CH258372A - Hot sealing machine. - Google Patents

Hot sealing machine.

Info

Publication number
CH258372A
CH258372A CH258372DA CH258372A CH 258372 A CH258372 A CH 258372A CH 258372D A CH258372D A CH 258372DA CH 258372 A CH258372 A CH 258372A
Authority
CH
Switzerland
Prior art keywords
machine according
jaws
jaw
movable
sub
Prior art date
Application number
Other languages
French (fr)
Inventor
Common Ideal Packaging Farnham
Original Assignee
Ideal Packagings Limited Farnh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ideal Packagings Limited Farnh filed Critical Ideal Packagings Limited Farnh
Publication of CH258372A publication Critical patent/CH258372A/en

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/24Joining 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
    • B29C65/30Electrical means
    • B29C65/305Electrical means involving the use of cartridge heaters
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/81General 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
    • B29C66/814General 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
    • B29C66/8141General 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
    • B29C66/81433General 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/82Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824Actuating mechanisms
    • B29C66/8244Actuating mechanisms magnetically driven
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/83General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832Reciprocating joining or pressing tools
    • B29C66/8322Joining or pressing tools reciprocating along one axis
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/90Measuring or controlling the joining process
    • B29C66/91Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914Measuring 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
    • B29C66/9141Measuring 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
    • B29C66/91421Measuring 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/90Measuring or controlling the joining process
    • B29C66/91Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914Measuring 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
    • B29C66/9141Measuring 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
    • B29C66/91431Measuring 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 kept constant over time
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/90Measuring or controlling the joining process
    • B29C66/91Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914Measuring 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
    • B29C66/9161Measuring 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
    • B29C66/91641Measuring 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 the heat or the thermal flux being non-constant over time
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/90Measuring or controlling the joining process
    • B29C66/91Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914Measuring 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
    • B29C66/9161Measuring 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
    • B29C66/91651Measuring 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
    • B29C66/91655Measuring 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/90Measuring or controlling the joining process
    • B29C66/94Measuring or controlling the joining process by measuring or controlling the time
    • B29C66/944Measuring or controlling the joining process by measuring or controlling the time by controlling or regulating the time
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/81General 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
    • B29C66/818General 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
    • B29C66/8182General 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
    • B29C66/81821General 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/82Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822Transmission mechanisms
    • B29C66/8227Transmission mechanisms using springs

Landscapes

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

Description

       

  
 



  Machine à sceller à chaud.



   La présente invention a pour objet une machine à sceller à chaud qui   est    caractérisée en ce qu'elle   comprend    deux mâchoires, dont une au moins est chauffée, qui sont destinées à être amenées à proximité immédiate l'une Ide l'autre et à presser ensemble les partics qui doivent être scellées l'une   à l'autre,    et en ce que les mâchoires sont amenées en position de travail au moyen d'un électro-   aimant    agissant sur   l'une    au   moins'    d'entre elles.



   Ces parties peuvent être les portions opposées de l'extrémité ouverte d'un récipient tubulaire   confeetionné    en une matière se scellant à chaud ou   comprenant    une telle   m-a-    tière, ou elles peuvent être les deux moitiés d'une feuille de matière à sceller   ensemble    pour former un   sac,      comprenant    dans certains cas une ou plusieurs cloisons qui divisent le sac en deux ou plus de deux compartiments, ces moitiés et ees cloisons devant être scellées ensemble dans une opération de serrage des mâchoires.



   Le   dessin    annexé représente, à titre d'exemple, une forme d'exécution de   l'inven-    tion.



   Fig. 1 est une élévation   frontale    de la machine, moitié en coupe selon la ligne   I-I    de la fig. 2.



     Fig.    2 est une coupe par la ligne II-II de la fig. 1.



   En se   référant    à ce dessin, la   machine      comprend    une mâchoire inférieure 1 montée horizontalement sur la face supérieure d'une table horizontale fixe 2, et une mâchoire supérieure 3 montée horizontalement et directement au-dessus de la mâchoire   inférieure    sur la face inférieure   d'un    plateau horizontal 4.



  Ledit plateau horizontal 4 est fixé rigidement à ses deux extrémités sur les extrémités supérieures die colonnes mobiles tubulaires verticales 5 qui peuvent coulisser   à travers    des ouvertures ménagées dans la table 2, et   qui    sont reliées à leurs extrémités. inférieures par une barre horizontale 6. Le plateau horizontal 4 avec la mâchoire supérieure 3, les deux   colonnes    mobiles verticales 5 et la barre   horizontale    inférieure 6 forment ainsi un cadre qui peut se déplacer verticalement.

   Des dispositifs à ressort qui sont décrits plus loin, sont disposés de manière à   pousser    ce cadre vers le haut, dans une position limite   dans    laquelle la mâchoire supérieure 3 est à une distance   appropriée    au-dessus de la mâchoire inférieure 1. Un électro-aimant 7 est monté sur un bâti fixe 8, au-dessous de la barre horizontale 6, avec son armature 9 fixée au centre de ladite barre horizontale; la disposition est telle que   lorsque    ledit électro-aimant est sous tension, ladite armature est attirée vers le bas et, en conséquence, tire vers le bas ledit cadre mobile verticalement et presse la mâchoire supérieure 3 sur la mâchoire inférieure 1.

   Des éléments de chauffage 10 et 11, contrôlés par thermostat, sont destinés à maintenir les mâchoires inférieure et supé-  rieure à une   température      appropriée    réglable, et un interrupteur horaire (non représenté) permet de mettre   périodiquement    sous tension l'électro-aimant 7, de telle façon que la mâchoire supérieure 3 est   alternativement    tirée vers le bas, sur la mâchoire inférieure 1, puis relâchée, le temps pendant lequel elle est maintenue au contact de la mâchoire et le temps pendant lequel elle est repoussée vers le haut sous l'action du dispositif à ressort, étant déterminés avec précision par ledit interrupteur   horaire    et   pouvant    être réglés.



   L'appareil décrit est destiné   principale-    ment au   scelllement    des extrémités de   petits      récipients    tubulaires plats confectionnés en une matière se scellant à   chaud    ou   eompre-    nant une telle matière, et il est entendu que l'opérateur introduit   l'extrémité      d'un    récipient pendant l'intervalle de temps pendant lequel la mâchoire supérieure 3 est relevée, après quoi   ladite    mâchoire supérieure   des    cend et les parois   extrêmes'    du récipient sont pressées ensemble entre les deux mâchoires chauffées et le scellement s'effectue.

   Comme il a été dit précédemment, la machine selon l'invention peut,   cependa.nt,    être   utilisée      pour    le scellement à chaud   d'autres      articles.   



   La machine présente plusieurs avantages.



  Premièrement, la force exercée vers le bas par l'électro-aimant 7 peut   être    réglée et déterminée avec précision en   réglant    l'intensité du   courant    qui   lui    est appliqué.



  Deuxièmement, le temps   pendant    lequel les mâchoires 3 et 1 sont maintenues en contact est   réglable    et déterminé   avec    précision au moyen de l'interrupteur horaire et, troisièmement, la température des deux mâchoires est réglable et déterminée avec précision par les éléments de chauffage 10 et il contrôlés par thermostat. En   dé. terminant    ces trois facteurs, intensité, temps et température, il est certain qu'un scellement parfait sera effectué sans danger de   dommage    quelconque. ni pour la matière du   réeipient,    ni pour son contenu.



   Comme il est dit plus loin, les   colonnes    mobiles 5   coulissent    exactement dans   des    manchons de support 12 portés par la   table    2; ainsi, les surfaces   des    mâchoires gauffrées, moletées ou rendues rugueuses   d'une    autre   manière    s'emboîtent toujours exactement l'une dans   l"autre,    mâle ou femelle.



   Les mâchoires 1 et 3 sont   amovibles    et facilement   remplaçables;      différents    types   de    surfaces peuvent donc leur être   facilement    substitués.



   On peut voir dans la construction que les mâchoires 1 et 3 ne sont pas montées directement sur la table 2 et sur le   plateau    4, mais qu'elles sont montées par l'intermédiaire de boîtiers 13 et 14 qui contiennent les éléments de   chauffage    10 et 11. Ainsi le plateau 4, de forme allongée   comme    représenté, comporte une partie   centrale    15 se prolongeant vers l'arrière, c'est-à-dire à l'opposé de   l'endroit    où se   fait    l'opération, la surface inférieure de ladite partie prolongée étant de niveau   avec    la surface inférieure de la partie principale dudit plateau.

   Le boîtier 14   est    monté contre la surface inférieure commune à la partie   principale    4 et au prolongement 15, et forme un logement pour la bobine plate qui constitue l'élément de chauffage 11, contrôlé par thermostat, destiné à chauffer la mâchoire   supérieure    3.   Ladite    mâchoire 3 est montée sur la face inférieure dudit boîtier 14 et la chaleur est alors   conduite    à ladite mâchoire à travers le métal du boîtier.



   De la même manière, le   boîtier    13 est monté sur la surface supérieure de la table 2 et la   mâchoire    1 est montée sur la face su  supérieure    dudit   boîtier    13. Comme il est représenté, les mâchoires 1 et 3 sont de   forme    allongée et sont   placées    en alignement avec les deux colonnes mobiles 5 et entre celles-ci.



   Les deux colonnes mobiles coulissent exactement dans les manchons 12 et ces der  niers sont - suffisamment    longs pour maintenir toujours les colonnes mobiles dans un alignement vertical correct.



   Pour solliciter le cadre   coulissant    ver  ticalement    vers le haut,   ime      cheville      ho,    rizontale 16 passe à travers des   trio, us    diamétralement   opposée      prévus      dans    chaque manchon 12 et à travers des fentes verticales 17 diamétralement opposées pratiquées dans chaque   colonne    mobile tubu-    mire    5;

   à l'intérieur de chaque   colonne    est prévu un ressort hélicoïdal de compression serré entre deux tampons 19 et 20, le tampon inférieur butant contre la cheville fixe 16 et le tampon supérieur butant contre l'ex- trémité inférieure d'une vis de réglage verticale 21 qui est vissée   axialement    dans un écrou moleté 22 vissé sur la tête   de    la colonne mobile 5. En conséquence l'effort exercé par les ressorts 18 peut être réglé au moyen des vis de réglage 21.



   La fixation de chaque colonne mobile 5 sur le   plateau    horizontal supérieur 4 est as  surée    en serrant ledit plateau entre ledit écrou moleté 22 et un épaulement 23 prévu sur la colonne mobile 5.



   La limite supérieure du mouvement vertical du cadre est déterminée par la position des   extrémités    inférieures des fentes verticales 17 dans les   colonnes    5 dans, lesquelles s engagent les chevilles   horizontales    16 portées par les manchons 12. Les fentes 17 sont suffisamment longues pour permettre à la   mâchoire    supérieure 3 de descendre jusqu'à être en contact avec la mâchoire inférieure 1.



   Pour   attacher    l'armature 9 de l'électroaimant à la barre   horizontale    6, une articulation verticale 24 qui pivote à son extrémité inférieure sur ladite armature, passe à travers un trou central prévu dans   ladite    barre horizontale et comporte des écrous 25 vissés à son extrémité supérieure; entre ces écrous et la surface supérieure de ladite barre sont prévues plusieurs rondelles de   caoutchouc    ou   d'autre    matière élastique 26 entre lesquelles peuvent être insérées de minces rondelles de métal. Ainsi, quand l'armature 9   descend,    la barre 6 est tirée vers le bas par   l'inbermé-    diaire des rondelles élastiques 26.

   Ces rondelles   élastiques    26 permettent à l'armature 9, après que les mâchoires 3 et 1 sont   entrées    en contact avec la pièce à sceller, de poursuivre encore son mouvement, de manière que cette armature puisse s'appliquer   complète-    ment contre le pôle de   l'électro-aimant.    Ceci est nécessaire pour prévenir des dommages à   l'enroule. ment    de l'électro-aimant.



   Comme il est   représenté,    la base 8 est fixée à une   certaine    distance, sous la table 4 au moyen de pièces d'écartement 28 de section carrée présentant des extrémités réduites filetées 29 qui passent à travers lesdites table et base et qui sont munies   écrous.      L'espace    entre la table 2 et la base 8 est fermé au moyen de   plateaux    avant et arrière 30 et de plateaux latéraux 31, lesdits plateaux 30 et 31 étant fixés par des vis aux   pièzes      d'éear-      tement    28. L'ensemble forme un bâti pour la ma chine.



   Des revêtements isolants appropriés peuvent être prévus pour couvrir   les    boîtiers 13 et 14 contenant les éléments de chauffage 10 et 11, dans le but de réduire les pertes de chaleur par   radiation;    une matière isolante peut être prévue aussi pour isoler lesdits   boî-    tiers du plateau 4 et de la table 2.



   Comme il a été dit, les mâchoires 1 et 3 sont amovibles et remplaçables. Elles peuvent être   d'un    type   quelconque:    moletées,   à rainu-    res droites ou en diagonale, unies ou bosselées.



     Un    dispositif d'arrêt approprié peut être prévu pour déterminer jusqu'où la   pièce    à sceller (par exemple l'extrémité d'un tube plat ou   d'un    manchon plat) est introduite entre les mâchoires 1 et 3. L'opérateur peut ainsi pousser la pièce à sceller jusqu'à cet   arrêt    et la maintenir jusqu'à ce qu'elle soit serrée entre les mâchoires Ensuite, il peut lâcher la pièce et prendre la pièce suivante, la disposition est telle que sitôt les mâchoires ouvertes, la pièce qui est placée entre elles   balance    en   avant    et tombe   dans    un récipient approprié.



   Une protection peut être   prévue    sur le devant de la machine pour éviter que les doigts de l'opérateur soient pincés entre les mâchoires. Cette protection peut comporter une fente horizontale à travers laquelle la pièce plate   tubulaire    est poussée; autour de la fente peuvent être   montés    deux guides convergents, un en   haut    et l'autre en bas, qui guident la pièce dans la position voulue entre les mâchoires, les extrémités intérieures de ces guides   étant    trop rapprochées l'une de  l'autre pour laisser passer un   doigt    de l'opérateur.



   En pratique, un interrupteur horaire unique et un thermostat unique peuvent   eontrô-    ler une série de douze   machines',    par exemple.



   L'électro-aimant pourrait être disposé de manière à   pousser    la mâchoire supérieure vers le bas, au lieu de la tirer.
  



  
 



  Hot sealing machine.



   The present invention relates to a hot sealing machine which is characterized in that it comprises two jaws, at least one of which is heated, which are intended to be brought into close proximity to one another and to press. together the parts which are to be sealed to each other, and in that the jaws are brought into the working position by means of an electromagnet acting on at least one of them.



   These parts may be the opposing portions of the open end of a tubular container made of or comprising a heat-sealing material, or they may be the two halves of a sheet of material to be sealed together. forming a bag, in some cases comprising one or more partitions which divide the bag into two or more compartments, these halves and these partitions to be sealed together in a jaw clamping operation.



   The accompanying drawing shows, by way of example, one embodiment of the invention.



   Fig. 1 is a front elevation of the machine, half in section along the line I-I of FIG. 2.



     Fig. 2 is a section taken along line II-II of FIG. 1.



   Referring to this drawing, the machine comprises a lower jaw 1 mounted horizontally on the upper face of a fixed horizontal table 2, and an upper jaw 3 mounted horizontally and directly above the lower jaw on the underside of a horizontal plate 4.



  Said horizontal plate 4 is rigidly fixed at its two ends on the upper ends of the vertical tubular mobile columns 5 which can slide through openings made in the table 2, and which are connected at their ends. lower by a horizontal bar 6. The horizontal plate 4 with the upper jaw 3, the two vertical movable columns 5 and the lower horizontal bar 6 thus form a frame which can move vertically.

   Spring devices which are described later are arranged so as to push this frame upwards, in a limiting position in which the upper jaw 3 is at a suitable distance above the lower jaw 1. An electromagnet 7 is mounted on a fixed frame 8, below the horizontal bar 6, with its frame 9 fixed to the center of said horizontal bar; the arrangement is such that when said electromagnet is energized, said armature is drawn downwards and, consequently, pulls down said movable frame vertically and presses the upper jaw 3 on the lower jaw 1.

   Heating elements 10 and 11, controlled by thermostat, are intended to maintain the lower and upper jaws at a suitable adjustable temperature, and a time switch (not shown) enables the electromagnet 7 to be periodically energized, in such a way that the upper jaw 3 is alternately pulled downwards, over the lower jaw 1, then released, the time during which it is maintained in contact with the jaw and the time during which it is pushed upwards under the action of the spring device, being precisely determined by said time switch and being adjustable.



   The apparatus described is primarily intended for sealing the ends of small, flat tubular containers made of a heat-sealing material or comprising such material, and it is understood that the operator introduces the end of a container. during the time interval in which the upper jaw 3 is raised, after which said upper jaw of the ash and the end walls of the container are pressed together between the two heated jaws and the sealing takes place.

   As has been said previously, the machine according to the invention can, cependa.nt, be used for heat sealing other articles.



   The machine has several advantages.



  First, the downward force exerted by the electromagnet 7 can be precisely regulated and determined by adjusting the intensity of the current applied to it.



  Secondly, the time during which the jaws 3 and 1 are kept in contact is adjustable and precisely determined by means of the time switch and, thirdly, the temperature of the two jaws is adjustable and precisely determined by the heating elements 10 and it controlled by thermostat. In dice. finishing these three factors, intensity, time and temperature, it is certain that a perfect seal will be carried out without danger of any damage. neither for the material of the container, nor for its content.



   As stated below, the movable columns 5 slide exactly in the support sleeves 12 carried by the table 2; thus, the surfaces of the embossed, knurled, or otherwise roughened jaws always fit into each other exactly, male or female.



   Jaws 1 and 3 are removable and easily replaced; different types of surfaces can therefore easily be substituted for them.



   It can be seen in the construction that the jaws 1 and 3 are not mounted directly on the table 2 and on the plate 4, but that they are mounted through housings 13 and 14 which contain the heating elements 10 and 11. Thus the plate 4, of elongated shape as shown, comprises a central part 15 extending towards the rear, that is to say opposite to the place where the operation is carried out, the lower surface. said extended portion being level with the lower surface of the main portion of said tray.

   The housing 14 is mounted against the lower surface common to the main part 4 and to the extension 15, and forms a housing for the flat coil which constitutes the heating element 11, controlled by thermostat, intended to heat the upper jaw 3. Said jaw 3 is mounted on the underside of said housing 14 and heat is then conducted to said jaw through the metal of the housing.



   Likewise, the housing 13 is mounted on the upper surface of the table 2 and the jaw 1 is mounted on the upper surface of said housing 13. As shown, the jaws 1 and 3 are elongated and are placed. in alignment with the two mobile columns 5 and between them.



   The two mobile columns slide exactly in the sleeves 12 and the latter are sufficiently long to always keep the mobile columns in correct vertical alignment.



   To urge the sliding frame vertically upwards, an ankle ho, horizontal 16 passes through diametrically opposed trio, us provided in each sleeve 12 and through diametrically opposed vertical slots 17 made in each mobile tubular column 5;

   inside each column is provided a compression coil spring clamped between two buffers 19 and 20, the lower buffer abutting against the fixed peg 16 and the upper buffer abutting against the lower end of a vertical adjustment screw 21 which is screwed axially in a knurled nut 22 screwed on the head of the movable column 5. Consequently, the force exerted by the springs 18 can be adjusted by means of the adjusting screws 21.



   The fixing of each movable column 5 on the upper horizontal plate 4 is ensured by tightening said plate between said knurled nut 22 and a shoulder 23 provided on the movable column 5.



   The upper limit of the vertical movement of the frame is determined by the position of the lower ends of the vertical slots 17 in the columns 5 into which the horizontal pins 16 carried by the sleeves 12 engage. The slots 17 are long enough to allow the jaw upper 3 to descend until it is in contact with the lower jaw 1.



   To attach the armature 9 of the electromagnet to the horizontal bar 6, a vertical articulation 24 which pivots at its lower end on said armature, passes through a central hole provided in said horizontal bar and has nuts 25 screwed at its end. superior; between these nuts and the upper surface of said bar are provided several washers of rubber or other elastic material 26 between which can be inserted thin metal washers. Thus, when the armature 9 descends, the bar 6 is pulled downwards by means of the spring washers 26.

   These elastic washers 26 allow the armature 9, after the jaws 3 and 1 have come into contact with the part to be sealed, to continue its movement, so that this armature can rest fully against the pole of the electromagnet. This is necessary to prevent damage to the coil. ment of the electromagnet.



   As shown, the base 8 is fixed at a certain distance, under the table 4 by means of spacers 28 of square section having reduced threaded ends 29 which pass through said table and base and which are provided with nuts. The space between the table 2 and the base 8 is closed by means of front and rear trays 30 and side trays 31, said trays 30 and 31 being fixed by screws to the element pieces 28. The assembly forms a frame for ma chine.



   Appropriate insulating coatings can be provided to cover the housings 13 and 14 containing the heating elements 10 and 11, in order to reduce heat loss by radiation; an insulating material may also be provided to insulate said housings from the plate 4 and from the table 2.



   As has been said, jaws 1 and 3 are removable and replaceable. They can be of any type: knurled, straight or diagonal grooves, plain or embossed.



     A suitable stopper can be provided to determine how far the part to be sealed (for example the end of a flat tube or a flat sleeve) is introduced between the jaws 1 and 3. The operator can thus push the part to be sealed to this stop and hold it until it is clamped between the jaws Then he can let go of the part and take the next part, the arrangement is such that as soon as the jaws open, the part which is placed between them swings forward and falls into a suitable container.



   Protection can be provided on the front of the machine to prevent the operator's fingers from being pinched between the jaws. This protection may include a horizontal slot through which the flat tubular part is pushed; around the slot can be mounted two converging guides, one at the top and the other at the bottom, which guide the part in the desired position between the jaws, the inner ends of these guides being too close to each other for pass a finger of the operator.



   In practice, a single time switch and a single thermostat can control a series of twelve machines, for example.



   The electromagnet could be arranged to push the upper jaw down, instead of pulling it.
  


    

Claims (1)

REVENDICA TION : Machine à sceller à chaud, caractérisée en ce qu'elle comprend deux mâchoires, dont une au moins est chauffée, qui sont destinées à être amenées à proximité immédiate l'une de l'autre et à presser ensemble les parties qui doivent être scellées l'une à l'autre, et en oe que les mâchoires sont amenées en position de travail au moyen d'un éleetro-aimant agissant sur l'une au moins d'entre elles. CLAIM: Hot sealing machine, characterized in that it comprises two jaws, at least one of which is heated, which are intended to be brought into close proximity to each other and to press together the parts which are to be sealed. 'to one another, and in that the jaws are brought into the working position by means of an electro-magnet acting on at least one of them. SOUS-REVENtICATIONS: 1. Machine selon la revendication, caractérisée en ce qu'une desdites mâchoires est fixe et l'autre est disposée de manière à pouvoir venir en contact avec ladite mâchoire fixe quand l'électro-aimant est mis sous tension, des dispositifs à ressort permettant de repousser ladite mâchoire mobile dansstaposi- tion de repos quand l'électro-aimant n'est plus sous tension. SUB-CLAIMS: 1. Machine according to claim, characterized in that one of said jaws is fixed and the other is arranged so as to be able to come into contact with said fixed jaw when the electromagnet is energized, spring devices allowing to push said movable jaw back into a rest position when the electromagnet is no longer under voltage. 2. Machine selon la revendication et la sons-revendication 1, caractérisée en ce que la mâchoire mobile est montée sur un support solidaire de deux colonnes mobiles parallèles, montées de manière à pouvoir coulisser axialement dans un bâti de la machine, une traverse étant également montée sur lesdites colonnes mobiles à leur extrémité opposée au dit support, la mâchoire fixe étant montée à l'intérieur du cadre formé par le support, lesdites colonnes. 2. Machine according to claim and claim 1, characterized in that the movable jaw is mounted on a support integral with two parallel movable columns, mounted so as to be able to slide axially in a frame of the machine, a cross member also being mounted on said mobile columns at their end opposite to said support, the fixed jaw being mounted inside the frame formed by the support, said columns. mobiles et la traverse, et l'armature de l'électro-aimant étant accouplée à ladite traverse, de façon que lorsque ledit électro-aimant est sous tension, le cadre soit déplacé dans le sens axial des colonnes mobiles. à l'encontre de l'action des dispositifs a ressort, afin d'amener ladite mâchoire mobile en contact avec ladite mâchoire fixe. movable and the cross member, and the armature of the electromagnet being coupled to said cross member, so that when said electromagnet is energized, the frame is moved in the axial direction of the movable columns. against the action of the spring devices, in order to bring said movable jaw into contact with said fixed jaw. 3. Machine selon Ia revendication et les sous-revendications 1 et 2, caractérisée en ce que lesdites colonnes mobiles sont creuses et en ce que les dispositifs à ressort sont constitués par deux ressorts hélicoïdaux, chacun des ressorts étant placé dans une colonne mobile et prenant appui, d'une part, sur un organe solidaire de la colonne mobile et, d'autre part, sur un organe fixe qui passe à travers des fentes longitudinales ménagées dans les parois de ladite colonne mobile. 3. Machine according to claim Ia and sub-claims 1 and 2, characterized in that said movable columns are hollow and in that the spring devices consist of two helical springs, each of the springs being placed in a movable column and taking bearing, on the one hand, on a member integral with the movable column and, on the other hand, on a fixed member which passes through longitudinal slots formed in the walls of said movable column. 4. Machine selon la revendication et les sous-revendications 1, 2 et 3, caractérisée en ce que ledit organe fixe est porté par un manchon solidaire dudit bâti et dans lequel la colonne mobile peut coulisser axialement. 4. Machine according to claim and sub-claims 1, 2 and 3, characterized in that said fixed member is carried by a sleeve integral with said frame and in which the movable column can slide axially. 5. Machine selon la revendication et les sous-revendications 1 à 4, caractérisée en ce que ladite mâchoire mobile est chauffée, cette mâchoire mobile étant montée sur un boîtier qui est fixé sur ledit support, un élément de chauffage électrique étant disposé dans ledit boîtier. 5. Machine according to claim and sub-claims 1 to 4, characterized in that said movable jaw is heated, this movable jaw being mounted on a housing which is fixed on said support, an electric heating element being arranged in said housing. . 6. Machine selon la revendication et les sous-revendications 1 à 5, caractérisée en ce que la mâchoire fixe est également chauffée, cette mâchoire étant également montée sur un boîtier qui contient un élément de chauffage électrique. 6. Machine according to claim and sub-claims 1 to 5, characterized in that the fixed jaw is also heated, this jaw also being mounted on a housing which contains an electric heating element. 7. Machine selon la revendication et les sous-revendications 1 à 6, caractérisée en ce que l'armature de l'électro-aimant est reliée, par l'intermédiaire d'une articulation, au cen- tre de ladite traverse. 7. Machine according to claim and sub-claims 1 to 6, characterized in that the armature of the electromagnet is connected, via an articulation, to the center of said cross member. 8. Machine selon la revendication et les sous-revendications 1 à 7, caractérisée en ce que les colonnes mobiles sont verticales et que la mâchoire mobile est montée directement au-dessus de la mâchoire fixe. 8. Machine according to claim and sub-claims 1 to 7, characterized in that the movable columns are vertical and that the movable jaw is mounted directly above the fixed jaw. 9. Machine selon la revendication, caractérisée en ce que l'élément de chauffage d'au moins une mâchoire est contrôlé par un thermostat. 9. Machine according to claim, characterized in that the heating element of at least one jaw is controlled by a thermostat. 10. Machine selon la revendication, caractérisée en ce qu'un dispositif horaire est destiné à assurer périodiquement la mise en et hors circuit de l'électro-aimant, de telle ma niere que les mâchoires soient périodiquement amenées eu contact, puis éloignées Irune de l'autre. 10. Machine according to claim, characterized in that a time device is intended to periodically ensure the switching on and off of the electromagnet, such that the jaws are periodically brought into contact, then moved away from Irune. the other. 11. Machine selon la revendication et la sous-revendication 10, caractérisée en ce que la durée des périodes pendant lesquelles les mâchoires sont en contact et sont sépares l'une de l'autre est réglable et déterminée avec précision par ledit dispositif horaire. 11. Machine according to claim and sub-claim 10, characterized in that the duration of the periods during which the jaws are in contact and are separated from one another is adjustable and determined with precision by said time device. 12. Machine selon la revendication et la sous-revendication 1, ca. ra, ctérisée en ce que l'effort exercé par les dispositifs à ressort est réglable. 12. Machine according to claim and sub-claim 1, ca. ra, ctérisée in that the force exerted by the spring devices is adjustable. 13. Machine selon la revendication et les sous-revendications 1 à 3, caractérisée en ce que l'effort exercé par chaque ressort peut être réglé au moyen d'un organe solidaire de la colonne mobile correspondante. 13. Machine according to claim and sub-claims 1 to 3, characterized in that the force exerted by each spring can be adjusted by means of a member secured to the corresponding movable column. 14. Machine selon la revendication ea- ractérisée en ce que lesdites ; mâchoires sont amovibles, de manière à pouvoir être facilement remplacées. 14. Machine according to claim ea- actérisée in that said; jaws are removable, so that they can be easily replaced. 15. Machine selon la revendication, 'ca ractérisée on ce que la liaison entre l'armature de l'électro-aimant et le cadre portant les mâchoires est élastique, de façon qu'après que les mâchoires ont été amenées au contact l'une de l'autre, l'armature de l'électroaimant puisse se déplacer encore, afin de venir en contact avec le pôle de l'électro- aimant. 15. Machine according to claim, 'ca acterized that the connection between the armature of the electromagnet and the frame carrying the jaws is elastic, so that after the jaws have been brought into contact with one on the other hand, the armature of the electromagnet can still move, in order to come into contact with the pole of the electromagnet. 16. Machine selon la revendication et les sous-revendications 1 à 7 et 15, caractérisée en ce que ladite liaison passe à travers un trou percé au centre de ladite traverse et présente un épaulement à son extrémité, au moins une rondelle élastique étant placée entre cet épaulement et la face de ladite traverse. 16. Machine according to claim and sub-claims 1 to 7 and 15, characterized in that said connection passes through a hole drilled in the center of said cross member and has a shoulder at its end, at least one elastic washer being placed between this shoulder and the face of said cross member. 17. Machine selon la revendication, ca raetérisée en ce que les mâchoires sont disposées de manière à pouvoir sceller les extrémités de petits récipients tubulaires. 17. Machine according to claim, ca raeterized in that the jaws are arranged so as to be able to seal the ends of small tubular containers.
CH258372D 1945-02-24 1946-12-10 Hot sealing machine. CH258372A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB258372X 1945-02-24
GB140246X 1946-02-14

Publications (1)

Publication Number Publication Date
CH258372A true CH258372A (en) 1948-11-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
CH258372D CH258372A (en) 1945-02-24 1946-12-10 Hot sealing machine.

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CH (1) CH258372A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2743315A1 (en) * 1977-09-27 1979-04-05 Rudolf Ing Grad Wehinger Electric welder for plastics film - has a fixed and a mobile sealing jaw, either or both fitted with electromagnets
WO1983003397A1 (en) * 1982-03-23 1983-10-13 Aldo Artusi Method and device particularly for sealing containers with a sheet of the like

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2743315A1 (en) * 1977-09-27 1979-04-05 Rudolf Ing Grad Wehinger Electric welder for plastics film - has a fixed and a mobile sealing jaw, either or both fitted with electromagnets
WO1983003397A1 (en) * 1982-03-23 1983-10-13 Aldo Artusi Method and device particularly for sealing containers with a sheet of the like

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