CA2790128C – April 9, 2019 – THERMOPLASTIC FRAME FOR A SEALING OR WHEEL COVER PROFILED ELEMENT OF A MOTOR VEHICLE, PRODUCTION METHOD THEREOF, AND PROFILED ELEMENT COMPRISING SAME

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Inventors :

BARATIN SYLVAIN; CHAPEAU PHILIPPE; CHARLES MIKAEL

Owner :

B60J10 / 18; B60J10 / 00; B60J10 / 21

Application Number :

CA2790128

Document Number :

CA2790128C

Priority Date :

May 20, 2010

Filing Date :

May 20, 2011

Date of Grant/ Publication :

April 9, 2019

Class :

HUTCHINSON

Abstract

The invention provides a bendable thermoplastic reinforcement for a profiled seal or profiled molding of a vehicle, such a profiled element including same and a method for producing the reinforcement. The reinforcement of substantially U-shaped cross section, has a central portion and two arms, each arm having over its length a series of limbs separated from one another by slots. Over at least one part of the length of the reinforcement, each limb has laterally an asymmetrical geometry and an area greater than that of each adjacent slot. The reinforcement is produced by extrusion of a thermoplastic material via a die of U-shaped profile formed between an extruder head and a receiving member for the material being discharged from the head which is provided with a hollow cavity designed to form directly said central portion, the slots and limbs, so that the extruded material progressively covers the receiving member.

Claim(s)

1. Bendable thermoplastic frame substantially U-shaped cross section, the U-shaped frame having a web and two flanges, each flange of the U comprising along its length a succession of legs that are separated from each other by perforations originating at a same height along each of said arms of the U shape at the junction between each wing of the U of the U-back, characterized in that on at least a portion of the length of the backbone, each leg has a laterally asymmetric geometry and a greater area than the adjacent each aperture.;
2. The reinforcement according to claim 1, characterized in that said wings comprise a succession of pairs of said asymmetric legs which, within each pair, are formed laterally opposite one another and each have a free end of minimum width which is offset from a plane that pair located equidistant from the birth of said perforations surrounding each leg.;
3. The reinforcement according to claim 2, characterized in that each leg has a substantially asymmetric sawtooth shape comprising two tooth edges which each have a straight or curved profile and which converge at said free end of pointed or rounded shape, such that said at least one frame portion is substantially in the form of saw teeth whose teeth are inclined side.;
4. The reinforcement according to claim 3, characterized in that each leg has a substantially asymmetric comma which one of said tooth edges is curved convexly and the other tooth edge is substantially straight or curved in a concave manner.;
5. Frame according to any of claims 1 to 4, characterized in that all or some of said legs, are each tapered with at least one of: a longitudinal width and a continuously decreasing cross-sectional thickness (e) towards the free end of the corresponding leg.;
6. The framework of claim 5 wherein the whole or part of said legs includes said legs laterally asymmetrical.;
7. Frame according to any of claims 1 to 6, characterized in that said perforations extend from substantially at the junction between each wing and said core, which is complete or perforated.;
8. The framework of claim 2 or claim 7, characterized in that said core is perforated by presenting a succession of transverse openings formed staggered with respect to said apertures.;
9. The framework of claim 8 wherein at least one of said transverse openings extending on both respective legs of said wings which are formed opposite the light.;
10. Frame according to any of claims 1 to 9, characterized in that it is extruded, said openings and said legs being integrally extruded directly.;
11. Frame according to any of claims 1 to 10, characterized in that it is made of at least one thermoplastic material capable of being extruded and having a Young’s modulus of between 1000 mpa and 10000 mpa.;
12. The framework of claim 11 wherein the Young’s modulus is between 2000 mpa and 6000 mpa;
13. The framework of claim 11 or 12, characterized in that said thermoplastic material is based on at least one thermoplastic polymer (PKC) which is selected from the group consisting of polypropylenes, polyamides, polyvinyl chlorides (PVC-), the polymethyl methacrylates (PMMA-), the terpolymers acrylonitrile-butadiene-styrene (ABS-) and mixtures thereof.;
14. The framework of claim 13 wherein polypropylenes includes a polypropylene reinforced with a filler selected from the group consisting of talc, hemp, glass fibers and mixtures thereof.;
15. Frame according to any of claims 1 to 14 or the armature is for a sealing strip or a trim motor vehicle.;
16. Sealing profile or a trim motor vehicle having a frame and at least one thermoplastic elastomer coating softer than this framework and extruded thereon, characterized in that the armature is defined according to any one of claims 1 to 15.;
17. Sealing profile according to claim 16 wherein the coating elastomer is based on at least one thermoplastic elastomer (TPE’s) or of at least one rubber.;
18. Sealing profile according to claim 17 wherein the rubber is EPDM.;
19. Profile according to any one of claims 16 to 18, characterized in that it comprises essentially: a clamp portion which is reinforced by said frame for mounting it on a frame rebate and whose coating is made of a material compatible with that of the armature and a sealing portion resiliently deformable tubular or lip, which is made of an elastomeric material which extends the clip portion of the U a wing.;
20. Profile of claim 19 wherein the material compatible with that of the armature is based on at least one thermoplastic elastomer (TPE’s) or a thermoplastic vulcanisate (TPVs).;
claim 21: 21. Profile according to claim 20 wherein the thermoplastic elastomer is a styrene thermoplastic elastomer (fps).;
claim 22: 22. Profile according to any one of claims 19 to 21 wherein the elastomeric material is a cellular elastomer material.;
claim 23: 23. A method of manufacturing a reinforcement according to any one of claims 1 to 15, characterized in that it comprises extrusion of at least one thermoplastic material through a die formed between a U profile extruder head and a member for receiving the material leaving this head which is provided with a hollow recess adapted to directly form said core, said openings and said legs, such that the extruded material thus progressively covers said receiving element, then separation of that material with the receiving member.;
claim 24: 24. The method according to claim 23, characterized in that said die is formed by a die head fixed covering tangentially the periphery of a wheel which forms said receiving member and which rotates about its axis (the X) so that its periphery engages within the head so that the extruded material progressively covers the periphery of wheel during its rotation, which periphery has, on the one hand, two peripheral flanks each having two radial indentations of serrations forming said legs and said apertures when said cover by said material and, on the other hand, a top circumferential peripheral having a hollow recess constituting said core during its cover.;
claim 25: 25. The method according to claim 23, characterized in that said die is formed by a die head fixed covering tangentially the periphery of a track or a treadmill which forms said receiving member and whose kinematic comprises a sequence of movements of translation and rotation about two axes, such that the periphery of the track or the mat enters the inside of the head to the extruded material that progressively covers the periphery during its kinematics, which periphery has, on the one hand, two peripheral flanks each having two radial indentations of serrations forming said legs and said apertures when said cover by said material and, on the other hand, a top peripheral having a hollow recess constituting said core during its cover.;
claim 26: 26. The method of any of claims 23 to 25, characterized in that it is free of postforming step of said at least one extruded thermoplastic material.;
claim 27: 27. The method of claim 26 in that it is free of a step of cutting, sawing, scoring or calendering said at least one extruded thermoplastic material.

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