FR2784731A1 - SEALING DEVICE COMPRISING A POLYMER SEAL - Google Patents

Abstract

The invention relates to a sealing device comprising at least one sealing gasket (1) of polymeric material, the sealing gasket (1) being designed as a completely closed frame and peripherally surrounding a support plate (2) and being connected with the latter by conjugation of shapes, but removable. The invention further relates to a sealing device comprising at least one sealing gasket (1) of polymeric material, the sealing gasket (1) being designed as a fully closed frame, being arranged in an opening of a plate. support (2) and being connected peripherally with the edge delimiting the opening, by conjugation of shapes but removably.

Description

! l 2784731 Technical Field The invention relates to a device

  seal comprising at least one seal made of polymer material and

  to a method for mounting it.

  State of the art When sealing mechanical parts, p. ex. automobile engine valve caps, bipolar fuel cell plates, gearbox housings or hydraulic control unit communication blocks, it is often necessary to very precisely position a joint between flat plates, flanges to make

waterproof and / or in a groove.

  In particular, the fitting of seals having a large length / diameter ratio proves to be very problematic in this case and frequently leads to non-conforming mounting.

  despite considerable manual labor.

  SUMMARY OF THE INVENTION The object of the invention is to develop a sealing device allowing problem-free transport and easy mounting of a seal having a large length / diameter ratio of at least 10: 1 as well as 'a method for mounting it. According to the invention, this object is achieved by a sealing device comprising at least one seal made of polymer material and which is produced as a fully closed frame and peripherally surrounds a support plate and which is connected with the latter by conjugation of forms, but in a removable way. The object of the invention is also achieved by a sealing device comprising at least one sealing in polymer material which is produced as a fully closed frame and which is arranged in an opening of a support plate and is connected peripherally with the edge delimiting the opening, by

  conjugation of forms, but in a removable way.

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  The object of the invention is also achieved by a method of mounting a sealing device according to which the seal and / or the mechanical part to be sealed are provided with an adhesive agent on the sides placed in looking at each other, the seal and the mechanical part being glued to each other and the support plate being detached and removed from the seal

  seal bonded to the mechanical part.

  In the context of the present invention, there is provided a sealing device comprising a seal made of polymer material which is produced as a fully closed frame. The seal surrounds peripherally a support plate and is connected with the latter by conjugation of forms but in a removable manner. There is also provided a sealing device comprising a seal of polymer material which is produced as a fully closed frame, which is arranged in an opening of a support plate and which is connected peripherally with the edge delimiting the opening. , by conjugation of forms but

removably.

  The support plate allows the joint to retain its initial manufacturing form during transport, for example from the place of manufacture to the place of assembly, and during the assembly itself, and

thus preventing deformation.

  The seal may be provided with a groove-shaped cavity open towards the support plate, which preferably corresponds to the peripheral edge of the support plate. During transport, this groove-shaped cavity provides a connection by conjugation of shapes between the seal and the support plate. Unintentional separation of the seal and the plate

support is thus excluded.

  The support plate can be provided with centering holes and / or centering pins which facilitate the exact positioning of the seal on the mechanical part to be sealed.

  during installation of the sealing device.

  For the manufacture of sealing devices at low cost,

  the support plate can be made of plastic.

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  However, in order to ensure good stability of the centering holes and / or of centering pins arranged in the support plate in the case of frequent reuse of said support plate, the centering holes and / or the centering pins, unlike the support plate, can be made of a material

  metal and be placed as inserts in the support plate.

  The mechanical part to be sealed may have a groove made entirely closed for the reception of the seal, the inner limiting wall of said groove having an undercut, in which the seal, once removed from the support plate can snap into place. This has the advantage of being able to mount the seal without adhesive on the mechanical part to be sealed, only the undercut preventing it from moving inside the groove and / or out of the groove. For manufacturing reasons, a seal surrounding the support plate peripherally has shrinkage stresses which appear during the projection of the polymer material on the edge.

  support plate device and subsequent hardening.

  After placing the seal in the groove and removing the support plate, the seal automatically engages in the undercut under the effect of the withdrawal constraints and

  is thus weakly held in its position.

  Before mounting, the seal and / or the mechanical part to be sealed are provided with an adhesive agent on the sides placed opposite one another. Then the seal and the mechanical part are glued to each other and in a last step, the support plate is detached and removed from the seal glued to the mechanical part. Subsequently, the support plate can be reintegrated in the process of

manufacturing and reused.

  The bonding of the seal and the mechanical part prevents the seal from slipping or coming off prematurely from the

mechanical piece.

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  As required, during assembly, the seal can also be fixed in a groove provided for this purpose in the mechanical part to be sealed. The seal, once removed from the support plate, preferably snaps automatically into the undercut. Bonding is superfluous in this case.

Brief description of the drawings

  The object of the invention is explained in more detail below, at

using the drawings.

  Figures 1 to 7 show in a schematic representation respectively a first embodiment of a sealing device comprising a seal in

  polymeric material and a method for mounting.

  Figures 8 and 9 show a second embodiment. Figures 10 and 11 show a detail of the mechanical part

  to be sealed, with a groove having a counter

  bare. Figures 12 and 13 show a third example of

  realization of the sealing device according to the invention.

  Embodiment of the invention Figure 1 shows a cross section of a sealing device comprising a seal 1 made of polymer material. The seal 1 is produced as a fully closed frame and peripherally surrounds a support plate 2. The seal 1 has a groove-shaped cavity 3 towards the inside, which corresponds to the peripheral edge of the support plate 2. The support plate 2 and the seal 1 are interconnected by conjugation of shapes but in a removable manner. The support plate 2 has a centering hole 4 and a pin

  centering 5 and can be made of plastic or metal.

  FIG. 2 shows the first step of the method allowing the mounting of the sealing device described on a mechanical part 6 to be sealed, step in which a groove 7

  disposed in the mechanical part 6 is provided with an adhesive agent.

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  Alternatively, the adhesive agent can be applied to the seal. In a second step of the process, as shown in FIG. 3, the sealing device is centered on the mechanical part 6 using the centering hole 4 and the centering pin 5, so that the seal d seal 1 is placed in

  the grooves 7 provided for this purpose.

  Figure 4 shows the fixing of the seal 1 in the

  grooves 7 using the adhesive agent.

  In FIGS. 5 and 6, the support plate 2 is detached and

  removed from the seal 1 stuck on the mechanical part 6.

  Figures 6 and 7 show the finished mechanical part 6, provided

seal 1.

  Figures 8 and 9 show a second embodiment of the sealing device according to the invention, similar to

  the exemplary embodiment of FIG. 1.

  In this exemplary embodiment, the support plate 2 is made in the form of a ring and is connected with two seals 1.1, 1.2. The first seal 1.1 peripherally surrounds the support plate 2, while the second seal 1.2 is peripherally surrounded by the support plate 2. The two seals 1. 2, 1.2 are each made as a fully closed frame and have on the sides placed opposite one with respect to the other cavities 3 in the form of a groove open in the direction of the support plate 2, by which they are fixed to the support plate 2 by conjugation of

shapes but removably.

  FIG. 9 shows a top view of the sealing device of FIG. 8. We recognize here the annular shape of the

  two seals 1.1, 1.2 and the support plate 2.

  Figures 10 and 11 show a detail of a sealing device according to the invention, the mechanical part 6 to be sealed being itself provided with a groove 7 fully closed for receiving the seal 1. The seal 1 shown here previously wrapped

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  peripherally, under prestressing, a support plate 2. The inner limiting wall 10 of the groove 7 has an undercut 11, in which the seal 1, once removed from the support plate 2, can snap under the effect of withdrawal. Such an embodiment has the advantage of being able to dispense with secondary fixing means, such as an adhesive, to fix the seal 1 inside the groove 7. In this embodiment, the seal d seal 1 is maintained by

  conjugation of shapes inside the groove.

  Figure 11 shows the detail of Figure 10 after blocking

  by conjugation of shapes of the seal 1 in the counter

skin 11.

  Figures 12 and 13 show another embodiment of a sealing device. FIG. 12 shows a section AA in FIG. 13. The seal 1 is produced as a whole in one piece, cavities 23 being provided at the level of two front faces placed opposite one with respect to the other, which are filled by supports 13 during assembly. The supports 13 have a function similar to that of the support plate 2, the supports and the sealing lips enveloping the supports being

  connected by conjugation of forms but in a removable way.

  Figure 13 shows a top view of the device

Figure 12.

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Claims (11)

  1. Sealing device comprising at least one seal (1) made of polymer material, characterized in that the seal (1) is produced as a fully closed frame and peripherally surrounds a support plate (2) and is connected with   this one by conjugation of forms but in a removable way.   2. Sealing device comprising at least one seal (1) made of polymer material, characterized in that the seal (1) is produced as a fully closed frame, in that it is arranged in an opening (8) of a support plate (2) and in that it is connected peripherally with the edge (9) delimiting the opening (8), by conjugation of forms but in a removable manner.   3. Sealing device according to one of claims 1 or   2, characterized in that the seal (1) is provided with a groove-shaped cavity (3), open in the direction of the plate support (2).   4. Sealing device according to claim 3, characterized in that the groove-shaped cavity (3) corresponds   substantially at the peripheral edge of the support plate (2).   5. Sealing device according to one of claims 1 to   4, characterized in that the support plate (2) is provided with holes   centering (4) and / or centering pins (5).   6. Sealing device according to one of claims 1 to   5, characterized in that the support plate (2) is made of plastic. 7. Sealing device according to claim 6, characterized in that the support plate (2) has centering holes (4)   and / or centering pins (5) made of metallic material.   8. Sealing device according to one of claims 1 to   7, characterized in that the mechanical part (6) to be sealed has a fully closed groove (7) for receiving the seal (1) and in that the inner limiting wall (10) of the groove ( 7) has an undercut (11), in 8 2784731   which the seal (1), once removed from the plate support (2) can engage.   9. Method of mounting a sealing device according to   one of claims 1 to 8, characterized in that the seal   seal (1) and / or the mechanical part (6) to be sealed are provided with an adhesive agent on the sides placed opposite one another, in that the seal ( 1) and the mechanical part (6) are glued to each other and in that the support plate (2) is detached and removed from the seal (1) glued on the mechanical part (6).   10. Method according to claim 9, characterized in that the seal (1) is fixed in a groove (7) provided for this   effect of the mechanical part (6) to be sealed.   11. Method according to claim 9 or 10, characterized in that the seal (1), once removed from the support plate   (2), automatically engages in the undercut (11).