WO1999036283A1 - Sealing joint strip, method for making the joint strip and machine for making the joint strip - Google Patents

Sealing joint strip, method for making the joint strip and machine for making the joint strip Download PDF

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Publication number
WO1999036283A1
WO1999036283A1 PCT/FR1998/000061 FR9800061W WO9936283A1 WO 1999036283 A1 WO1999036283 A1 WO 1999036283A1 FR 9800061 W FR9800061 W FR 9800061W WO 9936283 A1 WO9936283 A1 WO 9936283A1
Authority
WO
WIPO (PCT)
Prior art keywords
strip
sealing
support
sealing strip
mold
Prior art date
Application number
PCT/FR1998/000061
Other languages
French (fr)
Inventor
Gérard Mesnel
Original Assignee
Mesnel Gerard
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mesnel Gerard filed Critical Mesnel Gerard
Priority to PCT/FR1998/000061 priority Critical patent/WO1999036283A1/en
Priority to AU58713/98A priority patent/AU5871398A/en
Publication of WO1999036283A1 publication Critical patent/WO1999036283A1/en

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Classifications

    • 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
    • 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
    • B60J10/15—Sealing arrangements characterised by the material
    • B60J10/16—Sealing arrangements characterised by the material consisting of two or more plastic materials having different physical or chemical properties
    • 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
    • B60J10/21—Sealing arrangements characterised by the shape having corner parts or bends

Definitions

  • Each vehicle includes a body to which movable panels such as doors, hoods, etc. are attached.
  • the body and the movable panels, the doors in particular, consist of stamped sheets welded together, by points, forming rebates.
  • Seals are provided to ensure watertightness, both climatic and sound, at the level of the movable panels (hoods, vehicle access doors, sunroof), fixed panels of the body (windshield, fixed window, rebate of 'opening window frame), and sliding windows.
  • the joints can be glued with a double-sided adhesive, mounted on clips or held by force on the sheet metal rebates, bonding and clipping concerning more particularly the doors while the force retention is rather reserved for the body .
  • the force-retaining joints generally comprise an internal reinforcement, of steel for example, having sufficient rigidity for the force-retaining, while retaining a certain flexibility necessary to match the curves of the panels.
  • the frame is covered with a mixture of elastomer or compact plastic and adjacent to a cellular mixture, in other words with "closed cells", or spongy, with "open cells” but covered with a film, on which is carried out sealing.
  • the reinforcement and the adjacent mixture are generally produced using an extrusion die, and therefore have uniform cross sections.
  • the coating of the reinforcement and the joining thereof with the adjacent mixture, cellular or spongy, can be carried out by a single extrusion or by two separate extrusions, respectively of the reinforcement and of the adjacent mixture, followed by bonding of the 'together.
  • the present invention firstly proposes a new seal which can be adjusted to the panels.
  • the invention relates to a sealing strip comprising a support strip for fixing the sealing strip and a shaped sealing strip secured to the support strip, characterized in that the sealing strip sealing has at least two different cross-sections in its length.
  • the invention is a variable section joint. Thanks to this, the joint strip effectively seals by making it possible to make up for play and by adapting to small radii of curvature.
  • the length of the sealing strip is advantageously cut into a plurality of elementary lengths.
  • the sealing strip may be of cellular or alveolar foam, in other words with “closed cells”, or spongy, with “open cells”.
  • a sealing strip comprising a support strip for fixing the sealing strip and a shaped sealing strip secured to the support strip, characterized in that that the sealing strip comprises an external strip of conformable material.
  • the conformable external strip is made of elastic material.
  • the conformable external strip is made of latex foam.
  • the external strip is secured to an intermediate damping strip.
  • the joint fixing support strip may comprise a metal retaining band forcibly covered with a compact and hard material.
  • the fixing of the joint is carried out by force-holding.
  • the invention also relates to a method of manufacturing a sealing strip, in which a support strip for fixing the sealing strip is produced, a sealing strip is conformed and it is secured to the strip.
  • support characterized in that to conform the sealing strip, a base liquid is continuously poured from a reservoir into a mold having at least two positions of its length with different cross sections and the mold is driven in a scrolling relative to the reservoir.
  • the method of the invention makes it possible to obtain a seal strip of variable section without the need to add or remove material constituting the seal after its manufacture.
  • the latter is driven into a cusp while driving the strip in the direction of relative movement of the mold. Thanks to this, the sealing strip and even the entire sealing strip can be manufactured continuously.
  • a support strip for fixing the sealing strip is intended to be secured to the sealing strip. It is also planned to position the fixing support strip laterally and in depth with respect to the sealing strip contained in the mold, and to join the two strips together by baking in an oven.
  • the invention relates to a machine for manufacturing a sealing strip comprising means for producing a support strip for fixing the seal and means for molding a sealing strip and securing it to the support strip, characterized by the fact that the means for molding the sealing strip comprise an endless strip arranged to be driven around two rollers with a molding strand and a return strand, the endless strip consisting of a plurality of molds contiguous elementaries.
  • a mold made up of a plurality of elementary molds carried by an endless band makes it possible to continuously produce a sealing band which it is possible to vary the cross sections of certain portions at will.
  • the machine comprises means for securing the sealing strip to the support strip, and means for positioning the support strip relative to the endless strip of the elementary molds.
  • the machine enables the sealing strip associated with the fixing support strip to be produced in an automated system.
  • the positioning means comprise an endless strip arranged to scroll through the above the endless strip of elementary molds with a positioning strand running in synchronism with the molding strand of the sealing strip.
  • the machine associates it with the support strip.
  • FIG. 1 shows a schematic view of the manufacturing machine
  • FIG. 2 shows an elementary mold of the endless strip for molding the machine of Figure 1;
  • FIG. 3 shows a side view of the endless strip of molding and the endless strip of positioning of the machine of Figure 1;
  • - Figure 4 shows a cross-sectional view of the joint strip and
  • FIG. 5 shows a portion of the endless strip for positioning inside the oven of the machine of Figure 1.
  • the seal strip 100 ( Figure 4) has a support strip 101 for fixing the strip joint, a shaped sealing strip 103, secured to the support strip 101 and an intermediate strip 102.
  • the support strip 101 intended to ensure the fixing, here by force retention, of the seal strip 100 to a panel of a motor vehicle, for example, comprises a metal pinching strip 111, here made of steel, the two edges of which longitudinal are folded towards each other to form like a clamp.
  • the metal strip 111 is covered with a compact material here "thermoset”, that is to say requiring subsequent cooking. We could also consider a compact plastic coating "thermoplastic”, without subsequent firing.
  • the support strip 101 has sufficient rigidity to ensure the fixing of the joint strip by holding it by force on sheet metal rebates of the panel, while retaining a certain flexibility to match the contours of the panel.
  • the shaped sealing strip 103 is an external strip 103, of conformable material extending over an intermediate damping strip 102 secured to the external strip 103 and to the support strip 101.
  • the conformable material of the external strip 103 is a spongy latex foam (with "open cells”) and elastic, but could also be a cellular foam (with "closed cells”).
  • the outer strip 103 is shaped by molding.
  • the intermediate strip 102 is made of thermoset cellular material is present here a lacunar tubular structure; it could also have a section in the form of a solid tongue. It will be noted that the strip 102 could be in a compact thermoset.
  • the support strip 101 has two U-shaped legs folded back towards one another.
  • the intermediate strip 102 is here in the form of a half-ring, the ends of the half-ring being fixed on the external side of the support strip 101, between the two U-shaped branches.
  • the external strip 103 has a roughly oval geometry and covers the side external of the intermediate strip 102 by extending slightly on the support strip 101. Thanks to the structure of the joint strip 100 which has just been described, the sealing strip 103 can conform, or be shaped, when 'it is put in condition to ensure its sealing function, for example by closing a door. As soon as the joint strip 100 is removed from its functional state, the elastic external strip 103 of latex returns to its original shape. The function of the intermediate strip 102 will appear below.
  • Such a joint strip 100 could have a uniform section, along its length, in practice it will generally be given a variable section, as described below.
  • the external strip 103 has in different positions of its length different cross sections, the length of the external strip 103 being cut into a plurality of elementary lengths.
  • the seal strip 100 is fixed by pinching the support strip 101 on the rebates. sheets constituting the frame.
  • the intermediate strip 102 can absorb play between the body and the door.
  • the external sealing strip 103 while conforming and being shaped, can be housed in the recesses of the structure, in order to ensure total sealing.
  • the external sealing strip 103 of elastic latex foam loses its modeling and regains its resting shape.
  • the shaped sealing strip is a strip of molded latex foam of variable cross section, as described above, but without an intermediate strip.
  • joint strip 100 intended to be fixed by pinching or holding by force, but one could also envisage fixing by gluing or by a plurality of clips.
  • the support strip could have a bonding surface.
  • thermoset material constituting here the coating of the support strip 101 and the intermediate strip 102
  • thermoset material instead of the thermoset material constituting here the coating of the support strip 101 and the intermediate strip 102, one could envisage a "thermoplastic" elastomeric material, without subsequent baking.
  • Machine 1 comprises, from upstream to downstream:
  • the manufacturing device 10 comprises, from upstream to downstream, a roller 12 for supplying the metal strip 110, a preforming device 13, an extrusion die 11 , a baking oven 16 and a brushing device 17.
  • the extrusion die 11 comprises a double head fed by two channels 14, 15 respectively intended to extrude a compact material here "thermoset", and a cellular material, also thermoset.
  • the device 13 preforms the metal strip 110 continuously delivered by the roller 12 by folding the two longitudinal edges of the strip 110 towards each other in order to obtain a strip of pinch 111.
  • the other way 15 extrudes the strip intermediate 102 with the thermoset cellular material, then the die head coextrudes the intermediate strip 102 and the support strip 101, by joining them together.
  • the support strip 101 and the intermediate strip 102 are then driven continuously in the oven 16 to bake the "thermoset" substance of the support strip 101.
  • the strips 101, 102 are brushed by the brushing device 17 before being continuously driven towards the molding device 40.
  • thermoplastic material is extruded, without subsequent baking, and the manufacturing device 10 does not include a baking oven.
  • the device 40 for molding the external sealing strip 103, and for joining to the intermediate strip 102 and to the support strip 101 comprises an anti-adhesive device 18, an endless strip for molding 80, a reservoir 43 containing here a latex foam, spongy substance with "open cells", an endless positioning band 90, a steam oven 45 and a cleaning device 44.
  • the endless molding strip 80 comprises an upper molding strand 81, a lower return strand 82.
  • Support elements 41 for fixing an elementary mold 5, which will be described below, are mounted over the entire extent endless strip of molding 80, external side.
  • a plurality of elementary molds 51 are to be removably attached to the plurality of support elements 41, by a sealed and series mounting of the molds 51.
  • the elementary molds 51 carried by the strip 80 form a mold 50 intended to conform the external sealing strip 103.
  • the molding strip 80 is driven around two upstream and downstream drive and detour rollers 85
  • the anti-sticking device 18 is close to the upstream roller 85, and can coat the elementary molds 51 with a coating intended to suppress the adhesion of the latex foam in the molds 51.
  • the reservoir 43 is arranged above the upper molding strand 81, near the upstream roller 85.
  • the cleaning device 44 is placed below the lower return strand 82, near the downstream roller 85.
  • the base of the mold is here in the form of an isosceles trapezoid.
  • the upper 54 and lower 55 faces, as well as the front and rear lateral faces 56, 57 are respectively mutually parallel.
  • the other two lateral faces 58, 59 are symmetrically oblique to each other with respect to a common median plane of the front and rear faces 56, 57.
  • An imprint 53 is hollowed out in the upper face 54 of the mold 51, lengthwise.
  • a foot 60 for fixing to the support element 41 is integral with the lower face 55.
  • the face here before 56 carries four pins 61 for mounting the mold 51 in series, the rear face 57 providing four holes for receiving pins of the adjacent elementary mold 71.
  • the elementary mold 51 is removably mounted to the support element 41 by the fixing foot 60, and connected at the front and at the rear to two other contiguous elementary molds using pawns 61 and orifices.
  • pairs of presses 42 are provided to exert pressure on the oblique lateral faces 58, 59 of the elementary molds 51, with therefore a wedge effect.
  • molds have a uniform cross-section, the others, a variable cross-section so that the mold 50 has a variable cross section, for manufacturing the joint strip of variable cross section.
  • the elementary molds could be of identical respective cross sections, for the manufacture of a joint strip of uniform cross section.
  • the endless positioning strip 90 has a structure similar to that of the molding strip 80, with in particular an upper return strand 91, a lower positioning strand 92.
  • the length of the strands 91, 92 of the positioning strip 90 is slightly lower than that of the strands 81, 82 of the molding strip 80.
  • the positioning strip 90 carries, on the external side, a plurality of positioning elements 46 (FIG. 5) intended to receive the support strip 101 secured to the intermediate strip 102.
  • the positioning strip 90 is driven around two rollers 95.
  • Each positioning element 46 consists of two parts 47, 48.
  • a first part 47 comprises a shoe 49 having a face intended to be secured to the positioning strip 90, and carrying on the other face a hooking leg 50 which extends over the length of the support member.
  • the leg 50 has a pointed and ribbed free end.
  • the shoe is also provided with a pair of lateral guide fins 72 extending over the length of the element 46 and intended to be threaded in slides of the steam oven 45.
  • the second part 48 has throttling shoes around the free end of the positioning leg 50 connected to the shoe 49 by ribs 77 for holding but also for passing the steam flow.
  • the shoes are extended by a guide fin 73.
  • the positioning strip 90 is placed above the molding strip 80, the lower positioning strand 92 being situated just above the rear part of the upper molding strand 81.
  • the rear central part of the strands 91, 92 of the positioning strip 90 as well as the parts of the molding strip 80 located below this central part are contained inside the oven 45.
  • the cleaning device 44 mold 51 is located below the lower strand 82 of return of the molding strip 80, at the outlet of the oven.
  • liquid latex foam is continuously poured from the reservoir 43 into the elementary molds running from upstream to downstream on the upper molding strand 81 by driving the rollers 85.
  • the content of the molds 51 parading on the upper molding strand 81 gels.
  • the positioning strip 90 is also driven by the rollers 95 and the positioning strand 92 runs in synchronism with the molding strand 81, from upstream to downstream.
  • the manufacturing device 10 continuously supplies the positioning strip 90 with the support and intermediate strips 101, 102 joined together, by means of a guide device 2.
  • the support and intermediate strips 101, 102 are received at the front of the lower positioning strand 92 which positions them laterally and in depth with respect to the external sealing strip 103, during gelation.
  • the support strips, intermediate and external 101, 102, 103 are driven in the steam oven 45 for joining, by fusion, of the support strip 101 and of the intermediate strip 102 to the external strip 103 in order to obtain the sealing strip 100.
  • the finishing device 30 extracts the joint strip 100 from the mold 50 by continuously driving it in the direction of relative movement of the mold 50, that is to say from upstream to the 'downstream.
  • the elementary molds 51 and the positioning elements 46 are driven, in a cusp respectively with the strands 82, 91 returning the molding strip 80 and the positioning strip 90.
  • the mold 50 as a whole, thus escapes the joint strip 100.
  • the cleaning device 44 cleans the elementary molds 51 of the lower return strand 82, their upper face 54 being turned downwards.
  • the finishing device 30 comprises, from upstream to downstream, a dryer 31, a varnish coating device 32, a varnish crosslinking oven 33, a forming device 34 and a cutting device 35.
  • the dryer 31 dries the seal strip 100, leaving the steam oven 45, then the coating device 32 sheaths the latex foam of the sealing strip 103 with a dried varnish in the crosslinking oven 33 in order to avoid crumbling of the foam.
  • the forming device 34 shapes the latex foam before the device 35 cuts a joint strip 100 of useful length.
  • the interlocked strips are introduced into an oven 16 in order to cook the "thermoset" substance. After removing the strips from the oven 16, they are brushed. In a following stage of the manufacturing process, the external sealing strip 103 is molded and it is secured to the intermediate strips and support 101, 102.
  • a base liquid in this case liquefied latex foam
  • the intermediate strip 102 is positioned, secured to the support strip 101, laterally and in depth with respect to the external sealing strip 103, before introducing the three strips in a steam oven 45.
  • the foam sealing strip and the intermediate strip are joined together by vulcanization. in the oven 45.
  • the mold 50 is driven in a cusp with respect to the joint strip 100 which is continued to scroll from upstream to downstream.
  • joint strip 100 For finishing the joint strip 100, another step in the process, it is dried at the outlet of the steam oven 45, then the external strip 103 is sheathed in latex with a varnish which is dried in the crosslinking oven 33 Finally, the latex foam is shaped in the device 34 and a useful length of joint tape 100 is cut.
  • a joint strip 100 is produced, comprising in particular an intermediate band 102.
  • thermoset by using a thermoplastic, elastomeric material instead.

Abstract

The invention concerns a machine (1) comprising an endless belt (80) consisting of a plurality of adjacent elementary moulds (51). In operating conditions, the moulds (51) are driven about two rollers (85) with a moulding end (81) and a return end (82). On the moulding end (81), a sealing strip (103) is moulded, then made integral with a fixing filler strip (101) so as to produce the joint strip (100). The invention is particularly applicable to motor car sealing joints.

Description

BANDE DE JOINT DΕTANCHEITE, PROCEDE DE SEALING STRIP, METHOD FOR
FABRICATION DE LA BANDE DE JOINT ET MACHINEMANUFACTURE OF JOINT STRIP AND MACHINE
POUR LA FABRICATION DE LA BANDE DE JOINTFOR THE MANUFACTURE OF THE JOINT STRIP
Afin notamment de protéger les habitacles des véhicules automobiles et leurs contenus, les constructeurs automobiles équipent leurs véhicules de joints d'étanchéité. Chaque véhicule comprend une caisse sur laquelle sont fixés des panneaux mobiles tels que des portes, des capots, etc. La caisse et les panneaux mobiles, les portes notamment, sont constitués de tôles embouties et soudées entre elles, par points, en formant des feuillures.In particular in order to protect the passenger compartments of motor vehicles and their contents, automobile manufacturers equip their vehicles with seals. Each vehicle includes a body to which movable panels such as doors, hoods, etc. are attached. The body and the movable panels, the doors in particular, consist of stamped sheets welded together, by points, forming rebates.
Des joints sont prévus pour assurer l'étanchéité, aussi bien climatique que phonique au niveau des panneaux mobiles (capots, portes d'accès au véhicule, toit ouvrant), des panneaux fixes de la caisse (pare-brise, lunette fixe, feuillure d'encadrement de lunette ouvrante), et des vitres coulissantes. Pour leur fixation, les joints peuvent être collés avec un adhésif double face, montés sur clips ou maintenus à force sur les feuillures de tôles, le collage et le clipsage concernant plus particulièrment les portes tandis que le maintien à force est plutôt réservé à la caisse. Les joints de maintien à force comprennent généralement une armature interne, en acier par exemple, présentant une rigidité suffisante pour le maintien à force, tout en conservant une certaine souplesse nécessaire pour épouser les galbes des panneaux. L'armature est recouverte d'un mélange en élastomère ou en plastique compact et adjacent à un mélange cellulaire, autrement dit à "cellules fermées", ou spongieux, à "cellules ouvertes" mais recouvertes d'un film, sur lequel s'effectue l'étanchéité.Seals are provided to ensure watertightness, both climatic and sound, at the level of the movable panels (hoods, vehicle access doors, sunroof), fixed panels of the body (windshield, fixed window, rebate of 'opening window frame), and sliding windows. For their fixing, the joints can be glued with a double-sided adhesive, mounted on clips or held by force on the sheet metal rebates, bonding and clipping concerning more particularly the doors while the force retention is rather reserved for the body . The force-retaining joints generally comprise an internal reinforcement, of steel for example, having sufficient rigidity for the force-retaining, while retaining a certain flexibility necessary to match the curves of the panels. The frame is covered with a mixture of elastomer or compact plastic and adjacent to a cellular mixture, in other words with "closed cells", or spongy, with "open cells" but covered with a film, on which is carried out sealing.
L'armature et le mélange adjacent sont généralement fabriqués à l'aide d'une filière d'extrusion, et présentent de ce fait des sections transversales uniformes. Le revêtement de l'armature et la solidarisation de celle-ci avec le mélange adjacent, cellulaire ou spongieux, peuvent être effectués par une unique extrusion ou par deux extrusions distinctes, respectivement de l'armature et du mélange adjacent, suivies d'un collage de l'ensemble.The reinforcement and the adjacent mixture are generally produced using an extrusion die, and therefore have uniform cross sections. The coating of the reinforcement and the joining thereof with the adjacent mixture, cellular or spongy, can be carried out by a single extrusion or by two separate extrusions, respectively of the reinforcement and of the adjacent mixture, followed by bonding of the 'together.
De tels joints de l'art antérieur présentent de nombreux inconvénients. En effet, eu égard aux fréquentes sollicitations s'exerçant sur le véhicule, des jeux de tôles apparaissent et s'accumulent de sorte que les joints, en particulier ceux montés sur feuillures, perdent de leur efficacité, sans parler des difficultés soulevées par les tolérances de fabrication.Such seals of the prior art have many drawbacks. Indeed, in view of the frequent stresses exerted on the vehicle, sets of sheets appear and accumulate so that the seals, in particular those mounted on rebates, lose their effectiveness, not to mention the difficulties raised by tolerances Manufacturing.
En outre, du fait de leur section transversale uniforme, les joints se plissent au niveau des petits rayons de courbure des panneaux, une perte d'étanchéité que l'on ne peut pallier qu'à un coût élevé, par exemple en ôtant ou en rajoutant de la matière sur le joint. Enfin, de tels joints obligent à des pertes de contact aux endroits où doivent se loger des gâches, des charnières, etc. La présente invention propose tout d'abord un nouveau joint pouvant être ajusté aux panneaux.In addition, due to their uniform cross-section, the joints fold at the small radii of curvature of the panels, a loss of tightness which can only be compensated for at high cost, for example by removing or adding material to the joint. Finally, such seals make it necessary to lose contact where the strikes, hinges, etc. are to be housed. The present invention firstly proposes a new seal which can be adjusted to the panels.
A cet effet, l'invention concerne une bande de joint d'étanchéité comprenant une bande-support de fixation de la bande de joint et une bande conformée d'étanchéité solidarisée à la bande-support, caractérisée par le fait que la bande d'étanchéité présente au moins en deux positions de sa longueur des sections transversales différentes.To this end, the invention relates to a sealing strip comprising a support strip for fixing the sealing strip and a shaped sealing strip secured to the support strip, characterized in that the sealing strip sealing has at least two different cross-sections in its length.
Bref, l'invention est un joint à section variable. Grâce à cela, la bande de joint assure efficacement l'étanchéité en permettant de rattraper les jeux et en s'adaptant aux petits rayons de courbure.In short, the invention is a variable section joint. Thanks to this, the joint strip effectively seals by making it possible to make up for play and by adapting to small radii of curvature.
La longueur de la bande d'étanchéité est avantageusement découpée en une pluralité de longueurs élémentaires. La bande d'étanchéité peut être en mousse cellulaire ou alvéolaire, autrement dit à "cellules fermées", ou spongieuse, à "cellules ouvertes" .The length of the sealing strip is advantageously cut into a plurality of elementary lengths. The sealing strip may be of cellular or alveolar foam, in other words with "closed cells", or spongy, with "open cells".
Mais pour résoudre le problème présenté ci-dessus, on peut également proposer une bande de joint d'étanchéité comprenant une bande-support de fixation de la bande de joint et une bande conformée d'étanchéité solidarisée à la bande support, caractérisée par le fait que la bande d'étanchéité comporte une bande externe en matériau conformable.But to solve the problem presented above, it is also possible to propose a sealing strip comprising a support strip for fixing the sealing strip and a shaped sealing strip secured to the support strip, characterized in that that the sealing strip comprises an external strip of conformable material.
De préférence, la bande externe conformable est en matériau élastique.Preferably, the conformable external strip is made of elastic material.
Avantageusement, la bande externe conformable est en mousse de latex. Avantageusement encore, la bande externe est solidarisée à une bande intermédiaire d'amortissement.Advantageously, the conformable external strip is made of latex foam. Advantageously also, the external strip is secured to an intermediate damping strip.
Par ailleurs, la bande-support de fixation du joint peut comprendre une bande métallique de maintien à force recouverte d'un matériau compact et dur. Dans ce cas, la fixation du joint s'effectue par maintien à force.Furthermore, the joint fixing support strip may comprise a metal retaining band forcibly covered with a compact and hard material. In this case, the fixing of the joint is carried out by force-holding.
L'invention concerne également un procédé de fabrication d'une bande de joint d'étanchéité, dans lequel on réalise une bande-support de fixation de la bande de joint, on conforme une bande d'étanchéité et on la solidarise à la bande-support, caractérisé par le fait que pour conformer la bande d'étanchéité, on coule en continu un liquide de base d'un réservoir dans un moule présentant au moins en deux positions de sa longueur des sections transversales différentes et on entraîne le moule dans un défilement relatif par rapport au réservoir.The invention also relates to a method of manufacturing a sealing strip, in which a support strip for fixing the sealing strip is produced, a sealing strip is conformed and it is secured to the strip. support, characterized in that to conform the sealing strip, a base liquid is continuously poured from a reservoir into a mold having at least two positions of its length with different cross sections and the mold is driven in a scrolling relative to the reservoir.
Le procédé de l'invention permet d'obtenir une bande de joint d'étanchéité de section variable sans qu'il soit nécessaire d'ajouter ou d'ôter de la matière constitutive du joint après sa fabrication. Dans une forme de réalisation préférée de l'invention pour sortir la bande de matériau d'étanchéité du moule, on entraîne celui-ci dans un rebroussement tout en entraînant la bande dans le sens du défilement relatif du moule. Grâce à cela on peut fabriquer en continu la bande d'étanchéité et même la bande de joint dans son ensemble.The method of the invention makes it possible to obtain a seal strip of variable section without the need to add or remove material constituting the seal after its manufacture. In a preferred embodiment of the invention for removing the strip of sealing material from the mold, the latter is driven into a cusp while driving the strip in the direction of relative movement of the mold. Thanks to this, the sealing strip and even the entire sealing strip can be manufactured continuously.
De préférence encore, pour fixer la bande d'étanchéité, on réalise une bande-support de fixation de la bande de joint destinée à être solidarisée à la bande d'étanchéité. II est également prévu de positionner latéralement et en profondeur la bande-support de fixation par rapport à la bande d'étanchéité contenue dans le moule, et de solidariser les deux bandes par cuisson dans un four.More preferably, to fix the sealing strip, a support strip for fixing the sealing strip is intended to be secured to the sealing strip. It is also planned to position the fixing support strip laterally and in depth with respect to the sealing strip contained in the mold, and to join the two strips together by baking in an oven.
L'invention concerne enfin une machine de fabrication d'une bande de joint d'étanchéité comprenant des moyens pour réaliser une bande-support de fixation du joint et des moyens pour mouler une bande d'étanchéité et la solidariser à la bande-support, caractérisée par le fait que les moyens pour mouler la bande d'étanchéité comprennent une bande sans fin agencée pour être entraînée autour de deux rouleaux avec un brin de moulage et un brin de retour, la bande sans fin étant constituée d'une pluralité de moules élémentaires contigus.Finally, the invention relates to a machine for manufacturing a sealing strip comprising means for producing a support strip for fixing the seal and means for molding a sealing strip and securing it to the support strip, characterized by the fact that the means for molding the sealing strip comprise an endless strip arranged to be driven around two rollers with a molding strand and a return strand, the endless strip consisting of a plurality of molds contiguous elementaries.
Grâce à l'invention, un moule constitué d'une pluralité de moules élémentaires portés par une bande sans fin, permet de réaliser en continu une bande d'étanchéité dont on peut à volonté faire varier les sections transversales de certaines portions.Thanks to the invention, a mold made up of a plurality of elementary molds carried by an endless band, makes it possible to continuously produce a sealing band which it is possible to vary the cross sections of certain portions at will.
Avantageusement, la machine comprend des moyens pour solidariser la bande d'étanchéité à la bande-support, et des moyens de positionnement de la bande-support par rapport à la bande sans fin des moules élémentaires.Advantageously, the machine comprises means for securing the sealing strip to the support strip, and means for positioning the support strip relative to the endless strip of the elementary molds.
Ainsi, la machine permet de réaliser, en automate, la bande d'étanchéité associée à la bande-support de fixation. De préférence, les moyens de positionnement comprennent une bande sans fin agencée pour défiler au- dessus de la bande sans fin des moules élémentaires avec un brin de positionnement défilant en synchronisme avec le brin de moulage de la bande d'étanchéité.Thus, the machine enables the sealing strip associated with the fixing support strip to be produced in an automated system. Preferably, the positioning means comprise an endless strip arranged to scroll through the above the endless strip of elementary molds with a positioning strand running in synchronism with the molding strand of the sealing strip.
Grâce à cela, tout en moulant en continu la bande d'étanchéité, la machine associe celle-ci à la bande-support.Thanks to this, while continuously molding the sealing strip, the machine associates it with the support strip.
L'invention sera mieux comprise à l'aide de la description suivante d'une forme de réalisation intéressante de la bande de joint de l'invention, d'une forme de réalisation préférée de la machine pour la fabrication de la bande de joint et d'un mode de réalisation préféré du procédé de fabrication de la bande de joint, en référence aux dessins annexés sur lesquels :The invention will be better understood with the aid of the following description of an advantageous embodiment of the seal strip of the invention, of a preferred embodiment of the machine for manufacturing the seal strip and of a preferred embodiment of the method of manufacturing the joint strip, with reference to the appended drawings in which:
- la figure 1 représente une vue shématique de la machine de fabrication ; - la figure 2 représente un moule élémentaire de la bande sans fin de moulage de la machine de la figure 1 ;- Figure 1 shows a schematic view of the manufacturing machine; - Figure 2 shows an elementary mold of the endless strip for molding the machine of Figure 1;
- la figure 3 représente une vue de côté de la bande sans fin de moulage et de la bande sans fin de positionnement de la machine de la figure 1 ; - la figure 4 représente une vue en coupe transversale de la bande de joint et- Figure 3 shows a side view of the endless strip of molding and the endless strip of positioning of the machine of Figure 1; - Figure 4 shows a cross-sectional view of the joint strip and
- la figure 5 , représente une portion de la bande sans fin de positionnement à l'intérieur du four de la machine de la figure 1. La bande de joint 100 (figure 4) comporte une bande- support 101 de fixation de la bande de joint, une bande conformée d'étanchéité 103, solidarisée à la bande-support 101 et une bande intermédiaire 102.- Figure 5 shows a portion of the endless strip for positioning inside the oven of the machine of Figure 1. The seal strip 100 (Figure 4) has a support strip 101 for fixing the strip joint, a shaped sealing strip 103, secured to the support strip 101 and an intermediate strip 102.
La bande-support 101, destinée à assurer la fixation, ici par maintien à force, de la bande de joint 100 à un panneau de véhicule automobile, par exemple, comprend une bande métallique de pincement 111, ici en acier, dont les deux bords longitudinaux sont rabattus l'un vers l'autre pour former comme une pince de serrage. La bande métallique 111 est recouverte d'un matériau compact ici "thermoset", c'est-à-dire nécessitant une cuisson postérieure. On pourrait également envisager un revêtement en plastique compact "thermoplastic", sans cuisson postérieure.The support strip 101, intended to ensure the fixing, here by force retention, of the seal strip 100 to a panel of a motor vehicle, for example, comprises a metal pinching strip 111, here made of steel, the two edges of which longitudinal are folded towards each other to form like a clamp. The metal strip 111 is covered with a compact material here "thermoset", that is to say requiring subsequent cooking. We could also consider a compact plastic coating "thermoplastic", without subsequent firing.
La bande-support 101 présente une rigidité suffisante pour assurer la fixation de la bande de joint par maintien à force sur des feuillures de tôles embouties du panneau, tout en conservant une certaine souplesse pour épouser les galbes du panneau.The support strip 101 has sufficient rigidity to ensure the fixing of the joint strip by holding it by force on sheet metal rebates of the panel, while retaining a certain flexibility to match the contours of the panel.
La bande conformée d'étanchéité 103 est une bande externe 103, en matériau conformable s'étendant sur une bande intermédiaire d'amortissement 102 solidarisée à la bande externe 103 et à la bande-support 101. Le matériau conformable de la bande externe 103 est une mousse spongieuse de latex (à "cellules ouvertes") et élastique, mais pourrait également être une mousse cellulaire (à "cellules fermées"). La bande externe 103 est conformée par moulage. La bande intermédiaire 102 est en matériau cellulaire thermoset est présente ici une structure tubulaire lacunaire ; elle pourrait aussi avoir une section en forme de languette pleine. On notera que la bande 102 pourrait être en thermoset compact.The shaped sealing strip 103 is an external strip 103, of conformable material extending over an intermediate damping strip 102 secured to the external strip 103 and to the support strip 101. The conformable material of the external strip 103 is a spongy latex foam (with "open cells") and elastic, but could also be a cellular foam (with "closed cells"). The outer strip 103 is shaped by molding. The intermediate strip 102 is made of thermoset cellular material is present here a lacunar tubular structure; it could also have a section in the form of a solid tongue. It will be noted that the strip 102 could be in a compact thermoset.
En section transversale de la bande de joint 100 la bande-support 101 comporte deux branches en U rabattues l'une vers l'autre. La bande intermédiaire 102 est ici en forme de demi-anneau les extrémités du demi-anneau étant fixées du côté externe de la bande-support 101, entre les deux branches en U. La bande externe 103 présente une géométrie grossièrement ovale et recouvre le côté externe de la bande intermédiaire 102 en s'étendant légèrement sur la bande-support 101. Grâce à la structure de la bande de joint 100 qui vient d'être décrite, la bande d'étanchéité 103 peut se conformer, ou se modeler, lorsqu'elle est mise en état d'assurer sa fonction d'étanchéité, par exemple en fermant une porte. Dès lors que l'on sort la bande de joint 100 de son état fonctionnel, la bande externe 103 élastique en mousse de latex reprend sa forme initiale. La fonction de la bande intermédiaire 102 apparaîtra plus loin.In cross section of the joint strip 100, the support strip 101 has two U-shaped legs folded back towards one another. The intermediate strip 102 is here in the form of a half-ring, the ends of the half-ring being fixed on the external side of the support strip 101, between the two U-shaped branches. The external strip 103 has a roughly oval geometry and covers the side external of the intermediate strip 102 by extending slightly on the support strip 101. Thanks to the structure of the joint strip 100 which has just been described, the sealing strip 103 can conform, or be shaped, when 'it is put in condition to ensure its sealing function, for example by closing a door. As soon as the joint strip 100 is removed from its functional state, the elastic external strip 103 of latex returns to its original shape. The function of the intermediate strip 102 will appear below.
Une telle bande de joint 100 pourrait avoir une section uniforme, sur sa longeur, en pratique on lui donnera généralement une section variable, comme décrit ci- dessous.Such a joint strip 100 could have a uniform section, along its length, in practice it will generally be given a variable section, as described below.
Pour la bande de joint 100 à section variable, la bande externe 103 présente en plusieurs positions de sa longueur des sections transversales différentes, la longueur de la bande externe 103 étant découpée en une pluralité de longueurs élémentaires.For the joint strip 100 with variable section, the external strip 103 has in different positions of its length different cross sections, the length of the external strip 103 being cut into a plurality of elementary lengths.
Afin d'assurer l'étanchéité, par exemple entre une porte du véhicule automobile et l'encadrement de l'ouverture de porte de la caisse du véhicule, on fixe la bande de joint 100 en pinçant la bande-support 101 sur des feuillures de tôles constituant l'encadrement. En fermant la porte, la bande intermédiaire 102 peut amortir des jeux entre la caisse et la porte. La bande externe d'étanchéité 103, en se conformant et en se modelant, peut venir se loger dans les recoins de la structure, afin d'assurer une étanchéité totale. En ouvrant à nouveau la porte, la bande externe d'étanchéité 103 en mousse de latex élastique perd son modelage et retrouve sa forme de repos.In order to ensure sealing, for example between a door of the motor vehicle and the frame of the door opening of the vehicle body, the seal strip 100 is fixed by pinching the support strip 101 on the rebates. sheets constituting the frame. By closing the door, the intermediate strip 102 can absorb play between the body and the door. The external sealing strip 103, while conforming and being shaped, can be housed in the recesses of the structure, in order to ensure total sealing. By reopening the door, the external sealing strip 103 of elastic latex foam loses its modeling and regains its resting shape.
Dans une variante de réalisation, la bande conformée d'étanchéité est une bande en mousse de latex moulée de section transversale variable, telle que décrit ci-dessus, mais sans bande intermédiaire.In an alternative embodiment, the shaped sealing strip is a strip of molded latex foam of variable cross section, as described above, but without an intermediate strip.
On vient de décrire une bande de joint 100 destinée à être fixée par pincement ou maintien à force, mais on pourrait également envisager une fixation par collage ou par une pluralité de clips. Pour le collage, la bande-support pourrait présenter une surface de collage.We have just described a joint strip 100 intended to be fixed by pinching or holding by force, but one could also envisage fixing by gluing or by a plurality of clips. For bonding, the support strip could have a bonding surface.
Il pourrait aussi être prévu de fixer la bande d'étanchéité 103 du côté externe de l'un des bords rabattus de la bande-support 101. Concernant la bande de joint 100 avec bande intermédiaire 102, elle pourrait naturellement être dépourvue de bande externe 103 le long de quelques portions limitées de la bande 100. On a décrit une bande de joint à armature 111. Il est clair que la présente demande s'applique tout aussi bien à des bandes de joint sans armature, comme par exemple celles disposées autour des portières de véhicule.It could also be provided to fix the sealing strip 103 on the external side of one of the folded edges of the support strip 101. With regard to the joint strip 100 with intermediate band 102, it could naturally be devoid of an external band 103 along a few limited portions of the band 100. An armored joint strip 111. A description has been given of the present application. applies equally well to unreinforced joint strips, such as those arranged around the vehicle doors.
A la place du matériau thermoset constituant ici le revêtement de la bande support 101 et la bande intermédiaire 102, on pourrait envisager un matériau élastomère "thermoplastic", sans cuisson postérieure.Instead of the thermoset material constituting here the coating of the support strip 101 and the intermediate strip 102, one could envisage a "thermoplastic" elastomeric material, without subsequent baking.
Après avoir décrit la bande joint 100, nous allons maintenant présenter la forme préférée de réalisation de la machine 1 pour la fabrication de la bande de joint 100 comportant la bande-support 101, la bande intermédiaire d'amortissement 102 et la bande externe d'étanchéité 103.After having described the joint strip 100, we will now present the preferred embodiment of the machine 1 for the manufacture of the joint strip 100 comprising the support strip 101, the intermediate damping strip 102 and the external strip sealing 103.
La machine 1 comprend, de l'amont vers l'aval :Machine 1 comprises, from upstream to downstream:
- un dispositif 10 de fabrication de la bande-support 101 et de la bande intermédiaire d'amortissement 102 ;- A device 10 for manufacturing the support strip 101 and the intermediate damping strip 102;
- un dispositif 40 de moulage de la bande externe d'étanchéité 103 et de solidarisation à la bande intermédiaire 102 et à la bande-support 101 ; et- A device 40 for molding the external sealing strip 103 and for joining to the intermediate strip 102 and to the support strip 101; and
- un dispositif 30 de finition de la bande de joint 100. Le dispostif de fabrication 10 comprend, de l'amont vers l'aval, un rouleau 12 débiteur de bande métallique 110, un dispositif de préformage 13, une filière d'extrusion 11, un four de cuisson 16 et un dispositif de brossage 17. La filière d'extrusion 11 comporte une tête double alimentée par deux voies 14, 15 respectivement destinées à extruder un matériau compact ici "thermoset", et un matériau cellulaire, également thermoset.a device 30 for finishing the joint strip 100. The manufacturing device 10 comprises, from upstream to downstream, a roller 12 for supplying the metal strip 110, a preforming device 13, an extrusion die 11 , a baking oven 16 and a brushing device 17. The extrusion die 11 comprises a double head fed by two channels 14, 15 respectively intended to extrude a compact material here "thermoset", and a cellular material, also thermoset.
Pour fabriquer la bande-support 101, le dispositif 13 préforme la bande métallique 110 débitée en continu par le rouleau 12 en rabattant les deux bords longitudinaux de la bande 110 l'un vers l'autre afin d'obtenir une bande de pincement 111. La filière d'extrusion 11, traversée par la bande pincement 111, recouvre celle-ci avec le matériau compact thermoset extrudé par la voie 14, afin d'obtenir la bande-support 101. L'autre voie 15 extrudé la bande intermédiaire 102 avec le matériau cellulaire thermoset, puis la tête de filière coextrude la bande intermédiaire 102 et la bande-support 101, en les solidarisant l'une à l'autre.To manufacture the support strip 101, the device 13 preforms the metal strip 110 continuously delivered by the roller 12 by folding the two longitudinal edges of the strip 110 towards each other in order to obtain a strip of pinch 111. The extrusion die 11, crossed by the pinch strip 111, covers the latter with the compact thermoset material extruded by way 14, in order to obtain the support strip 101. The other way 15 extrudes the strip intermediate 102 with the thermoset cellular material, then the die head coextrudes the intermediate strip 102 and the support strip 101, by joining them together.
La bande-support 101 et la bande intermédiaire 102 sont ensuite entraînées en continu dans le four 16 pour cuire la substance "thermoset" de la bande-support 101.The support strip 101 and the intermediate strip 102 are then driven continuously in the oven 16 to bake the "thermoset" substance of the support strip 101.
A la sortie du four 16, les bandes 101, 102 sont brossées par le dispositif de brossage 17 avant d'être entraînées en continu vers le dispositif de moulage 40.At the outlet of the oven 16, the strips 101, 102 are brushed by the brushing device 17 before being continuously driven towards the molding device 40.
Dans une autre forme de réalisation, on extrudé un matériau "thermoplastic", sans cuisson postérieure, et le dispositif de fabrication 10 ne comprend pas de four de cuisson.In another embodiment, a "thermoplastic" material is extruded, without subsequent baking, and the manufacturing device 10 does not include a baking oven.
Le dispositif 40 de moulage de la bande externe d'étanchéité 103, et de solidarisation à la bande intermédiaire 102 et à la bande support 101, comprend un dispositif d'anticollage 18, une bande sans fin de moulage 80, un réservoir 43 contenant ici une mousse de latex, substance spongieuse à "cellules ouvertes", une bande sans fin de positionnement 90, un four à vapeur 45 et un dispositif de nettoyage 44.The device 40 for molding the external sealing strip 103, and for joining to the intermediate strip 102 and to the support strip 101, comprises an anti-adhesive device 18, an endless strip for molding 80, a reservoir 43 containing here a latex foam, spongy substance with "open cells", an endless positioning band 90, a steam oven 45 and a cleaning device 44.
La bande sans fin de moulage 80 comprend un brin supérieur de moulage 81, un brin inférieur de retour 82. Des éléments-supports 41 de fixation d'un moule élémentaire 5, qui va être décrit plus loin, sont montés sur toute l'étendue de la bande sans fin de moulage 80, côté externe. Une pluralité de moules élémentaires 51 sont à fixer de façon amovible sur la pluralité d'éléments-support 41, par un montage étanche et en série des moules 51. Les moules élémentaires 51 portés par la bande 80 forment un moule 50 destiné à conformer la bande externe d'étanchéité 103. La bande de moulage 80 est entraînée autour de deux rouleaux d'entraînement et de détour amont et aval 85The endless molding strip 80 comprises an upper molding strand 81, a lower return strand 82. Support elements 41 for fixing an elementary mold 5, which will be described below, are mounted over the entire extent endless strip of molding 80, external side. A plurality of elementary molds 51 are to be removably attached to the plurality of support elements 41, by a sealed and series mounting of the molds 51. The elementary molds 51 carried by the strip 80 form a mold 50 intended to conform the external sealing strip 103. The molding strip 80 is driven around two upstream and downstream drive and detour rollers 85
Le dispositif d'anticollage 18 est voisin du rouleau amont 85, et peut enduire les moules élémentaires 51 d'un revêtement destiné à supprimer l'adhérence de la mousse de latex dans les moules 51.The anti-sticking device 18 is close to the upstream roller 85, and can coat the elementary molds 51 with a coating intended to suppress the adhesion of the latex foam in the molds 51.
Le réservoir 43 est disposé au-dessus du brin supérieur de moulage 81, près du rouleau amont 85.The reservoir 43 is arranged above the upper molding strand 81, near the upstream roller 85.
Le dispositif de nettoyage 44 est placé au-dessous du brin inférieur de retour 82, près du rouleau aval 85.The cleaning device 44 is placed below the lower return strand 82, near the downstream roller 85.
La structure de l'un des moules élémentaires 51 va maintenant être décrite. La base du moule est ici en forme de trapèze isocèle. Les faces supérieure 54 et inférieure 55, ainsi que les faces latérales avant et arrière 56, 57 sont respectivement parallèles entre elles. Les deux autres faces latérales 58, 59 sont obliques symétriquement entre elles par rapport à un plan médian commun aux faces avant et arrière 56, 57. Une empreinte 53 est creusée dans la face supérieure 54 du moule 51, dans le sens de la longueur. Un pied 60 de fixation à l'élément-support 41 est solidaire de la face inférieure 55. La face ici avant 56 porte quatre pions 61 pour le montage en série du moule 51, la face arrière 57 ménageant quatre orifices de réception de pions du moule élémentaire adjacent 71. Dans son état fonctionnel, le moule élémentaire 51 est monté de façon amovible à l'élément-support 41 par le pied de fixation 60, et relié à l'avant et à l'arrière à deux autres moules élémentaires contigus à l'aide des pions 61 et des orifices. En outre, afin d'assurer l'étanchéité des liaisons entre les moules élémentaires contigus, des paires de presse 42 sont prévues pour exercer une pression sur les faces latérales obliques 58,59 des moules élémentaires 51, avec donc un effet de coin.The structure of one of the elementary molds 51 will now be described. The base of the mold is here in the form of an isosceles trapezoid. The upper 54 and lower 55 faces, as well as the front and rear lateral faces 56, 57 are respectively mutually parallel. The other two lateral faces 58, 59 are symmetrically oblique to each other with respect to a common median plane of the front and rear faces 56, 57. An imprint 53 is hollowed out in the upper face 54 of the mold 51, lengthwise. A foot 60 for fixing to the support element 41 is integral with the lower face 55. The face here before 56 carries four pins 61 for mounting the mold 51 in series, the rear face 57 providing four holes for receiving pins of the adjacent elementary mold 71. In its functional state, the elementary mold 51 is removably mounted to the support element 41 by the fixing foot 60, and connected at the front and at the rear to two other contiguous elementary molds using pawns 61 and orifices. In addition, in order to seal the connections between the contiguous elementary molds, pairs of presses 42 are provided to exert pressure on the oblique lateral faces 58, 59 of the elementary molds 51, with therefore a wedge effect.
Parmi la pluralité de moules élémentaires, des moules ont une section transversale uniforme, les autres, une section transerversale variable de sorte que le moule 50 présente une section transversale variable, pour la fabrication de la bande de joint de section transversale variable.Among the plurality of elementary molds, molds have a uniform cross-section, the others, a variable cross-section so that the mold 50 has a variable cross section, for manufacturing the joint strip of variable cross section.
Les moules élémentaires pourraient être de sections transversales respectives identiques, pour la fabrication d'une bande de joint de section transversale uniforme.The elementary molds could be of identical respective cross sections, for the manufacture of a joint strip of uniform cross section.
La bande sans fin de positionnement 90 présente une structure similaire à celle de la bande de moulage 80, avec notamment un brin supérieur de retour 91, un brin inférieur de positionnement 92. La longueur des brins 91, 92 de la bande de positionnement 90 est légèrement inférieure à celle des brins 81, 82 de la bande de moulage 80.The endless positioning strip 90 has a structure similar to that of the molding strip 80, with in particular an upper return strand 91, a lower positioning strand 92. The length of the strands 91, 92 of the positioning strip 90 is slightly lower than that of the strands 81, 82 of the molding strip 80.
La bande de positionnement 90 porte, côté externe, une pluralité d'éléments de positionnement 46 (figure 5) destinés à recevoir la bande-support 101 solidaire de la bande intermédiaire 102. La bande de positionnement 90 est entraînée autour de deux rouleaux 95.The positioning strip 90 carries, on the external side, a plurality of positioning elements 46 (FIG. 5) intended to receive the support strip 101 secured to the intermediate strip 102. The positioning strip 90 is driven around two rollers 95.
Chaque élément de positionnement 46 est constitué de deux parties 47, 48. Une première partie 47 comprend un patin 49 présentant une face destinée à être solidarisée à la bande de positionnement 90, et portant sur l'autre face une jambe d'accrochage 50 qui s'étend sur la longueur de l'élément- support. La jambe 50 présente une extrémité libre pointue et nervurée. Le patin est par ailleurs muni d'une paire d'ailettes latérales de guidage 72 s'étendant sur la longueur de l'élément 46 et destinées à venir s'enfiler dans des glissières du four à vapeur 45.Each positioning element 46 consists of two parts 47, 48. A first part 47 comprises a shoe 49 having a face intended to be secured to the positioning strip 90, and carrying on the other face a hooking leg 50 which extends over the length of the support member. The leg 50 has a pointed and ribbed free end. The shoe is also provided with a pair of lateral guide fins 72 extending over the length of the element 46 and intended to be threaded in slides of the steam oven 45.
La seconde partie 48 comporte des sabots d'étranglement autour de l'extrémité libre de la jambe de positionnement 50 reliés au patin 49 par des nervures 77 de maintien mais aussi de passage de flux de vapeur. Les sabots sont prolongés par une ailette 73 de guidage.The second part 48 has throttling shoes around the free end of the positioning leg 50 connected to the shoe 49 by ribs 77 for holding but also for passing the steam flow. The shoes are extended by a guide fin 73.
La bande de positionnement 90 est disposée au-dessus de la bande de moulage 80, le brin inférieur de positionnement 92 étant situé juste au-dessus de la partie arrière du brin supérieur de moulage 81. La partie centrale arrière des brins 91, 92 de la bande de positionnement 90 ainsi que les parties de la bande de moulage 80 situées en-dessous de cette partie centrale sont contenues à l'intérieur du four 45. Enfin, le dispositif 44 de nettoyage des moules 51 est situé en-dessous du brin inférieur 82 de retour de la bande de moulage 80, à la sortie du four.The positioning strip 90 is placed above the molding strip 80, the lower positioning strand 92 being situated just above the rear part of the upper molding strand 81. The rear central part of the strands 91, 92 of the positioning strip 90 as well as the parts of the molding strip 80 located below this central part are contained inside the oven 45. Finally, the cleaning device 44 mold 51 is located below the lower strand 82 of return of the molding strip 80, at the outlet of the oven.
Après sa description structurelle, le fonctionnement du dispostif 40 va être décrit. Pour mouler la bande externe d'étanchéité 103, on coule en continu de la mousse de latex liquide du réservoir 43 dans les moules élémentaires défilant de l'amont vers l'aval sur le brin supérieur de moulage 81 par entraînement des rouleaux 85. Le contenu des moules 51 défilant sur le brin supérieur de moulage 81 se gélifie. La bande de positionnement 90 est également entraînée par les rouleaux 95 et le brin de positionnement 92 défile en synchronisme avec le brin de moulage 81, de l'amont vers l'aval.After its structural description, the operation of the device 40 will be described. To mold the external sealing strip 103, liquid latex foam is continuously poured from the reservoir 43 into the elementary molds running from upstream to downstream on the upper molding strand 81 by driving the rollers 85. The content of the molds 51 parading on the upper molding strand 81 gels. The positioning strip 90 is also driven by the rollers 95 and the positioning strand 92 runs in synchronism with the molding strand 81, from upstream to downstream.
Le dispositif de fabrication 10 fournit en continu à la bande de positionnement 90 les bandes support et intermédiaire 101, 102 solidarisées, par l'intermédiaire d'un dispositif de guidage 2.The manufacturing device 10 continuously supplies the positioning strip 90 with the support and intermediate strips 101, 102 joined together, by means of a guide device 2.
Les bandes support et intermédiaire 101, 102 sont reçues à l'avant du brin inférieur de positionnement 92 qui les positionne latéralement et en profondeur par rapport à la bande externe d'étanchéité 103, en cours de gélification.The support and intermediate strips 101, 102 are received at the front of the lower positioning strand 92 which positions them laterally and in depth with respect to the external sealing strip 103, during gelation.
Puis, les bandes support, intermédiaire et externe 101, 102, 103, sont entraînées dans le four à vapeur 45 pour solidarisation, par fusion, de la bande-support 101 et de la bande intermédiaire 102 à la bande externe 103 afin d'obtenir la bande de joint 100.Then, the support strips, intermediate and external 101, 102, 103, are driven in the steam oven 45 for joining, by fusion, of the support strip 101 and of the intermediate strip 102 to the external strip 103 in order to obtain the sealing strip 100.
A la sortie du four 45, le dispositif de finition 30 extrait la bande de joint 100 du moule 50 en l'entraînant en continu dans le sens du défilement relatif du moule 50, c'est-à-dire de l'amont vers l'aval. Les moules élémentaires 51 et les éléments de positionnement 46, sont entraînés, dans un rebroussement respectivement avec les brins 82, 91 de retour de la bande de moulage 80 et de la bande de positionnement 90. Le moule 50, dans son ensemble, échappe ainsi à la bande de joint 100. Enfin, le dispositif de nettoyage 44 nettoie les moules élémentaires 51 du brin inférieur de retour 82, leur face supérieure 54 étant tournée vers le bas.On leaving the oven 45, the finishing device 30 extracts the joint strip 100 from the mold 50 by continuously driving it in the direction of relative movement of the mold 50, that is to say from upstream to the 'downstream. The elementary molds 51 and the positioning elements 46 are driven, in a cusp respectively with the strands 82, 91 returning the molding strip 80 and the positioning strip 90. The mold 50, as a whole, thus escapes the joint strip 100. Finally, the cleaning device 44 cleans the elementary molds 51 of the lower return strand 82, their upper face 54 being turned downwards.
Le dispositif de finition 30 comprend, de l'amont vers l'aval, un séchoir 31, un dispositif 32 de revêtement de vernis, un four 33 de réticulation de vernis, un dispositif de formage 34 et un dispositif de coupe 35.The finishing device 30 comprises, from upstream to downstream, a dryer 31, a varnish coating device 32, a varnish crosslinking oven 33, a forming device 34 and a cutting device 35.
Pour la finition de la bande de joint 100, le séchoir 31 sèche la bande de joint 100, sortant du four à vapeur 45, puis le dispositif de revêtement 32 gaine la mousse de latex de la bande d'étanchéité 103 avec un vernis séché dans le four de réticulation 33 afin d'éviter un effritement de la mousse. Enfin, le dispositif de formage 34 met en forme la mousse de latex avant que le dispositif 35 ne coupe une bande de joint 100 de longueur utile. En référence au procédé de fabrication de l'invention, correspondant sensiblement au fonctionnement de la machine décrite ci-dessus, on soulignera que dans la filière 11, on extrudé la bande intermédiaire 102 avec un matériau ici thermoset cellulaire et la bande-support 101 avec un matériau ici compact thermoset, puis on coextrude la bande-support 101 et la bande intermédiaire 102 pour les solidariser l'une à l'autre. On introduit les bandes solidarisées dans un four 16 afin de cuire la substance "thermoset" . Après avoir sorti les bandes du four 16, on les brosse. Dans une étape suivante du procédé de fabrication, on moule la bande externe d'étanchéité 103 et on la solidarise aux bandes intermédiaires et support 101, 102.For finishing the seal strip 100, the dryer 31 dries the seal strip 100, leaving the steam oven 45, then the coating device 32 sheaths the latex foam of the sealing strip 103 with a dried varnish in the crosslinking oven 33 in order to avoid crumbling of the foam. Finally, the forming device 34 shapes the latex foam before the device 35 cuts a joint strip 100 of useful length. With reference to the manufacturing method of the invention, corresponding substantially to the operation of the machine described above, it will be emphasized that in the die 11, the intermediate strip 102 is extruded with a material here cellular thermoset and the support strip 101 with a material here compact thermoset, then coextrude the support strip 101 and the intermediate strip 102 to secure them to each other. The interlocked strips are introduced into an oven 16 in order to cook the "thermoset" substance. After removing the strips from the oven 16, they are brushed. In a following stage of the manufacturing process, the external sealing strip 103 is molded and it is secured to the intermediate strips and support 101, 102.
Pour mouler la bande d'étanchéité 103, on coule en continu un liquide de base, en l'espèce de la mousse de latex liquéfiée, d'un réservoir 43 dans un moule présentant une section transversale variable. Tout en gélifiant la mousse de latex contenue dans le moule 50, on positionne la bande intermédiaire 102, solidarisée avec la bande-support 101, latéralement et en profondeur par rapport à la bande externe d'étanchéité 103, avant d'introduire les trois bandes dans un four à vapeur 45. On solidarise la bande d'étanchéité en mousse et la bande intermédiaire par vulcanisation. dans le four 45. A la sortie du four 45, on entraîne le moule 50 dans un rebroussement par rapport à la bande de joint 100 qu'on continue de faire défiler de l'amont vers l'aval.To mold the sealing strip 103, a base liquid, in this case liquefied latex foam, is continuously poured from a reservoir 43 into a mold having a variable cross section. While gelling the latex foam contained in the mold 50, the intermediate strip 102 is positioned, secured to the support strip 101, laterally and in depth with respect to the external sealing strip 103, before introducing the three strips in a steam oven 45. The foam sealing strip and the intermediate strip are joined together by vulcanization. in the oven 45. At the outlet of the oven 45, the mold 50 is driven in a cusp with respect to the joint strip 100 which is continued to scroll from upstream to downstream.
Pour une finition de la bande de joint 100, autre étape du procédé, on la sèche à la sortie du four à vapeur 45, puis on gaine la bande externe 103 en latex avec un vernis que l'on sèche dans le four de réticulation 33. Enfin, on met en forme la mousse de latex dans le dispositif 34 et on coupe une longueur utile de bande de joint 100.For finishing the joint strip 100, another step in the process, it is dried at the outlet of the steam oven 45, then the external strip 103 is sheathed in latex with a varnish which is dried in the crosslinking oven 33 Finally, the latex foam is shaped in the device 34 and a useful length of joint tape 100 is cut.
Dans le procédé que l'on vient de décrire, on réalise une bande de joint 100 comprenant notamment une bande intermédiaire 102.. On pourrait également réaliser une bande de joint comportant une bande-support et une bande d'étanchéité en mousse de latex de section transersale variable, en ne fabriquant pas de bande intermédiaire.In the process which has just been described, a joint strip 100 is produced, comprising in particular an intermediate band 102. One could also produce a joint band comprising a support band and a sealing band made of latex foam. variable cross-section, by not making an intermediate strip.
Enfin, on pourrait envisager de supprimer la cuisson du thermoset, en utilisant à la place un matériau thermoplastic, élastomère. Finally, one could consider eliminating the cooking of the thermoset, by using a thermoplastic, elastomeric material instead.

Claims

REVENDICATIONS
1- Bande de joint d'étanchéité (100) comprenant une bande-support (101) de fixation de la bande de joint (100) et une bande conformée d'étanchéité (103) solidarisée à la bande-support (101) caractérisée par le fait que la bande d'étanchéité (100) présente au moins en deux positions de sa longueur des sections transversales différentes.1- Seal strip (100) comprising a support strip (101) for fixing the seal strip (100) and a shaped sealing strip (103) secured to the support strip (101) characterized by the fact that the sealing strip (100) has at least two positions along its length with different cross sections.
2 Bande de joint (100) selon la revendication 1 , dont la longueur est découpée en une pluralité de longueurs élémentaires.2 joint strip (100) according to claim 1, the length of which is cut into a plurality of elementary lengths.
3 Bande de joint selon l'une des revendications 1 et3 joint strip according to one of claims 1 and
2, dans laquelle la bande d'étanchéité (103) est en mousse à "cellules fermées" .2, in which the sealing strip (103) is made of "closed cell" foam.
4 Bande de joint (100) selon l'une des revendications 1 et 2, dans laquelle la bande d'étanchéité4 sealing strip (100) according to one of claims 1 and 2, wherein the sealing strip
(103) est en mousse à "cellules ouvertes" .(103) is made of "open cell" foam.
5 Bande de joint (100) selon la revendication 4, dans laquelle la bande d'étanchéité (103) est en mousse de latex.5 gasket strip (100) according to claim 4, wherein the sealing strip (103) is made of latex foam.
6 Bande de joint (100) selon l'une des revendications 1 à 5 , dans laquelle la bande-support (101) comporte une bande métallique (111) recouverte d'un revêtement compact.6 joint strip (100) according to one of claims 1 to 5, wherein the support strip (101) comprises a metal strip (111) covered with a compact coating.
7 Bande de joint d'étanchéité comprenant une bande-support (101) de fixation de la bande de joint (100) et une bande conformée d'étanchéité (103) solidarisée à la bande-support, caractérisée par le fait que la bande d'étanchéité comporte une bande externe (103) en matériau conformable.7 sealing strip comprising a support strip (101) for fixing the sealing strip (100) and a shaped sealing strip (103) secured to the support strip, characterized in that the strip sealing comprises an external strip (103) of conformable material.
8 Bande de joint (100) selon la revendication 7, dans laquelle la bande externe (103) est en matériau élastique.8 seal strip (100) according to claim 7, wherein the outer strip (103) is of elastic material.
9 Bande de joint (100) selon l'une des revendications 7 et 8, dans laquelle la bande externe (103) est en mousse de latex.9 joint tape (100) according to one of claims 7 and 8, wherein the outer band (103) is made of latex foam.
10 Bande de joint (100) selon l'une des revendications 7 à 9, dans laquelle la bande externe (103) est solidarisée à une bande intermédiaire d'amortissement (102).10 joint strip (100) according to one of claims 7 to 9, wherein the outer strip (103) is secured to an intermediate damping strip (102).
11 Procédé de fabrication d'une bande de joint d'étanchéité (100), dans lequel on réalise une bande-support (101) de fixation de la bande de joint (100), on moule une bande d'étanchéité (103) et on la solidarise à la bande- support (101), caractérisé par le fait que pour mouler la bande d'étanchéité (103), on coule en continu un liquide de base d'un réservoir (43) dans un moule (50) présentant au moins en deux positions de sa longueur des sections transversales différentes et on entraîne le moule (50) dans un défilement relatif par rapport au réservoir (43).11 Method of manufacturing a sealing strip (100), in which a support strip (101) for fixing the sealing strip (100) is produced, a sealing strip (103) is molded and it is secured to the support strip (101), characterized in that to mold the sealing strip (103), a base liquid is continuously poured from a reservoir (43) into a mold (50) having at least in two positions of its length with different cross sections and the mold (50) is driven in a relative movement relative to the reservoir (43).
12 Procédé de fabrication selon la revendication 11, dans lequel pour sortir la bande de matériau d'étanchéité (103) du moule (50), on entraîne celui-ci dans un rebroussement tout en entraînant la bande (103) dans le sens du défilement relatif du moule (50).12 The manufacturing method according to claim 11, wherein to remove the strip of sealing material (103) from the mold (50), the latter is driven in a cusp while driving the strip (103) in the direction of travel. relative to the mold (50).
13 Procédé de fabrication selon l'une des revendications 11 et 12, dans lequel pour fixer la bande d'étanchéité (103), on réalise une bande-support (101) de fixation de la bande de joint (100) destinée à être solidarisée à la bande d'étanchéité (103).13 The manufacturing method according to one of claims 11 and 12, wherein to fix the sealing strip (103), a support strip (101) is produced. fixing the sealing strip (100) intended to be secured to the sealing strip (103).
14 Procédé de fabrication selon l'une des revendications 11 à 13, dans lequel on positionne latéralement et en profondeur la bande-support (101) de fixation par rapport à la bande d'étanchéité (103) contenue dans le moule, et on solidarise les deux bandes par cuisson dans un four (45).14 The manufacturing method according to one of claims 11 to 13, in which the support band (101) for fixing is positioned laterally and in depth relative to the sealing band (103) contained in the mold, and it is secured the two strips by baking in an oven (45).
15 Procédé de fabrication selon l'une des revendications 11 à 14, dans lequel pour réaliser la bande- support (101) on met en forme une bande métallique (111) en en rabattant les bords longitudinaux l'un vers l'autre et en la recouvrant d'un revêtement en matériau compact.15 The manufacturing method according to one of claims 11 to 14, in which to produce the support strip (101) a metal strip (111) is shaped by folding the longitudinal edges towards each other and by covering it with a coating of compact material.
16 Machine (1) de fabrication d'une bande de joint d'étanchéité (100) comprenant des moyens (10) pour réaliser une bande-support de fixation du joint et des moyens (80,51) pour mouler une bande d'étanchéité (103) et la solidariser à la bande-support (101), caractérisé par le fait que les moyens (80,51) pour mouler la bande d'étanchéité (103) comprennent une bande sans fin (80) constituée d'une pluralité de moules élémentaires (51) contigus, et agencée pour être entraînée autour de deux rouleaux (85) avec un brin de moulage (81) et un brin de retour (82).16 Machine (1) for manufacturing a seal strip (100) comprising means (10) for producing a support band for fixing the seal and means (80,51) for molding a seal strip (103) and secure it to the support strip (101), characterized in that the means (80,51) for molding the sealing strip (103) comprise an endless strip (80) consisting of a plurality contiguous elementary molds (51), and arranged to be driven around two rollers (85) with a molding strand (81) and a return strand (82).
17 Machine selon la revendication 16, dans laquelle sont prévus des moyens (45) pour solidariser la bande d'étanchéité (103) à la bande-support (101), et des moyens de positionnement (90) de la bande-support (101) par rapport à la bande sans fin (80) des moules élémentaires (51).17 Machine according to claim 16, in which are provided means (45) for securing the sealing strip (103) to the support strip (101), and positioning means (90) of the support strip (101 ) relative to the endless belt (80) of the elementary molds (51).
18 Machine selon la revendication 17, dans laquelle les moyens de positionnement (90) comprennnent une bande sans fin (90) agencée pour défiler au-dessus de la bande sans fin (80) des moules élémentaires (51) avec un brin de positionnement (92) défilant en synchronisme avec le brin de moulage (81) de la bande d'étanchéité (103). 18 Machine according to claim 17, wherein the positioning means (90) comprise a endless strip (90) arranged to pass above the endless strip (80) of the elementary molds (51) with a positioning strand (92) running in synchronism with the molding strand (81) of the strip sealing (103).
PCT/FR1998/000061 1998-01-14 1998-01-14 Sealing joint strip, method for making the joint strip and machine for making the joint strip WO1999036283A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/FR1998/000061 WO1999036283A1 (en) 1998-01-14 1998-01-14 Sealing joint strip, method for making the joint strip and machine for making the joint strip
AU58713/98A AU5871398A (en) 1998-01-14 1998-01-14 Sealing joint strip, method for making the joint strip and machine for making the joint strip

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FR1998/000061 WO1999036283A1 (en) 1998-01-14 1998-01-14 Sealing joint strip, method for making the joint strip and machine for making the joint strip

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2835924A (en) * 1954-01-18 1958-05-27 Gen Motors Corp Method of molding rubber foam latex strips and the like
US3689612A (en) * 1969-05-14 1972-09-05 Jun Taga Method for extruding into cavities defined by a fixed plate and moving metal molds a foamable on non-foamable thermoplastic polymeric resin
FR2314994A1 (en) * 1975-06-21 1977-01-14 Draftex Dev Ag U-PROFILEED SEALING TAPE AND EMBODIMENT PROCESS
EP0115750A1 (en) * 1983-01-06 1984-08-15 S.A.I.A.G. S.p.A. Weather strip for motor vehicle bodies
EP0428349A2 (en) * 1989-11-14 1991-05-22 Tokai Kogyo Kabushiki Kaisha Weather strip and apparatus and process for manufacturing the same
US5376319A (en) * 1992-01-31 1994-12-27 Tokai Kogyo Kabushiki Kaisha Process for manufacturing a weather strip

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2835924A (en) * 1954-01-18 1958-05-27 Gen Motors Corp Method of molding rubber foam latex strips and the like
US3689612A (en) * 1969-05-14 1972-09-05 Jun Taga Method for extruding into cavities defined by a fixed plate and moving metal molds a foamable on non-foamable thermoplastic polymeric resin
FR2314994A1 (en) * 1975-06-21 1977-01-14 Draftex Dev Ag U-PROFILEED SEALING TAPE AND EMBODIMENT PROCESS
EP0115750A1 (en) * 1983-01-06 1984-08-15 S.A.I.A.G. S.p.A. Weather strip for motor vehicle bodies
EP0428349A2 (en) * 1989-11-14 1991-05-22 Tokai Kogyo Kabushiki Kaisha Weather strip and apparatus and process for manufacturing the same
US5376319A (en) * 1992-01-31 1994-12-27 Tokai Kogyo Kabushiki Kaisha Process for manufacturing a weather strip

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