EP0570269A1 - Sealing strip for doors or windows made of PVC or the like and doors or windows provided with said strip - Google Patents

Abstract

Sealing strip (G') for doors or windows made of PVC or similar weldable material, comprising at least one flexible operational part (30a) intended to cooperate in a leakproofing manner with a glazing element, and a lug (T') for fitting in a profile made of PVC or similar material. The lug (T') is made of a rigid or semi-rigid material and comprises at least one zone (40', 41') having a high coefficient of friction. <IMAGE>

Description

The invention relates to a seal for joinery made of PVC or similar material as well as products incorporating such a seal, such as windows, French windows, etc. with single or multiple glazing (s).

The rationalization of manufacturing is one of the fundamental objectives to which the industrialists are attached in the building industry, while the suppliers of products and / or materials used for these manufacturing wish to facilitate the development, as much as doing can, in particular to reduce the cost but also to guarantee a constant quality. With regard to the closing elements of buildings such as doors, windows, window units, French windows or the like, it has already been proposed, for a long time, to apply PVC profiles and to associate said profiles with seals or gaskets of rubber or similar material, for example as described in DE-Gbm-87 14637 where a gasket comprising a flexible operating part is mounted in a groove or groove of a PVC profile by means of '' a heel with an "open" outline of the lining. In the known technique of PVC joinery, sections of sections are first assembled, more generally by welding, which are then manually trimmed and in return for the seals or seals, then suitable hardware elements; the mere installation of seals or seals can occupy several work stations in a large manufacturing unit.

The problem therefore arises of providing gaskets or seals for building closing elements whose manufacture is simple and whose easy assembly requires little labor for its realization.

It is, precisely, an object of the invention to provide a seal for joinery in PVC or similar material which makes it possible to obtain this result.

It is, again, an object of the invention to provide such a seal, the manufacture of which does not require complex tooling, on the one hand, and which, on the other hand, allows a considerable reduction in the costs of manufacturing by eliminating, in particular, the operation of manual assembly of seals and PVC profiles of closing elements such as doors, windows, window units, French windows or the like.

A seal for joinery in PVC or similar weldable material comprising at least one flexible operating part intended to cooperate in sealing with a glazing and a cross section heel with an "open" outline for mounting in a profile of PVC or similar material which has a groove or groove for this purpose is characterized, according to the invention, in that said heel, which comprises at least one zone having a high coefficient of friction, is made of a rigid or semi-rigid material and is intended to be placed in the PVC profile or similar material which it equips with its "open" part opposite the bottom of said groove or groove.

The heel for mounting a seal according to the invention is thus clearly distinguished, by its structure and its assembly, from the heels of the known seals which are made of flexible material and whose assembly is carried out with the open part facing the back of the throat, as in DE-30 23 984 for example.

A gasket according to the invention can be installed in a PVC profile or similar material intended to constitute a joinery from the extrusion of said profile, and before assembling sections of said profile to constitute a frame or chassis, most simply by forcing the heel into a groove in the profile, with the "open" part opposite the bottom of the groove, using a roller device, or the like, the association of the seal with the profile being advantageously carried out in "masked time" on the one hand, and automatically, on the other hand, with as a consequence a considerable reduction in labor costs and a better and more homogeneous manufacturing quality than that of previously known products.

When, in addition, the seal according to the invention is delivered in great length, on a reel or reel, it can be placed on the profile in PVC or similar material without modifying the manufacturing conditions of the latter and in taking into account the extrusion speed of the profile so that the reel or reel change takes place only after completion of a long length of profile and, thus, with a low expenditure of labor.

The heel made of rigid or semi-rigid material that includes the seal according to the invention makes it easier to cut the lengths of seals unwound from the reel or reel on which it is delivered, on the one hand, avoid any elongation of said lining during installation, on the other hand, while retaining a certain elasticity in the heel, giving it a spring effect favorable to its retention on the profile after the positioning operation.

The invention also proposes that the heel of the seal is made of a material with good sliding properties, which allows the heel to be placed in the profile without having to apply lubricants generally used in the prior art or materials such as talc or silicone-based and which are opposed to obtaining satisfactory weld assemblies while the zone with a high coefficient of friction is opposed to relative sliding of the heel and of the profile after introduction of the heel into the latter using the roller device.

In an advantageous embodiment, the seal according to the invention is produced by coextrusion of different materials to obtain the desired characteristics indicated above of flexibility, rigidity or semi-rigidity, good sliding properties for certain parts. of the heel and of high coefficient of friction for certain zones of said heel and, in a preferred embodiment, the invention provides for using plastics and materials of the TPE type (thermoplastic elastomers) as the constituent materials of the lining, or in general, any material having a plastic phase and an elastic phase.

In an alternative embodiment, all the materials used for the seal according to the invention are chosen from materials having a plastic phase and an elastic phase.

• la figure 1 est une vue schématique en coupe d'une menuiserie en PVC selon la technique connue ;
• la figure 2 est une vue en coupe d'une garniture d'étanchéité selon l'invention pour une première forme de réalisation ;
• la figure 3 est une vue analogue à celle de la figure 2 pour une autre réalisation.

Other characteristics and advantages of the invention will appear from the description which follows, given by way of example and with reference to the appended drawing, in which:

• Figure 1 is a schematic sectional view of a PVC joinery according to the known technique;
• Figure 2 is a sectional view of a seal according to the invention for a first embodiment;
• Figure 3 is a view similar to that of Figure 2 for another embodiment.

Reference is first made to FIG. 1 which shows, to illustrate the state of the art, a double glazing 10 with windows 11 and 12 held at a certain distance from each other by an element 13, the sealing between profiles of PVC or similar material 14 and 15 which form the frame or frame of the glazing and the windows 11 and 12 being obtained by seals 16 and 17 made of a material such as rubber mounted and fixed in the profiles to which they are associated by their tubular heel 18 and 19, respectively. Whether the glazing is double, as has just been described, or simple, it is generally produced by first assembling sections of sections 14 and 15 by welding to form the frame or frame which is then fitted with the seals 16 and 17 placed manually by their tubular heel in grooves or grooves such as 20 and 21 in extruded PVC profiles, said heels being generally partially coated with talc, or coated with fatty products with a high coefficient of sliding, such as silicones for facilitate their penetration into said grooves or grooves.

• . une partie active ou opératoire 30, à lèvres d'étanchéité 31 et 32 destinées à coopérer avec une glace d'une menuiserie en PVC ou matériau analogue ; et
• . un talon T dont la section droite, -c'est-à-dire en coupe par un plan transversal-, est un canal "ouvert", limité par des branches sensiblement planes 33 et 34 dont les extrémités les plus distantes de la partie 30 sont reliées par les ailes 35 et 36 formant un dièdre à arête 37 située dans un plan P qui est un plan de symétrie du talon aussi bien dans la condition montrée en trait plein, -et qui est celle de montage dans le profilé en PVC-, que celle montrée en traits pointillés, -et qui est celle de la sortie de filière d'extrusion de ladite garniture G-.

To overcome the difficulties of this known technique, the invention proposes a seal, G, FIG. 2, comprising:

• . an active or operating part 30, with sealing lips 31 and 32 intended to cooperate with a window of a PVC or similar material joinery; and
• . a heel T the cross section of which, that is to say in section through a transverse plane, is an "open" channel, limited by substantially planar branches 33 and 34, the ends of which are the most distant from the part 30 are connected by the wings 35 and 36 forming a dihedral with an edge 37 situated in a plane P which is a plane of symmetry of the heel as well in the condition shown in solid line, -and which is that of mounting in the PVC profile, than that shown in dotted lines, -and which is that of the extrusion die outlet of said gasket G-.

This is advantageously produced by coextrusion of plastics and / or materials of the thermoplastic elastomer (TPE) type or generally of materials having a plastic phase and an elastic phase but the characteristics of which are chosen according to the part of the filling they form. Thus, the operating part 30 is made of a heat-weldable material with good flexibility characteristics, to ensure ease of manufacture and sealing, while the heel T is made mainly of a rigid or semi-rigid material, with good properties. sliding, with on the external faces 38 and 39 of the branches 33, 34 (and partly on the junction zone of the said branches with the wings 35 and 36) two coatings 40 and 41 shaped to provide spouts 45 and 46 and which are in a material with a high coefficient of friction, opposing the sliding of the heel relative to the groove or groove in which it has been introduced. The use for the heel T of a rigid or semi-rigid material makes it possible to facilitate its cutting to length and its installation in the PVC profile which it is intended to equip, using a roller device ( not shown which brings the edge 37 in the vicinity of the bottom of the groove or groove of the profile) while avoiding a risk of untimely elongation of the lining, on the one hand, and by providing, on the other hand, an elastic effect spring when passing from the condition shown in solid line to that shown in solid line after fitting the packing.

In the embodiment shown in Figure 3, the seal G 'is provided for its mounting in a groove or groove 20 or 21 of an extruded profile of PVC or similar material, 14 or 15. It comprises, as in the embodiment described with reference to FIG. 2, a first active or operating part 30 ' with sealing lip 31 'and a second active or operating part 30 a with sealing lip 30' a . Its heel T ', substantially of the same cross section, "open", as that of the heel T of the previous embodiment, is thus limited by substantially planar branches 33' and 34 ', connected by wings 35' and 36 'forming a dihedral with an edge 37 'with, at the junction of the wall 33' and the wing 35 ', as well as that of the wall 34' and the wing 36 ', nozzles 45' and 46 '. The external faces 38 'and 39' of the arms 33 'and 34' are also each provided with a coating 40 'and 41', respectively, similar to the coatings 40 and 41 of the previous embodiment and the materials used for the lining. G 'are of the same type as those used for the manufacture of the lining G, namely plastics and / or materials of the thermoplastic elastomer (TPE) type or else materials having a plastic phase and an elastic phase with good flexibility characteristics for the operating part 30 ′ on the other hand, of the rigid or semi-rigid type for the heel T ′, the coverings 40 ′ and 41 ′ being here also made of a material with a high coefficient of friction opposing the sliding of the heel T 'after introduction of the latter into the groove or groove 20 or 21 so that the edge 37' is in the vicinity of the bottom of the groove or groove 20, 21.

Whatever the embodiment, the invention provides for manufacturing the gasket which it offers in great length, using a die without core, -accounting for the straight section with "open" outline "from her heel-, and deliver her to users on reels or reels with a capacity of 500 to 600 m, for example, to allow such lining to be associated with extruded PVC profiles as soon as they are extruded, so that the fitting of the lining can be carried out automatically, easily, using a roller device or the like and in "masked time", the absence of fatty substances (such as silicones) or talc for fitting the lining in the profile with which it is associated allowing then to implement the usual welding machines to obtain the sealing continuity in the angles simultaneously with the manufacture of the glazing frames or frames using these PVC profiles provided with their sealing gasket.

The invention is not limited, of course, to the embodiments which have just been described, nor to joinery in PVC or similar material. It finds application, on the contrary, to produce seals whose operating part is different from that described and illustrated with reference to Figures 2 and 3, but also to equip joinery in weldable materials other than PVC.

Claims (5)

Sealing gasket (G, G ') for PVC joinery or similar weldable material comprising at least one flexible operating part (30, 30', 30a) intended to cooperate in sealing with a glazing and a heel (T, T ') with a cross section with an "open" outline for mounting in a profile of PVC or similar material which has a groove or groove (20, 21) for this purpose, characterized in that the heel (T, T '), which comprises at at least one zone (40, 41; 40 ', 41') having a high coefficient of friction is made of a rigid or semi-rigid material and is intended to be placed in the profile of PVC or similar material which it equips with its part "open" opposite the bottom of said groove or groove (20, 21). Seal according to claim 1, characterized in that it is produced by coextrusion of plastic material (s) and / or of TPE type materials (thermoplastic elastomers). Seal according to claim 1 or claim 2, characterized in that it is produced by coextrusion of materials chosen from those having a plastic phase and an elastic phase. Use of a packing according to any one of the preceding claims for the manufacture of PVC or similar joinery, characterized in that the packing is delivered to users in great length on reels or reels with a capacity of 6 to 600 m, approximately. PVC joinery or similar weldable material comprising a gasket according to any one of claims 1 to 3.

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