BE492438A - - Google Patents

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Publication number
BE492438A
BE492438A BE492438DA BE492438A BE 492438 A BE492438 A BE 492438A BE 492438D A BE492438D A BE 492438DA BE 492438 A BE492438 A BE 492438A
Authority
BE
Belgium
Prior art keywords
sep
films
metal sheets
synthetic
temperature
Prior art date
Application number
Other languages
English (en)
Publication of BE492438A publication Critical patent/BE492438A/fr

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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
    • B29C66/90—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
    • B29C66/91655—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 by controlling or regulating the current intensity
    • 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
    • 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
    • B29C66/45—Joining of substantially the whole surface of the 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
    • B29C66/70—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
    • B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • 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
    • B29C66/9141—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
    • B29C66/91441—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 the temperature being non-constant over time
    • 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
    • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
    • B29C66/024—Thermal pre-treatments
    • B29C66/0242—Heating, or preheating, e.g. drying

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)

Description


   <Desc/Clms Page number 1> 
 



  "Procédé de scellement de pellicules synthétiques thermoplastiques 
Des pellicules synthétiques thermoplastiques peuvent être scellées par un effet de chaleur, accompagné d'un effet de pres- sion. 



   La pression, la température et la durée de leur application dépendent des propriétés chimiques et physiques de la pellicule. 



   Lorsque deux pellicules synthétiques thermoplastiques jointives sont pressées entre deux plaques métalliques chauffées, la chaleur nécessaire pour le scellement des pellicules doit traverser l'épaisseur de la pellicule, mauvaise conductrice de chaleur. 



   Pour favoriser le chauffage rapide des pellicules, on a déjà préconisé d'augmenter la température des plaques chauffantes; 

 <Desc/Clms Page number 2> 

 cette conception entraîne toutefois de graves inconvénients. 



   En effet, si notamment la température des surfaces chauf- fantes surpasse le point de fusion des pellicules synthétiques thermoplastiques, ces dernières commenceront à coller, respective- ment à fondre contre ces surfaces chauffantes, pour pouvoir y être enlevées seulement après avoir ramené la température en- dessous du point de fusion des pellicules. 



   Contrairement à cette conception onéreuse, l'invention se rapporte à un procédé écartant complètement l'inconvénient cité. 



   Selon l'invention les pellicules synthétiques à sceller sont disposées sous une légère pression entre deux feuilles de métal lesquelles sont chauffées, à l'aide d'un courant électrique et pendant une période de temps très réduite, au-dessus de la température de fusion des pellicules synthétiques. L'épaisseur de ces feuilles métalliques sera préférablement de l'ordre de 0,01 à 0,5 mm. Le chauffage très court des feuilles de métal sera de préférence tel que les feuilles de métal peuvent être réalisées comme résistances connectées dans un circuit électrique. 



   Comme matière pour la confection des plaques de métal on pourra avantageusement prendre un alliage à résistance électrique élevée, tel que par exemple un alliage de : 
 EMI2.1 
 
<tb> Nickel <SEP> 50 <SEP> - <SEP> 95 <SEP> %
<tb> 
<tb> Chrome <SEP> 3 <SEP> - <SEP> 50 <SEP> % <SEP> 
<tb> 
<tb> Fer <SEP> 10 <SEP> - <SEP> 30 <SEP> %
<tb> 
 
Pour réaliser un chauffage à durée très réduite, on soumet les plaques métalliques, selon l'invention, à un coup de courant    d'une valeur appropriée ; coups de courant pourront avantageu-   sement être produits par un condensateur, branché dans le circuit des plaques. 



   Le scellement aura alors lieu comme suit: 
Deux ou plusieurs pellicules synthétiques thermoplastiques sont comprimées entre deux feuilles de la composition précitée, avec une pression de 0,01 à 10 Kg./cm2. 

 <Desc/Clms Page number 3> 

 



   Les feuilles métalliques peuvent être portées à une tempé- rature voisine du point de ramolissement des pellicules synthé- tiques, avant de commencer le processus de scellement. Lors de la production des coups de courant, les feuilles métalliques sont portées, pendant une fraction de temps très réduite, à la température de fusion, respectivement de ramolissement des pellicules synthétiques thermoplastiques, les surfaces voisines de ces dernières étant ainsi scellées de façon intime et homo- gène. 



   Par l'épaisseur minime de ces feuilles métalliques, leur température reprendra très rapidement une valeur moindre que celle nécessaire à la fusion, respectivement au ramolissement des pellicules, une fois que le courant est coupé. 



   Les pellicules synthétiques scellées pourront alors sans aucune difficulté être dégagées du dispositif de scellement, lorsque l'effet de pression est écarté. 



   Les pellicules synthétiques ainsi scellées présentent une homogénéité et une solidité pratiquement parfaites. 



   REVENDICATIONS. 



   1. Procédé de scellement de pellicules synthétiques thermo- plastiques entre des surfaces métalliques chauffantes, caractérisa en ce que les pellicules synthétiques sont disposées entre deux feuilles de métal branchées dans un circuit électrique, ces feuilles de métal étant portées, pendant une période de temps réduite prédéterminée, à une température correspondant au moins au point de ramolissement, respectivement de fusion des feuilles synthétiques.

Claims (1)

  1. 2. Procédé selon la revendication 1, caractérisé en ce que les feuilles métalliques sont, avant l'introduction des pellicule synthétiques, portées à une température inférieure à la tempéra- ture de ramolissement, respectivement de fusion des matières à sceller. <Desc/Clms Page number 4>
    3. Procédé selon la revendication 1, caractérisé en ce que les feuilles métalliques sont chauffées au-dessus de la tempéra- ture de ramolissement, respectivement de fusion des pellicules synthétiques, à l'intervention des décharges d'au moins un condensateur.
    4. Procédé selon la revendication 1, caractérisé en ce que les feuilles métalliques ont une épaisseur de l'ordre de 0,01 à 0,5 mm.
    5. Procédé selon la revendication 4, caractérisé en ce que la matière des feuilles métalliques présente la composition suivante : EMI4.1 <tb> Nickel <SEP> 50 <SEP> - <SEP> 95 <SEP> % <SEP> <tb> <tb> Chrome <SEP> 3 <SEP> - <SEP> 50 <SEP> % <SEP> <tb> <tb> Fer <SEP> 10 <SEP> - <SEP> 30 <SEP> % <SEP> <tb> 6. Procédé selon la revendication 1, caractérisé en ce que les pellicules synthétiques sont scellées sous une pression de 0,01 à 10 Kg./cm2.
    7. Procédé de scellement de pellicules synthétiques thermo- plastiques, substantiellement tel que décrit ci-dessus.
BE492438D BE492438A (fr)

Publications (1)

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BE492438A true BE492438A (fr)

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BE492438D BE492438A (fr)

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