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EP1056980A1 - Method for drying a hollow body and implementing device - Google Patents

Method for drying a hollow body and implementing device

Info

Publication number
EP1056980A1
EP1056980A1 EP99902601A EP99902601A EP1056980A1 EP 1056980 A1 EP1056980 A1 EP 1056980A1 EP 99902601 A EP99902601 A EP 99902601A EP 99902601 A EP99902601 A EP 99902601A EP 1056980 A1 EP1056980 A1 EP 1056980A1
Authority
EP
European Patent Office
Prior art keywords
hollow body
drying
suction
tube
agent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP99902601A
Other languages
German (de)
French (fr)
Other versions
EP1056980B1 (en
Inventor
Guy Sidel S.A. FEUILLOLEY
Véronique Sidel S.A. BERNARD
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sidel SA
Original Assignee
Sidel SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sidel SA filed Critical Sidel SA
Publication of EP1056980A1 publication Critical patent/EP1056980A1/en
Application granted granted Critical
Publication of EP1056980B1 publication Critical patent/EP1056980B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/006—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects the gas supply or exhaust being effected through hollow spaces or cores in the materials or objects, e.g. tubes, pipes, bottles

Definitions

  • the invention relates to a method for drying hollow bodies. It applies very particularly, although not exclusively, to the drying of containers between their manufacture and their filling, or even to the drying of preforms or blanks of containers during the container manufacturing process. It also relates to a device for implementing the method.
  • drying within the meaning of the present invention, is meant a procedure for removing traces or a small volume of liquid remaining inside or on the walls of a hollow body. Drying is therefore an operation which can follow, for example, the draining or emptying of a hollow body after a cleaning, rinsing or sterilization operation, having required the prior filling of the hollow body; it may also be a question of removing the residues or traces of a sterilization agent or of any other treatment agent previously deposited on the external or internal walls of the hollow body.
  • PET plastic containers
  • PEN plastic containers
  • the drying methods and the corresponding devices known hitherto are not suitable in the sense that they do not make it possible to ensure a distribution of the drying agent over the entire internal surface, also called the internal wall, of the hollow body when it is essentially this surface which must be dried; moreover, the known devices are not "universal" in the sense that they do not allow the treatment of hollow bodies having distinct shapes from each other, or even that they are not suitable for treatment of any type matter.
  • a known solution for drying hollow bodies consists in heating them in order to evaporate the remaining liquid therein.
  • Another solution is to blow hot air into the hollow bodies.
  • This solution is not suitable for drying hollow bodies having particular shapes such as bottles or flasks.
  • the subject of the invention is therefore a method and a device which do not have either of the aforementioned drawbacks, namely which allow: drying of the entire surface; a possibility of application, without significant modification of the device, in the event of a change of hollow body to be dried; an application to any type of hollow body (bottles, jars, flasks, basins, tubes ...); an application to any type of material.
  • a method for drying hollow bodies is characterized in that it consists in causing a gaseous current to entrain a drying agent towards all of the surfaces in order to distribute it over all of said surfaces.
  • driving that is to say by guiding the agent on the surfaces, one obtains a correct distribution of it unlike the devices where the agent is projected or blown inside.
  • a simple entrainment of the agent after its introduction, makes the process usable with any type of material; as will be explained below, the method can be implemented with a relatively simple device usable for any type of hollow body whatever their shape or size, and without there being any need to modify it notably when the shape and / or the dimensions of the body are changed.
  • Another advantage is that the entrainment of the agent by a gaseous entrainment current makes it possible to carry out the drying whatever the arrangement of the hollow body, that is to say whatever the position of its opening (top , low or other).
  • the introduction of the agent is caused by the exterior of the hollow body, close to its opening, and the drive current is produced by causing the agent to be aspirated by means suction acting opposite the opening in the hollow body.
  • Figure 1 is a block diagram of a device for drying hollow bodies according to one invention
  • Figure 2 is a block diagram of a preferred device
  • Figure 3 is a diagram of a variant of the devices of Figures 1 and 2 applicable to the drying of tubes or conduits.
  • the device shown in Figure 1 includes a generator 1 of drying agent.
  • the drying agent can be a dry or hot gas, such as air, or any other suitable agent (desiccant, for example).
  • the generator 1 is a generator of hot air at high temperature.
  • the drying agent is a flame and the generator 1 is then a burner.
  • the generator 1 is arranged outside the hollow body 2 (here a container preform), near the opening of the latter, and the generator outlet is oriented so that the agent can be directed into the interior of the hollow body.
  • a tube 3 is introduced into the hollow body through its opening 4.
  • a end 5 of the tube is near an area of the hollow body distal to the opening (the bottom area in the case of a container); the other end of the tube is located outside the container and is connected either directly or via a conduit 6 to a suction source 7.
  • the longitudinal axis of the tube 3 is aligned with that of the hollow body.
  • the outside section of the tube is substantially smaller than the inside section of the opening of the hollow body so that the drying agent can enter the hollow body through the peripheral space remaining between the tube and the opening of the hollow body.
  • means are provided for the establishment or removal of the hollow body 2 relative to the device.
  • means are provided allowing relative axial displacement between the hollow body 2 and at least the tube 3.
  • At least the tube 3 is sliding in the axial direction (double arrow 8) to allow the introduction or removal of the hollow body 2 relative to the device.
  • the hollow body 2 can be brought opposite the device by simple lateral translation by erasing the tube from the supply path of the hollow body. It is thus possible to use, to ensure the positioning of the hollow body, transfer systems known per se, such as mechanisms with transfer clamps, mounted on articulated arms, or mechanisms with wheels or trays of transfer comprising notches or cavities for guiding the hollow bodies.
  • the introduction of the hollow body is carried out by subjecting it to an axial translation, the tube 3 remaining fixed.
  • only the tube 3 is sliding. It therefore slides relative to the hollow body, and to the generator 1 during the establishment or removal of the hollow body.
  • the tube 3 and the generator 1 which are axially translated when the hollow body 2 is placed or removed.
  • the opening 4 of the hollow body 2 is placed opposite the outlet of the generator 1, without however coming into contact with it.
  • the device when the drying takes place during a sterilization process, the device is maintained in an atmosphere of sterile overpressure air to prevent additional particles or dust from entering. in the hollow bodies to be sterilized.
  • known means are used, such as an isolation chamber under laminar flow of sterile air in which the device is installed.
  • drying agent is generated by the generator 1.
  • the suction generated by the suction means 7 through the tube 3 emerging (at 5) near the bottom of the hollow body 2 creates a driving current of the drying agent which is then directed inside the hollow body (arrows 9) and dries the internal surface of the hollow body.
  • the drying agent used can be a dry gas, a desiccant, or even heat.
  • aspiration is that it not only allows the agent to be entrained on all of the walls, but also allows it to be removed when it is a desiccant.
  • the drying is carried out using heat: this is particularly advantageous when the drying occurs during a sterilization process.
  • the generator 1 is a heat generator: it can be constituted by a hot air nozzle at high temperature or by a burner. The heat or the flame is directed towards the orifice 4 and simultaneously a suction is created in the hollow body to channel the flame or the heat towards the walls.
  • a flame or a hot air generator is not contraindicated for drying hollow bodies made of heat-sensitive material, such as containers or preforms of containers made of thermoplastic material. Indeed, the time of exposure to heat is very short. Given the thermal inertia of the material, the hot air directed only has a function of sweeping or drying the hollow body.
  • the hollow body to be dried is made of heat-sensitive material, it is preferable to provide means to prevent direct transfer between the outlet of the heat generator 1 (nozzle or burner) and the hollow body 2.
  • FIG. 2 illustrates a possible embodiment of a device comprising means for preventing direct transfer.
  • the means comprise a casing 10, made of heat-resistant material, cylindrical in the example illustrated, and open at one of its ends.
  • the open end of the casing 10 faces the opening of the hollow body 2, here a container such as a bottle, without however coming into contact with it, on the one hand, to avoid deterioration of the hollow body when it is made of heat-sensitive material and, on the other hand, allow good circulation of heat. Tests have shown that a spacing of between 0.1 mm and 5 mm makes it possible to obtain good results.
  • an orifice 11 is formed in the wall of the casing 10, and the outlet of the generator 1 is directed towards this orifice.
  • the tube 3 is straight and passes through a wall of the casing 10, for example that opposite the opening opposite the hollow body.
  • the tube could be bent and pass through the cylindrical wall.
  • the casing 10 contributes to causing a directive effect on the agent.
  • the plate is extended by a peripheral rim more broadly covering the opening of the hollow body.
  • the drying phase of the hollow body is carried out in two stages: a first where the drying agent (flame, or hot air, or other), is directed towards the hollow body, the suction being active; and a second where the suction continues while the agent is no longer applied, so that all the residues of wetting product and agent, be it gas, heat, or product desiccant, be evacuated at best.
  • the drying agent flame, or hot air, or other
  • FIG 3 there is illustrated a block diagram of the invention, when applied to body drying hollows open at two of their ends. This is for example the case of various tubes or conduits.
  • the suction is carried out not using a tube passing through the hollow body 13, and opening at the end 14 of the hollow body opposite to that 15 near which the generator 1 is located and, from preferably, the housing 10,11,12, as shown: it is produced using a tube 16 located at the open end 14 of the hollow body opposite that 13 near which the generator 1 and the housing are located 10.
  • the tube 16 is connected to suction means 17.
  • the devices described in Figures 1, 2, 3 can be part of a larger treatment facility. They may for example be downstream or upstream of a machine for manufacturing hollow bodies such as tubes or containers which should be dried following, for example, a cleaning or sterilization operation, or hollow bodies after their manufacture, either of preforms or blanks of hollow bodies before their manufacture.
  • They may also be present upstream of filling installations, or also of manufacturing / filling installations, when the hollow bodies are containers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The invention concerns a method and a device for drying a hollow body (2), such as containers, container preforms, tubes or various conduits. The invention is characterized in that it consists in guiding (9) a drying agent (heat, dessicant, dry air . . . ) towards the assembly of surfaces to be dried, using means enabling said agent to pass entirely over all said surfaces.

Description

Procédé pour le séchage de corps creux et dispositif pour la mise en oeuyre.Process for the drying of hollow bodies and device for the implementation.
L'invention concerne un procédé pour le séchage de corps creux. Elle s'applique tout particulièrement, quoique non exclusivement, au séchage de récipients entre leur fabrication et leur remplissage, ou bien encore au séchage de préformes ou d'ébauches de récipients lors de processus de fabrication de récipients. Elle concerne encore un dispositif pour la mise en oeuvre du procédé.The invention relates to a method for drying hollow bodies. It applies very particularly, although not exclusively, to the drying of containers between their manufacture and their filling, or even to the drying of preforms or blanks of containers during the container manufacturing process. It also relates to a device for implementing the method.
Par séchage, au sens de la présente invention, il faut entendre une procédure tendant à faire disparaître des traces ou un faible volume de liquide subsistant à l'intérieur ou sur les parois d'un corps creux. Le séchage est donc une opération qui peut suivre par exemple l'égouttage ou le vidage d'un corps creux après une opération de nettoyage de rinçage, ou de stérilisation, ayant nécessité le remplissage préalable du corps creux; il peut s'agir encore de supprimer les résidus ou traces d'un agent de stérilisation ou de tout autre agent de traitement préalablement déposé sur les parois externes ou internes du corps creux.By drying, within the meaning of the present invention, is meant a procedure for removing traces or a small volume of liquid remaining inside or on the walls of a hollow body. Drying is therefore an operation which can follow, for example, the draining or emptying of a hollow body after a cleaning, rinsing or sterilization operation, having required the prior filling of the hollow body; it may also be a question of removing the residues or traces of a sterilization agent or of any other treatment agent previously deposited on the external or internal walls of the hollow body.
Des applications toutes particulières de l'invention sont :Very particular applications of the invention are:
- le séchage de récipients ayant subi l'un des traitements susmentionnés entre leur fabrication et leur remplissage, tels que, par exemple, un nettoyage, un rinçage, une stérilisation entre la sortie de la chaîne de fabrication et l'entrée de la chaîne de remplissage, ou bien encore un nettoyage, un rinçage ou une stérilisation après une première utilisation, en vue d'une utilisation ultérieure;- the drying of containers having undergone one of the abovementioned treatments between their manufacture and their filling, such as, for example, cleaning, rinsing, sterilization between the exit from the production line and the entry from the filling, or even cleaning, rinsing or sterilization after a first use, for later use;
- le séchage de préformes de récipients en matière plastique (PET, PEN, ... ) immédiatement avant leur introduction dans une machine de fabrication de récipients stériles;- drying preforms of plastic containers (PET, PEN, ...) immediately before their introduction into a machine for manufacturing sterile containers;
- le séchage de tubes ou conduits divers. Bien entendu, les exemples mentionnés ci-avant ne sont pas limitatifs, mais donnent simplement un aperçu du champ d'application possible de l'invention.- drying of various tubes or conduits. Of course, the examples mentioned above are not limiting, but simply give an overview of the possible scope of the invention.
Les procédés de séchage et les dispositifs correspondants connus jusqu'alors ne sont pas adaptés en ce sens qu'ils ne permettent pas d'assurer une répartition de l'agent de séchage sur l'ensemble de la surface interne, encore appelée paroi intérieure, du corps creux lorsque c'est essentiellement cette surface qui doit être séchée; par ailleurs, les dispositifs connus ne sont pas "universels" en ce sens qu'ils ne permettent pas le traitement de corps creux ayant des formes distinctes les uns des autres, ou bien encore qu'ils ne sont pas adaptés au traitement de tout type de matière.The drying methods and the corresponding devices known hitherto are not suitable in the sense that they do not make it possible to ensure a distribution of the drying agent over the entire internal surface, also called the internal wall, of the hollow body when it is essentially this surface which must be dried; moreover, the known devices are not "universal" in the sense that they do not allow the treatment of hollow bodies having distinct shapes from each other, or even that they are not suitable for treatment of any type matter.
Une solution connue pour sécher des corps creux consiste à chauffer ces derniers afin d'évaporer le restant de liquide qui s'y trouve.A known solution for drying hollow bodies consists in heating them in order to evaporate the remaining liquid therein.
Cette solution n'est pas adaptée au séchage de récipients en matière thermosensible, tels que les récipients ou leurs préformes en matière plastique polymère (PET, PEN, ...) car la température requise pour parvenir à 1 'évaporation est suceptible de provoquer une détérioration (déformation, modification des propriétés physico-chimiques) des récipients .This solution is not suitable for drying containers made of heat-sensitive material, such as containers or their preforms made of polymeric plastic material (PET, PEN, etc.) because the temperature required to achieve evaporation is likely to cause deterioration (deformation, modification of the physico-chemical properties) of the containers.
Par ailleurs, elle n'est pas adaptée à des cadences élevées de traitement.Furthermore, it is not suitable for high processing rates.
Une autre solution consiste à insuffler de l'air chaud dans les corps creux.Another solution is to blow hot air into the hollow bodies.
Cette solution ne permet pas d'obtenir un séchage correct avec de fortes cadences, d'une part; elle n'est pas adaptée à certaines formes de corps creux, d'autre part.This solution does not make it possible to obtain correct drying with high rates, on the one hand; on the other hand, it is not suitable for certain forms of hollow body.
En effet, il n'est pas possible d'obtenir un séchage correct et rapide, car l'insufflation d'air chaud entraîne l'apparition de noeuds et de ventres de compression dans le corps creux avec, pour conséquence, des phénomènes turbulents s 'opposant à un balayage correct, donc à un séchage correct, de l'intérieur du corps creux. En conséquence, il faut que le flux d'air chaud soit appliqué pendant une durée importante pour que l'ensemble des surfaces à sécher ait été balayé. Cette solution est donc difficilement applicable à certains types de matières thermosensibles puisque certaines zones vont être exposées pendant un temps significatif au flux d'air chaud, ce qui risque de provoquer leur détérioration.Indeed, it is not possible to obtain a correct and rapid drying, because the blowing of hot air causes the appearance of knots and compression bellies in the hollow body with, as a consequence, turbulent phenomena opposing a correct sweeping, therefore a correct drying, of the interior of the hollow body. Consequently, the flow of hot air must be applied for a significant period of time so that all of the surfaces to be dried have been swept. This solution is therefore difficult to apply to certain types of heat-sensitive materials since certain zones will be exposed for a significant time to the flow of hot air, which risks causing them to deteriorate.
Cette solution n'est pas adaptée au séchage de corps creux ayant des formes particulières telles que les bouteilles ou les flacons.This solution is not suitable for drying hollow bodies having particular shapes such as bottles or flasks.
En effet, le flux d'air chaud est insufflé par l'ouverture (le col) du corps creux qui est de faible diamètre par rapport aux autres parties du corps creux. Les phénomènes précités (noeuds et ventres de compression) sont amplifiés et il est très difficile de sécher l'intérieur de l'épaule de ces corps creux, c'est-à-dire la partie s 'évasant entre le goulot et le corps.Indeed, the flow of hot air is blown through the opening (the neck) of the hollow body which is of small diameter compared to the other parts of the hollow body. The aforementioned phenomena (knots and bellies of compression) are amplified and it is very difficult to dry the inside of the shoulder of these hollow bodies, that is to say the part flaring between the neck and the body.
L'invention a donc pour objet un procédé et un dispositif qui ne présentent pas l'un ou l'autre les inconvénients précités, à savoir qui permettent : un séchage de l'ensemble de la surface; une possibilité d'application, sans modification notable du dispositif, en cas de changement de corps creux à sécher; une application à tout type de corps creux (bouteilles, pots, flacons, vasques, tubes...); une application à tout type de matériau.The subject of the invention is therefore a method and a device which do not have either of the aforementioned drawbacks, namely which allow: drying of the entire surface; a possibility of application, without significant modification of the device, in the event of a change of hollow body to be dried; an application to any type of hollow body (bottles, jars, flasks, basins, tubes ...); an application to any type of material.
Selon l'invention, un procédé pour sécher des corps creux, notamment des récipients ou des préformes de récipients, est caractérisé en ce qu'il consiste à provoquer un courant gazeux d'entraînement d'un agent de séchage vers l'ensemble des surfaces afin de le répartir sur la totalité desdites surfaces. Ainsi, en entraînant, c'est-à-dire en guidant l'agent sur les surfaces, on en obtient une répartition correcte contrairement aux dispositifs où on projette ou insuffle l'agent à l'intérieur. Un simple entraînement de l'agent, après son introduction, rend le procédé utilisable avec tout type de matériau; comme il sera expliqué plus loin, le procédé peut être mis en oeuvre avec un dispositif relativement simple utilisable pour tout type de corps creux quelles que soient leurs formes ou dimensions, et sans qu'il y ait besoin de le modifier notablement lorsque la forme et/ou les dimensions du corps sont changées.According to the invention, a method for drying hollow bodies, in particular containers or container preforms, is characterized in that it consists in causing a gaseous current to entrain a drying agent towards all of the surfaces in order to distribute it over all of said surfaces. Thus, by driving, that is to say by guiding the agent on the surfaces, one obtains a correct distribution of it unlike the devices where the agent is projected or blown inside. A simple entrainment of the agent, after its introduction, makes the process usable with any type of material; as will be explained below, the method can be implemented with a relatively simple device usable for any type of hollow body whatever their shape or size, and without there being any need to modify it notably when the shape and / or the dimensions of the body are changed.
Un autre avantage est que l'entraînement de l'agent par un courant d'entraînement gazeux permet de réaliser le séchage quelle que soit la disposition du corps creux, c'est-à-dire quelle que soit la position de son ouverture (haut, bas ou autre) .Another advantage is that the entrainment of the agent by a gaseous entrainment current makes it possible to carry out the drying whatever the arrangement of the hollow body, that is to say whatever the position of its opening (top , low or other).
Selon une autre caractéristique, l'introduction de l'agent est provoquée par l'extérieur du corps creux, à proximité de son ouverture, et le courant d'entraînement est réalisé en provoquant une aspiration de l'agent à l'aide de moyens d'aspiration agissant à l'opposé de l'ouverture dans le corps creux.According to another characteristic, the introduction of the agent is caused by the exterior of the hollow body, close to its opening, and the drive current is produced by causing the agent to be aspirated by means suction acting opposite the opening in the hollow body.
D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description qui suit, faite en regard des figures annexées, sur lesquelles :Other characteristics and advantages of the invention will appear on reading the description which follows, given with reference to the appended figures, in which:
la figure 1 est un schéma de principe d'un dispositif pour sécher des corps creux conformément à 1 ' invention;Figure 1 is a block diagram of a device for drying hollow bodies according to one invention;
la figure 2 est un schéma de principe d'un dispositif préféré;Figure 2 is a block diagram of a preferred device;
la figure 3 est un schéma d'une variante des dispositifs des figures 1 et 2 applicable au séchage de tubes ou de conduits. Le dispositif représenté à la figure 1 comporte un générateur 1 d'agent de séchage.Figure 3 is a diagram of a variant of the devices of Figures 1 and 2 applicable to the drying of tubes or conduits. The device shown in Figure 1 includes a generator 1 of drying agent.
L'agent de séchage peut être un gaz sec ou chaud, tel que de l'air, ou tout autre agent adapté (produit dessicant par exemple) .The drying agent can be a dry or hot gas, such as air, or any other suitable agent (desiccant, for example).
Dans une mise en oeuvre, où l'agent est de l'air chaud, le générateur 1 est un générateur d'air chaud à haute température .In one implementation, where the agent is hot air, the generator 1 is a generator of hot air at high temperature.
Dans une mise en oeuvre préférée, l'agent de séchage est une flamme et le générateur 1 est alors un brûleur.In a preferred implementation, the drying agent is a flame and the generator 1 is then a burner.
D'autres variantes sont bien entendu à la portée de l'homme du métier, sans qu'il soit besoin de les détailler davantage.Other variants are of course within the reach of the skilled person, without the need to detail them further.
Comme illustré sur la figure 1, le générateur 1 est disposé à l'extérieur du corps creux 2 (ici une préforme de récipient), à proximité de l'ouverture de ce dernier, et la sortie du générateur est orientée de façon que l'agent puisse être dirigé vers l'intérieur du corps creux.As illustrated in FIG. 1, the generator 1 is arranged outside the hollow body 2 (here a container preform), near the opening of the latter, and the generator outlet is oriented so that the agent can be directed into the interior of the hollow body.
Conformément à l'exemple illustré sur la figure 1 où le corps creux 2 est du type ouvert à une seule de ses extrémités (récipient, préforme de récipient par exemple) , un tube 3 est introduit dans le corps creux par son ouverture 4. Une extrémité 5 du tube est à proximité d'une zone du corps creux distale de l'ouverture (la zone de fond dans le cas d'un récipient); l'autre extrémité du tube est située hors du récipient et est reliée soit directement, soit par le biais d'un conduit 6 à une source d'aspiration 7.In accordance with the example illustrated in FIG. 1 where the hollow body 2 is of the type open at only one of its ends (container, container preform for example), a tube 3 is introduced into the hollow body through its opening 4. A end 5 of the tube is near an area of the hollow body distal to the opening (the bottom area in the case of a container); the other end of the tube is located outside the container and is connected either directly or via a conduit 6 to a suction source 7.
De préférence, comme illustré sur la figure, l'axe longitudinal du tube 3 est aligné sur celui du corps creux.Preferably, as illustrated in the figure, the longitudinal axis of the tube 3 is aligned with that of the hollow body.
Par ailleurs, la section extérieure du tube est sensiblement inférieure à la section intérieure de 1 ' ouverture du corps creux pour que 1 ' agent de séchage puisse pénétrer dans le corps creux par l'espace périphérique subsistant entre le tube et l'ouverture du corps creux.Furthermore, the outside section of the tube is substantially smaller than the inside section of the opening of the hollow body so that the drying agent can enter the hollow body through the peripheral space remaining between the tube and the opening of the hollow body.
Pour la mise en place ou le retrait du corps creux 2 relativement au dispositif, il est prévu des moyens permettant un déplacement axial relatif entre le corps creux 2 et au moins le tube 3.For the establishment or removal of the hollow body 2 relative to the device, means are provided allowing relative axial displacement between the hollow body 2 and at least the tube 3.
Ainsi, dans une mise en oeuvre, au moins le tube 3 est coulissant dans le sens axial (double flèche 8) pour permettre la mise en place ou le retrait du corps creux 2 relativement au dispositif. Ainsi, le corps creux 2 peut être amené en regard du dispositif par simple translation latérale en effaçant le tube du trajet d'amenée du corps creux. Il est ainsi possible d'utiliser, pour assurer la mise en place du corps creux, des systèmes de transfert connus en soi, tels que des mécanismes à pinces de transfert, montés sur des bras articulés, ou encore des mécanismes à roues ou plateaux de transfert comportant des encoches ou alvéoles de guidage des corps creux.Thus, in one implementation, at least the tube 3 is sliding in the axial direction (double arrow 8) to allow the introduction or removal of the hollow body 2 relative to the device. Thus, the hollow body 2 can be brought opposite the device by simple lateral translation by erasing the tube from the supply path of the hollow body. It is thus possible to use, to ensure the positioning of the hollow body, transfer systems known per se, such as mechanisms with transfer clamps, mounted on articulated arms, or mechanisms with wheels or trays of transfer comprising notches or cavities for guiding the hollow bodies.
Alternativement, il est envisagé que la mise en place du corps creux s'effectue en lui faisant subir une translation axiale, le tube 3 restant fixe.Alternatively, it is envisaged that the introduction of the hollow body is carried out by subjecting it to an axial translation, the tube 3 remaining fixed.
Dans une variante, seul le tube 3 est coulissant. Il coulisse donc relativement au corps creux, et au générateur 1 lors de la mise en place ou du retrait du corps creux.In a variant, only the tube 3 is sliding. It therefore slides relative to the hollow body, and to the generator 1 during the establishment or removal of the hollow body.
Dans une variante, c'est le tube 3 et le générateur 1 qui sont translatés axialement lors de la mise en place ou du retrait du corps creux 2.In a variant, it is the tube 3 and the generator 1 which are axially translated when the hollow body 2 is placed or removed.
L'ouverture 4 du corps creux 2 est placée en regard de la sortie du générateur 1, sans toutefois venir à son contact.The opening 4 of the hollow body 2 is placed opposite the outlet of the generator 1, without however coming into contact with it.
De préférence, lorsque le séchage a lieu lors d'un processus de stérilisation, le dispositif est maintenu dans une ambiance d'air stérile en surpression pour éviter que des particules ou poussières supplémentaires ne pénètrent dans les corps creux à stériliser. Pour cela, des moyens connus sont utilisés, tels qu'une chambre d'isolation sous flux laminaire d'air stérile dans laquelle est installé le dispositif.Preferably, when the drying takes place during a sterilization process, the device is maintained in an atmosphere of sterile overpressure air to prevent additional particles or dust from entering. in the hollow bodies to be sterilized. For this, known means are used, such as an isolation chamber under laminar flow of sterile air in which the device is installed.
Après que le dispositif (tube 3, générateur 1) et le corps creux 2 ont été mis en position relative correcte l'un par rapport à l'autre, de l'agent de séchage est généré par le générateur 1. L'aspiration engendrée par les moyens 7 d'aspiration au travers du tube 3 débouchant (en 5) à proximité du fond du corps creux 2 crée un courant d'entraînement de l'agent de séchage qui est alors dirigé à l'intérieur du corps creux (flèches 9) et assèche la surface interne du corps creux.After the device (tube 3, generator 1) and the hollow body 2 have been placed in the correct relative position with respect to each other, drying agent is generated by the generator 1. The suction generated by the suction means 7 through the tube 3 emerging (at 5) near the bottom of the hollow body 2 creates a driving current of the drying agent which is then directed inside the hollow body (arrows 9) and dries the internal surface of the hollow body.
Comme déjà mentionné, l'agent de séchage employé peut être un gaz sec, un produit dessicant, ou encore de la chaleur.As already mentioned, the drying agent used can be a dry gas, a desiccant, or even heat.
L'avantage de l'aspiration est qu'elle permet non seulement l'entraînement de l'agent sur l'ensemble des parois, mais qu'elle permet aussi son retrait lorsqu'il s'agit d'un produit dessicant.The advantage of aspiration is that it not only allows the agent to be entrained on all of the walls, but also allows it to be removed when it is a desiccant.
Cependant, de préférence, le séchage s'effectue en utilisant de la chaleur : ceci est particulièrement avantageux lorsque le séchage apparaît lors d'un processus de stérilisation.Preferably, however, the drying is carried out using heat: this is particularly advantageous when the drying occurs during a sterilization process.
Dans ce cas, le générateur 1 est un générateur de chaleur: il peut être constitué par une buse d'air chaud à haute température ou par un brûleur. La chaleur ou la flamme est dirigée vers l'orifice 4 et simultanément une aspiration est créée dans le corps creux pour canaliser la flamme ou la chaleur vers les parois.In this case, the generator 1 is a heat generator: it can be constituted by a hot air nozzle at high temperature or by a burner. The heat or the flame is directed towards the orifice 4 and simultaneously a suction is created in the hollow body to channel the flame or the heat towards the walls.
L'emploi d'une flamme ou d'un générateur d'air chaud n'est pas contre-indiqué pour le séchage de corps creux en matière thermosensible, tels que des récipients ou des préformes de récipients en matière thermoplastique. En effet, le temps d'exposition à la chaleur est très faible. Compte tenu de l'inertie thermique du matériau, l'air chaud dirigé a uniquement une fonction de balayage ou de séchage du corps creux.The use of a flame or a hot air generator is not contraindicated for drying hollow bodies made of heat-sensitive material, such as containers or preforms of containers made of thermoplastic material. Indeed, the time of exposure to heat is very short. Given the thermal inertia of the material, the hot air directed only has a function of sweeping or drying the hollow body.
Toutefois, lorsque le corps creux à sécher est en matière thermosensible, il est préférable de prévoir des moyens pour empêcher un transfert direct entre la sortie du générateur 1 de chaleur (buse ou brûleur) et le corps creux 2.However, when the hollow body to be dried is made of heat-sensitive material, it is preferable to provide means to prevent direct transfer between the outlet of the heat generator 1 (nozzle or burner) and the hollow body 2.
La figure 2 illustre un mode de réalisation possible d'un dispositif comportant des moyens pour empêcher le transfert direct .FIG. 2 illustrates a possible embodiment of a device comprising means for preventing direct transfer.
Les moyens comportent un carter 10, en matériau résistant à la chaleur, cylindrique dans l'exemple illustré, et ouvert à l'une de ses extrémités. L'extrémité ouverte du carter 10 est en regard de l'ouverture du corps creux 2, ici un récipient tel qu'une bouteille, sans toutefois venir à son contact, pour, d'une part, éviter une détérioration du corps creux lorsqu'il est en matériau thermosensible et, d'autre part, permettre une bonne circulation de la chaleur. Des essais ont montré qu'un écartement compris entre 0,1 mm et 5 mm permettaient d'obtenir de bons résultats .The means comprise a casing 10, made of heat-resistant material, cylindrical in the example illustrated, and open at one of its ends. The open end of the casing 10 faces the opening of the hollow body 2, here a container such as a bottle, without however coming into contact with it, on the one hand, to avoid deterioration of the hollow body when it is made of heat-sensitive material and, on the other hand, allow good circulation of heat. Tests have shown that a spacing of between 0.1 mm and 5 mm makes it possible to obtain good results.
Par ailleurs, un orifice 11 est ménagé dans la paroi du carter 10, et la sortie du générateur 1 est dirigée vers cet orifice.Furthermore, an orifice 11 is formed in the wall of the casing 10, and the outlet of the generator 1 is directed towards this orifice.
Comme montré sur cette figure 2, le tube 3 est droit et traverse une paroi du carter 10, par exemple celle opposée à l'ouverture en regard du corps creux.As shown in this FIG. 2, the tube 3 is straight and passes through a wall of the casing 10, for example that opposite the opening opposite the hollow body.
Dans une variante, le tube pourrait être coudé et traverser la paroi cylindrique.Alternatively, the tube could be bent and pass through the cylindrical wall.
Lorsque le dispositif est en fonctionnement, la chaleur est dirigée vers le corps creux, non pas directement, mais en transitant par le carter 10. Les essais effectués ont par ailleurs mis en évidence que l'emploi d'un dispositif conforme à celui de la figure 2, est d'un meilleur rendement que celui de la figure 1 où l'agent (chaleur ou autre) est dirigé directement vers le corps creux.When the device is in operation, the heat is directed towards the hollow body, not directly, but passing through the casing 10. The tests carried out have moreover demonstrated that the use of a device conforming to that of FIG. 2 is of better efficiency than that of FIG. 1 where the agent (heat or other) is directed directly towards the hollow body.
En effet, le carter 10 contribue à provoquer un effet directif sur l'agent.In fact, the casing 10 contributes to causing a directive effect on the agent.
Cette variante constitue donc un mode de réalisation préféré .This variant therefore constitutes a preferred embodiment.
En outre, lorsque l'agent est de la chaleur, il est souhaitable de prévoir des moyens complémentaires de protection de l'ouverture du corps creux, tels qu'une plaque 12 de protection de l'ouverture du corps creux entourant au moins partiellement le carter 11 et disposée entre l'orifice 11 de passage de l'air chaud ou de la flamme et l'ouverture du carter 10 côté corps creux 2, comme visible sur cette figure 2.In addition, when the agent is heat, it is desirable to provide additional means for protecting the opening of the hollow body, such as a plate 12 for protecting the opening of the hollow body at least partially surrounding the casing 11 and disposed between the orifice 11 for passage of the hot air or the flame and the opening of the casing 10 on the hollow body side 2, as visible in this FIG. 2.
De préférence, comme illustré, la plaque est prolongée par un rebord périphérique coiffant plus largement l'ouverture du corps creux.Preferably, as illustrated, the plate is extended by a peripheral rim more broadly covering the opening of the hollow body.
De préférence, la phase de séchage du corps creux s'effectue en deux étapes : une première où l'agent de séchage (flamme, ou air chaud, ou autre) , est dirigé vers le corps creux, l'aspiration étant active; et une seconde où l'aspiration continue alors que l'agent n'est plus appliqué, de façon à ce que tous les résidus de produit mouillant et d'agent, qu'il s'agisse de gaz, de chaleur, ou de produit dessicant, soient évacués au mieux.Preferably, the drying phase of the hollow body is carried out in two stages: a first where the drying agent (flame, or hot air, or other), is directed towards the hollow body, the suction being active; and a second where the suction continues while the agent is no longer applied, so that all the residues of wetting product and agent, be it gas, heat, or product desiccant, be evacuated at best.
A titre indicatif, on parvient à assécher des préformes de récipients en matière thermoplastique en appliquant une flamme pendant 1 à 3 secondes à l'orifice 11 et en continuant l'aspiration entre 2 et 6 secondes.As an indication, it is possible to dry out preforms of containers made of thermoplastic material by applying a flame for 1 to 3 seconds at the orifice 11 and continuing the suction between 2 and 6 seconds.
Sur la figure 3, on a illustré un schéma de principe de l'invention, lorsqu'elle est appliquée au séchage de corps creux ouverts à deux de leurs extrémités. C'est par exemple le cas de tubes ou de conduits divers.In Figure 3, there is illustrated a block diagram of the invention, when applied to body drying hollows open at two of their ends. This is for example the case of various tubes or conduits.
Dans ce cas, l'aspiration est réalisée non pas à l'aide d'un tube traversant le corps creux 13, et débouchant à l'extrémité 14 du corps creux opposée à celle 15 près de laquelle se trouve le générateur 1 et, de préférence, le carter 10,11,12, comme représenté : elle est réalisée à l'aide d'un tube 16 situé à l'extrémité 14 ouverte du corps creux opposée à celle 13 près de laquelle se trouve le générateur 1 et le carter 10. Le tube 16 est connecté à des moyens d'aspiration 17.In this case, the suction is carried out not using a tube passing through the hollow body 13, and opening at the end 14 of the hollow body opposite to that 15 near which the generator 1 is located and, from preferably, the housing 10,11,12, as shown: it is produced using a tube 16 located at the open end 14 of the hollow body opposite that 13 near which the generator 1 and the housing are located 10. The tube 16 is connected to suction means 17.
Les dispositifs décrits aux figures 1, 2, 3 peuvent faire partie d'une installation plus vaste de traitement. Ils peuvent être par exemple en aval ou en amont d'une machine de fabrication de corps creux tels que des tubes ou des récipients qu'il convient de sécher suite par exemple à une opération de nettoyage ou de stérilisation, soit de corps creux après leur fabrication, soit de préformes ou ébauches de corps creux avant leur fabrication.The devices described in Figures 1, 2, 3 can be part of a larger treatment facility. They may for example be downstream or upstream of a machine for manufacturing hollow bodies such as tubes or containers which should be dried following, for example, a cleaning or sterilization operation, or hollow bodies after their manufacture, either of preforms or blanks of hollow bodies before their manufacture.
Ils peuvent encore être présents en amont d'installations de remplissage, ou encore d'installations de fabrication / remplissage, lorsque les corps creux sont des récipients.They may also be present upstream of filling installations, or also of manufacturing / filling installations, when the hollow bodies are containers.
Bien entendu, l'invention n'est pas limitée aux seuls modes de réalisation et d'application décrits. Elle en embrasse tous les équivalents et variantes de réalisation ou d'application possibles. Of course, the invention is not limited only to the embodiments and applications described. It embraces all possible equivalents and variants of implementation or application.

Claims

REVENDICATIONS
1 - Procédé pour sécher des corps creux (9) , du genre consistant à mettre en contact avec les surfaces à sécher un agent de séchage, et du genre consistant à provoquer un courant gazeux d'entraînement de l'agent vers l'ensemble des surfaces à sécher afin de répartir l'agent sur la totalité desdites surfaces, caractérisé en ce que l'agent de séchage est une flamme injectée par un brûleur et entraînée par aspiration à l'intérieur du corps creux, à l'aide de moyens d'aspiration agissant dans ce dernier, à l'opposé de son ouverture.1 - Method for drying hollow bodies (9), of the type consisting in bringing a drying agent into contact with the surfaces to be dried, and of the type consisting in causing a gaseous current entraining the agent towards all of the surfaces to be dried in order to distribute the agent over all of said surfaces, characterized in that the drying agent is a flame injected by a burner and drawn by suction inside the hollow body, by means of means suction acting in the latter, opposite to its opening.
2 - Procédé selon la revendication 1, caractérisé en ce que le séchage comporte deux étapes: une première où la flamme est dirigée vers le corps creux, l'aspiration étant active, et une seconde où l'aspiration continue alors que la flamme n'est plus appliquée.2 - Method according to claim 1, characterized in that the drying comprises two stages: a first where the flame is directed towards the hollow body, the suction being active, and a second where the suction continues while the flame does is no longer applied.
3 - Procédé selon la revendication 2, caractérisée en ce que la flamme est appliquée pendant 1 à 3 secondes.3 - Method according to claim 2, characterized in that the flame is applied for 1 to 3 seconds.
4 - Procédé selon l'une des revendications 2 ou 3, caractérisé en ce que l'aspiration continue pendant 2 à 6 secondes.4 - Method according to one of claims 2 or 3, characterized in that the suction continues for 2 to 6 seconds.
5 - Dispositif pour la mise en oeuvre du procédé selon l'une des revendications 1 a 4, caractérisé en ce qu'il comporte des moyens (1) de génération d'une flamme, des moyens (3, 6, 7; 16, 17) pour provoquer un courant gazeux d'entraînement de l'agent vaporisé vers les surfaces intérieures d'un corps creux (2; 13) lorsque ce dernier est en place relativement au dispositif.5 - Device for implementing the method according to one of claims 1 to 4, characterized in that it comprises means (1) for generating a flame, means (3, 6, 7; 16, 17) to cause a gaseous current of entrainment of the vaporized agent towards the interior surfaces of a hollow body (2; 13) when the latter is in place relative to the device.
6 - Dispositif selon la revendication 5, caractérisé en ce qu'il comporte un carter (10) disposé à l'extérieur du corps creux (2; 13) à proximité de l'ouverture de ce dernier, et pourvu : d'une ouverture (11) en regard de la sortie des moyens (1) de génération de l'agent de séchage; d'une extrémité ouverte ayant une forme et des dimensions intérieures correspondant sensiblement à celles de l'ouverture intérieure du corps creux.6 - Device according to claim 5, characterized in that it comprises a casing (10) disposed outside the hollow body (2; 13) near the opening of the latter, and provided with: an opening (11) opposite the outlet of the means (1) for generating the drying agent; of an open end having a shape and dimensions interior corresponding substantially to those of the interior opening of the hollow body.
7 - Dispositif selon l'une des revendications 5 ou 6 caractérisé en ce que les moyens pour provoquer le courant gazeux sont constitués par un tube (3; 16) relié à une source d'aspiration (7;17).7 - Device according to one of claims 5 or 6 characterized in that the means for causing the gas current consist of a tube (3; 16) connected to a suction source (7; 17).
8 - Dispositif selon la revendication 7, caractérisé en ce que le corps creux étant en forme de récipient, c'est-à- dire ouvert à l'une de ses extrémités et fermé à l'autre, le tube (3) est introduit par l'ouverture du corps creux; le tube possède une extrémité débouchant à proximité du fond du corps creux, et sa seconde extrémité, à l'extérieur du corps creux, est reliée à la source d'aspiration (7).8 - Device according to claim 7, characterized in that the hollow body being container-shaped, that is to say open at one of its ends and closed at the other, the tube (3) is introduced by the opening of the hollow body; the tube has one end opening near the bottom of the hollow body, and its second end, outside the hollow body, is connected to the suction source (7).
9 - Dispositif selon la revendication 8, caractérisé en ce que le tube (3) traverse une paroi du carter (10) .9 - Device according to claim 8, characterized in that the tube (3) passes through a wall of the housing (10).
10 - Dispositif selon la revendication 7, caractérisé en ce que le corps creux (13) étant un tube ou un conduit ouvert à deux extrémités opposées, l'aspiration est effectuée en disposant le tube (16) d'aspiration à l'extrémité (14) du corps creux opposée à celle (15) où s'effectue l'introduction d'agent de séchage.10 - Device according to claim 7, characterized in that the hollow body (13) being a tube or a duct open at two opposite ends, the suction is carried out by placing the suction tube (16) at the end ( 14) of the hollow body opposite to that (15) where the introduction of drying agent takes place.
11 - Dispositif selon l'une des revendications 5 à 10 caractérisé en ce qu'il est situé dans un flux laminaire de gaz stérile, tel de l'air.11 - Device according to one of claims 5 to 10 characterized in that it is located in a laminar flow of sterile gas, such as air.
12 - Installation de fabrication et/ou de remplissage de corps creux, caractérisée en ce qu'elle comporte un dispositif selon l'une des revendications 5 à 11. 12 - Installation and / or filling installation for hollow bodies, characterized in that it comprises a device according to one of claims 5 to 11.
EP99902601A 1998-02-16 1999-02-04 Method for drying a hollow body and implementing device Expired - Lifetime EP1056980B1 (en)

Applications Claiming Priority (3)

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FR9801938A FR2775064B1 (en) 1998-02-16 1998-02-16 METHOD FOR DRYING HOLLOW BODIES AND DEVICE FOR CARRYING OUT SAID
FR9801938 1998-02-16
PCT/FR1999/000252 WO1999041558A1 (en) 1998-02-16 1999-02-04 Method for drying a hollow body and implementing device

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AU2283899A (en) 1999-08-30
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JP3486611B2 (en) 2004-01-13
ATE239203T1 (en) 2003-05-15
FR2775064B1 (en) 2000-05-05
DE69907422T2 (en) 2004-03-18
DE69907422D1 (en) 2003-06-05
WO1999041558A1 (en) 1999-08-19
US6345452B1 (en) 2002-02-12
FR2775064A1 (en) 1999-08-20

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