces of the wings of the U-shaped section are in line with the plane faces of the upper end of the front 13 and rear 14 parts of the lower jaw 3, and that the inner flat faces of the wings of the U-shaped section are in line with the faces of the parts 6 and 7 of the upper jaw 1 and of the supports 11 which delimit the gap 4.

De plus, un dispositif de chauffage 16, comprenant des résistances électriques de chauffage, est noyé dans la partie centrale du bloc d'aluminium du mors inférieur 3, et assure un chauffage quasiment uniforme de ce dernier, et donc également des parties antérieure 13 et postérieure 14 qui constituent les éléments chauffants de deux têtes de soudage (une tête antérieure et une tête postérieure) réalisées en coopération avec les supports 11. In addition, a heating device 16, comprising electrical heating resistors, is embedded in the central part of the aluminum block of the lower jaw 3, and provides an almost uniform heating of the latter, and therefore also of the front parts 13 and posterior 14 which constitute the heating elements of two welding heads (an anterior head and a posterior head) produced in cooperation with the supports 11.

Enfin, une sonde de température 17, également noyée dans le bloc d'aluminium du mors 3, entre le dispositif de chauffage 16 et la gorge 12, détecte la température dans le mors 3 et commande, de façon en soi connue, l'alimentation des résistances électriques du dispositif de chauffage 16, afin que la température dans les zones de soudage délimitées par les faces supérieures des parties 13 et 14, ne soit pas élevée au point de provoquer la destruction ou coupure par fusion des films 5, lorsque, par l'action du vérin 2, le mors supérieur 1 est descendu et appliqué par la face inférieure de ses supports 11 contre les films 5 eux-mêmes appliqués et ainsi pincés contre les zones de soudage des parties 13 et 14 du mors inférieur 3. Finally, a temperature probe 17, also embedded in the aluminum block of the jaw 3, between the heating device 16 and the groove 12, detects the temperature in the jaw 3 and controls, in a manner known per se, the supply electrical resistances of the heating device 16, so that the temperature in the welding zones delimited by the upper faces of the parts 13 and 14, is not so high as to cause the destruction or cutting by fusion of the films 5, when, by the action of the jack 2, the upper jaw 1 is lowered and applied by the lower face of its supports 11 against the films 5 themselves applied and thus pinched against the welding zones of the parts 13 and 14 of the lower jaw 3.

On obtient ainsi des soudures nettes, régu- lières, et reproductibles presque indéfiniment, sans risque notable de détérioration des éléments chauffants des têtes de soudage ainsi réalisées Les supports 11 sont fixés aux parties 6 et 7 par deux faces perpendiculaires et ne sont donc pas cisaillés par les extrémités supérieures des parties 13 et 14 et les ailes de l'élément en U 15 lors des compressions des deux mors 1 et 3 l'un contre l'autre, ce qui accroît leur longévité. L'élément antiadhérent 15 empêche tout dépôt et toute solidarisation entre les deux têtes de soudage, de bavures ou de fragments de matières plastiques des films 5 résultant du soudage ou de la coupe exécutée par la lame de coupe 10, qui est descendue par le vérin 8 jusqu'à ce que l'extrémité infé- rieure de la lame 10 vienne en saillie dans la gorge 12, alors que les films 5 sont pincés entre les deux mors 1 et 3
Il est bien entendu que le dispositif cidessus décrit pourra donner lieu à toutes modifications désirables sans sortir pour cela du cadre de l'invention. This gives clear, regular welds that can be reproduced almost indefinitely, without any significant risk of damaging the heating elements of the welding heads thus produced. The supports 11 are fixed to parts 6 and 7 by two perpendicular faces and are therefore not sheared. by the upper ends of the parts 13 and 14 and the wings of the U-shaped element 15 when the two jaws 1 and 3 are compressed against each other, which increases their longevity. The non-stick element 15 prevents any deposit and any joining between the two welding heads, of burrs or fragments of plastic material of the films 5 resulting from the welding or the cutting carried out by the cutting blade 10, which is lowered by the jack. 8 until the lower end of the blade 10 protrudes into the groove 12, while the films 5 are clamped between the two jaws 1 and 3
It is understood that the device described above may give rise to any desirable modifications without departing from the scope of the invention.

Claims (11)

REVENDICATIONS 1. Dispositif de soudage et de coupe de films (5) de matières plastiques thermosoudables, comprenant 1. Device for welding and cutting films (5) of heat-sealable plastics, comprising - une presse de soudage, munie de deux mors (1,3) métalliques mobiles l'un par rapport à l'autre, et destinés à être rapprochés et appliqués l'un contre l'autre puis écartés l'un de l'autre cycliquement, dans une direction sensiblement perpendiculaire à une direction de défilement cyclique d'au moins deux films (5) de matières plastiques thermosoudables qui passent entre les mors (1,3), et dont chacun des mors présente, par rapport au sens de défilement (F) des films (5), une partie antérieure (6,13) et une partie postérieure (7,14) séparées l'une de l'autre par un intervalle (4,12),  - a welding press, provided with two metal jaws (1,3) movable with respect to each other, and intended to be brought together and applied one against the other then separated from one another cyclically, in a direction substantially perpendicular to a direction of cyclic travel of at least two films (5) of heat-sealable plastics which pass between the jaws (1,3), and each of the jaws of which presents, relative to the direction of travel (F) films (5), an anterior part (6.13) and a posterior part (7.14) separated from each other by an interval (4.12), - une tête de soudage antérieure et une tête de soudage postérieure, sensiblement transversales, dont chacune comprend un organe chauffant (13,14) à face plane s'étendant dans une direction sensiblement perpendiculaire aux directions respectivement de déplacement des mors (1,3) et de défilement des films (5) et qui est solidaire de la partie antérieure (13) ou postérieure (14) correspondante d'un mors (3), et se trouve appliquée par ladite face plane contre une face plane d'un s#upport en caoutchouc de silicone (11) solidaire de la partie antérieure (6) ou postérieure (7) correspondante de l'autre mors (1), lorsque les deux mors (1,3) sont appliqués l'un contre l'autre, afin de souder les films (5), et - an anterior welding head and a posterior welding head, substantially transverse, each of which comprises a heating member (13, 14) with a planar face extending in a direction substantially perpendicular to the directions of displacement of the jaws (1,3) respectively and of the film running (5) and which is integral with the corresponding front (13) or rear (14) part of a jaw (3), and is applied by said flat face against a flat face of an s # upport in silicone rubber (11) integral with the corresponding front (6) or posterior (7) part of the other jaw (1), when the two jaws (1,3) are applied against each other, in order to weld the films (5), and - un organe de coupe (10) des films (5) disposé au repos dans l'intervalle (4) délimité entre les deux parties (6,7) d'un mors (1) et déplacé cycliquement parallèlement à lui-même, dans une direction sensiblement parallèle à la direction de déplacement des mors (1,3), entre les deux têtes de soudage par un mécanisme de translation en va-et-vient, de manière à couper les films (5) entre les deux têtes de soudage, caractérisé par le fait que chaque organe chauffant est constitué directement par la partie métallique correspondante (13,14) d'un mors (3). - a film cutting member (10) (5) disposed at rest in the interval (4) delimited between the two parts (6,7) of a jaw (1) and cyclically displaced parallel to itself, in a direction substantially parallel to the direction of movement of the jaws (1,3), between the two welding heads by a reciprocating translation mechanism, so as to cut the films (5) between the two welding heads , characterized in that each heating element is formed directly by the corresponding metal part (13,14) of a jaw (3). 2. Dispositif selon la revendication 1, caractérisé par le fait que les deux parties métalliques (13,14) qui constituent les organes chauffants des deux tête de soudage sont délimités sur un premier mors (3) par une gorge (12) sensiblement transversale que présente l'extrémité de ce premier mors (3) qui est tournée vers le second mors (1) et dont la section est, de préférence, sensiblement trapézoidale parallèlement à la direction de défilement des films (5). 2. Device according to claim 1, characterized in that the two metal parts (13,14) which constitute the heating elements of the two welding heads are delimited on a first jaw (3) by a groove (12) substantially transverse that has the end of this first jaw (3) which faces the second jaw (1) and the section of which is preferably substantially trapezoidal parallel to the direction of travel of the films (5). 3. Dispositif selon la revendication 2, carac terse par le fait que la face plane de chaque partie (13, 14) du premier mors (3) qui est tournée vers le support en caoutchouc de silicone (11) de la partie in,7) correspondante du second mors (1), se prolonge vers la gorge (12) qui sépare les deux parties (13,14) du premier mors (3) par une face d'un isolant thermique anti-adhérent (15) vis-à-vis des matières plastiques des films (5). 3. Device according to claim 2, charac terse in that the flat face of each part (13, 14) of the first jaw (3) which faces the silicone rubber support (11) of the in part, 7 ) corresponding to the second jaw (1), extends towards the groove (12) which separates the two parts (13,14) of the first jaw (3) by one face of a non-stick thermal insulator (15) opposite - screws of plastic films (5). 4. Dispositif selon l'une des revendications 2 et 3, caractérisé par le fait que les faces tournées lsune vers l'autre des deux-parties (13,14) du premier mors (3) sont revêtues d'un isolant thermique anti-adhérent (15) vis-à-vis des matières plastiques des films (5)  4. Device according to one of claims 2 and 3, characterized in that the faces turned towards one another of the two parts (13,14) of the first jaw (3) are coated with an anti-thermal insulator adherent (15) vis-a-vis plastics of films (5) 5. Dispositif selon la revendication 4, telle que rattachée à la revendication 3, caractérisé par le fait que l'isolant thermique anti-adhErent (15) se présente sous la forme d'un élément transversal dé section sensiblement en forme de U, disposé dans la gorge (12) du premier mors (3) et qui s'ouvre en direction de l'intervalle (4) qui sépare les parties (6,7) du second mors (1). 5. Device according to claim 4, as attached to claim 3, characterized in that the anti-adhErent thermal insulation (15) is in the form of a transverse element of substantially U-shaped section, arranged in the groove (12) of the first jaw (3) and which opens in the direction of the gap (4) which separates the parts (6,7) of the second jaw (1). 6. Dispositif selon l'une des #evendications 3 à 5, caractérisé par le fait que l'isolant thermique anti-adhérent (15) est un stratifié de verre et de poly tétrafluoroêthylène.  6. Device according to one of #evendications 3 to 5, characterized in that the non-stick thermal insulation (15) is a laminate of glass and poly tetrafluoroethylene. 7. Dispositif selon l'une des revendications 2 à 6, caractérisé par le fait que le premier mors (3) est un bloc métallique, de préférence d'aluminium, dans lequel est noyé un dispositif de chauffage (16), de préférence comprenant au moins une résistance électrique chauffante. 7. Device according to one of claims 2 to 6, characterized in that the first jaw (3) is a metal block, preferably of aluminum, in which is embedded a heating device (16), preferably comprising at least one electric heating resistance. 8. Dispositif selon la revendication 7, caractérisé par le fait qu'une sonde de régulation (17) de la température des têtes de soudage est également noyée dans le premiers mors (3), de préférence entre le dispositif de chauffage.(16) et la gorge (12).  8. Device according to claim 7, characterized in that a regulation probe (17) of the temperature of the welding heads is also embedded in the first jaws (3), preferably between the heating device. (16) and the throat (12). 9. Dispositif selon l'une des revendications 2 à 8, caractérisé par le fait que les deux supports en caoutchouc de silicone (11) sont fixés chacun dans une rainure d'une partie (6,7) du second mors (1) de manière d'une part à délimiter l'intervalle (4) entre les deux parties (6,7) de ce second mors (1) et d'autre part à venir légèrement en saillie vers le premier mors (3) par rapport à la face de la partie correspondante (6,7) du second mors (1) qui est tournée vers le premier (3). 9. Device according to one of claims 2 to 8, characterized in that the two silicone rubber supports (11) are each fixed in a groove of a part (6,7) of the second jaw (1) of on the one hand to delimit the interval (4) between the two parts (6,7) of this second jaw (1) and on the other hand to come slightly projecting towards the first jaw (3) relative to the face of the corresponding part (6,7) of the second jaw (1) which faces the first (3). 10. Dispositif selon l'une des revendications l à 9, caractérisé par le fait que l'organe de coupe est une lame de coupe (10), dont l'extrémité qui vient couper les films (5) est de préférence munie de dents. 10. Device according to one of claims l to 9, characterized in that the cutting member is a cutting blade (10), the end of which comes to cut the films (5) is preferably provided with teeth . 11. Dispositif selon la revendication 10, telle que rattachée à l'une des revendications 2 à 9, caractérisé par le fait que la lame de coupe (10) est guidée (9) dans l'intervalle (4) qui sépare les deux parties (6,7) du second mors (1) de sorte que son extrémité qui coupe les films (5) vienne en saillie dans la gorge (12) du premier mors (3), lors de la coupe alors que les films (5) sont immobilisés par pincement entre les deux mors (1,3 > .  11. Device according to claim 10, as attached to one of claims 2 to 9, characterized in that the cutting blade (10) is guided (9) in the gap (4) which separates the two parts (6,7) of the second jaw (1) so that its end which cuts the films (5) protrudes into the groove (12) of the first jaw (3), when cutting while the films (5) are immobilized by pinching between the two jaws (1.3>.
FR8220220A 1982-12-02 1982-12-02 WELDING AND CUTTING DEVICE FOR FILMS OF THERMOSOLDABLE PLASTICS Pending FR2537054A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8220220A FR2537054A1 (en) 1982-12-02 1982-12-02 WELDING AND CUTTING DEVICE FOR FILMS OF THERMOSOLDABLE PLASTICS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8220220A FR2537054A1 (en) 1982-12-02 1982-12-02 WELDING AND CUTTING DEVICE FOR FILMS OF THERMOSOLDABLE PLASTICS

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FR2537054A1 true FR2537054A1 (en) 1984-06-08

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2345533A1 (en) * 2008-09-16 2011-07-20 Unicharm Corporation Perforation forming device
CN107839297A (en) * 2016-09-18 2018-03-27 曼胡默尔滤清器（上海）有限公司 Filter core paper folder device with wave welding head of ultrasonic wave tape edge structure
CN109649714A (en) * 2019-02-28 2019-04-19 国信电子票据平台信息服务有限公司 Film wrapping machine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1515165A (en) * 1967-01-12 1965-03-01 Further training in machines for welding thermoplastic materials
DE1205886B (en) * 1959-09-16 1965-11-25 Nat Dairy Prod Corp Packaging machine for tubular packaging
DE1952752A1 (en) * 1969-10-20 1971-04-29 Gloucester Eng Co Inc Hot-welding device
FR2178179A1 (en) * 1972-03-29 1973-11-09 Iwema Forpacknings Ab
US3943686A (en) * 1974-09-05 1976-03-16 Fmc Corporation Wrapping machine with severing blade in crimping head

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1205886B (en) * 1959-09-16 1965-11-25 Nat Dairy Prod Corp Packaging machine for tubular packaging
FR1515165A (en) * 1967-01-12 1965-03-01 Further training in machines for welding thermoplastic materials
DE1952752A1 (en) * 1969-10-20 1971-04-29 Gloucester Eng Co Inc Hot-welding device
FR2178179A1 (en) * 1972-03-29 1973-11-09 Iwema Forpacknings Ab
US3943686A (en) * 1974-09-05 1976-03-16 Fmc Corporation Wrapping machine with severing blade in crimping head

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2345533A1 (en) * 2008-09-16 2011-07-20 Unicharm Corporation Perforation forming device
EP2345533A4 (en) * 2008-09-16 2014-03-12 Unicharm Corp Perforation forming device
CN107839297A (en) * 2016-09-18 2018-03-27 曼胡默尔滤清器（上海）有限公司 Filter core paper folder device with wave welding head of ultrasonic wave tape edge structure
CN109649714A (en) * 2019-02-28 2019-04-19 国信电子票据平台信息服务有限公司 Film wrapping machine

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