FR2594521A1 - HOLLOW PROFILE - Google Patents

Abstract

Hollow section, consisting of a mixture of synthetic material and fibers, comprising one or more cavities extending in the longitudinal direction of the hollow section, an internal reinforcing lining made of a non-extensible material being embedded in the wall of the hollow section. In order to produce a hollow section which can withstand a very high internal pressure despite a very reduced weight, a reinforcing material in strip and flat form is used as internal reinforcement lining 3, this material being provided with cutouts 6a, 6b and consisting of, at its ends 5a, 5b coming into mutual contact with protrusions 7 penetrating into each other, so that there is no position of interruption inside the reinforcing material. This hollow profile can be used particularly advantageously as a pipe for cold and hot water, when at least the internal wall of the hollow profile is covered with a gas barrier layer. (CF DRAWING IN BOPI)

Description

The invention relates to a hollow profile constituted by a

  mixture of fibers and synthetic material, with one or more

  cavities extending in the longitudinal direction of the

  hollow yarn, an internal reinforcing

  killed by a non-extensible material being embedded in at least one

  the outer wall of the hollow section.

  In the German patent application P 35 07 640.2 is described a method of manufacturing reinforced profiled elements, in which we begin by making a hollow profile element

  comprising one or more cavities according to the method of the ex-

  trusion, then it is incorporated in the cavity or cavities of the profile

  a reinforcing load made of hard synthetic

  cissable; while at the same time as incorporating the synthetic material load is embedded at least one reinforcing interior lining in a material not likely to

  expand over the entire length of the benefit element.

  the. The material for the synthetic filler may consist of a mixture of synthetic material and

  wood fiber, which provides a benefit element.

light weight.

  In order for the reinforcing liner to be held firmly within the synthetic material load, the inner lining of reinforcement may be provided on its outer surface with recesses, grooves or

  notches extending transversely to its longitudinal direction

  tudinale. In addition, there is at least one inner lining

  reinforcement in the profiled element in a posi-

  in which it is stressed in tension when the profiled element is biased in flexion transversely to

its longitudinal extent.

  Thanks to this specific constitution of an element pro

  spun, its resistance to bending is considerably improved.

  This makes it possible to use profiled elements of this type, for example for the cladding of balconies, the production of balcony floors or even

flooring.

  But the profiled elements of this type are not suitable if it is to pass inside a liquid or gaseous agent subjected to a relatively high pressure, is known from DE-OS 28.27 851 a profiled strip of

  construction, in particular a profiled strip intended for the

  window frames, in which the hollow profile is made of a thermoplastic synthetic material such as

  that of CPV and in which a charge containing a matrix

  this synthetic material is introduced into the cavities of

  the hollow profile element. The special nature of this

  profile of known construction consists in the fact that the indicated load comprises a matrix of methylmetacrylate

  with small hollow silicate beads as a

  ge. A building profile of this type can also be

  made of fibers oriented in the longitudinal direction of the strip, and in particular fibers

  of glass, are drowned in the load.

  GB-PS 12 98 823 discloses a method of carrying out

  of a profiled element in which are provided, seen in the direction of the cross section of the profiled element, two

  different types of synthetic materials, a layer of

  the outer loppe being constituted by a thermoplastic material

  while an inner core consists of a thermosetting resin. But it is not possible to use a

  reinforcement lining with this profile element

known.

  The object of the invention is to provide a hollow profile that

  of a mixture of synthetic material and fibers,

  able to withstand high internal pressure despite its reduced weight and ease of manufacture, the profiled element

  hollow also having excellent isolating properties.

thermal energy.

  Starting from the hollow section formed by a mixture of

  synthetic fiber and of the type mentioned in the preamble

  bule, this object is achieved according to the invention because: a) the mixture of synthetic material and fibers is constituted by a mixture of synthetic material and wood fibers,

  (b) the reinforcing liner is

  staked by a flat and band-shaped reinforcing material,

  c) the band-shaped reinforcing material is

  no cuts, and d) the ends of the band-shaped reinforcing material in contact with each other are provided with protrusions

  penetrating into each other.

  By using a mixture of synthetic material and fibers in the form of a mixture of synthetic material and

  of wood fiber, it is possible to maintain the weight to-

  the hollow profile has a relatively reduced level.

  By using a reinforcing liner in the form of a flat strip, mechanical reinforcement is obtained

  very pronounced hollow profile, especially its outer walls.

  internal connection between the hollow profile material and the reinforcing inner lining is obtained by

  the cuts made up in large numbers in the filling.

  These cutouts may have any shape, for

  example the shape of rectangles, slits or circles.

  With regard to the reinforcing interior

  In the form of a strip, a starting material is used which extends substantially in one plane. This reinforcing material

  in the form of a strip is then curved according to the shape in sec-

  cross section of the hollow section concerned, where it results boligatorily two opposite ends (marginal regions) because in this place the internal reinforcement lining

  presents an interruption necessitated by the manufacturing process

cation.

  To effectively eliminate this interruption,

  The mutually reinforcing strip-forming reinforcing material is provided, according to the invention, with interpenetrating projections so that there is no interruption of the reinforcing effect in the end regions. of the

  reinforcement lining.

  In addition, a very diversified possibility of use is obtained by placing on the inner wall of at least one cavity a barrier layer against the gases. The hollow profile can then be used, for example and preferably as a conduit for the transmission of gases or liquids,

  for which high pressures are possible.

  An advantageous constitution of the invention lies, moreover, in the fact that a gas barrier layer is also applied to the outer surface of the hollow section. These barrier layers may be advantageously constituted by a copolymer of ethylene and alcohol

  vinyl (CEAV), this specific synthetic material

  whose trade name is "CLARENE" (registered trademark)

  having exceptional blocking properties vis-à-

  screw 02 'CO2 and other gases. Such copolymers can

  can be used particularly advantageously for the coextrusion of sheets or tubes - in connection with

  polyolefins, polyesters and other synthetic materials.

  This specific synthetic material has a very high barrier effect against dry gases, can be machined very easily, is resistant to fats, oils and a large number of chemicals.

  to UV light, has only a very low electrostatic charge

  and does not pose physiological problems.

  A hollow profile equipped with this barrier layer (inside and / or outside) can therefore be used particularly advantageously, for example as a cold water pipe and hot water, to which s' add the fact

  that the hollow profile also has an ability to isolate

exceptional thermal performance.

  The hollow section may have a cross-section

  the rectangular with several cavities close to each other, or a circular cross section with a

  single cavity along its entire length, or several

  separated from each other by intermediate walls

  res. The reinforcement lining is advantageously constituted by a tale piece provided with a plurality

openings or bores.

  However, the reinforcing lining may also be constituted by a wire mesh grid

or by a textile fabric.

  The material of the reinforcing interior lining

  may be made of a wide variety of metals,

  metal binders or a particular synthetic material

  Hardly hard at low extensibility.

  Additional reinforcement of the profile can be achieved

  hollow against bending by drowning, moreover, in the pa-

  king of the hollow profile an inner lining of reinforcing fiber or son. Preferably, the synthetic material of the mixture of synthetic material and wood fibers is

polyvinyl chloride (CPV).

  The invention will now be explained in more detail in the following, in one embodiment, with reference to the single plate of the accompanying drawing in which: FIG. 1 is an end view of a hollow section of rectangular shape having the features of the invention, and FIG. 2 is a partial view of an interior trim

  reinforcement used in the hollow section of FIG. 1.

  In FIG. 1, a hollow section presenting the characteristics

  of the invention is generally designated 1, and

  this hollow profile has a rectangular cross-section

  lar. The hollow section consists of a mixture of

  synthetic fiber and wood fiber 2 and a

  The reinforcing material 3 is embedded in this material, this lining being preferably made in advance before the manufacture of the hollow profile from a portion of t8le.

flat and flat.

  In the embodiment shown, the surface

  the dull wall of the hollow section is equipped with a barrier layer against the gases 4, this barrier layer being,

  be subsequently incorporated by introducing into the

  hollow spun material in a liquid form and forming a barrier layer, which produces a layer which adheres to the inner wall and which then hardens, either by executing the layer of

  dam 4 using a coextrusion process.

  It should be indicated that it is also possible to

  arrange on the outer surface of the hollow profile a further

  barrier layer (not shown) to achieve a

  general protection against corrosion. In this last

  of embodiment, the material of the hollow profile is then

  surrounded on all sides by a barrier layer of

  tection. The synthetic material of the synthetic material mixture

  The fiber and fiber used is, for example,

  polyvinyl chloride, while the fibers are advantageously

  wood fibers which may have a length of gold

0.5 to 5 mm in size.

  Fig. 2 shows the end region of the trim

  reinforcement in lateral view, this region of ex-

  tremity being designated 5 in FIG. 1. In this region

  end, the two ends 5a and 5b of the lining

  reinforcement apply against each other.

  To avoid an interruption of the reinforcing effect

  In this position of contact, the ends 5a and 5b are respectively equipped with projections 7, while between

  the projections consist of semi-shaped recesses

  circular. This results in the possibility of interpenetration

  protrusions in the manner of a comb, so that

  no interruption of the reinforcing interior

can not exist.

  In the embodiment shown, it is a sheet metal part comprising a plurality of openings 6a located one above the other at determined heights (lines),

  and openings 6b (in the other end 5b) which are also

  placed on several lines superimposed on one

  different from that of the openings 6a.

  In the embodiment shown, the openings

  6a and 6b are circular in shape, but they can also be

  to have the shape of rectangles, slits, stars, etc.

  With regard to the reinforcing interior

  advantageously, falls from

  of the realization of setting washers, for example by es-

  tampage. The only condition is that the holes stamped in

  the relevant section of sheet metal are arranged in several

  with respect to one another in the longitudinal direction so as to automatically obtain end regions on which the projections 7 which are separated from one another by means of

semicircular shape.

  Thanks to the offset arrangement of the projections 7 of one end

  5a relative to the projections of the other end 5b, the two ends 5a and 5b can be joined to each other,

  the protrusions of a penetrating end in the manner of a

  in the recesses of the opposite end 5b. We can

  thus to incorporate in the material of the hollow profile

  reinforcing inner zone within which

there is no interruption.

  The reinforcement lining 3 can also be

  made from a piece of plate, for example a

  aluminum plate, a copper plate or iron sheet, or

  core steel when the requirements are particularly

high.

  There is, moreover, the possibility of realizing the

  reinforcing interior reinforcement 3 by means of a

  metallics or sieve in wire cloth. Another possibility

  lity consists in producing the reinforcing interior

  by means of a large-mesh textile fabric.

  In any case, it should be noted that when using a material that is not extensible, one obtains, by

  interior reinforcement lining, a no-

  flexural stiffness table of the hollow profile when the trim as well as this is shown also in the mode

  of embodiment - is embedded in the hollow profile in a location

  cement as it is stressed in tension when the profile

  hollow is subjected to a bending stress.

  According to another variant, it is possible to incorporate into the material of the hollow profile (for example in walls

  intermediates), and in addition to the interior trim of

  of course, another reinforcement fiber or son, which may also consist of fibers or

intertwined threads.

  Tests have shown that a hollow profile with

  the features of the invention can withstand

  very high internal costs and is just as valid as a

steel tube.

  The hollow profile according to the present invention can therefore be advantageously used as a cold water pipe or hot water pipe, or cold water pipe and hot water combined, the cavity for the passage of water froi-

  according to an advantageous embodiment (not

  presented) be separated from the cavity for the passage of hot water through another intermediate cavity so as to obtain a highly effective thermal insulation between

cold water and hot water.

  A number of other modifications and variations are possible for those skilled in the art without departing from the scope of the present invention. Thus, there is the possibility of constituting the hollow profile

  in the form of a multiple tubular conduit, each

  pick with a circular cross-section and the

  individual tubular sections being connected to each other

  through a single connecting wall, hence the possibility of

  when laying a multiple tubular pipe, to cut lengths of individual tubes from the

  sectioning the connecting wall between two tubular ducts

res.

  All the technical details mentioned in the description

  and shown in the drawing are important for the invention.

Claims (13)

  1. Hollow section consisting of a mixture of fibers and   of synthetic material, with one or more cavities extending   in the longitudinal direction of the hollow section, a packing   internal reinforcing section consisting of a non-extensible material being embedded in at least the outer wall of the hollow profile, characterized in that: a) the mixture of synthetic material and fibers (2)   consists of a mixture of synthetic material and wood,   (b) the reinforcing lining (3) is   formed by a flat, banjo-shaped reinforcing material   of, c) the band-shaped reinforcing material (3) is provided with cut-outs (6a, 6b), and d) the ends (5a, 5b) of the band-shaped reinforcing material (3) in contact with each other. mutual are equipped with   protrusions (7) penetrating into each other.   Hollow section according to Claim 1, characterized in that a barrier layer (4) against the gases is applied.   on the inner wall of the cavity or cavities.   Hollow section according to claim 1, characterized in that a barrier layer against the gases is applied   on the outer surface of the hollow profile (1).   Hollow section according to claim 2 or 3, characterized   in that the barrier layer (4) is constituted by a   copolymer of ethylene and vinyl alcohol.   5. Hollow section according to any one of the claims   previous arrangements, characterized in that the hollow profile (1)   has a rectangular cross section.   6. hollow profile according to claim 5, characterized in that two cavities separated from each other by a wall   intermediate are formed in the hollow section (1).   7. Hollow section according to any one of the claims   1 to 4, characterized in that the hollow profile   a cross section of circular shape.   8. Hollow section according to any one of the claims   previous arrangements, characterized in that the inner lining   The reinforcing member (3) is constituted by a plate member comprising a plurality of openings or bores (6a, 6b).   Hollow section according to any one of the claims   1 to 7, characterized in that the inner lining of   reinforcement X3) is constituted by a metal grid.   10. Hollow section according to any one of the claims   1 to 7, characterized in that the inner lining of   reinforcement (3) is constituted by a fabric.   Hollow section according to any one of the claims   previous arrangements, characterized in that an interior lining   reinforcement of additional fiber or yarn is drowned   in the wall of the hollow profile (1).   12.Hollow profile according to any one of the claims   preceding, characterized in that the synthetic material of   mixture of synthetic material and wood fiber is con-   replaced by polyvinyl chloride (CPV).   13. Hollow section according to any one of the claims   tions, characterized by its use as a   cold water and hot water pipe.