FR3052768A1 - METHOD FOR MANUFACTURING A GLASS ARTICLE - Google Patents

Abstract

A blank (20) of glass article is formed by pressing. The glass article blank forms a hollow container, which includes an outer surface (27) and an inner surface (28). The glass article blank (20) is placed in a cooling station (51), which includes a receptacle (44) having an interior surface (45). The glass article blank (20) is held in the receptacle (44) by adjusting the inner surface (45) of the receptacle (44) to the outer surface (27) of the article blank (20). glass. The inner surface (28) of the glass article blank (20) is cooled by injecting a cold fluid into the hollow container without deforming the outer surface (27). The glass article (120) is removed from the cooling station (51).

Description

The invention relates to the field of manufacturing processes for glass articles.

To form a glass container, it is customary to use a blowing technique, whereby the shape of the container is achieved by blowing a hot gas into a drop of deformable molten glass, to impart to it a given form.

For various reasons, it is preferable to this method of blowing a pressing process, by which a drop of deformable molten glass is taken in a molding cavity, defined by a tank and a punch, and matches the shape of this cavity. The pressing process makes it possible to produce containers with wide opening.

One of the difficulties associated with the pressing process is the difficulty of producing various interior shapes for the container. These inner shapes can be used for customizing the container, giving it a strong identity. Another advantage is to be able to easily generate containers with the same external appearance, but differing in internal volume. Another interest may for example also be to generate a container whose shape is optimized for its operating conditions with less material, and therefore at lower cost. One can for example generate an inner shape in places where the mechanical strength of the container is largely sufficient. Achieving such shapes can be difficult because, because the punch must be out of the tank, it is preferred for the punch a conical shape, or cylindrical, to avoid any risk of deterioration of the glass upon the output of the punch.

An exemplary embodiment for producing relief shapes inside a bottle is to make grooves extending along the extraction axis of the punch. In such a case, the glass material being formed does not prevent the exit of the punch.

To form a relief inside the container by a molding process, it is possible to implement a punch comprising a mobile system, as proposed for example in FR 2 975 988. This punch can take two configurations, one in which a device can be used. printing prints the relief, but in which the punch can not be pulled out, and one where the printing device is retracted, which allows the punch to be pulled out.

Although such a method is of great interest, especially to form deep inside shapes inside the bottle, the practical implementation is limited because of the extremely high temperatures to which the system is subjected, which pose difficulties in the realization of a reliable mobile system in a sustainable way over time. Other methods have been developed for this purpose, such as EP 2 602 232, or WO 2014/195,644 where the phenomenon of removal of the glass is used to unmold the punch.

Yet another option is to extract the punch by screwing. Such screwings are described in FR 2 153 382. In this embodiment, the punch is extracted in a helical movement, which allows to form a helical shape in relief inside the bottle. One of the limitations of this embodiment, however, is that it only allows for helical shapes. Anecdotally, it may also be noted US 4,072,491, which describes the realization of a "helical" shape by axial extraction of the punch. It is in fact a false helix, not including areas of glass material likely to prevent the axial extraction of the punch, which is possible only because of the very conical shape of the inner wall of the bottle. The propeller is thus made in the conical wall of the container, but the outer wall of the container remains narrowed monotonously between these two ends.

The aim of the document is to propose a process for the manufacture of glass containers by pressing, which makes it possible to use a large number of internal relief shapes, without resorting to mechanisms exposed to very high temperatures, and with a good geometric accuracy of the final geometry.

Hereinafter, a presentation of the invention.

According to a first aspect, the subject of the invention is a method of manufacturing a glass article in which: a) a glass article blank is formed by pressing, the glass article blank forming a hollow container comprising an outer surface and an inner surface opposed to the outer surface, b) placing the glass article blank in a cooling station comprising a receptacle provided with an inner surface, the glass article blank being held in the receptacle by adjusting the inner surface of the receptacle to the outer surface of the glass article blank; c) cooling the inner surface of the glass article blank by injecting a cold fluid into the receptacle; the hollow container without deforming the outer surface, thereby forming a glass article, d) removing said glass article from the cooling station.

Thanks to these provisions, it accelerates the cooling of the internal surface of the article in order to freeze the shape thereof after demolding the punch. This characteristic makes it possible to limit the natural casting of the glass, which is still fluid, under the effect of gravity, subsequent to demoulding the punch while the blank is still hot. This makes it possible to generate interior patterns of great precision.

According to one embodiment, during step a), both a container portion adapted to contain a product, and a closure portion made of material with the container portion, and adapted to cooperate with a lid to form a container, are formed. close the container portion.

In one embodiment, forming a closure portion comprising a thread or a boss.

According to one embodiment, during step a), an internal surface having a general shape and at least one localized pattern superimposed on the general shape is formed, and having characteristic dimensions at least five times smaller than those of the general shape. .

According to one embodiment, during step a), an inner surface is formed having at least one edge inclined at most 30 "relative to the horizontal, in particular horizontal.

According to one embodiment, during step a), an internal surface having a general shape and at least one localized facet superimposed on the general shape, defined by at least three edges, and having characteristic dimensions at least five times, is formed. less than those of the general form.

In one embodiment, during step a), an inner surface is formed having a bottom and a side surface extending from the bottom toward a mouth.

According to one embodiment, at least one localized pattern, at least one edge, at least one facet, respectively, are formed on the lateral surface.

According to one embodiment, during step b), the maximum distance (e) between the inner surface of the receptacle and the external surface of the glass article blank is less than 1 millimeter, preferably less than 0.5. mm, or even less than 0.25 mm.

According to one embodiment, during step c), a cold gas is injected, in particular cold air.

According to one embodiment, during step a): a1) there is provided a forming vessel comprising an inner surface for forming the outer surface of the glass article blank, a2) a punch is provided forming means comprising an outer surface for forming the shape of an inner surface of the glass article blank, a3) placing the forming punch in the forming vessel, in a forming position, in which a space of receiving is defined between the inner surface of the forming vessel and the outer surface of the forming die, a drop of deformable glass extending partially into the receiving space, a4) applying an output displacement to the forming die .

According to one embodiment, during step a3), a drop of deformable glass is provided in the forming vessel, the forming punch is moved according to an input movement from an initial position into the forming position, while deforming thus the drop of deformable glass to extend it partially in the reception space.

According to one embodiment, between steps a3) and a4), the glass drop is cooled in a controlled manner so as to retain the outer surface of the glass drop on the inner surface of the forming vessel, and to detach the inner surface the drop of glass from the outer surface of the forming punch.

According to one embodiment, after step d), e) implementation of finishing operations to generate a container.

According to another aspect, the invention also relates to a process for manufacturing a bottle for a chemical, cosmetic, pharmaceutical or food product, in which: a method of manufacturing an article in which glass, - the glass article is filled with a chemical, cosmetic, pharmaceutical, or food product and the glass article is closed with access to the chemical, cosmetic, pharmaceutical, or food product.

The figures of the drawings are now briefly described.

Figure 1 is a diagram corresponding to a cross section in a mold that can be used in the context of the invention.

Figure 2 is a view corresponding to Figure 1 in the forming position of the punch.

Figure 3 is a view corresponding to Figures 1 and 2 in the output position of the punch.

Figure 4 is a partial sectional view of a container blank obtained by the method described with reference to Figures 1 to 3.

Figure 5 is a top view of the mold of Figure 1.

Figure 6 is a schematic diagram of a subsequent cooling step.

Figure 7 is a partial sectional view of a container.

Figures 8a, 8b, 8c are schematic partial views of pattern details on the outer surface of the punch.

Figure 9 is a schematic view of a manufacturing facility.

Hereinafter a detailed discussion of several embodiments of the invention with examples and reference to the drawings.

In the figures, the same references designate identical or similar elements.

The container 120 to be formed is shown in Figure 7. It generally comprises a main body 121 and a ring 122. The main body 121 has a hollow shape for containing a content, in particular liquid or pasty, for example of the type of a cosmetic product (perfumes, powder, ...), pharmaceutical, or food (drink, especially alcohol). Main body 121 can be referred to as a "container portion". The ring 122 is integral with the main body 121, and defines a mouth 123 through which the contents may be introduced or removed, and a closure interface 146 for cooperating the container 120 with a cover 124. The ring 122 by "closing portion".

In the example shown, the container 120 comprises a bottom 125 and a peripheral side wall 126 connected to the bottom. The container 120 includes an outer surface 127 and an opposite inner surface 128. Thus, the outer surface 127 includes an outer bottom surface 129 and a peripheral outer sidewall surface 130. These two outer bottom surfaces 129 and peripheral sidewall 130 are optionally interconnected by one or more ridges 131. The inner surface 128 comprises an inner bottom surface 132 and a peripheral side wall inner surface 133. These two inner bottom surfaces 132 and peripheral side wall 133 are if necessary interconnected by one or more edges 134. The outer 129 and inner 132 bottom surfaces are facing each other and define the bottom 125, and the outer 130 and inner surfaces 133 of lateral peripheral surface are facing each other and define the lateral peripheral wall 126.

The inner surface 128 of the container also has patterns 149. A pattern 149 is defined as a shape of which a characteristic dimension, at least two characteristic dimensions, in particular any characteristic dimension, is of an order of magnitude less than the general shape of the internal surface 128 of the container. By "an order of magnitude less", at least dimensions are understood at least 5 times, or even at least 10 times smaller than the characteristic dimensions of the container. Thus, a pattern 149 has a local alteration of the overall shape of the inner surface 128 of the container which does not affect the overall shape of the inner surface 128 of the container. A pattern 149 is also of characteristic dimensions sufficient to be detectable to the naked eye. Thus, a pattern 149 is superimposed on the general shape of the container.

An edge between two adjacent portions of the inner surface 128 of the container is apt to form a pattern. We will focus in particular on the case where the edge is horizontal, or if the edge is close to the horizontal (for example inclined less than 30 ° with respect to the horizontal) in the normal orientation of container storage.

A facet 150 drawn in the inner surface 128 of the container is capable of forming a pattern. A facet 150 is for example defined by the intersection of several edges two by two, for example three edges forming a triangular facet, four edges forming a quadrilateral facet ....

A pattern 149 may also be defined by a localized shape in relief and / or recessed with respect to the general shape of the internal surface 128 of the container without it being defined by a projecting edge, but rather by a continuous transition. .

The different patterns described above can be combined on the same internal surface 128 of the container.

There is shown in Figure 1 a mold 1 used for the manufacture of a glass container by pressing. The mold 1 comprises a forming tank 2 and a forming punch 3. The mold 1 defines a cavity 4 (receiving space) between the forming tank 2 and the forming punch 3.

More particularly, the forming vessel 1 may comprise two lateral portions 42a, 42b radially movable between a molding configuration, as shown in FIG. 1, and an extraction configuration, and a also movable bottom portion 43, for example laterally, between the molding configuration, as shown in FIG. 1, and an insertion / extraction configuration. The forming tank 1 may also comprise two mold portions 36a, 36b dedicated to the ring molding of the container. The two portions 36a, 36b may also be radially movable between the molding configuration, as shown in FIG. 1, and an extraction configuration.

In the molding configuration, the side portions 42a, 42b, the bottom portion 43 and the mold portions 36a, 36b are assembled to form a sealed forming vessel capable of withstanding the efforts of forming a glass container blank. .

In Figure 1, the mold 1 is shown in an open configuration. That is, the forming punch 3 is in relation to the forming tank 2 in an initial position. The forming punch 3 and the forming tank 2 are movable relative to each other. To fix the ideas, it will be considered later that the forming tank 2 is fixed, and that the forming punch 3 is movable relative to the forming tank 2. The forming punch 3 is movable relative to the tank of forming 2, on the one hand between an initial position, shown in Figure 1 and a forming position, shown in Figure 2, and on the other hand between the forming position shown in Figure 2 and an extended position, shown In order to fix the ideas, the forming punch is shown below the forming vessel, but alternatively, the process could be carried out in a reverse orientation.

Where appropriate, the initial position shown in Fig. 1 and the extended position shown in Fig. 3 are identical, so that the movement of the forming punch 3 can be repeated periodically to form a plurality of glass containers so as to successive. Between its initial positions, shown in Figure 1 and its forming position, shown in Figure 2, the forming punch 3 is subjected to an input movement. Between its forming positions, shown in Fig. 2 and its output position, shown in Fig. 3, the forming punch is subjected to output displacement. The trajectories of these displacements can, if necessary, be opposed. That is, the positions taken by the forming punch 3 during its input movement and during its output displacement are the same, the order in which these positions are taken being opposite.

The forming tank 2 is in the form of a container capable of receiving a drop of molten glass. Thus, the forming vessel 2 is capable of withstanding temperatures in the range of about 600 ° to about 1200 °. The forming tank 2 can take any suitable form. In the relatively simple example presented, the forming vessel 2 comprises a bottom 5 and a lateral peripheral wall 6 extending from the bottom 5. The lateral peripheral wall has a lower opening 7 opposite the bottom. The forming vessel 2 has an inner surface 8 for forming the shape of an outer surface of a wall of a container blank. The inner surface 8 comprises an inner bottom surface 9 and an inner lateral peripheral wall surface 10. In the example shown, these two inner surfaces are interconnected by one or more edges 11. However, this is only illustrative.

The inner bottom surface 9 has any suitable shape. The inner surface of the lateral peripheral wall 10 has any suitable shape. For example, the inner peripheral side wall surface 10 is provided with a cylindrical shape along a tank axis U. Alternatively, a tapered inner surface narrowed towards the bottom 5 could be provided. U axis, the inner peripheral side wall surface 10 has any suitable shape. For example, in the example presented, purely illustrative, a hexagonal form is provided. This section may be continuous along the axis U, constant, or for example homothetic along the axis U with respect to a central point located inside the internal surface of lateral peripheral wall 10.

Alternatively, the lateral peripheral wall 10 could have a different geometry, adapted to generate relief shapes or patterns in the outer surface of the container wall.

The forming punch 3 is in the form of a projection capable of forming a drop of molten glass. Thus, the forming punch 3 is capable of withstanding temperatures of the order of 1000 ° C, approximately. The forming punch 3 can take any suitable form. At the macroscopic scale, the forming punch 3 comprises a body 12 and a cover 13. The forming punch 3 has an outer surface 14 intended to have the shape of an internal surface of a wall of the container. The outer surface 14 comprises an outer body surface 15 and an outer ring surface 16. The outer body surface 15 itself has an outer bottom surface 17 and an outer peripheral side wall surface 18. In the example shown these two outer surfaces are interconnected by one or more ridges 19. However, this is illustrative only.

The outer bottom surface 17 has any suitable shape. The outer peripheral side wall surface 18 will be described in greater detail hereinafter on the macroscopic scale, that is to say seen from a distance on the scale of the dimensions of the container, without taking into account the local patterns object of the invention which will be described in more detail below. For example, it is provided, on the scale of the dimensions of the container, for the outer peripheral side wall surface 18, a frustoconical shape narrowed in the direction of the outer surface of the bottom 17, for example with a cone angle of the order from 2 ° to 10 °. Alternatively, a cylindrical outer surface could be provided along a punch axis R. In cross-section with respect to the axis R, the external lateral peripheral wall surface 18 has any suitable shape. For example, in the example presented, purely illustrative, there is provided an octagonal shape. This section may be continuous along the axis R, constant, or for example homothetic, along the axis R with respect to a central point located inside the lateral peripheral wall outer surface 18.

The outer surface 14 of the forming punch also has patterns 47. The patterns 47 of the outer surface 14 of the forming punch are provided to form the patterns 149 of the inner surface 128 of the glass container 120. Thus, the description hereof above the patterns of the container 120 is transferable to the forming punch, it being understood that, for reasons of molding process, from a macroscopic point of view, the shape of the outer surface 14 of the forming punch 3 is a negative of the shape of the inner surface 128 of the container 120.

An edge 48 between two adjacent portions of the outer surface 14 of the forming punch is capable of forming a pattern. Of particular interest is the case where the edge 48a is horizontal, or if the edge 48b is close to the horizontal (for example inclined by less than 30 ° relative to the horizontal), as shown on Figure 8a.

A facet 49 drawn in the outer surface 14 of the forming punch is capable of forming a pattern. A facet 49a is for example defined by the intersection of several edges 48 in pairs, for example three edges 48a forming a triangular facet, four edges 48b forming a facet 49b quadrilateral, ... as shown in Figure 8b.

A pattern 47 may also be defined by a localized shape in relief and / or recessed with respect to the general shape of the outer surface 14 of the forming punch without it being defined by a projecting edge, but rather by a continuous transition, as for example shown in Figure 8c.

The various patterns represented by way of example in FIGS. 8a, 8b, 8c can be combined on the same external surface 14 of the punch.

In the example shown, these patterns are formed on the outer surface of the side peripheral wall 18 of the punch. In addition, one could also provide patterns on the outer surface of the bottom 17 of the punch.

Initially, the bottom portion 43 of the forming tank 1 is removed, and a drop of molten glass 35 is deposited on the forming punch 3. Then, the forming tank 2 is assembled.

As can be understood from Figure 1, the forming vessel 2 and the forming punch 3 cooperate to define a cavity 4 of shape defining the shape of a container blank 20. As such, the inner surface 8 of the forming vessel 2 and the outer surface 14 of the forming punch 3 define the shape of the container blank 20. In the example shown, the container blank 20 is shown in FIG. 4. It has a similar shape to the final container 120. The description of the container blank 20 can therefore be made similar to that of the container 120, by removing "100" from the reference number designating similar characteristics.

Thus, the container blank 20 generally comprises a main body 21 and a ring 22. The main body 21 has a hollow shape intended to contain a content, in particular liquid or pasty, for example of the type of a cosmetic product (perfumes , powder, ...), pharmaceutical, or food (drink, especially alcohol). The main body 21 can be designated as "container portion". The ring 22 is integral with the main body 21, and defines a mouth 23 through which can be introduced or removed the contents, and a closure interface 46 for cooperating the container 120 with a cover 124. It can be designated ring 22 with "closing portion". The container blank 20 comprises a bottom 25 and a peripheral side wall 26 connected to the bottom. The container blank 20 includes an outer surface 27 and an opposing inner surface 28. Thus, the outer surface 27 includes an outer bottom surface 29 and an outer peripheral side wall surface 30. These two outer bottom surfaces 29 and peripheral wall 30 are optionally interconnected by one or more ridges 31. The inner surface 28 comprises an inner bottom surface 32 and a peripheral side wall inner surface 33. These two bottom internal surfaces 32 and side wall device 33 are optionally interconnected by one or more edges 34. The outer 29 and inner 32 bottom surfaces are facing each other and define the bottom 25, and outer 30 and inner surfaces 33 of lateral peripheral surface are facing each other and define the lateral peripheral wall 26.

In the forming position, shown in FIG. 2, the forming punch 3 and the forming bowl 2 are associated with each other to define the shape of the container blank 20. In particular, the outer surface 14 of the forming punch 3 is placed facing and away from the inner surface 8 of the forming vessel 2. Thus, the outer bottom surface 17 of the forming punch 3 faces the bottom internal surface 9 of the vessel The outer side peripheral wall surface 18 of the forming punch 3 faces the inner side peripheral wall surface 10 of the forming vessel 2. In this forming position, a drop of deformable molten glass 35 is deformed. so as to extend between the forming punch 3 and the forming vessel 2. The material to be formed has a coefficient of expansion of the order of 90.10 "7qC" 1. The drop of glass 35 fills the cavity 4, and matches the internal surfaces 8 of the forming vessel 2 and outer 14 of the forming punch 3. The thickness between the inner 8 and outer 14 surfaces is for example at least 2 mm, preferably at least 2.5 mm, and can reach 1 cm, depending on the dimensions of the container to be formed. It will be noted that the ring 22 of the container blank may, if appropriate, also be formed by any appropriate means, for example by using the two mold portions 36 that are displaceable relative to the forming tank 2 along an axis transverse S, for example radial. The cover 13 of the forming punch 3 cooperates with the forming vessel 2 or the mold portion 36 to close the cavity 4.

The forming punch 3 is held in the forming position for a period of time during which the temperature of the deformed glass drop decreases. The time required depends on the weight of the glass and the depth of the pattern to be formed, but is typically of the order of 2 to 30 seconds.

While the forming punch 3 is held in its forming position, the drop of molten glass cools, because the forming tank 2 and the forming punch 3 are of a lower temperature than the drop of molten glass 35. In the course of this cooling, there is a phenomenon of removal of the glass. In particular, differential cooling of the outer and inner surfaces of the glass drop is implemented. The outer surface 40 of the drop of glass, intended to form the outer surface 27 of the container blank is arranged facing the inner surface 8 of the forming vessel 2. The inner surface 41 of the drop of glass, intended to form the inner surface 28 of the container blank is disposed facing the outer surface 14 of the forming punch. By implementing a differential cooling of these two surfaces, the outer surface 40 of the drop of glass is retained on the inner surface 10 of the forming vessel 3. The inner surface 41 of the glass drop is detached from the outer surface The differential cooling is obtained by controlling the temperatures of the forming punch 3 and the forming vessel 2. The forming vessel 2 has a larger exchange surface, with the drop of molten glass, and can be maintained with an inner surface at a controlled temperature around 400 ° C to 600 ° C. The outside of the forming tank 2 is maintained at a much lower temperature, for example of the order of 100 ° to 300 ° C. Thus, a large heat flow takes place through the forming tank 2.

The forming punch 3, immersed in the heart of the drop of molten glass, is maintained at a temperature below the inner surface of the forming vessel. The outer surface of the forming punch is for example maintained between 300¾ and 500¾. The temperature of the forming punch is lower than the temperature of the inner surface of the forming tank 2. This may require actively cooling the forming punch 3. For example, it is expected that the forming punch 3 comprises a thin shell of which the outer surface forms the outer surface 14 of the forming punch, and a hollow inner space which is actively cooled, for example by providing a cooling fluid on the inner face of the shell. The supply of cooling fluid is for example geometrically distributed to correspond, in each zone, the mass of glass facing the outer surface of the forming punch in this area.

During the detachment of the inner surface 41 of the glass drop from the outer surface 14 of the forming punch 3, unless one works under a vacuum atmosphere, a gas, such as ambient air, can come between the inner surface 41 of the drop of glass and the outer surface 14 of the forming punch 3. Thus, in a subsequent state of the glass drop, obtained after a certain time with the forming punch 3 in the position of forming, the outer surface 40 of the glass drop may not have changed position significantly. On the contrary, the position of the inner wall 41 of the drop of glass in this subsequent state has been changed with a radially outward movement. This shrinkage is for example of the order of 0.05 mm to 0.5 mm for the types of containers considered here.

After a certain time, an output displacement is applied to the forming punch to place the forming punch 3 in its output position shown in FIG. 3. The thus formed container blank 20 is shown in FIG. 4. In addition to the general description already made of this blank of container 20, the inner surface 28 of the container blank 20 has patterns 49. A pattern 49 is defined as a shape of which a characteristic dimension, at least two dimensions characteristics, or even any characteristic dimension, is of an order of magnitude less than the general shape of the inner surface 28 of the container blank. Thus, a pattern 49 exhibits local alteration of the overall shape of the inner surface 28 of the container blank which does not affect the overall shape of the inner surface 28 of the container blank. A pattern 49 is also of characteristic dimensions sufficient to be detectable to the naked eye.

The container blank 20 can then be removed from the forming vessel 2 by any suitable means. For example, as shown diagrammatically in FIG. 9, the bottom portion 43 is removed, the container blank 20 is caught with a tool 52 adapted, and the lateral portions 42a, 42b, 36a, 36b are moved radially. forming vessel 1. The container blank 20 is moved out of the forming vessel 1 with the tool 52. The container blank 20 is then moved into a cooling station 51. For example, the tool 52 moves the container blank 20 in the cooling station 51. The cooling station 51 is provided to rapidly freeze the inner shape of the container blank 20 without deforming its outer shape.

As shown in FIG. 6, the container blank 20 is placed in a receptacle 44. The receptacle 44 can for example comprise several portions 44a, 44b movable radially between a closed configuration, represented in FIG. 6, and an open configuration where they are further spaced to allow rapid insertion of the container blank 20 (especially if the container blank 20 has an outer shape that is not insertable into the closed configuration receptacle 44). The receptacle 44 includes an inner surface 45 strictly fitted to the outer surface 27 of the receptacle blank 20. Although different embodiments are possible depending on the size of the receptacle blank 20, it is conceivable that a maximum deviation e of 1 mm, or even 0.5 mm, or even 0.25 mm, between the inner surface 45 of the receptacle 44 and the outer surface 27 of the container blank 20 makes it possible to implement the invention at a sufficient rate. Reducing this gap could pose more problems when inserting the container blank 20 into the receptacle, and increasing it might allow for substantial deformation of the container blank 20 during cooling. The container blank 20 is subjected to a cold fluid flow that rapidly cools the inner surface 28 of the container blank 20. The fluid is said to be cold if it is at a temperature below the container blank. A nozzle 53 generates the cold fluid flow. The fluid is for example a gas. This may be for example air, especially air outside the plant in which the container is manufactured. The nozzle 53 may in particular completely close the mouth 23, so as to inject the cold fluid into the hollow portion of the container blank 20. The fluid is injected without special power, and is not intended to deform the wall The above step makes it possible to rapidly freeze the geometry of the inner surface 28 of the container blank 20. The method described above allows: - To easily exit the forming punch 3 at a time when the glass material is still hot and sufficiently malleable to be able to deform to allow this output of the forming punch 3 (with respect to an output of the cold punch, this step makes it possible on the one hand not to generate excessive efforts on the punch, and therefore increase its longevity, and secondly not to generate marks, traces or defects on the inner surface 28 of the container blank 20), - Obtain to achieve a good reproducibility of the pattern, by limiting the pouring phenomenon of the glass, under the effect of gravity or inertial forces during the displacement of the container blank 20, which would deform the formed patterns, by applying a rapid cooling a Once the forming punch 3 out, - To maintain a rapid production rate by the use of two different stations dedicated to two separate stages.

The glass article thus formed is then removed from the cooling station. The container blank 20 once cooled forms the container 120. This container is removed from the cooling station. The geometry of the glass article is therefore, thanks to the invention, very similar to that of the container blank 20, and will not be described in more detail here. The above invention has been described in a particular section plane of the forming punch 3. A forming punch 3, the general shape of which is profiled on its periphery, could be used, so that any cross-section comprising the R axis has the same form as the one just described. As a variant, the invention can be used to produce more complex shapes inside the container 20. A purely illustrative example is shown in FIG. 5, which shows on the one hand the upper peripheral wall 141 and the lower peripheral wall 142 of the forming punch 3 (excluding cover 13, which is not shown).

According to one embodiment of the invention, a glass container is then available. Different finishing steps can be applied to this glass container, such as deposit coatings, for example. The container 120 thus formed can be filled with a content. A lid 124 may be assembled to the container 120 to form an article ready to be packaged and sent or sold. The cover 124 cooperates with the container 120 removably, can be placed alternately in a closed state where it prevents access to the content, or an open state where it allows access. The lid 124 is retained on the glass container by screwing, pressing, or the like. Therefore, the ring 122 may comprise a boss or a thread adapted to this closure. Alternatively, the cover 124 can be permanently fixed on the container 120, and the contents accessible via a distribution system carried by the cover 124.

Claims (15)

claims A method of manufacturing a glass article in which: a) forming a blank (20) of glass article by pressing, the glass article blank forming a hollow container comprising an outer surface (27) and an inner surface (28) opposite to the outer surface (27), b) placing the glass article blank (20) in a cooling station (51) having a receptacle (44) having a surface interior (45), the glass article blank (20) being held in the receptacle (44) by adjusting the inner surface (45) of the receptacle (44) to the outer surface (27) of the blank ( 20) of glass article, c) cooling the inner surface (28) of the glass article blank (20) by injecting a cold fluid into the hollow container without deforming the outer surface (27), thereby forming a glass article (120), d) removing said glass article (120) from the cooling station (51). A method of manufacturing a glass article according to claim 1, wherein, in step a), both a container portion (21) adapted to contain a product, and a portion of closure (22) integral with the container portion (21), and adapted to cooperate with a lid (124) for closing the container portion (21). 3. A method of manufacturing a glass article according to claim 2, wherein forming a closure portion (22) comprising a thread or a boss. 4. A method of manufacturing a glass article according to one of claims 1 to 3, wherein, during step a), forms an inner surface (28) having a general shape and at least one pattern (49) located superimposed on the general shape, and having characteristic dimensions at least five times smaller than those of the general shape. 5. A method of manufacturing a glass article according to one of claims 1 to 4, wherein, during step a), forms an inner surface (28) having at least one edge inclined to plus 30 ° with respect to the horizontal, in particular horizontal. 6. A method of manufacturing a glass article according to one of claims 1 to 5, wherein, during step a), forms an inner surface (28) having a general shape and at least one facet localized superimposed on the general shape, defined by at least three edges, and having characteristic dimensions at least five times smaller than those of the general shape. A method of manufacturing a glass article according to one of claims 1 to 6, wherein in step a) an inner surface having a bottom (32) and a side surface (33) is formed. ) extending from the bottom (32) towards a mouth (23). A method of manufacturing a glass article according to claim 7 and at least one of claims 4, 5 and / or 6, wherein at least one pattern (49) located, at least one edge, at least a facet, respectively, are formed on the lateral surface (33). 9. A method of manufacturing a glass article according to one of claims 1 to 8, wherein during step b), the maximum distance (e) between the inner surface (45) of the receptacle (44). and the outer surface (27) of the glass article blank (20) is less than 1 millimeter, preferably less than 0.5 millimeter, or even less than 0.25 millimeter. 10. A method of manufacturing a glass article according to one of claims 1 to 9, wherein during step c), a cold gas is blown, including cold air. 11. A method of manufacturing a glass article according to one of claims 1 to 10, wherein, during step a): a1) is provided a forming vessel (2) comprising an inner surface (8). ) for shaping the outer surface (27) of the blank (20) of glass article, a2) providing a forming punch (3) comprising an outer surface (14) for forming the an inner surface (28) of the glass article blank, a3) placing the forming punch (3) in the forming vessel (2), in a forming position, in which a receiving space ( 4) is defined between the inner surface (8) of the forming vessel (2) and the outer surface (28) of the forming die (3), a deformable glass drop (35) extending partially into the space receiving means (4), a4) an output displacement is applied to the forming punch (3). 12. A method of manufacturing a glass article according to claim 11, wherein, in step a3), is provided in the forming vessel (2) a drop of deformable glass (35), the punch is moved for forming (3) according to an input movement from an initial position into the forming position, thereby deforming the deformable glass drop (35) to extend it partially into the receiving space (4). ). A method of manufacturing a glass article according to claim 11 or 12, wherein, between steps a3) and a4), the glass drop (35) is cooled in a controlled manner so as to retain the outer surface ( 40) of the glass drop (35) on the inner surface (8) of the forming vessel (2), and detaching the inner surface (41) of the glass drop (35) from the outer surface (14) forming punch (3). 14. A method of manufacturing a glass article according to one of claims 1 to 13 wherein, subsequent to step d), e) performs finishing operations to generate a container (120). 15. A method of manufacturing a bottle for a chemical, cosmetic, pharmaceutical, or food product, wherein: - a method of manufacturing a glass article (120) according to one of claims 1 to 14, - the article (120) is filled with a chemical, cosmetic, pharmaceutical or food product and the glass article (120) is closed with access to the chemical, cosmetic, pharmaceutical or food product; .