FR2478559A1 - AUTOCOLLATING STICK FOR THE PROTECTION OR DECORATION OF A MOTOR VEHICLE - Google Patents

Abstract

SELF-ADHESIVE PROTECTIVE AND OR DECORATIVE STICK ON A MOTOR VEHICLE BODY OF THE KIND OF THOSE WHICH INCLUDE A BEARING STICK BODY 10, PREFERRED FROM A SEMI-RIGID THERMOPLASTIC MATERIAL, AND A LAYER OF ADHESIVE 18 LINED TO THE BODY BAGUETTE. THE ADHESIVE LAYER 18 CONSTITUTED BY A SELF-ADHESIVE AGENT, IS ARRANGED ON THE SURFACE OF AN ELASTIC EXPANDED STRUCTURE 16 DURABLY BONDED TO THE BODY 10 OF THE BAGUETTE.

Description

The invention relates to a protection and / or decoration rod,

  adhesive on a motor vehicle body, comprising a carrier rod body, preferably made of a thermoplastic material semi-rigid formulation and a layer of adhesive bonded to the body of the rod. It is known to fix protection rods

  against collisions, protection rods

  decorative rods, and others on a body-

  series of automobiles through adhesive tapes.

  Adhesive tapes are usually constituted by a support of expanded material, covered on both sides by a self-adhesive product, which allows the adaptation of the shape of the rod to that of the body. Tapes, adhesives are often hand-fixed on the pre-made stick. This requires significant work that is felt for items of this type, manufactured in series, by its effects on manufacturing costs or assembly. Moreover, the precise placement on the stick of adhesive tapes

  in general very long does not lack difficulty. Other inconveniences

  This fastening method can be applied only to substantially flat parts of the surface of the rod, which are often insufficiently wide, especially for relatively small rods, and which do not allow the tape to anchor to the rod because of the shape of these two parts, something that may be desirable for

  improve the strength of the link.

  The aim of the invention is to improve the usual sticks of protection or decoration which can be glued, both by rationalizing the manufacture and / or the assembly, than by making the

stronger and more reliable bond.

  To solve this problem it is proposed, according to the invention

  the adhesive layer, consisting of a self-adhesive

  adhesive, is disposed on the surface of an expanded structure

  elastic permanently bonded to the body of the rod.

  It is advantageous that the body of the wand

  a lip covering laterally outward the expanded structure. It is preferable that the expanded structure is disposed in a concave profile depression of the body of

  baguette and, by that of its faces which carries the layer of adhesive

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  sif, protrudes outward over the depression.

  It is also advantageous that the free surface of the

  layer of adhesive is provided with a tear-off protective strip.

  According to an advantageous embodiment, the body of the tray is provided with at least one metal strip

  It is located outside of the structure of the exited structure.

  The manufacture of the rods according to the invention can, in various ways, be done completely automatically and therefore very rational: coextrusion of the rod body and the expanded structure; separate manufacture, for example extrusion, of the rod body and the expanded structure, then assembly; - subsequent fixation by gelling, using plaeisols,

  of the expanded structure on a pre-wand body

  made; - Expansion after treatment by treating the foamable structure on a rod body previously manufactured; - Deposition, by injection, of the expanded structure on a body

  of rod obtained by injection molding.

  In all these cases the adhesive layer is applied

  afterwards on the free surface of the expanded structure.

  The bonding surface between the rod body and the expanded structure may have a largely arbitrary shape,

  be curved or undercut.

  It may be advantageous to obtain a better lasting bond, when using pre-made batten bodies, to provide the part of the body surface with a stick, where necessary, with a bonding mediator. or a

  layer of adhesive primer before applying the expanded structure

See.

  The drawing shows in schematic section a preferred embodiment of a rod of detection and

decoration according to the invention.

  The rod body 10, preferably made of a thermoplastic with a semi-rigid formulation, bears on its inner surface concealed laterally by the curved lateral regions 11 a metal stiffening strip 12 and on

  its outer surface, an equally metallic strip 14 serving

  for decoration and reinforcement. On the front surface of the side regions 11 the wand body is invariably bonded to an expanded structure on each side. elastic member 16 which in turn bears a layer of adhesive 18, which is

  self-adhesive product, and protected by a tear tape 20.

  To attach the rod to a vehicle body

  Instead of pulling out the protective strip 20, it is sufficient to press the strip, by its adhesive side, against the surface of the bodywork. Any unevenness of the surface of the bodywork is compensated by the elasticity of the expanded structure. Once the rod is in place, the two expanded structures 16 are, outwardly turned, covered by the lips 22 formed in the molding on the regions.

lateral 11.

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-, 2478559

R e v e 'd i-'c: a: ti o n s

  1. Self protection and / or decoration wands

  adhesive on a motor vehicle body, comprising a carrier rod body, preferably made of a thermoplastic material with a semi-rigid formulation and a layer of adhesive bonded to the rod body, characterized in that the layer of adhesive ( 18), consisting of a selfadhesive agent, is disposed on the surface of an elastically expanded structure (16).

  durably connected to the body (10) of the rod.

  2. Rod according to claim 1, characterized in that the rod body (10) has a lip (22) covering laterally outwardly the expanded structure (16).

  3. Wand according to one or other of the claims

  1 and 2, characterized in that the expanded structure (16) is arranged in a concave profile depression of the rod body (10) and, by that of its faces which carries the layer (18) of adhesive, outward over the depression.

  4. Baguette according to one. any of the claims

  1 to 3, characterized in that the free surface of the

  layer (18) of adhesive is provided with a protective protective strip

chable (20).

  5. Wand according to any one of the claims

  1 to 4, characterized in that the rod body (10) is provided with at least one metal strip (12, 14) which is

  1 outside the region of the expanded structure.

  6. Process for the manufacture of a baguette

  protection and / or decoration according to any of the

  Claims 1 to 5, characterized in that the expanded structure

  is coextruded with the stick body, the adhesive layer

  sif being then applied to the free surface of the expanded structure.

  7. A method of manufacturing a protection rod

  and / or decoration according to any one of the claims

  tions 1 to 5 ,. characterized. in that the rod body and the expanded structure are manufactured separately and then assembled and the adhesive layer is subsequently applied to the surface

free of the expanded structure.

  8. Process for the manufacture of a product rod

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  tection and / or decoration according to any one of the

  1 to 5, characterized in that on the pre-made rod body the foamable structure is preferably expanded by treatment, the adhesive layer then being applied to the free surface of the expanded structure. 9. Process for the manufacture of a baguette

  protection and / or decoration according to any of the

  Claims 1 to 5, characterized in that the expanded structure is gel-bonded with a plastisol to the pre-made rod body, the adhesive layer being then applied to the free surface of the the expanded structure. 10. Process for the manufacture of a baguette

  protection and / or decoration according to any of the

  Claims 1 to 5, characterized in that the wafer body obtained by the injection molding process is subsequently covered, by injection, with the expanded structure, the adhesive layer being then applied to the free surface of the

expanded structure.

  11. Process according to any one of the claims

  7 to 9, characterized in that the rod body, manufactured in advance, is provided before application of the expanded structure, and on the part of its surface where it is necessary, a

  adhesion mediator or an adhesive primer.