FR2541176A1 - Apparatus for synchronising the cross-sectional variations of a profile, in particular of a seal for motor-vehicle bodies, with the advancing of the profile in an extruder, and extruder equipped with this apparatus - Google Patents
Apparatus for synchronising the cross-sectional variations of a profile, in particular of a seal for motor-vehicle bodies, with the advancing of the profile in an extruder, and extruder equipped with this apparatus Download PDFInfo
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- FR2541176A1 FR2541176A1 FR8318933A FR8318933A FR2541176A1 FR 2541176 A1 FR2541176 A1 FR 2541176A1 FR 8318933 A FR8318933 A FR 8318933A FR 8318933 A FR8318933 A FR 8318933A FR 2541176 A1 FR2541176 A1 FR 2541176A1
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- profile
- extrusion head
- extruder
- rotary member
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- 238000001125 extrusion Methods 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 5
- 238000004049 embossing Methods 0.000 claims description 9
- 239000012809 cooling fluid Substances 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 2
- 235000012438 extruded product Nutrition 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 235000012773 waffles Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/06—Sealing strips
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/302—Extrusion nozzles or dies being adjustable, i.e. having adjustable exit sections
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
- B60J10/00—Sealing arrangements
- B60J10/20—Sealing arrangements characterised by the shape
- B60J10/22—Sealing arrangements characterised by the shape having varying cross-section in the longitudinal direction
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92009—Measured parameter
- B29C2948/92076—Position, e.g. linear or angular
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92009—Measured parameter
- B29C2948/92085—Velocity
- B29C2948/92095—Angular velocity
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92009—Measured parameter
- B29C2948/92114—Dimensions
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92571—Position, e.g. linear or angular
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92609—Dimensions
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92923—Calibration, after-treatment or cooling zone
Abstract
Description
La présente invention a trait à un appareil pour synchroniser les variations de section d'un profilé, en particulier d'une garniture étanche pour carrosseries d'automobiles avec l'avancement de ce profilé dans une extrudeuse équipée de moyens de régulation capables, lorsqu'on les actionne, de modifier la section de l'orifice de la tête d'extrusion. The present invention relates to an apparatus for synchronizing the cross-sectional variations of a profile, in particular of a tight seal for automobile bodies with the advancement of this profile in an extruder equipped with capable regulation means, when they are activated, to modify the section of the orifice of the extrusion head.
On emploie couramment sur les carrosseries d'automobiles des garnitures d'étanchéité en un matériau élastomère, compact ou cellulaire, ou de type composite, qu'on applique sur le rebord des ouvertures ou éléments de fermeture tels que portes, portières, etc... Sealings made of an elastomeric, compact or cellular material, or of the composite type, are commonly used on automobile bodies, which are applied to the edge of openings or closing elements such as doors, doors, etc. .
Pour garantir une bonne étanchéité sur tout le pourtour où vient s'appliquer la garniture, en particulier aux endroits critiques, ceux par exemple où le profilé qui doit recevoir la garniture marque de brusques changements de courbure, on a proposé de réaliser la garniture en plusieurs tronçons successifs ayant des longueurs prédéterminées, destinés, chacun, à la partie correspondante prévue à cet effet, et capables de garantir l'étanchéité de la partie du pourtour de l'ouverture ou de la portière qui doit les recevoir individuellement. To guarantee a good seal around the entire periphery where the lining is applied, in particular in critical places, those for example where the profile which is to receive the lining marks sudden changes in curvature, it has been proposed to make the lining in several successive sections having predetermined lengths, each intended for the corresponding part provided for this purpose, and capable of guaranteeing the tightness of the part of the periphery of the opening or of the door which must receive them individually.
Il est parfois intéressant de réaliser des garnitures à section modifiée par rotations prédéterminées pour des raisons d'ordre purement esthétique. It is sometimes interesting to produce seals with a modified section by predetermined rotations for purely aesthetic reasons.
Pour améliorer l'aspect extérieur de la carrosserie portant ce type de garniture, il peut être utile de conférer à certaines portions longitudinales de la garniture une section ou un profil différencié par rapport à la partie restante.To improve the external appearance of the bodywork carrying this type of lining, it may be useful to give certain longitudinal portions of the lining a section or a profile differentiated from the remaining part.
On a proposé tans ce but de réaliser par extrusion continue des garnitures étanches à section transversale essentiellement constante. Les variations de section locales du profil de la garniture s'obtenaient ensuite par des opérations de coupe ou de découpage à l1emporte-pièce de certaines parties de la garniture. It has been proposed for this purpose to produce by continuous extrusion seals with an essentially constant cross section. Variations in the local section of the trim profile were then obtained by cutting or punching out parts of the trim.
Cette façon de procéder a des inconvénients variés. Elle implique avant tout un gaspillage non négligeable de matière. En second lieu, faire varier la section de la garniture par coupe ou découpage à l'emporte-pièce entraîne une perte de temps considérable et contribue par conséquent à l'augmentation du prix de revient du produit fini. This procedure has various drawbacks. Above all, it involves a significant waste of material. Secondly, varying the section of the filling by cutting or punching out results in a considerable loss of time and consequently contributes to the increase in the cost price of the finished product.
En outre, si la garniture est formée entièrement ou en partie de matériau cellulaire, les variations de section ou de profil obtenues par découpage à l'emporte-pièce ou par coupe risquent d'être inacceptables en diminuant la qualité de la garniture du point de vue fonctionnel ou esthétique. En effet, aux endroits où la garniture a été coupée, la porosité superficielle favorise l'absorption d'humidité ou d'eau, au détriment de la longévité de la garniture et de son aspect extérieur. In addition, if the lining is formed entirely or partly of cellular material, the variations in section or profile obtained by punching or cutting may be unacceptable by reducing the quality of the lining of the stitch. functional or aesthetic view. Indeed, in places where the lining has been cut, the surface porosity promotes the absorption of moisture or water, to the detriment of the longevity of the lining and its external appearance.
La présente invention a pour but de permettre la réalisation, par extrusion continue et de façon simple, rapide, économique, précise et fiable d'un profilé présentant des parties successives de longueurs prédéterminées et à sections transversales correspondantes prédéterminées, à l'aide d'une tete d'extrusion pourvue de moyens de régulation capables, lorsqu'vils sont actionnés, de modifier la section de l'orifice d'extrusion. The object of the present invention is to allow the production, by continuous and simple, rapid, economical, precise and reliable extrusion of a profile having successive parts of predetermined lengths and with corresponding predetermined cross sections, using an extrusion head provided with regulating means capable, when they are actuated, of modifying the section of the extrusion orifice.
Cet objectif est atteint par notre invention, grâce à un appareil répondant au type ci-dessus spécifié, caractérisé principalement par le fait qu'il comprend
- un organe rotatif, destiné à être disposé à la sortie de la tête d'extrusion, avec sa périphérie au contact d'une portion au moins de la surface du profilé sortant de la tête, de telle sorte que l1avan- cement du profilé provoque une rotation de l'organe en question,
- un transducteur électrique de position, couplé avec l'organe rotatif et chargé de délivrer des signaux électriques indiquant la longueur d'avancement du profilé, et
- une unité de contrôle-commande reliée au transducteur de position et aux moyens de régulation ci-dessus, et prévue pour actionner ces moyens de régulation selon des modalités prédéterminées, en fonction des signaux émis par le transducteur de position.This objective is achieved by our invention, thanks to a device corresponding to the type specified above, characterized mainly by the fact that it comprises
- A rotary member, intended to be disposed at the outlet of the extrusion head, with its periphery in contact with at least a portion of the surface of the profile leaving the head, so that the advancement of the profile causes a rotation of the organ in question,
an electrical position transducer, coupled with the rotary member and responsible for delivering electrical signals indicating the length of advance of the profile, and
a control-command unit connected to the position transducer and to the above regulation means, and designed to actuate these regulation means according to predetermined methods, as a function of the signals emitted by the position transducer.
Pour plus de commodité, une autre caractéristique de l'invention prévoit que pour synchroniser dans une extrudeuse les variations de section avec la progression d'un produit extrudé, destiné à subir en aval de la tête d'extrusion une action de gaufrage superficiel au moyen dlune gaufreuse formée d'une roue à gaufres agissant sur une partie au moins de la surface du profilé, l'organe rotatif en question est constitué par la roue à gaufrer. For convenience, another characteristic of the invention provides that to synchronize in an extruder the variations in section with the progression of an extruded product, intended to undergo downstream of the extrusion head a surface embossing action by means dlune embosser formed of a waffle wheel acting on at least part of the surface of the profile, the rotary member in question is constituted by the embossing wheel.
D'autres caractéristiques et avantages de l'invention apparaîtront au cours de la description détaillée ci-après, qui renvoie aux dessins ci-joints fournis à titre d'exemple non limitatif, dans lesquels
- la figure 1 est le schéma d'une extrudeuse équipée d'un appareil conforme à l'invention,
- la figure 2 est une vue en perspective ff#une partie de l'appareil de la figure 1, et
- la figure 3 est une vue en coupe transversale selon l'axe III-III de la figure 1, d'un segment d'une garniture fabriquée avec l'appareil de la figure 1.Other characteristics and advantages of the invention will appear during the detailed description below, which refers to the attached drawings provided by way of non-limiting example, in which
FIG. 1 is the diagram of an extruder equipped with an apparatus according to the invention,
FIG. 2 is a perspective view ff # a part of the apparatus of FIG. 1, and
- Figure 3 is a cross-sectional view along the axis III-III of Figure 1, of a segment of a lining made with the apparatus of Figure 1.
En se référant à la figure 1, la référence 1 désigne dans son ensemble une tête d'extrusion d'une extrudeuse d'un type connu en soi. Cette tête comprend un corps 2, auquel sont raccordés deux conduits 3 et 4, par lesquels on envoie pendant le fonctionnement dans le corps 2 un matériau à extruder, par exemple un matériau élastomère, dans le sens indiqué par les flèches A et B. Referring to Figure 1, the reference 1 designates as a whole an extrusion head of an extruder of a type known per se. This head comprises a body 2, to which two conduits 3 and 4 are connected, through which a material to be extruded, for example an elastomeric material, is sent during operation into the body 2, in the direction indicated by the arrows A and B.
A l'une des extrémités du corps est fixée une filière 5, représentée de façon plus détaillée sur la figure 2.At one end of the body is fixed a die 5, shown in more detail in FIG. 2.
Cette filière comporte une ouverture ou orifice d'extrusion 6 (figure 2) qui donne à la matière extrudée la section transversale souhaitée.This die has an opening or extrusion orifice 6 (Figure 2) which gives the extruded material the desired cross section.
A l'extrémité opposée à la filière 5, le corps 2 est muni d'une #uverture d'entrée, indiquée par la référence 7 sur la figure 1, qui livre passage éventuellement à un ruban d'armature O, à noyer dans le profilé extrudé (figure 2)
Comme on le voit sur la figure 2, sur sa face avant libre la filière 5 porte deux rails de guidage 8 et 9 dans lesquels coulisse un obturateur 10. En particulier, cet obturateur peut subir des mouvements de translation dans le sens indiqué par la flèche C, au contact de la filière 5.At the end opposite to the die 5, the body 2 is provided with an inlet # opening, indicated by the reference 7 in FIG. 1, which eventually gives way to a reinforcing tape O, to be embedded in the extruded profile (figure 2)
As can be seen in FIG. 2, on its free front face the die 5 carries two guide rails 8 and 9 in which slides a shutter 10. In particular, this shutter can undergo translational movements in the direction indicated by the arrow C, in contact with the sector 5.
Dans l'exemple de réalisation représenté sur la figure 2, l'orifice d'extrusion 6 est essentiellement un rectangle dont le long côté supérieur porte une encoche sensiblement en forme de V. In the embodiment shown in Figure 2, the extrusion orifice 6 is essentially a rectangle whose long upper side carries a notch substantially in the form of V.
En fonctionnement, lorsque l'obturateur 10 se trouve dans la position illustrée en trait plein sur la figure 2, la tête d'extrusion 1 produit un profilé T à section transversale essentiellement rectangulaire, portant sur sa face supérieure une ailette d'étanchéité 15, comme le montre la figure 2. In operation, when the shutter 10 is in the position illustrated in solid lines in FIG. 2, the extrusion head 1 produces a section T with a substantially rectangular cross section, carrying on its upper face a sealing fin 15, as shown in figure 2.
Si, par contre, l'obturateur 10 est abaissé et se trouve par exemple dans la position indiquée par des traits discontinus sur la figure 2, le profil du produit extrudé T se présentera comme sur la figure 3, c1est-à-dire avec une ailette 15 moins proéminente autrement dit, de dimensions réduites. If, on the other hand, the shutter 10 is lowered and is for example in the position indicated by broken lines in FIG. 2, the profile of the extruded product T will appear as in FIG. 3, that is to say with a fin 15 less prominent in other words, of reduced dimensions.
Si on modifie la position de l'obturateur 10 par rapport à l'orifice d'extrusion 6, il sera possible de modifier à volonté la forme de la section transversale du profilé, et à la limite, de faire disparaître l'ailette d'étanchéité 15. If the position of the shutter 10 is modified relative to the extrusion orifice 6, it will be possible to modify the shape of the cross section of the profile at will, and ultimately, to make the fin disappear. sealing 15.
La tête d'extrusion décrite à titre d'exemple permet donc de réaliser par extrusion continue un profilé T, comme celui de la figure 1, autrement dit un profilé en trois parties ayant des longueurs respectives L1, L2 et L3 prédéterminées, correspondant chacune à une section respective prédéterminée. The extrusion head described by way of example therefore makes it possible by continuous extrusion to produce a profile T, like that of FIG. 1, in other words a profile in three parts having predetermined lengths L1, L2 and L3, each corresponding to a respective predetermined section.
Si le profilé T est une garniture d'étanchéité destinée à être appliquée sur le pourtour d'un élément ou d'une ouverture, il est extrêmement important que les variations de section soient vraiment réalisées aux endroits souhaités, afin d'assurer une liaison parfaite entre le joint et le pourtour de l'élément ou de l'ouverture, et de garantir ce faisant la meilleure étanchéité possible et/ou le meilleur résultat esthétique. If the T profile is a gasket intended to be applied around the perimeter of an element or an opening, it is extremely important that the section variations are really carried out at the desired locations, in order to ensure a perfect connection between the joint and the periphery of the element or opening, and thereby guaranteeing the best possible seal and / or the best aesthetic result.
En d'autres termes, il faut que le déplacement de l'obturateur 10 soit synchronisé avec l'avancement du profilé T. In other words, the movement of the shutter 10 must be synchronized with the advancement of the profile T.
Pour réaliser cette synchronisation, l'invention prévoit un organe rotatif, par exemple une roue, désigné par la référence 20 sur la figure 2, qu'on dispose en aval de la tête d'extrusion avec sa périphérie au contact d'une portion au moins de la surface du profilé T à sa sortie de la tête d'extrusion, de telle sorte que la progression du profilé provoque une rotation de cet organe rotatif autour d'un axe essentiellement orthogonal à la direction d'avancement du profilé. To achieve this synchronization, the invention provides a rotary member, for example a wheel, designated by the reference 20 in FIG. 2, which is arranged downstream of the extrusion head with its periphery in contact with a portion at less than the surface of the profile T at its exit from the extrusion head, so that the progression of the profile causes a rotation of this rotary member about an axis essentially orthogonal to the direction of advancement of the profile.
Dans l'exemple illustré, la roue 20 est portée par un support fourchu 21, au moyen d'un arbre télescopique extensible 22 relié à un support 23 qui est fixe par rapport à la tête d'extrusion. Un ressort hélicoïdal 24, qui entoure l'arbre 22 est chargé de maintenir la roue 20 au contact du profilé. In the example illustrated, the wheel 20 is carried by a forked support 21, by means of an extendable telescopic shaft 22 connected to a support 23 which is fixed relative to the extrusion head. A helical spring 24, which surrounds the shaft 22 is responsible for holding the wheel 20 in contact with the profile.
Pour plus de commodité, la périphérie de la roue 20 peut porter des dessins en relief ou des parties rehaussées, afin d'améliorer le contact entre la roue et le profilé et d'empêcher les dérapages. For convenience, the periphery of the wheel 20 can carry raised drawings or raised parts, in order to improve the contact between the wheel and the profile and to prevent skidding.
Si-par contre on souhaite que la garniture terminée ne présente pas d'impressions en creux, on place une buse entre la tête 1 et la roue 20. Par cette buse, on souffle un fluide de refroidissement (par exemple de l'azote) sur la garniture, de façon à provoquer son durcissement au moins partiel. If, on the other hand, it is desired that the finished lining does not have hollow impressions, a nozzle is placed between the head 1 and the wheel 20. By this nozzle, a cooling fluid is blown (for example nitrogen) on the packing, so as to cause it to harden at least partially.
De l'autre coté du profilé et faisant face à la roue 20, on a prévu une roue 25 tournant en sens contraire, qui peut servir d'entraînement grâce au moteur 26 (figure 2). On the other side of the profile and facing the wheel 20, there is provided a wheel 25 rotating in opposite directions, which can serve as a drive thanks to the motor 26 (Figure 2).
La roue 20, qui peut tourner librement dans son support 21, est reliée par une tige ou arbre 27 solidaire et coaxial, à un transducteur de position 28, par exemple un codeur rotatif. The wheel 20, which can rotate freely in its support 21, is connected by a rod or shaft 27 integral and coaxial, to a position transducer 28, for example a rotary encoder.
Pendant le fonctionnement, l'avancement du profilé provoque une rotation correspondante de la roue 20, dans la direction indiquée par la flèche F sur les figures 1 et 2. Le transducteur 28 délivre ainsi les signaux électriques indiquant la longueur d'avancement du profilé T. During operation, the advancement of the profile causes a corresponding rotation of the wheel 20, in the direction indicated by the arrow F in FIGS. 1 and 2. The transducer 28 thus delivers the electrical signals indicating the length of advance of the profile T .
Comme le montre schématiquement la figure 1, le transducteur 28 est relié à l'entrée d'une unité électronique de contrôle-commande 32 réalisée par exemple avec des microprocesseurs. As shown diagrammatically in FIG. 1, the transducer 28 is connected to the input of an electronic control-command unit 32 produced for example with microprocessors.
Cette unité électronique de contrôle-commande contrôle le fonctionnement d'un moteur de commande 33, qui peut être, par exemple, un moteur à courant continu. This electronic control-command unit controls the operation of a control motor 33, which can be, for example, a direct current motor.
L'arbre 33a du moteur porte un filetage et s'engage dans un écrou à circulation de billes 34, relié à l'une des extrémités de la tige 35, laquelle est reliée par son autre extrémité à l'obturateur 10.The shaft 33a of the motor carries a thread and engages in a nut with circulation of balls 34, connected to one of the ends of the rod 35, which is connected by its other end to the shutter 10.
Le moteur électrique 33 est couplé avec une dynamo tachymétrique 36 et un capteur de position 37, par exemple un codeur optique rotatif. La dynamo tachymétrique 36 fournit à l'unité de contrôle-commande 32 des signaux indiquant la vitesse de rotation de l'arbre du moteur électrique 33. Le capteur de position 37 quant à lui, fournit à cette unité des #ignaux indiquant la position angulaire de l'arbre du moteur 33 et, par conséquent, la position de l'obturateur 10 par rapport à l'orifice d'extrusion 6. The electric motor 33 is coupled with a tachometer dynamo 36 and a position sensor 37, for example a rotary optical encoder. The tachometer dynamo 36 supplies the control unit 32 with signals indicating the speed of rotation of the shaft of the electric motor 33. The position sensor 37 in turn provides this unit with #ignals indicating the angular position of the motor shaft 33 and, consequently, the position of the shutter 10 relative to the extrusion orifice 6.
La référence 38 désigne une unité d'entréesortie reliée à l'unité de contrôle-commande 32 par l'intermédiaire d'interfaces 39 d'un type connu. The reference 38 designates an output input unit connected to the control-command unit 32 by means of interfaces 39 of a known type.
A l'aide de l'unité d'entrée-sortie 38, un opérateur peut programmer les valeurs des longueurs
Li des différentes parties du profilé T, caractérisées chacune par la forme de leur section transversale. En outre, grâce à cette unité d'entrée-sortie, l'opérateur peut programmer des paramètres susceptibles de définir les différentes positions que l'obturateur 10 (ou les obturateurs en général, si les filières permettent plusieurs types de modifications des sections), doit prendre au cours de l'extrusion pour donner aux différentes parties du profilé la section souhaitée
Pendant le fonctionnement, l'unité de contrôlecommande 32 actionne le moteur électrique 33 selon des modalités fixées à l'avance, par des techniques de programmation de type conventionnel, d'après les signaux provenant du transducteur 28 et en fonction des ordres donnés par l'opérateur et transmis par l'unité d'entréesortie 38. Using the input-output unit 38, an operator can program the length values
Li of the different parts of the profile T, each characterized by the shape of their cross section. In addition, thanks to this input-output unit, the operator can program parameters capable of defining the different positions than the shutter 10 (or the shutters in general, if the dies allow several types of modification of the sections), must take during the extrusion to give the different parts of the profile the desired section
During operation, the control unit 32 actuates the electric motor 33 according to modalities fixed in advance, by programming techniques of conventional type, according to the signals coming from the transducer 28 and according to the orders given by the operator and transmitted by the output input unit 38.
Quelquefois, le profilé T est soumis en aval de la tête d'extrusion à une action de gaufrage superficiel, au moyen d'une gaufreuse formée d'une roue à gaufrer, qui agit sur une partie au moins de la surface du profilé. Cette gaufreuse peut alors avoir la forme du dispositif de la figure 2 et, dans ce cas, la roue 20 fait fonction de roue à gaufrer. Le dispositif représenté sur la figure 2 permet donc d'exercer, soit l'action de gaufrage superficiel souhaitée, soit l'action de contrôle du mode de progression du profilé, afin de synchroniser les variations de section du profilé avec sa progression. Sometimes the profile T is subjected downstream of the extrusion head to a surface embossing action, by means of an embosser formed by an embossing wheel, which acts on at least part of the surface of the profile. This embosser can then have the shape of the device of FIG. 2 and, in this case, the wheel 20 acts as an embossing wheel. The device shown in FIG. 2 therefore makes it possible to exercise either the desired surface embossing action or the action of controlling the mode of progression of the profile, in order to synchronize the variations in section of the profile with its progression.
Naturellement, d'autres types de transducteurs peuvent être utilisés à la place du codeur optique rotatif 28, que nous ne proposons qu'à titre d'exemple. Naturally, other types of transducers can be used in place of the rotary optical encoder 28, which we only offer by way of example.
Naturellement, le principe de l'invention étant, la forme sous laquelle elle est traduite dans la réalité et les détails de l'exécution admettent de nombreuses variantes, comparées à ce qui a été décrit et illustré simplement à titre d'exemple non limitatif sans pour autant sortir du cadre de la présente invention Naturally, the principle of the invention being, the form in which it is translated into reality and the details of execution admit of numerous variations, compared to what has been described and illustrated simply by way of nonlimiting example without however depart from the scope of the present invention
Claims (5)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT8367183A IT1165544B (en) | 1983-02-17 | 1983-02-17 | EQUIPMENT FOR SYNCHRONIZING THE SECTION VARIATIONS OF A DRAWING PARTICULARLY OF A SEAL FOR MOTOR VEHICLE BODIES WITH THE ADVANCE OF THE DRAWN IN AN EXTRUSION MACHINE AND EXTRUSION MACHINE AND EXTRUSION MACHINE INCLUDING THE EXTRUSION MACHINE INCLUDING THE EXTRUSION MACHINE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2541176A1 true FR2541176A1 (en) | 1984-08-24 |
Family
ID=11300283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8318933A Pending FR2541176A1 (en) | 1983-02-17 | 1983-11-28 | Apparatus for synchronising the cross-sectional variations of a profile, in particular of a seal for motor-vehicle bodies, with the advancing of the profile in an extruder, and extruder equipped with this apparatus |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR2541176A1 (en) |
| IT (1) | IT1165544B (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2579287A1 (en) * | 1985-03-22 | 1986-09-26 | Ouest Cie | TUBULAR PROFILE SEAL |
| FR2579927A1 (en) * | 1985-04-03 | 1986-10-10 | Saiag Spa | |
| JPS6391222A (en) * | 1986-10-06 | 1988-04-21 | Hashimoto Forming Co Ltd | Manufacture of molding |
| EP0294345A1 (en) * | 1987-06-05 | 1988-12-07 | S.A.I.A.G. S.p.A. | Method for enabling the cutting to size of a continuously extruded weather strip with variable characteristics, particularly for motor vehicle bodies |
| FR2618095A1 (en) * | 1987-07-14 | 1989-01-20 | Ages Spa | METHOD FOR CONTINUOUS PRODUCTION OF AN EXTRUDED PROFILE HAVING SECTION SIZES WHICH VARY ON PROFILE LENGTH |
| EP0325828A1 (en) * | 1988-01-29 | 1989-08-02 | Hashimoto Forming Industry Co Ltd | Method of producing molding members |
| DE4220839C1 (en) * | 1992-06-25 | 1993-09-09 | Roehm Gmbh, 64293 Darmstadt, De | |
| EP0719637A2 (en) * | 1994-12-27 | 1996-07-03 | Toyoda Gosei Co., Ltd. | Method of decorating rubber extruded product |
| EP1349248A1 (en) * | 2002-03-28 | 2003-10-01 | Planet-Wattohm | Process and apparatus for manufacturing a profile by extrusion |
| EP2363268A1 (en) * | 2010-03-01 | 2011-09-07 | SaarGummi technologies S.à.r.l. | Method and device for producing a weatherstrip by means of extrusion |
| US9174519B2 (en) | 2011-10-18 | 2015-11-03 | Henniges Automotive Sealing Systems North America Inc. | Weatherstrip assembly having a variable length shim |
| EP3766659A1 (en) * | 2019-07-19 | 2021-01-20 | GTG Gummitechnik Wolfgang Bartelt GmbH & Co. KG | Method and device for producing seal strips |
| EP3766658A1 (en) * | 2019-07-19 | 2021-01-20 | GTG Gummitechnik Wolfgang Bartelt GmbH & Co. KG | Method and device for producing seal strips |
| EP3705258A4 (en) * | 2017-11-01 | 2021-07-07 | The Japan Steel Works, Ltd. | Extruding machine and die of extruding machine |
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|---|---|---|---|---|
| US3422648A (en) * | 1961-10-02 | 1969-01-21 | Jerome H Lemelson | Extrusion apparatus |
| US3635614A (en) * | 1968-01-04 | 1972-01-18 | Specialties Const | Apparatus for producing embossed plastic articles |
| FR2178210A1 (en) * | 1972-03-29 | 1973-11-09 | Grace W R Ltd | Extruded pipes pro of plastic mixt, oil and filler - for use as battery anode casings |
| US4067146A (en) * | 1975-07-08 | 1978-01-10 | Francois Mesnel | Sealing joints for automobile body and an extrusion head for extruding such joints |
| GB2032500A (en) * | 1978-10-14 | 1980-05-08 | Draftex Dev Ag | Improvements in and Relating to Channel-shaped Strip Structures |
| EP0062788A2 (en) * | 1981-04-09 | 1982-10-20 | Krupp Kautex Maschinenbau GmbH | Method and apparatus for producing preferably hollow parisons of a thermoplast |
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- 1983-02-17 IT IT8367183A patent/IT1165544B/en active
- 1983-11-28 FR FR8318933A patent/FR2541176A1/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3422648A (en) * | 1961-10-02 | 1969-01-21 | Jerome H Lemelson | Extrusion apparatus |
| US3635614A (en) * | 1968-01-04 | 1972-01-18 | Specialties Const | Apparatus for producing embossed plastic articles |
| FR2178210A1 (en) * | 1972-03-29 | 1973-11-09 | Grace W R Ltd | Extruded pipes pro of plastic mixt, oil and filler - for use as battery anode casings |
| US4067146A (en) * | 1975-07-08 | 1978-01-10 | Francois Mesnel | Sealing joints for automobile body and an extrusion head for extruding such joints |
| GB2032500A (en) * | 1978-10-14 | 1980-05-08 | Draftex Dev Ag | Improvements in and Relating to Channel-shaped Strip Structures |
| EP0062788A2 (en) * | 1981-04-09 | 1982-10-20 | Krupp Kautex Maschinenbau GmbH | Method and apparatus for producing preferably hollow parisons of a thermoplast |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0200582A1 (en) * | 1985-03-22 | 1986-11-05 | Compagnie Des Produits Industriels De L'ouest (C.P.I.O.) | Sealing strip having a tubular shape |
| FR2579287A1 (en) * | 1985-03-22 | 1986-09-26 | Ouest Cie | TUBULAR PROFILE SEAL |
| FR2579927A1 (en) * | 1985-04-03 | 1986-10-10 | Saiag Spa | |
| DE3609099A1 (en) * | 1985-04-03 | 1986-11-06 | S.A.I.A.G. S.p.A., Ciriè, Turin/Torino | SEALING STRIP FOR MOTOR VEHICLES AND METHOD AND DEVICE FOR THEIR PRODUCTION |
| JPH0586736B2 (en) * | 1986-10-06 | 1993-12-14 | Hashimoto Forming Kogyo Co | |
| JPS6391222A (en) * | 1986-10-06 | 1988-04-21 | Hashimoto Forming Co Ltd | Manufacture of molding |
| EP0294345A1 (en) * | 1987-06-05 | 1988-12-07 | S.A.I.A.G. S.p.A. | Method for enabling the cutting to size of a continuously extruded weather strip with variable characteristics, particularly for motor vehicle bodies |
| FR2618095A1 (en) * | 1987-07-14 | 1989-01-20 | Ages Spa | METHOD FOR CONTINUOUS PRODUCTION OF AN EXTRUDED PROFILE HAVING SECTION SIZES WHICH VARY ON PROFILE LENGTH |
| EP0325828A1 (en) * | 1988-01-29 | 1989-08-02 | Hashimoto Forming Industry Co Ltd | Method of producing molding members |
| US4865796A (en) * | 1988-01-29 | 1989-09-12 | Hashimoto Forming Industry Co., Ltd. | Method of producing molding members |
| DE4220839C1 (en) * | 1992-06-25 | 1993-09-09 | Roehm Gmbh, 64293 Darmstadt, De | |
| US5753063A (en) * | 1994-12-27 | 1998-05-19 | Toyoda Gosei Co., Ltd. | Method of decorating rubber extruded product |
| EP0719637A3 (en) * | 1994-12-27 | 1996-11-27 | Toyoda Gosei Kk | Method of decorating rubber extruded product |
| EP0719637A2 (en) * | 1994-12-27 | 1996-07-03 | Toyoda Gosei Co., Ltd. | Method of decorating rubber extruded product |
| EP1349248A1 (en) * | 2002-03-28 | 2003-10-01 | Planet-Wattohm | Process and apparatus for manufacturing a profile by extrusion |
| EP2363268A1 (en) * | 2010-03-01 | 2011-09-07 | SaarGummi technologies S.à.r.l. | Method and device for producing a weatherstrip by means of extrusion |
| US9174519B2 (en) | 2011-10-18 | 2015-11-03 | Henniges Automotive Sealing Systems North America Inc. | Weatherstrip assembly having a variable length shim |
| EP3705258A4 (en) * | 2017-11-01 | 2021-07-07 | The Japan Steel Works, Ltd. | Extruding machine and die of extruding machine |
| US11697238B2 (en) | 2017-11-01 | 2023-07-11 | The Japan Steel Works, Ltd. | Extruder and die for the same |
| EP3766659A1 (en) * | 2019-07-19 | 2021-01-20 | GTG Gummitechnik Wolfgang Bartelt GmbH & Co. KG | Method and device for producing seal strips |
| EP3766658A1 (en) * | 2019-07-19 | 2021-01-20 | GTG Gummitechnik Wolfgang Bartelt GmbH & Co. KG | Method and device for producing seal strips |
Also Published As
| Publication number | Publication date |
|---|---|
| IT8367183A0 (en) | 1983-02-17 |
| IT1165544B (en) | 1987-04-22 |
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