PROFILED MEMBER WITH A TEAR STRIP

Abstract

A profiled member having two faces and having at least one tear strip with two edges arranged on and adhered to one face of said profiled member, the tear strip having at least one non-adhered edge. The non-adhered edge makes it possible not only to more easily take hold of and remove the tear strip, but also prevents a piece of the tear strip from remaining on the profile member and hindering the adhering of the profiled members to each other. The two edges of the tear strip may be non-adhered, and, when the profile member is covered by a tear strip on each face, the two tear strips are each non-adhered on at least one side. The profile member can be either flat or circular.

Claims

1. A process for production of a profiled member, comprising a step of adhering a peelply, and a step of unsticking at least one edge of the peelply, in that the profiled member is pultruded, and in that the step of unsticking is carried out at the output from the die.

2. The process as claimed in claim 1, wherein the step of unsticking is carried out by a blade.

3. The process as claimed in claim 1, wherein the step of unsticking is carried out in hot conditions

4. The process as claimed in claim 1, wherein the step of unsticking is carried out during the polymerization.

5. The process as claimed in claim 2, wherein the blade has an inclination relative to the plane of the profiled member.

6. The process as claimed in claim 2, wherein the blade is aligned with the plane of the profiled member.

7. The process as claimed in claim 1, wherein the profiled member and the peelply are machined at the second edge of the peelply.

8. The process as claimed in claim 1, wherein a side of the profiled member is covered with a veil at the second edge of the peelply, and said veil is placed below the edge of said peelply.

9. The process as claimed in claim 1, wherein at least one edge of the peelply is folded back.

10. A profiled member with two faces having at least one peelply with two edges disposed and glued on a side of said profiled member, characterized in that it is produced by the process as claimed in claim 1.

11. An assembly comprising at least two profiled members as claimed in claim 1, wherein the two profiled members are glued to one another.

Description

DESCRIPTION OF THE FIGURES

[0024] Other advantages may also become apparent to persons skilled in the art from reading the examples below, illustrated by the appended figures, and provided by way of example:

[0025] FIG. 1 is a view in cross-section of a profiled member covered with a peelply according to the prior art;

[0026] FIG. 1a shows the detail A in FIG. 1;

[0027] FIG. 2 is a view in cross-section of two glued profiled members according to the prior art;

[0028] FIG. 3 is a profiled member according to the invention with different positions of the blade;

[0029] FIGS. 3a and 3b illustrate the detail B of FIG. 3, with two other possible positions of the blade;

[0030] FIG. 4 is a first variant of a profiled member according to the invention;

[0031] FIG. 5 is a second variant of a profiled member according to the invention;

[0032] FIG. 6 illustrates a third variant of a profiled member according to the invention.

[0033] The profiled member 1 according to the prior art, illustrated in FIG. 1, is covered by a peelply 2, and this peelply 2 is disposed on the profiled member during its production, consequently creating a rim 10 between the edge of the peelply 2 and the end of the profiled member 1. This rim 10 can embed the end of the peelply 2, as shown in the detail in FIG. 1a. After the strip 2 has been removed, the rim 10 remains, and during the gluing of the profiled members 1 to one another, a space 3 remains, thus limiting the gluing of the faces 12 and 13 of the profiled members to restricted areas 120 and 130. It can also be seen that the rim 10 impedes the grasping of the peelply 2, resulting in a risk of tearing and/or remaining of fibers on the rim 10.

[0034] The profiled member according to the invention, illustrated in FIG. 3, shows a blade 4 cutting the rim 10 of the profiled member, and unsticking the edge 20 of the peelply 2. A second blade 40 is disposed on the other face, in order to unstick the second peelply 2. In this example, the blade 40 has not completely cut the rim 10. The blade is mobile, so that it can be positioned according to the width of the strip. On the other side, a variant is illustrated, where a third blade 41 is inclined relative to the plane of the profiled section 1, thus making it possible to ensure that the gluing surface of the profiled members corresponds to an area where the peelply 2 was positioned.

[0035] FIGS. 3a and 3b show two other possible arrangements of the blade 4, parallel to the rim 10 (FIG. 3a) or inclined (FIG. 3b).

[0036] In FIG. 4, according to a first variant, a side 11 of the profiled member 1 is machined partly in order to release the edge 21 of the peelply 2, and thus facilitate access to it. In the case when the profiled member 1 comprises two peelplies 2 and 2, both faces 12 and 13 of the profiled member 1 will be machined. The machining can also be carried out on all of the thickness of the profiled member 1, thus releasing the two peelplies 2 and 2. It is also possible to machine both sides 11 and 14 of the profiled member 1. There is then no unsticking of the peelply 2.

[0037] FIG. 5 shows a second variant, where a veil 5 has been disposed on the side 11 of the profiled member 1, in order to prevent embedding or covering of the peelply by carbon fibers and/or matrix. The edge 21 of the peelply 2 is independent from the profiled member, and can easily be seized. A veil 5 can be provided on both sides 11 and 14 of the profiled member 1. There is then no unsticking of the peelply 2.

[0038] FIG. 6 shows a third variant, where the peelply has been folded back at the ends 20 and 21, in order to make it possible for the rim 10 not to be able to come into contact with these ends 20 and 21 of the peelply. There is then no longer a risk of a residue of strip remaining after the peelply has been unstuck. There is then no unsticking of the peelply 2. The folded-back parts 202 and 210 can easily be detached by hand or with a blade.

DETAILED DESCRIPTION OF AN EMBODIMENT

[0039] A description will now be provided of a preferred process for production of these profiled members.

[0040] The profiled member 1 is produced according to a process with a first standard molding or pultrusion part, with putting into place of at least one peelply 2, then the profiled member 1, still hot at the end of polymerization, passes in front of the blades (4, 40, 41) where at least one edge 20 of the peelply 2 is unstuck.

[0041] For the pultruded profiled members, there is impregnation of the fibers, drying, putting into place of the peelplies, then polymerization in the die, a start of unsticking of the peelply in the manufacturing line by the blades at the output from the die when the product is still at the appropriate temperature at the end of polymerization, traction of the pultruded profiled member, and winding along the flat parts with the peelplies started over all or part of the profiled member.

[0042] It can be envisaged to carry out the tearing away in cold conditions, although this is more complex to carry out since the adhesion and embedding of the strip on the die are greater, in particular for a PES strip on a profiled member made of carbon/epoxide.

[0043] It is also possible to carry out the tearing away in hot conditions outside the process of production of the profiled member. It is then necessary to carry out an additional step of heating of the profiled member at the moment of tearing away of the strip, either in line before the gluing of the profiled members to one another, or as reworking in the other cases.