BE433913A - - Google Patents

Info

Publication number
BE433913A
BE433913A BE433913DA BE433913A BE 433913 A BE433913 A BE 433913A BE 433913D A BE433913D A BE 433913DA BE 433913 A BE433913 A BE 433913A
Authority
BE
Belgium
Prior art keywords
solvent
jaws
film
air
installation
Prior art date
Application number
Other languages
French (fr)
Publication of BE433913A publication Critical patent/BE433913A/fr

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
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11Joint 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
    • B29C66/112Single lapped joints
    • B29C66/1122Single lap to lap joints, i.e. overlap joints
    • 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
    • B29C65/48Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4895Solvent bonding, i.e. the surfaces of the parts to be joined being treated with solvents, swelling or softening agents, without adhesives
    • 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
    • B29C66/003Protecting areas of the parts to be joined from overheating
    • 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
    • B29C66/40General 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
    • B29C66/41Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43Joining a relatively small portion of the surface of said articles
    • 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
    • B29C66/70General 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
    • B29C66/71General 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)

Description

       

   <Desc/Clms Page number 1> 
 



  Installation pour l'assemblage de deux extrémités de film enduites d'un solvant ". 



   L'invention concerne une installation ou appareil pour ltassemblage sous pression de deux extrémités de   1 film   ou pellicule enduites d'un solvant, les mots assem- blage de deux extrémités de film, devant aussi être compris en particulier dans le sens d'une fusion de deux extrémités de film, qui se fait en mettant sur les surfaces avoisi- nantes de deux extrémités de film placées l'une sur l'au- tre, un solvant qui dissout la matière du film, tandis que les extrémités de 'film sont soumises à une pression,   éven-   tuellement avec emploi de chaleur, jusqu'à ce que la dou- ble épaisseur de film ait été ramenée par pression à la sim- ple épaisseur de film par écoulement de la matière du film dissoute excédante. 



   Le   but   de l'invention est de créer une installation   @   au moyen de laquelle on peut obtenir un assemblage des ex- trémités de film impeccable à tous égards et durable et   @   

 <Desc/Clms Page number 2> 

 qui garantisse aussi en particulier la conservation d'un état parfaitement plan du film même à l'endroit de l'assem- blage. 



   Ceci est obtenu suivant l'invention au moyen d'une ins- tallation pour la compression des extrémités de film pendant leur assemblage, qui possède deux mordaches perméables à l'air qui exercent la pression d'assemblage et repose sur l'idée qu'un assemblage'vraiment impeccable et durable des extrémités de film et en particulier la conservation d'un état plan du film même à l'endroit de collage ne peut être atteinte que si l'on donne assez largement au solvant le moyen de s'échapper pen- dant l'application de la force de pressage. 



   D'une part il faut que l'échappement du solvant ne se fasse pas trop rapidement, d'autre part, il faut veiller à ce que la force de compression agisse sur toute la surface pendant l'é- chappement du solvant. Ceci s'obtient au mieux suivant l'in- vention par ls fait que les mordaches sont traversées d'un grand nombre de fins canaux qui mettent en communication la surface de serrage avec la surface extérieure des mordaches, en particulier avec la surface postérieure. Cette mise en   communi-   cation ne doit cependant pas être nécessairement directe; bien au contraire l'objet de l'invention peut être atteint aussi avec des mordaches qui sont constituées d'une matière première de structure spongieuse.

   Une matière première traversée de fins canaux a, aussi bien qu'une matière première de nature spon- gieuse, quand elle est rectifiée de façon à présenter une surface plane, 1 'propriété de posséder une grande surface active de pression , qui présente beaucoup de canaux d'air à travers les- quels le solvant peut s'échapper, sans qu'il y ait à craindre un échappement trop rapide du solvant. 



   Le laps de temps le plus favorable pendant lequel les ex- trémités de film enduites du solvant doivent être maintenues sous pression, et pendant lequel le solvant doit s'échapper, 

 <Desc/Clms Page number 3> 

 dépend de la matière du film, qui peut consister par exemple en acétate, nitrate ou hydrate de cellulose, et du solvant employé, par exemple de ltacide acétique glacial ou semblable, et est fa- cile à déterminer expérimentalement. Comme l'échappement du sol- vant de l'endroit de liaison du film est essentiellement fonction des conditions physiques ambiantes, l'invention prévoit d'entourer les mordaches d'une chambre, qui est pourvue d'une installation pour régler le degré d'absorption du solvant par l'air, par laquelle ce réglage peut être effectué de la manière connue en elle-même. 



   Une installation conforme à l'invention est représentée schématiquement dans un exemple de réalisation sur le dessin. 



   Les deux extrémités de film à assembler sont désignées par 1 et 2. Elles sont enduites d'un solvant et sont, comme figuré, placées immédiatement l'une sur l'autre et comprimées ensemble de telle sorte que la matière de film superflue s'écoule, mais peu- vent aussi par exemple être jointes l'une à l'autre par leurs bords à réunir coupés en biseaux opposés, et assemblées l'une à l'autre par pression. 



   La force de pression est exercée par deux mordaches 3,4 ; la direction de la pression est représentée sur le dessin par des flèches. Les mordaches sont constituées de telle manière qu'elles favorisent l'échappement dit solvant du film de l'endroit d'as- semblage des films ou bien l'évaporation et l'extraction par as- piration du solvant. Dans ce but les mordaches arasées suivant un plan sont rendues perméables à l'air sur leur surface de serrage; et en fait les mordaches sont avantageusement percées d'un grand nombre de fins canaux, qui mettent en communication la surface de 
 EMI3.1 
 serrage avec la surface extérieure des mordaches, en particulier ,ij./ Oe64tLàL ''' avec leur surface extérieure.

   Sur le dessin ces canaux sont figurés schématiquement dans un plan de coupe par quelques canaux   recti-   lignes en petit nombre, le nombre des canaux dans les différentes surfaces de coupe transversale peut cependant être essentiellement plus grand que figuré, et au lieu de oanaux reotilignes, des canaux 

 <Desc/Clms Page number 4> 

 
 EMI4.1 
 finement contournés peuvent trouver application aussi. Une matière première de structure spongieuse, notamment une matière JI fi0vÙavec un grand nombre de petites alvéoles qui sont séparées l'une   del'autre   par de fines parois de séparation, à travers lesquelles le solvant peut facilement diffuser, est appropriée à la   fabrication   des mordaches. 



   Les mordaches sont entourées   d'un   carter 5 dans lequel le degré d'absorption par l'air du solvant est réglable. Ce réglage peut être fait des manières les plus différentes. Si par exemple l'absorption par l'air du solvant est une fonction de l'humidité de l'air, on peut, au moyen d'un ventilateur 7, aspirer par une ouverture 6 du carter 5 de l'air frais dont la teneur en humidité est réglable par la disposition de cuvettes ou capsules ae séchage 8; l'excès d'air peut s'échapper par 9. 



  On peut toutefois naturellement régler l'absorption du solvant par l'air de beaucoup d'autres manières encore, par exemple en amenant directement du solvant à l'air contenu dans la chambre ou en lui en retirant. 



   REVENDICATIONS 
1. Installation ou appareil pour assembler sous pression deux extrémités de film enduites d'un solvant, caractériséepar deux mordaches perméables à l'air exerçant la pression d'assem- blage.



   <Desc / Clms Page number 1>
 



  Installation for the assembly of two ends of film coated with a solvent ".



   The invention relates to an installation or apparatus for the press-assembly of two ends of a film or film coated with a solvent, the words joining of two ends of film, also to be understood in particular in the sense of a melting. of two film ends, which is accomplished by putting on the neighboring surfaces of two film ends placed one on top of the other, a solvent which dissolves the film material, while the film ends are subjected to pressure, possibly with the use of heat, until the double film thickness has been reduced by pressure to the single film thickness by flowing out the excess dissolved film material.



   The object of the invention is to create an installation @ by means of which an assembly of the film ends which is impeccable in all respects and durable and @ can be obtained.

 <Desc / Clms Page number 2>

 which also guarantees in particular the preservation of a perfectly flat condition of the film even at the place of assembly.



   This is achieved according to the invention by means of an installation for compressing the film ends during their assembly, which has two air-permeable jaws which exert the assembly pressure and is based on the idea that a really impeccable and durable assembly of the ends of the film and in particular the preservation of a flat state of the film even at the place of bonding can only be achieved if the solvent is sufficiently given the means to escape during the application of the pressing force.



   On the one hand, the solvent must not escape too quickly, on the other hand, it must be ensured that the compressive force acts on the entire surface during the solvent escape. This is best achieved according to the invention by the fact that the jaws are traversed by a large number of fine channels which place the clamping surface in communication with the outer surface of the jaws, in particular with the posterior surface. However, this communication need not be direct; on the contrary, the object of the invention can also be achieved with jaws which consist of a raw material of spongy structure.

   A raw material traversed by fine channels has, as well as a raw material of a spongy nature, when it is ground so as to present a flat surface, the property of having a large pressure active surface, which presents a lot of pressure. air channels through which the solvent can escape, without fear of too rapid escape of the solvent.



   The most favorable period of time during which the film ends coated with the solvent must be kept under pressure, and during which the solvent must escape,

 <Desc / Clms Page number 3>

 depends on the material of the film, which may be, for example, cellulose acetate, nitrate or hydrate, and on the solvent employed, for example glacial acetic acid or the like, and is easy to determine experimentally. As the escape of the solvent from the bonding point of the film is essentially a function of the ambient physical conditions, the invention provides for surrounding the jaws with a chamber, which is provided with an installation for adjusting the degree of absorption of the solvent by air, whereby this adjustment can be effected in the manner known per se.



   An installation according to the invention is shown schematically in an exemplary embodiment in the drawing.



   The two ends of the film to be assembled are designated by 1 and 2. They are coated with a solvent and are, as shown, placed immediately one on top of the other and compressed together so that the excess film material s' flows, but can also, for example, be joined to one another by their edges to be joined cut into opposite bevels, and assembled to each other by pressure.



   The pressure force is exerted by two jaws 3,4; the direction of the pressure is shown in the drawing by arrows. The mordaches are formed in such a way that they promote the so-called solvent escape of the film from the place of assembly of the films or else the evaporation and extraction by suction of the solvent. For this purpose the jaws leveled in a plane are made permeable to air on their clamping surface; and in fact the jaws are advantageously pierced with a large number of fine channels, which put the surface of the
 EMI3.1
 tightening with the outer surface of the jaws, in particular, ij. / Oe64tLàL '' 'with their outer surface.

   In the drawing these channels are shown schematically in a section plane by a few rectilinear channels in small number, the number of channels in the different cross-sectional surfaces can however be essentially greater than shown, and instead of reotilinear channels, channels

 <Desc / Clms Page number 4>

 
 EMI4.1
 finely bypassed can also find application. A raw material with a spongy structure, especially a JI fi0vÙ material with a large number of small cells which are separated from each other by thin dividing walls, through which the solvent can easily diffuse, is suitable for the manufacture of mordaches. .



   The jaws are surrounded by a housing 5 in which the degree of absorption by the air of the solvent is adjustable. This adjustment can be done in the most different ways. If, for example, the absorption by the air of the solvent is a function of the humidity of the air, it is possible, by means of a fan 7, to suck in through an opening 6 of the casing 5 fresh air whose moisture content is adjustable by the arrangement of drying cuvettes or capsules 8; excess air can escape through 9.



  However, it is of course possible to regulate the absorption of the solvent by the air in many other ways as well, for example by supplying solvent directly to the air contained in the chamber or by withdrawing it from it.



   CLAIMS
1. Installation or apparatus for assembling under pressure two ends of film coated with a solvent, characterized by two air-permeable jaws exerting the assembly pressure.


    

Claims (1)

2. Installation suivant revendication 1, caractérisée' en ce que les mordaches sont traversées d'un grand nombre de fins canaux, qui mettent en communication la surface de serrage avec la surface extérieure des mordaches, en particulier avec la surface postérieure. 2. Installation according to claim 1, characterized 'in that the jaws are crossed by a large number of fine channels, which put the clamping surface in communication with the outer surface of the jaws, in particular with the posterior surface. 3. Installation suivant revendication 1, caractérisée en ce que les mordaches sont constituées d'une matière première de structure spongieuse. 3. Installation according to claim 1, characterized in that the jaws consist of a raw material of spongy structure. 4. Installation suivant revendication 1-3, caractérisée en ce que les mordaches sont entourées d'une chambre, qui est pour- vue d'une installation pour le réglage du degré d'absorption <Desc/Clms Page number 5> du solvant par l'air. 4. Installation according to claim 1-3, characterized in that the jaws are surrounded by a chamber, which is provided with an installation for adjusting the degree of absorption. <Desc / Clms Page number 5> of the solvent by air.
BE433913D BE433913A (en)

Publications (1)

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BE433913A true BE433913A (en)

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ID=93191

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BE433913D BE433913A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0985517A1 (en) * 1993-03-24 2000-03-15 Pall Corporation Method for bonding a porous medium to a substrate

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0985517A1 (en) * 1993-03-24 2000-03-15 Pall Corporation Method for bonding a porous medium to a substrate

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