WO2009053583A2

WO2009053583A2 - Method and unit for priming glass panes by means of pad printing, glass pane(s) having a priming layer deposited thereon by means of pad printing and use of a pad printing device

Info

Publication number: WO2009053583A2
Application number: PCT/FR2008/051781
Authority: WO
Inventors: Patrick Le Lievre; Christophe Kleo
Original assignee: Saint-Gobain Glass France
Priority date: 2007-10-02
Filing date: 2008-10-02
Publication date: 2009-04-30
Also published as: FR2921653A1; WO2009053583A3; FR2921652B1; FR2921652A1

Abstract

The invention relates to a method and unit for the production of a glass pane (1), in particular a curved pane, including at least one joint portion and/or at least one pane accessory, said joint portion and/or said accessory being affixed to at least one surface of the pane (1). The method includes a preparation operation including a priming step in which a priming fluid is applied to a surface of the pane or a surface of the joint portion and/or the accessory in order to form a priming layer intended to be in direct contact with the joint portion and/or the accessory. The invention is characterised in that the priming step is performed by means of pad printing, whereby the aforementioned fluid is disposed on a pad (5) and the pad (5) is subsequently applied to the surface of the pane or the surface of the joint portion and/or the accessory.

Description

METHOD AND INSTALLATION OF TAMPOGRAP H I E GLAZING PRIMING,

GLAZING (S) WITH PRINTING LAYER DEPOSITED BY PAD AND PRINTING

USE OF A PADING DEVICE

The invention relates to the field of priming glazing and in particular to the field of priming glazing for vehicles.

When a glazing must be provided with a portion of seal and / or an accessory, so that the material of the seal or the accessory adheres correctly to the glazing a priming layer is deposited either on a surface of the glazing, or on a surface of the joint portion or the accessory.

The surfaces on the one hand of the glazing and on the other hand of the seal or the accessory are not compatible, especially when this seal or this accessory is made of plastic, so that the material of the seal or the accessory adheres correctly to the glazing, the priming layer will thus promote this adhesion.

The priming operation thus consists in depositing a layer of priming fluid either on the surface of the glazing that will receive the portion of the gasket or the accessory or on the surface of the portion of the gasket or the accessory to be arranged. against the adjacent surface of the glazing. An activator or an accelerator or a heat input is also sometimes used to activate or accelerate this adhesion or a layer of adhesive is interposed between the priming layer deposited on a surface of the joint portion or the accessory and the adjacent glazing surface.

Currently, the priming fluid is applied using a felt soaked in priming fluid by impregnation either manually by a human operator using a manual felt-holder, or automatically by means of a robot provided with a support receiving the felt soaked with priming fluid. In the first case, the felt has a width identical to that of the surface to be provided with priming fluid. The felt is positioned on a felt holder located at the end of a flexible bottle containing the priming fluid. A slight pressure on the walls of the bottle causes the transfer of the priming fluid to the felt and the priming fluid transits by capillarity through the felt. The felt holder further comprises a support flange serving as a guide when passing on the periphery of the glazing. If the width of the surface to be primer is not constant on the glazing or glazing to the other, it is necessary to have several felt holders, the width of the felt being adapted to the width to be primer. It is also possible to have a removal template. This tool allows to receive the glass, to hold it in place and to primer only the necessary surface.

In this first case, the thickness of the layer is not identical over the entire area concerned and in particular over its width and is not the same from one glazing to another and there is a risk that the priming layer is too thin, or even absent, in certain parts of the same glazing or on certain glazings and / or that the priming layer is too thick in other parts of the same window or on other windows . If this excess priming is visible when the glazing is equipped with the joint portion, it is necessary to perform a recovery work, but this increases the risk of damage to the surface and increases the time and cost required for manufacturing.

In the second case, either a mobile end of the robot is provided with the support receiving the felt soaked with priming fluid and the glazing is fixed, or the support receiving the felt soaked with priming fluid is fixed and it is the glazing which is mobile.

In this second case, the priming layer may be of constant thickness throughout the area concerned, but its width is small, limited by the width of the support receiving the felt. It is possible to consider passing several times on surfaces side by side, but such an operation increases the time as well as the cost necessary for manufacture. Moreover, the programming of the path of the felt support or the glazing is a complex operation because it is necessary to maintain a regular contact in the changes of direction and this, despite the irregularities of curves if the glazing is curved.

The present invention intends to overcome the drawbacks of the prior art by proposing a method and an installation for applying a priming fluid to a glazing unit, in particular a curved (that is to say non-planar) glazing or applying a priming fluid to a joint portion or an accessory, such that the priming layer has a constant average thickness.

In addition, the present invention is intended to improve the adhesion obtained by virtue of the priming layer by making it possible to produce a layer in relief, thus increasing its contact surface with the material of the joint portion or the accessory by to a layer of strictly constant or substantially constant thickness.

Furthermore, the present invention aims to increase the accuracy of removal, to reduce the recovery end of the manufacturing process and intends to allow greater flexibility in sizing the deposited widths.

The object of the invention is therefore, in its broadest sense, a method of manufacturing a glazing unit, in particular a curved glazing unit, comprising at least one joint portion and / or at least one glazing accessory, said portion of seal and / or said accessory adhering to at least one surface (main face (s) and / or edge, optionally covered (e) an opaque layer) of said glazing and said method comprising a preparation operation of the glazing, the edge portion or the accessory before the seal portion and / or the accessory are brought into contact against the said glazing surface, the said preparation operation comprising a priming step consisting in applying a fluid of primage on a surface glazing or on a surface of the joint portion and / or the accessory to form a priming layer which will be in direct contact (without the interposition of another layer) with said joint portion and / or said accessory, this method being characterized in that said priming step is performed by pad printing by placing said priming fluid on a pad and then applying said pad on said glazing surface or said surface of the seal portion and / or the accessory.

Thus, during the application of the buffer comprising the priming fluid on the surface to be provided with this fluid (surface to be primer), all the priming fluid provided by the buffer is deposited on this surface and after this application, it There is (so to speak) no more priming fluid on the buffer.

The buffer is not porous, it serves as a temporary support for the displacement of the amount of priming fluid necessary for the realization of the priming layer.

By bringing the joint portion and / or the accessory into contact with the surface of the glazing, it is of course necessary to understand an indirect contact since the priming layer is interposed between, on the one hand, the surface of the glazing possibly covered. an opaque layer and / or optionally a glue layer and secondly the seal portion and / or the accessory. This priming layer is in direct contact with the surface of the glazing or, where appropriate, with the opaque layer, or even with a layer of adhesive on the surface of the glazing or on the opaque layer, and on the other hand the joint portion and / or the accessory. By application within the meaning of the present invention is meant that the buffer undergoes a translation movement when it is applied against the surface to be primer.

This application can also be operated indirectly by subjecting the glazing or the portion of seal or the accessory a translational movement to apply the surface to prime against the buffer. It is thus possible to form a pattern, in relief that is to say in three dimensions, in the priming layer, this pattern being reproduced preferably several times, so that when this pattern is inscribed in a circle of diameter equal to 10 mm or a square of side equal to 10 mm, the pattern does not occupy the entire surface of this circle or square. This relief makes it possible to increase the area of contact with the elements on each side of the priming layer.

The priming layer is thus perforated voluntarily and in a way that reproduces from one glazing to the other or from a portion of seal or accessory to the other, especially within a series identical glazing.

The application of the priming fluid to the buffer is preferably carried out after having previously pressed said buffer against a cliché coated with priming fluid: this is the step of transferring the priming fluid from the image to the buffer; All the priming fluid previously contained in the plate and necessary for the production of the priming layer is transferred to the buffer.

The coating of the priming fluid plate, during which the quantity necessary for the production of a priming layer is deposited in the plate, is preferably carried out during the application of the pad on the surface of the glass to be primed. or on the prime surface of the joint portion and / or accessory, to save time.

In particular, the coating of the plate can be carried out by passing on a reservoir containing priming fluid. Preferably, after said preparation operation: said portion of seal and / or said accessory is formed by extrusion of plastic material on said surface of the glazing unit or said portion of seal and / or said accessory is formed by encapsulation of plastic material on said glazing surface or - said portion of seal and / or said accessory is applied, preformed, on said surface of the glazing and glued to said surface, possibly by interposing a layer of adhesive between firstly the priming layer of the joint portion or the accessory and secondly the glazing surface.

It is also possible to apply a heat input to activate or increase the effect of the priming layer.

Furthermore, it is possible that during said preparation operation said buffer is applied several times against the surface of the glazing, at different locations, to form several portions of priming layer in different places. It is furthermore possible that during said preparation operation said pad is applied several times, each time against a surface of a different portion of joint and / or a surface of a different accessory, in order to make it possible to provide the glazing with several portions of seal and / or several accessories. A glazing accessory in the sense of the invention may consist generally of any element, in any material, positioned by extrusion, encapsulation or gluing against a glazing and requiring a layer of adhesion promotion to cooperate properly with the surface of the glazing possibly coated with a layer of glue. This accessory may consist in particular of a base of / for:

positioning and / or fixing pin,

- mirror, and in particular rear view mirror,

- sensor (rain, brightness, ...),

- Element allowing the mobility of the glazing: movable side glazing clip ("holder" in English), hinge and in particular rear quarter hinge, rail and in particular sunroof rail, ...

The invention also relates to the manufacturing facility for implementing the manufacturing method according to the invention. This installation for manufacturing a glazing unit, in particular a curved glazing unit, comprising at least one joint portion and / or at least one glazing accessory, said portion of seal and / or said accessory adhering to at least one surface of said glazing, comprises at least one device for the preparation of said glazing before contacting the seal portion and / or the accessory against said surface of the glazing unit, said device comprising means for operating the priming and making it possible to apply a priming fluid on a surface of the glazing unit or on a surface of the joint portion and / or the accessory to form a priming layer which will be in direct contact with said joint portion and / or said accessory.

The device for the preparation of said glazing is automatic, that is to say that it is managed by a PLC.

The installation is remarkable in that said device comprises at least one movable buffer between an application position in which it is in contact with the surface of the glazing or with the surface of the joint portion and / or the accessory and a recharging position in which it is in contact, direct or indirect, with a reserve of priming fluid.

In the position of application the movable pad is not in contact with the supply of priming fluid and in the recharging position the movable pad is not in contact with the surface of the glazing or the surface of the joint portion and / or accessory. In a variant, in the recharging position, the indirect contact between the buffer and the reserve of priming fluid is operated via a snapshot.

This plate preferably comprises a perforated grid and which has a pattern, reproduced preferably several times, so that when this pattern is inscribed in a circle C of diameter equal to 10 mm or a square of side equal to 10 mm the pattern does not occupy the entire surface of this circle or square.

This aperture makes it possible in particular to prevent the priming fluid from being chased beyond the edges of the stamp when the latter is pressed against the plate. This grid preferably comprises a plurality of pads arranged on a bottom, the pads having a circular, oval or polygonal section, this section being constant or narrowing in a direction opposite to the bottom, and the pads being optionally open to their end opposite the bottom.

These pads preferably have a diameter of between 1 mm and 10 mm including these values and a height h between 20 microns and 2 mm including these values.

In a particular variant, at least two pads of the plate are joined by means of a bridge. The junction between the pads then provides an additional surface of contact with the pad.

The pad preferably has a shape similar in two or even three dimensions to that of the surface of the glazing or the surface of the joint portion and / or the accessory. The plate preferably has a shape similar in two or even three dimensions to that of the glazing surface or the surface of the joint portion and / or the accessory.

The priming layer preferably has a similar shape in two, or even three dimensions, to that of said shot. The priming device also preferably comprises a coating system for coating the cliché with priming fluid.

This coating system preferably comprises a movable reservoir on the surface of a sheet supporting the cliche and in contact with this surface via a ceramic seal or metal or metal alloy. When the seal is made of metal or metal alloy, it has preferably undergone a surface treatment to harden it.

The plate can be made in particular by etching, and in particular by etching, the strip that supports it.

The invention also relates to glazing obtained by implementing the manufacturing method according to the invention. This glazing, in particular curved, comprises at least a portion of seal and / or at least one glazing accessory, said portion of seal and / or said accessory adhering to at least one surface of said glazing and comprises between said surface and said portion of seal and / or said accessory a priming layer in direct contact with said portion of seal and / or said accessory. This glazing is characterized in that said priming layer is perforated and has a pattern, reproduced preferably several times, so that when this pattern is inscribed in a circle C of diameter equal to 10 mm or a square of side equal to 10 mm, the pattern does not occupy the entire surface of this circle or square.

Said priming layer preferably comprises a plurality of pads, the pads having a circular, oval or polygonal section, this section being constant or narrowing in a direction opposite to the surface on which the priming layer has been deposited and the studs possibly being open at their opposite end to this surface.

Said pads preferably have a diameter of between 1 mm and 10 mm including these values and a height of between 10 microns and 1 mm.

At least two studs may be connected by a bridge, that is to say a rectilinear or curved link to further increase the contact surface between the priming layer and the material of the joint portion or the accessory to which she adheres.

Said pattern of the priming layer is preferably inscribed in a periodic mesh. The priming layer is preferably recessed from 0.5 to 10 mm (and generally has a shrinkage of between 1 and 3 mm) from the edge of the glazing or the edge of the joint portion or the accessory on which he, or on which it, has been applied. Thus, the primary does not overflow and is not visible once the seal portion or accessory installed against the glazing. The glazing may further comprise between said surface and said priming layer an opaque layer and / or a layer of glue. The invention also relates to a set of glazing according to the invention, the glazing of this set comprising the same priming layer having the same pattern. Indeed, by the implementation of the invention for the realization of a series of glazing, it is possible to see that all the panes of the series have the same priming layer in the same place, the pattern of each layer being oriented in space in the same way for each glazing.

The invention finally relates to the use of a pad printing device, and in particular an automatic device, that is to say, managed by an automaton, for performing at least one step of priming a surface of a glazing or a surface of a joint portion and / or glazing accessory, in particular for a curved glazing, for applying a priming layer on the surface of said glazing which will be in direct contact with at least one joint portion and / or at least one accessory or to apply a priming layer on the surface of the joint portion and / or the accessory and allow to adhere this portion of seal and / or this accessory to said surface of the glazing, with a priming fluid on a pad and then applying said pad to said glazing surface or to the surface of the seal portion and / or the accessory.

The details and advantageous characteristics of the invention emerge from the following nonlimiting examples, illustrated with the aid of the attached figures:

FIG. 1 illustrates a vertical sectional view of a vehicle windshield installed in a vehicle body bonnet, the windshield being equipped with a peripheral seal and an interior mirror base, the cut being performed at this base;

FIG. 2 illustrates a perspective view of an exemplary embodiment of a priming device according to the invention; FIG. 3 illustrates a partial rear cross-sectional view of the priming device of FIG. 2;

FIGS. 4 to 8 diagrammatically illustrate the operating cycle of an exemplary priming device according to the invention implementing the priming method according to the invention;

FIG. 9 illustrates a view in section and in perspective of an example of extrusion of a seal on a glazing unit comprising a priming layer according to the invention; FIG. 10 illustrates a sectional view of an example of encapsulation of a seal on a glazing unit comprising a priming layer according to the invention;

FIG. 11 illustrates a perspective view of a pattern of a cliche grid; FIGS. 12 and 13 illustrate a first exemplary embodiment of a pattern of a priming layer according to the invention respectively in plan view and in perspective view, said layer having been obtained by the implementation of the grid illustrated in Figure 11;

FIG. 14 illustrates a second exemplary embodiment of a pattern of a priming layer according to the invention, seen from above;

FIG. 15 illustrates a third exemplary embodiment of a pattern of a priming layer according to the invention, seen from above; and

- Figure 16 illustrates a section of a glazing according to the invention which has undergone an extrusion operation of a joint portion, this joint portion having been removed and revealing the priming layer.

In these figures, the proportions between the thicknesses of the different elements and of the different layers are not rigorously respected in order to facilitate their reading. In the context of the manufacturing method according to the invention a glazing unit (1), such as the curved windshield of a motor vehicle illustrated in FIG. 1, is provided with a portion of seal (2) formed of a plastics material. during a training operation or application of the seal portion on the glazing which will be detailed later.

The glazing unit (1) is also provided with an accessory (2 ') of glazing constituted here by a plastic base to allow attachment by clipping of an interior rearview mirror, but this base could also be a base forming part of the mirror. This base could also be in another material than a plastic material and in particular could be metal or metal alloy.

This glazing is thus intended to allow closing a bay formed in a vehicle body (7).

Both the joint portion and the accessory must adhere respectively to at least one surface (10, 10 ') of said glazing (1) which is not a complete face of the glazing, but a portion of the face.

The surface (10) is located on one or both main faces of the glazing, that is to say on the inner face (11) and / or on the outer face (12) of the glazing, as well as possibly on the edge (13) of the glazing. This surface is generally for vehicle glazing near the peripheral edge of the glazing and often occupies the entire peripheral edge of the glazing. In Figure 1, the surface (10) is located only on the edge of the inner face (11). The surface (10 ') is also located on the inner face (11) of the glazing. Often, the edge of the glazing is provided with an opaque layer (14) which makes it possible to mask the inner portion of the joint portion of the external view and to protect this portion of solar radiation joint and in particular the action of ultraviolet rays.

When this opaque layer is present, it can be considered that the glazing surface to which the seal portion and / or the accessory must adhere integrates this opaque surface. For the intended application, the glazing (1) can be a monolithic glazing or laminated glazing.

The joint portion (2) illustrated here is a peripheral portion, formed by extrusion over the entire peripheral edge of the inner face (11) of the glazing, on the surface (10) which is itself present on the entire peripheral edge.

This joint portion (2) has, as can be seen in more detail in Figure 9, a base (21) disposed on the inner face of the glazing, two wings (22, 23) extending towards the the interior of the vehicle, these wings being intended to allow to contain a bead of adhesive (24) which will stick the seal against the portion of bodywork (7) adjacent. The joint portion further has a lip (25) extending beyond the edge (13) of the glazing and coming into contact with the body by turning to the outside of the vehicle. The joint portion further has a wire (26) facilitating the cutting of the joint portion to allow removal of the glazing of the body, in particular to change it if it is broken.

The forming operation or application of the joint portion (2) and / or the accessory (2 ') on the glazing will be detailed below. However, before this step, the method of manufacturing the glazing comprises an operation of preparing the glazing before bringing said plastic into contact with said surface (10, 10 ') to which it must adhere.

This preparation operation comprises a priming step of applying a priming fluid (4) on said surface (10, 10 ') in the form of a priming layer (40, 40'). In the context of the example of Figure 1, the layer (40) is deposited directly on the opaque layer (14).

According to the invention, the priming step is performed by pad printing, using a pad printing device (3) of the type illustrated in FIG. 2. During the priming step, the priming fluid ( 4) is arranged on a pad (5) and then the pad (5) is applied to said surface (10, 10 ') which must be covered with priming fluid. This makes it possible to form a priming layer (40, 40 ') having a pattern.

The device (3) is automatic, that is to say is managed by a controller and a touch screen (30) management and control to program the controller and control its proper operation.

This automaton allows an optimization of the movements and the time required for each movement to allow to deposit the priming fluid as glazed as possible after impregnation of the buffer.

It comprises means for operating the priming and making it possible to apply a priming fluid (4) on said surface (10, 10 ') to form a priming layer (40, 40') in direct contact with said joint portion (2 ) and / or with said accessory (2 ').

These means consist of a buffer (5) movable between an application position in which it is in contact with said surface (10, 10 ') and a recharging position in which it is in contact with a reserve (34) of priming fluid (4).

The position of application, carried out in the foreground is visible in Figure 2, while the recharging position, operated in the background is not visible in Figure 2. In the charging position the contact between the buffer (5 ) and the reserve of priming fluid (4) is an indirect contact, operated via a plate (6).

The movements of the buffer (5) are made by means of a set of pneumatic cylinders, or preferably by means of a set of electric motors and transmission means in order to increase the precision of the displacements and the time required for these displacements, this set being managed and controlled by the PLC.

The buffer (5) has a bottom face which has a very close configuration in two, and preferably here in three dimensions of that of the surface (10). The shape of the stamp and that of the glazing have been exaggerated here to better illustrate their resemblance. Either the pad (5) is entirely of antistatic silicone, or it is only its underside which is made of antistatic silicone.

The use of an antistatic silicone makes it possible to promote the temporary adhesion of the priming fluid and to avoid the formation of primer wires by a phenomenon of static electricity.

The device (3) thus comprises, in addition to the buffer (5) and mechanisms for moving it between its two positions, a support (31) to accommodate the glazing (1) and a base (32) on which is disposed a strip (60) on the surface of which the cliche (6) is made. The strip also rests on a plate fixed to the device (3) in a removable manner, in order to be able to change the strip when the configuration of the glazing changes.

The glazing (1) thus rests by its outer face (12) on the support (31) so that the inner face (1 1), exposed upwards, is free. The device (3) further comprises a cleaning system of the underside of the buffer (5) through a web (50) cleaning. Regularly, the buffer (5) is applied against a web stretched between a roller (51) distributor and a receiving roller (51 ') and against a bearing surface (52), to deposit on the veil the surplus fluid of priming (4) which is on its surface.

The plate (6) is a relief pattern made in a thick metal sheet, called "strip (60)", this sheet being etched by chemical etching to form a background and a pattern in relief relative to this background. Engraving can be likened to a grid, as explained below. The etching is performed in hollow relative to the surface (here the upper surface) of the strip (60).

Figures 4 to 8 schematically illustrate an example of different phases for performing the priming step using the device (3).

Before the cycle begins, priming fluid (4) is disposed in a reservoir (34), illustrated in FIG. 3. This reservoir (34) consists of a circular section tube having a lower bottom open towards the FOLDER (60) which accommodates the plate (6) and a top opening closed by means of a cover (36), in order to prevent the priming fluid from evaporating or at least its solvent evaporates.

The lower part of the tank (34) is provided with a circular seal (35) of the same diameter as the circular tube of the tank, this seal here being a ceramic seal. The reservoir (34) thus rests on the strip (60) via this seal (35).

This seal (35) moves the reservoir (34) to the surface of the strip (60), without lifting the reservoir and ensures a sealing contact between the tank wall and the surface of the strip (60) during this movement.

This movement is effected by means of a sliding system (37) which supports the reservoir (34) and which slides on horizontal rails parallel to the surface of the strip (60).

The width of the plate (6) is preferably smaller than the diameter of the tank (34), but the length of the plate (6) may be greater than the diameter of the tank (34).

The operating cycle of the device (3) can be broken down into essentially five successive phases: - 1 ^st phase, illustrated in Figure 4: the buffer (5) is above the plate (6) soaked or fluid coating priming (4).

T phase, illustrated in Figure 5: the buffer (5) is lowered to the plate (6) and is pressed against the plate so that all the priming fluid is transferred against the lower surface of the buffer, by capillarity , respecting the shape of the pattern of the shot.

- ^3rd phase, illustrated in Figure 6: the buffer (5) is raised above the plate (6) and the lower surface of the pad takes all the priming fluid (4) which was present on the plate; There is no more or almost no more priming fluid (4) on the plate (6); during this time, the glazing unit (1) is deposited on the support (31). - 4 ^th phase, illustrated in Figure 7: the buffer (5) is pressed on the glazing (1) and causes deposition of the priming fluid (4) on the surface (10, 10 ') to form the layer of priming (40, 40 '); during this time, the reservoir (34) is passed over the plate (6) so that the priming fluid is deposited in the etching.

- 5 ^th phase, illustrated in Figure 8: the buffer (5) is released from the surface of the glazing (1) and a priming layer (40, 40 ') having a pattern is present on the surface (10, 10'); There is no more, or almost no more, priming fluid (4) on the buffer (5); the glazing (1) can be removed from the support (31).

If the glazing still has at least one other independent primer surface or if the surface (10, 10 ') is too large in relation to the size of the stamp (5), it is possible not to remove the glazing during the ^5th phase and begin the cycle at least once by pressing the pad (5) in another location on the glazing (1) during the ^4th cycle of the following phase.

As part of the cycle, as soon as the 5 ^th phase is completed, the first phase can be started, provided to remove the reservoir (34) of the plate (6). Indeed, during phases 4 and 5, the reservoir (34) is kept on the plate to limit the drying of the priming fluid on the plate.

FIG. 7 clearly shows that, in order to achieve the cycle faster, the coating of the priming fluid plate (6) (4) is applied during the application of the buffer (5) to the surface (10, 10 ') of the glazing. The priming fluid thus undergoes three transfers during the priming cycle:

- ^1st transfer: from the tank (34) to the plate (6),

- ^2nd transfer: the plate (6) on the lower surface of the pad (5),

- ^3rd transfer: from the lower surface of the pad (5) on the surface (10, 10 ') of the glazing. The priming fluid starting to dry (in particular by solvent evaporation) after the first transfer, when it is on the plate (6), it will take the three-dimensional configuration of this plate and keep this configuration during the two transfers following. Thus, the layer (40, 40 ') has a substantially identical configuration between three dimensions to that of the plate (6) when one considers on the one hand the relief configuration with respect to the background of the plate (6) and of on the other hand, the configuration in relief of the layer (40, 40 ') with respect to the surface (10, 10') of the glazing before the contacting of said plastic material of the joint portion and of the base with said surface (10, 10 ') to which they must adhere.

In the installation used, we can see similarities in shape in two or even three dimensions, between:

the buffer (5) and more precisely its lower surface and the plate (6), and

- the surface (10, 10 ') and the buffer (5) and more precisely its lower surface.

For a good impregnation of the plate, especially when the length of the plate (6) is greater than the diameter of the tank (34), it is possible to take the tank (34) beyond the plate (6), that is to say that is to say that each edge of the plate is in contact twice with the seal (35), once in the one go and once in the return of the reservoir (34).

The cleaning of the underside of the buffer (5) through the web (50) is performed for example between the 5 ^th phase and the 1 ^st phase, every five or ten cycles, to remove on this occasion any remaining fluid of priming on the lower surface of the buffer (5) before reapplying priming fluid. Once the pad (5) has been applied against the haze, the haze impregnated with priming fluid coiled on the receiving roll (51 ') and a new cleaning surface is available by unwinding the dispensing roll (51). As indicated above, after the glazing preparation operation, an operation of forming or applying the portion of seal on the glazing is carried out as part of the manufacturing method according to the invention. In a first variant, illustrated in FIG. 9, the joint portion (2) is formed by extrusion of the plastic material forming the seal on said surface (10), whereas in a second variant, illustrated in FIG. seal portion (2) is formed by encapsulating the plastic forming the seal on said surface (10) and that in a third, non-illustrated variant, said seal portion (2) is preformed on said surface (10). ) to be pasted through the priming layer.

Figure 9 shows an extrusion head (80) which is moved on or above the inner face (11) of the glazing (1) according to the double arrow F.

The plastic material passes through the conduit (81) and is extruded onto the surface (10) through the slot (82). The adhesive bead (24) is illustrated here because it can be co-extruded together with the plastic material of the joint portion, but in general it is applied after the extrusion, just before positioning the glazing in the bay of the bodywork (7), as shown in Figure 1. In the illustrated configuration, the lip (25) does not adhere to the edge (13) of the glazing and the layer (40) is thus deposited only on the inner face (11) of the glazing (1) and more precisely on the opaque layer (14), and the extrusion is carried out so that the base (21) of the joint portion is arranged directly on the layer ( 40). FIG. 10 illustrates two mold parts (91, 92) hermetically closed by means of a seal system (93) on the glazing (1) so as to form a molding cavity which is filled with the constituent plastics material of the joint portion (2) during encapsulation.

In the illustrated configuration, the layer (40) has previously been applied not only to the inner face (11), but also to the edge (13) and on the outer face (12) since the area to prime defined by the surface (10) extends on these three faces.

To do this, a substantially flat pad was applied to each side or an L or U-shaped pad was applied. This solution is of course also applicable when the encapsulation is operated only on two sides of the glazing or a face and a song, or only on one side or only on the edge of the glazing.

In a variant of the invention that is not illustrated, the priming step is performed by pad printing by disposing said priming fluid on a pad and then applying said pad not on the pane but on the surface of the seal portion and / or or accessory.

This variant is compatible with the previous one because it is possible to provide for example a first buffer is applied to a surface of the glazing to prime the glazing where the glazing will be provided with a joint portion and a second buffer is applied on a surface of an accessory to then allow to provide the glazing of this accessory.

Figure 1 1 illustrates a perspective view of a pattern of a snapshot (6). This plate has the shape of a perforated grid made on the upper surface of the strip (60) and having a bottom recessed relative to this surface.

This grid consists of a plurality of pads (61) arranged on the bottom (not shown) recessed downwardly relative to the upper surface of the strip (60), so that the pads each have a vertical axis oriented along the z axis of verticality and perpendicular to the horizontal bottom.

These pads (61) are cylindrical and closed at their end opposite the bottom, but they could also be tubular, open at their end opposite the bottom.

They are of constant circular section, between 1 mm and 10 mm, including these values over a height h of between 20 μm and 2 mm. including these values, but they could also be truncated conic, finer at their opposite end to the bottom.

They could also be of oval section, polygonal (triangular, rectangular, square, pentagonal, hexagonal, ...) Moreover, these studs aligned for example along two horizontal axes perpendicular x and y, are all the same outside diameter and are arranged equidistant from each other along the x-axis and at equal distance b from one another along the y-axis (perpendicular to the x-axis and the z-axis), where a and b are here numbers identical. The distance a from a stud axis to the following along the x axis is, for example, of the order of 8 mm, the distance b from one pin axis to the next along the y axis is, for example, of the order of 8 mm for studs having a constant outer diameter, for example of the order of 5 mm.

However, it is also possible that the pads do not all have the same general external dimensions and that they are not all arranged at the same distance from each other.

In addition, the pads here all have the same height h, which is of the order of 80 microns from the bottom, but it is possible to make a grid with pads of different heights. The pattern of the grid illustrated in FIG. 11 can be defined as being, in plan view, a circle of a diameter equal to the outside diameter of a stud, this pattern being reproduced over the entire bottom of the plate at a distance a along the x-axis and at a distance b along the y-axis.

Thus, when this pattern is inscribed in a circle of diameter equal to 10 mm or a square of side equal to 10 mm, the pattern does not occupy the entire surface of this circle or square.

The reproduction of the pattern of the grid shown in FIG. 11 through the stamp (5) to form a priming layer (40) is illustrated in FIG. 12 in plan view and 13 in perspective view. In the rest of the description, reference is made to the priming layer (40) of the joint portion (2), but the description also applies to the priming layer (40 ') of the accessory (2). ').

This pattern consists of a stud (41) of the same diameter as the stud (61), reproduced at the same distance a along the x-axis and at the same distance b along the y-axis as the stud (61). However, the height h 'of the stud (41) is about half the height h of the stud (61). The reference (42) designates the center of the studs (41).

The pattern of the priming layer (40) illustrated in FIGS. 12 and 13 can also be defined as being, in plan view, a circle of a diameter equal to the outside diameter of a stud, this pattern being reproduced on the entire layer (40), that is to say over the entire surface (10) of the glazing, at a distance a along the x-axis and at a distance b along the y-axis.

Thus, when this pattern is inscribed in a circle C, visible in FIG. 12, of diameter equal to 10 mm or a square of side equal to 10 mm, the pattern does not occupy the entire surface of this circle or respectively of this square.

Between the pads, there is no priming fluid: either it is the opaque layer (14) if the joint portion (2) must be formed on such an opaque layer or if the joint portion (2) is applied, preformed on such an opaque layer, is the surface of the glazing, or the surface of the seal portion or the accessory.

FIG. 14 illustrates an alternative embodiment of the pattern of the layer (40) in which the studs are also of constant circular section over their entire height, but in which small studs (43) approximately 5 to 20 times thinner than the studs (41) are inserted in the space available between these pads (41), the center of these small studs (43) is disposed at about half the distance a of the center (42) of the studs (41) along the axis x and at about half the distance b from the center (42) of the studs (41) along the y axis.

FIG. 15 illustrates an alternative embodiment of the pattern of the layer (40) of FIG. 14 in which the pads (41) are connected by bridges (44) oriented here along the x axis. FIG. 16 illustrates the layer (40) of FIG. 15 as can be seen with the naked eye when the joint portion (2) and the adhesive bead (24) have been removed from the glazing (1) illustrated in Figure 1 manufactured according to the method according to the invention. Both the studs (41), the small studs (43) and the bridges (44) are visible. They make it possible to increase the surface of the priming layer (40), and thus the adhesion force provided by this layer. The pattern of the priming layer is perfectly identifiable gift.

The present invention is described in the foregoing by way of example.

It is understood that the skilled person is able to achieve different variants of the invention without departing from the scope of the patent as defined by the claims.

The skilled person is in particular able to vary the size and / or the number and / or the situation of both portion (s) joint or accessory (s).

It can also design an installation comprising several priming devices and / or a priming device comprising several buffers applied simultaneously or successively in different places against the surface to be primer.

Claims

1. A method of manufacturing a glazing unit (1), in particular a curved glazing unit, comprising at least one joint portion (2) and / or at least one glazing accessory (2 '), said joint portion and / or said accessory adhering to at least one surface (10, 10 ') of said glazing unit (1) and said method comprising a preparation operation before contacting the joint portion (2) and / or the accessory (2') ) against said surface (10, 10 ') of the glazing, said preparation step comprising a priming step of applying a priming fluid (4) on a surface (10, 10') of the glazing or on a surface of the portion joint (2) and / or accessory (2 ') to form a priming layer (40, 40') which will be in direct contact with said joint portion (2) and / or said accessory (2 '), characterized in that said priming step is performed by pad printing by disposing said priming fluid (4) on a buffer (5) and then applying said buffer (5) on said surface (10, 10 ') of the glazing or on said surface of the joint portion (2) and / or the accessory (2').

2. Method according to the preceding claim, characterized in that the application of the priming fluid (4) on the buffer (5) is performed after previously pressing said buffer (5) against a plate (6) coated with fluid of primage (4).

3. Method according to the preceding claim, characterized in that the coating of the cliché (6) of priming fluid (4) is operated during the application of the buffer (5) on the surface (10, 10 ') of the glazing or on the surface of the joint portion (2) and / or the accessory (2 ').

4. Method according to claim 2 or 3, characterized in that the coating of the plate (6) is performed by passing on a reservoir (34) containing the priming fluid (4).

5. Method according to any one of the preceding claims, characterized in that after said preparation operation, said joint portion (2) and / or said accessory (2 ') is formed by extrusion of plastic material on said surface (10, 10 ') of the glazing unit or is formed by plastic encapsulation on said surface (10, 10') of the glazing unit or said joint portion (2) and / or said accessory (2 ') is applied, preformed, on said surface (10, 10 ') of the glazing and adhered to said surface (10, 10').

6. Method according to any one of the preceding claims, characterized in that during said preparation operation said buffer (5) is applied several times against the surface (10, 10 ') of the glazing (1).

7. Method according to any one of the preceding claims, characterized in that during said preparation operation said buffer is applied several times, each time against a surface of a joint portion (2) different and / or a surface of a different accessory (2 ').

8. Installation for manufacturing a glazing unit (1), in particular a curved glazing unit, comprising at least one joint portion (2) and / or at least one glazing accessory (2 '), said joint portion (2) and / or said accessory (2 ') adhering to at least one surface (10, 10') of said glazing (1), said installation comprising at least one device (3) for the preparation of said glazing before the contacting of the portion of seal (2) and / or of the accessory (2 ') against said surface (10, 10') of the glazing, said device (3) comprising means for operating the priming and for applying a priming fluid ( 4) on a surface (10, 10 ') of the glazing or on a surface of the joint portion (2) and / or the accessory (2') to form a priming layer (40, 40 ') which will be direct contact with said joint portion (2) and / or said accessory (2 '), characterized in that said device (3) comprises at least one buffer (5) movable between an application position in which e it is in contact with the surface (10, 10 ') of the glazing or with the surface of the joint portion (2) and / or the accessory (2') and a recharging position in which it is in contact with a reserve of priming fluid (4).

9. Installation according to the preceding claim, characterized in that in the recharging position the contact between the buffer (5) and the reserve of priming fluid (4) is operated via a plate (6).

10. Installation according to the preceding claim, characterized in that said plate (6) comprises a perforated grid and which has a pattern, reproduced preferably several times, so that when this pattern is inscribed in a circle C of diameter equal to 10 mm or a square of side equal to 10 mm, the pattern does not occupy the entire surface of this circle or square.

11. Installation according to the preceding claim, characterized in that said grid comprises a plurality of studs (61) arranged on a bottom, the studs having a circular section, oval or polygonal, this section being constant or narrowing in the opposite direction at the bottom, and the studs possibly being open at their end opposite the bottom.

12. Installation according to the preceding claim, characterized in that said pads (61) have a diameter of between 1 mm and 10 mm including these values and a height h between 20 microns and 2 mm including these values.

13. Installation according to any one of claims 10 to 12, characterized in that at least two pads are joined by means of a bridge.

14. Installation according to any one of claims 8 to 13, characterized in that said buffer (5) has a shape similar in two or three dimensions to that of the surface (10, 10 ') of the glazing or the surface of the joint portion (2) and / or the accessory (2 ').

15. Installation according to any one of claims 8 to 14, characterized in that said plate (6) has a shape similar in two or three dimensions to that of the surface (10, 10 ') of the glazing or the surface of the joint portion (2) and / or the accessory (2 ').

16. Installation according to any one of claims 9 to 15, characterized in that said priming layer (40, 40 ') has a shape similar in two or three dimensions to that of said plate (6).

17. Installation according to any one of claims 9 to 16, characterized in that said device (3) comprises a coating system for coating the plate (6) of priming fluid (4).

18. Installation according to the preceding claim, characterized in that said coating system comprises a reservoir (34) movable on the surface of a strip (60) supporting the plate (6) and in contact with this surface via a seal (35) ceramic or metal or metal alloy.

19. Glazing (1), in particular domed glazing, comprising at least one joint portion (2) and / or at least one accessory (2 ') glazing, said joint portion and / or said accessory (2') ) adhering to at least one surface (10, 10 ') of said glazing unit (1) and said glazing unit (1) comprising between said surface (10, 10') and said joint portion (2) and / or said accessory (2 ') ) a priming layer (40, 40 ') in direct contact with said joint portion (2) and / or said accessory (2'), characterized in that said priming layer (40, 40 ') is perforated and present a pattern, preferably reproduced several times, so that when this pattern is inscribed in a circle C of diameter equal to 10 mm or a square of side equal to 10 mm, the pattern does not occupy the entire surface of this circle or respectively of this square.

20. Glazing (1) according to the preceding claim, characterized in that said priming layer (40, 40 ') comprises a plurality of studs (41), the studs having a circular section, oval or polygonal, this section being constant or narrowing in a direction opposite to the surface on which the priming layer has been deposited and the studs possibly being open at their opposite end to this surface.

21. Glazing (1) according to the preceding claim, characterized in that said pads (41) have a diameter of between 1 mm and 10 mm including these values and a height h 'between 10 microns and 1 mm.

22. Glazing (1) according to claim 20 or 21, characterized in that at least two studs (41) are connected by a bridge (44).

23. Glazing (1) according to any one of claims 19 to 22, characterized in that said pattern is part of a periodic mesh.

24. Glazing (1) according to any one of claims 19 to 23, characterized in that the priming layer is recessed from 0.5 to 10 mm from the edge of the glazing (1) or the edge of the joint portion (2) or the accessory (2 ¹ ) to which it has been applied.

25. Glazing (1) according to any one of claims 19 to 24, characterized in that it comprises between said surface (10, 10 ') of the glazing and said priming layer (40, 40') an opaque layer ( 14) and / or an adhesive layer.

26. Set of glazing (1) according to any one of claims 19 to 25, characterized in that the glazing (1) of this set comprise the same priming layer (40, 40 ') having the same pattern.

27. Use of a pad printing device for performing at least one step of priming a surface of a glazing unit (1) or a surface of a joint portion (2) and / or accessory portion (2). ') glazing, in particular for a curved glazing, for applying a priming layer (40, 40') on the surface (10, 10 ') of said glazing (1) which will be in direct contact with at least one joint portion (2) and / or at least one accessory (2 ') or to apply a priming layer on the surface of the joint portion (2) and / or the accessory (2') and allow to adhere this portion of seal (2) and / or this accessory (2 ') to said surface (10, 10'), by disposing a priming fluid (4) on a buffer (5) and then applying said buffer (5) to the surface (10, 10 ') of the glazing or on the surface of the joint portion (2) and / or the accessory (2').