EP0914214A1 - Apparatus for coating foods or pharmaceuticals - Google Patents

Apparatus for coating foods or pharmaceuticals

Info

Publication number
EP0914214A1
EP0914214A1 EP97932891A EP97932891A EP0914214A1 EP 0914214 A1 EP0914214 A1 EP 0914214A1 EP 97932891 A EP97932891 A EP 97932891A EP 97932891 A EP97932891 A EP 97932891A EP 0914214 A1 EP0914214 A1 EP 0914214A1
Authority
EP
European Patent Office
Prior art keywords
tank
products
opening
installation according
coating
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.)
Withdrawn
Application number
EP97932891A
Other languages
German (de)
French (fr)
Inventor
Richard Juan
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.)
Ogan
Original Assignee
Ogan
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 Ogan filed Critical Ogan
Publication of EP0914214A1 publication Critical patent/EP0914214A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
    • B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
    • B05B13/0221—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
    • B05B13/025—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts the objects or work being present in bulk
    • B05B13/0257—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts the objects or work being present in bulk in a moving container, e.g. a rotatable foraminous drum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/006—Coating of the granules without description of the process or the device by which the granules are obtained

Definitions

  • the invention relates to the coating of food or pharmaceutical products such as almonds, granules, tablets, with a coating, liquid or powder.
  • the coating is carried out by placing a batch of products, for example tablets, in a machine composed of a rotary tank with horizontal axis provided with internal blades, substantially radial, and by driving this tank in rotation at a speed of the order of three to ten revolutions per minute, at the same time that a ramp with a plurality of nozzles, sprays the coating material in liquid state and a hot air circuit passes through the wall of the vessel to form a fluid bed passing through the mass of the products or tablets, spacing them and bringing them to a temperature favoring their coating and drying.
  • the present invention aims to overcome these disadvantages by providing a multi-purpose facility that can ensure the coating of various products. whatever their dimensions, by means of a liquid or powder coating, while improving productivity and quality, and being able to operate continuously and automatically, therefore without human control.
  • the tank of generally bitronconic shape with inverted cones, has a smooth inner wall and is in sealing contact by its rear edge with a fixed central disc, this disc being traversed , at the top, through an opening connected to one of the branches of the hot air circuit and in the lower part by at least one opening for the passage of at least one rotating mixing member, this member, disposed in the part of the tank receiving the greatest thickness of the products to be treated, being connected to means arranged in a sealed box which, fixed against the back of the central disc, is connected to the other branch of the hot air circuit.
  • the tank is cleared of any blade and other means promoting the mixing of the products to be coated, but hampering cleaning, since this mixing is carried out by one or more mixing members arranged in the mass of products to be treated, and generating, by their rotation, displacement flows which expel the tablets placed inside the mass on the periphery thereof.
  • the two branches of the hot air circuit whether the inlet branch or the outlet branch, pass through the fixed central disk, which rids the tank of all the constraints inherent in these circuits.
  • the branch leading to the chamber communicates with the mixing member which thus forms a sort of windsock working by blowing or suction, as appropriate processing or the nature of the product to be treated.
  • each of the mixing members is connected to means able to move it, in translation and in both directions, between a retracted position, in which it is inside the box, and a working position in which it is out of the box and protrusion within the vessel in the product accumulation area to be coated.
  • FIG. 1 is a side view in longitudinal section.
  • FIG. 2 is a sectional view along II-II of FIG. 1,
  • FIG. 3 is a view, from the rear, along arrow III of FIG. 1,
  • Figure 4 is a partial side view, in longitudinal section, showing, on an enlarged scale, the drive means in translation and in rotation of the mixing members.
  • reference numeral 2 designates, in general, the tank of the installation, as shown in Figure 1, has a dual frustoconical shaped inverted cones, i.e. consists, going from the front to rear, a cylindrical inlet sleeve 3, a frusto-conical front wall 4, whose generatrices converge towards the front, and a rear frustoconical wall 5 whose generatrices converge towards the rear.
  • the apex angle formed by the generatrices of the front wall 4 is between 120 and 160 °, and is here of the order of 140 °, while the apex angle formed by the generatrices of the posterior wall 5 is between 1 and 20 °, and is here of the order of 15 °.
  • the inner wall of the tank 2 is smooth and free of any protrusions.
  • the cylindrical shell 3 constituting the inlet mouth for the products to be coated and the manhole is integral with a ring 6 which is mounted to rotate freely in a rolling bearing 7 of a frame 8.
  • the free rear edge of the rear wall 5 of the tank is integral with a radial flange 9 which is guided in rotation by rollers 10 carried by the above-mentioned frame 8. This flange 9 comes into sealing contact, by means of a suitable seal 12, shown in FIG. 4. with a frustoconical surface 13 formed on the periphery of a central disc 14 carried by the chassis 8.
  • the internal face of this disc is smooth and without roughness.
  • the tank 2 is connected by a movement transmission, not shown, to drive means adapted to drive it in rotation at variable speed, of the order of 3 to 10 revolutions / minute under the control of a control unit with automaton, not shown.
  • the tank 2 is associated with three mixing elements 15 projecting forwardly from the rear wall 14 and arranged, as shown in Figure 2.
  • the bowl 2 area which, upon rotation of the vessel, contains the greater thickness of products to be coated.
  • Figure 2 shows, by the dashed line N, the upper level of the products to be coated when the tank rotates.
  • each mixing member 15 extends longitudinally to the diametral plane D containing the most large diameter of the tank, but it is obvious that it can go forward and come up close to the front tapered wall 4.
  • Each mixer member 15 has a peripheral wall 1 1 ( Figure 4) porous to air.
  • the wall is constituted by a perforated metal sheet or by a textile web supported by an internal frame.
  • FIG. 2 shows that, in cross section, each mixing member 15 has lobed blades forming a cross with four branches, but it is specified that the number of each branch of the crosses, as well as the depth of the interval between branches , depends on the processing conditions and may vary, without departing from the scope of the invention.
  • Each mixer member 15, passing through the central disc 14 by an opening 19, is secured to a nozzle 17 by which it is mounted detachably to the forward end 18 of a cage 20.
  • the tip 17 is provided with a tenon dovetail engaging a complementary section formed in the slide component 18, but it is obvious that any other equivalent connection means may be used .
  • the cage 20 is mounted free in rotation, by bearings 22 or bearings, in a chassis 23 common to the various members 15. This chassis is mounted free in translation on longitudinal slides 24, carried by a box 25. This box is fixed projecting from the rear part of the central disc 14 and, as shown in FIG. 3. envelops the means for translational movement of the mixer members 1 5 that it can contain when they are retracted.
  • the chassis 23 is integral with at least one nut 26 crossed by a threaded rod 27, mounted free in rotation but locked in rotation in a bearing 28 of the frame 8.
  • FIG. 4 shows that each opening 19 made in the central disc 14 for a mixing member 15, can be concealed in a sealed manner. when this member is in the retracted position in the box 25, by a conical bearing 34 formed at the free end of each member 15 and coming into contact with a seal 35 bordering in the corresponding opening 19.
  • the drive in rotation of each cage 20 is ensured by means of a hub 36 linked to the cage, for example by arms 36a.
  • This hub is slidably mounted on a shaft 37 which, of polygonal section, cooperates with its bore of complementary section to ensure its setting in rotation.
  • the shaft 37 is mounted to rotate freely in a bearing 38 of the frame 8 and is connected by a transmission by toothed pulleys 39 and toothed belt 40 to the output shaft of an electric motor 42, this BRUSLESS type motor is common.
  • the three bodies it can therefore lead mixers with variable speeds, and even by blows or reversals of fast direction to generate vibrations under the control of the control cabinet.
  • the mixing members 15 are brought into the tank by displacement of the frame 20 by means of the threaded rod 27. It will be noted that, if these members 15 do not have the appropriate profile or structure, they can be easily replaced from the inlet mouth 3.
  • each of the members 15 is rotated by the common electric motor 42 and by means of the transmission of movements 39, 40, transmission which, as shown in FIG. FIG. 3 comprises intermediate return pulleys 39a communicating to each of the members 15 a direction of rotation opposite to that of its neighbor, as shown by the arrows 41.
  • the mixing members 15 tend to expel the products arranged in the center of the mass towards a higher level or against the lower wall of the tank 2, that is to say tend to stir the products so that none of them stagnates in the center of the mass, which makes it possible to homogenize the circulation flows of these products in the mass, to accelerate the coating, to reduce the manufacturing time, while improving the quality of this coating.
  • the members 15 increases from two to three foix the exchange surface with the hot air stream to promote the maintenance temperature and the coating. Furthermore, thanks to the use of a smooth-walled tank, the coating is facilitated and better gloss can be obtained.
  • the disc 14 is linked to the frame 8 by means making it possible to modify its angular position and that of the chassis 25.
  • FIG. 3 shows that the housing 25 is connected to one of the branches A hot air circuit of which the other branch B opens into the vessel 2 through an opening 50 formed at the upper portion of the central disc 14.
  • FIG. 1 shows that the disc 14 has also an axial opening 52 for the passage of the telescopic rod 53 of the means 54 for spraying the coating fluid and an opening 55 for the passage of the telescopic elements 56 of the means 57 for automatic cleaning of this tank.
  • the chassis of the means 54 and that of the means 57 are fixed to the rear part of the central disc 14 and the free end of the telescopic means 53 or 56 is provided with sealing means, for example of a frustoconical bearing 53a. 56a capable of engaging a complementary bearing surface surrounding the edge of the corresponding opening 52 or 55.
  • the means for spraying the fluid coating are well known to those skilled in the art and need not be described here.
  • the cleaning means 57 can have different forms, and in particular, be similar to those described in French patent application No. 96 08909 in the name of the applicant.
  • the evacuation of the coated products can be carried out in the traditional way, by the inlet mouth 3, but, preferably, it is carried out via an opening 60 formed in the frustoconical anterior wall of the tank 2 and closed by a shutter 62 with automatic control, not shown.
  • the controller of the control unit comprises means for, at the end of coating, to stop the vessel with the opening 60 and the shutter 62 disposed at the point the lower.
  • this facility can be fully automated, both in regard to the filling of the tank, coating products, the management of the coating and hot air flow, emptying, but also cleaning after a certain number of cycles.
  • Such automation not only makes it possible to reduce the labor time allocated to each cycle, but also to multiply by three or five the productivity of such an installation compared to current installations, and, above all, by integrating the automatic cleaning at each change of product types or coating, to remove all risks of cross contamination.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Glanulating (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)

Abstract

An apparatus including a vessel (2) with an axial inlet (3), means for rotating the vessel (2) relative to a frame (8), spray means (53) for spray-coating the material in the lower portion of the vessel (2), a hot air circuit through the material mass, and a control box. The vessel (2) has a generally double frusto-conical shape with inverted cones (4, 5), includes a smooth inner wall and is in sealing contact via its rear edge with a stationary central disc (14) having a through-hole (50) in the upper portion thereof for connection to one of the sections (B) of the hot air circuit, and at least one further through-hole in the lower portion through which a rotary mixing member (15) is inserted. Said member is arranged in the portion of the vessel (2) where the mass of material to be processed is thickest, and is connected to drive means in a sealed housing (25) secured to the back of the central disc (14) and connected to the other section (A) of the hot air circuit.

Description

INSTALLATION POUR L'ENROBAGE DE PRODUITS ALIMENTAIRES OU PLANT FOR COATING FOOD PRODUCTS OR
PHARMACEUTIQUES.PHARMACEUTICALS.
L'invention concerne l'enrobage de produits alimentaires ou pharmaceutiques tels que amandes, granulés, comprimés, par un revêtement, liquide ou pulvérulent.The invention relates to the coating of food or pharmaceutical products such as almonds, granules, tablets, with a coating, liquid or powder.
Traditionnellement, l'enrobage s'effectue en disposant un lot de produits, par exemple de comprimés, dans une machine composée d'une cuve rotative à axe horizontal dotée de pales internes, sensiblement radiales, et en entraînant cette cuve en rotation à une vitesse de l'ordre de trois à dix tours par minute, en même temps qu'une rampe, avec plusieurs buses, pulvérise le produit d'enrobage à l'état liquide et qu'un circuit d'air chaud traverse la paroi de la cuve pour former un lit fluide traversant la masse des produits ou des comprimés, les espaçant et les portant à une température favorisant leur enrobage et leur séchage.Traditionally, the coating is carried out by placing a batch of products, for example tablets, in a machine composed of a rotary tank with horizontal axis provided with internal blades, substantially radial, and by driving this tank in rotation at a speed of the order of three to ten revolutions per minute, at the same time that a ramp with a plurality of nozzles, sprays the coating material in liquid state and a hot air circuit passes through the wall of the vessel to form a fluid bed passing through the mass of the products or tablets, spacing them and bringing them to a temperature favoring their coating and drying.
Pour permettre la circulation d'air chaud, il est d'usage de perforer la paroi de la cuve. Cette perforation présente l'inconvénient de compliquer le nettoyage de la cuve, qui s'effectue en général après enrobage de deux ou trois lots ou après chaque changement de type de lots, mais aussi de limiter l'utilisation de la cuve à l'enrobage de produits ayant une dimension supérieure à celle des perforations. En d'autres termes, ces perforations excluent tout enrobage de granules ayant une dimension diamétrale inférieure à 4 mm, de même que tout enrobage par de la poudre.To allow the circulation of hot air, it is customary to perforate the wall of the tank. This perforation has the disadvantage of complicating the cleaning of the tank, which is generally carried out after coating two or three batches or after each change of type of batches, but also of limiting the use of the tank for coating. of products having a dimension greater than that of the perforations. In other words, these perforations exclude any coating granules having a diametral dimension less than 4 mm, as well as any coating with powder.
Un autre inconvénient de cette technique est inhérent à l'hétérogénéité des flux des produits pendant l'enrobage. En effet, lors de la rotation de la cuve, les produits à enrober, et par exemple des comprimés, roulent sur eux-mêmes en décrivant des trajectoires en boucles fermées d'autant plus longues qu'ils sont près de la surface du lot ou de la paroi de la cuve. Ainsi, les comprimés disposés au milieu du lot décrivent des trajectoires plus courtes et ne changent presque pas de trajectoire. Il en résulte qu'ils viennent moins fréquemment à la surface du lot. sous la rampe de pulvérisation de l'enrobage et que leur enrobage s'effectue, en partie, par prélèvement de l'enrobage des comprimés des couches qui leur sont extérieures. La présence de pales ou d'auges améliore faiblement le transfert des comprimés entre les différents flux ou trajectoires. Pour cette raison, l'enrobage des comprimés ou produits disposés à l'intérieur de la masse du lot est plus long que celui des comprimés des couches externes. Cela a pour conséquence d'augmenter la durée du traitement et de réduire la productivité générale de l'installation. A cela, il faut ajouter que cette hétérogénéité des flux de produits entraîne aussi des différences d'aspect et de qualité nécessitant une intervention humaine pour ajuster la durée du traitement en fonction de la qualité recherchée.Another drawback of this technique is inherent in the heterogeneity of the product flows during the coating. Indeed, during the rotation of the tank, the products to be coated, and for example tablets, roll on themselves by describing trajectories in closed loops the longer they are near the surface of the batch or from the wall of the tank. Thus, the tablets placed in the middle of the batch describe shorter trajectories and hardly change their trajectory. As a result, they come less frequently to the surface of the lot. under the spray boom of the coating and that the coating is carried out, in part, by removal of the tablet coating layers which are external to them. The presence of blades or troughs slightly improves the transfer of the tablets between the different flows or trajectories. For this reason, the coating of tablets or products disposed within the mass of the batch is longer than that of the tablets of the outer layers. This has the effect of increasing the processing time and reducing the overall productivity of the installation. To this, it should be added that this heterogeneity of product flows also leads to differences in appearance and quality requiring a human intervention to adjust the duration of treatment according to the quality sought.
La présente invention a pour objet de remédier à ces inconvénients en fournissant une installation polyvalente, pouvant assurer l'enrobage de produits divers. quelles que soient leurs dimensions, au moyen d'un enrobage liquide ou pulvérulent, tout en améliorant la productivité et la qualité, et pouvant fonctionner en continu et de manière automatique, donc sans contrôle humain.The present invention aims to overcome these disadvantages by providing a multi-purpose facility that can ensure the coating of various products. whatever their dimensions, by means of a liquid or powder coating, while improving productivity and quality, and being able to operate continuously and automatically, therefore without human control.
A cet effet, dans l'installation selon l'invention, la cuve, de forme générale bitronconique à cônes inversés, présente une paroi intérieure lisse et est en contact d'étanchéité par son bord postérieur avec un disque central fixe, ce disque étant traversé, en partie supérieure, par une ouverture raccordée à l'une des branches du circuit d'air chaud, et en partie inférieure, par au moins une ouverture pour le passage d'au moins un organe mélangeur rotatif, cet organe, disposé dans la partie de la cuve recevant la plus grande épaisseur des produits à traiter, étant relié à des moyens disposés dans un caisson étanche qui, fixé contre le dos du disque central, est relié à l'autre branche du circuit d'air chaud.To this end, in the installation according to the invention, the tank, of generally bitronconic shape with inverted cones, has a smooth inner wall and is in sealing contact by its rear edge with a fixed central disc, this disc being traversed , at the top, through an opening connected to one of the branches of the hot air circuit and in the lower part by at least one opening for the passage of at least one rotating mixing member, this member, disposed in the part of the tank receiving the greatest thickness of the products to be treated, being connected to means arranged in a sealed box which, fixed against the back of the central disc, is connected to the other branch of the hot air circuit.
Ainsi, la cuve est débarrassée de toute pale et autres moyens favorisant le brassage des produits à enrober, mais gênant le nettoyage, puisque ce brassage est effectué par un ou plusieurs organes mélangeurs disposés dans la masse de produits à traiter, et générant, par leur rotation, des flux de déplacement qui chassent les comprimés disposés à l'intérieur de la masse sur la périphérie de celle-ci. Par ailleurs, les deux branches du circuit d'air chaud, qu'il s'agisse de la branche d'entrée ou de la branche de sortie, traversent le disque central fixe, ce qui débarrasse la cuve de toutes les contraintes inhérentes à ces circuits. La branche aboutissant au caisson communique avec l'organe mélangeur qui forme ainsi une sorte de manche à air travaillant en soufflant ou en aspirant, selon les besoins du traitement ou de la nature du produit à traiter.Thus, the tank is cleared of any blade and other means promoting the mixing of the products to be coated, but hampering cleaning, since this mixing is carried out by one or more mixing members arranged in the mass of products to be treated, and generating, by their rotation, displacement flows which expel the tablets placed inside the mass on the periphery thereof. Furthermore, the two branches of the hot air circuit, whether the inlet branch or the outlet branch, pass through the fixed central disk, which rids the tank of all the constraints inherent in these circuits. The branch leading to the chamber communicates with the mixing member which thus forms a sort of windsock working by blowing or suction, as appropriate processing or the nature of the product to be treated.
Dans une forme préférée d'exécution de l'invention, chacun des organes mélangeurs est relié à des moyens aptes à le déplacer, en translation et dans les deux sens, entre une position rétractée, dans laquelle il est à l'intérieur du caisson, et une position de travail dans laquelle il est hors du caisson et fait saillie à l'intérieur de la cuve dans la zone d'accumulation des produits à enrober.In a preferred embodiment of the invention, each of the mixing members is connected to means able to move it, in translation and in both directions, between a retracted position, in which it is inside the box, and a working position in which it is out of the box and protrusion within the vessel in the product accumulation area to be coated.
Cet agencement permet de simplifier le nettoyage de la cuve en la débarrassant de toute pièce pouvant gêner la trajectoire des moyens de nettoyage automatiques. D'autres caractéristiques et avantages ressortiront de la description qui suit en référence au dessin schématique annexé représentant, à titre d'exemple, une forme d'exécution de cette installation.This arrangement makes it possible to simplify the cleaning of the tank by ridding it of any part which may hinder the trajectory of the automatic cleaning means. Other characteristics and advantages will emerge from the description which follows with reference to the appended diagrammatic drawing representing, by way of example, an embodiment of this installation.
Figure 1 en est une vue de côté en coupe longitudinale. Figure 2 est une vue en coupe suivant II-II de figure 1 ,Figure 1 is a side view in longitudinal section. FIG. 2 is a sectional view along II-II of FIG. 1,
Figure 3 est une vue, par l'arrière, suivant la flèche III de figure 1 ,FIG. 3 is a view, from the rear, along arrow III of FIG. 1,
Figure 4 est une vue partielle, de côté, en coupe longitudinale, montrant, à échelle agrandie, les moyens d'entraînement en translation et en rotation des organes mélangeurs. Dans ce dessin, la référence numérique 2 désigne, de manière générale, la cuve de l'installation qui, comme montré à la figure 1, a une forme bitronconique à cônes inversés, c'est à dire est composée, en allant de l'avant vers l'arrière, d'une virole d'entrée cylindrique 3, d'une paroi antérieure tronconique 4, dont les génératrices convergent vers l'avant, et d'une paroi tronconique postérieure 5 dont les génératrices convergent vers l'arrière. L'angle au sommet formé par les génératrices de la paroi antérieure 4 est compris entre 120 et 160 °, et est ici de l'ordre de 140 °, tandis que l'angle au sommet formé par les génératrices de la paroi postérieure 5 est compris entre 1 et 20 °, et est ici de l'ordre de 15 °. La paroi intérieure de la cuve 2 est lisse et débarasséc de toute saillie. La virole cylindrique 3 constituant bouche d'entrée pour les produits à enrober et trou d'homme, est solidaire d'un anneau 6 qui est monté libre en rotation dans un palier à roulements 7 d'un bâti 8. Le bord libre postérieur de la paroi postérieure 5 de la cuve est solidaire d'une collerette radiale 9 qui est guidée en rotation par des rouleaux 10 portés par le bâti 8 précité. Cette collerette 9 vient en contact d'étanchéité, au moyen d'un joint approprié 12, montré figure 4. avec une portée tronconique 13 ménagée sur la périphérie d'un disque central 14 porté par le châssis 8.Figure 4 is a partial side view, in longitudinal section, showing, on an enlarged scale, the drive means in translation and in rotation of the mixing members. In this drawing, reference numeral 2 designates, in general, the tank of the installation, as shown in Figure 1, has a dual frustoconical shaped inverted cones, i.e. consists, going from the front to rear, a cylindrical inlet sleeve 3, a frusto-conical front wall 4, whose generatrices converge towards the front, and a rear frustoconical wall 5 whose generatrices converge towards the rear. The apex angle formed by the generatrices of the front wall 4 is between 120 and 160 °, and is here of the order of 140 °, while the apex angle formed by the generatrices of the posterior wall 5 is between 1 and 20 °, and is here of the order of 15 °. The inner wall of the tank 2 is smooth and free of any protrusions. The cylindrical shell 3 constituting the inlet mouth for the products to be coated and the manhole is integral with a ring 6 which is mounted to rotate freely in a rolling bearing 7 of a frame 8. The free rear edge of the rear wall 5 of the tank is integral with a radial flange 9 which is guided in rotation by rollers 10 carried by the above-mentioned frame 8. This flange 9 comes into sealing contact, by means of a suitable seal 12, shown in FIG. 4. with a frustoconical surface 13 formed on the periphery of a central disc 14 carried by the chassis 8.
La face interne de ce disque est lisse et sans aspérité.The internal face of this disc is smooth and without roughness.
La cuve 2 est reliée par une transmission de mouvements, non représentée, à des moyens moteurs aptes à l'entraîner en rotation, à vitesse variable, de l'ordre de 3 à 10 tours/minutes sous le contrôle d'une armoire de commande avec automate, non représentée. La cuve 2 est associée à trois organes mélangeurs 15 saillant vers l'avant à partir de la paroi arrière 14 et disposés, comme montré à la figure 2. dans la zone de la cuve 2 qui, lors de la rotation de cette cuve, contient la plus grande épaisseur de produits à enrober. La figure 2 montre, par le trait mixte N, le niveau supérieur des produits à enrober lorsque la cuve tourne. Dans la forme d'exécution représentée à la figure 1 , chaque organe mélangeur 15 s'étend longitudinalement jusqu'au plan diamétral D contenant le plus grand diamètre de la cuve, mais il est évident qu'il peut aller plus en avant et venir jusqu'à proximité de la paroi tronconique antérieure 4.The tank 2 is connected by a movement transmission, not shown, to drive means adapted to drive it in rotation at variable speed, of the order of 3 to 10 revolutions / minute under the control of a control unit with automaton, not shown. The tank 2 is associated with three mixing elements 15 projecting forwardly from the rear wall 14 and arranged, as shown in Figure 2. the bowl 2 area which, upon rotation of the vessel, contains the greater thickness of products to be coated. Figure 2 shows, by the dashed line N, the upper level of the products to be coated when the tank rotates. In the embodiment shown in Figure 1, each mixing member 15 extends longitudinally to the diametral plane D containing the most large diameter of the tank, but it is obvious that it can go forward and come up close to the front tapered wall 4.
Chaque organe mélangeur 15 comporte une paroi périphérique 1 1 (figure 4) poreuse à l'air. Selon la nature des produits à enrober et les conditions d'enrobage, cette paroi est constituée par une tôle métallique perforée ou par une nappe textile supportée par une armature interne. La figure 2 montre, qu'en section transversale, chaque organe mélangeur 15 comporte des pales lobées formant une croix à quatre branches, mais il est précisé que le nombre de chaque branche des croix, de même que la profondeur de l'intervalle entre branches, dépend des conditions de traitement et peut varier, sans sortir du cadre de l'invention.Each mixer member 15 has a peripheral wall 1 1 (Figure 4) porous to air. Depending on the nature of the products to be coated and conditions of coating, the wall is constituted by a perforated metal sheet or by a textile web supported by an internal frame. FIG. 2 shows that, in cross section, each mixing member 15 has lobed blades forming a cross with four branches, but it is specified that the number of each branch of the crosses, as well as the depth of the interval between branches , depends on the processing conditions and may vary, without departing from the scope of the invention.
Chaque organe mélangeur 15, traversant le disque central 14 par une ouverture 19, est solidaire d'un embout 17 par lequel il est monté de manière démontable, à l'extrémité antérieure 18 d'une cage 20. Dans la forme d'exécution représentée aux figures 1 et 4, l'embout 17 est muni d'un tenon en queue d'aronde s'engageant dans une glissière de section complémentaire ménagée dans la pièce 18, mais il est évident que tout autre moyen de liaison équivalent peut être utilisé. La cage 20 est montée libre en rotation, par des coussinets 22 ou des roulements, dans un châssis 23 commun aux différents organes 15. Ce châssis est monté libre en translation sur des glissières longitudinales 24, portées par un caisson 25. Ce caisson est fixé en saillie sur la partie postérieure du disque central 14 et, comme montré à la figure 3. enveloppe les moyens de déplacement en translation des organes mélangeurs 1 5 qu'il peut contenir lorsqu'ils sont rétractés.Each mixer member 15, passing through the central disc 14 by an opening 19, is secured to a nozzle 17 by which it is mounted detachably to the forward end 18 of a cage 20. In the embodiment shown to figures 1 and 4, the tip 17 is provided with a tenon dovetail engaging a complementary section formed in the slide component 18, but it is obvious that any other equivalent connection means may be used . The cage 20 is mounted free in rotation, by bearings 22 or bearings, in a chassis 23 common to the various members 15. This chassis is mounted free in translation on longitudinal slides 24, carried by a box 25. This box is fixed projecting from the rear part of the central disc 14 and, as shown in FIG. 3. envelops the means for translational movement of the mixer members 1 5 that it can contain when they are retracted.
Le châssis 23 est solidaire d'au moins un écrou 26 traversé par une tige filetée 27, montée libre en rotation mais calée en rotation dans un palier 28 du bâti 8.The chassis 23 is integral with at least one nut 26 crossed by a threaded rod 27, mounted free in rotation but locked in rotation in a bearing 28 of the frame 8.
Cette tige filetée, qui s'étend longitudinalement dans le caisson, est reliée, par son extrémité dépassant du palier 28 et par une transmission de mouvements par poulies crantées 29 et courroie crantée 30, à l'arbre de sortie d'un moteur électrique 32 porté par le châssis 8. La figure 4 montre que chaque ouverture 19 ménagée dans le disque central 14 pour un organe mélangeur 15, peut être occultée de manière étanche. lorsque cet organe est en position escamotée dans le caisson 25, par une portée conique 34 ménagée à l'extrémité libre de chaque organe 15 et venant en contact avec un joint 35 bordant dans l'ouverture 19 correspondante. L'entraînement en rotation de chaque cage 20 est assuré par l'intermédiaire d'un moyeu 36 lié à la cage, par exemple par des bras 36a. Ce moyeu est monté coulissant sur un arbre 37 qui, de section polygonale, coopère avec son alésage de section complémentaire pour assurer son calage en rotation. L'arbre 37 est monté libre en rotation dans un palier 38 du bâti 8 et est relié par une transmission par poulies crantées 39 et courroie crantée 40 à l'arbre de sortie d'un moteur électrique 42, ce moteur de type BRUSLESS est commun aux trois organes mélangeurs qu'il peut donc entraîner avec des vitesses variables, et voire même par à coups ou inversements de sens rapides pour générer des vibrations sous le contrôle de l'armoire de commande. Avec cet agencement, avant déversement des produits à enrober dans la cuve 2 jusqu'au niveau R à la figure 1, les organe mélangeurs 15 sont amenés dans la cuve par déplacement du châssis 20 au moyen de la tige filetée 27. On notera que, si ces organes 15 n'ont pas le profil ou la structure qu'il convient, ils peuvent être aisément remplacés à partir de la bouche d'entrée 3.This threaded rod, which extends longitudinally in the box, is connected, by its end projecting from the bearing 28 and by a transmission of movements by toothed pulleys 29 and toothed belt 30, to the output shaft of an electric motor 32 carried by the chassis 8. FIG. 4 shows that each opening 19 made in the central disc 14 for a mixing member 15, can be concealed in a sealed manner. when this member is in the retracted position in the box 25, by a conical bearing 34 formed at the free end of each member 15 and coming into contact with a seal 35 bordering in the corresponding opening 19. The drive in rotation of each cage 20 is ensured by means of a hub 36 linked to the cage, for example by arms 36a. This hub is slidably mounted on a shaft 37 which, of polygonal section, cooperates with its bore of complementary section to ensure its setting in rotation. The shaft 37 is mounted to rotate freely in a bearing 38 of the frame 8 and is connected by a transmission by toothed pulleys 39 and toothed belt 40 to the output shaft of an electric motor 42, this BRUSLESS type motor is common. the three bodies it can therefore lead mixers with variable speeds, and even by blows or reversals of fast direction to generate vibrations under the control of the control cabinet. With this arrangement, before the products to be coated are poured into the tank 2 up to level R in FIG. 1, the mixing members 15 are brought into the tank by displacement of the frame 20 by means of the threaded rod 27. It will be noted that, if these members 15 do not have the appropriate profile or structure, they can be easily replaced from the inlet mouth 3.
Après déversement des produits à enrober et mise en rotation de la cuve 2, chacun des organes 15 est entraîné en rotation par le moteur électrique commun 42 et par l'intermédiaire de la transmission de mouvements 39, 40, transmission qui, comme montré à la figure 3, comporte des poulies de renvoi intermédiaires 39a communiquant à chacun des organes 15 un sens de rotation inverse de celui de son voisin, comme représenté par les flèches 41.After the products to be coated have been poured out and the tank 2 has been rotated, each of the members 15 is rotated by the common electric motor 42 and by means of the transmission of movements 39, 40, transmission which, as shown in FIG. FIG. 3 comprises intermediate return pulleys 39a communicating to each of the members 15 a direction of rotation opposite to that of its neighbor, as shown by the arrows 41.
En raison de leur disposition au milieu de la masse de produits à enrober et de leur rotation, dont la vitesse et le sens peut varier pendant la phase d'enrobage, les organes mélangeurs 15 tendent à chasser les produits disposés au centre de la masse vers un niveau supérieur ou contre la paroi inférieure de la cuve 2, c'est à dire tendent à brasser les produits de manière qu'aucun d'eux ne stagne au centre de la masse, ce qui permet d'homogénéiser les flux de circulation de ces produits dans la masse, d'accélérer l'enrobage, de réduire le temps de fabrication, tout en améliorant la qualité de cet enrobage. De plus, les organes 15 augmentent de deux à trois foix la surface d'échange avec le flux d'air chaud favorisant le maintien en température et l'enrobage. Par ailleurs, grâce au recours à une cuve à paroi lisse, l'enrobage est facilité et une meilleure brillance peut être obtenue. Pour modifier la position des organes 15 dans la masse de produits à enrober, le disque 14 est lié au bâti 8 par des moyens permettant de modifier sa position angulaire et celle du châssis 25.Due to their arrangement in the middle of the mass of products to be coated and their rotation, the speed and direction may vary during the stage of coating, the mixing members 15 tend to expel the products arranged in the center of the mass towards a higher level or against the lower wall of the tank 2, that is to say tend to stir the products so that none of them stagnates in the center of the mass, which makes it possible to homogenize the circulation flows of these products in the mass, to accelerate the coating, to reduce the manufacturing time, while improving the quality of this coating. In addition, the members 15 increases from two to three foix the exchange surface with the hot air stream to promote the maintenance temperature and the coating. Furthermore, thanks to the use of a smooth-walled tank, the coating is facilitated and better gloss can be obtained. To modify the position of the members 15 in the mass of products to be coated, the disc 14 is linked to the frame 8 by means making it possible to modify its angular position and that of the chassis 25.
Après vidange de la cuve 2 et en vue du nettoyage, le châssis 23 est déplacé en sens inverse pour assurer la rétraction des organes 15 et leur retour en position escamotée dans le caisson 25. La figure 3 montre que le caisson 25 est raccordé à l'une des branches A du circuit d'air chaud dont l'autre branche B débouche dans la cuve 2 par une ouverture 50 ménagée à la partie supérieure du disque central 14. Cet aménagement permet de débarrasser la cuve de toute sujétion et contrainte relatives à ce circuit d'air et. selon les besoins, d'utiliser, comme bouche d'entrée, la branche A ou la branche B, sans qu'il y ait lieu de modifier mécaniquement et structurellement l'installation.After emptying the tank 2 and for cleaning, the chassis 23 is moved in the opposite direction to ensure the retraction of the members 15 and their return to the retracted position in the box 25. Figure 3 shows that the housing 25 is connected to one of the branches A hot air circuit of which the other branch B opens into the vessel 2 through an opening 50 formed at the upper portion of the central disc 14. This arrangement makes it possible to rid the tank of any subjection and constraint relating to this air circuit and. as needed, use branch A or branch B as the inlet, without having to mechanically and structurally modify the installation.
On notera que, dans les deux cas, les organes mélangeurs 15 forment manche à air, travaillant en soufflage ou en aspiration, en communiquant, par la cage 20, avec l'intérieur du caisson 25. La figure 1 montre que le disque 14 comporte également une ouverture axiale 52 pour le passage de la canne télescopique 53 des moyens 54 de pulvérisation du fluide d'enrobage ct une ouverture 55 pour le passage des éléments télescopiques 56 des moyens 57 de nettoyage automatique de cette cuve.It will be noted that, in both cases, the mixing members 15 form a windsock, working in blowing or in suction, communicating, by the cage 20, with the interior of the box 25. FIG. 1 shows that the disc 14 has also an axial opening 52 for the passage of the telescopic rod 53 of the means 54 for spraying the coating fluid and an opening 55 for the passage of the telescopic elements 56 of the means 57 for automatic cleaning of this tank.
Le châssis des moyens 54 et celui des moyens 57 sont fixés sur la partie postérieure du disque central 14 et l'extrémité libre des moyens télescopiques 53 ou 56 est munie de moyens d'étanchéité, par exemple d'une portée tronconique 53a. 56a, apte à venir en contact avec une portée complémentaire entourant le bord de l'ouverture correspondante 52 ou 55. Les moyens de pulvérisation du fluide d'enrobage sont bien connus de l'Homme de l'Art et n'ont pas à être décrits ici. Les moyens de nettoyage 57 peuvent présenter différentes formes, et en particulier, être similaires à ceux décrits dans la demande de brevet français n° 96 08909 au nom de la déposante.The chassis of the means 54 and that of the means 57 are fixed to the rear part of the central disc 14 and the free end of the telescopic means 53 or 56 is provided with sealing means, for example of a frustoconical bearing 53a. 56a capable of engaging a complementary bearing surface surrounding the edge of the corresponding opening 52 or 55. The means for spraying the fluid coating are well known to those skilled in the art and need not be described here. The cleaning means 57 can have different forms, and in particular, be similar to those described in French patent application No. 96 08909 in the name of the applicant.
L'évacuation des produits enrobés peut s'effectuer de manière traditionnelle, par la bouche d'entrée 3, mais, de préférence, elle s'effectue par l'intermédiaire d'une ouverture 60 ménagée dans la paroi antérieure tronconique de la cuve 2 et obturée par un volet 62 à commande automatique, non représentée.The evacuation of the coated products can be carried out in the traditional way, by the inlet mouth 3, but, preferably, it is carried out via an opening 60 formed in the frustoconical anterior wall of the tank 2 and closed by a shutter 62 with automatic control, not shown.
Dans cette forme d'exécution de la cuve 2, l'automate de l'armoire de commande comporte des moyens permettant, en fin d'enrobage, d'arrêter la cuve avec l'ouverture 60 et le volet 62 disposés à son point le plus bas.In this embodiment the tank 2, the controller of the control unit comprises means for, at the end of coating, to stop the vessel with the opening 60 and the shutter 62 disposed at the point the lower.
Ainsi, en fin d'enrobage, il suffit de commander l'ouverture du volet 62 pour permettre le déversement des produits enrobés sur un convoyeur 63 ou sur tout autre moyen transportant ces produits dans un récipient. Durant ce déversement, les organes mélangeurs 15 sont entraînés en rotation pour favoriser l'évacuation des produits enrobés. Bien entendu, après la fin de la vidange de la cuve, le volet 62 est refermé et il peut être procédé à une nouvelle opération d'enrobage. Une telle installation peut, sans aucune modification, enrober successivement des produits de dimensions diverses, allant du comprimé de 10 mm à la microgranule de 1 mm, et cela avec un enrobage liquide ou pulvérulent.Thus, at the end of coating, it suffices to control the opening of the shutter 62 to permit the discharge of coated products on a conveyor 63 or other means conveying the products in a container. During this spill, the mixing members 15 are rotated to promote the evacuation of the coated products. Of course, after the end of the emptying of the tank, the shutter 62 is closed and a new coating operation can be carried out. Such an installation can, without any modification, successively coat products of various dimensions, ranging from the 10 mm tablet to the 1 mm microgranule, and this with a liquid or powder coating.
En complément des avantages apportés sur la qualité et l'augmentation de la productivité et la facilité de nettoyage, cette installation peut être entièrement automatisée, tant en ce qui concerne le remplissage de la cuve, l'enrobage des produits, la gestion de l'enrobage et du courant d'air chaud, la vidange, mais aussi le nettoyage après un certain nombre de cycles. Une telle automatisation permet, non seulement, de réduire le temps de main d'oeuvre affecté à chaque cycle, mais également de multiplier par trois ou cinq la productivité d'une telle installation par rapport aux installations actuelles, et, surtout, en intégrant le nettoyage automatique à chaque changement de types de produits ou d'enrobage, de supprimer tous les risques de contamination croisée. In addition to the benefits of quality and increased productivity and ease of cleaning, this facility can be fully automated, both in regard to the filling of the tank, coating products, the management of the coating and hot air flow, emptying, but also cleaning after a certain number of cycles. Such automation not only makes it possible to reduce the labor time allocated to each cycle, but also to multiply by three or five the productivity of such an installation compared to current installations, and, above all, by integrating the automatic cleaning at each change of product types or coating, to remove all risks of cross contamination.

Claims

REVENDICATIONS
1. Installation pour l'enrobage de produits alimentaires ou pharmaceutiques comprenant une cuve (2), avec une bouche axiale (3) d'enlrée des produits, des moyens d'entraînement en rotation de la cuve (2), par rapport à un bâti (8), des moyens de pulvérisation (53) du revêtement sur la masse de produits disposés dans la partie inférieure de la cuve (2), un circuit d'air chaud traversant la masse de produits et une armoire de régulation, caractérisée en ce que la cuve (2), de forme générale bitronconique à cônes inversés (4, 5), présente une paroi intérieure lisse et est en contact d'étanchéité par son bord postérieur avec un disque central fixe (14), ce disque étant traversé, en partie supérieure, par une ouverture (50) raccordée à l'une des branches (B) du circuit d'air chaud, et en partie inférieure, par au moins une ouverture pour le passage d'au moins un organe mélangeur rotatif (15), cet organe, disposé dans la partie de la cuve (2) recevant la plus grande épaisseur des produits à traiter, étant relié à des moyens d'entraînement (36, 37) disposés dans un caisson étanche (25) qui, fixé contre le dos du disque central (14). est relié à l'autre branche (A) du circuit d'air chaud.1. Installation for the coating of food or pharmaceutical products comprising a tank (2), with an axial mouth (3) for entree of the products, means for driving in rotation of the tank (2), relative to a frame (8), spray means (53) of the coating on the mass of products arranged in the lower part of the tank (2), a circuit of hot air passing through the mass of products and a control cabinet, characterized in that the tank (2), of generally bitronconical shape with inverted cones (4, 5), has a smooth inner wall and is in sealing contact by its rear edge with a fixed central disc (14), this disc being traversed , at the top, through an opening (50) connected to the one leg (B) of the hot air circuit and in the lower part by at least one opening for the passage of at least one rotary mixer element ( 15), this member, arranged in the part of the tank (2) receiving the greater s large thickness of the products to be treated, being connected to drive means (36, 37) arranged in a sealed box (25) which, fixed against the back of the central disc (14). is connected to the other branch (A) of the hot air circuit.
2. Installation selon la revendication 1, caractérisée en ce que chacun des organes mélangeurs (15) est relié à des moyens (20, 26, 27) aptes à le déplacer, en translation et dans les deux sens, entre une position rétractée, dans laquelle il est à l'intérieur du caisson (25), et une position de travail dans laquelle il est hors du caisson et fait saillie à l'intérieur de la cuve (2), dans la zone d'accumulation des produits à enrober.2. Installation according to claim 1, characterized in that each of the mixing members (15) is connected to means (20, 26, 27) capable of moving it, in translation and in both directions, between a retracted position, in which it is inside the box (25), and a working position in which it is outside the box and protrudes inside the tank (2), in the zone of accumulation of the products to be coated.
3. Installation selon l'une quelconque des revendications 1 et 2, caractérisée en ce que les organes mélangeurs (15) sont au nombre de trois et sont chacun montés, de manière démontable, à l'extrémité antérieure d'une cage rotative3. Installation according to any one of claims 1 and 2, characterized in that the mixing members (15) are three in number and are each mounted, in a removable manner, at the front end of a rotary cage
(20), elle-même montée libre en rotation dans un châssis (23), ce châssis, commun aux trois organes (15), étant guidé en translation longitudinale par des glissières (24) du caisson commun (25) et solidaire d'au moins un écrou (26) coopérant avec une vis longitudinale (27) d'entraînement, liée à des moyens moteurs (32) aptes à l'entraîner en rotation.(20), itself mounted free in rotation in a frame (23), this frame, common to the three members (15), being guided in longitudinal translation by slides (24) of the common box (25) and integral with at least one nut (26) cooperating with a longitudinal screw (27) drive linked to the motor means (32) able to rotate.
4. Installation selon la revendication 3, caractérisée en ce que la cage (20) de chaque organe mélangeur (15) est solidaire d'un moyeu (36). lié en rotation à un arbre (37) sur lequel il est monté coulissant, ledit arbre (37) étant monté libre en rotation dans un palier (38) du bâti (8) et étant relié à un moteur électrique (42), commun à tous les organes (15), par une transmission de mouvements par pignons crantés (39) et courroie crantée (40) alternant les sens de rotation de ces organes. 4. Installation according to claim 3, characterized in that the cage (20) of each mixer member (15) is integral with a hub (36). linked in rotation to a shaft (37) on which it is slidably mounted, said shaft (37) being mounted for free rotation in a bearing (38) of the frame (8) and being connected to an electric motor (42), common to all the members (15), by a transmission of movements by toothed pinions (39) and toothed belt (40) alternating the directions of rotation of these members.
5. Installation selon la revendication 1, caractérisée en ce que chaque organe mélangeur (15) est en forme de manchon tubulaire alternant en surface des nervures et des rainures longitudinales externes et comporte une paroi périphérique (I I ) perméable à l'air du circuit d'air chaud de sections géométriques diverses. 5. Installation according to claim 1, characterized in that each mixing member (15) is in the form of a tubular sleeve alternating on the surface of the ribs and external longitudinal grooves and comprises a peripheral wall (II) permeable to air from the circuit d hot air of various geometric sections.
6. Installation selon la revendication 1 , caractérisée en ce que chaque organe mélangeur (15) comporte, à son extrémité libre, une portée d'étanchéité (34) apte, lorsqu'elle est en position rétractée, à venir en contact d'étanchéité avec le bord de l'ouverture (19) ménagée dans le disque fixe central (14) pour le passage de cet organe.6. Installation according to claim 1, characterized in that each mixing member (15) comprises, at its free end, a sealing surface (34) adapted, when in the retracted position, to come into sealing contact with the edge of the opening (19) formed in the central fixed disc (14) for the passage of this member.
7. Installation selon l'une quelconque des revendications 1 à 6, caractérisée en ce que le disque central (14) est traversé par une ouverture (52) pour le passage et la canne télescopique (53) des moyens (54) de pulvérisation de l'enrobage et d'une ouverture (55) pour le passage des éléments télescopiques (56) des moyens (57) de nettoyage automatique de la cuve, chacun de ces moyens étant muni, à son extrémité libre, de moyens d'étanchéité (53a, 56a) aptes à venir en contact d'étanchéité avec le bord de l'ouverture correspondante du disque central (14), lorsque lesdits moyens sont en position escamotée hors de la cuve.7. Installation according to any one of claims 1 to 6, characterized in that the central disc (14) is crossed by an opening (52) for the passage and the telescopic rod (53) of the means (54) for spraying the coating and an opening (55) for the passage of the telescopic elements (56) means (57) for automatic cleaning of the tank, each of said means being provided at its free end, with sealing means ( 53a, 56a) capable of coming into sealing contact with the edge of the corresponding opening of the central disc (14), when said means are in the retracted position out of the tank.
8. Installation selon la revendication 1 , caractérisée en ce que la cuve (2) comprend, de l'avant vers l'arrière, une bouche d'entrée cylindrique (3), montée libre en rotation dans un palier (6) du bâti (8), une paroi antérieure tronconique (7). dont les génératrices convergent vers l'avant, et forment un angle au sommet de valeur comprise entre 120 et 160 °, et une paroi postérieure tronconique (5), dont les génératrices convergent vers l'arrière et forment un angle au sommet de valeur comprise entre 10 et 20 °.8. Installation according to claim 1, characterized in that the tank (2) comprises, from front to rear, a cylindrical inlet mouth (3), mounted to rotate freely in a bearing (6) of the frame (8), a frustoconical anterior wall (7). whose generators converge forward, and form an angle at the apex of value between 120 and 160 °, and a frustoconical posterior wall (5), whose generators converge rearward and form an angle at the apex of value included between 10 and 20 °.
9. Installation selon la revendication 1 , caractérisée en ce que la paroi antérieure tronconique (4) de la cuve (2) comporte une ouverture (60) d'évacuation des produits enrobés, normalement fermée par un volet (62) à ouverture automatique, tandis que l'armoire de commande comporte des moyens permettant d'arrêter la cuve (2) avec l'ouverture (60) et le volet (62) au point le plus bas de cette cuve.9. Installation according to claim 1, characterized in that the frustoconical front wall (4) of the tank (2) comprises an opening (60) for discharging the coated products, normally closed by a shutter (62) with automatic opening, while the control cabinet comprises means for stopping the container (2) with the opening (60) and the flap (62) at the lowest point of the tank.
10. Installation selon la revendication 1, caractérisée en ce que le disque (14) est lié au bâti (8) par des moyens permettant de modifier sa position angulaire, et, en conséquence, celle des organes mélangeurs (15). 10. Installation according to claim 1, characterized in that the disc (14) is connected to the frame (8) by means making it possible to modify its angular position, and, consequently, that of the mixing members (15).
EP97932891A 1996-08-01 1997-07-10 Apparatus for coating foods or pharmaceuticals Withdrawn EP0914214A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9609988A FR2751849B1 (en) 1996-08-01 1996-08-01 PLANT FOR COATING FOOD OR PHARMACEUTICAL PRODUCTS
FR9609988 1996-08-01
PCT/FR1997/001268 WO1998005434A1 (en) 1996-08-01 1997-07-10 Apparatus for coating foods or pharmaceuticals

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EP0914214A1 true EP0914214A1 (en) 1999-05-12

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JP (1) JP2000516523A (en)
CN (1) CN1226847A (en)
AU (1) AU3626297A (en)
FR (1) FR2751849B1 (en)
WO (1) WO1998005434A1 (en)

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JP2000516523A (en) 2000-12-12
AU3626297A (en) 1998-02-25
FR2751849A1 (en) 1998-02-06
CN1226847A (en) 1999-08-25
WO1998005434A1 (en) 1998-02-12
FR2751849B1 (en) 1998-12-31

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