BE516712A - - Google Patents

Info

Publication number
BE516712A
BE516712A BE516712DA BE516712A BE 516712 A BE516712 A BE 516712A BE 516712D A BE516712D A BE 516712DA BE 516712 A BE516712 A BE 516712A
Authority
BE
Belgium
Prior art keywords
welding
joint
plastic material
parts
machine
Prior art date
Application number
Other languages
French (fr)
Publication of BE516712A publication Critical patent/BE516712A/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
    • 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
    • B29C65/04Dielectric heating, e.g. high-frequency welding, i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
    • 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
    • B29C66/345Progressively making the joint, e.g. starting from the middle
    • B29C66/3452Making complete joints by combining partial 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
    • 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
    • B29C66/70General 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
    • B29C66/73General 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
    • B29C66/739General 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
    • B29C66/7392General 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
    • B29C66/73921General 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
    • 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
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/732Floor coverings

Landscapes

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

Description

       

   <Desc/Clms Page number 1> 
 



   PROCEDE DE SOUDAGE. 



   La présente invention est relative à un procédé de soudage par rapprochement de bandes de matière. plastique souple, utilisées pour recouvrir des parquets. 



   Il est connu de recouvrir des parquets de matière plastique souple qui est manufacturée sous la forme de bandes. Pour ce faire, on réalise des pièces de cette matière ayant la forme et les dimensions des surfaces à recouvrir. Ces pièces sont obtenues en soudant par rapprochement des portions de bande. Jusqu'à présent, on a opéré le soudage en plaçant jointivement les éléments mis à l'envers et en appuyant sur les joints ainsi.'formés un fer à souder électrique que l'on déplace le long de ces joints au fur et à mesure que la matière s'y fond pour redevenir ensuite solide. On soude ainsi la matière sur une partie de son épaisseur, qui peut atteindre environ cinquante pour cent. Mais ce procédé présente de multiples inconvénients..

   Le soudage est fait à l'estime et sa qualité dépend essentiellement de l'habilité de l'exécutant qui, en tout état de cause, peut être en défaut de vigilance. Des endroits de moindre résistance peuvent ainsi subsister qui, par la suite, donnent lieu à des déchirures dont la réparation est toujours très aléatoire. De plus, l'application parfois trop brutale du fer chaud provoque des   décanpositions   locales de la matière plastique, qui déterminent également des endroits de moindre résistance. Au surplus, toute décomposition de la matière plastique est accompagnée d'un dégagement de gaz délétères. 



   On a tenté d'obvier, au moins partiellement, aux inconvénients indiqués ci-avant.   Notamnent,   on a essayé de renforcer les assemblaged des morceaux de matière plastique par l'application de couvre-joints faits de bandelette de même matière et fixés par soudure. Mais cette disposition complique le travail sans apporter de plus heureux résultats, les possibilités de soudage défectueux subsistant. On a également essayé de consolider les joints au moyen de bandelettes de tissu qu'on a incrustées dans les éléments jointifs lors du soudage. Mais la chaleur du fer cause le grésillement du tissu dont la résistance est pratiquement anéantie. En outre, cette dernière façon de faire est 

 <Desc/Clms Page number 2> 

 nécessairement plus lente. 



   La présente invention a pour but de,remédier efficacement aux inconvénients signalés. 



   A cet effet, dans le procédé de soudage suivant l'invention, les parties de matière plastique à assembler l'une à l'autre, sont amenées sur le plateau d'une machine à souder électronique   où.   elles sont maintenues jointivement pour être mises au contact de l'électrode mobile de cette machine, qui est abaissée sur leur joint pour y souder la matière plastique, ce joint étant déplacé progressivement pour réaliser d'un bout à l'autre le soudage qui est   o-   péré par parties. 



   D'autres détails et particularités de l'invention ressortiront de la description du procédé de soudage, donnée ci-après à titre d'exemple non limitatif. 



   Les parties de matière plastique à assembler l'une à l'autre, sont amenées sur le plateau d'une machine à souder électronique pour y reposer sur l'endroit Les éléments venant en contiguité, sont ainsi placés   successi-   vement cote à cote, de manière que chaque joint formé puisse être déplacé sous l'électrode mobile de la machine. Ils sont maintenus jointivement. Pour opérer le soudage désiré, il suffit d'abaisser l'électrode mobile sur le joint. On soude donc par parties, le joint étant déplacé progressivement sous l'électrode pour réaliser le soudage d'un bout à l'autre. 



   Le procédé suivant l'invention est particulièrement simple et pratique. Il ne nécessite aucun calcul, car le soudage proprement dit s'opère automatiquement et dans les conditions optima, à partir du moment où l'électrode mobile est abaissée et est au contact de la matière plastique. Aucune décomposition de cette dernière n'est à craindre, la température de soudage étant progressivement atteinte d'une manière stricte et sans crainte de   dépassement.   



  De ce fait, la matière plastique ne subit aucune détérioration et aucun déga-   gement   gazeux n'accompagne l'opération. Le procédé suivant l'invention n'est donc, en rien, contraire à l'hygiène. De plus, la matière plastique étant serrée entre deux électrodes, le soudage est réalisé sur toute son épaisseur. Etant donné l'uniformité absolue du résultat, aucune déchirure n'est à craindre. 



  De plus,la parfaite régularité du soudage donne un assemblage pratiquement invisible. En bref, le procédé suivant l'invention est de haute qualité. 



   Il doit   4tre   entendu que l'invention n'est nullement limitée à la réalisation décrite ci-avant et que bien des modifications peuvent y être apportées sans sortir du cadre de la présente demande de brevet. 



   On pourrait, notamment, napper le plateau de la machine, d'une pièce de substance protectrice, pour parer à toute éventualité de dégradation de ce plateau, qui pourrait résulter du rapprochement des électrodes. 



   REVENDICATIONS 
 EMI2.1 
 =======================:=== 
1. Procédé de soudage par rapprochement de bandes de matière plastique souple,utilisées pour recouvrir des parquets, caractérisé en ce que les parties à assembler l'une à l'autre, sont amenées sur le plateau d'une machine à souder électronique où elles sont maintenues jointivement pour être mises au contact de 1'électrode mobile de cette machine, qui est abaissée sur leur joint pour y souder la matière plastique, ce joint étant déplacé progressivement pour réaliser d'un bout à l'autre le soudage qui est opéré par parties. 

**ATTENTION** fin du champ DESC peut contenir debut de CLMS **.



   <Desc / Clms Page number 1>
 



   WELDING PROCESS.



   The present invention relates to a method of welding by bringing together strips of material. flexible plastic, used to cover parquet floors.



   It is known to cover parquet floors with flexible plastic material which is manufactured in the form of strips. To do this, parts are made of this material having the shape and dimensions of the surfaces to be covered. These parts are obtained by welding by bringing together portions of the strip. Until now, the welding has been carried out by placing together the elements put upside down and by pressing on the joints thus. 'Formed an electric soldering iron which is moved along these joints as and when that the matter melts there and then becomes solid again. The material is thus welded over part of its thickness, which can reach about fifty percent. But this process has multiple drawbacks.

   Welding is done by dead reckoning and its quality depends essentially on the skill of the workman who, in any event, may be lacking vigilance. Places of less resistance may thus remain which, subsequently, give rise to tears, the repair of which is always very uncertain. In addition, the sometimes too brutal application of the hot iron causes local decanpositions of the plastic material, which also determines places of least resistance. In addition, any decomposition of the plastic material is accompanied by the release of deleterious gases.



   An attempt has been made to obviate, at least partially, the drawbacks indicated above. In particular, attempts have been made to strengthen the assemblages of the pieces of plastic material by applying joint covers made of strips of the same material and fixed by welding. But this arrangement complicates the work without bringing better results, the possibilities of defective welding remaining. An attempt has also been made to consolidate the joints using strips of fabric which have been embedded in the joint elements during welding. But the heat of the iron causes the fabric to sizzle, and its resistance is virtually destroyed. Besides, this last way of doing things is

 <Desc / Clms Page number 2>

 necessarily slower.



   The object of the present invention is to effectively remedy the drawbacks mentioned.



   To this end, in the welding process according to the invention, the parts of plastic material to be assembled together are brought onto the plate of an electronic welding machine where. they are held together so as to be brought into contact with the mobile electrode of this machine, which is lowered onto their joint to weld the plastic thereon, this joint being moved progressively to carry out from one end to the other the welding which is o-operated in parts.



   Other details and features of the invention will emerge from the description of the welding process, given below by way of non-limiting example.



   The plastic parts to be assembled to one another are brought onto the plate of an electronic welding machine to rest on the place. The elements coming into contiguity are thus placed successively side by side, so that each joint formed can be moved under the movable electrode of the machine. They are held together. To perform the desired welding, it suffices to lower the movable electrode on the joint. We therefore weld in parts, the joint being gradually moved under the electrode to perform the welding from one end to the other.



   The method according to the invention is particularly simple and practical. It does not require any calculation, because the actual welding takes place automatically and under optimum conditions, from the moment when the mobile electrode is lowered and is in contact with the plastic material. No decomposition of the latter is to be feared, the welding temperature being gradually reached in a strict manner and without fear of being exceeded.



  As a result, the plastic material does not undergo any deterioration and no gas evolution accompanies the operation. The process according to the invention is therefore in no way contrary to hygiene. In addition, the plastic material being clamped between two electrodes, welding is carried out over its entire thickness. Given the absolute uniformity of the result, no tearing is to be feared.



  In addition, the perfect regularity of the welding gives a practically invisible assembly. In short, the process according to the invention is of high quality.



   It should be understood that the invention is in no way limited to the embodiment described above and that many modifications can be made to it without departing from the scope of the present patent application.



   One could, in particular, coat the plate of the machine, with a piece of protective substance, to avoid any possible degradation of this plate, which could result from the bringing together of the electrodes.



   CLAIMS
 EMI2.1
 ========================: ===
1. Method of welding by approximation of strips of flexible plastic material, used for covering parquet floors, characterized in that the parts to be assembled to one another, are brought onto the plate of an electronic welding machine where they are held together so as to be brought into contact with the movable electrode of this machine, which is lowered onto their joint to weld the plastic thereon, this joint being moved progressively in order to carry out from one end to the other the welding which is carried out by parts.

** ATTENTION ** end of DESC field can contain start of CLMS **.


    

Claims (1)

2. Procédé tel que décrit ci-avant. **ATTENTION** fin du champ CLMS peut contenir debut de DESC **. 2. Process as described above. ** CAUTION ** end of field CLMS may contain start of DESC **.
BE516712D BE516712A (en)

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