FR2532240A1 - Welding head for assembling plastic elements. - Google Patents
Welding head for assembling plastic elements. Download PDFInfo
- Publication number
- FR2532240A1 FR2532240A1 FR8214929A FR8214929A FR2532240A1 FR 2532240 A1 FR2532240 A1 FR 2532240A1 FR 8214929 A FR8214929 A FR 8214929A FR 8214929 A FR8214929 A FR 8214929A FR 2532240 A1 FR2532240 A1 FR 2532240A1
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- Prior art keywords
- teeth
- failure according
- welding
- edges
- edge
- Prior art date
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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
- B29C66/01—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
- B29C66/114—Single butt joints
- B29C66/1142—Single butt to butt 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
- 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
- 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
- B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
- B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
- B29C66/1312—Single flange to flange joints, the parts to be joined being rigid
-
- 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
- B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
- B29C66/137—Beaded-edge joints or bead seals
-
- 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
- B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
- B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the 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
- B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the 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 comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
- B29C66/81429—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the 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 comprising a single ridge, e.g. for making a weakening line; comprising a single tooth comprising a single tooth
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B17/00—Other machines, apparatus, or methods for packaging articles or materials
- B65B17/02—Joining articles, e.g. cans, directly to each other for convenience of storage, transport, or handling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one axis
Abstract
Description
La présente invention a pour objet une panne de soudage destinée en particulier, mais non exclusivement, à la soudure bord à bord de récipients en matière plastique tels que des pots de yaourt, en vue de leur groupage en un nombre déterminé d'unités
Un procédé de groupage dans lequel peut être employée au moins une panne selon l'invention est décrit dans le Brevet Français N 78 23468 du 9 Aout 1978 au nom de MOMOPLASTo Dans ce brevet9 les récipients sont de forme générale tronconiques et présentent à leur partie supérieure une collerette carrée ou plus généralement polygonale s'étendant dans un plan perpendiculaire à l'axe du récipient.Le groupage des récipients se fait par réunion de certains bords des collerettes avec les bords de récipients adjacents0 Différents moyens sont indiqués pour obtenir cette réunion et, en particulier le thermosoudage ou thermocompression qui provoque par la double action de la chaleur et de la pression une fusion au moins superflcielle9des bords des deux collerettes adjacentes qui9 après refroidissement, se trouvent solidari sées.The subject of the present invention is a welding tip intended in particular, but not exclusively, for edge-to-edge welding of plastic containers such as yogurt pots, with a view to grouping them into a determined number of units.
A grouping process in which at least one purlin according to the invention can be used is described in French Patent N 78 23468 of August 9, 1978 in the name of MOMOPLASTo In this patent9 the containers are of generally frustoconical shape and have at their upper part a square or more generally polygonal flange extending in a plane perpendicular to the axis of the container. The containers are grouped by joining certain edges of the flanges with the edges of adjacent containers0 Different means are indicated to obtain this meeting and, in particular the heat-sealing or thermocompression which causes by the double action of heat and pressure an at least superficial melting of the edges of the two adjacent flanges which, after cooling, are joined together.
En vue de réaliser une automatisation du procédé 9 les pots ou récipients sont réalisés par thermofonnage ou injection de polystyrène ou de polypropylène ce qui permet deobtenir des cotes précises9 nécessaires au traitement sur machine. Il est ainsi possible de souder les pots bord à bord. In order to automate the process 9 the pots or containers are made by thermoforming or injection of polystyrene or polypropylene which allows to obtain precise dimensions9 necessary for the treatment on machine. It is thus possible to weld the pots edge to edge.
On a constaté que tant que la panne de soudure par thermocompression n#excédait pas une température de l'ordre de i60#C9 I# opération de thermocompression ne présentait aucune difficulté. Par contre au-delà de cette valeur, la panne a tendance à adhérer sur la matière en fusion et des filages se produisent entre la soudure et la panne lors du retrait de celle-ci Malheureusement, il n'est pas possible d'augmenter la pression d'une manière de manière significative et une température de l'ordre de 1600C est incompatible, dans certains cas, avec les cadences des machines permettant le groupage de plusieurs récipients. It has been found that as long as the soldering failure by thermocompression does not exceed a temperature of the order of i60 # C9 I # thermocompression operation does not present any difficulty. On the other hand, beyond this value, the breakdown tends to adhere to the molten material and spinning occurs between the welding and the breakdown when the latter is removed. Unfortunately, it is not possible to increase the pressure in a significant way and a temperature of the order of 1600C is incompatible, in certain cases, with the rates of the machines allowing the grouping of several containers.
Les pannes de soudage, généralement en métal ou alliage bon conducteur de la chaleur, se composent généralement d'un corps creux dont la température est régulée par tout moyen adapté à partir de laquelle fait saillie une arête continue dont la longueur est égale à la longueur de la ligne de soudure désirée. Cette arête présente un relief en creux, par exemple -en "V" renversé qui forme une sorte de moule pour la matière fondue, qui, du fait de la pression a tendance à remonter vers l'extérieur, dans la direction opposée à la direction de pénétration de l'arête dans la matière. Soldering tips, generally made of metal or alloy which is a good heat conductor, generally consist of a hollow body whose temperature is regulated by any suitable means from which protrudes a continuous edge whose length is equal to the length of the desired weld line. This edge has a hollow relief, for example -in inverted "V" which forms a kind of mold for the molten material, which, due to the pressure tends to rise towards the outside, in the direction opposite to the direction penetration of the edge into the material.
Pour remédier au défaut mentionné précédemment, on a déjà proposé de revêtir l'arête ou la partie inférieure de la panne d'une couche de matériau à faible coefficient de frottement tel que du téflon, par exemple. Malheureusement, compte tenu de la pression appliquée, ce matériau est soumis à une forte abrasion et les pannes de soudage doivent être remplacées au bout de quelques heures de fonctionnement ce qui provoque une perte considérable de temps et par suite un abaissement du rendement de la machine;;
De plus, on a obserorég avec des pots en polystyrène des ruptures de la soudure lors du reBroxdissementO
La présente invention a pour but de pallier les inconvénients mentionnés ci-desss,
Selon la présente invention, la panne de soudage, pour matières plastiques,par thermocompression, comprenant un corps thermorégulé, est caractérisée en ce que au moins deux dents font saillie à partir dudit corps.To remedy the aforementioned defect, it has already been proposed to coat the edge or the lower part of the purlin with a layer of material with a low coefficient of friction such as Teflon, for example. Unfortunately, given the pressure applied, this material is subject to high abrasion and the welding tips must be replaced after a few hours of operation which causes a considerable loss of time and consequently a reduction in the efficiency of the machine. ;;
In addition, we observed with polystyrene pots breaks in the weld during reBroxdissementO
The aim of the present invention is to overcome the drawbacks mentioned above,
According to the present invention, the soldering tip, for plastics, by thermocompression, comprising a thermoregulated body, is characterized in that at least two teeth protrude from said body.
Selon une autre caractéristique de l'invention, les dents précitées sont de dimensions croissantes de l'avant vers l'arrière de la panne. According to another characteristic of the invention, the aforementioned teeth are of increasing dimensions from the front to the rear of the tip.
La principale caractéristique de l'invention réside en ce que les parties de la panne appellées à pénétrer dans la matière doivent être discontinues. En effet, cette caractéristique permet d'obtenir sur une même dent des régions très chaudes et des régions relativement froides
Le contact de l'extremité avant des dents avec les deux surfaces de plastique, bord à bord,provoque un ramollissement de la matière, puis la compression provoque un fluage de celle-ci. Lorsque la panne continue sa pénétration, au moins une partie de la matière en fluage vient eh contact avec les zones froides.Le refroidissement de cette matière est instantané et il se produit une rétraction de celle-ci qui évite toute adhérence entre la panne et le plastique
Des résultats satisfaisants ont été obtenus avec une panne selon l'invention portée à une température de l'ordre de 300 C, la soudure étant effectuée en une fraction de seconde, ce qui est compatible avec le cadencement des machines modernes.The main characteristic of the invention resides in that the parts of the tip called to penetrate the material must be discontinuous. This characteristic makes it possible to obtain very hot regions and relatively cold regions on the same tooth.
Contact of the front end of the teeth with the two plastic surfaces, edge to edge, causes a softening of the material, then compression causes it to creep. When the tip continues to penetrate, at least part of the material in creep comes into contact with the cold zones. The cooling of this material is instantaneous and there is a retraction of this which avoids any adhesion between the tip and the plastic
Satisfactory results have been obtained with a breakdown according to the invention brought to a temperature of the order of 300 C, the welding being carried out in a fraction of a second, which is compatible with the timing of modern machines.
D'autres caractéristiques et avantages de l'inven- tion apparattront au cours de la description qui va suivre de modes de réalisation particuliersS donnés uniquement à titre d'exemples non limitatifs9 en regard des figures qui représentent: - La Fig.1, un groupage de deux pots de yaourt selon le
Brevet Français précité; - La Fig02, une soudure réalisée avec une panne selon
la technique antérieure; - La Fig03# une vue d'une panne selon l1invention; - Les Figs 4 à 69 des exemples de soudures obtenues avec
des pannes selon l'invention;; - 'La Fig.7, une panne selon l#inve#tion0
Sur la Fige 15 deux pots de yaourt 1 sont réunis en 4 par soudure des bords correspondants de leur collerette 2. La soudure doit entre assez résistante pour maintenir les pots groupés leur de leur manutention9 mais elle doit etre assez faible pour permettre leur séparation en vus de la consommation, La ligne de soudure 4 doit ainsi constituer une ligne de moindre résistance.Other characteristics and advantages of the invention will appear during the description which follows of particular embodiments given only by way of nonlimiting examples9 with reference to the figures which represent: - Fig.1, a grouping two jars of yogurt depending on the
French patent cited above; - Fig02, a weld produced with a fault according to
the prior art; - Fig03 # a view of a breakdown according to the invention; - Figs 4 to 69 of examples of welds obtained with
breakdowns according to the invention; - 'Fig.7, a failure according to inve # tion0
On Fige 15 two yoghurt pots 1 are joined at 4 by welding the corresponding edges of their flange 2. The solder must be strong enough to keep the pots grouped while handling them9 but it must be weak enough to allow them to be seen apart consumption, The weld line 4 must thus constitute a line of least resistance.
Sur la Fig.2 est représentée une panne lO > de type connu,lors de la soudure de deux collerettes adjacentes 2. Elle comprend à sa partie inférieure une arete 109 régulée en température et qui applique une pression sur les collerettes 2. Elle présente à son extremité une échancrure en "V" 3 qui est destinée à maintenir la matière fluant vers le haut, en direction opposée à celle de la pression. In Fig.2 is shown a fault 10> of known type, during the welding of two adjacent flanges 2. It comprises at its lower part an edge 109 regulated in temperature and which applies pressure to the flanges 2. It presents its extremity a notch in "V" 3 which is intended to maintain the material flowing upwards, in the direction opposite to that of the pressure.
Malheureusement, la matière, à l'état pâteux, vient en contact avec des parties chaudes, puisque, du fait de la continuité de la panne, la température est sensiblement uniforme. Il en résulte des adhérences et des collages qui interdisent un fonctionnement satisfaisant.Unfortunately, the material, in the pasty state, comes into contact with hot parts, since, due to the continuity of the breakdown, the temperature is substantially uniform. This results in adhesions and bonding which prohibits satisfactory operation.
La Fig.#3 représente une panne selon l'invention qui est constituée d'un corps 10 régulé en température, se prolongeant à sa partie inférieure par des éléments discontinus 3 ou dents, qui, dans l'exemple représenté sont de forme tronconique. Comme précédemment, une pression est appliquée du haut vers le bas de la figure, par des vérins pneumatiques, par exemple, et les dents espacées l'une de l'autre pénètrent sur une partie de l'épaisseur des collerez tes 2. Comme expliqué précédemment, l'action de chacune des dents est locale et il en résulte que la surface de la liaison entre les pots contigüs est moins perturbée que dans le cas d'une électrode continue. La matière remonte contre les parois externes de chaque dent qui sont légèrement plus froides que la partie interne.A ce contact la matière se refroidit, se rétreint et par suite n'adhère pas à la dent qui peut se dégager librement. Fig. # 3 shows a purlin according to the invention which consists of a body 10 regulated in temperature, extending at its lower part by discontinuous elements 3 or teeth, which, in the example shown are of frustoconical shape. As before, pressure is applied from the top to the bottom of the figure, by pneumatic cylinders, for example, and the teeth spaced apart from each other penetrate part of the thickness of the sticks 2. As explained previously, the action of each of the teeth is local and it follows that the surface of the connection between the adjoining pots is less disturbed than in the case of a continuous electrode. The material goes up against the external walls of each tooth which are slightly cooler than the internal part.At this contact the material cools, shrinks and consequently does not adhere to the tooth which can be released freely.
Les Figs 4 à 6 représentent , en vue par dessus, des exemples de configurations de points ou traits de soudure qui peuvent etre obtenues avec des pannes selon l'invention. Figs 4 to 6 show, in top view, examples of configurations of points or weld lines which can be obtained with purlins according to the invention.
Sur la Fig.4, la configuration est celle qui est obtenue avec une panne du type de celle qui est représentée sur la
Fig.3, c'est à dire que la ligne 4 formée par les bords des collerettes 2 présente une série de points de soudure, ces points étant obtenus sans apport de matière extérieure.In Fig. 4, the configuration is that obtained with a breakdown of the type shown in the
Fig.3, that is to say that the line 4 formed by the edges of the flanges 2 has a series of weld points, these points being obtained without the addition of external material.
Sur la Fig.5, les points de soudure 5 sont disposés en quinconce de part et d'autre de la ligne 4.In Fig.5, the welding points 5 are staggered on either side of the line 4.
Sur la Fig.6, les points de soudure sont remplacés par différentes configurations de petits traits, qui peuvent avoir différentes inclinaisons par rapport au bord commun 4 des collerettes, ou lui être parallèles. Sur la gauche de la Fig.6, les points de soudure sont remplacés par des traits en "zigzag" qui peuvent être adjacents ou non.In Fig.6, the weld points are replaced by different configurations of small lines, which may have different inclinations relative to the common edge 4 of the flanges, or be parallel thereto. On the left of Fig.6, the weld points are replaced by "zigzag" lines which may or may not be adjacent.
Sont également possibles,comme représenté au centre de la Fig.6, une forme en créneau ou en grecque, soit encore comme représenté à droite une forme en oméga renversé0
Il est bien évident que l'invention n'est pas limitée à une forme particulière de section de panne et que de nombreuses autres formes peuvent entre mises en oeuvre0 Toutefois, lorsque l'arête de la panne est une ligne continue9 cette ligne doit obligatoirement étire une ligne brisée de manière à ce qu'apparaissent sur ses faces des gradients de tempéra bure qui comme il a été d précédemment provoquent un rétreint de la matière évitant l'adhérence de celle-ci sur la panne
La Fig07 représente une panne selon l'invention, comprenant un corps 10 a partir duquel font saillie des dents 3 qui, dans l'exemple représenté, sont au nombre de huits Conformément à une caractéristique de l'inve#tion, ces dents sont pointues ce qui facilite leur pénétration à l'intérieur des collerettes et provoque la formation d'une ligne pointillée de plus faible résistance permettant un détachement facile des po#s. Also possible, as shown in the center of Fig. 6, a square or Greek shape, or as shown on the right, a reverse omega shape0
It is obvious that the invention is not limited to a particular form of purlin section and that many other forms can be implemented. However, when the edge of the purlin is a solid line9 this line must necessarily stretch a broken line so that there appear on its faces temperature gradients which as it was previously d cause a shrinking of the material avoiding the adhesion of the latter on the purlin
Fig07 shows a fault according to the invention, comprising a body 10 from which protrude teeth 3 which, in the example shown, are eight in number. According to a characteristic of the invention, these teeth are pointed. which facilitates their penetration inside the flanges and causes the formation of a dotted line of lower resistance allowing easy detachment of the po # s.
Dans les exemples qui viennent d'être donnés lgarete de la panne est constituée de dents 3 de formes variables mais dont les surfaces inférieures ne sont pas organisées en une surface rectiligne et continue. In the examples which have just been given, the tip of the purlin consists of teeth 3 of variable shapes but whose lower surfaces are not organized into a rectilinear and continuous surface.
Conformément à l'invention, une telle électrode peut être utilisée à condition de prévoir sur les bords des collerettes un ensemble de petits picots verticaux ou plus généralement perpendiculaires à la surface de chaque collerette. La discontinuité de surface de la panne est alors remplacée par une discontinuité des surfaces à souder. According to the invention, such an electrode can be used provided that a set of small vertical pins or more generally perpendicular to the surface of each collar is provided on the edges of the flanges. The surface discontinuity of the tip is then replaced by a discontinuity of the surfaces to be welded.
Les pannes selon l'invention peuvent être utilisées aussi bien pour souder les collerettes bord à bord par le dessus que par le dessous, que ces bords présentent ou non un repli comme indiqué dans le Brevet Français précité ou encore des picots verticaux,
il va de soi que de nombreuses variantes peuvent être introduites, notamment par substitution de moyens techniques équivalents, sans sortir pour celà du cadre de l'invention. The purlins according to the invention can be used both for welding the flanges edge to edge from above and from below, whether or not these edges have a fold as indicated in the aforementioned French Patent or vertical spikes,
It goes without saying that many variants can be introduced, in particular by substitution of equivalent technical means, without departing from the scope of the invention.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8214929A FR2532240A1 (en) | 1982-09-01 | 1982-09-01 | Welding head for assembling plastic elements. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8214929A FR2532240A1 (en) | 1982-09-01 | 1982-09-01 | Welding head for assembling plastic elements. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2532240A1 true FR2532240A1 (en) | 1984-03-02 |
Family
ID=9277167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8214929A Withdrawn FR2532240A1 (en) | 1982-09-01 | 1982-09-01 | Welding head for assembling plastic elements. |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2532240A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010063834A3 (en) * | 2008-12-05 | 2010-10-21 | F. Hoffmann-La Roche Ag | Method for manufacturing a reagent container collective and reagent container collective |
| WO2014125224A1 (en) | 2013-02-15 | 2014-08-21 | Erca | Conditioning of a group of at least two plastic containers |
-
1982
- 1982-09-01 FR FR8214929A patent/FR2532240A1/en not_active Withdrawn
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010063834A3 (en) * | 2008-12-05 | 2010-10-21 | F. Hoffmann-La Roche Ag | Method for manufacturing a reagent container collective and reagent container collective |
| CN102227303A (en) * | 2008-12-05 | 2011-10-26 | 霍夫曼-拉罗奇有限公司 | Method for manufacturing reagent container assembly and reagent container assembly |
| US9149979B2 (en) | 2008-12-05 | 2015-10-06 | Roche Diagnostics Operations, Inc. | Method for producing a reagent container assembly and reagent container assembly |
| CN102227303B (en) * | 2008-12-05 | 2016-05-11 | 霍夫曼-拉罗奇有限公司 | For the manufacture of method and the reagent container assembly of reagent container assembly |
| WO2014125224A1 (en) | 2013-02-15 | 2014-08-21 | Erca | Conditioning of a group of at least two plastic containers |
| FR3002207A1 (en) * | 2013-02-15 | 2014-08-22 | Erca | PACKAGING OF A GROUP OF AT LEAST TWO PLASTIC CONTAINERS |
| CN104995012A (en) * | 2013-02-15 | 2015-10-21 | 埃尔卡公司 | Conditioning of a group of at least two plastic containers |
| JP2016515070A (en) * | 2013-02-15 | 2016-05-26 | エルカＥｒｃａ | Packaging of a group of containers consisting of at least two containers made of plastic material |
| CN104995012B (en) * | 2013-02-15 | 2018-02-13 | 埃尔卡公司 | Packaging for one group of at least two container made of plastic material |
| US10486371B2 (en) | 2013-02-15 | 2019-11-26 | Erca | Packaging for a group of at least two containers made of plastics material |
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| ST | Notification of lapse |